[  392.396622][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  392.397118][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  392.397118][   T72]      netdev_get_by_index+0x5e/0x80
[  392.397118][   T72]      fib6_nh_init+0x3d8/0x15b0
[  392.397118][   T72]      ip6_route_info_create+0xf18/0x17d0
[  392.397118][   T72]      addrconf_f6i_alloc+0x244/0x410
[  392.397118][   T72]      ipv6_add_addr+0x411/0x2000
[  392.397118][   T72]      inet6_addr_add+0x30e/0xa40
[  392.397118][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  392.397118][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.397118][   T72]      netlink_rcv_skb+0x130/0x360
[  392.397118][   T72]      netlink_unicast+0x449/0x710
[  392.397118][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.397118][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.397118][   T72]      ___sys_sendmsg+0xee/0x170
[  392.397118][   T72]      __sys_sendmsg+0xcd/0x170
[  392.397118][   T72]      do_syscall_64+0xc6/0x1e0
[  392.397118][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.397118][   T72] 
[  392.399286][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  392.399286][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  392.399286][   T72]      ipv6_find_idev+0x102/0x170
[  392.399286][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  392.399286][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.399286][   T72]      netlink_rcv_skb+0x130/0x360
[  392.399286][   T72]      netlink_unicast+0x449/0x710
[  392.399286][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.399286][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.399286][   T72]      ___sys_sendmsg+0xee/0x170
[  392.399286][   T72]      __sys_sendmsg+0xcd/0x170
[  392.399286][   T72]      do_syscall_64+0xc6/0x1e0
[  392.399286][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.399286][   T72] 
[  392.400981][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  392.400981][   T72]      neigh_parms_alloc+0x1e5/0x510
[  392.400981][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  392.400981][   T72]      ipv6_find_idev+0x102/0x170
[  392.400981][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  392.400981][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.400981][   T72]      netlink_rcv_skb+0x130/0x360
[  392.400981][   T72]      netlink_unicast+0x449/0x710
[  392.400981][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.400981][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.400981][   T72]      ___sys_sendmsg+0xee/0x170
[  392.400981][   T72]      __sys_sendmsg+0xcd/0x170
[  392.400981][   T72]      do_syscall_64+0xc6/0x1e0
[  392.400981][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.400981][   T72] 
[  392.402893][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  392.403162][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  392.403162][   T72]      netdev_get_by_index+0x5e/0x80
[  392.403162][   T72]      fib6_nh_init+0x3d8/0x15b0
[  392.403162][   T72]      ip6_route_info_create+0xf18/0x17d0
[  392.403162][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  392.403162][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  392.403162][   T72]      addrconf_join_anycast+0x1c0/0x220
[  392.403162][   T72]      dev_forward_change+0x2a6/0x7b0
[  392.403162][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  392.403162][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  392.403162][   T72]      proc_sys_call_handler+0x403/0x5e0
[  392.403162][   T72]      vfs_write+0x9e5/0x10a0
[  392.403162][   T72]      ksys_write+0xf5/0x1e0
[  392.403162][   T72]      do_syscall_64+0xc6/0x1e0
[  392.403162][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.403162][   T72] 
[  392.406022][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  392.406022][   T72]      netdev_get_by_index+0x5e/0x80
[  392.406022][   T72]      fib6_nh_init+0x3d8/0x15b0
[  392.406022][   T72]      ip6_route_info_create+0xf18/0x17d0
[  392.406022][   T72]      addrconf_f6i_alloc+0x244/0x410
[  392.406022][   T72]      ipv6_add_addr+0x411/0x2000
[  392.406022][   T72]      inet6_addr_add+0x30e/0xa40
[  392.406022][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  392.406022][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.406022][   T72]      netlink_rcv_skb+0x130/0x360
[  392.406022][   T72]      netlink_unicast+0x449/0x710
[  392.406022][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.406022][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.406022][   T72]      ___sys_sendmsg+0xee/0x170
[  392.406022][   T72]      __sys_sendmsg+0xcd/0x170
[  392.406022][   T72]      do_syscall_64+0xc6/0x1e0
[  392.406022][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.406022][   T72] 
[  392.408281][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  392.408281][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  392.408281][   T72]      ipv6_find_idev+0x102/0x170
[  392.408281][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  392.408281][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.408281][   T72]      netlink_rcv_skb+0x130/0x360
[  392.408281][   T72]      netlink_unicast+0x449/0x710
[  392.408281][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.408281][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.408281][   T72]      ___sys_sendmsg+0xee/0x170
[  392.408281][   T72]      __sys_sendmsg+0xcd/0x170
[  392.408281][   T72]      do_syscall_64+0xc6/0x1e0
[  392.408281][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.408281][   T72] 
[  392.410018][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  392.410018][   T72]      neigh_parms_alloc+0x1e5/0x510
[  392.410018][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  392.410018][   T72]      ipv6_find_idev+0x102/0x170
[  392.410018][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  392.410018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  392.410018][   T72]      netlink_rcv_skb+0x130/0x360
[  392.410018][   T72]      netlink_unicast+0x449/0x710
[  392.410018][   T72]      netlink_sendmsg+0x723/0xbe0
[  392.410018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  392.410018][   T72]      ___sys_sendmsg+0xee/0x170
[  392.410018][   T72]      __sys_sendmsg+0xcd/0x170
[  392.410018][   T72]      do_syscall_64+0xc6/0x1e0
[  392.410018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.410018][   T72] 
[  392.412035][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  392.412286][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  392.412286][   T72]      dst_init+0x84/0x4a0
[  392.412286][   T72]      dst_alloc+0x97/0x150
[  392.412286][   T72]      ip6_dst_alloc+0x23/0x90
[  392.412286][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  392.412286][   T72]      ip6_pol_route+0x56f/0x840
[  392.412286][   T72]      fib6_rule_lookup+0x227/0x600
[  392.412286][   T72]      ip6_route_output_flags+0x251/0x460
[  392.412286][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  392.412286][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  392.412286][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  392.412286][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  392.412286][   T72]      ip6_datagram_connect+0x2c/0x50
[  392.412286][   T72]      __sys_connect+0x217/0x2a0
[  392.412286][   T72]      __x64_sys_connect+0x72/0xb0
[  392.412286][   T72]      do_syscall_64+0xc6/0x1e0
[  392.412286][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  392.412286][   T72] 
[  402.580704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  402.581113][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  402.581113][   T72]      netdev_get_by_index+0x5e/0x80
[  402.581113][   T72]      fib6_nh_init+0x3d8/0x15b0
[  402.581113][   T72]      ip6_route_info_create+0xf18/0x17d0
[  402.581113][   T72]      addrconf_f6i_alloc+0x244/0x410
[  402.581113][   T72]      ipv6_add_addr+0x411/0x2000
[  402.581113][   T72]      inet6_addr_add+0x30e/0xa40
[  402.581113][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  402.581113][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.581113][   T72]      netlink_rcv_skb+0x130/0x360
[  402.581113][   T72]      netlink_unicast+0x449/0x710
[  402.581113][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.581113][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.581113][   T72]      ___sys_sendmsg+0xee/0x170
[  402.581113][   T72]      __sys_sendmsg+0xcd/0x170
[  402.581113][   T72]      do_syscall_64+0xc6/0x1e0
[  402.581113][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.581113][   T72] 
[  402.583135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  402.583135][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  402.583135][   T72]      ipv6_find_idev+0x102/0x170
[  402.583135][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  402.583135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.583135][   T72]      netlink_rcv_skb+0x130/0x360
[  402.583135][   T72]      netlink_unicast+0x449/0x710
[  402.583135][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.583135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.583135][   T72]      ___sys_sendmsg+0xee/0x170
[  402.583135][   T72]      __sys_sendmsg+0xcd/0x170
[  402.583135][   T72]      do_syscall_64+0xc6/0x1e0
[  402.583135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.583135][   T72] 
[  402.584700][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  402.584700][   T72]      neigh_parms_alloc+0x1e5/0x510
[  402.584700][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  402.584700][   T72]      ipv6_find_idev+0x102/0x170
[  402.584700][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  402.584700][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.584700][   T72]      netlink_rcv_skb+0x130/0x360
[  402.584700][   T72]      netlink_unicast+0x449/0x710
[  402.584700][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.584700][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.584700][   T72]      ___sys_sendmsg+0xee/0x170
[  402.584700][   T72]      __sys_sendmsg+0xcd/0x170
[  402.584700][   T72]      do_syscall_64+0xc6/0x1e0
[  402.584700][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.584700][   T72] 
[  402.586396][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  402.586684][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  402.586684][   T72]      netdev_get_by_index+0x5e/0x80
[  402.586684][   T72]      fib6_nh_init+0x3d8/0x15b0
[  402.586684][   T72]      ip6_route_info_create+0xf18/0x17d0
[  402.586684][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  402.586684][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  402.586684][   T72]      addrconf_join_anycast+0x1c0/0x220
[  402.586684][   T72]      dev_forward_change+0x2a6/0x7b0
[  402.586684][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  402.586684][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  402.586684][   T72]      proc_sys_call_handler+0x403/0x5e0
[  402.586684][   T72]      vfs_write+0x9e5/0x10a0
[  402.586684][   T72]      ksys_write+0xf5/0x1e0
[  402.586684][   T72]      do_syscall_64+0xc6/0x1e0
[  402.586684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.586684][   T72] 
[  402.588534][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  402.588534][   T72]      netdev_get_by_index+0x5e/0x80
[  402.588534][   T72]      fib6_nh_init+0x3d8/0x15b0
[  402.588534][   T72]      ip6_route_info_create+0xf18/0x17d0
[  402.588534][   T72]      addrconf_f6i_alloc+0x244/0x410
[  402.588534][   T72]      ipv6_add_addr+0x411/0x2000
[  402.588534][   T72]      inet6_addr_add+0x30e/0xa40
[  402.588534][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  402.588534][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.588534][   T72]      netlink_rcv_skb+0x130/0x360
[  402.588534][   T72]      netlink_unicast+0x449/0x710
[  402.588534][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.588534][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.588534][   T72]      ___sys_sendmsg+0xee/0x170
[  402.588534][   T72]      __sys_sendmsg+0xcd/0x170
[  402.588534][   T72]      do_syscall_64+0xc6/0x1e0
[  402.588534][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.588534][   T72] 
[  402.590518][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  402.590518][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  402.590518][   T72]      ipv6_find_idev+0x102/0x170
[  402.590518][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  402.590518][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.590518][   T72]      netlink_rcv_skb+0x130/0x360
[  402.590518][   T72]      netlink_unicast+0x449/0x710
[  402.590518][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.590518][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.590518][   T72]      ___sys_sendmsg+0xee/0x170
[  402.590518][   T72]      __sys_sendmsg+0xcd/0x170
[  402.590518][   T72]      do_syscall_64+0xc6/0x1e0
[  402.590518][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.590518][   T72] 
[  402.592051][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  402.592051][   T72]      neigh_parms_alloc+0x1e5/0x510
[  402.592051][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  402.592051][   T72]      ipv6_find_idev+0x102/0x170
[  402.592051][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  402.592051][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  402.592051][   T72]      netlink_rcv_skb+0x130/0x360
[  402.592051][   T72]      netlink_unicast+0x449/0x710
[  402.592051][   T72]      netlink_sendmsg+0x723/0xbe0
[  402.592051][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  402.592051][   T72]      ___sys_sendmsg+0xee/0x170
[  402.592051][   T72]      __sys_sendmsg+0xcd/0x170
[  402.592051][   T72]      do_syscall_64+0xc6/0x1e0
[  402.592051][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.592051][   T72] 
[  402.593724][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  402.593965][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  402.593965][   T72]      dst_init+0x84/0x4a0
[  402.593965][   T72]      dst_alloc+0x97/0x150
[  402.593965][   T72]      ip6_dst_alloc+0x23/0x90
[  402.593965][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  402.593965][   T72]      ip6_pol_route+0x56f/0x840
[  402.593965][   T72]      fib6_rule_lookup+0x227/0x600
[  402.593965][   T72]      ip6_route_output_flags+0x251/0x460
[  402.593965][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  402.593965][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  402.593965][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  402.593965][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  402.593965][   T72]      ip6_datagram_connect+0x2c/0x50
[  402.593965][   T72]      __sys_connect+0x217/0x2a0
[  402.593965][   T72]      __x64_sys_connect+0x72/0xb0
[  402.593965][   T72]      do_syscall_64+0xc6/0x1e0
[  402.593965][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  402.593965][   T72] 
[  412.604713][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  412.605220][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  412.605220][   T72]      netdev_get_by_index+0x5e/0x80
[  412.605220][   T72]      fib6_nh_init+0x3d8/0x15b0
[  412.605220][   T72]      ip6_route_info_create+0xf18/0x17d0
[  412.605220][   T72]      addrconf_f6i_alloc+0x244/0x410
[  412.605220][   T72]      ipv6_add_addr+0x411/0x2000
[  412.605220][   T72]      inet6_addr_add+0x30e/0xa40
[  412.605220][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  412.605220][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.605220][   T72]      netlink_rcv_skb+0x130/0x360
[  412.605220][   T72]      netlink_unicast+0x449/0x710
[  412.605220][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.605220][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.605220][   T72]      ___sys_sendmsg+0xee/0x170
[  412.605220][   T72]      __sys_sendmsg+0xcd/0x170
[  412.605220][   T72]      do_syscall_64+0xc6/0x1e0
[  412.605220][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.605220][   T72] 
[  412.607257][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  412.607257][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  412.607257][   T72]      ipv6_find_idev+0x102/0x170
[  412.607257][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  412.607257][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.607257][   T72]      netlink_rcv_skb+0x130/0x360
[  412.607257][   T72]      netlink_unicast+0x449/0x710
[  412.607257][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.607257][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.607257][   T72]      ___sys_sendmsg+0xee/0x170
[  412.607257][   T72]      __sys_sendmsg+0xcd/0x170
[  412.607257][   T72]      do_syscall_64+0xc6/0x1e0
[  412.607257][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.607257][   T72] 
[  412.608818][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  412.608818][   T72]      neigh_parms_alloc+0x1e5/0x510
[  412.608818][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  412.608818][   T72]      ipv6_find_idev+0x102/0x170
[  412.608818][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  412.608818][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.608818][   T72]      netlink_rcv_skb+0x130/0x360
[  412.608818][   T72]      netlink_unicast+0x449/0x710
[  412.608818][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.608818][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.608818][   T72]      ___sys_sendmsg+0xee/0x170
[  412.608818][   T72]      __sys_sendmsg+0xcd/0x170
[  412.608818][   T72]      do_syscall_64+0xc6/0x1e0
[  412.608818][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.608818][   T72] 
[  412.610537][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  412.610834][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  412.610834][   T72]      netdev_get_by_index+0x5e/0x80
[  412.610834][   T72]      fib6_nh_init+0x3d8/0x15b0
[  412.610834][   T72]      ip6_route_info_create+0xf18/0x17d0
[  412.610834][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  412.610834][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  412.610834][   T72]      addrconf_join_anycast+0x1c0/0x220
[  412.610834][   T72]      dev_forward_change+0x2a6/0x7b0
[  412.610834][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  412.610834][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  412.610834][   T72]      proc_sys_call_handler+0x403/0x5e0
[  412.610834][   T72]      vfs_write+0x9e5/0x10a0
[  412.610834][   T72]      ksys_write+0xf5/0x1e0
[  412.610834][   T72]      do_syscall_64+0xc6/0x1e0
[  412.610834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.610834][   T72] 
[  412.612694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  412.612694][   T72]      netdev_get_by_index+0x5e/0x80
[  412.612694][   T72]      fib6_nh_init+0x3d8/0x15b0
[  412.612694][   T72]      ip6_route_info_create+0xf18/0x17d0
[  412.612694][   T72]      addrconf_f6i_alloc+0x244/0x410
[  412.612694][   T72]      ipv6_add_addr+0x411/0x2000
[  412.612694][   T72]      inet6_addr_add+0x30e/0xa40
[  412.612694][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  412.612694][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.612694][   T72]      netlink_rcv_skb+0x130/0x360
[  412.612694][   T72]      netlink_unicast+0x449/0x710
[  412.612694][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.612694][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.612694][   T72]      ___sys_sendmsg+0xee/0x170
[  412.612694][   T72]      __sys_sendmsg+0xcd/0x170
[  412.612694][   T72]      do_syscall_64+0xc6/0x1e0
[  412.612694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.612694][   T72] 
[  412.614697][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  412.614697][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  412.614697][   T72]      ipv6_find_idev+0x102/0x170
[  412.614697][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  412.614697][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.614697][   T72]      netlink_rcv_skb+0x130/0x360
[  412.614697][   T72]      netlink_unicast+0x449/0x710
[  412.614697][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.614697][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.614697][   T72]      ___sys_sendmsg+0xee/0x170
[  412.614697][   T72]      __sys_sendmsg+0xcd/0x170
[  412.614697][   T72]      do_syscall_64+0xc6/0x1e0
[  412.614697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.614697][   T72] 
[  412.616242][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  412.616242][   T72]      neigh_parms_alloc+0x1e5/0x510
[  412.616242][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  412.616242][   T72]      ipv6_find_idev+0x102/0x170
[  412.616242][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  412.616242][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  412.616242][   T72]      netlink_rcv_skb+0x130/0x360
[  412.616242][   T72]      netlink_unicast+0x449/0x710
[  412.616242][   T72]      netlink_sendmsg+0x723/0xbe0
[  412.616242][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  412.616242][   T72]      ___sys_sendmsg+0xee/0x170
[  412.616242][   T72]      __sys_sendmsg+0xcd/0x170
[  412.616242][   T72]      do_syscall_64+0xc6/0x1e0
[  412.616242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.616242][   T72] 
[  412.617931][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  412.618180][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  412.618180][   T72]      dst_init+0x84/0x4a0
[  412.618180][   T72]      dst_alloc+0x97/0x150
[  412.618180][   T72]      ip6_dst_alloc+0x23/0x90
[  412.618180][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  412.618180][   T72]      ip6_pol_route+0x56f/0x840
[  412.618180][   T72]      fib6_rule_lookup+0x227/0x600
[  412.618180][   T72]      ip6_route_output_flags+0x251/0x460
[  412.618180][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  412.618180][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  412.618180][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  412.618180][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  412.618180][   T72]      ip6_datagram_connect+0x2c/0x50
[  412.618180][   T72]      __sys_connect+0x217/0x2a0
[  412.618180][   T72]      __x64_sys_connect+0x72/0xb0
[  412.618180][   T72]      do_syscall_64+0xc6/0x1e0
[  412.618180][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  412.618180][   T72] 
[  422.860747][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  422.861251][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  422.861251][   T72]      netdev_get_by_index+0x5e/0x80
[  422.861251][   T72]      fib6_nh_init+0x3d8/0x15b0
[  422.861251][   T72]      ip6_route_info_create+0xf18/0x17d0
[  422.861251][   T72]      addrconf_f6i_alloc+0x244/0x410
[  422.861251][   T72]      ipv6_add_addr+0x411/0x2000
[  422.861251][   T72]      inet6_addr_add+0x30e/0xa40
[  422.861251][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  422.861251][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.861251][   T72]      netlink_rcv_skb+0x130/0x360
[  422.861251][   T72]      netlink_unicast+0x449/0x710
[  422.861251][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.861251][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.861251][   T72]      ___sys_sendmsg+0xee/0x170
[  422.861251][   T72]      __sys_sendmsg+0xcd/0x170
[  422.861251][   T72]      do_syscall_64+0xc6/0x1e0
[  422.861251][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.861251][   T72] 
[  422.863277][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  422.863277][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  422.863277][   T72]      ipv6_find_idev+0x102/0x170
[  422.863277][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  422.863277][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.863277][   T72]      netlink_rcv_skb+0x130/0x360
[  422.863277][   T72]      netlink_unicast+0x449/0x710
[  422.863277][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.863277][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.863277][   T72]      ___sys_sendmsg+0xee/0x170
[  422.863277][   T72]      __sys_sendmsg+0xcd/0x170
[  422.863277][   T72]      do_syscall_64+0xc6/0x1e0
[  422.863277][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.863277][   T72] 
[  422.864834][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  422.864834][   T72]      neigh_parms_alloc+0x1e5/0x510
[  422.864834][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  422.864834][   T72]      ipv6_find_idev+0x102/0x170
[  422.864834][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  422.864834][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.864834][   T72]      netlink_rcv_skb+0x130/0x360
[  422.864834][   T72]      netlink_unicast+0x449/0x710
[  422.864834][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.864834][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.864834][   T72]      ___sys_sendmsg+0xee/0x170
[  422.864834][   T72]      __sys_sendmsg+0xcd/0x170
[  422.864834][   T72]      do_syscall_64+0xc6/0x1e0
[  422.864834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.864834][   T72] 
[  422.866551][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  422.866843][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  422.866843][   T72]      netdev_get_by_index+0x5e/0x80
[  422.866843][   T72]      fib6_nh_init+0x3d8/0x15b0
[  422.866843][   T72]      ip6_route_info_create+0xf18/0x17d0
[  422.866843][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  422.866843][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  422.866843][   T72]      addrconf_join_anycast+0x1c0/0x220
[  422.866843][   T72]      dev_forward_change+0x2a6/0x7b0
[  422.866843][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  422.866843][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  422.866843][   T72]      proc_sys_call_handler+0x403/0x5e0
[  422.866843][   T72]      vfs_write+0x9e5/0x10a0
[  422.866843][   T72]      ksys_write+0xf5/0x1e0
[  422.866843][   T72]      do_syscall_64+0xc6/0x1e0
[  422.866843][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.866843][   T72] 
[  422.868741][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  422.868741][   T72]      netdev_get_by_index+0x5e/0x80
[  422.868741][   T72]      fib6_nh_init+0x3d8/0x15b0
[  422.868741][   T72]      ip6_route_info_create+0xf18/0x17d0
[  422.868741][   T72]      addrconf_f6i_alloc+0x244/0x410
[  422.868741][   T72]      ipv6_add_addr+0x411/0x2000
[  422.868741][   T72]      inet6_addr_add+0x30e/0xa40
[  422.868741][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  422.868741][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.868741][   T72]      netlink_rcv_skb+0x130/0x360
[  422.868741][   T72]      netlink_unicast+0x449/0x710
[  422.868741][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.868741][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.868741][   T72]      ___sys_sendmsg+0xee/0x170
[  422.868741][   T72]      __sys_sendmsg+0xcd/0x170
[  422.868741][   T72]      do_syscall_64+0xc6/0x1e0
[  422.868741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.868741][   T72] 
[  422.870747][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  422.870747][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  422.870747][   T72]      ipv6_find_idev+0x102/0x170
[  422.870747][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  422.870747][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.870747][   T72]      netlink_rcv_skb+0x130/0x360
[  422.870747][   T72]      netlink_unicast+0x449/0x710
[  422.870747][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.870747][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.870747][   T72]      ___sys_sendmsg+0xee/0x170
[  422.870747][   T72]      __sys_sendmsg+0xcd/0x170
[  422.870747][   T72]      do_syscall_64+0xc6/0x1e0
[  422.870747][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.870747][   T72] 
[  422.872281][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  422.872281][   T72]      neigh_parms_alloc+0x1e5/0x510
[  422.872281][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  422.872281][   T72]      ipv6_find_idev+0x102/0x170
[  422.872281][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  422.872281][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  422.872281][   T72]      netlink_rcv_skb+0x130/0x360
[  422.872281][   T72]      netlink_unicast+0x449/0x710
[  422.872281][   T72]      netlink_sendmsg+0x723/0xbe0
[  422.872281][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  422.872281][   T72]      ___sys_sendmsg+0xee/0x170
[  422.872281][   T72]      __sys_sendmsg+0xcd/0x170
[  422.872281][   T72]      do_syscall_64+0xc6/0x1e0
[  422.872281][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.872281][   T72] 
[  422.873974][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  422.874219][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  422.874219][   T72]      dst_init+0x84/0x4a0
[  422.874219][   T72]      dst_alloc+0x97/0x150
[  422.874219][   T72]      ip6_dst_alloc+0x23/0x90
[  422.874219][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  422.874219][   T72]      ip6_pol_route+0x56f/0x840
[  422.874219][   T72]      fib6_rule_lookup+0x227/0x600
[  422.874219][   T72]      ip6_route_output_flags+0x251/0x460
[  422.874219][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  422.874219][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  422.874219][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  422.874219][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  422.874219][   T72]      ip6_datagram_connect+0x2c/0x50
[  422.874219][   T72]      __sys_connect+0x217/0x2a0
[  422.874219][   T72]      __x64_sys_connect+0x72/0xb0
[  422.874219][   T72]      do_syscall_64+0xc6/0x1e0
[  422.874219][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  422.874219][   T72] 
[  433.116642][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  433.117101][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  433.117101][   T72]      netdev_get_by_index+0x5e/0x80
[  433.117101][   T72]      fib6_nh_init+0x3d8/0x15b0
[  433.117101][   T72]      ip6_route_info_create+0xf18/0x17d0
[  433.117101][   T72]      addrconf_f6i_alloc+0x244/0x410
[  433.117101][   T72]      ipv6_add_addr+0x411/0x2000
[  433.117101][   T72]      inet6_addr_add+0x30e/0xa40
[  433.117101][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  433.117101][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.117101][   T72]      netlink_rcv_skb+0x130/0x360
[  433.117101][   T72]      netlink_unicast+0x449/0x710
[  433.117101][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.117101][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.117101][   T72]      ___sys_sendmsg+0xee/0x170
[  433.117101][   T72]      __sys_sendmsg+0xcd/0x170
[  433.117101][   T72]      do_syscall_64+0xc6/0x1e0
[  433.117101][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.117101][   T72] 
[  433.119127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  433.119127][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  433.119127][   T72]      ipv6_find_idev+0x102/0x170
[  433.119127][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  433.119127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.119127][   T72]      netlink_rcv_skb+0x130/0x360
[  433.119127][   T72]      netlink_unicast+0x449/0x710
[  433.119127][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.119127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.119127][   T72]      ___sys_sendmsg+0xee/0x170
[  433.119127][   T72]      __sys_sendmsg+0xcd/0x170
[  433.119127][   T72]      do_syscall_64+0xc6/0x1e0
[  433.119127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.119127][   T72] 
[  433.120685][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  433.120685][   T72]      neigh_parms_alloc+0x1e5/0x510
[  433.120685][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  433.120685][   T72]      ipv6_find_idev+0x102/0x170
[  433.120685][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  433.120685][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.120685][   T72]      netlink_rcv_skb+0x130/0x360
[  433.120685][   T72]      netlink_unicast+0x449/0x710
[  433.120685][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.120685][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.120685][   T72]      ___sys_sendmsg+0xee/0x170
[  433.120685][   T72]      __sys_sendmsg+0xcd/0x170
[  433.120685][   T72]      do_syscall_64+0xc6/0x1e0
[  433.120685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.120685][   T72] 
[  433.122402][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  433.122694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  433.122694][   T72]      netdev_get_by_index+0x5e/0x80
[  433.122694][   T72]      fib6_nh_init+0x3d8/0x15b0
[  433.122694][   T72]      ip6_route_info_create+0xf18/0x17d0
[  433.122694][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  433.122694][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  433.122694][   T72]      addrconf_join_anycast+0x1c0/0x220
[  433.122694][   T72]      dev_forward_change+0x2a6/0x7b0
[  433.122694][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  433.122694][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  433.122694][   T72]      proc_sys_call_handler+0x403/0x5e0
[  433.122694][   T72]      vfs_write+0x9e5/0x10a0
[  433.122694][   T72]      ksys_write+0xf5/0x1e0
[  433.122694][   T72]      do_syscall_64+0xc6/0x1e0
[  433.122694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.122694][   T72] 
[  433.124548][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  433.124548][   T72]      netdev_get_by_index+0x5e/0x80
[  433.124548][   T72]      fib6_nh_init+0x3d8/0x15b0
[  433.124548][   T72]      ip6_route_info_create+0xf18/0x17d0
[  433.124548][   T72]      addrconf_f6i_alloc+0x244/0x410
[  433.124548][   T72]      ipv6_add_addr+0x411/0x2000
[  433.124548][   T72]      inet6_addr_add+0x30e/0xa40
[  433.124548][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  433.124548][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.124548][   T72]      netlink_rcv_skb+0x130/0x360
[  433.124548][   T72]      netlink_unicast+0x449/0x710
[  433.124548][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.124548][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.124548][   T72]      ___sys_sendmsg+0xee/0x170
[  433.124548][   T72]      __sys_sendmsg+0xcd/0x170
[  433.124548][   T72]      do_syscall_64+0xc6/0x1e0
[  433.124548][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.124548][   T72] 
[  433.126555][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  433.126555][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  433.126555][   T72]      ipv6_find_idev+0x102/0x170
[  433.126555][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  433.126555][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.126555][   T72]      netlink_rcv_skb+0x130/0x360
[  433.126555][   T72]      netlink_unicast+0x449/0x710
[  433.126555][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.126555][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.126555][   T72]      ___sys_sendmsg+0xee/0x170
[  433.126555][   T72]      __sys_sendmsg+0xcd/0x170
[  433.126555][   T72]      do_syscall_64+0xc6/0x1e0
[  433.126555][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.126555][   T72] 
[  433.128107][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  433.128107][   T72]      neigh_parms_alloc+0x1e5/0x510
[  433.128107][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  433.128107][   T72]      ipv6_find_idev+0x102/0x170
[  433.128107][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  433.128107][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  433.128107][   T72]      netlink_rcv_skb+0x130/0x360
[  433.128107][   T72]      netlink_unicast+0x449/0x710
[  433.128107][   T72]      netlink_sendmsg+0x723/0xbe0
[  433.128107][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  433.128107][   T72]      ___sys_sendmsg+0xee/0x170
[  433.128107][   T72]      __sys_sendmsg+0xcd/0x170
[  433.128107][   T72]      do_syscall_64+0xc6/0x1e0
[  433.128107][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.128107][   T72] 
[  433.129897][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  433.130149][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  433.130149][   T72]      dst_init+0x84/0x4a0
[  433.130149][   T72]      dst_alloc+0x97/0x150
[  433.130149][   T72]      ip6_dst_alloc+0x23/0x90
[  433.130149][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  433.130149][   T72]      ip6_pol_route+0x56f/0x840
[  433.130149][   T72]      fib6_rule_lookup+0x227/0x600
[  433.130149][   T72]      ip6_route_output_flags+0x251/0x460
[  433.130149][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  433.130149][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  433.130149][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  433.130149][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  433.130149][   T72]      ip6_datagram_connect+0x2c/0x50
[  433.130149][   T72]      __sys_connect+0x217/0x2a0
[  433.130149][   T72]      __x64_sys_connect+0x72/0xb0
[  433.130149][   T72]      do_syscall_64+0xc6/0x1e0
[  433.130149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  433.130149][   T72] 
[  443.372715][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  443.373165][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  443.373165][   T72]      netdev_get_by_index+0x5e/0x80
[  443.373165][   T72]      fib6_nh_init+0x3d8/0x15b0
[  443.373165][   T72]      ip6_route_info_create+0xf18/0x17d0
[  443.373165][   T72]      addrconf_f6i_alloc+0x244/0x410
[  443.373165][   T72]      ipv6_add_addr+0x411/0x2000
[  443.373165][   T72]      inet6_addr_add+0x30e/0xa40
[  443.373165][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  443.373165][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.373165][   T72]      netlink_rcv_skb+0x130/0x360
[  443.373165][   T72]      netlink_unicast+0x449/0x710
[  443.373165][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.373165][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.373165][   T72]      ___sys_sendmsg+0xee/0x170
[  443.373165][   T72]      __sys_sendmsg+0xcd/0x170
[  443.373165][   T72]      do_syscall_64+0xc6/0x1e0
[  443.373165][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.373165][   T72] 
[  443.375171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  443.375171][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  443.375171][   T72]      ipv6_find_idev+0x102/0x170
[  443.375171][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  443.375171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.375171][   T72]      netlink_rcv_skb+0x130/0x360
[  443.375171][   T72]      netlink_unicast+0x449/0x710
[  443.375171][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.375171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.375171][   T72]      ___sys_sendmsg+0xee/0x170
[  443.375171][   T72]      __sys_sendmsg+0xcd/0x170
[  443.375171][   T72]      do_syscall_64+0xc6/0x1e0
[  443.375171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.375171][   T72] 
[  443.376707][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  443.376707][   T72]      neigh_parms_alloc+0x1e5/0x510
[  443.376707][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  443.376707][   T72]      ipv6_find_idev+0x102/0x170
[  443.376707][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  443.376707][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.376707][   T72]      netlink_rcv_skb+0x130/0x360
[  443.376707][   T72]      netlink_unicast+0x449/0x710
[  443.376707][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.376707][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.376707][   T72]      ___sys_sendmsg+0xee/0x170
[  443.376707][   T72]      __sys_sendmsg+0xcd/0x170
[  443.376707][   T72]      do_syscall_64+0xc6/0x1e0
[  443.376707][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.376707][   T72] 
[  443.378418][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  443.378701][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  443.378701][   T72]      netdev_get_by_index+0x5e/0x80
[  443.378701][   T72]      fib6_nh_init+0x3d8/0x15b0
[  443.378701][   T72]      ip6_route_info_create+0xf18/0x17d0
[  443.378701][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  443.378701][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  443.378701][   T72]      addrconf_join_anycast+0x1c0/0x220
[  443.378701][   T72]      dev_forward_change+0x2a6/0x7b0
[  443.378701][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  443.378701][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  443.378701][   T72]      proc_sys_call_handler+0x403/0x5e0
[  443.378701][   T72]      vfs_write+0x9e5/0x10a0
[  443.378701][   T72]      ksys_write+0xf5/0x1e0
[  443.378701][   T72]      do_syscall_64+0xc6/0x1e0
[  443.378701][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.378701][   T72] 
[  443.380539][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  443.380539][   T72]      netdev_get_by_index+0x5e/0x80
[  443.380539][   T72]      fib6_nh_init+0x3d8/0x15b0
[  443.380539][   T72]      ip6_route_info_create+0xf18/0x17d0
[  443.380539][   T72]      addrconf_f6i_alloc+0x244/0x410
[  443.380539][   T72]      ipv6_add_addr+0x411/0x2000
[  443.380539][   T72]      inet6_addr_add+0x30e/0xa40
[  443.380539][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  443.380539][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.380539][   T72]      netlink_rcv_skb+0x130/0x360
[  443.380539][   T72]      netlink_unicast+0x449/0x710
[  443.380539][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.380539][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.380539][   T72]      ___sys_sendmsg+0xee/0x170
[  443.380539][   T72]      __sys_sendmsg+0xcd/0x170
[  443.380539][   T72]      do_syscall_64+0xc6/0x1e0
[  443.380539][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.380539][   T72] 
[  443.382531][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  443.382531][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  443.382531][   T72]      ipv6_find_idev+0x102/0x170
[  443.382531][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  443.382531][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.382531][   T72]      netlink_rcv_skb+0x130/0x360
[  443.382531][   T72]      netlink_unicast+0x449/0x710
[  443.382531][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.382531][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.382531][   T72]      ___sys_sendmsg+0xee/0x170
[  443.382531][   T72]      __sys_sendmsg+0xcd/0x170
[  443.382531][   T72]      do_syscall_64+0xc6/0x1e0
[  443.382531][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.382531][   T72] 
[  443.384059][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  443.384059][   T72]      neigh_parms_alloc+0x1e5/0x510
[  443.384059][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  443.384059][   T72]      ipv6_find_idev+0x102/0x170
[  443.384059][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  443.384059][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  443.384059][   T72]      netlink_rcv_skb+0x130/0x360
[  443.384059][   T72]      netlink_unicast+0x449/0x710
[  443.384059][   T72]      netlink_sendmsg+0x723/0xbe0
[  443.384059][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  443.384059][   T72]      ___sys_sendmsg+0xee/0x170
[  443.384059][   T72]      __sys_sendmsg+0xcd/0x170
[  443.384059][   T72]      do_syscall_64+0xc6/0x1e0
[  443.384059][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.384059][   T72] 
[  443.385749][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  443.385991][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  443.385991][   T72]      dst_init+0x84/0x4a0
[  443.385991][   T72]      dst_alloc+0x97/0x150
[  443.385991][   T72]      ip6_dst_alloc+0x23/0x90
[  443.385991][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  443.385991][   T72]      ip6_pol_route+0x56f/0x840
[  443.385991][   T72]      fib6_rule_lookup+0x227/0x600
[  443.385991][   T72]      ip6_route_output_flags+0x251/0x460
[  443.385991][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  443.385991][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  443.385991][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  443.385991][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  443.385991][   T72]      ip6_datagram_connect+0x2c/0x50
[  443.385991][   T72]      __sys_connect+0x217/0x2a0
[  443.385991][   T72]      __x64_sys_connect+0x72/0xb0
[  443.385991][   T72]      do_syscall_64+0xc6/0x1e0
[  443.385991][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  443.385991][   T72] 
[  453.628676][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  453.629123][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  453.629123][   T72]      netdev_get_by_index+0x5e/0x80
[  453.629123][   T72]      fib6_nh_init+0x3d8/0x15b0
[  453.629123][   T72]      ip6_route_info_create+0xf18/0x17d0
[  453.629123][   T72]      addrconf_f6i_alloc+0x244/0x410
[  453.629123][   T72]      ipv6_add_addr+0x411/0x2000
[  453.629123][   T72]      inet6_addr_add+0x30e/0xa40
[  453.629123][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  453.629123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.629123][   T72]      netlink_rcv_skb+0x130/0x360
[  453.629123][   T72]      netlink_unicast+0x449/0x710
[  453.629123][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.629123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.629123][   T72]      ___sys_sendmsg+0xee/0x170
[  453.629123][   T72]      __sys_sendmsg+0xcd/0x170
[  453.629123][   T72]      do_syscall_64+0xc6/0x1e0
[  453.629123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.629123][   T72] 
[  453.631105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  453.631105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  453.631105][   T72]      ipv6_find_idev+0x102/0x170
[  453.631105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  453.631105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.631105][   T72]      netlink_rcv_skb+0x130/0x360
[  453.631105][   T72]      netlink_unicast+0x449/0x710
[  453.631105][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.631105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.631105][   T72]      ___sys_sendmsg+0xee/0x170
[  453.631105][   T72]      __sys_sendmsg+0xcd/0x170
[  453.631105][   T72]      do_syscall_64+0xc6/0x1e0
[  453.631105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.631105][   T72] 
[  453.632730][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  453.632730][   T72]      neigh_parms_alloc+0x1e5/0x510
[  453.632730][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  453.632730][   T72]      ipv6_find_idev+0x102/0x170
[  453.632730][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  453.632730][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.632730][   T72]      netlink_rcv_skb+0x130/0x360
[  453.632730][   T72]      netlink_unicast+0x449/0x710
[  453.632730][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.632730][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.632730][   T72]      ___sys_sendmsg+0xee/0x170
[  453.632730][   T72]      __sys_sendmsg+0xcd/0x170
[  453.632730][   T72]      do_syscall_64+0xc6/0x1e0
[  453.632730][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.632730][   T72] 
[  453.634407][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  453.634719][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  453.634719][   T72]      netdev_get_by_index+0x5e/0x80
[  453.634719][   T72]      fib6_nh_init+0x3d8/0x15b0
[  453.634719][   T72]      ip6_route_info_create+0xf18/0x17d0
[  453.634719][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  453.634719][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  453.634719][   T72]      addrconf_join_anycast+0x1c0/0x220
[  453.634719][   T72]      dev_forward_change+0x2a6/0x7b0
[  453.634719][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  453.634719][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  453.634719][   T72]      proc_sys_call_handler+0x403/0x5e0
[  453.634719][   T72]      vfs_write+0x9e5/0x10a0
[  453.634719][   T72]      ksys_write+0xf5/0x1e0
[  453.634719][   T72]      do_syscall_64+0xc6/0x1e0
[  453.634719][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.634719][   T72] 
[  453.636553][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  453.636553][   T72]      netdev_get_by_index+0x5e/0x80
[  453.636553][   T72]      fib6_nh_init+0x3d8/0x15b0
[  453.636553][   T72]      ip6_route_info_create+0xf18/0x17d0
[  453.636553][   T72]      addrconf_f6i_alloc+0x244/0x410
[  453.636553][   T72]      ipv6_add_addr+0x411/0x2000
[  453.636553][   T72]      inet6_addr_add+0x30e/0xa40
[  453.636553][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  453.636553][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.636553][   T72]      netlink_rcv_skb+0x130/0x360
[  453.636553][   T72]      netlink_unicast+0x449/0x710
[  453.636553][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.636553][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.636553][   T72]      ___sys_sendmsg+0xee/0x170
[  453.636553][   T72]      __sys_sendmsg+0xcd/0x170
[  453.636553][   T72]      do_syscall_64+0xc6/0x1e0
[  453.636553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.636553][   T72] 
[  453.638518][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  453.638518][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  453.638518][   T72]      ipv6_find_idev+0x102/0x170
[  453.638518][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  453.638518][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.638518][   T72]      netlink_rcv_skb+0x130/0x360
[  453.638518][   T72]      netlink_unicast+0x449/0x710
[  453.638518][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.638518][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.638518][   T72]      ___sys_sendmsg+0xee/0x170
[  453.638518][   T72]      __sys_sendmsg+0xcd/0x170
[  453.638518][   T72]      do_syscall_64+0xc6/0x1e0
[  453.638518][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.638518][   T72] 
[  453.640018][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  453.640018][   T72]      neigh_parms_alloc+0x1e5/0x510
[  453.640018][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  453.640018][   T72]      ipv6_find_idev+0x102/0x170
[  453.640018][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  453.640018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  453.640018][   T72]      netlink_rcv_skb+0x130/0x360
[  453.640018][   T72]      netlink_unicast+0x449/0x710
[  453.640018][   T72]      netlink_sendmsg+0x723/0xbe0
[  453.640018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  453.640018][   T72]      ___sys_sendmsg+0xee/0x170
[  453.640018][   T72]      __sys_sendmsg+0xcd/0x170
[  453.640018][   T72]      do_syscall_64+0xc6/0x1e0
[  453.640018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.640018][   T72] 
[  453.641673][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  453.641923][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  453.641923][   T72]      dst_init+0x84/0x4a0
[  453.641923][   T72]      dst_alloc+0x97/0x150
[  453.641923][   T72]      ip6_dst_alloc+0x23/0x90
[  453.641923][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  453.641923][   T72]      ip6_pol_route+0x56f/0x840
[  453.641923][   T72]      fib6_rule_lookup+0x227/0x600
[  453.641923][   T72]      ip6_route_output_flags+0x251/0x460
[  453.641923][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  453.641923][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  453.641923][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  453.641923][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  453.641923][   T72]      ip6_datagram_connect+0x2c/0x50
[  453.641923][   T72]      __sys_connect+0x217/0x2a0
[  453.641923][   T72]      __x64_sys_connect+0x72/0xb0
[  453.641923][   T72]      do_syscall_64+0xc6/0x1e0
[  453.641923][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  453.641923][   T72] 
[  463.884648][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  463.885097][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  463.885097][   T72]      netdev_get_by_index+0x5e/0x80
[  463.885097][   T72]      fib6_nh_init+0x3d8/0x15b0
[  463.885097][   T72]      ip6_route_info_create+0xf18/0x17d0
[  463.885097][   T72]      addrconf_f6i_alloc+0x244/0x410
[  463.885097][   T72]      ipv6_add_addr+0x411/0x2000
[  463.885097][   T72]      inet6_addr_add+0x30e/0xa40
[  463.885097][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  463.885097][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.885097][   T72]      netlink_rcv_skb+0x130/0x360
[  463.885097][   T72]      netlink_unicast+0x449/0x710
[  463.885097][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.885097][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.885097][   T72]      ___sys_sendmsg+0xee/0x170
[  463.885097][   T72]      __sys_sendmsg+0xcd/0x170
[  463.885097][   T72]      do_syscall_64+0xc6/0x1e0
[  463.885097][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.885097][   T72] 
[  463.887075][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  463.887075][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  463.887075][   T72]      ipv6_find_idev+0x102/0x170
[  463.887075][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  463.887075][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.887075][   T72]      netlink_rcv_skb+0x130/0x360
[  463.887075][   T72]      netlink_unicast+0x449/0x710
[  463.887075][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.887075][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.887075][   T72]      ___sys_sendmsg+0xee/0x170
[  463.887075][   T72]      __sys_sendmsg+0xcd/0x170
[  463.887075][   T72]      do_syscall_64+0xc6/0x1e0
[  463.887075][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.887075][   T72] 
[  463.888654][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  463.888654][   T72]      neigh_parms_alloc+0x1e5/0x510
[  463.888654][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  463.888654][   T72]      ipv6_find_idev+0x102/0x170
[  463.888654][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  463.888654][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.888654][   T72]      netlink_rcv_skb+0x130/0x360
[  463.888654][   T72]      netlink_unicast+0x449/0x710
[  463.888654][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.888654][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.888654][   T72]      ___sys_sendmsg+0xee/0x170
[  463.888654][   T72]      __sys_sendmsg+0xcd/0x170
[  463.888654][   T72]      do_syscall_64+0xc6/0x1e0
[  463.888654][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.888654][   T72] 
[  463.890350][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  463.890626][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  463.890626][   T72]      netdev_get_by_index+0x5e/0x80
[  463.890626][   T72]      fib6_nh_init+0x3d8/0x15b0
[  463.890626][   T72]      ip6_route_info_create+0xf18/0x17d0
[  463.890626][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  463.890626][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  463.890626][   T72]      addrconf_join_anycast+0x1c0/0x220
[  463.890626][   T72]      dev_forward_change+0x2a6/0x7b0
[  463.890626][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  463.890626][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  463.890626][   T72]      proc_sys_call_handler+0x403/0x5e0
[  463.890626][   T72]      vfs_write+0x9e5/0x10a0
[  463.890626][   T72]      ksys_write+0xf5/0x1e0
[  463.890626][   T72]      do_syscall_64+0xc6/0x1e0
[  463.890626][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.890626][   T72] 
[  463.892478][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  463.892478][   T72]      netdev_get_by_index+0x5e/0x80
[  463.892478][   T72]      fib6_nh_init+0x3d8/0x15b0
[  463.892478][   T72]      ip6_route_info_create+0xf18/0x17d0
[  463.892478][   T72]      addrconf_f6i_alloc+0x244/0x410
[  463.892478][   T72]      ipv6_add_addr+0x411/0x2000
[  463.892478][   T72]      inet6_addr_add+0x30e/0xa40
[  463.892478][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  463.892478][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.892478][   T72]      netlink_rcv_skb+0x130/0x360
[  463.892478][   T72]      netlink_unicast+0x449/0x710
[  463.892478][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.892478][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.892478][   T72]      ___sys_sendmsg+0xee/0x170
[  463.892478][   T72]      __sys_sendmsg+0xcd/0x170
[  463.892478][   T72]      do_syscall_64+0xc6/0x1e0
[  463.892478][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.892478][   T72] 
[  463.894439][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  463.894439][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  463.894439][   T72]      ipv6_find_idev+0x102/0x170
[  463.894439][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  463.894439][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.894439][   T72]      netlink_rcv_skb+0x130/0x360
[  463.894439][   T72]      netlink_unicast+0x449/0x710
[  463.894439][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.894439][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.894439][   T72]      ___sys_sendmsg+0xee/0x170
[  463.894439][   T72]      __sys_sendmsg+0xcd/0x170
[  463.894439][   T72]      do_syscall_64+0xc6/0x1e0
[  463.894439][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.894439][   T72] 
[  463.895965][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  463.895965][   T72]      neigh_parms_alloc+0x1e5/0x510
[  463.895965][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  463.895965][   T72]      ipv6_find_idev+0x102/0x170
[  463.895965][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  463.895965][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  463.895965][   T72]      netlink_rcv_skb+0x130/0x360
[  463.895965][   T72]      netlink_unicast+0x449/0x710
[  463.895965][   T72]      netlink_sendmsg+0x723/0xbe0
[  463.895965][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  463.895965][   T72]      ___sys_sendmsg+0xee/0x170
[  463.895965][   T72]      __sys_sendmsg+0xcd/0x170
[  463.895965][   T72]      do_syscall_64+0xc6/0x1e0
[  463.895965][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.895965][   T72] 
[  463.897652][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  463.897909][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  463.897909][   T72]      dst_init+0x84/0x4a0
[  463.897909][   T72]      dst_alloc+0x97/0x150
[  463.897909][   T72]      ip6_dst_alloc+0x23/0x90
[  463.897909][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  463.897909][   T72]      ip6_pol_route+0x56f/0x840
[  463.897909][   T72]      fib6_rule_lookup+0x227/0x600
[  463.897909][   T72]      ip6_route_output_flags+0x251/0x460
[  463.897909][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  463.897909][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  463.897909][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  463.897909][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  463.897909][   T72]      ip6_datagram_connect+0x2c/0x50
[  463.897909][   T72]      __sys_connect+0x217/0x2a0
[  463.897909][   T72]      __x64_sys_connect+0x72/0xb0
[  463.897909][   T72]      do_syscall_64+0xc6/0x1e0
[  463.897909][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  463.897909][   T72] 
[  473.988650][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  473.989086][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  473.989086][   T72]      netdev_get_by_index+0x5e/0x80
[  473.989086][   T72]      fib6_nh_init+0x3d8/0x15b0
[  473.989086][   T72]      ip6_route_info_create+0xf18/0x17d0
[  473.989086][   T72]      addrconf_f6i_alloc+0x244/0x410
[  473.989086][   T72]      ipv6_add_addr+0x411/0x2000
[  473.989086][   T72]      inet6_addr_add+0x30e/0xa40
[  473.989086][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  473.989086][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.989086][   T72]      netlink_rcv_skb+0x130/0x360
[  473.989086][   T72]      netlink_unicast+0x449/0x710
[  473.989086][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.989086][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.989086][   T72]      ___sys_sendmsg+0xee/0x170
[  473.989086][   T72]      __sys_sendmsg+0xcd/0x170
[  473.989086][   T72]      do_syscall_64+0xc6/0x1e0
[  473.989086][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.989086][   T72] 
[  473.991056][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  473.991056][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  473.991056][   T72]      ipv6_find_idev+0x102/0x170
[  473.991056][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  473.991056][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.991056][   T72]      netlink_rcv_skb+0x130/0x360
[  473.991056][   T72]      netlink_unicast+0x449/0x710
[  473.991056][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.991056][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.991056][   T72]      ___sys_sendmsg+0xee/0x170
[  473.991056][   T72]      __sys_sendmsg+0xcd/0x170
[  473.991056][   T72]      do_syscall_64+0xc6/0x1e0
[  473.991056][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.991056][   T72] 
[  473.992569][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  473.992569][   T72]      neigh_parms_alloc+0x1e5/0x510
[  473.992569][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  473.992569][   T72]      ipv6_find_idev+0x102/0x170
[  473.992569][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  473.992569][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.992569][   T72]      netlink_rcv_skb+0x130/0x360
[  473.992569][   T72]      netlink_unicast+0x449/0x710
[  473.992569][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.992569][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.992569][   T72]      ___sys_sendmsg+0xee/0x170
[  473.992569][   T72]      __sys_sendmsg+0xcd/0x170
[  473.992569][   T72]      do_syscall_64+0xc6/0x1e0
[  473.992569][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.992569][   T72] 
[  473.994223][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  473.994491][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  473.994491][   T72]      netdev_get_by_index+0x5e/0x80
[  473.994491][   T72]      fib6_nh_init+0x3d8/0x15b0
[  473.994491][   T72]      ip6_route_info_create+0xf18/0x17d0
[  473.994491][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  473.994491][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  473.994491][   T72]      addrconf_join_anycast+0x1c0/0x220
[  473.994491][   T72]      dev_forward_change+0x2a6/0x7b0
[  473.994491][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  473.994491][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  473.994491][   T72]      proc_sys_call_handler+0x403/0x5e0
[  473.994491][   T72]      vfs_write+0x9e5/0x10a0
[  473.994491][   T72]      ksys_write+0xf5/0x1e0
[  473.994491][   T72]      do_syscall_64+0xc6/0x1e0
[  473.994491][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.994491][   T72] 
[  473.996296][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  473.996296][   T72]      netdev_get_by_index+0x5e/0x80
[  473.996296][   T72]      fib6_nh_init+0x3d8/0x15b0
[  473.996296][   T72]      ip6_route_info_create+0xf18/0x17d0
[  473.996296][   T72]      addrconf_f6i_alloc+0x244/0x410
[  473.996296][   T72]      ipv6_add_addr+0x411/0x2000
[  473.996296][   T72]      inet6_addr_add+0x30e/0xa40
[  473.996296][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  473.996296][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.996296][   T72]      netlink_rcv_skb+0x130/0x360
[  473.996296][   T72]      netlink_unicast+0x449/0x710
[  473.996296][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.996296][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.996296][   T72]      ___sys_sendmsg+0xee/0x170
[  473.996296][   T72]      __sys_sendmsg+0xcd/0x170
[  473.996296][   T72]      do_syscall_64+0xc6/0x1e0
[  473.996296][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.996296][   T72] 
[  473.998369][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  473.998369][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  473.998369][   T72]      ipv6_find_idev+0x102/0x170
[  473.998369][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  473.998369][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.998369][   T72]      netlink_rcv_skb+0x130/0x360
[  473.998369][   T72]      netlink_unicast+0x449/0x710
[  473.998369][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.998369][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.998369][   T72]      ___sys_sendmsg+0xee/0x170
[  473.998369][   T72]      __sys_sendmsg+0xcd/0x170
[  473.998369][   T72]      do_syscall_64+0xc6/0x1e0
[  473.998369][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.998369][   T72] 
[  473.999878][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  473.999878][   T72]      neigh_parms_alloc+0x1e5/0x510
[  473.999878][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  473.999878][   T72]      ipv6_find_idev+0x102/0x170
[  473.999878][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  473.999878][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  473.999878][   T72]      netlink_rcv_skb+0x130/0x360
[  473.999878][   T72]      netlink_unicast+0x449/0x710
[  473.999878][   T72]      netlink_sendmsg+0x723/0xbe0
[  473.999878][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  473.999878][   T72]      ___sys_sendmsg+0xee/0x170
[  473.999878][   T72]      __sys_sendmsg+0xcd/0x170
[  473.999878][   T72]      do_syscall_64+0xc6/0x1e0
[  473.999878][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  473.999878][   T72] 
[  474.001534][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  474.001795][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  474.001795][   T72]      dst_init+0x84/0x4a0
[  474.001795][   T72]      dst_alloc+0x97/0x150
[  474.001795][   T72]      ip6_dst_alloc+0x23/0x90
[  474.001795][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  474.001795][   T72]      ip6_pol_route+0x56f/0x840
[  474.001795][   T72]      fib6_rule_lookup+0x227/0x600
[  474.001795][   T72]      ip6_route_output_flags+0x251/0x460
[  474.001795][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  474.001795][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  474.001795][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  474.001795][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  474.001795][   T72]      ip6_datagram_connect+0x2c/0x50
[  474.001795][   T72]      __sys_connect+0x217/0x2a0
[  474.001795][   T72]      __x64_sys_connect+0x72/0xb0
[  474.001795][   T72]      do_syscall_64+0xc6/0x1e0
[  474.001795][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  474.001795][   T72] 
[  484.036633][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  484.037048][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  484.037048][   T72]      netdev_get_by_index+0x5e/0x80
[  484.037048][   T72]      fib6_nh_init+0x3d8/0x15b0
[  484.037048][   T72]      ip6_route_info_create+0xf18/0x17d0
[  484.037048][   T72]      addrconf_f6i_alloc+0x244/0x410
[  484.037048][   T72]      ipv6_add_addr+0x411/0x2000
[  484.037048][   T72]      inet6_addr_add+0x30e/0xa40
[  484.037048][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  484.037048][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.037048][   T72]      netlink_rcv_skb+0x130/0x360
[  484.037048][   T72]      netlink_unicast+0x449/0x710
[  484.037048][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.037048][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.037048][   T72]      ___sys_sendmsg+0xee/0x170
[  484.037048][   T72]      __sys_sendmsg+0xcd/0x170
[  484.037048][   T72]      do_syscall_64+0xc6/0x1e0
[  484.037048][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.037048][   T72] 
[  484.039270][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  484.039270][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  484.039270][   T72]      ipv6_find_idev+0x102/0x170
[  484.039270][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  484.039270][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.039270][   T72]      netlink_rcv_skb+0x130/0x360
[  484.039270][   T72]      netlink_unicast+0x449/0x710
[  484.039270][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.039270][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.039270][   T72]      ___sys_sendmsg+0xee/0x170
[  484.039270][   T72]      __sys_sendmsg+0xcd/0x170
[  484.039270][   T72]      do_syscall_64+0xc6/0x1e0
[  484.039270][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.039270][   T72] 
[  484.040974][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  484.040974][   T72]      neigh_parms_alloc+0x1e5/0x510
[  484.040974][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  484.040974][   T72]      ipv6_find_idev+0x102/0x170
[  484.040974][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  484.040974][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.040974][   T72]      netlink_rcv_skb+0x130/0x360
[  484.040974][   T72]      netlink_unicast+0x449/0x710
[  484.040974][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.040974][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.040974][   T72]      ___sys_sendmsg+0xee/0x170
[  484.040974][   T72]      __sys_sendmsg+0xcd/0x170
[  484.040974][   T72]      do_syscall_64+0xc6/0x1e0
[  484.040974][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.040974][   T72] 
[  484.042828][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  484.043104][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  484.043104][   T72]      netdev_get_by_index+0x5e/0x80
[  484.043104][   T72]      fib6_nh_init+0x3d8/0x15b0
[  484.043104][   T72]      ip6_route_info_create+0xf18/0x17d0
[  484.043104][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  484.043104][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  484.043104][   T72]      addrconf_join_anycast+0x1c0/0x220
[  484.043104][   T72]      dev_forward_change+0x2a6/0x7b0
[  484.043104][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  484.043104][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  484.043104][   T72]      proc_sys_call_handler+0x403/0x5e0
[  484.043104][   T72]      vfs_write+0x9e5/0x10a0
[  484.043104][   T72]      ksys_write+0xf5/0x1e0
[  484.043104][   T72]      do_syscall_64+0xc6/0x1e0
[  484.043104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.043104][   T72] 
[  484.044931][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  484.044931][   T72]      netdev_get_by_index+0x5e/0x80
[  484.044931][   T72]      fib6_nh_init+0x3d8/0x15b0
[  484.044931][   T72]      ip6_route_info_create+0xf18/0x17d0
[  484.044931][   T72]      addrconf_f6i_alloc+0x244/0x410
[  484.044931][   T72]      ipv6_add_addr+0x411/0x2000
[  484.044931][   T72]      inet6_addr_add+0x30e/0xa40
[  484.044931][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  484.044931][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.044931][   T72]      netlink_rcv_skb+0x130/0x360
[  484.044931][   T72]      netlink_unicast+0x449/0x710
[  484.044931][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.044931][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.044931][   T72]      ___sys_sendmsg+0xee/0x170
[  484.044931][   T72]      __sys_sendmsg+0xcd/0x170
[  484.044931][   T72]      do_syscall_64+0xc6/0x1e0
[  484.044931][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.044931][   T72] 
[  484.046888][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  484.046888][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  484.046888][   T72]      ipv6_find_idev+0x102/0x170
[  484.046888][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  484.046888][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.046888][   T72]      netlink_rcv_skb+0x130/0x360
[  484.046888][   T72]      netlink_unicast+0x449/0x710
[  484.046888][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.046888][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.046888][   T72]      ___sys_sendmsg+0xee/0x170
[  484.046888][   T72]      __sys_sendmsg+0xcd/0x170
[  484.046888][   T72]      do_syscall_64+0xc6/0x1e0
[  484.046888][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.046888][   T72] 
[  484.048408][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  484.048408][   T72]      neigh_parms_alloc+0x1e5/0x510
[  484.048408][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  484.048408][   T72]      ipv6_find_idev+0x102/0x170
[  484.048408][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  484.048408][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  484.048408][   T72]      netlink_rcv_skb+0x130/0x360
[  484.048408][   T72]      netlink_unicast+0x449/0x710
[  484.048408][   T72]      netlink_sendmsg+0x723/0xbe0
[  484.048408][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  484.048408][   T72]      ___sys_sendmsg+0xee/0x170
[  484.048408][   T72]      __sys_sendmsg+0xcd/0x170
[  484.048408][   T72]      do_syscall_64+0xc6/0x1e0
[  484.048408][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.048408][   T72] 
[  484.050069][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  484.050318][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  484.050318][   T72]      dst_init+0x84/0x4a0
[  484.050318][   T72]      dst_alloc+0x97/0x150
[  484.050318][   T72]      ip6_dst_alloc+0x23/0x90
[  484.050318][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  484.050318][   T72]      ip6_pol_route+0x56f/0x840
[  484.050318][   T72]      fib6_rule_lookup+0x227/0x600
[  484.050318][   T72]      ip6_route_output_flags+0x251/0x460
[  484.050318][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  484.050318][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  484.050318][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  484.050318][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  484.050318][   T72]      ip6_datagram_connect+0x2c/0x50
[  484.050318][   T72]      __sys_connect+0x217/0x2a0
[  484.050318][   T72]      __x64_sys_connect+0x72/0xb0
[  484.050318][   T72]      do_syscall_64+0xc6/0x1e0
[  484.050318][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  484.050318][   T72] 
[  494.300728][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  494.301168][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  494.301168][   T72]      netdev_get_by_index+0x5e/0x80
[  494.301168][   T72]      fib6_nh_init+0x3d8/0x15b0
[  494.301168][   T72]      ip6_route_info_create+0xf18/0x17d0
[  494.301168][   T72]      addrconf_f6i_alloc+0x244/0x410
[  494.301168][   T72]      ipv6_add_addr+0x411/0x2000
[  494.301168][   T72]      inet6_addr_add+0x30e/0xa40
[  494.301168][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  494.301168][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.301168][   T72]      netlink_rcv_skb+0x130/0x360
[  494.301168][   T72]      netlink_unicast+0x449/0x710
[  494.301168][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.301168][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.301168][   T72]      ___sys_sendmsg+0xee/0x170
[  494.301168][   T72]      __sys_sendmsg+0xcd/0x170
[  494.301168][   T72]      do_syscall_64+0xc6/0x1e0
[  494.301168][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.301168][   T72] 
[  494.303161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  494.303161][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  494.303161][   T72]      ipv6_find_idev+0x102/0x170
[  494.303161][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  494.303161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.303161][   T72]      netlink_rcv_skb+0x130/0x360
[  494.303161][   T72]      netlink_unicast+0x449/0x710
[  494.303161][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.303161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.303161][   T72]      ___sys_sendmsg+0xee/0x170
[  494.303161][   T72]      __sys_sendmsg+0xcd/0x170
[  494.303161][   T72]      do_syscall_64+0xc6/0x1e0
[  494.303161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.303161][   T72] 
[  494.304673][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  494.304673][   T72]      neigh_parms_alloc+0x1e5/0x510
[  494.304673][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  494.304673][   T72]      ipv6_find_idev+0x102/0x170
[  494.304673][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  494.304673][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.304673][   T72]      netlink_rcv_skb+0x130/0x360
[  494.304673][   T72]      netlink_unicast+0x449/0x710
[  494.304673][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.304673][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.304673][   T72]      ___sys_sendmsg+0xee/0x170
[  494.304673][   T72]      __sys_sendmsg+0xcd/0x170
[  494.304673][   T72]      do_syscall_64+0xc6/0x1e0
[  494.304673][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.304673][   T72] 
[  494.306348][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  494.306634][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  494.306634][   T72]      netdev_get_by_index+0x5e/0x80
[  494.306634][   T72]      fib6_nh_init+0x3d8/0x15b0
[  494.306634][   T72]      ip6_route_info_create+0xf18/0x17d0
[  494.306634][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  494.306634][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  494.306634][   T72]      addrconf_join_anycast+0x1c0/0x220
[  494.306634][   T72]      dev_forward_change+0x2a6/0x7b0
[  494.306634][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  494.306634][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  494.306634][   T72]      proc_sys_call_handler+0x403/0x5e0
[  494.306634][   T72]      vfs_write+0x9e5/0x10a0
[  494.306634][   T72]      ksys_write+0xf5/0x1e0
[  494.306634][   T72]      do_syscall_64+0xc6/0x1e0
[  494.306634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.306634][   T72] 
[  494.308468][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  494.308468][   T72]      netdev_get_by_index+0x5e/0x80
[  494.308468][   T72]      fib6_nh_init+0x3d8/0x15b0
[  494.308468][   T72]      ip6_route_info_create+0xf18/0x17d0
[  494.308468][   T72]      addrconf_f6i_alloc+0x244/0x410
[  494.308468][   T72]      ipv6_add_addr+0x411/0x2000
[  494.308468][   T72]      inet6_addr_add+0x30e/0xa40
[  494.308468][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  494.308468][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.308468][   T72]      netlink_rcv_skb+0x130/0x360
[  494.308468][   T72]      netlink_unicast+0x449/0x710
[  494.308468][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.308468][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.308468][   T72]      ___sys_sendmsg+0xee/0x170
[  494.308468][   T72]      __sys_sendmsg+0xcd/0x170
[  494.308468][   T72]      do_syscall_64+0xc6/0x1e0
[  494.308468][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.308468][   T72] 
[  494.310511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  494.310511][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  494.310511][   T72]      ipv6_find_idev+0x102/0x170
[  494.310511][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  494.310511][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.310511][   T72]      netlink_rcv_skb+0x130/0x360
[  494.310511][   T72]      netlink_unicast+0x449/0x710
[  494.310511][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.310511][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.310511][   T72]      ___sys_sendmsg+0xee/0x170
[  494.310511][   T72]      __sys_sendmsg+0xcd/0x170
[  494.310511][   T72]      do_syscall_64+0xc6/0x1e0
[  494.310511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.310511][   T72] 
[  494.312024][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  494.312024][   T72]      neigh_parms_alloc+0x1e5/0x510
[  494.312024][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  494.312024][   T72]      ipv6_find_idev+0x102/0x170
[  494.312024][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  494.312024][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  494.312024][   T72]      netlink_rcv_skb+0x130/0x360
[  494.312024][   T72]      netlink_unicast+0x449/0x710
[  494.312024][   T72]      netlink_sendmsg+0x723/0xbe0
[  494.312024][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  494.312024][   T72]      ___sys_sendmsg+0xee/0x170
[  494.312024][   T72]      __sys_sendmsg+0xcd/0x170
[  494.312024][   T72]      do_syscall_64+0xc6/0x1e0
[  494.312024][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.312024][   T72] 
[  494.313681][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  494.313915][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  494.313915][   T72]      dst_init+0x84/0x4a0
[  494.313915][   T72]      dst_alloc+0x97/0x150
[  494.313915][   T72]      ip6_dst_alloc+0x23/0x90
[  494.313915][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  494.313915][   T72]      ip6_pol_route+0x56f/0x840
[  494.313915][   T72]      fib6_rule_lookup+0x227/0x600
[  494.313915][   T72]      ip6_route_output_flags+0x251/0x460
[  494.313915][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  494.313915][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  494.313915][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  494.313915][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  494.313915][   T72]      ip6_datagram_connect+0x2c/0x50
[  494.313915][   T72]      __sys_connect+0x217/0x2a0
[  494.313915][   T72]      __x64_sys_connect+0x72/0xb0
[  494.313915][   T72]      do_syscall_64+0xc6/0x1e0
[  494.313915][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  494.313915][   T72] 
[  504.564667][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  504.565098][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  504.565098][   T72]      netdev_get_by_index+0x5e/0x80
[  504.565098][   T72]      fib6_nh_init+0x3d8/0x15b0
[  504.565098][   T72]      ip6_route_info_create+0xf18/0x17d0
[  504.565098][   T72]      addrconf_f6i_alloc+0x244/0x410
[  504.565098][   T72]      ipv6_add_addr+0x411/0x2000
[  504.565098][   T72]      inet6_addr_add+0x30e/0xa40
[  504.565098][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  504.565098][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.565098][   T72]      netlink_rcv_skb+0x130/0x360
[  504.565098][   T72]      netlink_unicast+0x449/0x710
[  504.565098][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.565098][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.565098][   T72]      ___sys_sendmsg+0xee/0x170
[  504.565098][   T72]      __sys_sendmsg+0xcd/0x170
[  504.565098][   T72]      do_syscall_64+0xc6/0x1e0
[  504.565098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.565098][   T72] 
[  504.567087][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  504.567087][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  504.567087][   T72]      ipv6_find_idev+0x102/0x170
[  504.567087][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  504.567087][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.567087][   T72]      netlink_rcv_skb+0x130/0x360
[  504.567087][   T72]      netlink_unicast+0x449/0x710
[  504.567087][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.567087][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.567087][   T72]      ___sys_sendmsg+0xee/0x170
[  504.567087][   T72]      __sys_sendmsg+0xcd/0x170
[  504.567087][   T72]      do_syscall_64+0xc6/0x1e0
[  504.567087][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.567087][   T72] 
[  504.568604][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  504.568604][   T72]      neigh_parms_alloc+0x1e5/0x510
[  504.568604][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  504.568604][   T72]      ipv6_find_idev+0x102/0x170
[  504.568604][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  504.568604][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.568604][   T72]      netlink_rcv_skb+0x130/0x360
[  504.568604][   T72]      netlink_unicast+0x449/0x710
[  504.568604][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.568604][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.568604][   T72]      ___sys_sendmsg+0xee/0x170
[  504.568604][   T72]      __sys_sendmsg+0xcd/0x170
[  504.568604][   T72]      do_syscall_64+0xc6/0x1e0
[  504.568604][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.568604][   T72] 
[  504.570256][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  504.570560][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  504.570560][   T72]      netdev_get_by_index+0x5e/0x80
[  504.570560][   T72]      fib6_nh_init+0x3d8/0x15b0
[  504.570560][   T72]      ip6_route_info_create+0xf18/0x17d0
[  504.570560][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  504.570560][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  504.570560][   T72]      addrconf_join_anycast+0x1c0/0x220
[  504.570560][   T72]      dev_forward_change+0x2a6/0x7b0
[  504.570560][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  504.570560][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  504.570560][   T72]      proc_sys_call_handler+0x403/0x5e0
[  504.570560][   T72]      vfs_write+0x9e5/0x10a0
[  504.570560][   T72]      ksys_write+0xf5/0x1e0
[  504.570560][   T72]      do_syscall_64+0xc6/0x1e0
[  504.570560][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.570560][   T72] 
[  504.572487][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  504.572487][   T72]      netdev_get_by_index+0x5e/0x80
[  504.572487][   T72]      fib6_nh_init+0x3d8/0x15b0
[  504.572487][   T72]      ip6_route_info_create+0xf18/0x17d0
[  504.572487][   T72]      addrconf_f6i_alloc+0x244/0x410
[  504.572487][   T72]      ipv6_add_addr+0x411/0x2000
[  504.572487][   T72]      inet6_addr_add+0x30e/0xa40
[  504.572487][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  504.572487][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.572487][   T72]      netlink_rcv_skb+0x130/0x360
[  504.572487][   T72]      netlink_unicast+0x449/0x710
[  504.572487][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.572487][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.572487][   T72]      ___sys_sendmsg+0xee/0x170
[  504.572487][   T72]      __sys_sendmsg+0xcd/0x170
[  504.572487][   T72]      do_syscall_64+0xc6/0x1e0
[  504.572487][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.572487][   T72] 
[  504.574576][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  504.574576][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  504.574576][   T72]      ipv6_find_idev+0x102/0x170
[  504.574576][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  504.574576][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.574576][   T72]      netlink_rcv_skb+0x130/0x360
[  504.574576][   T72]      netlink_unicast+0x449/0x710
[  504.574576][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.574576][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.574576][   T72]      ___sys_sendmsg+0xee/0x170
[  504.574576][   T72]      __sys_sendmsg+0xcd/0x170
[  504.574576][   T72]      do_syscall_64+0xc6/0x1e0
[  504.574576][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.574576][   T72] 
[  504.576184][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  504.576184][   T72]      neigh_parms_alloc+0x1e5/0x510
[  504.576184][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  504.576184][   T72]      ipv6_find_idev+0x102/0x170
[  504.576184][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  504.576184][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  504.576184][   T72]      netlink_rcv_skb+0x130/0x360
[  504.576184][   T72]      netlink_unicast+0x449/0x710
[  504.576184][   T72]      netlink_sendmsg+0x723/0xbe0
[  504.576184][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  504.576184][   T72]      ___sys_sendmsg+0xee/0x170
[  504.576184][   T72]      __sys_sendmsg+0xcd/0x170
[  504.576184][   T72]      do_syscall_64+0xc6/0x1e0
[  504.576184][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.576184][   T72] 
[  504.577950][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  504.578209][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  504.578209][   T72]      dst_init+0x84/0x4a0
[  504.578209][   T72]      dst_alloc+0x97/0x150
[  504.578209][   T72]      ip6_dst_alloc+0x23/0x90
[  504.578209][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  504.578209][   T72]      ip6_pol_route+0x56f/0x840
[  504.578209][   T72]      fib6_rule_lookup+0x227/0x600
[  504.578209][   T72]      ip6_route_output_flags+0x251/0x460
[  504.578209][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  504.578209][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  504.578209][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  504.578209][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  504.578209][   T72]      ip6_datagram_connect+0x2c/0x50
[  504.578209][   T72]      __sys_connect+0x217/0x2a0
[  504.578209][   T72]      __x64_sys_connect+0x72/0xb0
[  504.578209][   T72]      do_syscall_64+0xc6/0x1e0
[  504.578209][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  504.578209][   T72] 
[  514.828649][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  514.829087][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  514.829087][   T72]      netdev_get_by_index+0x5e/0x80
[  514.829087][   T72]      fib6_nh_init+0x3d8/0x15b0
[  514.829087][   T72]      ip6_route_info_create+0xf18/0x17d0
[  514.829087][   T72]      addrconf_f6i_alloc+0x244/0x410
[  514.829087][   T72]      ipv6_add_addr+0x411/0x2000
[  514.829087][   T72]      inet6_addr_add+0x30e/0xa40
[  514.829087][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  514.829087][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.829087][   T72]      netlink_rcv_skb+0x130/0x360
[  514.829087][   T72]      netlink_unicast+0x449/0x710
[  514.829087][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.829087][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.829087][   T72]      ___sys_sendmsg+0xee/0x170
[  514.829087][   T72]      __sys_sendmsg+0xcd/0x170
[  514.829087][   T72]      do_syscall_64+0xc6/0x1e0
[  514.829087][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.829087][   T72] 
[  514.831164][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  514.831164][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  514.831164][   T72]      ipv6_find_idev+0x102/0x170
[  514.831164][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  514.831164][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.831164][   T72]      netlink_rcv_skb+0x130/0x360
[  514.831164][   T72]      netlink_unicast+0x449/0x710
[  514.831164][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.831164][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.831164][   T72]      ___sys_sendmsg+0xee/0x170
[  514.831164][   T72]      __sys_sendmsg+0xcd/0x170
[  514.831164][   T72]      do_syscall_64+0xc6/0x1e0
[  514.831164][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.831164][   T72] 
[  514.832682][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  514.832682][   T72]      neigh_parms_alloc+0x1e5/0x510
[  514.832682][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  514.832682][   T72]      ipv6_find_idev+0x102/0x170
[  514.832682][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  514.832682][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.832682][   T72]      netlink_rcv_skb+0x130/0x360
[  514.832682][   T72]      netlink_unicast+0x449/0x710
[  514.832682][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.832682][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.832682][   T72]      ___sys_sendmsg+0xee/0x170
[  514.832682][   T72]      __sys_sendmsg+0xcd/0x170
[  514.832682][   T72]      do_syscall_64+0xc6/0x1e0
[  514.832682][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.832682][   T72] 
[  514.834342][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  514.834638][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  514.834638][   T72]      netdev_get_by_index+0x5e/0x80
[  514.834638][   T72]      fib6_nh_init+0x3d8/0x15b0
[  514.834638][   T72]      ip6_route_info_create+0xf18/0x17d0
[  514.834638][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  514.834638][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  514.834638][   T72]      addrconf_join_anycast+0x1c0/0x220
[  514.834638][   T72]      dev_forward_change+0x2a6/0x7b0
[  514.834638][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  514.834638][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  514.834638][   T72]      proc_sys_call_handler+0x403/0x5e0
[  514.834638][   T72]      vfs_write+0x9e5/0x10a0
[  514.834638][   T72]      ksys_write+0xf5/0x1e0
[  514.834638][   T72]      do_syscall_64+0xc6/0x1e0
[  514.834638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.834638][   T72] 
[  514.836467][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  514.836467][   T72]      netdev_get_by_index+0x5e/0x80
[  514.836467][   T72]      fib6_nh_init+0x3d8/0x15b0
[  514.836467][   T72]      ip6_route_info_create+0xf18/0x17d0
[  514.836467][   T72]      addrconf_f6i_alloc+0x244/0x410
[  514.836467][   T72]      ipv6_add_addr+0x411/0x2000
[  514.836467][   T72]      inet6_addr_add+0x30e/0xa40
[  514.836467][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  514.836467][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.836467][   T72]      netlink_rcv_skb+0x130/0x360
[  514.836467][   T72]      netlink_unicast+0x449/0x710
[  514.836467][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.836467][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.836467][   T72]      ___sys_sendmsg+0xee/0x170
[  514.836467][   T72]      __sys_sendmsg+0xcd/0x170
[  514.836467][   T72]      do_syscall_64+0xc6/0x1e0
[  514.836467][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.836467][   T72] 
[  514.838465][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  514.838465][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  514.838465][   T72]      ipv6_find_idev+0x102/0x170
[  514.838465][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  514.838465][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.838465][   T72]      netlink_rcv_skb+0x130/0x360
[  514.838465][   T72]      netlink_unicast+0x449/0x710
[  514.838465][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.838465][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.838465][   T72]      ___sys_sendmsg+0xee/0x170
[  514.838465][   T72]      __sys_sendmsg+0xcd/0x170
[  514.838465][   T72]      do_syscall_64+0xc6/0x1e0
[  514.838465][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.838465][   T72] 
[  514.839973][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  514.839973][   T72]      neigh_parms_alloc+0x1e5/0x510
[  514.839973][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  514.839973][   T72]      ipv6_find_idev+0x102/0x170
[  514.839973][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  514.839973][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  514.839973][   T72]      netlink_rcv_skb+0x130/0x360
[  514.839973][   T72]      netlink_unicast+0x449/0x710
[  514.839973][   T72]      netlink_sendmsg+0x723/0xbe0
[  514.839973][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  514.839973][   T72]      ___sys_sendmsg+0xee/0x170
[  514.839973][   T72]      __sys_sendmsg+0xcd/0x170
[  514.839973][   T72]      do_syscall_64+0xc6/0x1e0
[  514.839973][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.839973][   T72] 
[  514.841640][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  514.841877][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  514.841877][   T72]      dst_init+0x84/0x4a0
[  514.841877][   T72]      dst_alloc+0x97/0x150
[  514.841877][   T72]      ip6_dst_alloc+0x23/0x90
[  514.841877][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  514.841877][   T72]      ip6_pol_route+0x56f/0x840
[  514.841877][   T72]      fib6_rule_lookup+0x227/0x600
[  514.841877][   T72]      ip6_route_output_flags+0x251/0x460
[  514.841877][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  514.841877][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  514.841877][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  514.841877][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  514.841877][   T72]      ip6_datagram_connect+0x2c/0x50
[  514.841877][   T72]      __sys_connect+0x217/0x2a0
[  514.841877][   T72]      __x64_sys_connect+0x72/0xb0
[  514.841877][   T72]      do_syscall_64+0xc6/0x1e0
[  514.841877][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  514.841877][   T72] 
[  525.092720][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  525.093172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  525.093172][   T72]      netdev_get_by_index+0x5e/0x80
[  525.093172][   T72]      fib6_nh_init+0x3d8/0x15b0
[  525.093172][   T72]      ip6_route_info_create+0xf18/0x17d0
[  525.093172][   T72]      addrconf_f6i_alloc+0x244/0x410
[  525.093172][   T72]      ipv6_add_addr+0x411/0x2000
[  525.093172][   T72]      inet6_addr_add+0x30e/0xa40
[  525.093172][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  525.093172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.093172][   T72]      netlink_rcv_skb+0x130/0x360
[  525.093172][   T72]      netlink_unicast+0x449/0x710
[  525.093172][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.093172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.093172][   T72]      ___sys_sendmsg+0xee/0x170
[  525.093172][   T72]      __sys_sendmsg+0xcd/0x170
[  525.093172][   T72]      do_syscall_64+0xc6/0x1e0
[  525.093172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.093172][   T72] 
[  525.095157][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  525.095157][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  525.095157][   T72]      ipv6_find_idev+0x102/0x170
[  525.095157][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  525.095157][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.095157][   T72]      netlink_rcv_skb+0x130/0x360
[  525.095157][   T72]      netlink_unicast+0x449/0x710
[  525.095157][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.095157][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.095157][   T72]      ___sys_sendmsg+0xee/0x170
[  525.095157][   T72]      __sys_sendmsg+0xcd/0x170
[  525.095157][   T72]      do_syscall_64+0xc6/0x1e0
[  525.095157][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.095157][   T72] 
[  525.096692][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  525.096692][   T72]      neigh_parms_alloc+0x1e5/0x510
[  525.096692][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  525.096692][   T72]      ipv6_find_idev+0x102/0x170
[  525.096692][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  525.096692][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.096692][   T72]      netlink_rcv_skb+0x130/0x360
[  525.096692][   T72]      netlink_unicast+0x449/0x710
[  525.096692][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.096692][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.096692][   T72]      ___sys_sendmsg+0xee/0x170
[  525.096692][   T72]      __sys_sendmsg+0xcd/0x170
[  525.096692][   T72]      do_syscall_64+0xc6/0x1e0
[  525.096692][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.096692][   T72] 
[  525.098388][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  525.098689][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  525.098689][   T72]      netdev_get_by_index+0x5e/0x80
[  525.098689][   T72]      fib6_nh_init+0x3d8/0x15b0
[  525.098689][   T72]      ip6_route_info_create+0xf18/0x17d0
[  525.098689][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  525.098689][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  525.098689][   T72]      addrconf_join_anycast+0x1c0/0x220
[  525.098689][   T72]      dev_forward_change+0x2a6/0x7b0
[  525.098689][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  525.098689][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  525.098689][   T72]      proc_sys_call_handler+0x403/0x5e0
[  525.098689][   T72]      vfs_write+0x9e5/0x10a0
[  525.098689][   T72]      ksys_write+0xf5/0x1e0
[  525.098689][   T72]      do_syscall_64+0xc6/0x1e0
[  525.098689][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.098689][   T72] 
[  525.100515][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  525.100515][   T72]      netdev_get_by_index+0x5e/0x80
[  525.100515][   T72]      fib6_nh_init+0x3d8/0x15b0
[  525.100515][   T72]      ip6_route_info_create+0xf18/0x17d0
[  525.100515][   T72]      addrconf_f6i_alloc+0x244/0x410
[  525.100515][   T72]      ipv6_add_addr+0x411/0x2000
[  525.100515][   T72]      inet6_addr_add+0x30e/0xa40
[  525.100515][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  525.100515][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.100515][   T72]      netlink_rcv_skb+0x130/0x360
[  525.100515][   T72]      netlink_unicast+0x449/0x710
[  525.100515][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.100515][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.100515][   T72]      ___sys_sendmsg+0xee/0x170
[  525.100515][   T72]      __sys_sendmsg+0xcd/0x170
[  525.100515][   T72]      do_syscall_64+0xc6/0x1e0
[  525.100515][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.100515][   T72] 
[  525.102471][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  525.102471][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  525.102471][   T72]      ipv6_find_idev+0x102/0x170
[  525.102471][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  525.102471][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.102471][   T72]      netlink_rcv_skb+0x130/0x360
[  525.102471][   T72]      netlink_unicast+0x449/0x710
[  525.102471][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.102471][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.102471][   T72]      ___sys_sendmsg+0xee/0x170
[  525.102471][   T72]      __sys_sendmsg+0xcd/0x170
[  525.102471][   T72]      do_syscall_64+0xc6/0x1e0
[  525.102471][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.102471][   T72] 
[  525.103991][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  525.103991][   T72]      neigh_parms_alloc+0x1e5/0x510
[  525.103991][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  525.103991][   T72]      ipv6_find_idev+0x102/0x170
[  525.103991][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  525.103991][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  525.103991][   T72]      netlink_rcv_skb+0x130/0x360
[  525.103991][   T72]      netlink_unicast+0x449/0x710
[  525.103991][   T72]      netlink_sendmsg+0x723/0xbe0
[  525.103991][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  525.103991][   T72]      ___sys_sendmsg+0xee/0x170
[  525.103991][   T72]      __sys_sendmsg+0xcd/0x170
[  525.103991][   T72]      do_syscall_64+0xc6/0x1e0
[  525.103991][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.103991][   T72] 
[  525.105647][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  525.105886][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  525.105886][   T72]      dst_init+0x84/0x4a0
[  525.105886][   T72]      dst_alloc+0x97/0x150
[  525.105886][   T72]      ip6_dst_alloc+0x23/0x90
[  525.105886][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  525.105886][   T72]      ip6_pol_route+0x56f/0x840
[  525.105886][   T72]      fib6_rule_lookup+0x227/0x600
[  525.105886][   T72]      ip6_route_output_flags+0x251/0x460
[  525.105886][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  525.105886][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  525.105886][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  525.105886][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  525.105886][   T72]      ip6_datagram_connect+0x2c/0x50
[  525.105886][   T72]      __sys_connect+0x217/0x2a0
[  525.105886][   T72]      __x64_sys_connect+0x72/0xb0
[  525.105886][   T72]      do_syscall_64+0xc6/0x1e0
[  525.105886][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  525.105886][   T72] 
[  535.188674][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  535.189159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  535.189159][   T72]      netdev_get_by_index+0x5e/0x80
[  535.189159][   T72]      fib6_nh_init+0x3d8/0x15b0
[  535.189159][   T72]      ip6_route_info_create+0xf18/0x17d0
[  535.189159][   T72]      addrconf_f6i_alloc+0x244/0x410
[  535.189159][   T72]      ipv6_add_addr+0x411/0x2000
[  535.189159][   T72]      inet6_addr_add+0x30e/0xa40
[  535.189159][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  535.189159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.189159][   T72]      netlink_rcv_skb+0x130/0x360
[  535.189159][   T72]      netlink_unicast+0x449/0x710
[  535.189159][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.189159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.189159][   T72]      ___sys_sendmsg+0xee/0x170
[  535.189159][   T72]      __sys_sendmsg+0xcd/0x170
[  535.189159][   T72]      do_syscall_64+0xc6/0x1e0
[  535.189159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.189159][   T72] 
[  535.191161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  535.191161][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  535.191161][   T72]      ipv6_find_idev+0x102/0x170
[  535.191161][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  535.191161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.191161][   T72]      netlink_rcv_skb+0x130/0x360
[  535.191161][   T72]      netlink_unicast+0x449/0x710
[  535.191161][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.191161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.191161][   T72]      ___sys_sendmsg+0xee/0x170
[  535.191161][   T72]      __sys_sendmsg+0xcd/0x170
[  535.191161][   T72]      do_syscall_64+0xc6/0x1e0
[  535.191161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.191161][   T72] 
[  535.192694][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  535.192694][   T72]      neigh_parms_alloc+0x1e5/0x510
[  535.192694][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  535.192694][   T72]      ipv6_find_idev+0x102/0x170
[  535.192694][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  535.192694][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.192694][   T72]      netlink_rcv_skb+0x130/0x360
[  535.192694][   T72]      netlink_unicast+0x449/0x710
[  535.192694][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.192694][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.192694][   T72]      ___sys_sendmsg+0xee/0x170
[  535.192694][   T72]      __sys_sendmsg+0xcd/0x170
[  535.192694][   T72]      do_syscall_64+0xc6/0x1e0
[  535.192694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.192694][   T72] 
[  535.194404][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  535.194694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  535.194694][   T72]      netdev_get_by_index+0x5e/0x80
[  535.194694][   T72]      fib6_nh_init+0x3d8/0x15b0
[  535.194694][   T72]      ip6_route_info_create+0xf18/0x17d0
[  535.194694][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  535.194694][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  535.194694][   T72]      addrconf_join_anycast+0x1c0/0x220
[  535.194694][   T72]      dev_forward_change+0x2a6/0x7b0
[  535.194694][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  535.194694][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  535.194694][   T72]      proc_sys_call_handler+0x403/0x5e0
[  535.194694][   T72]      vfs_write+0x9e5/0x10a0
[  535.194694][   T72]      ksys_write+0xf5/0x1e0
[  535.194694][   T72]      do_syscall_64+0xc6/0x1e0
[  535.194694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.194694][   T72] 
[  535.196532][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  535.196532][   T72]      netdev_get_by_index+0x5e/0x80
[  535.196532][   T72]      fib6_nh_init+0x3d8/0x15b0
[  535.196532][   T72]      ip6_route_info_create+0xf18/0x17d0
[  535.196532][   T72]      addrconf_f6i_alloc+0x244/0x410
[  535.196532][   T72]      ipv6_add_addr+0x411/0x2000
[  535.196532][   T72]      inet6_addr_add+0x30e/0xa40
[  535.196532][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  535.196532][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.196532][   T72]      netlink_rcv_skb+0x130/0x360
[  535.196532][   T72]      netlink_unicast+0x449/0x710
[  535.196532][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.196532][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.196532][   T72]      ___sys_sendmsg+0xee/0x170
[  535.196532][   T72]      __sys_sendmsg+0xcd/0x170
[  535.196532][   T72]      do_syscall_64+0xc6/0x1e0
[  535.196532][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.196532][   T72] 
[  535.198525][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  535.198525][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  535.198525][   T72]      ipv6_find_idev+0x102/0x170
[  535.198525][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  535.198525][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.198525][   T72]      netlink_rcv_skb+0x130/0x360
[  535.198525][   T72]      netlink_unicast+0x449/0x710
[  535.198525][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.198525][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.198525][   T72]      ___sys_sendmsg+0xee/0x170
[  535.198525][   T72]      __sys_sendmsg+0xcd/0x170
[  535.198525][   T72]      do_syscall_64+0xc6/0x1e0
[  535.198525][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.198525][   T72] 
[  535.200055][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  535.200055][   T72]      neigh_parms_alloc+0x1e5/0x510
[  535.200055][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  535.200055][   T72]      ipv6_find_idev+0x102/0x170
[  535.200055][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  535.200055][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  535.200055][   T72]      netlink_rcv_skb+0x130/0x360
[  535.200055][   T72]      netlink_unicast+0x449/0x710
[  535.200055][   T72]      netlink_sendmsg+0x723/0xbe0
[  535.200055][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  535.200055][   T72]      ___sys_sendmsg+0xee/0x170
[  535.200055][   T72]      __sys_sendmsg+0xcd/0x170
[  535.200055][   T72]      do_syscall_64+0xc6/0x1e0
[  535.200055][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.200055][   T72] 
[  535.201739][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  535.201982][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  535.201982][   T72]      dst_init+0x84/0x4a0
[  535.201982][   T72]      dst_alloc+0x97/0x150
[  535.201982][   T72]      ip6_dst_alloc+0x23/0x90
[  535.201982][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  535.201982][   T72]      ip6_pol_route+0x56f/0x840
[  535.201982][   T72]      fib6_rule_lookup+0x227/0x600
[  535.201982][   T72]      ip6_route_output_flags+0x251/0x460
[  535.201982][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  535.201982][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  535.201982][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  535.201982][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  535.201982][   T72]      ip6_datagram_connect+0x2c/0x50
[  535.201982][   T72]      __sys_connect+0x217/0x2a0
[  535.201982][   T72]      __x64_sys_connect+0x72/0xb0
[  535.201982][   T72]      do_syscall_64+0xc6/0x1e0
[  535.201982][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  535.201982][   T72] 
[  545.348639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  545.349042][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  545.349042][   T72]      netdev_get_by_index+0x5e/0x80
[  545.349042][   T72]      fib6_nh_init+0x3d8/0x15b0
[  545.349042][   T72]      ip6_route_info_create+0xf18/0x17d0
[  545.349042][   T72]      addrconf_f6i_alloc+0x244/0x410
[  545.349042][   T72]      ipv6_add_addr+0x411/0x2000
[  545.349042][   T72]      inet6_addr_add+0x30e/0xa40
[  545.349042][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  545.349042][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.349042][   T72]      netlink_rcv_skb+0x130/0x360
[  545.349042][   T72]      netlink_unicast+0x449/0x710
[  545.349042][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.349042][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.349042][   T72]      ___sys_sendmsg+0xee/0x170
[  545.349042][   T72]      __sys_sendmsg+0xcd/0x170
[  545.349042][   T72]      do_syscall_64+0xc6/0x1e0
[  545.349042][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.349042][   T72] 
[  545.351046][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  545.351046][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  545.351046][   T72]      ipv6_find_idev+0x102/0x170
[  545.351046][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  545.351046][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.351046][   T72]      netlink_rcv_skb+0x130/0x360
[  545.351046][   T72]      netlink_unicast+0x449/0x710
[  545.351046][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.351046][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.351046][   T72]      ___sys_sendmsg+0xee/0x170
[  545.351046][   T72]      __sys_sendmsg+0xcd/0x170
[  545.351046][   T72]      do_syscall_64+0xc6/0x1e0
[  545.351046][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.351046][   T72] 
[  545.352580][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  545.352580][   T72]      neigh_parms_alloc+0x1e5/0x510
[  545.352580][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  545.352580][   T72]      ipv6_find_idev+0x102/0x170
[  545.352580][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  545.352580][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.352580][   T72]      netlink_rcv_skb+0x130/0x360
[  545.352580][   T72]      netlink_unicast+0x449/0x710
[  545.352580][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.352580][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.352580][   T72]      ___sys_sendmsg+0xee/0x170
[  545.352580][   T72]      __sys_sendmsg+0xcd/0x170
[  545.352580][   T72]      do_syscall_64+0xc6/0x1e0
[  545.352580][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.352580][   T72] 
[  545.354333][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  545.354610][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  545.354610][   T72]      netdev_get_by_index+0x5e/0x80
[  545.354610][   T72]      fib6_nh_init+0x3d8/0x15b0
[  545.354610][   T72]      ip6_route_info_create+0xf18/0x17d0
[  545.354610][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  545.354610][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  545.354610][   T72]      addrconf_join_anycast+0x1c0/0x220
[  545.354610][   T72]      dev_forward_change+0x2a6/0x7b0
[  545.354610][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  545.354610][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  545.354610][   T72]      proc_sys_call_handler+0x403/0x5e0
[  545.354610][   T72]      vfs_write+0x9e5/0x10a0
[  545.354610][   T72]      ksys_write+0xf5/0x1e0
[  545.354610][   T72]      do_syscall_64+0xc6/0x1e0
[  545.354610][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.354610][   T72] 
[  545.356452][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  545.356452][   T72]      netdev_get_by_index+0x5e/0x80
[  545.356452][   T72]      fib6_nh_init+0x3d8/0x15b0
[  545.356452][   T72]      ip6_route_info_create+0xf18/0x17d0
[  545.356452][   T72]      addrconf_f6i_alloc+0x244/0x410
[  545.356452][   T72]      ipv6_add_addr+0x411/0x2000
[  545.356452][   T72]      inet6_addr_add+0x30e/0xa40
[  545.356452][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  545.356452][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.356452][   T72]      netlink_rcv_skb+0x130/0x360
[  545.356452][   T72]      netlink_unicast+0x449/0x710
[  545.356452][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.356452][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.356452][   T72]      ___sys_sendmsg+0xee/0x170
[  545.356452][   T72]      __sys_sendmsg+0xcd/0x170
[  545.356452][   T72]      do_syscall_64+0xc6/0x1e0
[  545.356452][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.356452][   T72] 
[  545.358438][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  545.358438][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  545.358438][   T72]      ipv6_find_idev+0x102/0x170
[  545.358438][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  545.358438][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.358438][   T72]      netlink_rcv_skb+0x130/0x360
[  545.358438][   T72]      netlink_unicast+0x449/0x710
[  545.358438][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.358438][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.358438][   T72]      ___sys_sendmsg+0xee/0x170
[  545.358438][   T72]      __sys_sendmsg+0xcd/0x170
[  545.358438][   T72]      do_syscall_64+0xc6/0x1e0
[  545.358438][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.358438][   T72] 
[  545.359978][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  545.359978][   T72]      neigh_parms_alloc+0x1e5/0x510
[  545.359978][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  545.359978][   T72]      ipv6_find_idev+0x102/0x170
[  545.359978][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  545.359978][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  545.359978][   T72]      netlink_rcv_skb+0x130/0x360
[  545.359978][   T72]      netlink_unicast+0x449/0x710
[  545.359978][   T72]      netlink_sendmsg+0x723/0xbe0
[  545.359978][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  545.359978][   T72]      ___sys_sendmsg+0xee/0x170
[  545.359978][   T72]      __sys_sendmsg+0xcd/0x170
[  545.359978][   T72]      do_syscall_64+0xc6/0x1e0
[  545.359978][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.359978][   T72] 
[  545.361659][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  545.361900][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  545.361900][   T72]      dst_init+0x84/0x4a0
[  545.361900][   T72]      dst_alloc+0x97/0x150
[  545.361900][   T72]      ip6_dst_alloc+0x23/0x90
[  545.361900][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  545.361900][   T72]      ip6_pol_route+0x56f/0x840
[  545.361900][   T72]      fib6_rule_lookup+0x227/0x600
[  545.361900][   T72]      ip6_route_output_flags+0x251/0x460
[  545.361900][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  545.361900][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  545.361900][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  545.361900][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  545.361900][   T72]      ip6_datagram_connect+0x2c/0x50
[  545.361900][   T72]      __sys_connect+0x217/0x2a0
[  545.361900][   T72]      __x64_sys_connect+0x72/0xb0
[  545.361900][   T72]      do_syscall_64+0xc6/0x1e0
[  545.361900][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  545.361900][   T72] 
[  555.604715][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  555.605106][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  555.605106][   T72]      netdev_get_by_index+0x5e/0x80
[  555.605106][   T72]      fib6_nh_init+0x3d8/0x15b0
[  555.605106][   T72]      ip6_route_info_create+0xf18/0x17d0
[  555.605106][   T72]      addrconf_f6i_alloc+0x244/0x410
[  555.605106][   T72]      ipv6_add_addr+0x411/0x2000
[  555.605106][   T72]      inet6_addr_add+0x30e/0xa40
[  555.605106][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  555.605106][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.605106][   T72]      netlink_rcv_skb+0x130/0x360
[  555.605106][   T72]      netlink_unicast+0x449/0x710
[  555.605106][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.605106][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.605106][   T72]      ___sys_sendmsg+0xee/0x170
[  555.605106][   T72]      __sys_sendmsg+0xcd/0x170
[  555.605106][   T72]      do_syscall_64+0xc6/0x1e0
[  555.605106][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.605106][   T72] 
[  555.607127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  555.607127][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  555.607127][   T72]      ipv6_find_idev+0x102/0x170
[  555.607127][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  555.607127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.607127][   T72]      netlink_rcv_skb+0x130/0x360
[  555.607127][   T72]      netlink_unicast+0x449/0x710
[  555.607127][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.607127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.607127][   T72]      ___sys_sendmsg+0xee/0x170
[  555.607127][   T72]      __sys_sendmsg+0xcd/0x170
[  555.607127][   T72]      do_syscall_64+0xc6/0x1e0
[  555.607127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.607127][   T72] 
[  555.608771][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  555.608771][   T72]      neigh_parms_alloc+0x1e5/0x510
[  555.608771][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  555.608771][   T72]      ipv6_find_idev+0x102/0x170
[  555.608771][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  555.608771][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.608771][   T72]      netlink_rcv_skb+0x130/0x360
[  555.608771][   T72]      netlink_unicast+0x449/0x710
[  555.608771][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.608771][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.608771][   T72]      ___sys_sendmsg+0xee/0x170
[  555.608771][   T72]      __sys_sendmsg+0xcd/0x170
[  555.608771][   T72]      do_syscall_64+0xc6/0x1e0
[  555.608771][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.608771][   T72] 
[  555.610463][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  555.610755][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  555.610755][   T72]      netdev_get_by_index+0x5e/0x80
[  555.610755][   T72]      fib6_nh_init+0x3d8/0x15b0
[  555.610755][   T72]      ip6_route_info_create+0xf18/0x17d0
[  555.610755][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  555.610755][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  555.610755][   T72]      addrconf_join_anycast+0x1c0/0x220
[  555.610755][   T72]      dev_forward_change+0x2a6/0x7b0
[  555.610755][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  555.610755][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  555.610755][   T72]      proc_sys_call_handler+0x403/0x5e0
[  555.610755][   T72]      vfs_write+0x9e5/0x10a0
[  555.610755][   T72]      ksys_write+0xf5/0x1e0
[  555.610755][   T72]      do_syscall_64+0xc6/0x1e0
[  555.610755][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.610755][   T72] 
[  555.612593][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  555.612593][   T72]      netdev_get_by_index+0x5e/0x80
[  555.612593][   T72]      fib6_nh_init+0x3d8/0x15b0
[  555.612593][   T72]      ip6_route_info_create+0xf18/0x17d0
[  555.612593][   T72]      addrconf_f6i_alloc+0x244/0x410
[  555.612593][   T72]      ipv6_add_addr+0x411/0x2000
[  555.612593][   T72]      inet6_addr_add+0x30e/0xa40
[  555.612593][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  555.612593][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.612593][   T72]      netlink_rcv_skb+0x130/0x360
[  555.612593][   T72]      netlink_unicast+0x449/0x710
[  555.612593][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.612593][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.612593][   T72]      ___sys_sendmsg+0xee/0x170
[  555.612593][   T72]      __sys_sendmsg+0xcd/0x170
[  555.612593][   T72]      do_syscall_64+0xc6/0x1e0
[  555.612593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.612593][   T72] 
[  555.614572][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  555.614572][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  555.614572][   T72]      ipv6_find_idev+0x102/0x170
[  555.614572][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  555.614572][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.614572][   T72]      netlink_rcv_skb+0x130/0x360
[  555.614572][   T72]      netlink_unicast+0x449/0x710
[  555.614572][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.614572][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.614572][   T72]      ___sys_sendmsg+0xee/0x170
[  555.614572][   T72]      __sys_sendmsg+0xcd/0x170
[  555.614572][   T72]      do_syscall_64+0xc6/0x1e0
[  555.614572][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.614572][   T72] 
[  555.616098][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  555.616098][   T72]      neigh_parms_alloc+0x1e5/0x510
[  555.616098][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  555.616098][   T72]      ipv6_find_idev+0x102/0x170
[  555.616098][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  555.616098][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  555.616098][   T72]      netlink_rcv_skb+0x130/0x360
[  555.616098][   T72]      netlink_unicast+0x449/0x710
[  555.616098][   T72]      netlink_sendmsg+0x723/0xbe0
[  555.616098][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  555.616098][   T72]      ___sys_sendmsg+0xee/0x170
[  555.616098][   T72]      __sys_sendmsg+0xcd/0x170
[  555.616098][   T72]      do_syscall_64+0xc6/0x1e0
[  555.616098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.616098][   T72] 
[  555.617785][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  555.618028][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  555.618028][   T72]      dst_init+0x84/0x4a0
[  555.618028][   T72]      dst_alloc+0x97/0x150
[  555.618028][   T72]      ip6_dst_alloc+0x23/0x90
[  555.618028][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  555.618028][   T72]      ip6_pol_route+0x56f/0x840
[  555.618028][   T72]      fib6_rule_lookup+0x227/0x600
[  555.618028][   T72]      ip6_route_output_flags+0x251/0x460
[  555.618028][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  555.618028][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  555.618028][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  555.618028][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  555.618028][   T72]      ip6_datagram_connect+0x2c/0x50
[  555.618028][   T72]      __sys_connect+0x217/0x2a0
[  555.618028][   T72]      __x64_sys_connect+0x72/0xb0
[  555.618028][   T72]      do_syscall_64+0xc6/0x1e0
[  555.618028][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  555.618028][   T72] 
[  565.860650][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  565.861117][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  565.861117][   T72]      netdev_get_by_index+0x5e/0x80
[  565.861117][   T72]      fib6_nh_init+0x3d8/0x15b0
[  565.861117][   T72]      ip6_route_info_create+0xf18/0x17d0
[  565.861117][   T72]      addrconf_f6i_alloc+0x244/0x410
[  565.861117][   T72]      ipv6_add_addr+0x411/0x2000
[  565.861117][   T72]      inet6_addr_add+0x30e/0xa40
[  565.861117][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  565.861117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.861117][   T72]      netlink_rcv_skb+0x130/0x360
[  565.861117][   T72]      netlink_unicast+0x449/0x710
[  565.861117][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.861117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.861117][   T72]      ___sys_sendmsg+0xee/0x170
[  565.861117][   T72]      __sys_sendmsg+0xcd/0x170
[  565.861117][   T72]      do_syscall_64+0xc6/0x1e0
[  565.861117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.861117][   T72] 
[  565.863112][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  565.863112][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  565.863112][   T72]      ipv6_find_idev+0x102/0x170
[  565.863112][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  565.863112][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.863112][   T72]      netlink_rcv_skb+0x130/0x360
[  565.863112][   T72]      netlink_unicast+0x449/0x710
[  565.863112][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.863112][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.863112][   T72]      ___sys_sendmsg+0xee/0x170
[  565.863112][   T72]      __sys_sendmsg+0xcd/0x170
[  565.863112][   T72]      do_syscall_64+0xc6/0x1e0
[  565.863112][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.863112][   T72] 
[  565.864642][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  565.864642][   T72]      neigh_parms_alloc+0x1e5/0x510
[  565.864642][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  565.864642][   T72]      ipv6_find_idev+0x102/0x170
[  565.864642][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  565.864642][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.864642][   T72]      netlink_rcv_skb+0x130/0x360
[  565.864642][   T72]      netlink_unicast+0x449/0x710
[  565.864642][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.864642][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.864642][   T72]      ___sys_sendmsg+0xee/0x170
[  565.864642][   T72]      __sys_sendmsg+0xcd/0x170
[  565.864642][   T72]      do_syscall_64+0xc6/0x1e0
[  565.864642][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.864642][   T72] 
[  565.866330][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  565.866603][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  565.866603][   T72]      netdev_get_by_index+0x5e/0x80
[  565.866603][   T72]      fib6_nh_init+0x3d8/0x15b0
[  565.866603][   T72]      ip6_route_info_create+0xf18/0x17d0
[  565.866603][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  565.866603][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  565.866603][   T72]      addrconf_join_anycast+0x1c0/0x220
[  565.866603][   T72]      dev_forward_change+0x2a6/0x7b0
[  565.866603][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  565.866603][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  565.866603][   T72]      proc_sys_call_handler+0x403/0x5e0
[  565.866603][   T72]      vfs_write+0x9e5/0x10a0
[  565.866603][   T72]      ksys_write+0xf5/0x1e0
[  565.866603][   T72]      do_syscall_64+0xc6/0x1e0
[  565.866603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.866603][   T72] 
[  565.868449][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  565.868449][   T72]      netdev_get_by_index+0x5e/0x80
[  565.868449][   T72]      fib6_nh_init+0x3d8/0x15b0
[  565.868449][   T72]      ip6_route_info_create+0xf18/0x17d0
[  565.868449][   T72]      addrconf_f6i_alloc+0x244/0x410
[  565.868449][   T72]      ipv6_add_addr+0x411/0x2000
[  565.868449][   T72]      inet6_addr_add+0x30e/0xa40
[  565.868449][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  565.868449][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.868449][   T72]      netlink_rcv_skb+0x130/0x360
[  565.868449][   T72]      netlink_unicast+0x449/0x710
[  565.868449][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.868449][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.868449][   T72]      ___sys_sendmsg+0xee/0x170
[  565.868449][   T72]      __sys_sendmsg+0xcd/0x170
[  565.868449][   T72]      do_syscall_64+0xc6/0x1e0
[  565.868449][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.868449][   T72] 
[  565.870419][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  565.870419][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  565.870419][   T72]      ipv6_find_idev+0x102/0x170
[  565.870419][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  565.870419][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.870419][   T72]      netlink_rcv_skb+0x130/0x360
[  565.870419][   T72]      netlink_unicast+0x449/0x710
[  565.870419][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.870419][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.870419][   T72]      ___sys_sendmsg+0xee/0x170
[  565.870419][   T72]      __sys_sendmsg+0xcd/0x170
[  565.870419][   T72]      do_syscall_64+0xc6/0x1e0
[  565.870419][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.870419][   T72] 
[  565.871942][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  565.871942][   T72]      neigh_parms_alloc+0x1e5/0x510
[  565.871942][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  565.871942][   T72]      ipv6_find_idev+0x102/0x170
[  565.871942][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  565.871942][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  565.871942][   T72]      netlink_rcv_skb+0x130/0x360
[  565.871942][   T72]      netlink_unicast+0x449/0x710
[  565.871942][   T72]      netlink_sendmsg+0x723/0xbe0
[  565.871942][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  565.871942][   T72]      ___sys_sendmsg+0xee/0x170
[  565.871942][   T72]      __sys_sendmsg+0xcd/0x170
[  565.871942][   T72]      do_syscall_64+0xc6/0x1e0
[  565.871942][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.871942][   T72] 
[  565.873618][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  565.873857][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  565.873857][   T72]      dst_init+0x84/0x4a0
[  565.873857][   T72]      dst_alloc+0x97/0x150
[  565.873857][   T72]      ip6_dst_alloc+0x23/0x90
[  565.873857][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  565.873857][   T72]      ip6_pol_route+0x56f/0x840
[  565.873857][   T72]      fib6_rule_lookup+0x227/0x600
[  565.873857][   T72]      ip6_route_output_flags+0x251/0x460
[  565.873857][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  565.873857][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  565.873857][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  565.873857][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  565.873857][   T72]      ip6_datagram_connect+0x2c/0x50
[  565.873857][   T72]      __sys_connect+0x217/0x2a0
[  565.873857][   T72]      __x64_sys_connect+0x72/0xb0
[  565.873857][   T72]      do_syscall_64+0xc6/0x1e0
[  565.873857][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  565.873857][   T72] 
[  575.964653][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  575.965037][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  575.965037][   T72]      netdev_get_by_index+0x5e/0x80
[  575.965037][   T72]      fib6_nh_init+0x3d8/0x15b0
[  575.965037][   T72]      ip6_route_info_create+0xf18/0x17d0
[  575.965037][   T72]      addrconf_f6i_alloc+0x244/0x410
[  575.965037][   T72]      ipv6_add_addr+0x411/0x2000
[  575.965037][   T72]      inet6_addr_add+0x30e/0xa40
[  575.965037][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  575.965037][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.965037][   T72]      netlink_rcv_skb+0x130/0x360
[  575.965037][   T72]      netlink_unicast+0x449/0x710
[  575.965037][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.965037][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.965037][   T72]      ___sys_sendmsg+0xee/0x170
[  575.965037][   T72]      __sys_sendmsg+0xcd/0x170
[  575.965037][   T72]      do_syscall_64+0xc6/0x1e0
[  575.965037][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.965037][   T72] 
[  575.967011][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  575.967011][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  575.967011][   T72]      ipv6_find_idev+0x102/0x170
[  575.967011][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  575.967011][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.967011][   T72]      netlink_rcv_skb+0x130/0x360
[  575.967011][   T72]      netlink_unicast+0x449/0x710
[  575.967011][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.967011][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.967011][   T72]      ___sys_sendmsg+0xee/0x170
[  575.967011][   T72]      __sys_sendmsg+0xcd/0x170
[  575.967011][   T72]      do_syscall_64+0xc6/0x1e0
[  575.967011][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.967011][   T72] 
[  575.968528][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  575.968528][   T72]      neigh_parms_alloc+0x1e5/0x510
[  575.968528][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  575.968528][   T72]      ipv6_find_idev+0x102/0x170
[  575.968528][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  575.968528][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.968528][   T72]      netlink_rcv_skb+0x130/0x360
[  575.968528][   T72]      netlink_unicast+0x449/0x710
[  575.968528][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.968528][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.968528][   T72]      ___sys_sendmsg+0xee/0x170
[  575.968528][   T72]      __sys_sendmsg+0xcd/0x170
[  575.968528][   T72]      do_syscall_64+0xc6/0x1e0
[  575.968528][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.968528][   T72] 
[  575.970179][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  575.970446][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  575.970446][   T72]      netdev_get_by_index+0x5e/0x80
[  575.970446][   T72]      fib6_nh_init+0x3d8/0x15b0
[  575.970446][   T72]      ip6_route_info_create+0xf18/0x17d0
[  575.970446][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  575.970446][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  575.970446][   T72]      addrconf_join_anycast+0x1c0/0x220
[  575.970446][   T72]      dev_forward_change+0x2a6/0x7b0
[  575.970446][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  575.970446][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  575.970446][   T72]      proc_sys_call_handler+0x403/0x5e0
[  575.970446][   T72]      vfs_write+0x9e5/0x10a0
[  575.970446][   T72]      ksys_write+0xf5/0x1e0
[  575.970446][   T72]      do_syscall_64+0xc6/0x1e0
[  575.970446][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.970446][   T72] 
[  575.972408][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  575.972408][   T72]      netdev_get_by_index+0x5e/0x80
[  575.972408][   T72]      fib6_nh_init+0x3d8/0x15b0
[  575.972408][   T72]      ip6_route_info_create+0xf18/0x17d0
[  575.972408][   T72]      addrconf_f6i_alloc+0x244/0x410
[  575.972408][   T72]      ipv6_add_addr+0x411/0x2000
[  575.972408][   T72]      inet6_addr_add+0x30e/0xa40
[  575.972408][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  575.972408][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.972408][   T72]      netlink_rcv_skb+0x130/0x360
[  575.972408][   T72]      netlink_unicast+0x449/0x710
[  575.972408][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.972408][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.972408][   T72]      ___sys_sendmsg+0xee/0x170
[  575.972408][   T72]      __sys_sendmsg+0xcd/0x170
[  575.972408][   T72]      do_syscall_64+0xc6/0x1e0
[  575.972408][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.972408][   T72] 
[  575.974370][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  575.974370][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  575.974370][   T72]      ipv6_find_idev+0x102/0x170
[  575.974370][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  575.974370][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.974370][   T72]      netlink_rcv_skb+0x130/0x360
[  575.974370][   T72]      netlink_unicast+0x449/0x710
[  575.974370][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.974370][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.974370][   T72]      ___sys_sendmsg+0xee/0x170
[  575.974370][   T72]      __sys_sendmsg+0xcd/0x170
[  575.974370][   T72]      do_syscall_64+0xc6/0x1e0
[  575.974370][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.974370][   T72] 
[  575.975879][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  575.975879][   T72]      neigh_parms_alloc+0x1e5/0x510
[  575.975879][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  575.975879][   T72]      ipv6_find_idev+0x102/0x170
[  575.975879][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  575.975879][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  575.975879][   T72]      netlink_rcv_skb+0x130/0x360
[  575.975879][   T72]      netlink_unicast+0x449/0x710
[  575.975879][   T72]      netlink_sendmsg+0x723/0xbe0
[  575.975879][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  575.975879][   T72]      ___sys_sendmsg+0xee/0x170
[  575.975879][   T72]      __sys_sendmsg+0xcd/0x170
[  575.975879][   T72]      do_syscall_64+0xc6/0x1e0
[  575.975879][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.975879][   T72] 
[  575.977541][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  575.977793][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  575.977793][   T72]      dst_init+0x84/0x4a0
[  575.977793][   T72]      dst_alloc+0x97/0x150
[  575.977793][   T72]      ip6_dst_alloc+0x23/0x90
[  575.977793][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  575.977793][   T72]      ip6_pol_route+0x56f/0x840
[  575.977793][   T72]      fib6_rule_lookup+0x227/0x600
[  575.977793][   T72]      ip6_route_output_flags+0x251/0x460
[  575.977793][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  575.977793][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  575.977793][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  575.977793][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  575.977793][   T72]      ip6_datagram_connect+0x2c/0x50
[  575.977793][   T72]      __sys_connect+0x217/0x2a0
[  575.977793][   T72]      __x64_sys_connect+0x72/0xb0
[  575.977793][   T72]      do_syscall_64+0xc6/0x1e0
[  575.977793][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  575.977793][   T72] 
[  586.220753][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  586.221216][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  586.221216][   T72]      netdev_get_by_index+0x5e/0x80
[  586.221216][   T72]      fib6_nh_init+0x3d8/0x15b0
[  586.221216][   T72]      ip6_route_info_create+0xf18/0x17d0
[  586.221216][   T72]      addrconf_f6i_alloc+0x244/0x410
[  586.221216][   T72]      ipv6_add_addr+0x411/0x2000
[  586.221216][   T72]      inet6_addr_add+0x30e/0xa40
[  586.221216][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  586.221216][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.221216][   T72]      netlink_rcv_skb+0x130/0x360
[  586.221216][   T72]      netlink_unicast+0x449/0x710
[  586.221216][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.221216][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.221216][   T72]      ___sys_sendmsg+0xee/0x170
[  586.221216][   T72]      __sys_sendmsg+0xcd/0x170
[  586.221216][   T72]      do_syscall_64+0xc6/0x1e0
[  586.221216][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.221216][   T72] 
[  586.223220][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  586.223220][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  586.223220][   T72]      ipv6_find_idev+0x102/0x170
[  586.223220][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  586.223220][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.223220][   T72]      netlink_rcv_skb+0x130/0x360
[  586.223220][   T72]      netlink_unicast+0x449/0x710
[  586.223220][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.223220][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.223220][   T72]      ___sys_sendmsg+0xee/0x170
[  586.223220][   T72]      __sys_sendmsg+0xcd/0x170
[  586.223220][   T72]      do_syscall_64+0xc6/0x1e0
[  586.223220][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.223220][   T72] 
[  586.224756][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  586.224756][   T72]      neigh_parms_alloc+0x1e5/0x510
[  586.224756][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  586.224756][   T72]      ipv6_find_idev+0x102/0x170
[  586.224756][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  586.224756][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.224756][   T72]      netlink_rcv_skb+0x130/0x360
[  586.224756][   T72]      netlink_unicast+0x449/0x710
[  586.224756][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.224756][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.224756][   T72]      ___sys_sendmsg+0xee/0x170
[  586.224756][   T72]      __sys_sendmsg+0xcd/0x170
[  586.224756][   T72]      do_syscall_64+0xc6/0x1e0
[  586.224756][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.224756][   T72] 
[  586.226456][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  586.226743][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  586.226743][   T72]      netdev_get_by_index+0x5e/0x80
[  586.226743][   T72]      fib6_nh_init+0x3d8/0x15b0
[  586.226743][   T72]      ip6_route_info_create+0xf18/0x17d0
[  586.226743][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  586.226743][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  586.226743][   T72]      addrconf_join_anycast+0x1c0/0x220
[  586.226743][   T72]      dev_forward_change+0x2a6/0x7b0
[  586.226743][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  586.226743][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  586.226743][   T72]      proc_sys_call_handler+0x403/0x5e0
[  586.226743][   T72]      vfs_write+0x9e5/0x10a0
[  586.226743][   T72]      ksys_write+0xf5/0x1e0
[  586.226743][   T72]      do_syscall_64+0xc6/0x1e0
[  586.226743][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.226743][   T72] 
[  586.228593][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  586.228593][   T72]      netdev_get_by_index+0x5e/0x80
[  586.228593][   T72]      fib6_nh_init+0x3d8/0x15b0
[  586.228593][   T72]      ip6_route_info_create+0xf18/0x17d0
[  586.228593][   T72]      addrconf_f6i_alloc+0x244/0x410
[  586.228593][   T72]      ipv6_add_addr+0x411/0x2000
[  586.228593][   T72]      inet6_addr_add+0x30e/0xa40
[  586.228593][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  586.228593][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.228593][   T72]      netlink_rcv_skb+0x130/0x360
[  586.228593][   T72]      netlink_unicast+0x449/0x710
[  586.228593][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.228593][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.228593][   T72]      ___sys_sendmsg+0xee/0x170
[  586.228593][   T72]      __sys_sendmsg+0xcd/0x170
[  586.228593][   T72]      do_syscall_64+0xc6/0x1e0
[  586.228593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.228593][   T72] 
[  586.230585][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  586.230585][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  586.230585][   T72]      ipv6_find_idev+0x102/0x170
[  586.230585][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  586.230585][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.230585][   T72]      netlink_rcv_skb+0x130/0x360
[  586.230585][   T72]      netlink_unicast+0x449/0x710
[  586.230585][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.230585][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.230585][   T72]      ___sys_sendmsg+0xee/0x170
[  586.230585][   T72]      __sys_sendmsg+0xcd/0x170
[  586.230585][   T72]      do_syscall_64+0xc6/0x1e0
[  586.230585][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.230585][   T72] 
[  586.232123][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  586.232123][   T72]      neigh_parms_alloc+0x1e5/0x510
[  586.232123][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  586.232123][   T72]      ipv6_find_idev+0x102/0x170
[  586.232123][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  586.232123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  586.232123][   T72]      netlink_rcv_skb+0x130/0x360
[  586.232123][   T72]      netlink_unicast+0x449/0x710
[  586.232123][   T72]      netlink_sendmsg+0x723/0xbe0
[  586.232123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  586.232123][   T72]      ___sys_sendmsg+0xee/0x170
[  586.232123][   T72]      __sys_sendmsg+0xcd/0x170
[  586.232123][   T72]      do_syscall_64+0xc6/0x1e0
[  586.232123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.232123][   T72] 
[  586.233808][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  586.234055][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  586.234055][   T72]      dst_init+0x84/0x4a0
[  586.234055][   T72]      dst_alloc+0x97/0x150
[  586.234055][   T72]      ip6_dst_alloc+0x23/0x90
[  586.234055][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  586.234055][   T72]      ip6_pol_route+0x56f/0x840
[  586.234055][   T72]      fib6_rule_lookup+0x227/0x600
[  586.234055][   T72]      ip6_route_output_flags+0x251/0x460
[  586.234055][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  586.234055][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  586.234055][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  586.234055][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  586.234055][   T72]      ip6_datagram_connect+0x2c/0x50
[  586.234055][   T72]      __sys_connect+0x217/0x2a0
[  586.234055][   T72]      __x64_sys_connect+0x72/0xb0
[  586.234055][   T72]      do_syscall_64+0xc6/0x1e0
[  586.234055][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  586.234055][   T72] 
[  596.476741][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  596.477139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  596.477139][   T72]      netdev_get_by_index+0x5e/0x80
[  596.477139][   T72]      fib6_nh_init+0x3d8/0x15b0
[  596.477139][   T72]      ip6_route_info_create+0xf18/0x17d0
[  596.477139][   T72]      addrconf_f6i_alloc+0x244/0x410
[  596.477139][   T72]      ipv6_add_addr+0x411/0x2000
[  596.477139][   T72]      inet6_addr_add+0x30e/0xa40
[  596.477139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  596.477139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.477139][   T72]      netlink_rcv_skb+0x130/0x360
[  596.477139][   T72]      netlink_unicast+0x449/0x710
[  596.477139][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.477139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.477139][   T72]      ___sys_sendmsg+0xee/0x170
[  596.477139][   T72]      __sys_sendmsg+0xcd/0x170
[  596.477139][   T72]      do_syscall_64+0xc6/0x1e0
[  596.477139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.477139][   T72] 
[  596.479171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  596.479171][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  596.479171][   T72]      ipv6_find_idev+0x102/0x170
[  596.479171][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  596.479171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.479171][   T72]      netlink_rcv_skb+0x130/0x360
[  596.479171][   T72]      netlink_unicast+0x449/0x710
[  596.479171][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.479171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.479171][   T72]      ___sys_sendmsg+0xee/0x170
[  596.479171][   T72]      __sys_sendmsg+0xcd/0x170
[  596.479171][   T72]      do_syscall_64+0xc6/0x1e0
[  596.479171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.479171][   T72] 
[  596.480709][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  596.480709][   T72]      neigh_parms_alloc+0x1e5/0x510
[  596.480709][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  596.480709][   T72]      ipv6_find_idev+0x102/0x170
[  596.480709][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  596.480709][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.480709][   T72]      netlink_rcv_skb+0x130/0x360
[  596.480709][   T72]      netlink_unicast+0x449/0x710
[  596.480709][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.480709][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.480709][   T72]      ___sys_sendmsg+0xee/0x170
[  596.480709][   T72]      __sys_sendmsg+0xcd/0x170
[  596.480709][   T72]      do_syscall_64+0xc6/0x1e0
[  596.480709][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.480709][   T72] 
[  596.482567][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  596.482856][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  596.482856][   T72]      netdev_get_by_index+0x5e/0x80
[  596.482856][   T72]      fib6_nh_init+0x3d8/0x15b0
[  596.482856][   T72]      ip6_route_info_create+0xf18/0x17d0
[  596.482856][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  596.482856][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  596.482856][   T72]      addrconf_join_anycast+0x1c0/0x220
[  596.482856][   T72]      dev_forward_change+0x2a6/0x7b0
[  596.482856][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  596.482856][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  596.482856][   T72]      proc_sys_call_handler+0x403/0x5e0
[  596.482856][   T72]      vfs_write+0x9e5/0x10a0
[  596.482856][   T72]      ksys_write+0xf5/0x1e0
[  596.482856][   T72]      do_syscall_64+0xc6/0x1e0
[  596.482856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.482856][   T72] 
[  596.484696][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  596.484696][   T72]      netdev_get_by_index+0x5e/0x80
[  596.484696][   T72]      fib6_nh_init+0x3d8/0x15b0
[  596.484696][   T72]      ip6_route_info_create+0xf18/0x17d0
[  596.484696][   T72]      addrconf_f6i_alloc+0x244/0x410
[  596.484696][   T72]      ipv6_add_addr+0x411/0x2000
[  596.484696][   T72]      inet6_addr_add+0x30e/0xa40
[  596.484696][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  596.484696][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.484696][   T72]      netlink_rcv_skb+0x130/0x360
[  596.484696][   T72]      netlink_unicast+0x449/0x710
[  596.484696][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.484696][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.484696][   T72]      ___sys_sendmsg+0xee/0x170
[  596.484696][   T72]      __sys_sendmsg+0xcd/0x170
[  596.484696][   T72]      do_syscall_64+0xc6/0x1e0
[  596.484696][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.484696][   T72] 
[  596.486688][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  596.486688][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  596.486688][   T72]      ipv6_find_idev+0x102/0x170
[  596.486688][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  596.486688][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.486688][   T72]      netlink_rcv_skb+0x130/0x360
[  596.486688][   T72]      netlink_unicast+0x449/0x710
[  596.486688][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.486688][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.486688][   T72]      ___sys_sendmsg+0xee/0x170
[  596.486688][   T72]      __sys_sendmsg+0xcd/0x170
[  596.486688][   T72]      do_syscall_64+0xc6/0x1e0
[  596.486688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.486688][   T72] 
[  596.488222][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  596.488222][   T72]      neigh_parms_alloc+0x1e5/0x510
[  596.488222][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  596.488222][   T72]      ipv6_find_idev+0x102/0x170
[  596.488222][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  596.488222][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  596.488222][   T72]      netlink_rcv_skb+0x130/0x360
[  596.488222][   T72]      netlink_unicast+0x449/0x710
[  596.488222][   T72]      netlink_sendmsg+0x723/0xbe0
[  596.488222][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  596.488222][   T72]      ___sys_sendmsg+0xee/0x170
[  596.488222][   T72]      __sys_sendmsg+0xcd/0x170
[  596.488222][   T72]      do_syscall_64+0xc6/0x1e0
[  596.488222][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.488222][   T72] 
[  596.489904][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  596.490148][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  596.490148][   T72]      dst_init+0x84/0x4a0
[  596.490148][   T72]      dst_alloc+0x97/0x150
[  596.490148][   T72]      ip6_dst_alloc+0x23/0x90
[  596.490148][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  596.490148][   T72]      ip6_pol_route+0x56f/0x840
[  596.490148][   T72]      fib6_rule_lookup+0x227/0x600
[  596.490148][   T72]      ip6_route_output_flags+0x251/0x460
[  596.490148][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  596.490148][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  596.490148][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  596.490148][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  596.490148][   T72]      ip6_datagram_connect+0x2c/0x50
[  596.490148][   T72]      __sys_connect+0x217/0x2a0
[  596.490148][   T72]      __x64_sys_connect+0x72/0xb0
[  596.490148][   T72]      do_syscall_64+0xc6/0x1e0
[  596.490148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  596.490148][   T72] 
[  606.732733][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  606.733125][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  606.733125][   T72]      netdev_get_by_index+0x5e/0x80
[  606.733125][   T72]      fib6_nh_init+0x3d8/0x15b0
[  606.733125][   T72]      ip6_route_info_create+0xf18/0x17d0
[  606.733125][   T72]      addrconf_f6i_alloc+0x244/0x410
[  606.733125][   T72]      ipv6_add_addr+0x411/0x2000
[  606.733125][   T72]      inet6_addr_add+0x30e/0xa40
[  606.733125][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  606.733125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.733125][   T72]      netlink_rcv_skb+0x130/0x360
[  606.733125][   T72]      netlink_unicast+0x449/0x710
[  606.733125][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.733125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.733125][   T72]      ___sys_sendmsg+0xee/0x170
[  606.733125][   T72]      __sys_sendmsg+0xcd/0x170
[  606.733125][   T72]      do_syscall_64+0xc6/0x1e0
[  606.733125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.733125][   T72] 
[  606.735139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  606.735139][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  606.735139][   T72]      ipv6_find_idev+0x102/0x170
[  606.735139][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  606.735139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.735139][   T72]      netlink_rcv_skb+0x130/0x360
[  606.735139][   T72]      netlink_unicast+0x449/0x710
[  606.735139][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.735139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.735139][   T72]      ___sys_sendmsg+0xee/0x170
[  606.735139][   T72]      __sys_sendmsg+0xcd/0x170
[  606.735139][   T72]      do_syscall_64+0xc6/0x1e0
[  606.735139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.735139][   T72] 
[  606.736676][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  606.736676][   T72]      neigh_parms_alloc+0x1e5/0x510
[  606.736676][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  606.736676][   T72]      ipv6_find_idev+0x102/0x170
[  606.736676][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  606.736676][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.736676][   T72]      netlink_rcv_skb+0x130/0x360
[  606.736676][   T72]      netlink_unicast+0x449/0x710
[  606.736676][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.736676][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.736676][   T72]      ___sys_sendmsg+0xee/0x170
[  606.736676][   T72]      __sys_sendmsg+0xcd/0x170
[  606.736676][   T72]      do_syscall_64+0xc6/0x1e0
[  606.736676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.736676][   T72] 
[  606.738386][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  606.738669][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  606.738669][   T72]      netdev_get_by_index+0x5e/0x80
[  606.738669][   T72]      fib6_nh_init+0x3d8/0x15b0
[  606.738669][   T72]      ip6_route_info_create+0xf18/0x17d0
[  606.738669][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  606.738669][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  606.738669][   T72]      addrconf_join_anycast+0x1c0/0x220
[  606.738669][   T72]      dev_forward_change+0x2a6/0x7b0
[  606.738669][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  606.738669][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  606.738669][   T72]      proc_sys_call_handler+0x403/0x5e0
[  606.738669][   T72]      vfs_write+0x9e5/0x10a0
[  606.738669][   T72]      ksys_write+0xf5/0x1e0
[  606.738669][   T72]      do_syscall_64+0xc6/0x1e0
[  606.738669][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.738669][   T72] 
[  606.740515][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  606.740515][   T72]      netdev_get_by_index+0x5e/0x80
[  606.740515][   T72]      fib6_nh_init+0x3d8/0x15b0
[  606.740515][   T72]      ip6_route_info_create+0xf18/0x17d0
[  606.740515][   T72]      addrconf_f6i_alloc+0x244/0x410
[  606.740515][   T72]      ipv6_add_addr+0x411/0x2000
[  606.740515][   T72]      inet6_addr_add+0x30e/0xa40
[  606.740515][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  606.740515][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.740515][   T72]      netlink_rcv_skb+0x130/0x360
[  606.740515][   T72]      netlink_unicast+0x449/0x710
[  606.740515][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.740515][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.740515][   T72]      ___sys_sendmsg+0xee/0x170
[  606.740515][   T72]      __sys_sendmsg+0xcd/0x170
[  606.740515][   T72]      do_syscall_64+0xc6/0x1e0
[  606.740515][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.740515][   T72] 
[  606.742527][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  606.742527][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  606.742527][   T72]      ipv6_find_idev+0x102/0x170
[  606.742527][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  606.742527][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.742527][   T72]      netlink_rcv_skb+0x130/0x360
[  606.742527][   T72]      netlink_unicast+0x449/0x710
[  606.742527][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.742527][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.742527][   T72]      ___sys_sendmsg+0xee/0x170
[  606.742527][   T72]      __sys_sendmsg+0xcd/0x170
[  606.742527][   T72]      do_syscall_64+0xc6/0x1e0
[  606.742527][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.742527][   T72] 
[  606.744064][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  606.744064][   T72]      neigh_parms_alloc+0x1e5/0x510
[  606.744064][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  606.744064][   T72]      ipv6_find_idev+0x102/0x170
[  606.744064][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  606.744064][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  606.744064][   T72]      netlink_rcv_skb+0x130/0x360
[  606.744064][   T72]      netlink_unicast+0x449/0x710
[  606.744064][   T72]      netlink_sendmsg+0x723/0xbe0
[  606.744064][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  606.744064][   T72]      ___sys_sendmsg+0xee/0x170
[  606.744064][   T72]      __sys_sendmsg+0xcd/0x170
[  606.744064][   T72]      do_syscall_64+0xc6/0x1e0
[  606.744064][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.744064][   T72] 
[  606.745743][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  606.745994][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  606.745994][   T72]      dst_init+0x84/0x4a0
[  606.745994][   T72]      dst_alloc+0x97/0x150
[  606.745994][   T72]      ip6_dst_alloc+0x23/0x90
[  606.745994][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  606.745994][   T72]      ip6_pol_route+0x56f/0x840
[  606.745994][   T72]      fib6_rule_lookup+0x227/0x600
[  606.745994][   T72]      ip6_route_output_flags+0x251/0x460
[  606.745994][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  606.745994][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  606.745994][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  606.745994][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  606.745994][   T72]      ip6_datagram_connect+0x2c/0x50
[  606.745994][   T72]      __sys_connect+0x217/0x2a0
[  606.745994][   T72]      __x64_sys_connect+0x72/0xb0
[  606.745994][   T72]      do_syscall_64+0xc6/0x1e0
[  606.745994][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  606.745994][   T72] 
[  615.716648][   T42] INFO: task modprobe:1562 blocked for more than 122 seconds.
[  615.717082][   T42]       Not tainted 6.8.0-virtme #1
[  615.717271][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  615.717522][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[  615.717859][   T42] Call Trace:
[  615.717979][   T42]  <TASK>
[  615.718064][   T42]  __schedule+0x705/0x1ac0
[  615.718234][   T42]  ? __pfx___schedule+0x10/0x10
[  615.718387][   T42]  ? schedule+0x1a5/0x210
[  615.718505][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  615.718679][   T42]  ? mark_lock+0x38/0x3e0
[  615.718797][   T42]  ? do_raw_spin_lock+0x131/0x270
[  615.718957][   T42]  ? schedule+0x1a5/0x210
[  615.719301][   T42]  schedule+0xdf/0x210
[  615.719426][   T42]  schedule_preempt_disabled+0x15/0x30
[  615.719579][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[  615.719754][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[  615.719944][   T42]  ? kasan_save_stack+0x34/0x50
[  615.720095][   T42]  ? kasan_save_stack+0x24/0x50
[  615.720247][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  615.720411][   T42]  ? lock_acquire+0x1c1/0x220
[  615.720563][   T42]  ? register_pernet_subsys+0x1a/0x50
[  615.720732][   T42]  down_write+0x1c9/0x200
[  615.720850][   T42]  ? __pfx_down_write+0x10/0x10
[  615.721003][   T42]  ? __pfx___lock_release+0x10/0x10
[  615.721160][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[  615.721419][   T42]  register_pernet_subsys+0x1a/0x50
[  615.721576][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[  615.721821][   T42]  do_one_initcall+0xc8/0x3f0
[  615.721976][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[  615.722133][   T42]  ? __create_object+0x5e/0xb0
[  615.722289][   T42]  ? kasan_unpoison+0x27/0x60
[  615.722444][   T42]  do_init_module+0x233/0x740
[  615.722619][   T42]  load_module+0x16b5/0x2350
[  615.722787][   T42]  ? __pfx_load_module+0x10/0x10
[  615.722942][   T42]  ? kernel_read_file+0x3d2/0x520
[  615.723104][   T42]  ? kernel_read_file+0x300/0x520
[  615.723260][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[  615.723421][   T42]  ? init_module_from_file+0xd2/0x130
[  615.723577][   T42]  init_module_from_file+0xd2/0x130
[  615.723741][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[  615.723931][   T42]  ? __lock_release+0x103/0x460
[  615.724082][   T42]  ? idempotent_init_module+0x32a/0x620
[  615.724245][   T42]  ? idempotent_init_module+0x32a/0x620
[  615.724401][   T42]  ? do_raw_spin_unlock+0x58/0x220
[  615.724561][   T42]  idempotent_init_module+0x342/0x620
[  615.724729][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[  615.724935][   T42]  __x64_sys_finit_module+0xbe/0x130
[  615.725089][   T42]  do_syscall_64+0xc6/0x1e0
[  615.725243][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  615.725432][   T42] RIP: 0033:0x7ff3fdc10e5d
[  615.725619][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  615.725856][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[  615.726084][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[  615.726308][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[  615.726720][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[  615.726949][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[  615.727195][   T42]  </TASK>
[  615.727315][   T42] 
[  615.727315][   T42] Showing all locks held in the system:
[  615.727533][   T42] 1 lock held by khungtaskd/42:
[  615.727701][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[  615.727978][   T42] 3 locks held by kworker/u16:1/72:
[  615.728128][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  615.728429][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  615.728710][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[  615.728978][   T42] 2 locks held by kworker/u20:3/1240:
[  615.729124][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  615.729425][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  615.729791][   T42] 1 lock held by modprobe/1562:
[  615.729945][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[  615.730250][   T42] 
[  615.730328][   T42] =============================================
[  615.730328][   T42] 
[  616.988723][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  616.989122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  616.989122][   T72]      netdev_get_by_index+0x5e/0x80
[  616.989122][   T72]      fib6_nh_init+0x3d8/0x15b0
[  616.989122][   T72]      ip6_route_info_create+0xf18/0x17d0
[  616.989122][   T72]      addrconf_f6i_alloc+0x244/0x410
[  616.989122][   T72]      ipv6_add_addr+0x411/0x2000
[  616.989122][   T72]      inet6_addr_add+0x30e/0xa40
[  616.989122][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  616.989122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  616.989122][   T72]      netlink_rcv_skb+0x130/0x360
[  616.989122][   T72]      netlink_unicast+0x449/0x710
[  616.989122][   T72]      netlink_sendmsg+0x723/0xbe0
[  616.989122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  616.989122][   T72]      ___sys_sendmsg+0xee/0x170
[  616.989122][   T72]      __sys_sendmsg+0xcd/0x170
[  616.989122][   T72]      do_syscall_64+0xc6/0x1e0
[  616.989122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.989122][   T72] 
[  616.991134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  616.991134][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  616.991134][   T72]      ipv6_find_idev+0x102/0x170
[  616.991134][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  616.991134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  616.991134][   T72]      netlink_rcv_skb+0x130/0x360
[  616.991134][   T72]      netlink_unicast+0x449/0x710
[  616.991134][   T72]      netlink_sendmsg+0x723/0xbe0
[  616.991134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  616.991134][   T72]      ___sys_sendmsg+0xee/0x170
[  616.991134][   T72]      __sys_sendmsg+0xcd/0x170
[  616.991134][   T72]      do_syscall_64+0xc6/0x1e0
[  616.991134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.991134][   T72] 
[  616.992752][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  616.992752][   T72]      neigh_parms_alloc+0x1e5/0x510
[  616.992752][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  616.992752][   T72]      ipv6_find_idev+0x102/0x170
[  616.992752][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  616.992752][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  616.992752][   T72]      netlink_rcv_skb+0x130/0x360
[  616.992752][   T72]      netlink_unicast+0x449/0x710
[  616.992752][   T72]      netlink_sendmsg+0x723/0xbe0
[  616.992752][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  616.992752][   T72]      ___sys_sendmsg+0xee/0x170
[  616.992752][   T72]      __sys_sendmsg+0xcd/0x170
[  616.992752][   T72]      do_syscall_64+0xc6/0x1e0
[  616.992752][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.992752][   T72] 
[  616.994457][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  616.994746][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  616.994746][   T72]      netdev_get_by_index+0x5e/0x80
[  616.994746][   T72]      fib6_nh_init+0x3d8/0x15b0
[  616.994746][   T72]      ip6_route_info_create+0xf18/0x17d0
[  616.994746][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  616.994746][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  616.994746][   T72]      addrconf_join_anycast+0x1c0/0x220
[  616.994746][   T72]      dev_forward_change+0x2a6/0x7b0
[  616.994746][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  616.994746][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  616.994746][   T72]      proc_sys_call_handler+0x403/0x5e0
[  616.994746][   T72]      vfs_write+0x9e5/0x10a0
[  616.994746][   T72]      ksys_write+0xf5/0x1e0
[  616.994746][   T72]      do_syscall_64+0xc6/0x1e0
[  616.994746][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.994746][   T72] 
[  616.996589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  616.996589][   T72]      netdev_get_by_index+0x5e/0x80
[  616.996589][   T72]      fib6_nh_init+0x3d8/0x15b0
[  616.996589][   T72]      ip6_route_info_create+0xf18/0x17d0
[  616.996589][   T72]      addrconf_f6i_alloc+0x244/0x410
[  616.996589][   T72]      ipv6_add_addr+0x411/0x2000
[  616.996589][   T72]      inet6_addr_add+0x30e/0xa40
[  616.996589][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  616.996589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  616.996589][   T72]      netlink_rcv_skb+0x130/0x360
[  616.996589][   T72]      netlink_unicast+0x449/0x710
[  616.996589][   T72]      netlink_sendmsg+0x723/0xbe0
[  616.996589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  616.996589][   T72]      ___sys_sendmsg+0xee/0x170
[  616.996589][   T72]      __sys_sendmsg+0xcd/0x170
[  616.996589][   T72]      do_syscall_64+0xc6/0x1e0
[  616.996589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.996589][   T72] 
[  616.998590][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  616.998590][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  616.998590][   T72]      ipv6_find_idev+0x102/0x170
[  616.998590][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  616.998590][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  616.998590][   T72]      netlink_rcv_skb+0x130/0x360
[  616.998590][   T72]      netlink_unicast+0x449/0x710
[  616.998590][   T72]      netlink_sendmsg+0x723/0xbe0
[  616.998590][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  616.998590][   T72]      ___sys_sendmsg+0xee/0x170
[  616.998590][   T72]      __sys_sendmsg+0xcd/0x170
[  616.998590][   T72]      do_syscall_64+0xc6/0x1e0
[  616.998590][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  616.998590][   T72] 
[  617.000117][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  617.000117][   T72]      neigh_parms_alloc+0x1e5/0x510
[  617.000117][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  617.000117][   T72]      ipv6_find_idev+0x102/0x170
[  617.000117][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  617.000117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  617.000117][   T72]      netlink_rcv_skb+0x130/0x360
[  617.000117][   T72]      netlink_unicast+0x449/0x710
[  617.000117][   T72]      netlink_sendmsg+0x723/0xbe0
[  617.000117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  617.000117][   T72]      ___sys_sendmsg+0xee/0x170
[  617.000117][   T72]      __sys_sendmsg+0xcd/0x170
[  617.000117][   T72]      do_syscall_64+0xc6/0x1e0
[  617.000117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  617.000117][   T72] 
[  617.001799][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  617.002046][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  617.002046][   T72]      dst_init+0x84/0x4a0
[  617.002046][   T72]      dst_alloc+0x97/0x150
[  617.002046][   T72]      ip6_dst_alloc+0x23/0x90
[  617.002046][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  617.002046][   T72]      ip6_pol_route+0x56f/0x840
[  617.002046][   T72]      fib6_rule_lookup+0x227/0x600
[  617.002046][   T72]      ip6_route_output_flags+0x251/0x460
[  617.002046][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  617.002046][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  617.002046][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  617.002046][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  617.002046][   T72]      ip6_datagram_connect+0x2c/0x50
[  617.002046][   T72]      __sys_connect+0x217/0x2a0
[  617.002046][   T72]      __x64_sys_connect+0x72/0xb0
[  617.002046][   T72]      do_syscall_64+0xc6/0x1e0
[  617.002046][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  617.002046][   T72] 
[  627.100750][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  627.101218][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  627.101218][   T72]      netdev_get_by_index+0x5e/0x80
[  627.101218][   T72]      fib6_nh_init+0x3d8/0x15b0
[  627.101218][   T72]      ip6_route_info_create+0xf18/0x17d0
[  627.101218][   T72]      addrconf_f6i_alloc+0x244/0x410
[  627.101218][   T72]      ipv6_add_addr+0x411/0x2000
[  627.101218][   T72]      inet6_addr_add+0x30e/0xa40
[  627.101218][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  627.101218][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.101218][   T72]      netlink_rcv_skb+0x130/0x360
[  627.101218][   T72]      netlink_unicast+0x449/0x710
[  627.101218][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.101218][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.101218][   T72]      ___sys_sendmsg+0xee/0x170
[  627.101218][   T72]      __sys_sendmsg+0xcd/0x170
[  627.101218][   T72]      do_syscall_64+0xc6/0x1e0
[  627.101218][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.101218][   T72] 
[  627.103191][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  627.103191][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  627.103191][   T72]      ipv6_find_idev+0x102/0x170
[  627.103191][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  627.103191][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.103191][   T72]      netlink_rcv_skb+0x130/0x360
[  627.103191][   T72]      netlink_unicast+0x449/0x710
[  627.103191][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.103191][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.103191][   T72]      ___sys_sendmsg+0xee/0x170
[  627.103191][   T72]      __sys_sendmsg+0xcd/0x170
[  627.103191][   T72]      do_syscall_64+0xc6/0x1e0
[  627.103191][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.103191][   T72] 
[  627.104702][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  627.104702][   T72]      neigh_parms_alloc+0x1e5/0x510
[  627.104702][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  627.104702][   T72]      ipv6_find_idev+0x102/0x170
[  627.104702][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  627.104702][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.104702][   T72]      netlink_rcv_skb+0x130/0x360
[  627.104702][   T72]      netlink_unicast+0x449/0x710
[  627.104702][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.104702][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.104702][   T72]      ___sys_sendmsg+0xee/0x170
[  627.104702][   T72]      __sys_sendmsg+0xcd/0x170
[  627.104702][   T72]      do_syscall_64+0xc6/0x1e0
[  627.104702][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.104702][   T72] 
[  627.106380][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  627.106709][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  627.106709][   T72]      netdev_get_by_index+0x5e/0x80
[  627.106709][   T72]      fib6_nh_init+0x3d8/0x15b0
[  627.106709][   T72]      ip6_route_info_create+0xf18/0x17d0
[  627.106709][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  627.106709][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  627.106709][   T72]      addrconf_join_anycast+0x1c0/0x220
[  627.106709][   T72]      dev_forward_change+0x2a6/0x7b0
[  627.106709][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  627.106709][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  627.106709][   T72]      proc_sys_call_handler+0x403/0x5e0
[  627.106709][   T72]      vfs_write+0x9e5/0x10a0
[  627.106709][   T72]      ksys_write+0xf5/0x1e0
[  627.106709][   T72]      do_syscall_64+0xc6/0x1e0
[  627.106709][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.106709][   T72] 
[  627.108535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  627.108535][   T72]      netdev_get_by_index+0x5e/0x80
[  627.108535][   T72]      fib6_nh_init+0x3d8/0x15b0
[  627.108535][   T72]      ip6_route_info_create+0xf18/0x17d0
[  627.108535][   T72]      addrconf_f6i_alloc+0x244/0x410
[  627.108535][   T72]      ipv6_add_addr+0x411/0x2000
[  627.108535][   T72]      inet6_addr_add+0x30e/0xa40
[  627.108535][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  627.108535][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.108535][   T72]      netlink_rcv_skb+0x130/0x360
[  627.108535][   T72]      netlink_unicast+0x449/0x710
[  627.108535][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.108535][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.108535][   T72]      ___sys_sendmsg+0xee/0x170
[  627.108535][   T72]      __sys_sendmsg+0xcd/0x170
[  627.108535][   T72]      do_syscall_64+0xc6/0x1e0
[  627.108535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.108535][   T72] 
[  627.110486][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  627.110486][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  627.110486][   T72]      ipv6_find_idev+0x102/0x170
[  627.110486][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  627.110486][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.110486][   T72]      netlink_rcv_skb+0x130/0x360
[  627.110486][   T72]      netlink_unicast+0x449/0x710
[  627.110486][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.110486][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.110486][   T72]      ___sys_sendmsg+0xee/0x170
[  627.110486][   T72]      __sys_sendmsg+0xcd/0x170
[  627.110486][   T72]      do_syscall_64+0xc6/0x1e0
[  627.110486][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.110486][   T72] 
[  627.111986][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  627.111986][   T72]      neigh_parms_alloc+0x1e5/0x510
[  627.111986][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  627.111986][   T72]      ipv6_find_idev+0x102/0x170
[  627.111986][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  627.111986][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  627.111986][   T72]      netlink_rcv_skb+0x130/0x360
[  627.111986][   T72]      netlink_unicast+0x449/0x710
[  627.111986][   T72]      netlink_sendmsg+0x723/0xbe0
[  627.111986][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  627.111986][   T72]      ___sys_sendmsg+0xee/0x170
[  627.111986][   T72]      __sys_sendmsg+0xcd/0x170
[  627.111986][   T72]      do_syscall_64+0xc6/0x1e0
[  627.111986][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.111986][   T72] 
[  627.113665][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  627.113915][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  627.113915][   T72]      dst_init+0x84/0x4a0
[  627.113915][   T72]      dst_alloc+0x97/0x150
[  627.113915][   T72]      ip6_dst_alloc+0x23/0x90
[  627.113915][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  627.113915][   T72]      ip6_pol_route+0x56f/0x840
[  627.113915][   T72]      fib6_rule_lookup+0x227/0x600
[  627.113915][   T72]      ip6_route_output_flags+0x251/0x460
[  627.113915][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  627.113915][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  627.113915][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  627.113915][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  627.113915][   T72]      ip6_datagram_connect+0x2c/0x50
[  627.113915][   T72]      __sys_connect+0x217/0x2a0
[  627.113915][   T72]      __x64_sys_connect+0x72/0xb0
[  627.113915][   T72]      do_syscall_64+0xc6/0x1e0
[  627.113915][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  627.113915][   T72] 
[  637.180727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  637.181176][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  637.181176][   T72]      netdev_get_by_index+0x5e/0x80
[  637.181176][   T72]      fib6_nh_init+0x3d8/0x15b0
[  637.181176][   T72]      ip6_route_info_create+0xf18/0x17d0
[  637.181176][   T72]      addrconf_f6i_alloc+0x244/0x410
[  637.181176][   T72]      ipv6_add_addr+0x411/0x2000
[  637.181176][   T72]      inet6_addr_add+0x30e/0xa40
[  637.181176][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  637.181176][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.181176][   T72]      netlink_rcv_skb+0x130/0x360
[  637.181176][   T72]      netlink_unicast+0x449/0x710
[  637.181176][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.181176][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.181176][   T72]      ___sys_sendmsg+0xee/0x170
[  637.181176][   T72]      __sys_sendmsg+0xcd/0x170
[  637.181176][   T72]      do_syscall_64+0xc6/0x1e0
[  637.181176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.181176][   T72] 
[  637.183215][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  637.183215][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  637.183215][   T72]      ipv6_find_idev+0x102/0x170
[  637.183215][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  637.183215][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.183215][   T72]      netlink_rcv_skb+0x130/0x360
[  637.183215][   T72]      netlink_unicast+0x449/0x710
[  637.183215][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.183215][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.183215][   T72]      ___sys_sendmsg+0xee/0x170
[  637.183215][   T72]      __sys_sendmsg+0xcd/0x170
[  637.183215][   T72]      do_syscall_64+0xc6/0x1e0
[  637.183215][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.183215][   T72] 
[  637.184769][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  637.184769][   T72]      neigh_parms_alloc+0x1e5/0x510
[  637.184769][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  637.184769][   T72]      ipv6_find_idev+0x102/0x170
[  637.184769][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  637.184769][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.184769][   T72]      netlink_rcv_skb+0x130/0x360
[  637.184769][   T72]      netlink_unicast+0x449/0x710
[  637.184769][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.184769][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.184769][   T72]      ___sys_sendmsg+0xee/0x170
[  637.184769][   T72]      __sys_sendmsg+0xcd/0x170
[  637.184769][   T72]      do_syscall_64+0xc6/0x1e0
[  637.184769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.184769][   T72] 
[  637.186473][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  637.186754][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  637.186754][   T72]      netdev_get_by_index+0x5e/0x80
[  637.186754][   T72]      fib6_nh_init+0x3d8/0x15b0
[  637.186754][   T72]      ip6_route_info_create+0xf18/0x17d0
[  637.186754][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  637.186754][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  637.186754][   T72]      addrconf_join_anycast+0x1c0/0x220
[  637.186754][   T72]      dev_forward_change+0x2a6/0x7b0
[  637.186754][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  637.186754][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  637.186754][   T72]      proc_sys_call_handler+0x403/0x5e0
[  637.186754][   T72]      vfs_write+0x9e5/0x10a0
[  637.186754][   T72]      ksys_write+0xf5/0x1e0
[  637.186754][   T72]      do_syscall_64+0xc6/0x1e0
[  637.186754][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.186754][   T72] 
[  637.188627][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  637.188627][   T72]      netdev_get_by_index+0x5e/0x80
[  637.188627][   T72]      fib6_nh_init+0x3d8/0x15b0
[  637.188627][   T72]      ip6_route_info_create+0xf18/0x17d0
[  637.188627][   T72]      addrconf_f6i_alloc+0x244/0x410
[  637.188627][   T72]      ipv6_add_addr+0x411/0x2000
[  637.188627][   T72]      inet6_addr_add+0x30e/0xa40
[  637.188627][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  637.188627][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.188627][   T72]      netlink_rcv_skb+0x130/0x360
[  637.188627][   T72]      netlink_unicast+0x449/0x710
[  637.188627][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.188627][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.188627][   T72]      ___sys_sendmsg+0xee/0x170
[  637.188627][   T72]      __sys_sendmsg+0xcd/0x170
[  637.188627][   T72]      do_syscall_64+0xc6/0x1e0
[  637.188627][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.188627][   T72] 
[  637.190619][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  637.190619][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  637.190619][   T72]      ipv6_find_idev+0x102/0x170
[  637.190619][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  637.190619][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.190619][   T72]      netlink_rcv_skb+0x130/0x360
[  637.190619][   T72]      netlink_unicast+0x449/0x710
[  637.190619][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.190619][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.190619][   T72]      ___sys_sendmsg+0xee/0x170
[  637.190619][   T72]      __sys_sendmsg+0xcd/0x170
[  637.190619][   T72]      do_syscall_64+0xc6/0x1e0
[  637.190619][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.190619][   T72] 
[  637.192149][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  637.192149][   T72]      neigh_parms_alloc+0x1e5/0x510
[  637.192149][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  637.192149][   T72]      ipv6_find_idev+0x102/0x170
[  637.192149][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  637.192149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  637.192149][   T72]      netlink_rcv_skb+0x130/0x360
[  637.192149][   T72]      netlink_unicast+0x449/0x710
[  637.192149][   T72]      netlink_sendmsg+0x723/0xbe0
[  637.192149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  637.192149][   T72]      ___sys_sendmsg+0xee/0x170
[  637.192149][   T72]      __sys_sendmsg+0xcd/0x170
[  637.192149][   T72]      do_syscall_64+0xc6/0x1e0
[  637.192149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.192149][   T72] 
[  637.193858][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  637.194110][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  637.194110][   T72]      dst_init+0x84/0x4a0
[  637.194110][   T72]      dst_alloc+0x97/0x150
[  637.194110][   T72]      ip6_dst_alloc+0x23/0x90
[  637.194110][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  637.194110][   T72]      ip6_pol_route+0x56f/0x840
[  637.194110][   T72]      fib6_rule_lookup+0x227/0x600
[  637.194110][   T72]      ip6_route_output_flags+0x251/0x460
[  637.194110][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  637.194110][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  637.194110][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  637.194110][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  637.194110][   T72]      ip6_datagram_connect+0x2c/0x50
[  637.194110][   T72]      __sys_connect+0x217/0x2a0
[  637.194110][   T72]      __x64_sys_connect+0x72/0xb0
[  637.194110][   T72]      do_syscall_64+0xc6/0x1e0
[  637.194110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  637.194110][   T72] 
[  647.436719][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  647.437126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  647.437126][   T72]      netdev_get_by_index+0x5e/0x80
[  647.437126][   T72]      fib6_nh_init+0x3d8/0x15b0
[  647.437126][   T72]      ip6_route_info_create+0xf18/0x17d0
[  647.437126][   T72]      addrconf_f6i_alloc+0x244/0x410
[  647.437126][   T72]      ipv6_add_addr+0x411/0x2000
[  647.437126][   T72]      inet6_addr_add+0x30e/0xa40
[  647.437126][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  647.437126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.437126][   T72]      netlink_rcv_skb+0x130/0x360
[  647.437126][   T72]      netlink_unicast+0x449/0x710
[  647.437126][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.437126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.437126][   T72]      ___sys_sendmsg+0xee/0x170
[  647.437126][   T72]      __sys_sendmsg+0xcd/0x170
[  647.437126][   T72]      do_syscall_64+0xc6/0x1e0
[  647.437126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.437126][   T72] 
[  647.439121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  647.439121][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  647.439121][   T72]      ipv6_find_idev+0x102/0x170
[  647.439121][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  647.439121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.439121][   T72]      netlink_rcv_skb+0x130/0x360
[  647.439121][   T72]      netlink_unicast+0x449/0x710
[  647.439121][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.439121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.439121][   T72]      ___sys_sendmsg+0xee/0x170
[  647.439121][   T72]      __sys_sendmsg+0xcd/0x170
[  647.439121][   T72]      do_syscall_64+0xc6/0x1e0
[  647.439121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.439121][   T72] 
[  647.440665][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  647.440665][   T72]      neigh_parms_alloc+0x1e5/0x510
[  647.440665][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  647.440665][   T72]      ipv6_find_idev+0x102/0x170
[  647.440665][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  647.440665][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.440665][   T72]      netlink_rcv_skb+0x130/0x360
[  647.440665][   T72]      netlink_unicast+0x449/0x710
[  647.440665][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.440665][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.440665][   T72]      ___sys_sendmsg+0xee/0x170
[  647.440665][   T72]      __sys_sendmsg+0xcd/0x170
[  647.440665][   T72]      do_syscall_64+0xc6/0x1e0
[  647.440665][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.440665][   T72] 
[  647.442362][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  647.442635][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  647.442635][   T72]      netdev_get_by_index+0x5e/0x80
[  647.442635][   T72]      fib6_nh_init+0x3d8/0x15b0
[  647.442635][   T72]      ip6_route_info_create+0xf18/0x17d0
[  647.442635][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  647.442635][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  647.442635][   T72]      addrconf_join_anycast+0x1c0/0x220
[  647.442635][   T72]      dev_forward_change+0x2a6/0x7b0
[  647.442635][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  647.442635][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  647.442635][   T72]      proc_sys_call_handler+0x403/0x5e0
[  647.442635][   T72]      vfs_write+0x9e5/0x10a0
[  647.442635][   T72]      ksys_write+0xf5/0x1e0
[  647.442635][   T72]      do_syscall_64+0xc6/0x1e0
[  647.442635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.442635][   T72] 
[  647.444468][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  647.444468][   T72]      netdev_get_by_index+0x5e/0x80
[  647.444468][   T72]      fib6_nh_init+0x3d8/0x15b0
[  647.444468][   T72]      ip6_route_info_create+0xf18/0x17d0
[  647.444468][   T72]      addrconf_f6i_alloc+0x244/0x410
[  647.444468][   T72]      ipv6_add_addr+0x411/0x2000
[  647.444468][   T72]      inet6_addr_add+0x30e/0xa40
[  647.444468][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  647.444468][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.444468][   T72]      netlink_rcv_skb+0x130/0x360
[  647.444468][   T72]      netlink_unicast+0x449/0x710
[  647.444468][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.444468][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.444468][   T72]      ___sys_sendmsg+0xee/0x170
[  647.444468][   T72]      __sys_sendmsg+0xcd/0x170
[  647.444468][   T72]      do_syscall_64+0xc6/0x1e0
[  647.444468][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.444468][   T72] 
[  647.446455][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  647.446455][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  647.446455][   T72]      ipv6_find_idev+0x102/0x170
[  647.446455][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  647.446455][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.446455][   T72]      netlink_rcv_skb+0x130/0x360
[  647.446455][   T72]      netlink_unicast+0x449/0x710
[  647.446455][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.446455][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.446455][   T72]      ___sys_sendmsg+0xee/0x170
[  647.446455][   T72]      __sys_sendmsg+0xcd/0x170
[  647.446455][   T72]      do_syscall_64+0xc6/0x1e0
[  647.446455][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.446455][   T72] 
[  647.447984][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  647.447984][   T72]      neigh_parms_alloc+0x1e5/0x510
[  647.447984][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  647.447984][   T72]      ipv6_find_idev+0x102/0x170
[  647.447984][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  647.447984][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  647.447984][   T72]      netlink_rcv_skb+0x130/0x360
[  647.447984][   T72]      netlink_unicast+0x449/0x710
[  647.447984][   T72]      netlink_sendmsg+0x723/0xbe0
[  647.447984][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  647.447984][   T72]      ___sys_sendmsg+0xee/0x170
[  647.447984][   T72]      __sys_sendmsg+0xcd/0x170
[  647.447984][   T72]      do_syscall_64+0xc6/0x1e0
[  647.447984][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.447984][   T72] 
[  647.449666][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  647.449913][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  647.449913][   T72]      dst_init+0x84/0x4a0
[  647.449913][   T72]      dst_alloc+0x97/0x150
[  647.449913][   T72]      ip6_dst_alloc+0x23/0x90
[  647.449913][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  647.449913][   T72]      ip6_pol_route+0x56f/0x840
[  647.449913][   T72]      fib6_rule_lookup+0x227/0x600
[  647.449913][   T72]      ip6_route_output_flags+0x251/0x460
[  647.449913][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  647.449913][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  647.449913][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  647.449913][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  647.449913][   T72]      ip6_datagram_connect+0x2c/0x50
[  647.449913][   T72]      __sys_connect+0x217/0x2a0
[  647.449913][   T72]      __x64_sys_connect+0x72/0xb0
[  647.449913][   T72]      do_syscall_64+0xc6/0x1e0
[  647.449913][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  647.449913][   T72] 
[  657.692719][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  657.693169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  657.693169][   T72]      netdev_get_by_index+0x5e/0x80
[  657.693169][   T72]      fib6_nh_init+0x3d8/0x15b0
[  657.693169][   T72]      ip6_route_info_create+0xf18/0x17d0
[  657.693169][   T72]      addrconf_f6i_alloc+0x244/0x410
[  657.693169][   T72]      ipv6_add_addr+0x411/0x2000
[  657.693169][   T72]      inet6_addr_add+0x30e/0xa40
[  657.693169][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  657.693169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.693169][   T72]      netlink_rcv_skb+0x130/0x360
[  657.693169][   T72]      netlink_unicast+0x449/0x710
[  657.693169][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.693169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.693169][   T72]      ___sys_sendmsg+0xee/0x170
[  657.693169][   T72]      __sys_sendmsg+0xcd/0x170
[  657.693169][   T72]      do_syscall_64+0xc6/0x1e0
[  657.693169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.693169][   T72] 
[  657.695176][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  657.695176][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  657.695176][   T72]      ipv6_find_idev+0x102/0x170
[  657.695176][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  657.695176][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.695176][   T72]      netlink_rcv_skb+0x130/0x360
[  657.695176][   T72]      netlink_unicast+0x449/0x710
[  657.695176][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.695176][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.695176][   T72]      ___sys_sendmsg+0xee/0x170
[  657.695176][   T72]      __sys_sendmsg+0xcd/0x170
[  657.695176][   T72]      do_syscall_64+0xc6/0x1e0
[  657.695176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.695176][   T72] 
[  657.696708][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  657.696708][   T72]      neigh_parms_alloc+0x1e5/0x510
[  657.696708][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  657.696708][   T72]      ipv6_find_idev+0x102/0x170
[  657.696708][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  657.696708][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.696708][   T72]      netlink_rcv_skb+0x130/0x360
[  657.696708][   T72]      netlink_unicast+0x449/0x710
[  657.696708][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.696708][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.696708][   T72]      ___sys_sendmsg+0xee/0x170
[  657.696708][   T72]      __sys_sendmsg+0xcd/0x170
[  657.696708][   T72]      do_syscall_64+0xc6/0x1e0
[  657.696708][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.696708][   T72] 
[  657.698408][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  657.698700][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  657.698700][   T72]      netdev_get_by_index+0x5e/0x80
[  657.698700][   T72]      fib6_nh_init+0x3d8/0x15b0
[  657.698700][   T72]      ip6_route_info_create+0xf18/0x17d0
[  657.698700][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  657.698700][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  657.698700][   T72]      addrconf_join_anycast+0x1c0/0x220
[  657.698700][   T72]      dev_forward_change+0x2a6/0x7b0
[  657.698700][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  657.698700][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  657.698700][   T72]      proc_sys_call_handler+0x403/0x5e0
[  657.698700][   T72]      vfs_write+0x9e5/0x10a0
[  657.698700][   T72]      ksys_write+0xf5/0x1e0
[  657.698700][   T72]      do_syscall_64+0xc6/0x1e0
[  657.698700][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.698700][   T72] 
[  657.700540][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  657.700540][   T72]      netdev_get_by_index+0x5e/0x80
[  657.700540][   T72]      fib6_nh_init+0x3d8/0x15b0
[  657.700540][   T72]      ip6_route_info_create+0xf18/0x17d0
[  657.700540][   T72]      addrconf_f6i_alloc+0x244/0x410
[  657.700540][   T72]      ipv6_add_addr+0x411/0x2000
[  657.700540][   T72]      inet6_addr_add+0x30e/0xa40
[  657.700540][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  657.700540][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.700540][   T72]      netlink_rcv_skb+0x130/0x360
[  657.700540][   T72]      netlink_unicast+0x449/0x710
[  657.700540][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.700540][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.700540][   T72]      ___sys_sendmsg+0xee/0x170
[  657.700540][   T72]      __sys_sendmsg+0xcd/0x170
[  657.700540][   T72]      do_syscall_64+0xc6/0x1e0
[  657.700540][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.700540][   T72] 
[  657.702519][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  657.702519][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  657.702519][   T72]      ipv6_find_idev+0x102/0x170
[  657.702519][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  657.702519][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.702519][   T72]      netlink_rcv_skb+0x130/0x360
[  657.702519][   T72]      netlink_unicast+0x449/0x710
[  657.702519][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.702519][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.702519][   T72]      ___sys_sendmsg+0xee/0x170
[  657.702519][   T72]      __sys_sendmsg+0xcd/0x170
[  657.702519][   T72]      do_syscall_64+0xc6/0x1e0
[  657.702519][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.702519][   T72] 
[  657.704044][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  657.704044][   T72]      neigh_parms_alloc+0x1e5/0x510
[  657.704044][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  657.704044][   T72]      ipv6_find_idev+0x102/0x170
[  657.704044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  657.704044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  657.704044][   T72]      netlink_rcv_skb+0x130/0x360
[  657.704044][   T72]      netlink_unicast+0x449/0x710
[  657.704044][   T72]      netlink_sendmsg+0x723/0xbe0
[  657.704044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  657.704044][   T72]      ___sys_sendmsg+0xee/0x170
[  657.704044][   T72]      __sys_sendmsg+0xcd/0x170
[  657.704044][   T72]      do_syscall_64+0xc6/0x1e0
[  657.704044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.704044][   T72] 
[  657.705722][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  657.705964][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  657.705964][   T72]      dst_init+0x84/0x4a0
[  657.705964][   T72]      dst_alloc+0x97/0x150
[  657.705964][   T72]      ip6_dst_alloc+0x23/0x90
[  657.705964][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  657.705964][   T72]      ip6_pol_route+0x56f/0x840
[  657.705964][   T72]      fib6_rule_lookup+0x227/0x600
[  657.705964][   T72]      ip6_route_output_flags+0x251/0x460
[  657.705964][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  657.705964][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  657.705964][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  657.705964][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  657.705964][   T72]      ip6_datagram_connect+0x2c/0x50
[  657.705964][   T72]      __sys_connect+0x217/0x2a0
[  657.705964][   T72]      __x64_sys_connect+0x72/0xb0
[  657.705964][   T72]      do_syscall_64+0xc6/0x1e0
[  657.705964][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  657.705964][   T72] 
[  667.948711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  667.949160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  667.949160][   T72]      netdev_get_by_index+0x5e/0x80
[  667.949160][   T72]      fib6_nh_init+0x3d8/0x15b0
[  667.949160][   T72]      ip6_route_info_create+0xf18/0x17d0
[  667.949160][   T72]      addrconf_f6i_alloc+0x244/0x410
[  667.949160][   T72]      ipv6_add_addr+0x411/0x2000
[  667.949160][   T72]      inet6_addr_add+0x30e/0xa40
[  667.949160][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  667.949160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.949160][   T72]      netlink_rcv_skb+0x130/0x360
[  667.949160][   T72]      netlink_unicast+0x449/0x710
[  667.949160][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.949160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.949160][   T72]      ___sys_sendmsg+0xee/0x170
[  667.949160][   T72]      __sys_sendmsg+0xcd/0x170
[  667.949160][   T72]      do_syscall_64+0xc6/0x1e0
[  667.949160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.949160][   T72] 
[  667.951144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  667.951144][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  667.951144][   T72]      ipv6_find_idev+0x102/0x170
[  667.951144][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  667.951144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.951144][   T72]      netlink_rcv_skb+0x130/0x360
[  667.951144][   T72]      netlink_unicast+0x449/0x710
[  667.951144][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.951144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.951144][   T72]      ___sys_sendmsg+0xee/0x170
[  667.951144][   T72]      __sys_sendmsg+0xcd/0x170
[  667.951144][   T72]      do_syscall_64+0xc6/0x1e0
[  667.951144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.951144][   T72] 
[  667.952658][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  667.952658][   T72]      neigh_parms_alloc+0x1e5/0x510
[  667.952658][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  667.952658][   T72]      ipv6_find_idev+0x102/0x170
[  667.952658][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  667.952658][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.952658][   T72]      netlink_rcv_skb+0x130/0x360
[  667.952658][   T72]      netlink_unicast+0x449/0x710
[  667.952658][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.952658][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.952658][   T72]      ___sys_sendmsg+0xee/0x170
[  667.952658][   T72]      __sys_sendmsg+0xcd/0x170
[  667.952658][   T72]      do_syscall_64+0xc6/0x1e0
[  667.952658][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.952658][   T72] 
[  667.954318][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  667.954581][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  667.954581][   T72]      netdev_get_by_index+0x5e/0x80
[  667.954581][   T72]      fib6_nh_init+0x3d8/0x15b0
[  667.954581][   T72]      ip6_route_info_create+0xf18/0x17d0
[  667.954581][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  667.954581][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  667.954581][   T72]      addrconf_join_anycast+0x1c0/0x220
[  667.954581][   T72]      dev_forward_change+0x2a6/0x7b0
[  667.954581][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  667.954581][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  667.954581][   T72]      proc_sys_call_handler+0x403/0x5e0
[  667.954581][   T72]      vfs_write+0x9e5/0x10a0
[  667.954581][   T72]      ksys_write+0xf5/0x1e0
[  667.954581][   T72]      do_syscall_64+0xc6/0x1e0
[  667.954581][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.954581][   T72] 
[  667.956402][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  667.956402][   T72]      netdev_get_by_index+0x5e/0x80
[  667.956402][   T72]      fib6_nh_init+0x3d8/0x15b0
[  667.956402][   T72]      ip6_route_info_create+0xf18/0x17d0
[  667.956402][   T72]      addrconf_f6i_alloc+0x244/0x410
[  667.956402][   T72]      ipv6_add_addr+0x411/0x2000
[  667.956402][   T72]      inet6_addr_add+0x30e/0xa40
[  667.956402][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  667.956402][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.956402][   T72]      netlink_rcv_skb+0x130/0x360
[  667.956402][   T72]      netlink_unicast+0x449/0x710
[  667.956402][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.956402][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.956402][   T72]      ___sys_sendmsg+0xee/0x170
[  667.956402][   T72]      __sys_sendmsg+0xcd/0x170
[  667.956402][   T72]      do_syscall_64+0xc6/0x1e0
[  667.956402][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.956402][   T72] 
[  667.958371][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  667.958371][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  667.958371][   T72]      ipv6_find_idev+0x102/0x170
[  667.958371][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  667.958371][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.958371][   T72]      netlink_rcv_skb+0x130/0x360
[  667.958371][   T72]      netlink_unicast+0x449/0x710
[  667.958371][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.958371][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.958371][   T72]      ___sys_sendmsg+0xee/0x170
[  667.958371][   T72]      __sys_sendmsg+0xcd/0x170
[  667.958371][   T72]      do_syscall_64+0xc6/0x1e0
[  667.958371][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.958371][   T72] 
[  667.959877][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  667.959877][   T72]      neigh_parms_alloc+0x1e5/0x510
[  667.959877][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  667.959877][   T72]      ipv6_find_idev+0x102/0x170
[  667.959877][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  667.959877][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  667.959877][   T72]      netlink_rcv_skb+0x130/0x360
[  667.959877][   T72]      netlink_unicast+0x449/0x710
[  667.959877][   T72]      netlink_sendmsg+0x723/0xbe0
[  667.959877][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  667.959877][   T72]      ___sys_sendmsg+0xee/0x170
[  667.959877][   T72]      __sys_sendmsg+0xcd/0x170
[  667.959877][   T72]      do_syscall_64+0xc6/0x1e0
[  667.959877][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.959877][   T72] 
[  667.961532][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  667.961811][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  667.961811][   T72]      dst_init+0x84/0x4a0
[  667.961811][   T72]      dst_alloc+0x97/0x150
[  667.961811][   T72]      ip6_dst_alloc+0x23/0x90
[  667.961811][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  667.961811][   T72]      ip6_pol_route+0x56f/0x840
[  667.961811][   T72]      fib6_rule_lookup+0x227/0x600
[  667.961811][   T72]      ip6_route_output_flags+0x251/0x460
[  667.961811][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  667.961811][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  667.961811][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  667.961811][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  667.961811][   T72]      ip6_datagram_connect+0x2c/0x50
[  667.961811][   T72]      __sys_connect+0x217/0x2a0
[  667.961811][   T72]      __x64_sys_connect+0x72/0xb0
[  667.961811][   T72]      do_syscall_64+0xc6/0x1e0
[  667.961811][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  667.961811][   T72] 
[  678.204695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  678.205139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  678.205139][   T72]      netdev_get_by_index+0x5e/0x80
[  678.205139][   T72]      fib6_nh_init+0x3d8/0x15b0
[  678.205139][   T72]      ip6_route_info_create+0xf18/0x17d0
[  678.205139][   T72]      addrconf_f6i_alloc+0x244/0x410
[  678.205139][   T72]      ipv6_add_addr+0x411/0x2000
[  678.205139][   T72]      inet6_addr_add+0x30e/0xa40
[  678.205139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  678.205139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.205139][   T72]      netlink_rcv_skb+0x130/0x360
[  678.205139][   T72]      netlink_unicast+0x449/0x710
[  678.205139][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.205139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.205139][   T72]      ___sys_sendmsg+0xee/0x170
[  678.205139][   T72]      __sys_sendmsg+0xcd/0x170
[  678.205139][   T72]      do_syscall_64+0xc6/0x1e0
[  678.205139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.205139][   T72] 
[  678.207127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  678.207127][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  678.207127][   T72]      ipv6_find_idev+0x102/0x170
[  678.207127][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  678.207127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.207127][   T72]      netlink_rcv_skb+0x130/0x360
[  678.207127][   T72]      netlink_unicast+0x449/0x710
[  678.207127][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.207127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.207127][   T72]      ___sys_sendmsg+0xee/0x170
[  678.207127][   T72]      __sys_sendmsg+0xcd/0x170
[  678.207127][   T72]      do_syscall_64+0xc6/0x1e0
[  678.207127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.207127][   T72] 
[  678.208638][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  678.208638][   T72]      neigh_parms_alloc+0x1e5/0x510
[  678.208638][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  678.208638][   T72]      ipv6_find_idev+0x102/0x170
[  678.208638][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  678.208638][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.208638][   T72]      netlink_rcv_skb+0x130/0x360
[  678.208638][   T72]      netlink_unicast+0x449/0x710
[  678.208638][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.208638][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.208638][   T72]      ___sys_sendmsg+0xee/0x170
[  678.208638][   T72]      __sys_sendmsg+0xcd/0x170
[  678.208638][   T72]      do_syscall_64+0xc6/0x1e0
[  678.208638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.208638][   T72] 
[  678.210313][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  678.210638][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  678.210638][   T72]      netdev_get_by_index+0x5e/0x80
[  678.210638][   T72]      fib6_nh_init+0x3d8/0x15b0
[  678.210638][   T72]      ip6_route_info_create+0xf18/0x17d0
[  678.210638][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  678.210638][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  678.210638][   T72]      addrconf_join_anycast+0x1c0/0x220
[  678.210638][   T72]      dev_forward_change+0x2a6/0x7b0
[  678.210638][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  678.210638][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  678.210638][   T72]      proc_sys_call_handler+0x403/0x5e0
[  678.210638][   T72]      vfs_write+0x9e5/0x10a0
[  678.210638][   T72]      ksys_write+0xf5/0x1e0
[  678.210638][   T72]      do_syscall_64+0xc6/0x1e0
[  678.210638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.210638][   T72] 
[  678.212458][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  678.212458][   T72]      netdev_get_by_index+0x5e/0x80
[  678.212458][   T72]      fib6_nh_init+0x3d8/0x15b0
[  678.212458][   T72]      ip6_route_info_create+0xf18/0x17d0
[  678.212458][   T72]      addrconf_f6i_alloc+0x244/0x410
[  678.212458][   T72]      ipv6_add_addr+0x411/0x2000
[  678.212458][   T72]      inet6_addr_add+0x30e/0xa40
[  678.212458][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  678.212458][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.212458][   T72]      netlink_rcv_skb+0x130/0x360
[  678.212458][   T72]      netlink_unicast+0x449/0x710
[  678.212458][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.212458][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.212458][   T72]      ___sys_sendmsg+0xee/0x170
[  678.212458][   T72]      __sys_sendmsg+0xcd/0x170
[  678.212458][   T72]      do_syscall_64+0xc6/0x1e0
[  678.212458][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.212458][   T72] 
[  678.214425][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  678.214425][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  678.214425][   T72]      ipv6_find_idev+0x102/0x170
[  678.214425][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  678.214425][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.214425][   T72]      netlink_rcv_skb+0x130/0x360
[  678.214425][   T72]      netlink_unicast+0x449/0x710
[  678.214425][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.214425][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.214425][   T72]      ___sys_sendmsg+0xee/0x170
[  678.214425][   T72]      __sys_sendmsg+0xcd/0x170
[  678.214425][   T72]      do_syscall_64+0xc6/0x1e0
[  678.214425][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.214425][   T72] 
[  678.215941][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  678.215941][   T72]      neigh_parms_alloc+0x1e5/0x510
[  678.215941][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  678.215941][   T72]      ipv6_find_idev+0x102/0x170
[  678.215941][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  678.215941][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  678.215941][   T72]      netlink_rcv_skb+0x130/0x360
[  678.215941][   T72]      netlink_unicast+0x449/0x710
[  678.215941][   T72]      netlink_sendmsg+0x723/0xbe0
[  678.215941][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  678.215941][   T72]      ___sys_sendmsg+0xee/0x170
[  678.215941][   T72]      __sys_sendmsg+0xcd/0x170
[  678.215941][   T72]      do_syscall_64+0xc6/0x1e0
[  678.215941][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.215941][   T72] 
[  678.217617][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  678.217852][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  678.217852][   T72]      dst_init+0x84/0x4a0
[  678.217852][   T72]      dst_alloc+0x97/0x150
[  678.217852][   T72]      ip6_dst_alloc+0x23/0x90
[  678.217852][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  678.217852][   T72]      ip6_pol_route+0x56f/0x840
[  678.217852][   T72]      fib6_rule_lookup+0x227/0x600
[  678.217852][   T72]      ip6_route_output_flags+0x251/0x460
[  678.217852][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  678.217852][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  678.217852][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  678.217852][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  678.217852][   T72]      ip6_datagram_connect+0x2c/0x50
[  678.217852][   T72]      __sys_connect+0x217/0x2a0
[  678.217852][   T72]      __x64_sys_connect+0x72/0xb0
[  678.217852][   T72]      do_syscall_64+0xc6/0x1e0
[  678.217852][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  678.217852][   T72] 
[  688.300697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  688.301151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  688.301151][   T72]      netdev_get_by_index+0x5e/0x80
[  688.301151][   T72]      fib6_nh_init+0x3d8/0x15b0
[  688.301151][   T72]      ip6_route_info_create+0xf18/0x17d0
[  688.301151][   T72]      addrconf_f6i_alloc+0x244/0x410
[  688.301151][   T72]      ipv6_add_addr+0x411/0x2000
[  688.301151][   T72]      inet6_addr_add+0x30e/0xa40
[  688.301151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  688.301151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.301151][   T72]      netlink_rcv_skb+0x130/0x360
[  688.301151][   T72]      netlink_unicast+0x449/0x710
[  688.301151][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.301151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.301151][   T72]      ___sys_sendmsg+0xee/0x170
[  688.301151][   T72]      __sys_sendmsg+0xcd/0x170
[  688.301151][   T72]      do_syscall_64+0xc6/0x1e0
[  688.301151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.301151][   T72] 
[  688.303138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  688.303138][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  688.303138][   T72]      ipv6_find_idev+0x102/0x170
[  688.303138][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  688.303138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.303138][   T72]      netlink_rcv_skb+0x130/0x360
[  688.303138][   T72]      netlink_unicast+0x449/0x710
[  688.303138][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.303138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.303138][   T72]      ___sys_sendmsg+0xee/0x170
[  688.303138][   T72]      __sys_sendmsg+0xcd/0x170
[  688.303138][   T72]      do_syscall_64+0xc6/0x1e0
[  688.303138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.303138][   T72] 
[  688.304687][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  688.304687][   T72]      neigh_parms_alloc+0x1e5/0x510
[  688.304687][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  688.304687][   T72]      ipv6_find_idev+0x102/0x170
[  688.304687][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  688.304687][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.304687][   T72]      netlink_rcv_skb+0x130/0x360
[  688.304687][   T72]      netlink_unicast+0x449/0x710
[  688.304687][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.304687][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.304687][   T72]      ___sys_sendmsg+0xee/0x170
[  688.304687][   T72]      __sys_sendmsg+0xcd/0x170
[  688.304687][   T72]      do_syscall_64+0xc6/0x1e0
[  688.304687][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.304687][   T72] 
[  688.306413][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  688.306694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  688.306694][   T72]      netdev_get_by_index+0x5e/0x80
[  688.306694][   T72]      fib6_nh_init+0x3d8/0x15b0
[  688.306694][   T72]      ip6_route_info_create+0xf18/0x17d0
[  688.306694][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  688.306694][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  688.306694][   T72]      addrconf_join_anycast+0x1c0/0x220
[  688.306694][   T72]      dev_forward_change+0x2a6/0x7b0
[  688.306694][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  688.306694][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  688.306694][   T72]      proc_sys_call_handler+0x403/0x5e0
[  688.306694][   T72]      vfs_write+0x9e5/0x10a0
[  688.306694][   T72]      ksys_write+0xf5/0x1e0
[  688.306694][   T72]      do_syscall_64+0xc6/0x1e0
[  688.306694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.306694][   T72] 
[  688.308543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  688.308543][   T72]      netdev_get_by_index+0x5e/0x80
[  688.308543][   T72]      fib6_nh_init+0x3d8/0x15b0
[  688.308543][   T72]      ip6_route_info_create+0xf18/0x17d0
[  688.308543][   T72]      addrconf_f6i_alloc+0x244/0x410
[  688.308543][   T72]      ipv6_add_addr+0x411/0x2000
[  688.308543][   T72]      inet6_addr_add+0x30e/0xa40
[  688.308543][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  688.308543][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.308543][   T72]      netlink_rcv_skb+0x130/0x360
[  688.308543][   T72]      netlink_unicast+0x449/0x710
[  688.308543][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.308543][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.308543][   T72]      ___sys_sendmsg+0xee/0x170
[  688.308543][   T72]      __sys_sendmsg+0xcd/0x170
[  688.308543][   T72]      do_syscall_64+0xc6/0x1e0
[  688.308543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.308543][   T72] 
[  688.310498][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  688.310498][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  688.310498][   T72]      ipv6_find_idev+0x102/0x170
[  688.310498][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  688.310498][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.310498][   T72]      netlink_rcv_skb+0x130/0x360
[  688.310498][   T72]      netlink_unicast+0x449/0x710
[  688.310498][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.310498][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.310498][   T72]      ___sys_sendmsg+0xee/0x170
[  688.310498][   T72]      __sys_sendmsg+0xcd/0x170
[  688.310498][   T72]      do_syscall_64+0xc6/0x1e0
[  688.310498][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.310498][   T72] 
[  688.312009][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  688.312009][   T72]      neigh_parms_alloc+0x1e5/0x510
[  688.312009][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  688.312009][   T72]      ipv6_find_idev+0x102/0x170
[  688.312009][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  688.312009][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  688.312009][   T72]      netlink_rcv_skb+0x130/0x360
[  688.312009][   T72]      netlink_unicast+0x449/0x710
[  688.312009][   T72]      netlink_sendmsg+0x723/0xbe0
[  688.312009][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  688.312009][   T72]      ___sys_sendmsg+0xee/0x170
[  688.312009][   T72]      __sys_sendmsg+0xcd/0x170
[  688.312009][   T72]      do_syscall_64+0xc6/0x1e0
[  688.312009][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.312009][   T72] 
[  688.313665][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  688.314144][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  688.314144][   T72]      dst_init+0x84/0x4a0
[  688.314144][   T72]      dst_alloc+0x97/0x150
[  688.314144][   T72]      ip6_dst_alloc+0x23/0x90
[  688.314144][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  688.314144][   T72]      ip6_pol_route+0x56f/0x840
[  688.314144][   T72]      fib6_rule_lookup+0x227/0x600
[  688.314144][   T72]      ip6_route_output_flags+0x251/0x460
[  688.314144][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  688.314144][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  688.314144][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  688.314144][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  688.314144][   T72]      ip6_datagram_connect+0x2c/0x50
[  688.314144][   T72]      __sys_connect+0x217/0x2a0
[  688.314144][   T72]      __x64_sys_connect+0x72/0xb0
[  688.314144][   T72]      do_syscall_64+0xc6/0x1e0
[  688.314144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  688.314144][   T72] 
[  698.556727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  698.557149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  698.557149][   T72]      netdev_get_by_index+0x5e/0x80
[  698.557149][   T72]      fib6_nh_init+0x3d8/0x15b0
[  698.557149][   T72]      ip6_route_info_create+0xf18/0x17d0
[  698.557149][   T72]      addrconf_f6i_alloc+0x244/0x410
[  698.557149][   T72]      ipv6_add_addr+0x411/0x2000
[  698.557149][   T72]      inet6_addr_add+0x30e/0xa40
[  698.557149][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  698.557149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.557149][   T72]      netlink_rcv_skb+0x130/0x360
[  698.557149][   T72]      netlink_unicast+0x449/0x710
[  698.557149][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.557149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.557149][   T72]      ___sys_sendmsg+0xee/0x170
[  698.557149][   T72]      __sys_sendmsg+0xcd/0x170
[  698.557149][   T72]      do_syscall_64+0xc6/0x1e0
[  698.557149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.557149][   T72] 
[  698.559201][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  698.559201][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  698.559201][   T72]      ipv6_find_idev+0x102/0x170
[  698.559201][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  698.559201][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.559201][   T72]      netlink_rcv_skb+0x130/0x360
[  698.559201][   T72]      netlink_unicast+0x449/0x710
[  698.559201][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.559201][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.559201][   T72]      ___sys_sendmsg+0xee/0x170
[  698.559201][   T72]      __sys_sendmsg+0xcd/0x170
[  698.559201][   T72]      do_syscall_64+0xc6/0x1e0
[  698.559201][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.559201][   T72] 
[  698.560708][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  698.560708][   T72]      neigh_parms_alloc+0x1e5/0x510
[  698.560708][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  698.560708][   T72]      ipv6_find_idev+0x102/0x170
[  698.560708][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  698.560708][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.560708][   T72]      netlink_rcv_skb+0x130/0x360
[  698.560708][   T72]      netlink_unicast+0x449/0x710
[  698.560708][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.560708][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.560708][   T72]      ___sys_sendmsg+0xee/0x170
[  698.560708][   T72]      __sys_sendmsg+0xcd/0x170
[  698.560708][   T72]      do_syscall_64+0xc6/0x1e0
[  698.560708][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.560708][   T72] 
[  698.562353][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  698.562627][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  698.562627][   T72]      netdev_get_by_index+0x5e/0x80
[  698.562627][   T72]      fib6_nh_init+0x3d8/0x15b0
[  698.562627][   T72]      ip6_route_info_create+0xf18/0x17d0
[  698.562627][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  698.562627][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  698.562627][   T72]      addrconf_join_anycast+0x1c0/0x220
[  698.562627][   T72]      dev_forward_change+0x2a6/0x7b0
[  698.562627][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  698.562627][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  698.562627][   T72]      proc_sys_call_handler+0x403/0x5e0
[  698.562627][   T72]      vfs_write+0x9e5/0x10a0
[  698.562627][   T72]      ksys_write+0xf5/0x1e0
[  698.562627][   T72]      do_syscall_64+0xc6/0x1e0
[  698.562627][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.562627][   T72] 
[  698.564455][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  698.564455][   T72]      netdev_get_by_index+0x5e/0x80
[  698.564455][   T72]      fib6_nh_init+0x3d8/0x15b0
[  698.564455][   T72]      ip6_route_info_create+0xf18/0x17d0
[  698.564455][   T72]      addrconf_f6i_alloc+0x244/0x410
[  698.564455][   T72]      ipv6_add_addr+0x411/0x2000
[  698.564455][   T72]      inet6_addr_add+0x30e/0xa40
[  698.564455][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  698.564455][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.564455][   T72]      netlink_rcv_skb+0x130/0x360
[  698.564455][   T72]      netlink_unicast+0x449/0x710
[  698.564455][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.564455][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.564455][   T72]      ___sys_sendmsg+0xee/0x170
[  698.564455][   T72]      __sys_sendmsg+0xcd/0x170
[  698.564455][   T72]      do_syscall_64+0xc6/0x1e0
[  698.564455][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.564455][   T72] 
[  698.566412][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  698.566412][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  698.566412][   T72]      ipv6_find_idev+0x102/0x170
[  698.566412][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  698.566412][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.566412][   T72]      netlink_rcv_skb+0x130/0x360
[  698.566412][   T72]      netlink_unicast+0x449/0x710
[  698.566412][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.566412][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.566412][   T72]      ___sys_sendmsg+0xee/0x170
[  698.566412][   T72]      __sys_sendmsg+0xcd/0x170
[  698.566412][   T72]      do_syscall_64+0xc6/0x1e0
[  698.566412][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.566412][   T72] 
[  698.567928][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  698.567928][   T72]      neigh_parms_alloc+0x1e5/0x510
[  698.567928][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  698.567928][   T72]      ipv6_find_idev+0x102/0x170
[  698.567928][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  698.567928][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  698.567928][   T72]      netlink_rcv_skb+0x130/0x360
[  698.567928][   T72]      netlink_unicast+0x449/0x710
[  698.567928][   T72]      netlink_sendmsg+0x723/0xbe0
[  698.567928][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  698.567928][   T72]      ___sys_sendmsg+0xee/0x170
[  698.567928][   T72]      __sys_sendmsg+0xcd/0x170
[  698.567928][   T72]      do_syscall_64+0xc6/0x1e0
[  698.567928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.567928][   T72] 
[  698.569578][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  698.569824][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  698.569824][   T72]      dst_init+0x84/0x4a0
[  698.569824][   T72]      dst_alloc+0x97/0x150
[  698.569824][   T72]      ip6_dst_alloc+0x23/0x90
[  698.569824][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  698.569824][   T72]      ip6_pol_route+0x56f/0x840
[  698.569824][   T72]      fib6_rule_lookup+0x227/0x600
[  698.569824][   T72]      ip6_route_output_flags+0x251/0x460
[  698.569824][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  698.569824][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  698.569824][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  698.569824][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  698.569824][   T72]      ip6_datagram_connect+0x2c/0x50
[  698.569824][   T72]      __sys_connect+0x217/0x2a0
[  698.569824][   T72]      __x64_sys_connect+0x72/0xb0
[  698.569824][   T72]      do_syscall_64+0xc6/0x1e0
[  698.569824][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  698.569824][   T72] 
[  708.812717][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  708.813098][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  708.813098][   T72]      netdev_get_by_index+0x5e/0x80
[  708.813098][   T72]      fib6_nh_init+0x3d8/0x15b0
[  708.813098][   T72]      ip6_route_info_create+0xf18/0x17d0
[  708.813098][   T72]      addrconf_f6i_alloc+0x244/0x410
[  708.813098][   T72]      ipv6_add_addr+0x411/0x2000
[  708.813098][   T72]      inet6_addr_add+0x30e/0xa40
[  708.813098][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  708.813098][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.813098][   T72]      netlink_rcv_skb+0x130/0x360
[  708.813098][   T72]      netlink_unicast+0x449/0x710
[  708.813098][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.813098][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.813098][   T72]      ___sys_sendmsg+0xee/0x170
[  708.813098][   T72]      __sys_sendmsg+0xcd/0x170
[  708.813098][   T72]      do_syscall_64+0xc6/0x1e0
[  708.813098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.813098][   T72] 
[  708.815101][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  708.815101][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  708.815101][   T72]      ipv6_find_idev+0x102/0x170
[  708.815101][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  708.815101][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.815101][   T72]      netlink_rcv_skb+0x130/0x360
[  708.815101][   T72]      netlink_unicast+0x449/0x710
[  708.815101][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.815101][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.815101][   T72]      ___sys_sendmsg+0xee/0x170
[  708.815101][   T72]      __sys_sendmsg+0xcd/0x170
[  708.815101][   T72]      do_syscall_64+0xc6/0x1e0
[  708.815101][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.815101][   T72] 
[  708.816613][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  708.816613][   T72]      neigh_parms_alloc+0x1e5/0x510
[  708.816613][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  708.816613][   T72]      ipv6_find_idev+0x102/0x170
[  708.816613][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  708.816613][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.816613][   T72]      netlink_rcv_skb+0x130/0x360
[  708.816613][   T72]      netlink_unicast+0x449/0x710
[  708.816613][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.816613][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.816613][   T72]      ___sys_sendmsg+0xee/0x170
[  708.816613][   T72]      __sys_sendmsg+0xcd/0x170
[  708.816613][   T72]      do_syscall_64+0xc6/0x1e0
[  708.816613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.816613][   T72] 
[  708.818290][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  708.818575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  708.818575][   T72]      netdev_get_by_index+0x5e/0x80
[  708.818575][   T72]      fib6_nh_init+0x3d8/0x15b0
[  708.818575][   T72]      ip6_route_info_create+0xf18/0x17d0
[  708.818575][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  708.818575][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  708.818575][   T72]      addrconf_join_anycast+0x1c0/0x220
[  708.818575][   T72]      dev_forward_change+0x2a6/0x7b0
[  708.818575][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  708.818575][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  708.818575][   T72]      proc_sys_call_handler+0x403/0x5e0
[  708.818575][   T72]      vfs_write+0x9e5/0x10a0
[  708.818575][   T72]      ksys_write+0xf5/0x1e0
[  708.818575][   T72]      do_syscall_64+0xc6/0x1e0
[  708.818575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.818575][   T72] 
[  708.820393][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  708.820393][   T72]      netdev_get_by_index+0x5e/0x80
[  708.820393][   T72]      fib6_nh_init+0x3d8/0x15b0
[  708.820393][   T72]      ip6_route_info_create+0xf18/0x17d0
[  708.820393][   T72]      addrconf_f6i_alloc+0x244/0x410
[  708.820393][   T72]      ipv6_add_addr+0x411/0x2000
[  708.820393][   T72]      inet6_addr_add+0x30e/0xa40
[  708.820393][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  708.820393][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.820393][   T72]      netlink_rcv_skb+0x130/0x360
[  708.820393][   T72]      netlink_unicast+0x449/0x710
[  708.820393][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.820393][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.820393][   T72]      ___sys_sendmsg+0xee/0x170
[  708.820393][   T72]      __sys_sendmsg+0xcd/0x170
[  708.820393][   T72]      do_syscall_64+0xc6/0x1e0
[  708.820393][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.820393][   T72] 
[  708.822350][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  708.822350][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  708.822350][   T72]      ipv6_find_idev+0x102/0x170
[  708.822350][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  708.822350][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.822350][   T72]      netlink_rcv_skb+0x130/0x360
[  708.822350][   T72]      netlink_unicast+0x449/0x710
[  708.822350][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.822350][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.822350][   T72]      ___sys_sendmsg+0xee/0x170
[  708.822350][   T72]      __sys_sendmsg+0xcd/0x170
[  708.822350][   T72]      do_syscall_64+0xc6/0x1e0
[  708.822350][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.822350][   T72] 
[  708.823861][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  708.823861][   T72]      neigh_parms_alloc+0x1e5/0x510
[  708.823861][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  708.823861][   T72]      ipv6_find_idev+0x102/0x170
[  708.823861][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  708.823861][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  708.823861][   T72]      netlink_rcv_skb+0x130/0x360
[  708.823861][   T72]      netlink_unicast+0x449/0x710
[  708.823861][   T72]      netlink_sendmsg+0x723/0xbe0
[  708.823861][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  708.823861][   T72]      ___sys_sendmsg+0xee/0x170
[  708.823861][   T72]      __sys_sendmsg+0xcd/0x170
[  708.823861][   T72]      do_syscall_64+0xc6/0x1e0
[  708.823861][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.823861][   T72] 
[  708.825516][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  708.825777][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  708.825777][   T72]      dst_init+0x84/0x4a0
[  708.825777][   T72]      dst_alloc+0x97/0x150
[  708.825777][   T72]      ip6_dst_alloc+0x23/0x90
[  708.825777][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  708.825777][   T72]      ip6_pol_route+0x56f/0x840
[  708.825777][   T72]      fib6_rule_lookup+0x227/0x600
[  708.825777][   T72]      ip6_route_output_flags+0x251/0x460
[  708.825777][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  708.825777][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  708.825777][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  708.825777][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  708.825777][   T72]      ip6_datagram_connect+0x2c/0x50
[  708.825777][   T72]      __sys_connect+0x217/0x2a0
[  708.825777][   T72]      __x64_sys_connect+0x72/0xb0
[  708.825777][   T72]      do_syscall_64+0xc6/0x1e0
[  708.825777][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  708.825777][   T72] 
[  719.068720][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  719.069177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  719.069177][   T72]      netdev_get_by_index+0x5e/0x80
[  719.069177][   T72]      fib6_nh_init+0x3d8/0x15b0
[  719.069177][   T72]      ip6_route_info_create+0xf18/0x17d0
[  719.069177][   T72]      addrconf_f6i_alloc+0x244/0x410
[  719.069177][   T72]      ipv6_add_addr+0x411/0x2000
[  719.069177][   T72]      inet6_addr_add+0x30e/0xa40
[  719.069177][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  719.069177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.069177][   T72]      netlink_rcv_skb+0x130/0x360
[  719.069177][   T72]      netlink_unicast+0x449/0x710
[  719.069177][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.069177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.069177][   T72]      ___sys_sendmsg+0xee/0x170
[  719.069177][   T72]      __sys_sendmsg+0xcd/0x170
[  719.069177][   T72]      do_syscall_64+0xc6/0x1e0
[  719.069177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.069177][   T72] 
[  719.071171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  719.071171][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  719.071171][   T72]      ipv6_find_idev+0x102/0x170
[  719.071171][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  719.071171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.071171][   T72]      netlink_rcv_skb+0x130/0x360
[  719.071171][   T72]      netlink_unicast+0x449/0x710
[  719.071171][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.071171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.071171][   T72]      ___sys_sendmsg+0xee/0x170
[  719.071171][   T72]      __sys_sendmsg+0xcd/0x170
[  719.071171][   T72]      do_syscall_64+0xc6/0x1e0
[  719.071171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.071171][   T72] 
[  719.072700][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  719.072700][   T72]      neigh_parms_alloc+0x1e5/0x510
[  719.072700][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  719.072700][   T72]      ipv6_find_idev+0x102/0x170
[  719.072700][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  719.072700][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.072700][   T72]      netlink_rcv_skb+0x130/0x360
[  719.072700][   T72]      netlink_unicast+0x449/0x710
[  719.072700][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.072700][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.072700][   T72]      ___sys_sendmsg+0xee/0x170
[  719.072700][   T72]      __sys_sendmsg+0xcd/0x170
[  719.072700][   T72]      do_syscall_64+0xc6/0x1e0
[  719.072700][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.072700][   T72] 
[  719.074406][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  719.074697][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  719.074697][   T72]      netdev_get_by_index+0x5e/0x80
[  719.074697][   T72]      fib6_nh_init+0x3d8/0x15b0
[  719.074697][   T72]      ip6_route_info_create+0xf18/0x17d0
[  719.074697][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  719.074697][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  719.074697][   T72]      addrconf_join_anycast+0x1c0/0x220
[  719.074697][   T72]      dev_forward_change+0x2a6/0x7b0
[  719.074697][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  719.074697][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  719.074697][   T72]      proc_sys_call_handler+0x403/0x5e0
[  719.074697][   T72]      vfs_write+0x9e5/0x10a0
[  719.074697][   T72]      ksys_write+0xf5/0x1e0
[  719.074697][   T72]      do_syscall_64+0xc6/0x1e0
[  719.074697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.074697][   T72] 
[  719.076541][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  719.076541][   T72]      netdev_get_by_index+0x5e/0x80
[  719.076541][   T72]      fib6_nh_init+0x3d8/0x15b0
[  719.076541][   T72]      ip6_route_info_create+0xf18/0x17d0
[  719.076541][   T72]      addrconf_f6i_alloc+0x244/0x410
[  719.076541][   T72]      ipv6_add_addr+0x411/0x2000
[  719.076541][   T72]      inet6_addr_add+0x30e/0xa40
[  719.076541][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  719.076541][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.076541][   T72]      netlink_rcv_skb+0x130/0x360
[  719.076541][   T72]      netlink_unicast+0x449/0x710
[  719.076541][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.076541][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.076541][   T72]      ___sys_sendmsg+0xee/0x170
[  719.076541][   T72]      __sys_sendmsg+0xcd/0x170
[  719.076541][   T72]      do_syscall_64+0xc6/0x1e0
[  719.076541][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.076541][   T72] 
[  719.078525][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  719.078525][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  719.078525][   T72]      ipv6_find_idev+0x102/0x170
[  719.078525][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  719.078525][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.078525][   T72]      netlink_rcv_skb+0x130/0x360
[  719.078525][   T72]      netlink_unicast+0x449/0x710
[  719.078525][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.078525][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.078525][   T72]      ___sys_sendmsg+0xee/0x170
[  719.078525][   T72]      __sys_sendmsg+0xcd/0x170
[  719.078525][   T72]      do_syscall_64+0xc6/0x1e0
[  719.078525][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.078525][   T72] 
[  719.080057][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  719.080057][   T72]      neigh_parms_alloc+0x1e5/0x510
[  719.080057][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  719.080057][   T72]      ipv6_find_idev+0x102/0x170
[  719.080057][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  719.080057][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  719.080057][   T72]      netlink_rcv_skb+0x130/0x360
[  719.080057][   T72]      netlink_unicast+0x449/0x710
[  719.080057][   T72]      netlink_sendmsg+0x723/0xbe0
[  719.080057][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  719.080057][   T72]      ___sys_sendmsg+0xee/0x170
[  719.080057][   T72]      __sys_sendmsg+0xcd/0x170
[  719.080057][   T72]      do_syscall_64+0xc6/0x1e0
[  719.080057][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.080057][   T72] 
[  719.081731][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  719.081979][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  719.081979][   T72]      dst_init+0x84/0x4a0
[  719.081979][   T72]      dst_alloc+0x97/0x150
[  719.081979][   T72]      ip6_dst_alloc+0x23/0x90
[  719.081979][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  719.081979][   T72]      ip6_pol_route+0x56f/0x840
[  719.081979][   T72]      fib6_rule_lookup+0x227/0x600
[  719.081979][   T72]      ip6_route_output_flags+0x251/0x460
[  719.081979][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  719.081979][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  719.081979][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  719.081979][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  719.081979][   T72]      ip6_datagram_connect+0x2c/0x50
[  719.081979][   T72]      __sys_connect+0x217/0x2a0
[  719.081979][   T72]      __x64_sys_connect+0x72/0xb0
[  719.081979][   T72]      do_syscall_64+0xc6/0x1e0
[  719.081979][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  719.081979][   T72] 
[  729.324666][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  729.325083][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  729.325083][   T72]      netdev_get_by_index+0x5e/0x80
[  729.325083][   T72]      fib6_nh_init+0x3d8/0x15b0
[  729.325083][   T72]      ip6_route_info_create+0xf18/0x17d0
[  729.325083][   T72]      addrconf_f6i_alloc+0x244/0x410
[  729.325083][   T72]      ipv6_add_addr+0x411/0x2000
[  729.325083][   T72]      inet6_addr_add+0x30e/0xa40
[  729.325083][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  729.325083][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.325083][   T72]      netlink_rcv_skb+0x130/0x360
[  729.325083][   T72]      netlink_unicast+0x449/0x710
[  729.325083][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.325083][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.325083][   T72]      ___sys_sendmsg+0xee/0x170
[  729.325083][   T72]      __sys_sendmsg+0xcd/0x170
[  729.325083][   T72]      do_syscall_64+0xc6/0x1e0
[  729.325083][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.325083][   T72] 
[  729.327102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  729.327102][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  729.327102][   T72]      ipv6_find_idev+0x102/0x170
[  729.327102][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  729.327102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.327102][   T72]      netlink_rcv_skb+0x130/0x360
[  729.327102][   T72]      netlink_unicast+0x449/0x710
[  729.327102][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.327102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.327102][   T72]      ___sys_sendmsg+0xee/0x170
[  729.327102][   T72]      __sys_sendmsg+0xcd/0x170
[  729.327102][   T72]      do_syscall_64+0xc6/0x1e0
[  729.327102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.327102][   T72] 
[  729.328631][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  729.328631][   T72]      neigh_parms_alloc+0x1e5/0x510
[  729.328631][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  729.328631][   T72]      ipv6_find_idev+0x102/0x170
[  729.328631][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  729.328631][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.328631][   T72]      netlink_rcv_skb+0x130/0x360
[  729.328631][   T72]      netlink_unicast+0x449/0x710
[  729.328631][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.328631][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.328631][   T72]      ___sys_sendmsg+0xee/0x170
[  729.328631][   T72]      __sys_sendmsg+0xcd/0x170
[  729.328631][   T72]      do_syscall_64+0xc6/0x1e0
[  729.328631][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.328631][   T72] 
[  729.330317][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  729.330600][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  729.330600][   T72]      netdev_get_by_index+0x5e/0x80
[  729.330600][   T72]      fib6_nh_init+0x3d8/0x15b0
[  729.330600][   T72]      ip6_route_info_create+0xf18/0x17d0
[  729.330600][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  729.330600][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  729.330600][   T72]      addrconf_join_anycast+0x1c0/0x220
[  729.330600][   T72]      dev_forward_change+0x2a6/0x7b0
[  729.330600][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  729.330600][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  729.330600][   T72]      proc_sys_call_handler+0x403/0x5e0
[  729.330600][   T72]      vfs_write+0x9e5/0x10a0
[  729.330600][   T72]      ksys_write+0xf5/0x1e0
[  729.330600][   T72]      do_syscall_64+0xc6/0x1e0
[  729.330600][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.330600][   T72] 
[  729.332442][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  729.332442][   T72]      netdev_get_by_index+0x5e/0x80
[  729.332442][   T72]      fib6_nh_init+0x3d8/0x15b0
[  729.332442][   T72]      ip6_route_info_create+0xf18/0x17d0
[  729.332442][   T72]      addrconf_f6i_alloc+0x244/0x410
[  729.332442][   T72]      ipv6_add_addr+0x411/0x2000
[  729.332442][   T72]      inet6_addr_add+0x30e/0xa40
[  729.332442][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  729.332442][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.332442][   T72]      netlink_rcv_skb+0x130/0x360
[  729.332442][   T72]      netlink_unicast+0x449/0x710
[  729.332442][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.332442][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.332442][   T72]      ___sys_sendmsg+0xee/0x170
[  729.332442][   T72]      __sys_sendmsg+0xcd/0x170
[  729.332442][   T72]      do_syscall_64+0xc6/0x1e0
[  729.332442][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.332442][   T72] 
[  729.334415][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  729.334415][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  729.334415][   T72]      ipv6_find_idev+0x102/0x170
[  729.334415][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  729.334415][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.334415][   T72]      netlink_rcv_skb+0x130/0x360
[  729.334415][   T72]      netlink_unicast+0x449/0x710
[  729.334415][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.334415][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.334415][   T72]      ___sys_sendmsg+0xee/0x170
[  729.334415][   T72]      __sys_sendmsg+0xcd/0x170
[  729.334415][   T72]      do_syscall_64+0xc6/0x1e0
[  729.334415][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.334415][   T72] 
[  729.335940][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  729.335940][   T72]      neigh_parms_alloc+0x1e5/0x510
[  729.335940][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  729.335940][   T72]      ipv6_find_idev+0x102/0x170
[  729.335940][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  729.335940][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  729.335940][   T72]      netlink_rcv_skb+0x130/0x360
[  729.335940][   T72]      netlink_unicast+0x449/0x710
[  729.335940][   T72]      netlink_sendmsg+0x723/0xbe0
[  729.335940][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  729.335940][   T72]      ___sys_sendmsg+0xee/0x170
[  729.335940][   T72]      __sys_sendmsg+0xcd/0x170
[  729.335940][   T72]      do_syscall_64+0xc6/0x1e0
[  729.335940][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.335940][   T72] 
[  729.337618][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  729.337859][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  729.337859][   T72]      dst_init+0x84/0x4a0
[  729.337859][   T72]      dst_alloc+0x97/0x150
[  729.337859][   T72]      ip6_dst_alloc+0x23/0x90
[  729.337859][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  729.337859][   T72]      ip6_pol_route+0x56f/0x840
[  729.337859][   T72]      fib6_rule_lookup+0x227/0x600
[  729.337859][   T72]      ip6_route_output_flags+0x251/0x460
[  729.337859][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  729.337859][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  729.337859][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  729.337859][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  729.337859][   T72]      ip6_datagram_connect+0x2c/0x50
[  729.337859][   T72]      __sys_connect+0x217/0x2a0
[  729.337859][   T72]      __x64_sys_connect+0x72/0xb0
[  729.337859][   T72]      do_syscall_64+0xc6/0x1e0
[  729.337859][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  729.337859][   T72] 
[  738.596685][   T42] INFO: task modprobe:1562 blocked for more than 245 seconds.
[  738.597001][   T42]       Not tainted 6.8.0-virtme #1
[  738.597150][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  738.597398][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[  738.597745][   T42] Call Trace:
[  738.597864][   T42]  <TASK>
[  738.597956][   T42]  __schedule+0x705/0x1ac0
[  738.598129][   T42]  ? __pfx___schedule+0x10/0x10
[  738.598281][   T42]  ? schedule+0x1a5/0x210
[  738.598399][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  738.598565][   T42]  ? mark_lock+0x38/0x3e0
[  738.598675][   T42]  ? do_raw_spin_lock+0x131/0x270
[  738.598802][   T42]  ? schedule+0x1a5/0x210
[  738.598939][   T42]  schedule+0xdf/0x210
[  738.599057][   T42]  schedule_preempt_disabled+0x15/0x30
[  738.599209][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[  738.599369][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[  738.599567][   T42]  ? kasan_save_stack+0x34/0x50
[  738.599732][   T42]  ? kasan_save_stack+0x24/0x50
[  738.599884][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  738.600044][   T42]  ? lock_acquire+0x1c1/0x220
[  738.600194][   T42]  ? register_pernet_subsys+0x1a/0x50
[  738.600360][   T42]  down_write+0x1c9/0x200
[  738.600490][   T42]  ? __pfx_down_write+0x10/0x10
[  738.600654][   T42]  ? __pfx___lock_release+0x10/0x10
[  738.600811][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[  738.601041][   T42]  register_pernet_subsys+0x1a/0x50
[  738.601196][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[  738.601411][   T42]  do_one_initcall+0xc8/0x3f0
[  738.601572][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[  738.601741][   T42]  ? __create_object+0x5e/0xb0
[  738.601901][   T42]  ? kasan_unpoison+0x27/0x60
[  738.602058][   T42]  do_init_module+0x233/0x740
[  738.602220][   T42]  load_module+0x16b5/0x2350
[  738.602384][   T42]  ? __pfx_load_module+0x10/0x10
[  738.602552][   T42]  ? kernel_read_file+0x3d2/0x520
[  738.602735][   T42]  ? kernel_read_file+0x300/0x520
[  738.602892][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[  738.603056][   T42]  ? init_module_from_file+0xd2/0x130
[  738.603206][   T42]  init_module_from_file+0xd2/0x130
[  738.603361][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[  738.603551][   T42]  ? __lock_release+0x103/0x460
[  738.603715][   T42]  ? idempotent_init_module+0x32a/0x620
[  738.603880][   T42]  ? idempotent_init_module+0x32a/0x620
[  738.604033][   T42]  ? do_raw_spin_unlock+0x58/0x220
[  738.604186][   T42]  idempotent_init_module+0x342/0x620
[  738.604339][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[  738.604554][   T42]  __x64_sys_finit_module+0xbe/0x130
[  738.604722][   T42]  do_syscall_64+0xc6/0x1e0
[  738.604878][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  738.605067][   T42] RIP: 0033:0x7ff3fdc10e5d
[  738.605228][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  738.605454][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[  738.605697][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[  738.605921][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[  738.606147][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[  738.606369][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[  738.606641][   T42]  </TASK>
[  738.606766][   T42] 
[  738.606766][   T42] Showing all locks held in the system:
[  738.606990][   T42] 1 lock held by khungtaskd/42:
[  738.607143][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[  738.607415][   T42] 3 locks held by kworker/u16:1/72:
[  738.607566][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  738.607882][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  738.608151][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[  738.608423][   T42] 2 locks held by kworker/u20:3/1240:
[  738.608571][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  738.608883][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  738.609223][   T42] 1 lock held by modprobe/1562:
[  738.609374][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[  738.609689][   T42] 
[  738.609765][   T42] =============================================
[  738.609765][   T42] 
[  739.580712][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  739.581097][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  739.581097][   T72]      netdev_get_by_index+0x5e/0x80
[  739.581097][   T72]      fib6_nh_init+0x3d8/0x15b0
[  739.581097][   T72]      ip6_route_info_create+0xf18/0x17d0
[  739.581097][   T72]      addrconf_f6i_alloc+0x244/0x410
[  739.581097][   T72]      ipv6_add_addr+0x411/0x2000
[  739.581097][   T72]      inet6_addr_add+0x30e/0xa40
[  739.581097][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  739.581097][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.581097][   T72]      netlink_rcv_skb+0x130/0x360
[  739.581097][   T72]      netlink_unicast+0x449/0x710
[  739.581097][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.581097][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.581097][   T72]      ___sys_sendmsg+0xee/0x170
[  739.581097][   T72]      __sys_sendmsg+0xcd/0x170
[  739.581097][   T72]      do_syscall_64+0xc6/0x1e0
[  739.581097][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.581097][   T72] 
[  739.583105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  739.583105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  739.583105][   T72]      ipv6_find_idev+0x102/0x170
[  739.583105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  739.583105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.583105][   T72]      netlink_rcv_skb+0x130/0x360
[  739.583105][   T72]      netlink_unicast+0x449/0x710
[  739.583105][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.583105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.583105][   T72]      ___sys_sendmsg+0xee/0x170
[  739.583105][   T72]      __sys_sendmsg+0xcd/0x170
[  739.583105][   T72]      do_syscall_64+0xc6/0x1e0
[  739.583105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.583105][   T72] 
[  739.584634][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  739.584634][   T72]      neigh_parms_alloc+0x1e5/0x510
[  739.584634][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  739.584634][   T72]      ipv6_find_idev+0x102/0x170
[  739.584634][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  739.584634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.584634][   T72]      netlink_rcv_skb+0x130/0x360
[  739.584634][   T72]      netlink_unicast+0x449/0x710
[  739.584634][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.584634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.584634][   T72]      ___sys_sendmsg+0xee/0x170
[  739.584634][   T72]      __sys_sendmsg+0xcd/0x170
[  739.584634][   T72]      do_syscall_64+0xc6/0x1e0
[  739.584634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.584634][   T72] 
[  739.586318][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  739.586597][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  739.586597][   T72]      netdev_get_by_index+0x5e/0x80
[  739.586597][   T72]      fib6_nh_init+0x3d8/0x15b0
[  739.586597][   T72]      ip6_route_info_create+0xf18/0x17d0
[  739.586597][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  739.586597][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  739.586597][   T72]      addrconf_join_anycast+0x1c0/0x220
[  739.586597][   T72]      dev_forward_change+0x2a6/0x7b0
[  739.586597][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  739.586597][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  739.586597][   T72]      proc_sys_call_handler+0x403/0x5e0
[  739.586597][   T72]      vfs_write+0x9e5/0x10a0
[  739.586597][   T72]      ksys_write+0xf5/0x1e0
[  739.586597][   T72]      do_syscall_64+0xc6/0x1e0
[  739.586597][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.586597][   T72] 
[  739.588453][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  739.588453][   T72]      netdev_get_by_index+0x5e/0x80
[  739.588453][   T72]      fib6_nh_init+0x3d8/0x15b0
[  739.588453][   T72]      ip6_route_info_create+0xf18/0x17d0
[  739.588453][   T72]      addrconf_f6i_alloc+0x244/0x410
[  739.588453][   T72]      ipv6_add_addr+0x411/0x2000
[  739.588453][   T72]      inet6_addr_add+0x30e/0xa40
[  739.588453][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  739.588453][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.588453][   T72]      netlink_rcv_skb+0x130/0x360
[  739.588453][   T72]      netlink_unicast+0x449/0x710
[  739.588453][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.588453][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.588453][   T72]      ___sys_sendmsg+0xee/0x170
[  739.588453][   T72]      __sys_sendmsg+0xcd/0x170
[  739.588453][   T72]      do_syscall_64+0xc6/0x1e0
[  739.588453][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.588453][   T72] 
[  739.590431][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  739.590431][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  739.590431][   T72]      ipv6_find_idev+0x102/0x170
[  739.590431][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  739.590431][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.590431][   T72]      netlink_rcv_skb+0x130/0x360
[  739.590431][   T72]      netlink_unicast+0x449/0x710
[  739.590431][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.590431][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.590431][   T72]      ___sys_sendmsg+0xee/0x170
[  739.590431][   T72]      __sys_sendmsg+0xcd/0x170
[  739.590431][   T72]      do_syscall_64+0xc6/0x1e0
[  739.590431][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.590431][   T72] 
[  739.591957][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  739.591957][   T72]      neigh_parms_alloc+0x1e5/0x510
[  739.591957][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  739.591957][   T72]      ipv6_find_idev+0x102/0x170
[  739.591957][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  739.591957][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  739.591957][   T72]      netlink_rcv_skb+0x130/0x360
[  739.591957][   T72]      netlink_unicast+0x449/0x710
[  739.591957][   T72]      netlink_sendmsg+0x723/0xbe0
[  739.591957][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  739.591957][   T72]      ___sys_sendmsg+0xee/0x170
[  739.591957][   T72]      __sys_sendmsg+0xcd/0x170
[  739.591957][   T72]      do_syscall_64+0xc6/0x1e0
[  739.591957][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.591957][   T72] 
[  739.593632][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  739.593872][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  739.593872][   T72]      dst_init+0x84/0x4a0
[  739.593872][   T72]      dst_alloc+0x97/0x150
[  739.593872][   T72]      ip6_dst_alloc+0x23/0x90
[  739.593872][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  739.593872][   T72]      ip6_pol_route+0x56f/0x840
[  739.593872][   T72]      fib6_rule_lookup+0x227/0x600
[  739.593872][   T72]      ip6_route_output_flags+0x251/0x460
[  739.593872][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  739.593872][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  739.593872][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  739.593872][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  739.593872][   T72]      ip6_datagram_connect+0x2c/0x50
[  739.593872][   T72]      __sys_connect+0x217/0x2a0
[  739.593872][   T72]      __x64_sys_connect+0x72/0xb0
[  739.593872][   T72]      do_syscall_64+0xc6/0x1e0
[  739.593872][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  739.593872][   T72] 
[  749.836673][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  749.837122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  749.837122][   T72]      netdev_get_by_index+0x5e/0x80
[  749.837122][   T72]      fib6_nh_init+0x3d8/0x15b0
[  749.837122][   T72]      ip6_route_info_create+0xf18/0x17d0
[  749.837122][   T72]      addrconf_f6i_alloc+0x244/0x410
[  749.837122][   T72]      ipv6_add_addr+0x411/0x2000
[  749.837122][   T72]      inet6_addr_add+0x30e/0xa40
[  749.837122][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  749.837122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.837122][   T72]      netlink_rcv_skb+0x130/0x360
[  749.837122][   T72]      netlink_unicast+0x449/0x710
[  749.837122][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.837122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.837122][   T72]      ___sys_sendmsg+0xee/0x170
[  749.837122][   T72]      __sys_sendmsg+0xcd/0x170
[  749.837122][   T72]      do_syscall_64+0xc6/0x1e0
[  749.837122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.837122][   T72] 
[  749.839163][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  749.839163][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  749.839163][   T72]      ipv6_find_idev+0x102/0x170
[  749.839163][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  749.839163][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.839163][   T72]      netlink_rcv_skb+0x130/0x360
[  749.839163][   T72]      netlink_unicast+0x449/0x710
[  749.839163][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.839163][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.839163][   T72]      ___sys_sendmsg+0xee/0x170
[  749.839163][   T72]      __sys_sendmsg+0xcd/0x170
[  749.839163][   T72]      do_syscall_64+0xc6/0x1e0
[  749.839163][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.839163][   T72] 
[  749.840716][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  749.840716][   T72]      neigh_parms_alloc+0x1e5/0x510
[  749.840716][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  749.840716][   T72]      ipv6_find_idev+0x102/0x170
[  749.840716][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  749.840716][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.840716][   T72]      netlink_rcv_skb+0x130/0x360
[  749.840716][   T72]      netlink_unicast+0x449/0x710
[  749.840716][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.840716][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.840716][   T72]      ___sys_sendmsg+0xee/0x170
[  749.840716][   T72]      __sys_sendmsg+0xcd/0x170
[  749.840716][   T72]      do_syscall_64+0xc6/0x1e0
[  749.840716][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.840716][   T72] 
[  749.842416][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  749.842705][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  749.842705][   T72]      netdev_get_by_index+0x5e/0x80
[  749.842705][   T72]      fib6_nh_init+0x3d8/0x15b0
[  749.842705][   T72]      ip6_route_info_create+0xf18/0x17d0
[  749.842705][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  749.842705][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  749.842705][   T72]      addrconf_join_anycast+0x1c0/0x220
[  749.842705][   T72]      dev_forward_change+0x2a6/0x7b0
[  749.842705][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  749.842705][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  749.842705][   T72]      proc_sys_call_handler+0x403/0x5e0
[  749.842705][   T72]      vfs_write+0x9e5/0x10a0
[  749.842705][   T72]      ksys_write+0xf5/0x1e0
[  749.842705][   T72]      do_syscall_64+0xc6/0x1e0
[  749.842705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.842705][   T72] 
[  749.844583][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  749.844583][   T72]      netdev_get_by_index+0x5e/0x80
[  749.844583][   T72]      fib6_nh_init+0x3d8/0x15b0
[  749.844583][   T72]      ip6_route_info_create+0xf18/0x17d0
[  749.844583][   T72]      addrconf_f6i_alloc+0x244/0x410
[  749.844583][   T72]      ipv6_add_addr+0x411/0x2000
[  749.844583][   T72]      inet6_addr_add+0x30e/0xa40
[  749.844583][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  749.844583][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.844583][   T72]      netlink_rcv_skb+0x130/0x360
[  749.844583][   T72]      netlink_unicast+0x449/0x710
[  749.844583][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.844583][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.844583][   T72]      ___sys_sendmsg+0xee/0x170
[  749.844583][   T72]      __sys_sendmsg+0xcd/0x170
[  749.844583][   T72]      do_syscall_64+0xc6/0x1e0
[  749.844583][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.844583][   T72] 
[  749.846617][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  749.846617][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  749.846617][   T72]      ipv6_find_idev+0x102/0x170
[  749.846617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  749.846617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.846617][   T72]      netlink_rcv_skb+0x130/0x360
[  749.846617][   T72]      netlink_unicast+0x449/0x710
[  749.846617][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.846617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.846617][   T72]      ___sys_sendmsg+0xee/0x170
[  749.846617][   T72]      __sys_sendmsg+0xcd/0x170
[  749.846617][   T72]      do_syscall_64+0xc6/0x1e0
[  749.846617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.846617][   T72] 
[  749.848192][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  749.848192][   T72]      neigh_parms_alloc+0x1e5/0x510
[  749.848192][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  749.848192][   T72]      ipv6_find_idev+0x102/0x170
[  749.848192][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  749.848192][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  749.848192][   T72]      netlink_rcv_skb+0x130/0x360
[  749.848192][   T72]      netlink_unicast+0x449/0x710
[  749.848192][   T72]      netlink_sendmsg+0x723/0xbe0
[  749.848192][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  749.848192][   T72]      ___sys_sendmsg+0xee/0x170
[  749.848192][   T72]      __sys_sendmsg+0xcd/0x170
[  749.848192][   T72]      do_syscall_64+0xc6/0x1e0
[  749.848192][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.848192][   T72] 
[  749.849906][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  749.850154][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  749.850154][   T72]      dst_init+0x84/0x4a0
[  749.850154][   T72]      dst_alloc+0x97/0x150
[  749.850154][   T72]      ip6_dst_alloc+0x23/0x90
[  749.850154][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  749.850154][   T72]      ip6_pol_route+0x56f/0x840
[  749.850154][   T72]      fib6_rule_lookup+0x227/0x600
[  749.850154][   T72]      ip6_route_output_flags+0x251/0x460
[  749.850154][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  749.850154][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  749.850154][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  749.850154][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  749.850154][   T72]      ip6_datagram_connect+0x2c/0x50
[  749.850154][   T72]      __sys_connect+0x217/0x2a0
[  749.850154][   T72]      __x64_sys_connect+0x72/0xb0
[  749.850154][   T72]      do_syscall_64+0xc6/0x1e0
[  749.850154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  749.850154][   T72] 
[  760.092647][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  760.093110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  760.093110][   T72]      netdev_get_by_index+0x5e/0x80
[  760.093110][   T72]      fib6_nh_init+0x3d8/0x15b0
[  760.093110][   T72]      ip6_route_info_create+0xf18/0x17d0
[  760.093110][   T72]      addrconf_f6i_alloc+0x244/0x410
[  760.093110][   T72]      ipv6_add_addr+0x411/0x2000
[  760.093110][   T72]      inet6_addr_add+0x30e/0xa40
[  760.093110][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  760.093110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.093110][   T72]      netlink_rcv_skb+0x130/0x360
[  760.093110][   T72]      netlink_unicast+0x449/0x710
[  760.093110][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.093110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.093110][   T72]      ___sys_sendmsg+0xee/0x170
[  760.093110][   T72]      __sys_sendmsg+0xcd/0x170
[  760.093110][   T72]      do_syscall_64+0xc6/0x1e0
[  760.093110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.093110][   T72] 
[  760.095123][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  760.095123][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  760.095123][   T72]      ipv6_find_idev+0x102/0x170
[  760.095123][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  760.095123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.095123][   T72]      netlink_rcv_skb+0x130/0x360
[  760.095123][   T72]      netlink_unicast+0x449/0x710
[  760.095123][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.095123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.095123][   T72]      ___sys_sendmsg+0xee/0x170
[  760.095123][   T72]      __sys_sendmsg+0xcd/0x170
[  760.095123][   T72]      do_syscall_64+0xc6/0x1e0
[  760.095123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.095123][   T72] 
[  760.096671][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  760.096671][   T72]      neigh_parms_alloc+0x1e5/0x510
[  760.096671][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  760.096671][   T72]      ipv6_find_idev+0x102/0x170
[  760.096671][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  760.096671][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.096671][   T72]      netlink_rcv_skb+0x130/0x360
[  760.096671][   T72]      netlink_unicast+0x449/0x710
[  760.096671][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.096671][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.096671][   T72]      ___sys_sendmsg+0xee/0x170
[  760.096671][   T72]      __sys_sendmsg+0xcd/0x170
[  760.096671][   T72]      do_syscall_64+0xc6/0x1e0
[  760.096671][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.096671][   T72] 
[  760.098365][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  760.098658][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  760.098658][   T72]      netdev_get_by_index+0x5e/0x80
[  760.098658][   T72]      fib6_nh_init+0x3d8/0x15b0
[  760.098658][   T72]      ip6_route_info_create+0xf18/0x17d0
[  760.098658][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  760.098658][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  760.098658][   T72]      addrconf_join_anycast+0x1c0/0x220
[  760.098658][   T72]      dev_forward_change+0x2a6/0x7b0
[  760.098658][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  760.098658][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  760.098658][   T72]      proc_sys_call_handler+0x403/0x5e0
[  760.098658][   T72]      vfs_write+0x9e5/0x10a0
[  760.098658][   T72]      ksys_write+0xf5/0x1e0
[  760.098658][   T72]      do_syscall_64+0xc6/0x1e0
[  760.098658][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.098658][   T72] 
[  760.100512][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  760.100512][   T72]      netdev_get_by_index+0x5e/0x80
[  760.100512][   T72]      fib6_nh_init+0x3d8/0x15b0
[  760.100512][   T72]      ip6_route_info_create+0xf18/0x17d0
[  760.100512][   T72]      addrconf_f6i_alloc+0x244/0x410
[  760.100512][   T72]      ipv6_add_addr+0x411/0x2000
[  760.100512][   T72]      inet6_addr_add+0x30e/0xa40
[  760.100512][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  760.100512][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.100512][   T72]      netlink_rcv_skb+0x130/0x360
[  760.100512][   T72]      netlink_unicast+0x449/0x710
[  760.100512][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.100512][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.100512][   T72]      ___sys_sendmsg+0xee/0x170
[  760.100512][   T72]      __sys_sendmsg+0xcd/0x170
[  760.100512][   T72]      do_syscall_64+0xc6/0x1e0
[  760.100512][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.100512][   T72] 
[  760.102501][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  760.102501][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  760.102501][   T72]      ipv6_find_idev+0x102/0x170
[  760.102501][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  760.102501][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.102501][   T72]      netlink_rcv_skb+0x130/0x360
[  760.102501][   T72]      netlink_unicast+0x449/0x710
[  760.102501][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.102501][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.102501][   T72]      ___sys_sendmsg+0xee/0x170
[  760.102501][   T72]      __sys_sendmsg+0xcd/0x170
[  760.102501][   T72]      do_syscall_64+0xc6/0x1e0
[  760.102501][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.102501][   T72] 
[  760.104039][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  760.104039][   T72]      neigh_parms_alloc+0x1e5/0x510
[  760.104039][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  760.104039][   T72]      ipv6_find_idev+0x102/0x170
[  760.104039][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  760.104039][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  760.104039][   T72]      netlink_rcv_skb+0x130/0x360
[  760.104039][   T72]      netlink_unicast+0x449/0x710
[  760.104039][   T72]      netlink_sendmsg+0x723/0xbe0
[  760.104039][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  760.104039][   T72]      ___sys_sendmsg+0xee/0x170
[  760.104039][   T72]      __sys_sendmsg+0xcd/0x170
[  760.104039][   T72]      do_syscall_64+0xc6/0x1e0
[  760.104039][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.104039][   T72] 
[  760.105728][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  760.105969][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  760.105969][   T72]      dst_init+0x84/0x4a0
[  760.105969][   T72]      dst_alloc+0x97/0x150
[  760.105969][   T72]      ip6_dst_alloc+0x23/0x90
[  760.105969][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  760.105969][   T72]      ip6_pol_route+0x56f/0x840
[  760.105969][   T72]      fib6_rule_lookup+0x227/0x600
[  760.105969][   T72]      ip6_route_output_flags+0x251/0x460
[  760.105969][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  760.105969][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  760.105969][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  760.105969][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  760.105969][   T72]      ip6_datagram_connect+0x2c/0x50
[  760.105969][   T72]      __sys_connect+0x217/0x2a0
[  760.105969][   T72]      __x64_sys_connect+0x72/0xb0
[  760.105969][   T72]      do_syscall_64+0xc6/0x1e0
[  760.105969][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  760.105969][   T72] 
[  770.348698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  770.349154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  770.349154][   T72]      netdev_get_by_index+0x5e/0x80
[  770.349154][   T72]      fib6_nh_init+0x3d8/0x15b0
[  770.349154][   T72]      ip6_route_info_create+0xf18/0x17d0
[  770.349154][   T72]      addrconf_f6i_alloc+0x244/0x410
[  770.349154][   T72]      ipv6_add_addr+0x411/0x2000
[  770.349154][   T72]      inet6_addr_add+0x30e/0xa40
[  770.349154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  770.349154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.349154][   T72]      netlink_rcv_skb+0x130/0x360
[  770.349154][   T72]      netlink_unicast+0x449/0x710
[  770.349154][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.349154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.349154][   T72]      ___sys_sendmsg+0xee/0x170
[  770.349154][   T72]      __sys_sendmsg+0xcd/0x170
[  770.349154][   T72]      do_syscall_64+0xc6/0x1e0
[  770.349154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.349154][   T72] 
[  770.351304][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  770.351304][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  770.351304][   T72]      ipv6_find_idev+0x102/0x170
[  770.351304][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  770.351304][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.351304][   T72]      netlink_rcv_skb+0x130/0x360
[  770.351304][   T72]      netlink_unicast+0x449/0x710
[  770.351304][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.351304][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.351304][   T72]      ___sys_sendmsg+0xee/0x170
[  770.351304][   T72]      __sys_sendmsg+0xcd/0x170
[  770.351304][   T72]      do_syscall_64+0xc6/0x1e0
[  770.351304][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.351304][   T72] 
[  770.352862][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  770.352862][   T72]      neigh_parms_alloc+0x1e5/0x510
[  770.352862][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  770.352862][   T72]      ipv6_find_idev+0x102/0x170
[  770.352862][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  770.352862][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.352862][   T72]      netlink_rcv_skb+0x130/0x360
[  770.352862][   T72]      netlink_unicast+0x449/0x710
[  770.352862][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.352862][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.352862][   T72]      ___sys_sendmsg+0xee/0x170
[  770.352862][   T72]      __sys_sendmsg+0xcd/0x170
[  770.352862][   T72]      do_syscall_64+0xc6/0x1e0
[  770.352862][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.352862][   T72] 
[  770.354559][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  770.354844][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  770.354844][   T72]      netdev_get_by_index+0x5e/0x80
[  770.354844][   T72]      fib6_nh_init+0x3d8/0x15b0
[  770.354844][   T72]      ip6_route_info_create+0xf18/0x17d0
[  770.354844][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  770.354844][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  770.354844][   T72]      addrconf_join_anycast+0x1c0/0x220
[  770.354844][   T72]      dev_forward_change+0x2a6/0x7b0
[  770.354844][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  770.354844][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  770.354844][   T72]      proc_sys_call_handler+0x403/0x5e0
[  770.354844][   T72]      vfs_write+0x9e5/0x10a0
[  770.354844][   T72]      ksys_write+0xf5/0x1e0
[  770.354844][   T72]      do_syscall_64+0xc6/0x1e0
[  770.354844][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.354844][   T72] 
[  770.356728][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  770.356728][   T72]      netdev_get_by_index+0x5e/0x80
[  770.356728][   T72]      fib6_nh_init+0x3d8/0x15b0
[  770.356728][   T72]      ip6_route_info_create+0xf18/0x17d0
[  770.356728][   T72]      addrconf_f6i_alloc+0x244/0x410
[  770.356728][   T72]      ipv6_add_addr+0x411/0x2000
[  770.356728][   T72]      inet6_addr_add+0x30e/0xa40
[  770.356728][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  770.356728][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.356728][   T72]      netlink_rcv_skb+0x130/0x360
[  770.356728][   T72]      netlink_unicast+0x449/0x710
[  770.356728][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.356728][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.356728][   T72]      ___sys_sendmsg+0xee/0x170
[  770.356728][   T72]      __sys_sendmsg+0xcd/0x170
[  770.356728][   T72]      do_syscall_64+0xc6/0x1e0
[  770.356728][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.356728][   T72] 
[  770.358728][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  770.358728][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  770.358728][   T72]      ipv6_find_idev+0x102/0x170
[  770.358728][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  770.358728][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.358728][   T72]      netlink_rcv_skb+0x130/0x360
[  770.358728][   T72]      netlink_unicast+0x449/0x710
[  770.358728][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.358728][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.358728][   T72]      ___sys_sendmsg+0xee/0x170
[  770.358728][   T72]      __sys_sendmsg+0xcd/0x170
[  770.358728][   T72]      do_syscall_64+0xc6/0x1e0
[  770.358728][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.358728][   T72] 
[  770.360256][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  770.360256][   T72]      neigh_parms_alloc+0x1e5/0x510
[  770.360256][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  770.360256][   T72]      ipv6_find_idev+0x102/0x170
[  770.360256][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  770.360256][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  770.360256][   T72]      netlink_rcv_skb+0x130/0x360
[  770.360256][   T72]      netlink_unicast+0x449/0x710
[  770.360256][   T72]      netlink_sendmsg+0x723/0xbe0
[  770.360256][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  770.360256][   T72]      ___sys_sendmsg+0xee/0x170
[  770.360256][   T72]      __sys_sendmsg+0xcd/0x170
[  770.360256][   T72]      do_syscall_64+0xc6/0x1e0
[  770.360256][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.360256][   T72] 
[  770.361939][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  770.362177][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  770.362177][   T72]      dst_init+0x84/0x4a0
[  770.362177][   T72]      dst_alloc+0x97/0x150
[  770.362177][   T72]      ip6_dst_alloc+0x23/0x90
[  770.362177][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  770.362177][   T72]      ip6_pol_route+0x56f/0x840
[  770.362177][   T72]      fib6_rule_lookup+0x227/0x600
[  770.362177][   T72]      ip6_route_output_flags+0x251/0x460
[  770.362177][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  770.362177][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  770.362177][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  770.362177][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  770.362177][   T72]      ip6_datagram_connect+0x2c/0x50
[  770.362177][   T72]      __sys_connect+0x217/0x2a0
[  770.362177][   T72]      __x64_sys_connect+0x72/0xb0
[  770.362177][   T72]      do_syscall_64+0xc6/0x1e0
[  770.362177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  770.362177][   T72] 
[  780.604697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  780.605087][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  780.605087][   T72]      netdev_get_by_index+0x5e/0x80
[  780.605087][   T72]      fib6_nh_init+0x3d8/0x15b0
[  780.605087][   T72]      ip6_route_info_create+0xf18/0x17d0
[  780.605087][   T72]      addrconf_f6i_alloc+0x244/0x410
[  780.605087][   T72]      ipv6_add_addr+0x411/0x2000
[  780.605087][   T72]      inet6_addr_add+0x30e/0xa40
[  780.605087][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  780.605087][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.605087][   T72]      netlink_rcv_skb+0x130/0x360
[  780.605087][   T72]      netlink_unicast+0x449/0x710
[  780.605087][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.605087][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.605087][   T72]      ___sys_sendmsg+0xee/0x170
[  780.605087][   T72]      __sys_sendmsg+0xcd/0x170
[  780.605087][   T72]      do_syscall_64+0xc6/0x1e0
[  780.605087][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.605087][   T72] 
[  780.607101][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  780.607101][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  780.607101][   T72]      ipv6_find_idev+0x102/0x170
[  780.607101][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  780.607101][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.607101][   T72]      netlink_rcv_skb+0x130/0x360
[  780.607101][   T72]      netlink_unicast+0x449/0x710
[  780.607101][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.607101][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.607101][   T72]      ___sys_sendmsg+0xee/0x170
[  780.607101][   T72]      __sys_sendmsg+0xcd/0x170
[  780.607101][   T72]      do_syscall_64+0xc6/0x1e0
[  780.607101][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.607101][   T72] 
[  780.608631][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  780.608631][   T72]      neigh_parms_alloc+0x1e5/0x510
[  780.608631][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  780.608631][   T72]      ipv6_find_idev+0x102/0x170
[  780.608631][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  780.608631][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.608631][   T72]      netlink_rcv_skb+0x130/0x360
[  780.608631][   T72]      netlink_unicast+0x449/0x710
[  780.608631][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.608631][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.608631][   T72]      ___sys_sendmsg+0xee/0x170
[  780.608631][   T72]      __sys_sendmsg+0xcd/0x170
[  780.608631][   T72]      do_syscall_64+0xc6/0x1e0
[  780.608631][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.608631][   T72] 
[  780.610320][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  780.610589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  780.610589][   T72]      netdev_get_by_index+0x5e/0x80
[  780.610589][   T72]      fib6_nh_init+0x3d8/0x15b0
[  780.610589][   T72]      ip6_route_info_create+0xf18/0x17d0
[  780.610589][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  780.610589][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  780.610589][   T72]      addrconf_join_anycast+0x1c0/0x220
[  780.610589][   T72]      dev_forward_change+0x2a6/0x7b0
[  780.610589][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  780.610589][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  780.610589][   T72]      proc_sys_call_handler+0x403/0x5e0
[  780.610589][   T72]      vfs_write+0x9e5/0x10a0
[  780.610589][   T72]      ksys_write+0xf5/0x1e0
[  780.610589][   T72]      do_syscall_64+0xc6/0x1e0
[  780.610589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.610589][   T72] 
[  780.612422][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  780.612422][   T72]      netdev_get_by_index+0x5e/0x80
[  780.612422][   T72]      fib6_nh_init+0x3d8/0x15b0
[  780.612422][   T72]      ip6_route_info_create+0xf18/0x17d0
[  780.612422][   T72]      addrconf_f6i_alloc+0x244/0x410
[  780.612422][   T72]      ipv6_add_addr+0x411/0x2000
[  780.612422][   T72]      inet6_addr_add+0x30e/0xa40
[  780.612422][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  780.612422][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.612422][   T72]      netlink_rcv_skb+0x130/0x360
[  780.612422][   T72]      netlink_unicast+0x449/0x710
[  780.612422][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.612422][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.612422][   T72]      ___sys_sendmsg+0xee/0x170
[  780.612422][   T72]      __sys_sendmsg+0xcd/0x170
[  780.612422][   T72]      do_syscall_64+0xc6/0x1e0
[  780.612422][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.612422][   T72] 
[  780.614448][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  780.614448][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  780.614448][   T72]      ipv6_find_idev+0x102/0x170
[  780.614448][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  780.614448][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.614448][   T72]      netlink_rcv_skb+0x130/0x360
[  780.614448][   T72]      netlink_unicast+0x449/0x710
[  780.614448][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.614448][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.614448][   T72]      ___sys_sendmsg+0xee/0x170
[  780.614448][   T72]      __sys_sendmsg+0xcd/0x170
[  780.614448][   T72]      do_syscall_64+0xc6/0x1e0
[  780.614448][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.614448][   T72] 
[  780.615993][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  780.615993][   T72]      neigh_parms_alloc+0x1e5/0x510
[  780.615993][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  780.615993][   T72]      ipv6_find_idev+0x102/0x170
[  780.615993][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  780.615993][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  780.615993][   T72]      netlink_rcv_skb+0x130/0x360
[  780.615993][   T72]      netlink_unicast+0x449/0x710
[  780.615993][   T72]      netlink_sendmsg+0x723/0xbe0
[  780.615993][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  780.615993][   T72]      ___sys_sendmsg+0xee/0x170
[  780.615993][   T72]      __sys_sendmsg+0xcd/0x170
[  780.615993][   T72]      do_syscall_64+0xc6/0x1e0
[  780.615993][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.615993][   T72] 
[  780.617687][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  780.617929][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  780.617929][   T72]      dst_init+0x84/0x4a0
[  780.617929][   T72]      dst_alloc+0x97/0x150
[  780.617929][   T72]      ip6_dst_alloc+0x23/0x90
[  780.617929][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  780.617929][   T72]      ip6_pol_route+0x56f/0x840
[  780.617929][   T72]      fib6_rule_lookup+0x227/0x600
[  780.617929][   T72]      ip6_route_output_flags+0x251/0x460
[  780.617929][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  780.617929][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  780.617929][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  780.617929][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  780.617929][   T72]      ip6_datagram_connect+0x2c/0x50
[  780.617929][   T72]      __sys_connect+0x217/0x2a0
[  780.617929][   T72]      __x64_sys_connect+0x72/0xb0
[  780.617929][   T72]      do_syscall_64+0xc6/0x1e0
[  780.617929][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  780.617929][   T72] 
[  790.732663][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  790.733078][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  790.733078][   T72]      netdev_get_by_index+0x5e/0x80
[  790.733078][   T72]      fib6_nh_init+0x3d8/0x15b0
[  790.733078][   T72]      ip6_route_info_create+0xf18/0x17d0
[  790.733078][   T72]      addrconf_f6i_alloc+0x244/0x410
[  790.733078][   T72]      ipv6_add_addr+0x411/0x2000
[  790.733078][   T72]      inet6_addr_add+0x30e/0xa40
[  790.733078][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  790.733078][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.733078][   T72]      netlink_rcv_skb+0x130/0x360
[  790.733078][   T72]      netlink_unicast+0x449/0x710
[  790.733078][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.733078][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.733078][   T72]      ___sys_sendmsg+0xee/0x170
[  790.733078][   T72]      __sys_sendmsg+0xcd/0x170
[  790.733078][   T72]      do_syscall_64+0xc6/0x1e0
[  790.733078][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.733078][   T72] 
[  790.735160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  790.735160][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  790.735160][   T72]      ipv6_find_idev+0x102/0x170
[  790.735160][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  790.735160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.735160][   T72]      netlink_rcv_skb+0x130/0x360
[  790.735160][   T72]      netlink_unicast+0x449/0x710
[  790.735160][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.735160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.735160][   T72]      ___sys_sendmsg+0xee/0x170
[  790.735160][   T72]      __sys_sendmsg+0xcd/0x170
[  790.735160][   T72]      do_syscall_64+0xc6/0x1e0
[  790.735160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.735160][   T72] 
[  790.736710][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  790.736710][   T72]      neigh_parms_alloc+0x1e5/0x510
[  790.736710][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  790.736710][   T72]      ipv6_find_idev+0x102/0x170
[  790.736710][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  790.736710][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.736710][   T72]      netlink_rcv_skb+0x130/0x360
[  790.736710][   T72]      netlink_unicast+0x449/0x710
[  790.736710][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.736710][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.736710][   T72]      ___sys_sendmsg+0xee/0x170
[  790.736710][   T72]      __sys_sendmsg+0xcd/0x170
[  790.736710][   T72]      do_syscall_64+0xc6/0x1e0
[  790.736710][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.736710][   T72] 
[  790.738402][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  790.738689][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  790.738689][   T72]      netdev_get_by_index+0x5e/0x80
[  790.738689][   T72]      fib6_nh_init+0x3d8/0x15b0
[  790.738689][   T72]      ip6_route_info_create+0xf18/0x17d0
[  790.738689][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  790.738689][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  790.738689][   T72]      addrconf_join_anycast+0x1c0/0x220
[  790.738689][   T72]      dev_forward_change+0x2a6/0x7b0
[  790.738689][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  790.738689][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  790.738689][   T72]      proc_sys_call_handler+0x403/0x5e0
[  790.738689][   T72]      vfs_write+0x9e5/0x10a0
[  790.738689][   T72]      ksys_write+0xf5/0x1e0
[  790.738689][   T72]      do_syscall_64+0xc6/0x1e0
[  790.738689][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.738689][   T72] 
[  790.740597][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  790.740597][   T72]      netdev_get_by_index+0x5e/0x80
[  790.740597][   T72]      fib6_nh_init+0x3d8/0x15b0
[  790.740597][   T72]      ip6_route_info_create+0xf18/0x17d0
[  790.740597][   T72]      addrconf_f6i_alloc+0x244/0x410
[  790.740597][   T72]      ipv6_add_addr+0x411/0x2000
[  790.740597][   T72]      inet6_addr_add+0x30e/0xa40
[  790.740597][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  790.740597][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.740597][   T72]      netlink_rcv_skb+0x130/0x360
[  790.740597][   T72]      netlink_unicast+0x449/0x710
[  790.740597][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.740597][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.740597][   T72]      ___sys_sendmsg+0xee/0x170
[  790.740597][   T72]      __sys_sendmsg+0xcd/0x170
[  790.740597][   T72]      do_syscall_64+0xc6/0x1e0
[  790.740597][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.740597][   T72] 
[  790.742688][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  790.742688][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  790.742688][   T72]      ipv6_find_idev+0x102/0x170
[  790.742688][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  790.742688][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.742688][   T72]      netlink_rcv_skb+0x130/0x360
[  790.742688][   T72]      netlink_unicast+0x449/0x710
[  790.742688][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.742688][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.742688][   T72]      ___sys_sendmsg+0xee/0x170
[  790.742688][   T72]      __sys_sendmsg+0xcd/0x170
[  790.742688][   T72]      do_syscall_64+0xc6/0x1e0
[  790.742688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.742688][   T72] 
[  790.744309][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  790.744309][   T72]      neigh_parms_alloc+0x1e5/0x510
[  790.744309][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  790.744309][   T72]      ipv6_find_idev+0x102/0x170
[  790.744309][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  790.744309][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  790.744309][   T72]      netlink_rcv_skb+0x130/0x360
[  790.744309][   T72]      netlink_unicast+0x449/0x710
[  790.744309][   T72]      netlink_sendmsg+0x723/0xbe0
[  790.744309][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  790.744309][   T72]      ___sys_sendmsg+0xee/0x170
[  790.744309][   T72]      __sys_sendmsg+0xcd/0x170
[  790.744309][   T72]      do_syscall_64+0xc6/0x1e0
[  790.744309][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.744309][   T72] 
[  790.746115][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  790.746391][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  790.746391][   T72]      dst_init+0x84/0x4a0
[  790.746391][   T72]      dst_alloc+0x97/0x150
[  790.746391][   T72]      ip6_dst_alloc+0x23/0x90
[  790.746391][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  790.746391][   T72]      ip6_pol_route+0x56f/0x840
[  790.746391][   T72]      fib6_rule_lookup+0x227/0x600
[  790.746391][   T72]      ip6_route_output_flags+0x251/0x460
[  790.746391][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  790.746391][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  790.746391][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  790.746391][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  790.746391][   T72]      ip6_datagram_connect+0x2c/0x50
[  790.746391][   T72]      __sys_connect+0x217/0x2a0
[  790.746391][   T72]      __x64_sys_connect+0x72/0xb0
[  790.746391][   T72]      do_syscall_64+0xc6/0x1e0
[  790.746391][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  790.746391][   T72] 
[  800.988725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  800.989122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  800.989122][   T72]      netdev_get_by_index+0x5e/0x80
[  800.989122][   T72]      fib6_nh_init+0x3d8/0x15b0
[  800.989122][   T72]      ip6_route_info_create+0xf18/0x17d0
[  800.989122][   T72]      addrconf_f6i_alloc+0x244/0x410
[  800.989122][   T72]      ipv6_add_addr+0x411/0x2000
[  800.989122][   T72]      inet6_addr_add+0x30e/0xa40
[  800.989122][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  800.989122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  800.989122][   T72]      netlink_rcv_skb+0x130/0x360
[  800.989122][   T72]      netlink_unicast+0x449/0x710
[  800.989122][   T72]      netlink_sendmsg+0x723/0xbe0
[  800.989122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  800.989122][   T72]      ___sys_sendmsg+0xee/0x170
[  800.989122][   T72]      __sys_sendmsg+0xcd/0x170
[  800.989122][   T72]      do_syscall_64+0xc6/0x1e0
[  800.989122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.989122][   T72] 
[  800.991177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  800.991177][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  800.991177][   T72]      ipv6_find_idev+0x102/0x170
[  800.991177][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  800.991177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  800.991177][   T72]      netlink_rcv_skb+0x130/0x360
[  800.991177][   T72]      netlink_unicast+0x449/0x710
[  800.991177][   T72]      netlink_sendmsg+0x723/0xbe0
[  800.991177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  800.991177][   T72]      ___sys_sendmsg+0xee/0x170
[  800.991177][   T72]      __sys_sendmsg+0xcd/0x170
[  800.991177][   T72]      do_syscall_64+0xc6/0x1e0
[  800.991177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.991177][   T72] 
[  800.992713][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  800.992713][   T72]      neigh_parms_alloc+0x1e5/0x510
[  800.992713][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  800.992713][   T72]      ipv6_find_idev+0x102/0x170
[  800.992713][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  800.992713][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  800.992713][   T72]      netlink_rcv_skb+0x130/0x360
[  800.992713][   T72]      netlink_unicast+0x449/0x710
[  800.992713][   T72]      netlink_sendmsg+0x723/0xbe0
[  800.992713][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  800.992713][   T72]      ___sys_sendmsg+0xee/0x170
[  800.992713][   T72]      __sys_sendmsg+0xcd/0x170
[  800.992713][   T72]      do_syscall_64+0xc6/0x1e0
[  800.992713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.992713][   T72] 
[  800.994418][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  800.994705][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  800.994705][   T72]      netdev_get_by_index+0x5e/0x80
[  800.994705][   T72]      fib6_nh_init+0x3d8/0x15b0
[  800.994705][   T72]      ip6_route_info_create+0xf18/0x17d0
[  800.994705][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  800.994705][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  800.994705][   T72]      addrconf_join_anycast+0x1c0/0x220
[  800.994705][   T72]      dev_forward_change+0x2a6/0x7b0
[  800.994705][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  800.994705][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  800.994705][   T72]      proc_sys_call_handler+0x403/0x5e0
[  800.994705][   T72]      vfs_write+0x9e5/0x10a0
[  800.994705][   T72]      ksys_write+0xf5/0x1e0
[  800.994705][   T72]      do_syscall_64+0xc6/0x1e0
[  800.994705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.994705][   T72] 
[  800.996591][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  800.996591][   T72]      netdev_get_by_index+0x5e/0x80
[  800.996591][   T72]      fib6_nh_init+0x3d8/0x15b0
[  800.996591][   T72]      ip6_route_info_create+0xf18/0x17d0
[  800.996591][   T72]      addrconf_f6i_alloc+0x244/0x410
[  800.996591][   T72]      ipv6_add_addr+0x411/0x2000
[  800.996591][   T72]      inet6_addr_add+0x30e/0xa40
[  800.996591][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  800.996591][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  800.996591][   T72]      netlink_rcv_skb+0x130/0x360
[  800.996591][   T72]      netlink_unicast+0x449/0x710
[  800.996591][   T72]      netlink_sendmsg+0x723/0xbe0
[  800.996591][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  800.996591][   T72]      ___sys_sendmsg+0xee/0x170
[  800.996591][   T72]      __sys_sendmsg+0xcd/0x170
[  800.996591][   T72]      do_syscall_64+0xc6/0x1e0
[  800.996591][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.996591][   T72] 
[  800.998585][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  800.998585][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  800.998585][   T72]      ipv6_find_idev+0x102/0x170
[  800.998585][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  800.998585][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  800.998585][   T72]      netlink_rcv_skb+0x130/0x360
[  800.998585][   T72]      netlink_unicast+0x449/0x710
[  800.998585][   T72]      netlink_sendmsg+0x723/0xbe0
[  800.998585][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  800.998585][   T72]      ___sys_sendmsg+0xee/0x170
[  800.998585][   T72]      __sys_sendmsg+0xcd/0x170
[  800.998585][   T72]      do_syscall_64+0xc6/0x1e0
[  800.998585][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  800.998585][   T72] 
[  801.000111][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  801.000111][   T72]      neigh_parms_alloc+0x1e5/0x510
[  801.000111][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  801.000111][   T72]      ipv6_find_idev+0x102/0x170
[  801.000111][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  801.000111][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  801.000111][   T72]      netlink_rcv_skb+0x130/0x360
[  801.000111][   T72]      netlink_unicast+0x449/0x710
[  801.000111][   T72]      netlink_sendmsg+0x723/0xbe0
[  801.000111][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  801.000111][   T72]      ___sys_sendmsg+0xee/0x170
[  801.000111][   T72]      __sys_sendmsg+0xcd/0x170
[  801.000111][   T72]      do_syscall_64+0xc6/0x1e0
[  801.000111][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  801.000111][   T72] 
[  801.001791][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  801.002056][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  801.002056][   T72]      dst_init+0x84/0x4a0
[  801.002056][   T72]      dst_alloc+0x97/0x150
[  801.002056][   T72]      ip6_dst_alloc+0x23/0x90
[  801.002056][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  801.002056][   T72]      ip6_pol_route+0x56f/0x840
[  801.002056][   T72]      fib6_rule_lookup+0x227/0x600
[  801.002056][   T72]      ip6_route_output_flags+0x251/0x460
[  801.002056][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  801.002056][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  801.002056][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  801.002056][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  801.002056][   T72]      ip6_datagram_connect+0x2c/0x50
[  801.002056][   T72]      __sys_connect+0x217/0x2a0
[  801.002056][   T72]      __x64_sys_connect+0x72/0xb0
[  801.002056][   T72]      do_syscall_64+0xc6/0x1e0
[  801.002056][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  801.002056][   T72] 
[  811.004781][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  811.005206][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  811.005206][   T72]      netdev_get_by_index+0x5e/0x80
[  811.005206][   T72]      fib6_nh_init+0x3d8/0x15b0
[  811.005206][   T72]      ip6_route_info_create+0xf18/0x17d0
[  811.005206][   T72]      addrconf_f6i_alloc+0x244/0x410
[  811.005206][   T72]      ipv6_add_addr+0x411/0x2000
[  811.005206][   T72]      inet6_addr_add+0x30e/0xa40
[  811.005206][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  811.005206][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.005206][   T72]      netlink_rcv_skb+0x130/0x360
[  811.005206][   T72]      netlink_unicast+0x449/0x710
[  811.005206][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.005206][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.005206][   T72]      ___sys_sendmsg+0xee/0x170
[  811.005206][   T72]      __sys_sendmsg+0xcd/0x170
[  811.005206][   T72]      do_syscall_64+0xc6/0x1e0
[  811.005206][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.005206][   T72] 
[  811.007244][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  811.007244][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  811.007244][   T72]      ipv6_find_idev+0x102/0x170
[  811.007244][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  811.007244][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.007244][   T72]      netlink_rcv_skb+0x130/0x360
[  811.007244][   T72]      netlink_unicast+0x449/0x710
[  811.007244][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.007244][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.007244][   T72]      ___sys_sendmsg+0xee/0x170
[  811.007244][   T72]      __sys_sendmsg+0xcd/0x170
[  811.007244][   T72]      do_syscall_64+0xc6/0x1e0
[  811.007244][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.007244][   T72] 
[  811.008824][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  811.008824][   T72]      neigh_parms_alloc+0x1e5/0x510
[  811.008824][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  811.008824][   T72]      ipv6_find_idev+0x102/0x170
[  811.008824][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  811.008824][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.008824][   T72]      netlink_rcv_skb+0x130/0x360
[  811.008824][   T72]      netlink_unicast+0x449/0x710
[  811.008824][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.008824][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.008824][   T72]      ___sys_sendmsg+0xee/0x170
[  811.008824][   T72]      __sys_sendmsg+0xcd/0x170
[  811.008824][   T72]      do_syscall_64+0xc6/0x1e0
[  811.008824][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.008824][   T72] 
[  811.010569][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  811.010857][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  811.010857][   T72]      netdev_get_by_index+0x5e/0x80
[  811.010857][   T72]      fib6_nh_init+0x3d8/0x15b0
[  811.010857][   T72]      ip6_route_info_create+0xf18/0x17d0
[  811.010857][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  811.010857][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  811.010857][   T72]      addrconf_join_anycast+0x1c0/0x220
[  811.010857][   T72]      dev_forward_change+0x2a6/0x7b0
[  811.010857][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  811.010857][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  811.010857][   T72]      proc_sys_call_handler+0x403/0x5e0
[  811.010857][   T72]      vfs_write+0x9e5/0x10a0
[  811.010857][   T72]      ksys_write+0xf5/0x1e0
[  811.010857][   T72]      do_syscall_64+0xc6/0x1e0
[  811.010857][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.010857][   T72] 
[  811.012752][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  811.012752][   T72]      netdev_get_by_index+0x5e/0x80
[  811.012752][   T72]      fib6_nh_init+0x3d8/0x15b0
[  811.012752][   T72]      ip6_route_info_create+0xf18/0x17d0
[  811.012752][   T72]      addrconf_f6i_alloc+0x244/0x410
[  811.012752][   T72]      ipv6_add_addr+0x411/0x2000
[  811.012752][   T72]      inet6_addr_add+0x30e/0xa40
[  811.012752][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  811.012752][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.012752][   T72]      netlink_rcv_skb+0x130/0x360
[  811.012752][   T72]      netlink_unicast+0x449/0x710
[  811.012752][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.012752][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.012752][   T72]      ___sys_sendmsg+0xee/0x170
[  811.012752][   T72]      __sys_sendmsg+0xcd/0x170
[  811.012752][   T72]      do_syscall_64+0xc6/0x1e0
[  811.012752][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.012752][   T72] 
[  811.014780][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  811.014780][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  811.014780][   T72]      ipv6_find_idev+0x102/0x170
[  811.014780][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  811.014780][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.014780][   T72]      netlink_rcv_skb+0x130/0x360
[  811.014780][   T72]      netlink_unicast+0x449/0x710
[  811.014780][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.014780][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.014780][   T72]      ___sys_sendmsg+0xee/0x170
[  811.014780][   T72]      __sys_sendmsg+0xcd/0x170
[  811.014780][   T72]      do_syscall_64+0xc6/0x1e0
[  811.014780][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.014780][   T72] 
[  811.016350][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  811.016350][   T72]      neigh_parms_alloc+0x1e5/0x510
[  811.016350][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  811.016350][   T72]      ipv6_find_idev+0x102/0x170
[  811.016350][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  811.016350][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  811.016350][   T72]      netlink_rcv_skb+0x130/0x360
[  811.016350][   T72]      netlink_unicast+0x449/0x710
[  811.016350][   T72]      netlink_sendmsg+0x723/0xbe0
[  811.016350][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  811.016350][   T72]      ___sys_sendmsg+0xee/0x170
[  811.016350][   T72]      __sys_sendmsg+0xcd/0x170
[  811.016350][   T72]      do_syscall_64+0xc6/0x1e0
[  811.016350][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.016350][   T72] 
[  811.018101][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  811.018344][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  811.018344][   T72]      dst_init+0x84/0x4a0
[  811.018344][   T72]      dst_alloc+0x97/0x150
[  811.018344][   T72]      ip6_dst_alloc+0x23/0x90
[  811.018344][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  811.018344][   T72]      ip6_pol_route+0x56f/0x840
[  811.018344][   T72]      fib6_rule_lookup+0x227/0x600
[  811.018344][   T72]      ip6_route_output_flags+0x251/0x460
[  811.018344][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  811.018344][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  811.018344][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  811.018344][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  811.018344][   T72]      ip6_datagram_connect+0x2c/0x50
[  811.018344][   T72]      __sys_connect+0x217/0x2a0
[  811.018344][   T72]      __x64_sys_connect+0x72/0xb0
[  811.018344][   T72]      do_syscall_64+0xc6/0x1e0
[  811.018344][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  811.018344][   T72] 
[  821.020655][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  821.021104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  821.021104][   T72]      netdev_get_by_index+0x5e/0x80
[  821.021104][   T72]      fib6_nh_init+0x3d8/0x15b0
[  821.021104][   T72]      ip6_route_info_create+0xf18/0x17d0
[  821.021104][   T72]      addrconf_f6i_alloc+0x244/0x410
[  821.021104][   T72]      ipv6_add_addr+0x411/0x2000
[  821.021104][   T72]      inet6_addr_add+0x30e/0xa40
[  821.021104][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  821.021104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.021104][   T72]      netlink_rcv_skb+0x130/0x360
[  821.021104][   T72]      netlink_unicast+0x449/0x710
[  821.021104][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.021104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.021104][   T72]      ___sys_sendmsg+0xee/0x170
[  821.021104][   T72]      __sys_sendmsg+0xcd/0x170
[  821.021104][   T72]      do_syscall_64+0xc6/0x1e0
[  821.021104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.021104][   T72] 
[  821.023131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  821.023131][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  821.023131][   T72]      ipv6_find_idev+0x102/0x170
[  821.023131][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  821.023131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.023131][   T72]      netlink_rcv_skb+0x130/0x360
[  821.023131][   T72]      netlink_unicast+0x449/0x710
[  821.023131][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.023131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.023131][   T72]      ___sys_sendmsg+0xee/0x170
[  821.023131][   T72]      __sys_sendmsg+0xcd/0x170
[  821.023131][   T72]      do_syscall_64+0xc6/0x1e0
[  821.023131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.023131][   T72] 
[  821.024674][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  821.024674][   T72]      neigh_parms_alloc+0x1e5/0x510
[  821.024674][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  821.024674][   T72]      ipv6_find_idev+0x102/0x170
[  821.024674][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  821.024674][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.024674][   T72]      netlink_rcv_skb+0x130/0x360
[  821.024674][   T72]      netlink_unicast+0x449/0x710
[  821.024674][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.024674][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.024674][   T72]      ___sys_sendmsg+0xee/0x170
[  821.024674][   T72]      __sys_sendmsg+0xcd/0x170
[  821.024674][   T72]      do_syscall_64+0xc6/0x1e0
[  821.024674][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.024674][   T72] 
[  821.026418][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  821.026737][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  821.026737][   T72]      netdev_get_by_index+0x5e/0x80
[  821.026737][   T72]      fib6_nh_init+0x3d8/0x15b0
[  821.026737][   T72]      ip6_route_info_create+0xf18/0x17d0
[  821.026737][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  821.026737][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  821.026737][   T72]      addrconf_join_anycast+0x1c0/0x220
[  821.026737][   T72]      dev_forward_change+0x2a6/0x7b0
[  821.026737][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  821.026737][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  821.026737][   T72]      proc_sys_call_handler+0x403/0x5e0
[  821.026737][   T72]      vfs_write+0x9e5/0x10a0
[  821.026737][   T72]      ksys_write+0xf5/0x1e0
[  821.026737][   T72]      do_syscall_64+0xc6/0x1e0
[  821.026737][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.026737][   T72] 
[  821.028692][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  821.028692][   T72]      netdev_get_by_index+0x5e/0x80
[  821.028692][   T72]      fib6_nh_init+0x3d8/0x15b0
[  821.028692][   T72]      ip6_route_info_create+0xf18/0x17d0
[  821.028692][   T72]      addrconf_f6i_alloc+0x244/0x410
[  821.028692][   T72]      ipv6_add_addr+0x411/0x2000
[  821.028692][   T72]      inet6_addr_add+0x30e/0xa40
[  821.028692][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  821.028692][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.028692][   T72]      netlink_rcv_skb+0x130/0x360
[  821.028692][   T72]      netlink_unicast+0x449/0x710
[  821.028692][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.028692][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.028692][   T72]      ___sys_sendmsg+0xee/0x170
[  821.028692][   T72]      __sys_sendmsg+0xcd/0x170
[  821.028692][   T72]      do_syscall_64+0xc6/0x1e0
[  821.028692][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.028692][   T72] 
[  821.030684][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  821.030684][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  821.030684][   T72]      ipv6_find_idev+0x102/0x170
[  821.030684][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  821.030684][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.030684][   T72]      netlink_rcv_skb+0x130/0x360
[  821.030684][   T72]      netlink_unicast+0x449/0x710
[  821.030684][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.030684][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.030684][   T72]      ___sys_sendmsg+0xee/0x170
[  821.030684][   T72]      __sys_sendmsg+0xcd/0x170
[  821.030684][   T72]      do_syscall_64+0xc6/0x1e0
[  821.030684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.030684][   T72] 
[  821.032221][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  821.032221][   T72]      neigh_parms_alloc+0x1e5/0x510
[  821.032221][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  821.032221][   T72]      ipv6_find_idev+0x102/0x170
[  821.032221][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  821.032221][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  821.032221][   T72]      netlink_rcv_skb+0x130/0x360
[  821.032221][   T72]      netlink_unicast+0x449/0x710
[  821.032221][   T72]      netlink_sendmsg+0x723/0xbe0
[  821.032221][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  821.032221][   T72]      ___sys_sendmsg+0xee/0x170
[  821.032221][   T72]      __sys_sendmsg+0xcd/0x170
[  821.032221][   T72]      do_syscall_64+0xc6/0x1e0
[  821.032221][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.032221][   T72] 
[  821.034061][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  821.034344][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  821.034344][   T72]      dst_init+0x84/0x4a0
[  821.034344][   T72]      dst_alloc+0x97/0x150
[  821.034344][   T72]      ip6_dst_alloc+0x23/0x90
[  821.034344][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  821.034344][   T72]      ip6_pol_route+0x56f/0x840
[  821.034344][   T72]      fib6_rule_lookup+0x227/0x600
[  821.034344][   T72]      ip6_route_output_flags+0x251/0x460
[  821.034344][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  821.034344][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  821.034344][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  821.034344][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  821.034344][   T72]      ip6_datagram_connect+0x2c/0x50
[  821.034344][   T72]      __sys_connect+0x217/0x2a0
[  821.034344][   T72]      __x64_sys_connect+0x72/0xb0
[  821.034344][   T72]      do_syscall_64+0xc6/0x1e0
[  821.034344][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  821.034344][   T72] 
[  831.276737][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  831.277185][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  831.277185][   T72]      netdev_get_by_index+0x5e/0x80
[  831.277185][   T72]      fib6_nh_init+0x3d8/0x15b0
[  831.277185][   T72]      ip6_route_info_create+0xf18/0x17d0
[  831.277185][   T72]      addrconf_f6i_alloc+0x244/0x410
[  831.277185][   T72]      ipv6_add_addr+0x411/0x2000
[  831.277185][   T72]      inet6_addr_add+0x30e/0xa40
[  831.277185][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  831.277185][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.277185][   T72]      netlink_rcv_skb+0x130/0x360
[  831.277185][   T72]      netlink_unicast+0x449/0x710
[  831.277185][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.277185][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.277185][   T72]      ___sys_sendmsg+0xee/0x170
[  831.277185][   T72]      __sys_sendmsg+0xcd/0x170
[  831.277185][   T72]      do_syscall_64+0xc6/0x1e0
[  831.277185][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.277185][   T72] 
[  831.279154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  831.279154][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  831.279154][   T72]      ipv6_find_idev+0x102/0x170
[  831.279154][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  831.279154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.279154][   T72]      netlink_rcv_skb+0x130/0x360
[  831.279154][   T72]      netlink_unicast+0x449/0x710
[  831.279154][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.279154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.279154][   T72]      ___sys_sendmsg+0xee/0x170
[  831.279154][   T72]      __sys_sendmsg+0xcd/0x170
[  831.279154][   T72]      do_syscall_64+0xc6/0x1e0
[  831.279154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.279154][   T72] 
[  831.280690][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  831.280690][   T72]      neigh_parms_alloc+0x1e5/0x510
[  831.280690][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  831.280690][   T72]      ipv6_find_idev+0x102/0x170
[  831.280690][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  831.280690][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.280690][   T72]      netlink_rcv_skb+0x130/0x360
[  831.280690][   T72]      netlink_unicast+0x449/0x710
[  831.280690][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.280690][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.280690][   T72]      ___sys_sendmsg+0xee/0x170
[  831.280690][   T72]      __sys_sendmsg+0xcd/0x170
[  831.280690][   T72]      do_syscall_64+0xc6/0x1e0
[  831.280690][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.280690][   T72] 
[  831.282369][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  831.282670][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  831.282670][   T72]      netdev_get_by_index+0x5e/0x80
[  831.282670][   T72]      fib6_nh_init+0x3d8/0x15b0
[  831.282670][   T72]      ip6_route_info_create+0xf18/0x17d0
[  831.282670][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  831.282670][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  831.282670][   T72]      addrconf_join_anycast+0x1c0/0x220
[  831.282670][   T72]      dev_forward_change+0x2a6/0x7b0
[  831.282670][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  831.282670][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  831.282670][   T72]      proc_sys_call_handler+0x403/0x5e0
[  831.282670][   T72]      vfs_write+0x9e5/0x10a0
[  831.282670][   T72]      ksys_write+0xf5/0x1e0
[  831.282670][   T72]      do_syscall_64+0xc6/0x1e0
[  831.282670][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.282670][   T72] 
[  831.284491][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  831.284491][   T72]      netdev_get_by_index+0x5e/0x80
[  831.284491][   T72]      fib6_nh_init+0x3d8/0x15b0
[  831.284491][   T72]      ip6_route_info_create+0xf18/0x17d0
[  831.284491][   T72]      addrconf_f6i_alloc+0x244/0x410
[  831.284491][   T72]      ipv6_add_addr+0x411/0x2000
[  831.284491][   T72]      inet6_addr_add+0x30e/0xa40
[  831.284491][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  831.284491][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.284491][   T72]      netlink_rcv_skb+0x130/0x360
[  831.284491][   T72]      netlink_unicast+0x449/0x710
[  831.284491][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.284491][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.284491][   T72]      ___sys_sendmsg+0xee/0x170
[  831.284491][   T72]      __sys_sendmsg+0xcd/0x170
[  831.284491][   T72]      do_syscall_64+0xc6/0x1e0
[  831.284491][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.284491][   T72] 
[  831.286477][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  831.286477][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  831.286477][   T72]      ipv6_find_idev+0x102/0x170
[  831.286477][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  831.286477][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.286477][   T72]      netlink_rcv_skb+0x130/0x360
[  831.286477][   T72]      netlink_unicast+0x449/0x710
[  831.286477][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.286477][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.286477][   T72]      ___sys_sendmsg+0xee/0x170
[  831.286477][   T72]      __sys_sendmsg+0xcd/0x170
[  831.286477][   T72]      do_syscall_64+0xc6/0x1e0
[  831.286477][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.286477][   T72] 
[  831.287993][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  831.287993][   T72]      neigh_parms_alloc+0x1e5/0x510
[  831.287993][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  831.287993][   T72]      ipv6_find_idev+0x102/0x170
[  831.287993][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  831.287993][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  831.287993][   T72]      netlink_rcv_skb+0x130/0x360
[  831.287993][   T72]      netlink_unicast+0x449/0x710
[  831.287993][   T72]      netlink_sendmsg+0x723/0xbe0
[  831.287993][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  831.287993][   T72]      ___sys_sendmsg+0xee/0x170
[  831.287993][   T72]      __sys_sendmsg+0xcd/0x170
[  831.287993][   T72]      do_syscall_64+0xc6/0x1e0
[  831.287993][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.287993][   T72] 
[  831.289648][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  831.289888][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  831.289888][   T72]      dst_init+0x84/0x4a0
[  831.289888][   T72]      dst_alloc+0x97/0x150
[  831.289888][   T72]      ip6_dst_alloc+0x23/0x90
[  831.289888][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  831.289888][   T72]      ip6_pol_route+0x56f/0x840
[  831.289888][   T72]      fib6_rule_lookup+0x227/0x600
[  831.289888][   T72]      ip6_route_output_flags+0x251/0x460
[  831.289888][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  831.289888][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  831.289888][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  831.289888][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  831.289888][   T72]      ip6_datagram_connect+0x2c/0x50
[  831.289888][   T72]      __sys_connect+0x217/0x2a0
[  831.289888][   T72]      __x64_sys_connect+0x72/0xb0
[  831.289888][   T72]      do_syscall_64+0xc6/0x1e0
[  831.289888][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  831.289888][   T72] 
[  841.372713][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  841.373171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  841.373171][   T72]      netdev_get_by_index+0x5e/0x80
[  841.373171][   T72]      fib6_nh_init+0x3d8/0x15b0
[  841.373171][   T72]      ip6_route_info_create+0xf18/0x17d0
[  841.373171][   T72]      addrconf_f6i_alloc+0x244/0x410
[  841.373171][   T72]      ipv6_add_addr+0x411/0x2000
[  841.373171][   T72]      inet6_addr_add+0x30e/0xa40
[  841.373171][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  841.373171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.373171][   T72]      netlink_rcv_skb+0x130/0x360
[  841.373171][   T72]      netlink_unicast+0x449/0x710
[  841.373171][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.373171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.373171][   T72]      ___sys_sendmsg+0xee/0x170
[  841.373171][   T72]      __sys_sendmsg+0xcd/0x170
[  841.373171][   T72]      do_syscall_64+0xc6/0x1e0
[  841.373171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.373171][   T72] 
[  841.375149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  841.375149][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  841.375149][   T72]      ipv6_find_idev+0x102/0x170
[  841.375149][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  841.375149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.375149][   T72]      netlink_rcv_skb+0x130/0x360
[  841.375149][   T72]      netlink_unicast+0x449/0x710
[  841.375149][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.375149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.375149][   T72]      ___sys_sendmsg+0xee/0x170
[  841.375149][   T72]      __sys_sendmsg+0xcd/0x170
[  841.375149][   T72]      do_syscall_64+0xc6/0x1e0
[  841.375149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.375149][   T72] 
[  841.376670][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  841.376670][   T72]      neigh_parms_alloc+0x1e5/0x510
[  841.376670][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  841.376670][   T72]      ipv6_find_idev+0x102/0x170
[  841.376670][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  841.376670][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.376670][   T72]      netlink_rcv_skb+0x130/0x360
[  841.376670][   T72]      netlink_unicast+0x449/0x710
[  841.376670][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.376670][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.376670][   T72]      ___sys_sendmsg+0xee/0x170
[  841.376670][   T72]      __sys_sendmsg+0xcd/0x170
[  841.376670][   T72]      do_syscall_64+0xc6/0x1e0
[  841.376670][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.376670][   T72] 
[  841.378335][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  841.378619][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  841.378619][   T72]      netdev_get_by_index+0x5e/0x80
[  841.378619][   T72]      fib6_nh_init+0x3d8/0x15b0
[  841.378619][   T72]      ip6_route_info_create+0xf18/0x17d0
[  841.378619][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  841.378619][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  841.378619][   T72]      addrconf_join_anycast+0x1c0/0x220
[  841.378619][   T72]      dev_forward_change+0x2a6/0x7b0
[  841.378619][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  841.378619][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  841.378619][   T72]      proc_sys_call_handler+0x403/0x5e0
[  841.378619][   T72]      vfs_write+0x9e5/0x10a0
[  841.378619][   T72]      ksys_write+0xf5/0x1e0
[  841.378619][   T72]      do_syscall_64+0xc6/0x1e0
[  841.378619][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.378619][   T72] 
[  841.380447][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  841.380447][   T72]      netdev_get_by_index+0x5e/0x80
[  841.380447][   T72]      fib6_nh_init+0x3d8/0x15b0
[  841.380447][   T72]      ip6_route_info_create+0xf18/0x17d0
[  841.380447][   T72]      addrconf_f6i_alloc+0x244/0x410
[  841.380447][   T72]      ipv6_add_addr+0x411/0x2000
[  841.380447][   T72]      inet6_addr_add+0x30e/0xa40
[  841.380447][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  841.380447][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.380447][   T72]      netlink_rcv_skb+0x130/0x360
[  841.380447][   T72]      netlink_unicast+0x449/0x710
[  841.380447][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.380447][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.380447][   T72]      ___sys_sendmsg+0xee/0x170
[  841.380447][   T72]      __sys_sendmsg+0xcd/0x170
[  841.380447][   T72]      do_syscall_64+0xc6/0x1e0
[  841.380447][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.380447][   T72] 
[  841.382403][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  841.382403][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  841.382403][   T72]      ipv6_find_idev+0x102/0x170
[  841.382403][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  841.382403][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.382403][   T72]      netlink_rcv_skb+0x130/0x360
[  841.382403][   T72]      netlink_unicast+0x449/0x710
[  841.382403][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.382403][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.382403][   T72]      ___sys_sendmsg+0xee/0x170
[  841.382403][   T72]      __sys_sendmsg+0xcd/0x170
[  841.382403][   T72]      do_syscall_64+0xc6/0x1e0
[  841.382403][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.382403][   T72] 
[  841.383917][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  841.383917][   T72]      neigh_parms_alloc+0x1e5/0x510
[  841.383917][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  841.383917][   T72]      ipv6_find_idev+0x102/0x170
[  841.383917][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  841.383917][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  841.383917][   T72]      netlink_rcv_skb+0x130/0x360
[  841.383917][   T72]      netlink_unicast+0x449/0x710
[  841.383917][   T72]      netlink_sendmsg+0x723/0xbe0
[  841.383917][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  841.383917][   T72]      ___sys_sendmsg+0xee/0x170
[  841.383917][   T72]      __sys_sendmsg+0xcd/0x170
[  841.383917][   T72]      do_syscall_64+0xc6/0x1e0
[  841.383917][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.383917][   T72] 
[  841.385569][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  841.385818][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  841.385818][   T72]      dst_init+0x84/0x4a0
[  841.385818][   T72]      dst_alloc+0x97/0x150
[  841.385818][   T72]      ip6_dst_alloc+0x23/0x90
[  841.385818][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  841.385818][   T72]      ip6_pol_route+0x56f/0x840
[  841.385818][   T72]      fib6_rule_lookup+0x227/0x600
[  841.385818][   T72]      ip6_route_output_flags+0x251/0x460
[  841.385818][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  841.385818][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  841.385818][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  841.385818][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  841.385818][   T72]      ip6_datagram_connect+0x2c/0x50
[  841.385818][   T72]      __sys_connect+0x217/0x2a0
[  841.385818][   T72]      __x64_sys_connect+0x72/0xb0
[  841.385818][   T72]      do_syscall_64+0xc6/0x1e0
[  841.385818][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  841.385818][   T72] 
[  851.628702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  851.629157][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  851.629157][   T72]      netdev_get_by_index+0x5e/0x80
[  851.629157][   T72]      fib6_nh_init+0x3d8/0x15b0
[  851.629157][   T72]      ip6_route_info_create+0xf18/0x17d0
[  851.629157][   T72]      addrconf_f6i_alloc+0x244/0x410
[  851.629157][   T72]      ipv6_add_addr+0x411/0x2000
[  851.629157][   T72]      inet6_addr_add+0x30e/0xa40
[  851.629157][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  851.629157][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.629157][   T72]      netlink_rcv_skb+0x130/0x360
[  851.629157][   T72]      netlink_unicast+0x449/0x710
[  851.629157][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.629157][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.629157][   T72]      ___sys_sendmsg+0xee/0x170
[  851.629157][   T72]      __sys_sendmsg+0xcd/0x170
[  851.629157][   T72]      do_syscall_64+0xc6/0x1e0
[  851.629157][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.629157][   T72] 
[  851.631597][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  851.631597][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  851.631597][   T72]      ipv6_find_idev+0x102/0x170
[  851.631597][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  851.631597][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.631597][   T72]      netlink_rcv_skb+0x130/0x360
[  851.631597][   T72]      netlink_unicast+0x449/0x710
[  851.631597][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.631597][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.631597][   T72]      ___sys_sendmsg+0xee/0x170
[  851.631597][   T72]      __sys_sendmsg+0xcd/0x170
[  851.631597][   T72]      do_syscall_64+0xc6/0x1e0
[  851.631597][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.631597][   T72] 
[  851.633462][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  851.633462][   T72]      neigh_parms_alloc+0x1e5/0x510
[  851.633462][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  851.633462][   T72]      ipv6_find_idev+0x102/0x170
[  851.633462][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  851.633462][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.633462][   T72]      netlink_rcv_skb+0x130/0x360
[  851.633462][   T72]      netlink_unicast+0x449/0x710
[  851.633462][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.633462][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.633462][   T72]      ___sys_sendmsg+0xee/0x170
[  851.633462][   T72]      __sys_sendmsg+0xcd/0x170
[  851.633462][   T72]      do_syscall_64+0xc6/0x1e0
[  851.633462][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.633462][   T72] 
[  851.635495][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  851.635828][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  851.635828][   T72]      netdev_get_by_index+0x5e/0x80
[  851.635828][   T72]      fib6_nh_init+0x3d8/0x15b0
[  851.635828][   T72]      ip6_route_info_create+0xf18/0x17d0
[  851.635828][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  851.635828][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  851.635828][   T72]      addrconf_join_anycast+0x1c0/0x220
[  851.635828][   T72]      dev_forward_change+0x2a6/0x7b0
[  851.635828][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  851.635828][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  851.635828][   T72]      proc_sys_call_handler+0x403/0x5e0
[  851.635828][   T72]      vfs_write+0x9e5/0x10a0
[  851.635828][   T72]      ksys_write+0xf5/0x1e0
[  851.635828][   T72]      do_syscall_64+0xc6/0x1e0
[  851.635828][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.635828][   T72] 
[  851.638082][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  851.638082][   T72]      netdev_get_by_index+0x5e/0x80
[  851.638082][   T72]      fib6_nh_init+0x3d8/0x15b0
[  851.638082][   T72]      ip6_route_info_create+0xf18/0x17d0
[  851.638082][   T72]      addrconf_f6i_alloc+0x244/0x410
[  851.638082][   T72]      ipv6_add_addr+0x411/0x2000
[  851.638082][   T72]      inet6_addr_add+0x30e/0xa40
[  851.638082][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  851.638082][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.638082][   T72]      netlink_rcv_skb+0x130/0x360
[  851.638082][   T72]      netlink_unicast+0x449/0x710
[  851.638082][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.638082][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.638082][   T72]      ___sys_sendmsg+0xee/0x170
[  851.638082][   T72]      __sys_sendmsg+0xcd/0x170
[  851.638082][   T72]      do_syscall_64+0xc6/0x1e0
[  851.638082][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.638082][   T72] 
[  851.640502][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  851.640502][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  851.640502][   T72]      ipv6_find_idev+0x102/0x170
[  851.640502][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  851.640502][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.640502][   T72]      netlink_rcv_skb+0x130/0x360
[  851.640502][   T72]      netlink_unicast+0x449/0x710
[  851.640502][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.640502][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.640502][   T72]      ___sys_sendmsg+0xee/0x170
[  851.640502][   T72]      __sys_sendmsg+0xcd/0x170
[  851.640502][   T72]      do_syscall_64+0xc6/0x1e0
[  851.640502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.640502][   T72] 
[  851.642360][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  851.642360][   T72]      neigh_parms_alloc+0x1e5/0x510
[  851.642360][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  851.642360][   T72]      ipv6_find_idev+0x102/0x170
[  851.642360][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  851.642360][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  851.642360][   T72]      netlink_rcv_skb+0x130/0x360
[  851.642360][   T72]      netlink_unicast+0x449/0x710
[  851.642360][   T72]      netlink_sendmsg+0x723/0xbe0
[  851.642360][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  851.642360][   T72]      ___sys_sendmsg+0xee/0x170
[  851.642360][   T72]      __sys_sendmsg+0xcd/0x170
[  851.642360][   T72]      do_syscall_64+0xc6/0x1e0
[  851.642360][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.642360][   T72] 
[  851.644396][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  851.644694][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  851.644694][   T72]      dst_init+0x84/0x4a0
[  851.644694][   T72]      dst_alloc+0x97/0x150
[  851.644694][   T72]      ip6_dst_alloc+0x23/0x90
[  851.644694][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  851.644694][   T72]      ip6_pol_route+0x56f/0x840
[  851.644694][   T72]      fib6_rule_lookup+0x227/0x600
[  851.644694][   T72]      ip6_route_output_flags+0x251/0x460
[  851.644694][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  851.644694][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  851.644694][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  851.644694][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  851.644694][   T72]      ip6_datagram_connect+0x2c/0x50
[  851.644694][   T72]      __sys_connect+0x217/0x2a0
[  851.644694][   T72]      __x64_sys_connect+0x72/0xb0
[  851.644694][   T72]      do_syscall_64+0xc6/0x1e0
[  851.644694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  851.644694][   T72] 
[  861.476661][   T42] INFO: task modprobe:1562 blocked for more than 368 seconds.
[  861.477003][   T42]       Not tainted 6.8.0-virtme #1
[  861.477123][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  861.477323][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[  861.477567][   T42] Call Trace:
[  861.477688][   T42]  <TASK>
[  861.477763][   T42]  __schedule+0x705/0x1ac0
[  861.477900][   T42]  ? __pfx___schedule+0x10/0x10
[  861.478024][   T42]  ? schedule+0x1a5/0x210
[  861.478120][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  861.478248][   T42]  ? mark_lock+0x38/0x3e0
[  861.478344][   T42]  ? do_raw_spin_lock+0x131/0x270
[  861.478470][   T42]  ? schedule+0x1a5/0x210
[  861.478574][   T42]  schedule+0xdf/0x210
[  861.478681][   T42]  schedule_preempt_disabled+0x15/0x30
[  861.478802][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[  861.478936][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[  861.479091][   T42]  ? kasan_save_stack+0x34/0x50
[  861.479212][   T42]  ? kasan_save_stack+0x24/0x50
[  861.479338][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  861.479469][   T42]  ? lock_acquire+0x1c1/0x220
[  861.479603][   T42]  ? register_pernet_subsys+0x1a/0x50
[  861.479734][   T42]  down_write+0x1c9/0x200
[  861.479828][   T42]  ? __pfx_down_write+0x10/0x10
[  861.479954][   T42]  ? __pfx___lock_release+0x10/0x10
[  861.480083][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[  861.480285][   T42]  register_pernet_subsys+0x1a/0x50
[  861.480410][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[  861.480596][   T42]  do_one_initcall+0xc8/0x3f0
[  861.480721][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[  861.480848][   T42]  ? __create_object+0x5e/0xb0
[  861.480979][   T42]  ? kasan_unpoison+0x27/0x60
[  861.481110][   T42]  do_init_module+0x233/0x740
[  861.481242][   T42]  load_module+0x16b5/0x2350
[  861.481377][   T42]  ? __pfx_load_module+0x10/0x10
[  861.481506][   T42]  ? kernel_read_file+0x3d2/0x520
[  861.481653][   T42]  ? kernel_read_file+0x300/0x520
[  861.481780][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[  861.481922][   T42]  ? init_module_from_file+0xd2/0x130
[  861.482043][   T42]  init_module_from_file+0xd2/0x130
[  861.482166][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[  861.482317][   T42]  ? __lock_release+0x103/0x460
[  861.482439][   T42]  ? idempotent_init_module+0x32a/0x620
[  861.482575][   T42]  ? idempotent_init_module+0x32a/0x620
[  861.482709][   T42]  ? do_raw_spin_unlock+0x58/0x220
[  861.482835][   T42]  idempotent_init_module+0x342/0x620
[  861.482967][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[  861.483145][   T42]  __x64_sys_finit_module+0xbe/0x130
[  861.483268][   T42]  do_syscall_64+0xc6/0x1e0
[  861.483394][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.483553][   T42] RIP: 0033:0x7ff3fdc10e5d
[  861.483687][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  861.483874][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[  861.484059][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[  861.484238][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[  861.484423][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[  861.484616][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[  861.484809][   T42]  </TASK>
[  861.484908][   T42] 
[  861.484908][   T42] Showing all locks held in the system:
[  861.485085][   T42] 1 lock held by khungtaskd/42:
[  861.485204][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[  861.485429][   T42] 3 locks held by kworker/u16:1/72:
[  861.485545][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  861.485811][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  861.486054][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[  861.486274][   T42] 2 locks held by kworker/u20:3/1240:
[  861.486393][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  861.486648][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  861.486925][   T42] 1 lock held by modprobe/1562:
[  861.487041][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[  861.487289][   T42] 
[  861.487349][   T42] =============================================
[  861.487349][   T42] 
[  861.884710][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  861.885154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  861.885154][   T72]      netdev_get_by_index+0x5e/0x80
[  861.885154][   T72]      fib6_nh_init+0x3d8/0x15b0
[  861.885154][   T72]      ip6_route_info_create+0xf18/0x17d0
[  861.885154][   T72]      addrconf_f6i_alloc+0x244/0x410
[  861.885154][   T72]      ipv6_add_addr+0x411/0x2000
[  861.885154][   T72]      inet6_addr_add+0x30e/0xa40
[  861.885154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  861.885154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.885154][   T72]      netlink_rcv_skb+0x130/0x360
[  861.885154][   T72]      netlink_unicast+0x449/0x710
[  861.885154][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.885154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.885154][   T72]      ___sys_sendmsg+0xee/0x170
[  861.885154][   T72]      __sys_sendmsg+0xcd/0x170
[  861.885154][   T72]      do_syscall_64+0xc6/0x1e0
[  861.885154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.885154][   T72] 
[  861.887173][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  861.887173][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  861.887173][   T72]      ipv6_find_idev+0x102/0x170
[  861.887173][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  861.887173][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.887173][   T72]      netlink_rcv_skb+0x130/0x360
[  861.887173][   T72]      netlink_unicast+0x449/0x710
[  861.887173][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.887173][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.887173][   T72]      ___sys_sendmsg+0xee/0x170
[  861.887173][   T72]      __sys_sendmsg+0xcd/0x170
[  861.887173][   T72]      do_syscall_64+0xc6/0x1e0
[  861.887173][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.887173][   T72] 
[  861.888715][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  861.888715][   T72]      neigh_parms_alloc+0x1e5/0x510
[  861.888715][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  861.888715][   T72]      ipv6_find_idev+0x102/0x170
[  861.888715][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  861.888715][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.888715][   T72]      netlink_rcv_skb+0x130/0x360
[  861.888715][   T72]      netlink_unicast+0x449/0x710
[  861.888715][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.888715][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.888715][   T72]      ___sys_sendmsg+0xee/0x170
[  861.888715][   T72]      __sys_sendmsg+0xcd/0x170
[  861.888715][   T72]      do_syscall_64+0xc6/0x1e0
[  861.888715][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.888715][   T72] 
[  861.890400][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  861.890685][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  861.890685][   T72]      netdev_get_by_index+0x5e/0x80
[  861.890685][   T72]      fib6_nh_init+0x3d8/0x15b0
[  861.890685][   T72]      ip6_route_info_create+0xf18/0x17d0
[  861.890685][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  861.890685][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  861.890685][   T72]      addrconf_join_anycast+0x1c0/0x220
[  861.890685][   T72]      dev_forward_change+0x2a6/0x7b0
[  861.890685][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  861.890685][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  861.890685][   T72]      proc_sys_call_handler+0x403/0x5e0
[  861.890685][   T72]      vfs_write+0x9e5/0x10a0
[  861.890685][   T72]      ksys_write+0xf5/0x1e0
[  861.890685][   T72]      do_syscall_64+0xc6/0x1e0
[  861.890685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.890685][   T72] 
[  861.892543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  861.892543][   T72]      netdev_get_by_index+0x5e/0x80
[  861.892543][   T72]      fib6_nh_init+0x3d8/0x15b0
[  861.892543][   T72]      ip6_route_info_create+0xf18/0x17d0
[  861.892543][   T72]      addrconf_f6i_alloc+0x244/0x410
[  861.892543][   T72]      ipv6_add_addr+0x411/0x2000
[  861.892543][   T72]      inet6_addr_add+0x30e/0xa40
[  861.892543][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  861.892543][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.892543][   T72]      netlink_rcv_skb+0x130/0x360
[  861.892543][   T72]      netlink_unicast+0x449/0x710
[  861.892543][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.892543][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.892543][   T72]      ___sys_sendmsg+0xee/0x170
[  861.892543][   T72]      __sys_sendmsg+0xcd/0x170
[  861.892543][   T72]      do_syscall_64+0xc6/0x1e0
[  861.892543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.892543][   T72] 
[  861.894522][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  861.894522][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  861.894522][   T72]      ipv6_find_idev+0x102/0x170
[  861.894522][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  861.894522][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.894522][   T72]      netlink_rcv_skb+0x130/0x360
[  861.894522][   T72]      netlink_unicast+0x449/0x710
[  861.894522][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.894522][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.894522][   T72]      ___sys_sendmsg+0xee/0x170
[  861.894522][   T72]      __sys_sendmsg+0xcd/0x170
[  861.894522][   T72]      do_syscall_64+0xc6/0x1e0
[  861.894522][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.894522][   T72] 
[  861.896063][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  861.896063][   T72]      neigh_parms_alloc+0x1e5/0x510
[  861.896063][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  861.896063][   T72]      ipv6_find_idev+0x102/0x170
[  861.896063][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  861.896063][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  861.896063][   T72]      netlink_rcv_skb+0x130/0x360
[  861.896063][   T72]      netlink_unicast+0x449/0x710
[  861.896063][   T72]      netlink_sendmsg+0x723/0xbe0
[  861.896063][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  861.896063][   T72]      ___sys_sendmsg+0xee/0x170
[  861.896063][   T72]      __sys_sendmsg+0xcd/0x170
[  861.896063][   T72]      do_syscall_64+0xc6/0x1e0
[  861.896063][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.896063][   T72] 
[  861.897746][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  861.897994][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  861.897994][   T72]      dst_init+0x84/0x4a0
[  861.897994][   T72]      dst_alloc+0x97/0x150
[  861.897994][   T72]      ip6_dst_alloc+0x23/0x90
[  861.897994][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  861.897994][   T72]      ip6_pol_route+0x56f/0x840
[  861.897994][   T72]      fib6_rule_lookup+0x227/0x600
[  861.897994][   T72]      ip6_route_output_flags+0x251/0x460
[  861.897994][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  861.897994][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  861.897994][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  861.897994][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  861.897994][   T72]      ip6_datagram_connect+0x2c/0x50
[  861.897994][   T72]      __sys_connect+0x217/0x2a0
[  861.897994][   T72]      __x64_sys_connect+0x72/0xb0
[  861.897994][   T72]      do_syscall_64+0xc6/0x1e0
[  861.897994][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  861.897994][   T72] 
[  872.140658][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  872.141126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  872.141126][   T72]      netdev_get_by_index+0x5e/0x80
[  872.141126][   T72]      fib6_nh_init+0x3d8/0x15b0
[  872.141126][   T72]      ip6_route_info_create+0xf18/0x17d0
[  872.141126][   T72]      addrconf_f6i_alloc+0x244/0x410
[  872.141126][   T72]      ipv6_add_addr+0x411/0x2000
[  872.141126][   T72]      inet6_addr_add+0x30e/0xa40
[  872.141126][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  872.141126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.141126][   T72]      netlink_rcv_skb+0x130/0x360
[  872.141126][   T72]      netlink_unicast+0x449/0x710
[  872.141126][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.141126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.141126][   T72]      ___sys_sendmsg+0xee/0x170
[  872.141126][   T72]      __sys_sendmsg+0xcd/0x170
[  872.141126][   T72]      do_syscall_64+0xc6/0x1e0
[  872.141126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.141126][   T72] 
[  872.143104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  872.143104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  872.143104][   T72]      ipv6_find_idev+0x102/0x170
[  872.143104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  872.143104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.143104][   T72]      netlink_rcv_skb+0x130/0x360
[  872.143104][   T72]      netlink_unicast+0x449/0x710
[  872.143104][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.143104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.143104][   T72]      ___sys_sendmsg+0xee/0x170
[  872.143104][   T72]      __sys_sendmsg+0xcd/0x170
[  872.143104][   T72]      do_syscall_64+0xc6/0x1e0
[  872.143104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.143104][   T72] 
[  872.144622][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  872.144622][   T72]      neigh_parms_alloc+0x1e5/0x510
[  872.144622][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  872.144622][   T72]      ipv6_find_idev+0x102/0x170
[  872.144622][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  872.144622][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.144622][   T72]      netlink_rcv_skb+0x130/0x360
[  872.144622][   T72]      netlink_unicast+0x449/0x710
[  872.144622][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.144622][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.144622][   T72]      ___sys_sendmsg+0xee/0x170
[  872.144622][   T72]      __sys_sendmsg+0xcd/0x170
[  872.144622][   T72]      do_syscall_64+0xc6/0x1e0
[  872.144622][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.144622][   T72] 
[  872.146294][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  872.146566][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  872.146566][   T72]      netdev_get_by_index+0x5e/0x80
[  872.146566][   T72]      fib6_nh_init+0x3d8/0x15b0
[  872.146566][   T72]      ip6_route_info_create+0xf18/0x17d0
[  872.146566][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  872.146566][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  872.146566][   T72]      addrconf_join_anycast+0x1c0/0x220
[  872.146566][   T72]      dev_forward_change+0x2a6/0x7b0
[  872.146566][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  872.146566][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  872.146566][   T72]      proc_sys_call_handler+0x403/0x5e0
[  872.146566][   T72]      vfs_write+0x9e5/0x10a0
[  872.146566][   T72]      ksys_write+0xf5/0x1e0
[  872.146566][   T72]      do_syscall_64+0xc6/0x1e0
[  872.146566][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.146566][   T72] 
[  872.148398][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  872.148398][   T72]      netdev_get_by_index+0x5e/0x80
[  872.148398][   T72]      fib6_nh_init+0x3d8/0x15b0
[  872.148398][   T72]      ip6_route_info_create+0xf18/0x17d0
[  872.148398][   T72]      addrconf_f6i_alloc+0x244/0x410
[  872.148398][   T72]      ipv6_add_addr+0x411/0x2000
[  872.148398][   T72]      inet6_addr_add+0x30e/0xa40
[  872.148398][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  872.148398][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.148398][   T72]      netlink_rcv_skb+0x130/0x360
[  872.148398][   T72]      netlink_unicast+0x449/0x710
[  872.148398][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.148398][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.148398][   T72]      ___sys_sendmsg+0xee/0x170
[  872.148398][   T72]      __sys_sendmsg+0xcd/0x170
[  872.148398][   T72]      do_syscall_64+0xc6/0x1e0
[  872.148398][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.148398][   T72] 
[  872.150366][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  872.150366][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  872.150366][   T72]      ipv6_find_idev+0x102/0x170
[  872.150366][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  872.150366][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.150366][   T72]      netlink_rcv_skb+0x130/0x360
[  872.150366][   T72]      netlink_unicast+0x449/0x710
[  872.150366][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.150366][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.150366][   T72]      ___sys_sendmsg+0xee/0x170
[  872.150366][   T72]      __sys_sendmsg+0xcd/0x170
[  872.150366][   T72]      do_syscall_64+0xc6/0x1e0
[  872.150366][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.150366][   T72] 
[  872.151884][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  872.151884][   T72]      neigh_parms_alloc+0x1e5/0x510
[  872.151884][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  872.151884][   T72]      ipv6_find_idev+0x102/0x170
[  872.151884][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  872.151884][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  872.151884][   T72]      netlink_rcv_skb+0x130/0x360
[  872.151884][   T72]      netlink_unicast+0x449/0x710
[  872.151884][   T72]      netlink_sendmsg+0x723/0xbe0
[  872.151884][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  872.151884][   T72]      ___sys_sendmsg+0xee/0x170
[  872.151884][   T72]      __sys_sendmsg+0xcd/0x170
[  872.151884][   T72]      do_syscall_64+0xc6/0x1e0
[  872.151884][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.151884][   T72] 
[  872.153547][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  872.153802][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  872.153802][   T72]      dst_init+0x84/0x4a0
[  872.153802][   T72]      dst_alloc+0x97/0x150
[  872.153802][   T72]      ip6_dst_alloc+0x23/0x90
[  872.153802][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  872.153802][   T72]      ip6_pol_route+0x56f/0x840
[  872.153802][   T72]      fib6_rule_lookup+0x227/0x600
[  872.153802][   T72]      ip6_route_output_flags+0x251/0x460
[  872.153802][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  872.153802][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  872.153802][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  872.153802][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  872.153802][   T72]      ip6_datagram_connect+0x2c/0x50
[  872.153802][   T72]      __sys_connect+0x217/0x2a0
[  872.153802][   T72]      __x64_sys_connect+0x72/0xb0
[  872.153802][   T72]      do_syscall_64+0xc6/0x1e0
[  872.153802][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  872.153802][   T72] 
[  882.396639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  882.397029][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  882.397029][   T72]      netdev_get_by_index+0x5e/0x80
[  882.397029][   T72]      fib6_nh_init+0x3d8/0x15b0
[  882.397029][   T72]      ip6_route_info_create+0xf18/0x17d0
[  882.397029][   T72]      addrconf_f6i_alloc+0x244/0x410
[  882.397029][   T72]      ipv6_add_addr+0x411/0x2000
[  882.397029][   T72]      inet6_addr_add+0x30e/0xa40
[  882.397029][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  882.397029][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.397029][   T72]      netlink_rcv_skb+0x130/0x360
[  882.397029][   T72]      netlink_unicast+0x449/0x710
[  882.397029][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.397029][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.397029][   T72]      ___sys_sendmsg+0xee/0x170
[  882.397029][   T72]      __sys_sendmsg+0xcd/0x170
[  882.397029][   T72]      do_syscall_64+0xc6/0x1e0
[  882.397029][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.397029][   T72] 
[  882.399044][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  882.399044][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  882.399044][   T72]      ipv6_find_idev+0x102/0x170
[  882.399044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  882.399044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.399044][   T72]      netlink_rcv_skb+0x130/0x360
[  882.399044][   T72]      netlink_unicast+0x449/0x710
[  882.399044][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.399044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.399044][   T72]      ___sys_sendmsg+0xee/0x170
[  882.399044][   T72]      __sys_sendmsg+0xcd/0x170
[  882.399044][   T72]      do_syscall_64+0xc6/0x1e0
[  882.399044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.399044][   T72] 
[  882.400571][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  882.400571][   T72]      neigh_parms_alloc+0x1e5/0x510
[  882.400571][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  882.400571][   T72]      ipv6_find_idev+0x102/0x170
[  882.400571][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  882.400571][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.400571][   T72]      netlink_rcv_skb+0x130/0x360
[  882.400571][   T72]      netlink_unicast+0x449/0x710
[  882.400571][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.400571][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.400571][   T72]      ___sys_sendmsg+0xee/0x170
[  882.400571][   T72]      __sys_sendmsg+0xcd/0x170
[  882.400571][   T72]      do_syscall_64+0xc6/0x1e0
[  882.400571][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.400571][   T72] 
[  882.402246][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  882.402516][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  882.402516][   T72]      netdev_get_by_index+0x5e/0x80
[  882.402516][   T72]      fib6_nh_init+0x3d8/0x15b0
[  882.402516][   T72]      ip6_route_info_create+0xf18/0x17d0
[  882.402516][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  882.402516][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  882.402516][   T72]      addrconf_join_anycast+0x1c0/0x220
[  882.402516][   T72]      dev_forward_change+0x2a6/0x7b0
[  882.402516][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  882.402516][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  882.402516][   T72]      proc_sys_call_handler+0x403/0x5e0
[  882.402516][   T72]      vfs_write+0x9e5/0x10a0
[  882.402516][   T72]      ksys_write+0xf5/0x1e0
[  882.402516][   T72]      do_syscall_64+0xc6/0x1e0
[  882.402516][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.402516][   T72] 
[  882.404352][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  882.404352][   T72]      netdev_get_by_index+0x5e/0x80
[  882.404352][   T72]      fib6_nh_init+0x3d8/0x15b0
[  882.404352][   T72]      ip6_route_info_create+0xf18/0x17d0
[  882.404352][   T72]      addrconf_f6i_alloc+0x244/0x410
[  882.404352][   T72]      ipv6_add_addr+0x411/0x2000
[  882.404352][   T72]      inet6_addr_add+0x30e/0xa40
[  882.404352][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  882.404352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.404352][   T72]      netlink_rcv_skb+0x130/0x360
[  882.404352][   T72]      netlink_unicast+0x449/0x710
[  882.404352][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.404352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.404352][   T72]      ___sys_sendmsg+0xee/0x170
[  882.404352][   T72]      __sys_sendmsg+0xcd/0x170
[  882.404352][   T72]      do_syscall_64+0xc6/0x1e0
[  882.404352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.404352][   T72] 
[  882.406337][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  882.406337][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  882.406337][   T72]      ipv6_find_idev+0x102/0x170
[  882.406337][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  882.406337][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.406337][   T72]      netlink_rcv_skb+0x130/0x360
[  882.406337][   T72]      netlink_unicast+0x449/0x710
[  882.406337][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.406337][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.406337][   T72]      ___sys_sendmsg+0xee/0x170
[  882.406337][   T72]      __sys_sendmsg+0xcd/0x170
[  882.406337][   T72]      do_syscall_64+0xc6/0x1e0
[  882.406337][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.406337][   T72] 
[  882.407860][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  882.407860][   T72]      neigh_parms_alloc+0x1e5/0x510
[  882.407860][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  882.407860][   T72]      ipv6_find_idev+0x102/0x170
[  882.407860][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  882.407860][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  882.407860][   T72]      netlink_rcv_skb+0x130/0x360
[  882.407860][   T72]      netlink_unicast+0x449/0x710
[  882.407860][   T72]      netlink_sendmsg+0x723/0xbe0
[  882.407860][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  882.407860][   T72]      ___sys_sendmsg+0xee/0x170
[  882.407860][   T72]      __sys_sendmsg+0xcd/0x170
[  882.407860][   T72]      do_syscall_64+0xc6/0x1e0
[  882.407860][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.407860][   T72] 
[  882.409541][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  882.409798][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  882.409798][   T72]      dst_init+0x84/0x4a0
[  882.409798][   T72]      dst_alloc+0x97/0x150
[  882.409798][   T72]      ip6_dst_alloc+0x23/0x90
[  882.409798][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  882.409798][   T72]      ip6_pol_route+0x56f/0x840
[  882.409798][   T72]      fib6_rule_lookup+0x227/0x600
[  882.409798][   T72]      ip6_route_output_flags+0x251/0x460
[  882.409798][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  882.409798][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  882.409798][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  882.409798][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  882.409798][   T72]      ip6_datagram_connect+0x2c/0x50
[  882.409798][   T72]      __sys_connect+0x217/0x2a0
[  882.409798][   T72]      __x64_sys_connect+0x72/0xb0
[  882.409798][   T72]      do_syscall_64+0xc6/0x1e0
[  882.409798][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  882.409798][   T72] 
[  892.652646][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  892.653110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  892.653110][   T72]      netdev_get_by_index+0x5e/0x80
[  892.653110][   T72]      fib6_nh_init+0x3d8/0x15b0
[  892.653110][   T72]      ip6_route_info_create+0xf18/0x17d0
[  892.653110][   T72]      addrconf_f6i_alloc+0x244/0x410
[  892.653110][   T72]      ipv6_add_addr+0x411/0x2000
[  892.653110][   T72]      inet6_addr_add+0x30e/0xa40
[  892.653110][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  892.653110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.653110][   T72]      netlink_rcv_skb+0x130/0x360
[  892.653110][   T72]      netlink_unicast+0x449/0x710
[  892.653110][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.653110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.653110][   T72]      ___sys_sendmsg+0xee/0x170
[  892.653110][   T72]      __sys_sendmsg+0xcd/0x170
[  892.653110][   T72]      do_syscall_64+0xc6/0x1e0
[  892.653110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.653110][   T72] 
[  892.655112][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  892.655112][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  892.655112][   T72]      ipv6_find_idev+0x102/0x170
[  892.655112][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  892.655112][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.655112][   T72]      netlink_rcv_skb+0x130/0x360
[  892.655112][   T72]      netlink_unicast+0x449/0x710
[  892.655112][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.655112][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.655112][   T72]      ___sys_sendmsg+0xee/0x170
[  892.655112][   T72]      __sys_sendmsg+0xcd/0x170
[  892.655112][   T72]      do_syscall_64+0xc6/0x1e0
[  892.655112][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.655112][   T72] 
[  892.656648][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  892.656648][   T72]      neigh_parms_alloc+0x1e5/0x510
[  892.656648][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  892.656648][   T72]      ipv6_find_idev+0x102/0x170
[  892.656648][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  892.656648][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.656648][   T72]      netlink_rcv_skb+0x130/0x360
[  892.656648][   T72]      netlink_unicast+0x449/0x710
[  892.656648][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.656648][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.656648][   T72]      ___sys_sendmsg+0xee/0x170
[  892.656648][   T72]      __sys_sendmsg+0xcd/0x170
[  892.656648][   T72]      do_syscall_64+0xc6/0x1e0
[  892.656648][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.656648][   T72] 
[  892.658335][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  892.658598][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  892.658598][   T72]      netdev_get_by_index+0x5e/0x80
[  892.658598][   T72]      fib6_nh_init+0x3d8/0x15b0
[  892.658598][   T72]      ip6_route_info_create+0xf18/0x17d0
[  892.658598][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  892.658598][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  892.658598][   T72]      addrconf_join_anycast+0x1c0/0x220
[  892.658598][   T72]      dev_forward_change+0x2a6/0x7b0
[  892.658598][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  892.658598][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  892.658598][   T72]      proc_sys_call_handler+0x403/0x5e0
[  892.658598][   T72]      vfs_write+0x9e5/0x10a0
[  892.658598][   T72]      ksys_write+0xf5/0x1e0
[  892.658598][   T72]      do_syscall_64+0xc6/0x1e0
[  892.658598][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.658598][   T72] 
[  892.660439][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  892.660439][   T72]      netdev_get_by_index+0x5e/0x80
[  892.660439][   T72]      fib6_nh_init+0x3d8/0x15b0
[  892.660439][   T72]      ip6_route_info_create+0xf18/0x17d0
[  892.660439][   T72]      addrconf_f6i_alloc+0x244/0x410
[  892.660439][   T72]      ipv6_add_addr+0x411/0x2000
[  892.660439][   T72]      inet6_addr_add+0x30e/0xa40
[  892.660439][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  892.660439][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.660439][   T72]      netlink_rcv_skb+0x130/0x360
[  892.660439][   T72]      netlink_unicast+0x449/0x710
[  892.660439][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.660439][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.660439][   T72]      ___sys_sendmsg+0xee/0x170
[  892.660439][   T72]      __sys_sendmsg+0xcd/0x170
[  892.660439][   T72]      do_syscall_64+0xc6/0x1e0
[  892.660439][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.660439][   T72] 
[  892.662426][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  892.662426][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  892.662426][   T72]      ipv6_find_idev+0x102/0x170
[  892.662426][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  892.662426][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.662426][   T72]      netlink_rcv_skb+0x130/0x360
[  892.662426][   T72]      netlink_unicast+0x449/0x710
[  892.662426][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.662426][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.662426][   T72]      ___sys_sendmsg+0xee/0x170
[  892.662426][   T72]      __sys_sendmsg+0xcd/0x170
[  892.662426][   T72]      do_syscall_64+0xc6/0x1e0
[  892.662426][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.662426][   T72] 
[  892.663962][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  892.663962][   T72]      neigh_parms_alloc+0x1e5/0x510
[  892.663962][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  892.663962][   T72]      ipv6_find_idev+0x102/0x170
[  892.663962][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  892.663962][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  892.663962][   T72]      netlink_rcv_skb+0x130/0x360
[  892.663962][   T72]      netlink_unicast+0x449/0x710
[  892.663962][   T72]      netlink_sendmsg+0x723/0xbe0
[  892.663962][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  892.663962][   T72]      ___sys_sendmsg+0xee/0x170
[  892.663962][   T72]      __sys_sendmsg+0xcd/0x170
[  892.663962][   T72]      do_syscall_64+0xc6/0x1e0
[  892.663962][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.663962][   T72] 
[  892.665633][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  892.665888][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  892.665888][   T72]      dst_init+0x84/0x4a0
[  892.665888][   T72]      dst_alloc+0x97/0x150
[  892.665888][   T72]      ip6_dst_alloc+0x23/0x90
[  892.665888][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  892.665888][   T72]      ip6_pol_route+0x56f/0x840
[  892.665888][   T72]      fib6_rule_lookup+0x227/0x600
[  892.665888][   T72]      ip6_route_output_flags+0x251/0x460
[  892.665888][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  892.665888][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  892.665888][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  892.665888][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  892.665888][   T72]      ip6_datagram_connect+0x2c/0x50
[  892.665888][   T72]      __sys_connect+0x217/0x2a0
[  892.665888][   T72]      __x64_sys_connect+0x72/0xb0
[  892.665888][   T72]      do_syscall_64+0xc6/0x1e0
[  892.665888][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  892.665888][   T72] 
[  902.908641][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  902.909086][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  902.909086][   T72]      netdev_get_by_index+0x5e/0x80
[  902.909086][   T72]      fib6_nh_init+0x3d8/0x15b0
[  902.909086][   T72]      ip6_route_info_create+0xf18/0x17d0
[  902.909086][   T72]      addrconf_f6i_alloc+0x244/0x410
[  902.909086][   T72]      ipv6_add_addr+0x411/0x2000
[  902.909086][   T72]      inet6_addr_add+0x30e/0xa40
[  902.909086][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  902.909086][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.909086][   T72]      netlink_rcv_skb+0x130/0x360
[  902.909086][   T72]      netlink_unicast+0x449/0x710
[  902.909086][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.909086][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.909086][   T72]      ___sys_sendmsg+0xee/0x170
[  902.909086][   T72]      __sys_sendmsg+0xcd/0x170
[  902.909086][   T72]      do_syscall_64+0xc6/0x1e0
[  902.909086][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.909086][   T72] 
[  902.911082][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  902.911082][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  902.911082][   T72]      ipv6_find_idev+0x102/0x170
[  902.911082][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  902.911082][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.911082][   T72]      netlink_rcv_skb+0x130/0x360
[  902.911082][   T72]      netlink_unicast+0x449/0x710
[  902.911082][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.911082][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.911082][   T72]      ___sys_sendmsg+0xee/0x170
[  902.911082][   T72]      __sys_sendmsg+0xcd/0x170
[  902.911082][   T72]      do_syscall_64+0xc6/0x1e0
[  902.911082][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.911082][   T72] 
[  902.912603][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  902.912603][   T72]      neigh_parms_alloc+0x1e5/0x510
[  902.912603][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  902.912603][   T72]      ipv6_find_idev+0x102/0x170
[  902.912603][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  902.912603][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.912603][   T72]      netlink_rcv_skb+0x130/0x360
[  902.912603][   T72]      netlink_unicast+0x449/0x710
[  902.912603][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.912603][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.912603][   T72]      ___sys_sendmsg+0xee/0x170
[  902.912603][   T72]      __sys_sendmsg+0xcd/0x170
[  902.912603][   T72]      do_syscall_64+0xc6/0x1e0
[  902.912603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.912603][   T72] 
[  902.914269][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  902.914535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  902.914535][   T72]      netdev_get_by_index+0x5e/0x80
[  902.914535][   T72]      fib6_nh_init+0x3d8/0x15b0
[  902.914535][   T72]      ip6_route_info_create+0xf18/0x17d0
[  902.914535][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  902.914535][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  902.914535][   T72]      addrconf_join_anycast+0x1c0/0x220
[  902.914535][   T72]      dev_forward_change+0x2a6/0x7b0
[  902.914535][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  902.914535][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  902.914535][   T72]      proc_sys_call_handler+0x403/0x5e0
[  902.914535][   T72]      vfs_write+0x9e5/0x10a0
[  902.914535][   T72]      ksys_write+0xf5/0x1e0
[  902.914535][   T72]      do_syscall_64+0xc6/0x1e0
[  902.914535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.914535][   T72] 
[  902.916386][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  902.916386][   T72]      netdev_get_by_index+0x5e/0x80
[  902.916386][   T72]      fib6_nh_init+0x3d8/0x15b0
[  902.916386][   T72]      ip6_route_info_create+0xf18/0x17d0
[  902.916386][   T72]      addrconf_f6i_alloc+0x244/0x410
[  902.916386][   T72]      ipv6_add_addr+0x411/0x2000
[  902.916386][   T72]      inet6_addr_add+0x30e/0xa40
[  902.916386][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  902.916386][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.916386][   T72]      netlink_rcv_skb+0x130/0x360
[  902.916386][   T72]      netlink_unicast+0x449/0x710
[  902.916386][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.916386][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.916386][   T72]      ___sys_sendmsg+0xee/0x170
[  902.916386][   T72]      __sys_sendmsg+0xcd/0x170
[  902.916386][   T72]      do_syscall_64+0xc6/0x1e0
[  902.916386][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.916386][   T72] 
[  902.918360][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  902.918360][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  902.918360][   T72]      ipv6_find_idev+0x102/0x170
[  902.918360][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  902.918360][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.918360][   T72]      netlink_rcv_skb+0x130/0x360
[  902.918360][   T72]      netlink_unicast+0x449/0x710
[  902.918360][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.918360][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.918360][   T72]      ___sys_sendmsg+0xee/0x170
[  902.918360][   T72]      __sys_sendmsg+0xcd/0x170
[  902.918360][   T72]      do_syscall_64+0xc6/0x1e0
[  902.918360][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.918360][   T72] 
[  902.919883][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  902.919883][   T72]      neigh_parms_alloc+0x1e5/0x510
[  902.919883][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  902.919883][   T72]      ipv6_find_idev+0x102/0x170
[  902.919883][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  902.919883][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  902.919883][   T72]      netlink_rcv_skb+0x130/0x360
[  902.919883][   T72]      netlink_unicast+0x449/0x710
[  902.919883][   T72]      netlink_sendmsg+0x723/0xbe0
[  902.919883][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  902.919883][   T72]      ___sys_sendmsg+0xee/0x170
[  902.919883][   T72]      __sys_sendmsg+0xcd/0x170
[  902.919883][   T72]      do_syscall_64+0xc6/0x1e0
[  902.919883][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.919883][   T72] 
[  902.921545][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  902.921793][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  902.921793][   T72]      dst_init+0x84/0x4a0
[  902.921793][   T72]      dst_alloc+0x97/0x150
[  902.921793][   T72]      ip6_dst_alloc+0x23/0x90
[  902.921793][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  902.921793][   T72]      ip6_pol_route+0x56f/0x840
[  902.921793][   T72]      fib6_rule_lookup+0x227/0x600
[  902.921793][   T72]      ip6_route_output_flags+0x251/0x460
[  902.921793][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  902.921793][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  902.921793][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  902.921793][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  902.921793][   T72]      ip6_datagram_connect+0x2c/0x50
[  902.921793][   T72]      __sys_connect+0x217/0x2a0
[  902.921793][   T72]      __x64_sys_connect+0x72/0xb0
[  902.921793][   T72]      do_syscall_64+0xc6/0x1e0
[  902.921793][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  902.921793][   T72] 
[  913.164629][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  913.165062][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  913.165062][   T72]      netdev_get_by_index+0x5e/0x80
[  913.165062][   T72]      fib6_nh_init+0x3d8/0x15b0
[  913.165062][   T72]      ip6_route_info_create+0xf18/0x17d0
[  913.165062][   T72]      addrconf_f6i_alloc+0x244/0x410
[  913.165062][   T72]      ipv6_add_addr+0x411/0x2000
[  913.165062][   T72]      inet6_addr_add+0x30e/0xa40
[  913.165062][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  913.165062][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.165062][   T72]      netlink_rcv_skb+0x130/0x360
[  913.165062][   T72]      netlink_unicast+0x449/0x710
[  913.165062][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.165062][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.165062][   T72]      ___sys_sendmsg+0xee/0x170
[  913.165062][   T72]      __sys_sendmsg+0xcd/0x170
[  913.165062][   T72]      do_syscall_64+0xc6/0x1e0
[  913.165062][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.165062][   T72] 
[  913.167074][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  913.167074][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  913.167074][   T72]      ipv6_find_idev+0x102/0x170
[  913.167074][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  913.167074][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.167074][   T72]      netlink_rcv_skb+0x130/0x360
[  913.167074][   T72]      netlink_unicast+0x449/0x710
[  913.167074][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.167074][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.167074][   T72]      ___sys_sendmsg+0xee/0x170
[  913.167074][   T72]      __sys_sendmsg+0xcd/0x170
[  913.167074][   T72]      do_syscall_64+0xc6/0x1e0
[  913.167074][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.167074][   T72] 
[  913.168603][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  913.168603][   T72]      neigh_parms_alloc+0x1e5/0x510
[  913.168603][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  913.168603][   T72]      ipv6_find_idev+0x102/0x170
[  913.168603][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  913.168603][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.168603][   T72]      netlink_rcv_skb+0x130/0x360
[  913.168603][   T72]      netlink_unicast+0x449/0x710
[  913.168603][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.168603][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.168603][   T72]      ___sys_sendmsg+0xee/0x170
[  913.168603][   T72]      __sys_sendmsg+0xcd/0x170
[  913.168603][   T72]      do_syscall_64+0xc6/0x1e0
[  913.168603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.168603][   T72] 
[  913.170272][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  913.170540][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  913.170540][   T72]      netdev_get_by_index+0x5e/0x80
[  913.170540][   T72]      fib6_nh_init+0x3d8/0x15b0
[  913.170540][   T72]      ip6_route_info_create+0xf18/0x17d0
[  913.170540][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  913.170540][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  913.170540][   T72]      addrconf_join_anycast+0x1c0/0x220
[  913.170540][   T72]      dev_forward_change+0x2a6/0x7b0
[  913.170540][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  913.170540][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  913.170540][   T72]      proc_sys_call_handler+0x403/0x5e0
[  913.170540][   T72]      vfs_write+0x9e5/0x10a0
[  913.170540][   T72]      ksys_write+0xf5/0x1e0
[  913.170540][   T72]      do_syscall_64+0xc6/0x1e0
[  913.170540][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.170540][   T72] 
[  913.172376][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  913.172376][   T72]      netdev_get_by_index+0x5e/0x80
[  913.172376][   T72]      fib6_nh_init+0x3d8/0x15b0
[  913.172376][   T72]      ip6_route_info_create+0xf18/0x17d0
[  913.172376][   T72]      addrconf_f6i_alloc+0x244/0x410
[  913.172376][   T72]      ipv6_add_addr+0x411/0x2000
[  913.172376][   T72]      inet6_addr_add+0x30e/0xa40
[  913.172376][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  913.172376][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.172376][   T72]      netlink_rcv_skb+0x130/0x360
[  913.172376][   T72]      netlink_unicast+0x449/0x710
[  913.172376][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.172376][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.172376][   T72]      ___sys_sendmsg+0xee/0x170
[  913.172376][   T72]      __sys_sendmsg+0xcd/0x170
[  913.172376][   T72]      do_syscall_64+0xc6/0x1e0
[  913.172376][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.172376][   T72] 
[  913.174350][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  913.174350][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  913.174350][   T72]      ipv6_find_idev+0x102/0x170
[  913.174350][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  913.174350][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.174350][   T72]      netlink_rcv_skb+0x130/0x360
[  913.174350][   T72]      netlink_unicast+0x449/0x710
[  913.174350][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.174350][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.174350][   T72]      ___sys_sendmsg+0xee/0x170
[  913.174350][   T72]      __sys_sendmsg+0xcd/0x170
[  913.174350][   T72]      do_syscall_64+0xc6/0x1e0
[  913.174350][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.174350][   T72] 
[  913.176044][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  913.176044][   T72]      neigh_parms_alloc+0x1e5/0x510
[  913.176044][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  913.176044][   T72]      ipv6_find_idev+0x102/0x170
[  913.176044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  913.176044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  913.176044][   T72]      netlink_rcv_skb+0x130/0x360
[  913.176044][   T72]      netlink_unicast+0x449/0x710
[  913.176044][   T72]      netlink_sendmsg+0x723/0xbe0
[  913.176044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  913.176044][   T72]      ___sys_sendmsg+0xee/0x170
[  913.176044][   T72]      __sys_sendmsg+0xcd/0x170
[  913.176044][   T72]      do_syscall_64+0xc6/0x1e0
[  913.176044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.176044][   T72] 
[  913.178082][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  913.178374][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  913.178374][   T72]      dst_init+0x84/0x4a0
[  913.178374][   T72]      dst_alloc+0x97/0x150
[  913.178374][   T72]      ip6_dst_alloc+0x23/0x90
[  913.178374][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  913.178374][   T72]      ip6_pol_route+0x56f/0x840
[  913.178374][   T72]      fib6_rule_lookup+0x227/0x600
[  913.178374][   T72]      ip6_route_output_flags+0x251/0x460
[  913.178374][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  913.178374][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  913.178374][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  913.178374][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  913.178374][   T72]      ip6_datagram_connect+0x2c/0x50
[  913.178374][   T72]      __sys_connect+0x217/0x2a0
[  913.178374][   T72]      __x64_sys_connect+0x72/0xb0
[  913.178374][   T72]      do_syscall_64+0xc6/0x1e0
[  913.178374][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  913.178374][   T72] 
[  923.420702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  923.421139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  923.421139][   T72]      netdev_get_by_index+0x5e/0x80
[  923.421139][   T72]      fib6_nh_init+0x3d8/0x15b0
[  923.421139][   T72]      ip6_route_info_create+0xf18/0x17d0
[  923.421139][   T72]      addrconf_f6i_alloc+0x244/0x410
[  923.421139][   T72]      ipv6_add_addr+0x411/0x2000
[  923.421139][   T72]      inet6_addr_add+0x30e/0xa40
[  923.421139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  923.421139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.421139][   T72]      netlink_rcv_skb+0x130/0x360
[  923.421139][   T72]      netlink_unicast+0x449/0x710
[  923.421139][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.421139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.421139][   T72]      ___sys_sendmsg+0xee/0x170
[  923.421139][   T72]      __sys_sendmsg+0xcd/0x170
[  923.421139][   T72]      do_syscall_64+0xc6/0x1e0
[  923.421139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.421139][   T72] 
[  923.423134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  923.423134][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  923.423134][   T72]      ipv6_find_idev+0x102/0x170
[  923.423134][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  923.423134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.423134][   T72]      netlink_rcv_skb+0x130/0x360
[  923.423134][   T72]      netlink_unicast+0x449/0x710
[  923.423134][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.423134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.423134][   T72]      ___sys_sendmsg+0xee/0x170
[  923.423134][   T72]      __sys_sendmsg+0xcd/0x170
[  923.423134][   T72]      do_syscall_64+0xc6/0x1e0
[  923.423134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.423134][   T72] 
[  923.424650][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  923.424650][   T72]      neigh_parms_alloc+0x1e5/0x510
[  923.424650][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  923.424650][   T72]      ipv6_find_idev+0x102/0x170
[  923.424650][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  923.424650][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.424650][   T72]      netlink_rcv_skb+0x130/0x360
[  923.424650][   T72]      netlink_unicast+0x449/0x710
[  923.424650][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.424650][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.424650][   T72]      ___sys_sendmsg+0xee/0x170
[  923.424650][   T72]      __sys_sendmsg+0xcd/0x170
[  923.424650][   T72]      do_syscall_64+0xc6/0x1e0
[  923.424650][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.424650][   T72] 
[  923.426311][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  923.426579][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  923.426579][   T72]      netdev_get_by_index+0x5e/0x80
[  923.426579][   T72]      fib6_nh_init+0x3d8/0x15b0
[  923.426579][   T72]      ip6_route_info_create+0xf18/0x17d0
[  923.426579][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  923.426579][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  923.426579][   T72]      addrconf_join_anycast+0x1c0/0x220
[  923.426579][   T72]      dev_forward_change+0x2a6/0x7b0
[  923.426579][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  923.426579][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  923.426579][   T72]      proc_sys_call_handler+0x403/0x5e0
[  923.426579][   T72]      vfs_write+0x9e5/0x10a0
[  923.426579][   T72]      ksys_write+0xf5/0x1e0
[  923.426579][   T72]      do_syscall_64+0xc6/0x1e0
[  923.426579][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.426579][   T72] 
[  923.428398][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  923.428398][   T72]      netdev_get_by_index+0x5e/0x80
[  923.428398][   T72]      fib6_nh_init+0x3d8/0x15b0
[  923.428398][   T72]      ip6_route_info_create+0xf18/0x17d0
[  923.428398][   T72]      addrconf_f6i_alloc+0x244/0x410
[  923.428398][   T72]      ipv6_add_addr+0x411/0x2000
[  923.428398][   T72]      inet6_addr_add+0x30e/0xa40
[  923.428398][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  923.428398][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.428398][   T72]      netlink_rcv_skb+0x130/0x360
[  923.428398][   T72]      netlink_unicast+0x449/0x710
[  923.428398][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.428398][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.428398][   T72]      ___sys_sendmsg+0xee/0x170
[  923.428398][   T72]      __sys_sendmsg+0xcd/0x170
[  923.428398][   T72]      do_syscall_64+0xc6/0x1e0
[  923.428398][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.428398][   T72] 
[  923.430355][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  923.430355][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  923.430355][   T72]      ipv6_find_idev+0x102/0x170
[  923.430355][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  923.430355][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.430355][   T72]      netlink_rcv_skb+0x130/0x360
[  923.430355][   T72]      netlink_unicast+0x449/0x710
[  923.430355][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.430355][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.430355][   T72]      ___sys_sendmsg+0xee/0x170
[  923.430355][   T72]      __sys_sendmsg+0xcd/0x170
[  923.430355][   T72]      do_syscall_64+0xc6/0x1e0
[  923.430355][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.430355][   T72] 
[  923.431863][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  923.431863][   T72]      neigh_parms_alloc+0x1e5/0x510
[  923.431863][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  923.431863][   T72]      ipv6_find_idev+0x102/0x170
[  923.431863][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  923.431863][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  923.431863][   T72]      netlink_rcv_skb+0x130/0x360
[  923.431863][   T72]      netlink_unicast+0x449/0x710
[  923.431863][   T72]      netlink_sendmsg+0x723/0xbe0
[  923.431863][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  923.431863][   T72]      ___sys_sendmsg+0xee/0x170
[  923.431863][   T72]      __sys_sendmsg+0xcd/0x170
[  923.431863][   T72]      do_syscall_64+0xc6/0x1e0
[  923.431863][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.431863][   T72] 
[  923.433530][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  923.433783][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  923.433783][   T72]      dst_init+0x84/0x4a0
[  923.433783][   T72]      dst_alloc+0x97/0x150
[  923.433783][   T72]      ip6_dst_alloc+0x23/0x90
[  923.433783][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  923.433783][   T72]      ip6_pol_route+0x56f/0x840
[  923.433783][   T72]      fib6_rule_lookup+0x227/0x600
[  923.433783][   T72]      ip6_route_output_flags+0x251/0x460
[  923.433783][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  923.433783][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  923.433783][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  923.433783][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  923.433783][   T72]      ip6_datagram_connect+0x2c/0x50
[  923.433783][   T72]      __sys_connect+0x217/0x2a0
[  923.433783][   T72]      __x64_sys_connect+0x72/0xb0
[  923.433783][   T72]      do_syscall_64+0xc6/0x1e0
[  923.433783][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  923.433783][   T72] 
[  933.652711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  933.653212][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  933.653212][   T72]      netdev_get_by_index+0x5e/0x80
[  933.653212][   T72]      fib6_nh_init+0x3d8/0x15b0
[  933.653212][   T72]      ip6_route_info_create+0xf18/0x17d0
[  933.653212][   T72]      addrconf_f6i_alloc+0x244/0x410
[  933.653212][   T72]      ipv6_add_addr+0x411/0x2000
[  933.653212][   T72]      inet6_addr_add+0x30e/0xa40
[  933.653212][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  933.653212][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.653212][   T72]      netlink_rcv_skb+0x130/0x360
[  933.653212][   T72]      netlink_unicast+0x449/0x710
[  933.653212][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.653212][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.653212][   T72]      ___sys_sendmsg+0xee/0x170
[  933.653212][   T72]      __sys_sendmsg+0xcd/0x170
[  933.653212][   T72]      do_syscall_64+0xc6/0x1e0
[  933.653212][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.653212][   T72] 
[  933.655226][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  933.655226][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  933.655226][   T72]      ipv6_find_idev+0x102/0x170
[  933.655226][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  933.655226][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.655226][   T72]      netlink_rcv_skb+0x130/0x360
[  933.655226][   T72]      netlink_unicast+0x449/0x710
[  933.655226][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.655226][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.655226][   T72]      ___sys_sendmsg+0xee/0x170
[  933.655226][   T72]      __sys_sendmsg+0xcd/0x170
[  933.655226][   T72]      do_syscall_64+0xc6/0x1e0
[  933.655226][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.655226][   T72] 
[  933.656786][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  933.656786][   T72]      neigh_parms_alloc+0x1e5/0x510
[  933.656786][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  933.656786][   T72]      ipv6_find_idev+0x102/0x170
[  933.656786][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  933.656786][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.656786][   T72]      netlink_rcv_skb+0x130/0x360
[  933.656786][   T72]      netlink_unicast+0x449/0x710
[  933.656786][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.656786][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.656786][   T72]      ___sys_sendmsg+0xee/0x170
[  933.656786][   T72]      __sys_sendmsg+0xcd/0x170
[  933.656786][   T72]      do_syscall_64+0xc6/0x1e0
[  933.656786][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.656786][   T72] 
[  933.658501][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  933.658782][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  933.658782][   T72]      netdev_get_by_index+0x5e/0x80
[  933.658782][   T72]      fib6_nh_init+0x3d8/0x15b0
[  933.658782][   T72]      ip6_route_info_create+0xf18/0x17d0
[  933.658782][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  933.658782][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  933.658782][   T72]      addrconf_join_anycast+0x1c0/0x220
[  933.658782][   T72]      dev_forward_change+0x2a6/0x7b0
[  933.658782][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  933.658782][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  933.658782][   T72]      proc_sys_call_handler+0x403/0x5e0
[  933.658782][   T72]      vfs_write+0x9e5/0x10a0
[  933.658782][   T72]      ksys_write+0xf5/0x1e0
[  933.658782][   T72]      do_syscall_64+0xc6/0x1e0
[  933.658782][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.658782][   T72] 
[  933.660632][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  933.660632][   T72]      netdev_get_by_index+0x5e/0x80
[  933.660632][   T72]      fib6_nh_init+0x3d8/0x15b0
[  933.660632][   T72]      ip6_route_info_create+0xf18/0x17d0
[  933.660632][   T72]      addrconf_f6i_alloc+0x244/0x410
[  933.660632][   T72]      ipv6_add_addr+0x411/0x2000
[  933.660632][   T72]      inet6_addr_add+0x30e/0xa40
[  933.660632][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  933.660632][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.660632][   T72]      netlink_rcv_skb+0x130/0x360
[  933.660632][   T72]      netlink_unicast+0x449/0x710
[  933.660632][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.660632][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.660632][   T72]      ___sys_sendmsg+0xee/0x170
[  933.660632][   T72]      __sys_sendmsg+0xcd/0x170
[  933.660632][   T72]      do_syscall_64+0xc6/0x1e0
[  933.660632][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.660632][   T72] 
[  933.662618][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  933.662618][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  933.662618][   T72]      ipv6_find_idev+0x102/0x170
[  933.662618][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  933.662618][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.662618][   T72]      netlink_rcv_skb+0x130/0x360
[  933.662618][   T72]      netlink_unicast+0x449/0x710
[  933.662618][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.662618][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.662618][   T72]      ___sys_sendmsg+0xee/0x170
[  933.662618][   T72]      __sys_sendmsg+0xcd/0x170
[  933.662618][   T72]      do_syscall_64+0xc6/0x1e0
[  933.662618][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.662618][   T72] 
[  933.664171][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  933.664171][   T72]      neigh_parms_alloc+0x1e5/0x510
[  933.664171][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  933.664171][   T72]      ipv6_find_idev+0x102/0x170
[  933.664171][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  933.664171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  933.664171][   T72]      netlink_rcv_skb+0x130/0x360
[  933.664171][   T72]      netlink_unicast+0x449/0x710
[  933.664171][   T72]      netlink_sendmsg+0x723/0xbe0
[  933.664171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  933.664171][   T72]      ___sys_sendmsg+0xee/0x170
[  933.664171][   T72]      __sys_sendmsg+0xcd/0x170
[  933.664171][   T72]      do_syscall_64+0xc6/0x1e0
[  933.664171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.664171][   T72] 
[  933.665861][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  933.666099][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  933.666099][   T72]      dst_init+0x84/0x4a0
[  933.666099][   T72]      dst_alloc+0x97/0x150
[  933.666099][   T72]      ip6_dst_alloc+0x23/0x90
[  933.666099][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  933.666099][   T72]      ip6_pol_route+0x56f/0x840
[  933.666099][   T72]      fib6_rule_lookup+0x227/0x600
[  933.666099][   T72]      ip6_route_output_flags+0x251/0x460
[  933.666099][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  933.666099][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  933.666099][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  933.666099][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  933.666099][   T72]      ip6_datagram_connect+0x2c/0x50
[  933.666099][   T72]      __sys_connect+0x217/0x2a0
[  933.666099][   T72]      __x64_sys_connect+0x72/0xb0
[  933.666099][   T72]      do_syscall_64+0xc6/0x1e0
[  933.666099][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  933.666099][   T72] 
[  943.908695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  943.909076][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  943.909076][   T72]      netdev_get_by_index+0x5e/0x80
[  943.909076][   T72]      fib6_nh_init+0x3d8/0x15b0
[  943.909076][   T72]      ip6_route_info_create+0xf18/0x17d0
[  943.909076][   T72]      addrconf_f6i_alloc+0x244/0x410
[  943.909076][   T72]      ipv6_add_addr+0x411/0x2000
[  943.909076][   T72]      inet6_addr_add+0x30e/0xa40
[  943.909076][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  943.909076][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.909076][   T72]      netlink_rcv_skb+0x130/0x360
[  943.909076][   T72]      netlink_unicast+0x449/0x710
[  943.909076][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.909076][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.909076][   T72]      ___sys_sendmsg+0xee/0x170
[  943.909076][   T72]      __sys_sendmsg+0xcd/0x170
[  943.909076][   T72]      do_syscall_64+0xc6/0x1e0
[  943.909076][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.909076][   T72] 
[  943.911040][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  943.911040][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  943.911040][   T72]      ipv6_find_idev+0x102/0x170
[  943.911040][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  943.911040][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.911040][   T72]      netlink_rcv_skb+0x130/0x360
[  943.911040][   T72]      netlink_unicast+0x449/0x710
[  943.911040][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.911040][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.911040][   T72]      ___sys_sendmsg+0xee/0x170
[  943.911040][   T72]      __sys_sendmsg+0xcd/0x170
[  943.911040][   T72]      do_syscall_64+0xc6/0x1e0
[  943.911040][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.911040][   T72] 
[  943.912562][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  943.912562][   T72]      neigh_parms_alloc+0x1e5/0x510
[  943.912562][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  943.912562][   T72]      ipv6_find_idev+0x102/0x170
[  943.912562][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  943.912562][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.912562][   T72]      netlink_rcv_skb+0x130/0x360
[  943.912562][   T72]      netlink_unicast+0x449/0x710
[  943.912562][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.912562][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.912562][   T72]      ___sys_sendmsg+0xee/0x170
[  943.912562][   T72]      __sys_sendmsg+0xcd/0x170
[  943.912562][   T72]      do_syscall_64+0xc6/0x1e0
[  943.912562][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.912562][   T72] 
[  943.914224][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  943.914495][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  943.914495][   T72]      netdev_get_by_index+0x5e/0x80
[  943.914495][   T72]      fib6_nh_init+0x3d8/0x15b0
[  943.914495][   T72]      ip6_route_info_create+0xf18/0x17d0
[  943.914495][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  943.914495][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  943.914495][   T72]      addrconf_join_anycast+0x1c0/0x220
[  943.914495][   T72]      dev_forward_change+0x2a6/0x7b0
[  943.914495][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  943.914495][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  943.914495][   T72]      proc_sys_call_handler+0x403/0x5e0
[  943.914495][   T72]      vfs_write+0x9e5/0x10a0
[  943.914495][   T72]      ksys_write+0xf5/0x1e0
[  943.914495][   T72]      do_syscall_64+0xc6/0x1e0
[  943.914495][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.914495][   T72] 
[  943.916311][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  943.916311][   T72]      netdev_get_by_index+0x5e/0x80
[  943.916311][   T72]      fib6_nh_init+0x3d8/0x15b0
[  943.916311][   T72]      ip6_route_info_create+0xf18/0x17d0
[  943.916311][   T72]      addrconf_f6i_alloc+0x244/0x410
[  943.916311][   T72]      ipv6_add_addr+0x411/0x2000
[  943.916311][   T72]      inet6_addr_add+0x30e/0xa40
[  943.916311][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  943.916311][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.916311][   T72]      netlink_rcv_skb+0x130/0x360
[  943.916311][   T72]      netlink_unicast+0x449/0x710
[  943.916311][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.916311][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.916311][   T72]      ___sys_sendmsg+0xee/0x170
[  943.916311][   T72]      __sys_sendmsg+0xcd/0x170
[  943.916311][   T72]      do_syscall_64+0xc6/0x1e0
[  943.916311][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.916311][   T72] 
[  943.918261][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  943.918261][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  943.918261][   T72]      ipv6_find_idev+0x102/0x170
[  943.918261][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  943.918261][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.918261][   T72]      netlink_rcv_skb+0x130/0x360
[  943.918261][   T72]      netlink_unicast+0x449/0x710
[  943.918261][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.918261][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.918261][   T72]      ___sys_sendmsg+0xee/0x170
[  943.918261][   T72]      __sys_sendmsg+0xcd/0x170
[  943.918261][   T72]      do_syscall_64+0xc6/0x1e0
[  943.918261][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.918261][   T72] 
[  943.919773][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  943.919773][   T72]      neigh_parms_alloc+0x1e5/0x510
[  943.919773][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  943.919773][   T72]      ipv6_find_idev+0x102/0x170
[  943.919773][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  943.919773][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  943.919773][   T72]      netlink_rcv_skb+0x130/0x360
[  943.919773][   T72]      netlink_unicast+0x449/0x710
[  943.919773][   T72]      netlink_sendmsg+0x723/0xbe0
[  943.919773][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  943.919773][   T72]      ___sys_sendmsg+0xee/0x170
[  943.919773][   T72]      __sys_sendmsg+0xcd/0x170
[  943.919773][   T72]      do_syscall_64+0xc6/0x1e0
[  943.919773][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.919773][   T72] 
[  943.921420][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  943.921677][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  943.921677][   T72]      dst_init+0x84/0x4a0
[  943.921677][   T72]      dst_alloc+0x97/0x150
[  943.921677][   T72]      ip6_dst_alloc+0x23/0x90
[  943.921677][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  943.921677][   T72]      ip6_pol_route+0x56f/0x840
[  943.921677][   T72]      fib6_rule_lookup+0x227/0x600
[  943.921677][   T72]      ip6_route_output_flags+0x251/0x460
[  943.921677][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  943.921677][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  943.921677][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  943.921677][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  943.921677][   T72]      ip6_datagram_connect+0x2c/0x50
[  943.921677][   T72]      __sys_connect+0x217/0x2a0
[  943.921677][   T72]      __x64_sys_connect+0x72/0xb0
[  943.921677][   T72]      do_syscall_64+0xc6/0x1e0
[  943.921677][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  943.921677][   T72] 
[  954.164731][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  954.165115][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  954.165115][   T72]      netdev_get_by_index+0x5e/0x80
[  954.165115][   T72]      fib6_nh_init+0x3d8/0x15b0
[  954.165115][   T72]      ip6_route_info_create+0xf18/0x17d0
[  954.165115][   T72]      addrconf_f6i_alloc+0x244/0x410
[  954.165115][   T72]      ipv6_add_addr+0x411/0x2000
[  954.165115][   T72]      inet6_addr_add+0x30e/0xa40
[  954.165115][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  954.165115][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.165115][   T72]      netlink_rcv_skb+0x130/0x360
[  954.165115][   T72]      netlink_unicast+0x449/0x710
[  954.165115][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.165115][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.165115][   T72]      ___sys_sendmsg+0xee/0x170
[  954.165115][   T72]      __sys_sendmsg+0xcd/0x170
[  954.165115][   T72]      do_syscall_64+0xc6/0x1e0
[  954.165115][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.165115][   T72] 
[  954.167104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  954.167104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  954.167104][   T72]      ipv6_find_idev+0x102/0x170
[  954.167104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  954.167104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.167104][   T72]      netlink_rcv_skb+0x130/0x360
[  954.167104][   T72]      netlink_unicast+0x449/0x710
[  954.167104][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.167104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.167104][   T72]      ___sys_sendmsg+0xee/0x170
[  954.167104][   T72]      __sys_sendmsg+0xcd/0x170
[  954.167104][   T72]      do_syscall_64+0xc6/0x1e0
[  954.167104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.167104][   T72] 
[  954.168617][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  954.168617][   T72]      neigh_parms_alloc+0x1e5/0x510
[  954.168617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  954.168617][   T72]      ipv6_find_idev+0x102/0x170
[  954.168617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  954.168617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.168617][   T72]      netlink_rcv_skb+0x130/0x360
[  954.168617][   T72]      netlink_unicast+0x449/0x710
[  954.168617][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.168617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.168617][   T72]      ___sys_sendmsg+0xee/0x170
[  954.168617][   T72]      __sys_sendmsg+0xcd/0x170
[  954.168617][   T72]      do_syscall_64+0xc6/0x1e0
[  954.168617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.168617][   T72] 
[  954.170304][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  954.170572][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  954.170572][   T72]      netdev_get_by_index+0x5e/0x80
[  954.170572][   T72]      fib6_nh_init+0x3d8/0x15b0
[  954.170572][   T72]      ip6_route_info_create+0xf18/0x17d0
[  954.170572][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  954.170572][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  954.170572][   T72]      addrconf_join_anycast+0x1c0/0x220
[  954.170572][   T72]      dev_forward_change+0x2a6/0x7b0
[  954.170572][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  954.170572][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  954.170572][   T72]      proc_sys_call_handler+0x403/0x5e0
[  954.170572][   T72]      vfs_write+0x9e5/0x10a0
[  954.170572][   T72]      ksys_write+0xf5/0x1e0
[  954.170572][   T72]      do_syscall_64+0xc6/0x1e0
[  954.170572][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.170572][   T72] 
[  954.172384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  954.172384][   T72]      netdev_get_by_index+0x5e/0x80
[  954.172384][   T72]      fib6_nh_init+0x3d8/0x15b0
[  954.172384][   T72]      ip6_route_info_create+0xf18/0x17d0
[  954.172384][   T72]      addrconf_f6i_alloc+0x244/0x410
[  954.172384][   T72]      ipv6_add_addr+0x411/0x2000
[  954.172384][   T72]      inet6_addr_add+0x30e/0xa40
[  954.172384][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  954.172384][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.172384][   T72]      netlink_rcv_skb+0x130/0x360
[  954.172384][   T72]      netlink_unicast+0x449/0x710
[  954.172384][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.172384][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.172384][   T72]      ___sys_sendmsg+0xee/0x170
[  954.172384][   T72]      __sys_sendmsg+0xcd/0x170
[  954.172384][   T72]      do_syscall_64+0xc6/0x1e0
[  954.172384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.172384][   T72] 
[  954.174340][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  954.174340][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  954.174340][   T72]      ipv6_find_idev+0x102/0x170
[  954.174340][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  954.174340][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.174340][   T72]      netlink_rcv_skb+0x130/0x360
[  954.174340][   T72]      netlink_unicast+0x449/0x710
[  954.174340][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.174340][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.174340][   T72]      ___sys_sendmsg+0xee/0x170
[  954.174340][   T72]      __sys_sendmsg+0xcd/0x170
[  954.174340][   T72]      do_syscall_64+0xc6/0x1e0
[  954.174340][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.174340][   T72] 
[  954.175862][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  954.175862][   T72]      neigh_parms_alloc+0x1e5/0x510
[  954.175862][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  954.175862][   T72]      ipv6_find_idev+0x102/0x170
[  954.175862][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  954.175862][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  954.175862][   T72]      netlink_rcv_skb+0x130/0x360
[  954.175862][   T72]      netlink_unicast+0x449/0x710
[  954.175862][   T72]      netlink_sendmsg+0x723/0xbe0
[  954.175862][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  954.175862][   T72]      ___sys_sendmsg+0xee/0x170
[  954.175862][   T72]      __sys_sendmsg+0xcd/0x170
[  954.175862][   T72]      do_syscall_64+0xc6/0x1e0
[  954.175862][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.175862][   T72] 
[  954.177514][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  954.177770][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  954.177770][   T72]      dst_init+0x84/0x4a0
[  954.177770][   T72]      dst_alloc+0x97/0x150
[  954.177770][   T72]      ip6_dst_alloc+0x23/0x90
[  954.177770][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  954.177770][   T72]      ip6_pol_route+0x56f/0x840
[  954.177770][   T72]      fib6_rule_lookup+0x227/0x600
[  954.177770][   T72]      ip6_route_output_flags+0x251/0x460
[  954.177770][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  954.177770][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  954.177770][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  954.177770][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  954.177770][   T72]      ip6_datagram_connect+0x2c/0x50
[  954.177770][   T72]      __sys_connect+0x217/0x2a0
[  954.177770][   T72]      __x64_sys_connect+0x72/0xb0
[  954.177770][   T72]      do_syscall_64+0xc6/0x1e0
[  954.177770][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  954.177770][   T72] 
[  964.372689][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  964.373164][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  964.373164][   T72]      netdev_get_by_index+0x5e/0x80
[  964.373164][   T72]      fib6_nh_init+0x3d8/0x15b0
[  964.373164][   T72]      ip6_route_info_create+0xf18/0x17d0
[  964.373164][   T72]      addrconf_f6i_alloc+0x244/0x410
[  964.373164][   T72]      ipv6_add_addr+0x411/0x2000
[  964.373164][   T72]      inet6_addr_add+0x30e/0xa40
[  964.373164][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  964.373164][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.373164][   T72]      netlink_rcv_skb+0x130/0x360
[  964.373164][   T72]      netlink_unicast+0x449/0x710
[  964.373164][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.373164][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.373164][   T72]      ___sys_sendmsg+0xee/0x170
[  964.373164][   T72]      __sys_sendmsg+0xcd/0x170
[  964.373164][   T72]      do_syscall_64+0xc6/0x1e0
[  964.373164][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.373164][   T72] 
[  964.375186][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  964.375186][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  964.375186][   T72]      ipv6_find_idev+0x102/0x170
[  964.375186][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  964.375186][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.375186][   T72]      netlink_rcv_skb+0x130/0x360
[  964.375186][   T72]      netlink_unicast+0x449/0x710
[  964.375186][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.375186][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.375186][   T72]      ___sys_sendmsg+0xee/0x170
[  964.375186][   T72]      __sys_sendmsg+0xcd/0x170
[  964.375186][   T72]      do_syscall_64+0xc6/0x1e0
[  964.375186][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.375186][   T72] 
[  964.376728][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  964.376728][   T72]      neigh_parms_alloc+0x1e5/0x510
[  964.376728][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  964.376728][   T72]      ipv6_find_idev+0x102/0x170
[  964.376728][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  964.376728][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.376728][   T72]      netlink_rcv_skb+0x130/0x360
[  964.376728][   T72]      netlink_unicast+0x449/0x710
[  964.376728][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.376728][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.376728][   T72]      ___sys_sendmsg+0xee/0x170
[  964.376728][   T72]      __sys_sendmsg+0xcd/0x170
[  964.376728][   T72]      do_syscall_64+0xc6/0x1e0
[  964.376728][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.376728][   T72] 
[  964.378410][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  964.378703][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  964.378703][   T72]      netdev_get_by_index+0x5e/0x80
[  964.378703][   T72]      fib6_nh_init+0x3d8/0x15b0
[  964.378703][   T72]      ip6_route_info_create+0xf18/0x17d0
[  964.378703][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  964.378703][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  964.378703][   T72]      addrconf_join_anycast+0x1c0/0x220
[  964.378703][   T72]      dev_forward_change+0x2a6/0x7b0
[  964.378703][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  964.378703][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  964.378703][   T72]      proc_sys_call_handler+0x403/0x5e0
[  964.378703][   T72]      vfs_write+0x9e5/0x10a0
[  964.378703][   T72]      ksys_write+0xf5/0x1e0
[  964.378703][   T72]      do_syscall_64+0xc6/0x1e0
[  964.378703][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.378703][   T72] 
[  964.380543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  964.380543][   T72]      netdev_get_by_index+0x5e/0x80
[  964.380543][   T72]      fib6_nh_init+0x3d8/0x15b0
[  964.380543][   T72]      ip6_route_info_create+0xf18/0x17d0
[  964.380543][   T72]      addrconf_f6i_alloc+0x244/0x410
[  964.380543][   T72]      ipv6_add_addr+0x411/0x2000
[  964.380543][   T72]      inet6_addr_add+0x30e/0xa40
[  964.380543][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  964.380543][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.380543][   T72]      netlink_rcv_skb+0x130/0x360
[  964.380543][   T72]      netlink_unicast+0x449/0x710
[  964.380543][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.380543][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.380543][   T72]      ___sys_sendmsg+0xee/0x170
[  964.380543][   T72]      __sys_sendmsg+0xcd/0x170
[  964.380543][   T72]      do_syscall_64+0xc6/0x1e0
[  964.380543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.380543][   T72] 
[  964.382520][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  964.382520][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  964.382520][   T72]      ipv6_find_idev+0x102/0x170
[  964.382520][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  964.382520][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.382520][   T72]      netlink_rcv_skb+0x130/0x360
[  964.382520][   T72]      netlink_unicast+0x449/0x710
[  964.382520][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.382520][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.382520][   T72]      ___sys_sendmsg+0xee/0x170
[  964.382520][   T72]      __sys_sendmsg+0xcd/0x170
[  964.382520][   T72]      do_syscall_64+0xc6/0x1e0
[  964.382520][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.382520][   T72] 
[  964.384048][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  964.384048][   T72]      neigh_parms_alloc+0x1e5/0x510
[  964.384048][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  964.384048][   T72]      ipv6_find_idev+0x102/0x170
[  964.384048][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  964.384048][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  964.384048][   T72]      netlink_rcv_skb+0x130/0x360
[  964.384048][   T72]      netlink_unicast+0x449/0x710
[  964.384048][   T72]      netlink_sendmsg+0x723/0xbe0
[  964.384048][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  964.384048][   T72]      ___sys_sendmsg+0xee/0x170
[  964.384048][   T72]      __sys_sendmsg+0xcd/0x170
[  964.384048][   T72]      do_syscall_64+0xc6/0x1e0
[  964.384048][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.384048][   T72] 
[  964.385733][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  964.385975][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  964.385975][   T72]      dst_init+0x84/0x4a0
[  964.385975][   T72]      dst_alloc+0x97/0x150
[  964.385975][   T72]      ip6_dst_alloc+0x23/0x90
[  964.385975][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  964.385975][   T72]      ip6_pol_route+0x56f/0x840
[  964.385975][   T72]      fib6_rule_lookup+0x227/0x600
[  964.385975][   T72]      ip6_route_output_flags+0x251/0x460
[  964.385975][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  964.385975][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  964.385975][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  964.385975][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  964.385975][   T72]      ip6_datagram_connect+0x2c/0x50
[  964.385975][   T72]      __sys_connect+0x217/0x2a0
[  964.385975][   T72]      __x64_sys_connect+0x72/0xb0
[  964.385975][   T72]      do_syscall_64+0xc6/0x1e0
[  964.385975][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  964.385975][   T72] 
[  974.468726][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  974.469177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  974.469177][   T72]      netdev_get_by_index+0x5e/0x80
[  974.469177][   T72]      fib6_nh_init+0x3d8/0x15b0
[  974.469177][   T72]      ip6_route_info_create+0xf18/0x17d0
[  974.469177][   T72]      addrconf_f6i_alloc+0x244/0x410
[  974.469177][   T72]      ipv6_add_addr+0x411/0x2000
[  974.469177][   T72]      inet6_addr_add+0x30e/0xa40
[  974.469177][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  974.469177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.469177][   T72]      netlink_rcv_skb+0x130/0x360
[  974.469177][   T72]      netlink_unicast+0x449/0x710
[  974.469177][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.469177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.469177][   T72]      ___sys_sendmsg+0xee/0x170
[  974.469177][   T72]      __sys_sendmsg+0xcd/0x170
[  974.469177][   T72]      do_syscall_64+0xc6/0x1e0
[  974.469177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.469177][   T72] 
[  974.471176][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  974.471176][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  974.471176][   T72]      ipv6_find_idev+0x102/0x170
[  974.471176][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  974.471176][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.471176][   T72]      netlink_rcv_skb+0x130/0x360
[  974.471176][   T72]      netlink_unicast+0x449/0x710
[  974.471176][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.471176][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.471176][   T72]      ___sys_sendmsg+0xee/0x170
[  974.471176][   T72]      __sys_sendmsg+0xcd/0x170
[  974.471176][   T72]      do_syscall_64+0xc6/0x1e0
[  974.471176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.471176][   T72] 
[  974.472711][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  974.472711][   T72]      neigh_parms_alloc+0x1e5/0x510
[  974.472711][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  974.472711][   T72]      ipv6_find_idev+0x102/0x170
[  974.472711][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  974.472711][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.472711][   T72]      netlink_rcv_skb+0x130/0x360
[  974.472711][   T72]      netlink_unicast+0x449/0x710
[  974.472711][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.472711][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.472711][   T72]      ___sys_sendmsg+0xee/0x170
[  974.472711][   T72]      __sys_sendmsg+0xcd/0x170
[  974.472711][   T72]      do_syscall_64+0xc6/0x1e0
[  974.472711][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.472711][   T72] 
[  974.474409][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  974.474696][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  974.474696][   T72]      netdev_get_by_index+0x5e/0x80
[  974.474696][   T72]      fib6_nh_init+0x3d8/0x15b0
[  974.474696][   T72]      ip6_route_info_create+0xf18/0x17d0
[  974.474696][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  974.474696][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  974.474696][   T72]      addrconf_join_anycast+0x1c0/0x220
[  974.474696][   T72]      dev_forward_change+0x2a6/0x7b0
[  974.474696][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  974.474696][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  974.474696][   T72]      proc_sys_call_handler+0x403/0x5e0
[  974.474696][   T72]      vfs_write+0x9e5/0x10a0
[  974.474696][   T72]      ksys_write+0xf5/0x1e0
[  974.474696][   T72]      do_syscall_64+0xc6/0x1e0
[  974.474696][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.474696][   T72] 
[  974.476542][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  974.476542][   T72]      netdev_get_by_index+0x5e/0x80
[  974.476542][   T72]      fib6_nh_init+0x3d8/0x15b0
[  974.476542][   T72]      ip6_route_info_create+0xf18/0x17d0
[  974.476542][   T72]      addrconf_f6i_alloc+0x244/0x410
[  974.476542][   T72]      ipv6_add_addr+0x411/0x2000
[  974.476542][   T72]      inet6_addr_add+0x30e/0xa40
[  974.476542][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  974.476542][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.476542][   T72]      netlink_rcv_skb+0x130/0x360
[  974.476542][   T72]      netlink_unicast+0x449/0x710
[  974.476542][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.476542][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.476542][   T72]      ___sys_sendmsg+0xee/0x170
[  974.476542][   T72]      __sys_sendmsg+0xcd/0x170
[  974.476542][   T72]      do_syscall_64+0xc6/0x1e0
[  974.476542][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.476542][   T72] 
[  974.478523][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  974.478523][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  974.478523][   T72]      ipv6_find_idev+0x102/0x170
[  974.478523][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  974.478523][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.478523][   T72]      netlink_rcv_skb+0x130/0x360
[  974.478523][   T72]      netlink_unicast+0x449/0x710
[  974.478523][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.478523][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.478523][   T72]      ___sys_sendmsg+0xee/0x170
[  974.478523][   T72]      __sys_sendmsg+0xcd/0x170
[  974.478523][   T72]      do_syscall_64+0xc6/0x1e0
[  974.478523][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.478523][   T72] 
[  974.480063][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  974.480063][   T72]      neigh_parms_alloc+0x1e5/0x510
[  974.480063][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  974.480063][   T72]      ipv6_find_idev+0x102/0x170
[  974.480063][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  974.480063][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  974.480063][   T72]      netlink_rcv_skb+0x130/0x360
[  974.480063][   T72]      netlink_unicast+0x449/0x710
[  974.480063][   T72]      netlink_sendmsg+0x723/0xbe0
[  974.480063][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  974.480063][   T72]      ___sys_sendmsg+0xee/0x170
[  974.480063][   T72]      __sys_sendmsg+0xcd/0x170
[  974.480063][   T72]      do_syscall_64+0xc6/0x1e0
[  974.480063][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.480063][   T72] 
[  974.481997][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  974.482237][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  974.482237][   T72]      dst_init+0x84/0x4a0
[  974.482237][   T72]      dst_alloc+0x97/0x150
[  974.482237][   T72]      ip6_dst_alloc+0x23/0x90
[  974.482237][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  974.482237][   T72]      ip6_pol_route+0x56f/0x840
[  974.482237][   T72]      fib6_rule_lookup+0x227/0x600
[  974.482237][   T72]      ip6_route_output_flags+0x251/0x460
[  974.482237][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  974.482237][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  974.482237][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  974.482237][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  974.482237][   T72]      ip6_datagram_connect+0x2c/0x50
[  974.482237][   T72]      __sys_connect+0x217/0x2a0
[  974.482237][   T72]      __x64_sys_connect+0x72/0xb0
[  974.482237][   T72]      do_syscall_64+0xc6/0x1e0
[  974.482237][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  974.482237][   T72] 
[  984.356653][   T42] INFO: task modprobe:1562 blocked for more than 491 seconds.
[  984.356979][   T42]       Not tainted 6.8.0-virtme #1
[  984.357096][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  984.357299][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[  984.357543][   T42] Call Trace:
[  984.357664][   T42]  <TASK>
[  984.357734][   T42]  __schedule+0x705/0x1ac0
[  984.357867][   T42]  ? __pfx___schedule+0x10/0x10
[  984.357990][   T42]  ? schedule+0x1a5/0x210
[  984.358089][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  984.358216][   T42]  ? mark_lock+0x38/0x3e0
[  984.358309][   T42]  ? do_raw_spin_lock+0x131/0x270
[  984.358435][   T42]  ? schedule+0x1a5/0x210
[  984.358535][   T42]  schedule+0xdf/0x210
[  984.358640][   T42]  schedule_preempt_disabled+0x15/0x30
[  984.358764][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[  984.358894][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[  984.359047][   T42]  ? kasan_save_stack+0x34/0x50
[  984.359168][   T42]  ? kasan_save_stack+0x24/0x50
[  984.359291][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  984.359419][   T42]  ? lock_acquire+0x1c1/0x220
[  984.359542][   T42]  ? register_pernet_subsys+0x1a/0x50
[  984.359686][   T42]  down_write+0x1c9/0x200
[  984.359781][   T42]  ? __pfx_down_write+0x10/0x10
[  984.359902][   T42]  ? __pfx___lock_release+0x10/0x10
[  984.360029][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[  984.360217][   T42]  register_pernet_subsys+0x1a/0x50
[  984.360340][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[  984.360518][   T42]  do_one_initcall+0xc8/0x3f0
[  984.360651][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[  984.360781][   T42]  ? __create_object+0x5e/0xb0
[  984.360907][   T42]  ? kasan_unpoison+0x27/0x60
[  984.361034][   T42]  do_init_module+0x233/0x740
[  984.361166][   T42]  load_module+0x16b5/0x2350
[  984.361301][   T42]  ? __pfx_load_module+0x10/0x10
[  984.361428][   T42]  ? kernel_read_file+0x3d2/0x520
[  984.361556][   T42]  ? kernel_read_file+0x300/0x520
[  984.361690][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[  984.361822][   T42]  ? init_module_from_file+0xd2/0x130
[  984.361946][   T42]  init_module_from_file+0xd2/0x130
[  984.362068][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[  984.362221][   T42]  ? __lock_release+0x103/0x460
[  984.362344][   T42]  ? idempotent_init_module+0x32a/0x620
[  984.362476][   T42]  ? idempotent_init_module+0x32a/0x620
[  984.362616][   T42]  ? do_raw_spin_unlock+0x58/0x220
[  984.362743][   T42]  idempotent_init_module+0x342/0x620
[  984.362872][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[  984.363043][   T42]  __x64_sys_finit_module+0xbe/0x130
[  984.363167][   T42]  do_syscall_64+0xc6/0x1e0
[  984.363295][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.363447][   T42] RIP: 0033:0x7ff3fdc10e5d
[  984.363573][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  984.363767][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[  984.363952][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[  984.364131][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[  984.364310][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[  984.364493][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[  984.364698][   T42]  </TASK>
[  984.364791][   T42] 
[  984.364791][   T42] Showing all locks held in the system:
[  984.364965][   T42] 1 lock held by khungtaskd/42:
[  984.365083][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[  984.365307][   T42] 3 locks held by kworker/u16:1/72:
[  984.365423][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  984.365690][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  984.365905][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[  984.366126][   T42] 2 locks held by kworker/u20:3/1240:
[  984.366242][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[  984.366485][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[  984.366779][   T42] 1 lock held by modprobe/1562:
[  984.366898][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[  984.367143][   T42] 
[  984.367203][   T42] =============================================
[  984.367203][   T42] 
[  984.724715][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  984.725115][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  984.725115][   T72]      netdev_get_by_index+0x5e/0x80
[  984.725115][   T72]      fib6_nh_init+0x3d8/0x15b0
[  984.725115][   T72]      ip6_route_info_create+0xf18/0x17d0
[  984.725115][   T72]      addrconf_f6i_alloc+0x244/0x410
[  984.725115][   T72]      ipv6_add_addr+0x411/0x2000
[  984.725115][   T72]      inet6_addr_add+0x30e/0xa40
[  984.725115][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  984.725115][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.725115][   T72]      netlink_rcv_skb+0x130/0x360
[  984.725115][   T72]      netlink_unicast+0x449/0x710
[  984.725115][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.725115][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.725115][   T72]      ___sys_sendmsg+0xee/0x170
[  984.725115][   T72]      __sys_sendmsg+0xcd/0x170
[  984.725115][   T72]      do_syscall_64+0xc6/0x1e0
[  984.725115][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.725115][   T72] 
[  984.727089][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  984.727089][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  984.727089][   T72]      ipv6_find_idev+0x102/0x170
[  984.727089][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  984.727089][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.727089][   T72]      netlink_rcv_skb+0x130/0x360
[  984.727089][   T72]      netlink_unicast+0x449/0x710
[  984.727089][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.727089][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.727089][   T72]      ___sys_sendmsg+0xee/0x170
[  984.727089][   T72]      __sys_sendmsg+0xcd/0x170
[  984.727089][   T72]      do_syscall_64+0xc6/0x1e0
[  984.727089][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.727089][   T72] 
[  984.728598][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  984.728598][   T72]      neigh_parms_alloc+0x1e5/0x510
[  984.728598][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  984.728598][   T72]      ipv6_find_idev+0x102/0x170
[  984.728598][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  984.728598][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.728598][   T72]      netlink_rcv_skb+0x130/0x360
[  984.728598][   T72]      netlink_unicast+0x449/0x710
[  984.728598][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.728598][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.728598][   T72]      ___sys_sendmsg+0xee/0x170
[  984.728598][   T72]      __sys_sendmsg+0xcd/0x170
[  984.728598][   T72]      do_syscall_64+0xc6/0x1e0
[  984.728598][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.728598][   T72] 
[  984.730244][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  984.730506][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  984.730506][   T72]      netdev_get_by_index+0x5e/0x80
[  984.730506][   T72]      fib6_nh_init+0x3d8/0x15b0
[  984.730506][   T72]      ip6_route_info_create+0xf18/0x17d0
[  984.730506][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  984.730506][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  984.730506][   T72]      addrconf_join_anycast+0x1c0/0x220
[  984.730506][   T72]      dev_forward_change+0x2a6/0x7b0
[  984.730506][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  984.730506][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  984.730506][   T72]      proc_sys_call_handler+0x403/0x5e0
[  984.730506][   T72]      vfs_write+0x9e5/0x10a0
[  984.730506][   T72]      ksys_write+0xf5/0x1e0
[  984.730506][   T72]      do_syscall_64+0xc6/0x1e0
[  984.730506][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.730506][   T72] 
[  984.732315][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  984.732315][   T72]      netdev_get_by_index+0x5e/0x80
[  984.732315][   T72]      fib6_nh_init+0x3d8/0x15b0
[  984.732315][   T72]      ip6_route_info_create+0xf18/0x17d0
[  984.732315][   T72]      addrconf_f6i_alloc+0x244/0x410
[  984.732315][   T72]      ipv6_add_addr+0x411/0x2000
[  984.732315][   T72]      inet6_addr_add+0x30e/0xa40
[  984.732315][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  984.732315][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.732315][   T72]      netlink_rcv_skb+0x130/0x360
[  984.732315][   T72]      netlink_unicast+0x449/0x710
[  984.732315][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.732315][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.732315][   T72]      ___sys_sendmsg+0xee/0x170
[  984.732315][   T72]      __sys_sendmsg+0xcd/0x170
[  984.732315][   T72]      do_syscall_64+0xc6/0x1e0
[  984.732315][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.732315][   T72] 
[  984.734272][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  984.734272][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  984.734272][   T72]      ipv6_find_idev+0x102/0x170
[  984.734272][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  984.734272][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.734272][   T72]      netlink_rcv_skb+0x130/0x360
[  984.734272][   T72]      netlink_unicast+0x449/0x710
[  984.734272][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.734272][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.734272][   T72]      ___sys_sendmsg+0xee/0x170
[  984.734272][   T72]      __sys_sendmsg+0xcd/0x170
[  984.734272][   T72]      do_syscall_64+0xc6/0x1e0
[  984.734272][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.734272][   T72] 
[  984.735815][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  984.735815][   T72]      neigh_parms_alloc+0x1e5/0x510
[  984.735815][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  984.735815][   T72]      ipv6_find_idev+0x102/0x170
[  984.735815][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  984.735815][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  984.735815][   T72]      netlink_rcv_skb+0x130/0x360
[  984.735815][   T72]      netlink_unicast+0x449/0x710
[  984.735815][   T72]      netlink_sendmsg+0x723/0xbe0
[  984.735815][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  984.735815][   T72]      ___sys_sendmsg+0xee/0x170
[  984.735815][   T72]      __sys_sendmsg+0xcd/0x170
[  984.735815][   T72]      do_syscall_64+0xc6/0x1e0
[  984.735815][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.735815][   T72] 
[  984.737470][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  984.737715][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  984.737715][   T72]      dst_init+0x84/0x4a0
[  984.737715][   T72]      dst_alloc+0x97/0x150
[  984.737715][   T72]      ip6_dst_alloc+0x23/0x90
[  984.737715][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  984.737715][   T72]      ip6_pol_route+0x56f/0x840
[  984.737715][   T72]      fib6_rule_lookup+0x227/0x600
[  984.737715][   T72]      ip6_route_output_flags+0x251/0x460
[  984.737715][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  984.737715][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  984.737715][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  984.737715][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  984.737715][   T72]      ip6_datagram_connect+0x2c/0x50
[  984.737715][   T72]      __sys_connect+0x217/0x2a0
[  984.737715][   T72]      __x64_sys_connect+0x72/0xb0
[  984.737715][   T72]      do_syscall_64+0xc6/0x1e0
[  984.737715][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  984.737715][   T72] 
[  994.932624][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[  994.933084][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  994.933084][   T72]      netdev_get_by_index+0x5e/0x80
[  994.933084][   T72]      fib6_nh_init+0x3d8/0x15b0
[  994.933084][   T72]      ip6_route_info_create+0xf18/0x17d0
[  994.933084][   T72]      addrconf_f6i_alloc+0x244/0x410
[  994.933084][   T72]      ipv6_add_addr+0x411/0x2000
[  994.933084][   T72]      inet6_addr_add+0x30e/0xa40
[  994.933084][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  994.933084][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.933084][   T72]      netlink_rcv_skb+0x130/0x360
[  994.933084][   T72]      netlink_unicast+0x449/0x710
[  994.933084][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.933084][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.933084][   T72]      ___sys_sendmsg+0xee/0x170
[  994.933084][   T72]      __sys_sendmsg+0xcd/0x170
[  994.933084][   T72]      do_syscall_64+0xc6/0x1e0
[  994.933084][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.933084][   T72] 
[  994.935072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  994.935072][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  994.935072][   T72]      ipv6_find_idev+0x102/0x170
[  994.935072][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  994.935072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.935072][   T72]      netlink_rcv_skb+0x130/0x360
[  994.935072][   T72]      netlink_unicast+0x449/0x710
[  994.935072][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.935072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.935072][   T72]      ___sys_sendmsg+0xee/0x170
[  994.935072][   T72]      __sys_sendmsg+0xcd/0x170
[  994.935072][   T72]      do_syscall_64+0xc6/0x1e0
[  994.935072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.935072][   T72] 
[  994.936606][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[  994.936606][   T72]      neigh_parms_alloc+0x1e5/0x510
[  994.936606][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  994.936606][   T72]      ipv6_find_idev+0x102/0x170
[  994.936606][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  994.936606][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.936606][   T72]      netlink_rcv_skb+0x130/0x360
[  994.936606][   T72]      netlink_unicast+0x449/0x710
[  994.936606][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.936606][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.936606][   T72]      ___sys_sendmsg+0xee/0x170
[  994.936606][   T72]      __sys_sendmsg+0xcd/0x170
[  994.936606][   T72]      do_syscall_64+0xc6/0x1e0
[  994.936606][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.936606][   T72] 
[  994.938282][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[  994.938544][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  994.938544][   T72]      netdev_get_by_index+0x5e/0x80
[  994.938544][   T72]      fib6_nh_init+0x3d8/0x15b0
[  994.938544][   T72]      ip6_route_info_create+0xf18/0x17d0
[  994.938544][   T72]      addrconf_f6i_alloc+0x19e/0x410
[  994.938544][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[  994.938544][   T72]      addrconf_join_anycast+0x1c0/0x220
[  994.938544][   T72]      dev_forward_change+0x2a6/0x7b0
[  994.938544][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[  994.938544][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[  994.938544][   T72]      proc_sys_call_handler+0x403/0x5e0
[  994.938544][   T72]      vfs_write+0x9e5/0x10a0
[  994.938544][   T72]      ksys_write+0xf5/0x1e0
[  994.938544][   T72]      do_syscall_64+0xc6/0x1e0
[  994.938544][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.938544][   T72] 
[  994.940384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  994.940384][   T72]      netdev_get_by_index+0x5e/0x80
[  994.940384][   T72]      fib6_nh_init+0x3d8/0x15b0
[  994.940384][   T72]      ip6_route_info_create+0xf18/0x17d0
[  994.940384][   T72]      addrconf_f6i_alloc+0x244/0x410
[  994.940384][   T72]      ipv6_add_addr+0x411/0x2000
[  994.940384][   T72]      inet6_addr_add+0x30e/0xa40
[  994.940384][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[  994.940384][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.940384][   T72]      netlink_rcv_skb+0x130/0x360
[  994.940384][   T72]      netlink_unicast+0x449/0x710
[  994.940384][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.940384][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.940384][   T72]      ___sys_sendmsg+0xee/0x170
[  994.940384][   T72]      __sys_sendmsg+0xcd/0x170
[  994.940384][   T72]      do_syscall_64+0xc6/0x1e0
[  994.940384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.940384][   T72] 
[  994.942347][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  994.942347][   T72]      ipv6_add_dev+0x3ba/0x11c0
[  994.942347][   T72]      ipv6_find_idev+0x102/0x170
[  994.942347][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  994.942347][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.942347][   T72]      netlink_rcv_skb+0x130/0x360
[  994.942347][   T72]      netlink_unicast+0x449/0x710
[  994.942347][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.942347][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.942347][   T72]      ___sys_sendmsg+0xee/0x170
[  994.942347][   T72]      __sys_sendmsg+0xcd/0x170
[  994.942347][   T72]      do_syscall_64+0xc6/0x1e0
[  994.942347][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.942347][   T72] 
[  994.943861][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[  994.943861][   T72]      neigh_parms_alloc+0x1e5/0x510
[  994.943861][   T72]      ipv6_add_dev+0x2fe/0x11c0
[  994.943861][   T72]      ipv6_find_idev+0x102/0x170
[  994.943861][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[  994.943861][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[  994.943861][   T72]      netlink_rcv_skb+0x130/0x360
[  994.943861][   T72]      netlink_unicast+0x449/0x710
[  994.943861][   T72]      netlink_sendmsg+0x723/0xbe0
[  994.943861][   T72]      ____sys_sendmsg+0x7b2/0xa10
[  994.943861][   T72]      ___sys_sendmsg+0xee/0x170
[  994.943861][   T72]      __sys_sendmsg+0xcd/0x170
[  994.943861][   T72]      do_syscall_64+0xc6/0x1e0
[  994.943861][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.943861][   T72] 
[  994.945551][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[  994.945808][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[  994.945808][   T72]      dst_init+0x84/0x4a0
[  994.945808][   T72]      dst_alloc+0x97/0x150
[  994.945808][   T72]      ip6_dst_alloc+0x23/0x90
[  994.945808][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[  994.945808][   T72]      ip6_pol_route+0x56f/0x840
[  994.945808][   T72]      fib6_rule_lookup+0x227/0x600
[  994.945808][   T72]      ip6_route_output_flags+0x251/0x460
[  994.945808][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[  994.945808][   T72]      ip6_dst_lookup_flow+0x88/0x190
[  994.945808][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[  994.945808][   T72]      __ip6_datagram_connect+0xa93/0x1050
[  994.945808][   T72]      ip6_datagram_connect+0x2c/0x50
[  994.945808][   T72]      __sys_connect+0x217/0x2a0
[  994.945808][   T72]      __x64_sys_connect+0x72/0xb0
[  994.945808][   T72]      do_syscall_64+0xc6/0x1e0
[  994.945808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[  994.945808][   T72] 
[ 1005.196636][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1005.197075][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1005.197075][   T72]      netdev_get_by_index+0x5e/0x80
[ 1005.197075][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1005.197075][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1005.197075][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1005.197075][   T72]      ipv6_add_addr+0x411/0x2000
[ 1005.197075][   T72]      inet6_addr_add+0x30e/0xa40
[ 1005.197075][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1005.197075][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.197075][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.197075][   T72]      netlink_unicast+0x449/0x710
[ 1005.197075][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.197075][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.197075][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.197075][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.197075][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.197075][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.197075][   T72] 
[ 1005.199079][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1005.199079][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1005.199079][   T72]      ipv6_find_idev+0x102/0x170
[ 1005.199079][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1005.199079][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.199079][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.199079][   T72]      netlink_unicast+0x449/0x710
[ 1005.199079][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.199079][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.199079][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.199079][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.199079][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.199079][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.199079][   T72] 
[ 1005.200607][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1005.200607][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1005.200607][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1005.200607][   T72]      ipv6_find_idev+0x102/0x170
[ 1005.200607][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1005.200607][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.200607][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.200607][   T72]      netlink_unicast+0x449/0x710
[ 1005.200607][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.200607][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.200607][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.200607][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.200607][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.200607][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.200607][   T72] 
[ 1005.202304][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1005.202569][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1005.202569][   T72]      netdev_get_by_index+0x5e/0x80
[ 1005.202569][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1005.202569][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1005.202569][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1005.202569][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1005.202569][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1005.202569][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1005.202569][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1005.202569][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1005.202569][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1005.202569][   T72]      vfs_write+0x9e5/0x10a0
[ 1005.202569][   T72]      ksys_write+0xf5/0x1e0
[ 1005.202569][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.202569][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.202569][   T72] 
[ 1005.204413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1005.204413][   T72]      netdev_get_by_index+0x5e/0x80
[ 1005.204413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1005.204413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1005.204413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1005.204413][   T72]      ipv6_add_addr+0x411/0x2000
[ 1005.204413][   T72]      inet6_addr_add+0x30e/0xa40
[ 1005.204413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1005.204413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.204413][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.204413][   T72]      netlink_unicast+0x449/0x710
[ 1005.204413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.204413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.204413][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.204413][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.204413][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.204413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.204413][   T72] 
[ 1005.206399][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1005.206399][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1005.206399][   T72]      ipv6_find_idev+0x102/0x170
[ 1005.206399][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1005.206399][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.206399][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.206399][   T72]      netlink_unicast+0x449/0x710
[ 1005.206399][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.206399][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.206399][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.206399][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.206399][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.206399][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.206399][   T72] 
[ 1005.207947][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1005.207947][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1005.207947][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1005.207947][   T72]      ipv6_find_idev+0x102/0x170
[ 1005.207947][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1005.207947][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1005.207947][   T72]      netlink_rcv_skb+0x130/0x360
[ 1005.207947][   T72]      netlink_unicast+0x449/0x710
[ 1005.207947][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1005.207947][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1005.207947][   T72]      ___sys_sendmsg+0xee/0x170
[ 1005.207947][   T72]      __sys_sendmsg+0xcd/0x170
[ 1005.207947][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.207947][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.207947][   T72] 
[ 1005.209614][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1005.209850][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1005.209850][   T72]      dst_init+0x84/0x4a0
[ 1005.209850][   T72]      dst_alloc+0x97/0x150
[ 1005.209850][   T72]      ip6_dst_alloc+0x23/0x90
[ 1005.209850][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1005.209850][   T72]      ip6_pol_route+0x56f/0x840
[ 1005.209850][   T72]      fib6_rule_lookup+0x227/0x600
[ 1005.209850][   T72]      ip6_route_output_flags+0x251/0x460
[ 1005.209850][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1005.209850][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1005.209850][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1005.209850][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1005.209850][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1005.209850][   T72]      __sys_connect+0x217/0x2a0
[ 1005.209850][   T72]      __x64_sys_connect+0x72/0xb0
[ 1005.209850][   T72]      do_syscall_64+0xc6/0x1e0
[ 1005.209850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1005.209850][   T72] 
[ 1015.460707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1015.461144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1015.461144][   T72]      netdev_get_by_index+0x5e/0x80
[ 1015.461144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1015.461144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1015.461144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1015.461144][   T72]      ipv6_add_addr+0x411/0x2000
[ 1015.461144][   T72]      inet6_addr_add+0x30e/0xa40
[ 1015.461144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1015.461144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.461144][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.461144][   T72]      netlink_unicast+0x449/0x710
[ 1015.461144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.461144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.461144][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.461144][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.461144][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.461144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.461144][   T72] 
[ 1015.463135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1015.463135][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1015.463135][   T72]      ipv6_find_idev+0x102/0x170
[ 1015.463135][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1015.463135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.463135][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.463135][   T72]      netlink_unicast+0x449/0x710
[ 1015.463135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.463135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.463135][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.463135][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.463135][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.463135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.463135][   T72] 
[ 1015.464663][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1015.464663][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1015.464663][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1015.464663][   T72]      ipv6_find_idev+0x102/0x170
[ 1015.464663][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1015.464663][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.464663][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.464663][   T72]      netlink_unicast+0x449/0x710
[ 1015.464663][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.464663][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.464663][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.464663][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.464663][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.464663][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.464663][   T72] 
[ 1015.466359][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1015.466635][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1015.466635][   T72]      netdev_get_by_index+0x5e/0x80
[ 1015.466635][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1015.466635][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1015.466635][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1015.466635][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1015.466635][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1015.466635][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1015.466635][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1015.466635][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1015.466635][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1015.466635][   T72]      vfs_write+0x9e5/0x10a0
[ 1015.466635][   T72]      ksys_write+0xf5/0x1e0
[ 1015.466635][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.466635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.466635][   T72] 
[ 1015.468452][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1015.468452][   T72]      netdev_get_by_index+0x5e/0x80
[ 1015.468452][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1015.468452][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1015.468452][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1015.468452][   T72]      ipv6_add_addr+0x411/0x2000
[ 1015.468452][   T72]      inet6_addr_add+0x30e/0xa40
[ 1015.468452][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1015.468452][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.468452][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.468452][   T72]      netlink_unicast+0x449/0x710
[ 1015.468452][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.468452][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.468452][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.468452][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.468452][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.468452][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.468452][   T72] 
[ 1015.470416][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1015.470416][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1015.470416][   T72]      ipv6_find_idev+0x102/0x170
[ 1015.470416][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1015.470416][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.470416][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.470416][   T72]      netlink_unicast+0x449/0x710
[ 1015.470416][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.470416][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.470416][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.470416][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.470416][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.470416][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.470416][   T72] 
[ 1015.471928][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1015.471928][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1015.471928][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1015.471928][   T72]      ipv6_find_idev+0x102/0x170
[ 1015.471928][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1015.471928][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1015.471928][   T72]      netlink_rcv_skb+0x130/0x360
[ 1015.471928][   T72]      netlink_unicast+0x449/0x710
[ 1015.471928][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1015.471928][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1015.471928][   T72]      ___sys_sendmsg+0xee/0x170
[ 1015.471928][   T72]      __sys_sendmsg+0xcd/0x170
[ 1015.471928][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.471928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.471928][   T72] 
[ 1015.473584][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1015.473829][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1015.473829][   T72]      dst_init+0x84/0x4a0
[ 1015.473829][   T72]      dst_alloc+0x97/0x150
[ 1015.473829][   T72]      ip6_dst_alloc+0x23/0x90
[ 1015.473829][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1015.473829][   T72]      ip6_pol_route+0x56f/0x840
[ 1015.473829][   T72]      fib6_rule_lookup+0x227/0x600
[ 1015.473829][   T72]      ip6_route_output_flags+0x251/0x460
[ 1015.473829][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1015.473829][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1015.473829][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1015.473829][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1015.473829][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1015.473829][   T72]      __sys_connect+0x217/0x2a0
[ 1015.473829][   T72]      __x64_sys_connect+0x72/0xb0
[ 1015.473829][   T72]      do_syscall_64+0xc6/0x1e0
[ 1015.473829][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1015.473829][   T72] 
[ 1025.476646][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1025.477091][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1025.477091][   T72]      netdev_get_by_index+0x5e/0x80
[ 1025.477091][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1025.477091][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1025.477091][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1025.477091][   T72]      ipv6_add_addr+0x411/0x2000
[ 1025.477091][   T72]      inet6_addr_add+0x30e/0xa40
[ 1025.477091][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1025.477091][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.477091][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.477091][   T72]      netlink_unicast+0x449/0x710
[ 1025.477091][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.477091][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.477091][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.477091][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.477091][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.477091][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.477091][   T72] 
[ 1025.479094][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1025.479094][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1025.479094][   T72]      ipv6_find_idev+0x102/0x170
[ 1025.479094][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1025.479094][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.479094][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.479094][   T72]      netlink_unicast+0x449/0x710
[ 1025.479094][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.479094][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.479094][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.479094][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.479094][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.479094][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.479094][   T72] 
[ 1025.480632][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1025.480632][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1025.480632][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1025.480632][   T72]      ipv6_find_idev+0x102/0x170
[ 1025.480632][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1025.480632][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.480632][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.480632][   T72]      netlink_unicast+0x449/0x710
[ 1025.480632][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.480632][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.480632][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.480632][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.480632][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.480632][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.480632][   T72] 
[ 1025.482318][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1025.482581][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1025.482581][   T72]      netdev_get_by_index+0x5e/0x80
[ 1025.482581][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1025.482581][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1025.482581][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1025.482581][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1025.482581][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1025.482581][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1025.482581][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1025.482581][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1025.482581][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1025.482581][   T72]      vfs_write+0x9e5/0x10a0
[ 1025.482581][   T72]      ksys_write+0xf5/0x1e0
[ 1025.482581][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.482581][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.482581][   T72] 
[ 1025.484419][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1025.484419][   T72]      netdev_get_by_index+0x5e/0x80
[ 1025.484419][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1025.484419][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1025.484419][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1025.484419][   T72]      ipv6_add_addr+0x411/0x2000
[ 1025.484419][   T72]      inet6_addr_add+0x30e/0xa40
[ 1025.484419][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1025.484419][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.484419][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.484419][   T72]      netlink_unicast+0x449/0x710
[ 1025.484419][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.484419][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.484419][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.484419][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.484419][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.484419][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.484419][   T72] 
[ 1025.486408][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1025.486408][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1025.486408][   T72]      ipv6_find_idev+0x102/0x170
[ 1025.486408][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1025.486408][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.486408][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.486408][   T72]      netlink_unicast+0x449/0x710
[ 1025.486408][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.486408][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.486408][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.486408][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.486408][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.486408][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.486408][   T72] 
[ 1025.487927][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1025.487927][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1025.487927][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1025.487927][   T72]      ipv6_find_idev+0x102/0x170
[ 1025.487927][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1025.487927][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1025.487927][   T72]      netlink_rcv_skb+0x130/0x360
[ 1025.487927][   T72]      netlink_unicast+0x449/0x710
[ 1025.487927][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1025.487927][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1025.487927][   T72]      ___sys_sendmsg+0xee/0x170
[ 1025.487927][   T72]      __sys_sendmsg+0xcd/0x170
[ 1025.487927][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.487927][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.487927][   T72] 
[ 1025.489647][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1025.489896][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1025.489896][   T72]      dst_init+0x84/0x4a0
[ 1025.489896][   T72]      dst_alloc+0x97/0x150
[ 1025.489896][   T72]      ip6_dst_alloc+0x23/0x90
[ 1025.489896][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1025.489896][   T72]      ip6_pol_route+0x56f/0x840
[ 1025.489896][   T72]      fib6_rule_lookup+0x227/0x600
[ 1025.489896][   T72]      ip6_route_output_flags+0x251/0x460
[ 1025.489896][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1025.489896][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1025.489896][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1025.489896][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1025.489896][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1025.489896][   T72]      __sys_connect+0x217/0x2a0
[ 1025.489896][   T72]      __x64_sys_connect+0x72/0xb0
[ 1025.489896][   T72]      do_syscall_64+0xc6/0x1e0
[ 1025.489896][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1025.489896][   T72] 
[ 1035.492696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1035.493150][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1035.493150][   T72]      netdev_get_by_index+0x5e/0x80
[ 1035.493150][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1035.493150][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1035.493150][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1035.493150][   T72]      ipv6_add_addr+0x411/0x2000
[ 1035.493150][   T72]      inet6_addr_add+0x30e/0xa40
[ 1035.493150][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1035.493150][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.493150][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.493150][   T72]      netlink_unicast+0x449/0x710
[ 1035.493150][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.493150][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.493150][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.493150][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.493150][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.493150][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.493150][   T72] 
[ 1035.495136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1035.495136][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1035.495136][   T72]      ipv6_find_idev+0x102/0x170
[ 1035.495136][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1035.495136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.495136][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.495136][   T72]      netlink_unicast+0x449/0x710
[ 1035.495136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.495136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.495136][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.495136][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.495136][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.495136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.495136][   T72] 
[ 1035.496660][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1035.496660][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1035.496660][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1035.496660][   T72]      ipv6_find_idev+0x102/0x170
[ 1035.496660][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1035.496660][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.496660][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.496660][   T72]      netlink_unicast+0x449/0x710
[ 1035.496660][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.496660][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.496660][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.496660][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.496660][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.496660][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.496660][   T72] 
[ 1035.498323][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1035.498603][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1035.498603][   T72]      netdev_get_by_index+0x5e/0x80
[ 1035.498603][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1035.498603][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1035.498603][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1035.498603][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1035.498603][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1035.498603][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1035.498603][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1035.498603][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1035.498603][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1035.498603][   T72]      vfs_write+0x9e5/0x10a0
[ 1035.498603][   T72]      ksys_write+0xf5/0x1e0
[ 1035.498603][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.498603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.498603][   T72] 
[ 1035.500432][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1035.500432][   T72]      netdev_get_by_index+0x5e/0x80
[ 1035.500432][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1035.500432][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1035.500432][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1035.500432][   T72]      ipv6_add_addr+0x411/0x2000
[ 1035.500432][   T72]      inet6_addr_add+0x30e/0xa40
[ 1035.500432][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1035.500432][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.500432][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.500432][   T72]      netlink_unicast+0x449/0x710
[ 1035.500432][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.500432][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.500432][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.500432][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.500432][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.500432][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.500432][   T72] 
[ 1035.502398][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1035.502398][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1035.502398][   T72]      ipv6_find_idev+0x102/0x170
[ 1035.502398][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1035.502398][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.502398][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.502398][   T72]      netlink_unicast+0x449/0x710
[ 1035.502398][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.502398][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.502398][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.502398][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.502398][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.502398][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.502398][   T72] 
[ 1035.503910][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1035.503910][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1035.503910][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1035.503910][   T72]      ipv6_find_idev+0x102/0x170
[ 1035.503910][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1035.503910][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1035.503910][   T72]      netlink_rcv_skb+0x130/0x360
[ 1035.503910][   T72]      netlink_unicast+0x449/0x710
[ 1035.503910][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1035.503910][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1035.503910][   T72]      ___sys_sendmsg+0xee/0x170
[ 1035.503910][   T72]      __sys_sendmsg+0xcd/0x170
[ 1035.503910][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.503910][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.503910][   T72] 
[ 1035.505615][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1035.505853][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1035.505853][   T72]      dst_init+0x84/0x4a0
[ 1035.505853][   T72]      dst_alloc+0x97/0x150
[ 1035.505853][   T72]      ip6_dst_alloc+0x23/0x90
[ 1035.505853][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1035.505853][   T72]      ip6_pol_route+0x56f/0x840
[ 1035.505853][   T72]      fib6_rule_lookup+0x227/0x600
[ 1035.505853][   T72]      ip6_route_output_flags+0x251/0x460
[ 1035.505853][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1035.505853][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1035.505853][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1035.505853][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1035.505853][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1035.505853][   T72]      __sys_connect+0x217/0x2a0
[ 1035.505853][   T72]      __x64_sys_connect+0x72/0xb0
[ 1035.505853][   T72]      do_syscall_64+0xc6/0x1e0
[ 1035.505853][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1035.505853][   T72] 
[ 1045.748709][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1045.749179][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1045.749179][   T72]      netdev_get_by_index+0x5e/0x80
[ 1045.749179][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1045.749179][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1045.749179][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1045.749179][   T72]      ipv6_add_addr+0x411/0x2000
[ 1045.749179][   T72]      inet6_addr_add+0x30e/0xa40
[ 1045.749179][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1045.749179][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.749179][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.749179][   T72]      netlink_unicast+0x449/0x710
[ 1045.749179][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.749179][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.749179][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.749179][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.749179][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.749179][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.749179][   T72] 
[ 1045.751184][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1045.751184][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1045.751184][   T72]      ipv6_find_idev+0x102/0x170
[ 1045.751184][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1045.751184][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.751184][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.751184][   T72]      netlink_unicast+0x449/0x710
[ 1045.751184][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.751184][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.751184][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.751184][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.751184][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.751184][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.751184][   T72] 
[ 1045.752720][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1045.752720][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1045.752720][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1045.752720][   T72]      ipv6_find_idev+0x102/0x170
[ 1045.752720][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1045.752720][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.752720][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.752720][   T72]      netlink_unicast+0x449/0x710
[ 1045.752720][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.752720][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.752720][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.752720][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.752720][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.752720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.752720][   T72] 
[ 1045.754412][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1045.754692][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1045.754692][   T72]      netdev_get_by_index+0x5e/0x80
[ 1045.754692][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1045.754692][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1045.754692][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1045.754692][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1045.754692][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1045.754692][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1045.754692][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1045.754692][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1045.754692][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1045.754692][   T72]      vfs_write+0x9e5/0x10a0
[ 1045.754692][   T72]      ksys_write+0xf5/0x1e0
[ 1045.754692][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.754692][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.754692][   T72] 
[ 1045.756557][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1045.756557][   T72]      netdev_get_by_index+0x5e/0x80
[ 1045.756557][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1045.756557][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1045.756557][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1045.756557][   T72]      ipv6_add_addr+0x411/0x2000
[ 1045.756557][   T72]      inet6_addr_add+0x30e/0xa40
[ 1045.756557][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1045.756557][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.756557][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.756557][   T72]      netlink_unicast+0x449/0x710
[ 1045.756557][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.756557][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.756557][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.756557][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.756557][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.756557][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.756557][   T72] 
[ 1045.758547][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1045.758547][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1045.758547][   T72]      ipv6_find_idev+0x102/0x170
[ 1045.758547][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1045.758547][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.758547][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.758547][   T72]      netlink_unicast+0x449/0x710
[ 1045.758547][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.758547][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.758547][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.758547][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.758547][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.758547][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.758547][   T72] 
[ 1045.760082][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1045.760082][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1045.760082][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1045.760082][   T72]      ipv6_find_idev+0x102/0x170
[ 1045.760082][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1045.760082][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1045.760082][   T72]      netlink_rcv_skb+0x130/0x360
[ 1045.760082][   T72]      netlink_unicast+0x449/0x710
[ 1045.760082][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1045.760082][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1045.760082][   T72]      ___sys_sendmsg+0xee/0x170
[ 1045.760082][   T72]      __sys_sendmsg+0xcd/0x170
[ 1045.760082][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.760082][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.760082][   T72] 
[ 1045.761764][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1045.762014][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1045.762014][   T72]      dst_init+0x84/0x4a0
[ 1045.762014][   T72]      dst_alloc+0x97/0x150
[ 1045.762014][   T72]      ip6_dst_alloc+0x23/0x90
[ 1045.762014][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1045.762014][   T72]      ip6_pol_route+0x56f/0x840
[ 1045.762014][   T72]      fib6_rule_lookup+0x227/0x600
[ 1045.762014][   T72]      ip6_route_output_flags+0x251/0x460
[ 1045.762014][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1045.762014][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1045.762014][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1045.762014][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1045.762014][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1045.762014][   T72]      __sys_connect+0x217/0x2a0
[ 1045.762014][   T72]      __x64_sys_connect+0x72/0xb0
[ 1045.762014][   T72]      do_syscall_64+0xc6/0x1e0
[ 1045.762014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1045.762014][   T72] 
[ 1056.004656][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1056.005122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1056.005122][   T72]      netdev_get_by_index+0x5e/0x80
[ 1056.005122][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1056.005122][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1056.005122][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1056.005122][   T72]      ipv6_add_addr+0x411/0x2000
[ 1056.005122][   T72]      inet6_addr_add+0x30e/0xa40
[ 1056.005122][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1056.005122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.005122][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.005122][   T72]      netlink_unicast+0x449/0x710
[ 1056.005122][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.005122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.005122][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.005122][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.005122][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.005122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.005122][   T72] 
[ 1056.007102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1056.007102][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1056.007102][   T72]      ipv6_find_idev+0x102/0x170
[ 1056.007102][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1056.007102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.007102][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.007102][   T72]      netlink_unicast+0x449/0x710
[ 1056.007102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.007102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.007102][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.007102][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.007102][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.007102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.007102][   T72] 
[ 1056.008657][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1056.008657][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1056.008657][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1056.008657][   T72]      ipv6_find_idev+0x102/0x170
[ 1056.008657][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1056.008657][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.008657][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.008657][   T72]      netlink_unicast+0x449/0x710
[ 1056.008657][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.008657][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.008657][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.008657][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.008657][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.008657][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.008657][   T72] 
[ 1056.010332][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1056.010595][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1056.010595][   T72]      netdev_get_by_index+0x5e/0x80
[ 1056.010595][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1056.010595][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1056.010595][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1056.010595][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1056.010595][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1056.010595][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1056.010595][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1056.010595][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1056.010595][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1056.010595][   T72]      vfs_write+0x9e5/0x10a0
[ 1056.010595][   T72]      ksys_write+0xf5/0x1e0
[ 1056.010595][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.010595][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.010595][   T72] 
[ 1056.012429][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1056.012429][   T72]      netdev_get_by_index+0x5e/0x80
[ 1056.012429][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1056.012429][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1056.012429][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1056.012429][   T72]      ipv6_add_addr+0x411/0x2000
[ 1056.012429][   T72]      inet6_addr_add+0x30e/0xa40
[ 1056.012429][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1056.012429][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.012429][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.012429][   T72]      netlink_unicast+0x449/0x710
[ 1056.012429][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.012429][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.012429][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.012429][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.012429][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.012429][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.012429][   T72] 
[ 1056.014390][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1056.014390][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1056.014390][   T72]      ipv6_find_idev+0x102/0x170
[ 1056.014390][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1056.014390][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.014390][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.014390][   T72]      netlink_unicast+0x449/0x710
[ 1056.014390][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.014390][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.014390][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.014390][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.014390][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.014390][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.014390][   T72] 
[ 1056.015931][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1056.015931][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1056.015931][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1056.015931][   T72]      ipv6_find_idev+0x102/0x170
[ 1056.015931][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1056.015931][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1056.015931][   T72]      netlink_rcv_skb+0x130/0x360
[ 1056.015931][   T72]      netlink_unicast+0x449/0x710
[ 1056.015931][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1056.015931][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1056.015931][   T72]      ___sys_sendmsg+0xee/0x170
[ 1056.015931][   T72]      __sys_sendmsg+0xcd/0x170
[ 1056.015931][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.015931][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.015931][   T72] 
[ 1056.017603][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1056.017841][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1056.017841][   T72]      dst_init+0x84/0x4a0
[ 1056.017841][   T72]      dst_alloc+0x97/0x150
[ 1056.017841][   T72]      ip6_dst_alloc+0x23/0x90
[ 1056.017841][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1056.017841][   T72]      ip6_pol_route+0x56f/0x840
[ 1056.017841][   T72]      fib6_rule_lookup+0x227/0x600
[ 1056.017841][   T72]      ip6_route_output_flags+0x251/0x460
[ 1056.017841][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1056.017841][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1056.017841][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1056.017841][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1056.017841][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1056.017841][   T72]      __sys_connect+0x217/0x2a0
[ 1056.017841][   T72]      __x64_sys_connect+0x72/0xb0
[ 1056.017841][   T72]      do_syscall_64+0xc6/0x1e0
[ 1056.017841][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1056.017841][   T72] 
[ 1066.260635][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1066.261121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1066.261121][   T72]      netdev_get_by_index+0x5e/0x80
[ 1066.261121][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1066.261121][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1066.261121][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1066.261121][   T72]      ipv6_add_addr+0x411/0x2000
[ 1066.261121][   T72]      inet6_addr_add+0x30e/0xa40
[ 1066.261121][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1066.261121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.261121][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.261121][   T72]      netlink_unicast+0x449/0x710
[ 1066.261121][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.261121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.261121][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.261121][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.261121][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.261121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.261121][   T72] 
[ 1066.263210][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1066.263210][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1066.263210][   T72]      ipv6_find_idev+0x102/0x170
[ 1066.263210][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1066.263210][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.263210][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.263210][   T72]      netlink_unicast+0x449/0x710
[ 1066.263210][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.263210][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.263210][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.263210][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.263210][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.263210][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.263210][   T72] 
[ 1066.264850][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1066.264850][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1066.264850][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1066.264850][   T72]      ipv6_find_idev+0x102/0x170
[ 1066.264850][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1066.264850][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.264850][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.264850][   T72]      netlink_unicast+0x449/0x710
[ 1066.264850][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.264850][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.264850][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.264850][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.264850][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.264850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.264850][   T72] 
[ 1066.266610][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1066.266912][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1066.266912][   T72]      netdev_get_by_index+0x5e/0x80
[ 1066.266912][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1066.266912][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1066.266912][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1066.266912][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1066.266912][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1066.266912][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1066.266912][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1066.266912][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1066.266912][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1066.266912][   T72]      vfs_write+0x9e5/0x10a0
[ 1066.266912][   T72]      ksys_write+0xf5/0x1e0
[ 1066.266912][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.266912][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.266912][   T72] 
[ 1066.268898][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1066.268898][   T72]      netdev_get_by_index+0x5e/0x80
[ 1066.268898][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1066.268898][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1066.268898][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1066.268898][   T72]      ipv6_add_addr+0x411/0x2000
[ 1066.268898][   T72]      inet6_addr_add+0x30e/0xa40
[ 1066.268898][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1066.268898][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.268898][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.268898][   T72]      netlink_unicast+0x449/0x710
[ 1066.268898][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.268898][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.268898][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.268898][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.268898][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.268898][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.268898][   T72] 
[ 1066.270884][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1066.270884][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1066.270884][   T72]      ipv6_find_idev+0x102/0x170
[ 1066.270884][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1066.270884][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.270884][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.270884][   T72]      netlink_unicast+0x449/0x710
[ 1066.270884][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.270884][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.270884][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.270884][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.270884][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.270884][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.270884][   T72] 
[ 1066.272416][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1066.272416][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1066.272416][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1066.272416][   T72]      ipv6_find_idev+0x102/0x170
[ 1066.272416][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1066.272416][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1066.272416][   T72]      netlink_rcv_skb+0x130/0x360
[ 1066.272416][   T72]      netlink_unicast+0x449/0x710
[ 1066.272416][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1066.272416][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1066.272416][   T72]      ___sys_sendmsg+0xee/0x170
[ 1066.272416][   T72]      __sys_sendmsg+0xcd/0x170
[ 1066.272416][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.272416][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.272416][   T72] 
[ 1066.274091][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1066.274338][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1066.274338][   T72]      dst_init+0x84/0x4a0
[ 1066.274338][   T72]      dst_alloc+0x97/0x150
[ 1066.274338][   T72]      ip6_dst_alloc+0x23/0x90
[ 1066.274338][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1066.274338][   T72]      ip6_pol_route+0x56f/0x840
[ 1066.274338][   T72]      fib6_rule_lookup+0x227/0x600
[ 1066.274338][   T72]      ip6_route_output_flags+0x251/0x460
[ 1066.274338][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1066.274338][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1066.274338][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1066.274338][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1066.274338][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1066.274338][   T72]      __sys_connect+0x217/0x2a0
[ 1066.274338][   T72]      __x64_sys_connect+0x72/0xb0
[ 1066.274338][   T72]      do_syscall_64+0xc6/0x1e0
[ 1066.274338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1066.274338][   T72] 
[ 1076.836790][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1076.837231][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1076.837231][   T72]      netdev_get_by_index+0x5e/0x80
[ 1076.837231][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1076.837231][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1076.837231][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1076.837231][   T72]      ipv6_add_addr+0x411/0x2000
[ 1076.837231][   T72]      inet6_addr_add+0x30e/0xa40
[ 1076.837231][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1076.837231][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.837231][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.837231][   T72]      netlink_unicast+0x449/0x710
[ 1076.837231][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.837231][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.837231][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.837231][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.837231][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.837231][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.837231][   T72] 
[ 1076.839218][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1076.839218][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1076.839218][   T72]      ipv6_find_idev+0x102/0x170
[ 1076.839218][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1076.839218][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.839218][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.839218][   T72]      netlink_unicast+0x449/0x710
[ 1076.839218][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.839218][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.839218][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.839218][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.839218][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.839218][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.839218][   T72] 
[ 1076.840736][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1076.840736][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1076.840736][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1076.840736][   T72]      ipv6_find_idev+0x102/0x170
[ 1076.840736][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1076.840736][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.840736][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.840736][   T72]      netlink_unicast+0x449/0x710
[ 1076.840736][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.840736][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.840736][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.840736][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.840736][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.840736][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.840736][   T72] 
[ 1076.842407][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1076.842690][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1076.842690][   T72]      netdev_get_by_index+0x5e/0x80
[ 1076.842690][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1076.842690][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1076.842690][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1076.842690][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1076.842690][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1076.842690][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1076.842690][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1076.842690][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1076.842690][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1076.842690][   T72]      vfs_write+0x9e5/0x10a0
[ 1076.842690][   T72]      ksys_write+0xf5/0x1e0
[ 1076.842690][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.842690][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.842690][   T72] 
[ 1076.844525][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1076.844525][   T72]      netdev_get_by_index+0x5e/0x80
[ 1076.844525][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1076.844525][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1076.844525][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1076.844525][   T72]      ipv6_add_addr+0x411/0x2000
[ 1076.844525][   T72]      inet6_addr_add+0x30e/0xa40
[ 1076.844525][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1076.844525][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.844525][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.844525][   T72]      netlink_unicast+0x449/0x710
[ 1076.844525][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.844525][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.844525][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.844525][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.844525][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.844525][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.844525][   T72] 
[ 1076.846512][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1076.846512][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1076.846512][   T72]      ipv6_find_idev+0x102/0x170
[ 1076.846512][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1076.846512][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.846512][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.846512][   T72]      netlink_unicast+0x449/0x710
[ 1076.846512][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.846512][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.846512][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.846512][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.846512][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.846512][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.846512][   T72] 
[ 1076.848039][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1076.848039][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1076.848039][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1076.848039][   T72]      ipv6_find_idev+0x102/0x170
[ 1076.848039][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1076.848039][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1076.848039][   T72]      netlink_rcv_skb+0x130/0x360
[ 1076.848039][   T72]      netlink_unicast+0x449/0x710
[ 1076.848039][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1076.848039][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1076.848039][   T72]      ___sys_sendmsg+0xee/0x170
[ 1076.848039][   T72]      __sys_sendmsg+0xcd/0x170
[ 1076.848039][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.848039][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.848039][   T72] 
[ 1076.849695][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1076.849932][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1076.849932][   T72]      dst_init+0x84/0x4a0
[ 1076.849932][   T72]      dst_alloc+0x97/0x150
[ 1076.849932][   T72]      ip6_dst_alloc+0x23/0x90
[ 1076.849932][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1076.849932][   T72]      ip6_pol_route+0x56f/0x840
[ 1076.849932][   T72]      fib6_rule_lookup+0x227/0x600
[ 1076.849932][   T72]      ip6_route_output_flags+0x251/0x460
[ 1076.849932][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1076.849932][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1076.849932][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1076.849932][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1076.849932][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1076.849932][   T72]      __sys_connect+0x217/0x2a0
[ 1076.849932][   T72]      __x64_sys_connect+0x72/0xb0
[ 1076.849932][   T72]      do_syscall_64+0xc6/0x1e0
[ 1076.849932][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1076.849932][   T72] 
[ 1086.884659][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1086.885205][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1086.885205][   T72]      netdev_get_by_index+0x5e/0x80
[ 1086.885205][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1086.885205][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1086.885205][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1086.885205][   T72]      ipv6_add_addr+0x411/0x2000
[ 1086.885205][   T72]      inet6_addr_add+0x30e/0xa40
[ 1086.885205][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1086.885205][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.885205][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.885205][   T72]      netlink_unicast+0x449/0x710
[ 1086.885205][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.885205][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.885205][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.885205][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.885205][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.885205][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.885205][   T72] 
[ 1086.888352][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1086.888352][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1086.888352][   T72]      ipv6_find_idev+0x102/0x170
[ 1086.888352][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1086.888352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.888352][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.888352][   T72]      netlink_unicast+0x449/0x710
[ 1086.888352][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.888352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.888352][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.888352][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.888352][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.888352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.888352][   T72] 
[ 1086.890693][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1086.890693][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1086.890693][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1086.890693][   T72]      ipv6_find_idev+0x102/0x170
[ 1086.890693][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1086.890693][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.890693][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.890693][   T72]      netlink_unicast+0x449/0x710
[ 1086.890693][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.890693][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.890693][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.890693][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.890693][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.890693][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.890693][   T72] 
[ 1086.893215][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1086.893632][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1086.893632][   T72]      netdev_get_by_index+0x5e/0x80
[ 1086.893632][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1086.893632][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1086.893632][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1086.893632][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1086.893632][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1086.893632][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1086.893632][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1086.893632][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1086.893632][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1086.893632][   T72]      vfs_write+0x9e5/0x10a0
[ 1086.893632][   T72]      ksys_write+0xf5/0x1e0
[ 1086.893632][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.893632][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.893632][   T72] 
[ 1086.896429][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1086.896429][   T72]      netdev_get_by_index+0x5e/0x80
[ 1086.896429][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1086.896429][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1086.896429][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1086.896429][   T72]      ipv6_add_addr+0x411/0x2000
[ 1086.896429][   T72]      inet6_addr_add+0x30e/0xa40
[ 1086.896429][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1086.896429][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.896429][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.896429][   T72]      netlink_unicast+0x449/0x710
[ 1086.896429][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.896429][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.896429][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.896429][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.896429][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.896429][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.896429][   T72] 
[ 1086.899364][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1086.899364][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1086.899364][   T72]      ipv6_find_idev+0x102/0x170
[ 1086.899364][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1086.899364][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.899364][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.899364][   T72]      netlink_unicast+0x449/0x710
[ 1086.899364][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.899364][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.899364][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.899364][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.899364][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.899364][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.899364][   T72] 
[ 1086.901125][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1086.901125][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1086.901125][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1086.901125][   T72]      ipv6_find_idev+0x102/0x170
[ 1086.901125][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1086.901125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1086.901125][   T72]      netlink_rcv_skb+0x130/0x360
[ 1086.901125][   T72]      netlink_unicast+0x449/0x710
[ 1086.901125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1086.901125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1086.901125][   T72]      ___sys_sendmsg+0xee/0x170
[ 1086.901125][   T72]      __sys_sendmsg+0xcd/0x170
[ 1086.901125][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.901125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.901125][   T72] 
[ 1086.903205][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1086.903466][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1086.903466][   T72]      dst_init+0x84/0x4a0
[ 1086.903466][   T72]      dst_alloc+0x97/0x150
[ 1086.903466][   T72]      ip6_dst_alloc+0x23/0x90
[ 1086.903466][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1086.903466][   T72]      ip6_pol_route+0x56f/0x840
[ 1086.903466][   T72]      fib6_rule_lookup+0x227/0x600
[ 1086.903466][   T72]      ip6_route_output_flags+0x251/0x460
[ 1086.903466][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1086.903466][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1086.903466][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1086.903466][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1086.903466][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1086.903466][   T72]      __sys_connect+0x217/0x2a0
[ 1086.903466][   T72]      __x64_sys_connect+0x72/0xb0
[ 1086.903466][   T72]      do_syscall_64+0xc6/0x1e0
[ 1086.903466][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1086.903466][   T72] 
[ 1097.148652][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1097.149036][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1097.149036][   T72]      netdev_get_by_index+0x5e/0x80
[ 1097.149036][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1097.149036][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1097.149036][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1097.149036][   T72]      ipv6_add_addr+0x411/0x2000
[ 1097.149036][   T72]      inet6_addr_add+0x30e/0xa40
[ 1097.149036][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1097.149036][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.149036][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.149036][   T72]      netlink_unicast+0x449/0x710
[ 1097.149036][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.149036][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.149036][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.149036][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.149036][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.149036][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.149036][   T72] 
[ 1097.151098][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1097.151098][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1097.151098][   T72]      ipv6_find_idev+0x102/0x170
[ 1097.151098][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1097.151098][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.151098][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.151098][   T72]      netlink_unicast+0x449/0x710
[ 1097.151098][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.151098][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.151098][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.151098][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.151098][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.151098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.151098][   T72] 
[ 1097.156140][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1097.156140][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1097.156140][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1097.156140][   T72]      ipv6_find_idev+0x102/0x170
[ 1097.156140][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1097.156140][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.156140][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.156140][   T72]      netlink_unicast+0x449/0x710
[ 1097.156140][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.156140][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.156140][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.156140][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.156140][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.156140][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.156140][   T72] 
[ 1097.157891][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1097.158177][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1097.158177][   T72]      netdev_get_by_index+0x5e/0x80
[ 1097.158177][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1097.158177][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1097.158177][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1097.158177][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1097.158177][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1097.158177][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1097.158177][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1097.158177][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1097.158177][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1097.158177][   T72]      vfs_write+0x9e5/0x10a0
[ 1097.158177][   T72]      ksys_write+0xf5/0x1e0
[ 1097.158177][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.158177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.158177][   T72] 
[ 1097.160110][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1097.160110][   T72]      netdev_get_by_index+0x5e/0x80
[ 1097.160110][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1097.160110][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1097.160110][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1097.160110][   T72]      ipv6_add_addr+0x411/0x2000
[ 1097.160110][   T72]      inet6_addr_add+0x30e/0xa40
[ 1097.160110][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1097.160110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.160110][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.160110][   T72]      netlink_unicast+0x449/0x710
[ 1097.160110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.160110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.160110][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.160110][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.160110][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.160110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.160110][   T72] 
[ 1097.162170][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1097.162170][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1097.162170][   T72]      ipv6_find_idev+0x102/0x170
[ 1097.162170][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1097.162170][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.162170][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.162170][   T72]      netlink_unicast+0x449/0x710
[ 1097.162170][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.162170][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.162170][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.162170][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.162170][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.162170][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.162170][   T72] 
[ 1097.163784][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1097.163784][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1097.163784][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1097.163784][   T72]      ipv6_find_idev+0x102/0x170
[ 1097.163784][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1097.163784][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1097.163784][   T72]      netlink_rcv_skb+0x130/0x360
[ 1097.163784][   T72]      netlink_unicast+0x449/0x710
[ 1097.163784][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1097.163784][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1097.163784][   T72]      ___sys_sendmsg+0xee/0x170
[ 1097.163784][   T72]      __sys_sendmsg+0xcd/0x170
[ 1097.163784][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.163784][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.163784][   T72] 
[ 1097.165523][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1097.165800][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1097.165800][   T72]      dst_init+0x84/0x4a0
[ 1097.165800][   T72]      dst_alloc+0x97/0x150
[ 1097.165800][   T72]      ip6_dst_alloc+0x23/0x90
[ 1097.165800][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1097.165800][   T72]      ip6_pol_route+0x56f/0x840
[ 1097.165800][   T72]      fib6_rule_lookup+0x227/0x600
[ 1097.165800][   T72]      ip6_route_output_flags+0x251/0x460
[ 1097.165800][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1097.165800][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1097.165800][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1097.165800][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1097.165800][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1097.165800][   T72]      __sys_connect+0x217/0x2a0
[ 1097.165800][   T72]      __x64_sys_connect+0x72/0xb0
[ 1097.165800][   T72]      do_syscall_64+0xc6/0x1e0
[ 1097.165800][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1097.165800][   T72] 
[ 1107.236652][   T42] INFO: task modprobe:1562 blocked for more than 614 seconds.
[ 1107.236943][   T42]       Not tainted 6.8.0-virtme #1
[ 1107.237063][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1107.237274][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1107.237521][   T42] Call Trace:
[ 1107.237647][   T42]  <TASK>
[ 1107.237729][   T42]  __schedule+0x705/0x1ac0
[ 1107.237874][   T42]  ? __pfx___schedule+0x10/0x10
[ 1107.238011][   T42]  ? schedule+0x1a5/0x210
[ 1107.238108][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1107.238239][   T42]  ? mark_lock+0x38/0x3e0
[ 1107.238345][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1107.238474][   T42]  ? schedule+0x1a5/0x210
[ 1107.238574][   T42]  schedule+0xdf/0x210
[ 1107.238696][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1107.238843][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1107.238972][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1107.239125][   T42]  ? kasan_save_stack+0x34/0x50
[ 1107.239249][   T42]  ? kasan_save_stack+0x24/0x50
[ 1107.239375][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1107.239504][   T42]  ? lock_acquire+0x1c1/0x220
[ 1107.239635][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1107.239784][   T42]  down_write+0x1c9/0x200
[ 1107.239898][   T42]  ? __pfx_down_write+0x10/0x10
[ 1107.240020][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1107.240150][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1107.240344][   T42]  register_pernet_subsys+0x1a/0x50
[ 1107.240467][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1107.240653][   T42]  do_one_initcall+0xc8/0x3f0
[ 1107.240787][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1107.240917][   T42]  ? __create_object+0x5e/0xb0
[ 1107.241046][   T42]  ? kasan_unpoison+0x27/0x60
[ 1107.241173][   T42]  do_init_module+0x233/0x740
[ 1107.241303][   T42]  load_module+0x16b5/0x2350
[ 1107.241441][   T42]  ? __pfx_load_module+0x10/0x10
[ 1107.241564][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1107.241713][   T42]  ? kernel_read_file+0x300/0x520
[ 1107.241852][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1107.241987][   T42]  ? init_module_from_file+0xd2/0x130
[ 1107.242109][   T42]  init_module_from_file+0xd2/0x130
[ 1107.242231][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1107.242382][   T42]  ? __lock_release+0x103/0x460
[ 1107.242508][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1107.242651][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1107.242785][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1107.242911][   T42]  idempotent_init_module+0x342/0x620
[ 1107.243038][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1107.243207][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1107.243331][   T42]  do_syscall_64+0xc6/0x1e0
[ 1107.243461][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.243624][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1107.243758][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1107.243958][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1107.244141][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1107.244323][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1107.244505][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1107.244697][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1107.244946][   T42]  </TASK>
[ 1107.245039][   T42] 
[ 1107.245039][   T42] Showing all locks held in the system:
[ 1107.245217][   T42] 1 lock held by khungtaskd/42:
[ 1107.245337][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1107.245562][   T42] 3 locks held by kworker/u16:1/72:
[ 1107.245699][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1107.245955][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1107.246171][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1107.246392][   T42] 2 locks held by kworker/u20:3/1240:
[ 1107.246507][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1107.246762][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1107.247039][   T42] 1 lock held by modprobe/1562:
[ 1107.247155][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1107.247421][   T42] 
[ 1107.247485][   T42] =============================================
[ 1107.247485][   T42] 
[ 1107.404635][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1107.404987][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1107.404987][   T72]      netdev_get_by_index+0x5e/0x80
[ 1107.404987][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1107.404987][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1107.404987][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1107.404987][   T72]      ipv6_add_addr+0x411/0x2000
[ 1107.404987][   T72]      inet6_addr_add+0x30e/0xa40
[ 1107.404987][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1107.404987][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.404987][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.404987][   T72]      netlink_unicast+0x449/0x710
[ 1107.404987][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.404987][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.404987][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.404987][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.404987][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.404987][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.404987][   T72] 
[ 1107.407104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1107.407104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1107.407104][   T72]      ipv6_find_idev+0x102/0x170
[ 1107.407104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1107.407104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.407104][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.407104][   T72]      netlink_unicast+0x449/0x710
[ 1107.407104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.407104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.407104][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.407104][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.407104][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.407104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.407104][   T72] 
[ 1107.408631][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1107.408631][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1107.408631][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1107.408631][   T72]      ipv6_find_idev+0x102/0x170
[ 1107.408631][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1107.408631][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.408631][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.408631][   T72]      netlink_unicast+0x449/0x710
[ 1107.408631][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.408631][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.408631][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.408631][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.408631][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.408631][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.408631][   T72] 
[ 1107.410299][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1107.410561][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1107.410561][   T72]      netdev_get_by_index+0x5e/0x80
[ 1107.410561][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1107.410561][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1107.410561][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1107.410561][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1107.410561][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1107.410561][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1107.410561][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1107.410561][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1107.410561][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1107.410561][   T72]      vfs_write+0x9e5/0x10a0
[ 1107.410561][   T72]      ksys_write+0xf5/0x1e0
[ 1107.410561][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.410561][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.410561][   T72] 
[ 1107.412456][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1107.412456][   T72]      netdev_get_by_index+0x5e/0x80
[ 1107.412456][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1107.412456][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1107.412456][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1107.412456][   T72]      ipv6_add_addr+0x411/0x2000
[ 1107.412456][   T72]      inet6_addr_add+0x30e/0xa40
[ 1107.412456][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1107.412456][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.412456][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.412456][   T72]      netlink_unicast+0x449/0x710
[ 1107.412456][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.412456][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.412456][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.412456][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.412456][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.412456][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.412456][   T72] 
[ 1107.414517][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1107.414517][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1107.414517][   T72]      ipv6_find_idev+0x102/0x170
[ 1107.414517][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1107.414517][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.414517][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.414517][   T72]      netlink_unicast+0x449/0x710
[ 1107.414517][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.414517][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.414517][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.414517][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.414517][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.414517][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.414517][   T72] 
[ 1107.416156][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1107.416156][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1107.416156][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1107.416156][   T72]      ipv6_find_idev+0x102/0x170
[ 1107.416156][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1107.416156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1107.416156][   T72]      netlink_rcv_skb+0x130/0x360
[ 1107.416156][   T72]      netlink_unicast+0x449/0x710
[ 1107.416156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1107.416156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1107.416156][   T72]      ___sys_sendmsg+0xee/0x170
[ 1107.416156][   T72]      __sys_sendmsg+0xcd/0x170
[ 1107.416156][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.416156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.416156][   T72] 
[ 1107.417879][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1107.418144][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1107.418144][   T72]      dst_init+0x84/0x4a0
[ 1107.418144][   T72]      dst_alloc+0x97/0x150
[ 1107.418144][   T72]      ip6_dst_alloc+0x23/0x90
[ 1107.418144][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1107.418144][   T72]      ip6_pol_route+0x56f/0x840
[ 1107.418144][   T72]      fib6_rule_lookup+0x227/0x600
[ 1107.418144][   T72]      ip6_route_output_flags+0x251/0x460
[ 1107.418144][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1107.418144][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1107.418144][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1107.418144][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1107.418144][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1107.418144][   T72]      __sys_connect+0x217/0x2a0
[ 1107.418144][   T72]      __x64_sys_connect+0x72/0xb0
[ 1107.418144][   T72]      do_syscall_64+0xc6/0x1e0
[ 1107.418144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1107.418144][   T72] 
[ 1117.604657][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1117.605107][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1117.605107][   T72]      netdev_get_by_index+0x5e/0x80
[ 1117.605107][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1117.605107][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1117.605107][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1117.605107][   T72]      ipv6_add_addr+0x411/0x2000
[ 1117.605107][   T72]      inet6_addr_add+0x30e/0xa40
[ 1117.605107][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1117.605107][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.605107][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.605107][   T72]      netlink_unicast+0x449/0x710
[ 1117.605107][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.605107][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.605107][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.605107][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.605107][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.605107][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.605107][   T72] 
[ 1117.607111][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1117.607111][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1117.607111][   T72]      ipv6_find_idev+0x102/0x170
[ 1117.607111][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1117.607111][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.607111][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.607111][   T72]      netlink_unicast+0x449/0x710
[ 1117.607111][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.607111][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.607111][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.607111][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.607111][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.607111][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.607111][   T72] 
[ 1117.608650][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1117.608650][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1117.608650][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1117.608650][   T72]      ipv6_find_idev+0x102/0x170
[ 1117.608650][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1117.608650][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.608650][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.608650][   T72]      netlink_unicast+0x449/0x710
[ 1117.608650][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.608650][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.608650][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.608650][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.608650][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.608650][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.608650][   T72] 
[ 1117.610318][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1117.610581][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1117.610581][   T72]      netdev_get_by_index+0x5e/0x80
[ 1117.610581][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1117.610581][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1117.610581][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1117.610581][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1117.610581][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1117.610581][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1117.610581][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1117.610581][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1117.610581][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1117.610581][   T72]      vfs_write+0x9e5/0x10a0
[ 1117.610581][   T72]      ksys_write+0xf5/0x1e0
[ 1117.610581][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.610581][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.610581][   T72] 
[ 1117.612400][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1117.612400][   T72]      netdev_get_by_index+0x5e/0x80
[ 1117.612400][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1117.612400][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1117.612400][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1117.612400][   T72]      ipv6_add_addr+0x411/0x2000
[ 1117.612400][   T72]      inet6_addr_add+0x30e/0xa40
[ 1117.612400][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1117.612400][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.612400][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.612400][   T72]      netlink_unicast+0x449/0x710
[ 1117.612400][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.612400][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.612400][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.612400][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.612400][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.612400][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.612400][   T72] 
[ 1117.614359][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1117.614359][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1117.614359][   T72]      ipv6_find_idev+0x102/0x170
[ 1117.614359][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1117.614359][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.614359][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.614359][   T72]      netlink_unicast+0x449/0x710
[ 1117.614359][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.614359][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.614359][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.614359][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.614359][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.614359][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.614359][   T72] 
[ 1117.615887][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1117.615887][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1117.615887][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1117.615887][   T72]      ipv6_find_idev+0x102/0x170
[ 1117.615887][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1117.615887][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1117.615887][   T72]      netlink_rcv_skb+0x130/0x360
[ 1117.615887][   T72]      netlink_unicast+0x449/0x710
[ 1117.615887][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1117.615887][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1117.615887][   T72]      ___sys_sendmsg+0xee/0x170
[ 1117.615887][   T72]      __sys_sendmsg+0xcd/0x170
[ 1117.615887][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.615887][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.615887][   T72] 
[ 1117.617541][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1117.617786][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1117.617786][   T72]      dst_init+0x84/0x4a0
[ 1117.617786][   T72]      dst_alloc+0x97/0x150
[ 1117.617786][   T72]      ip6_dst_alloc+0x23/0x90
[ 1117.617786][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1117.617786][   T72]      ip6_pol_route+0x56f/0x840
[ 1117.617786][   T72]      fib6_rule_lookup+0x227/0x600
[ 1117.617786][   T72]      ip6_route_output_flags+0x251/0x460
[ 1117.617786][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1117.617786][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1117.617786][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1117.617786][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1117.617786][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1117.617786][   T72]      __sys_connect+0x217/0x2a0
[ 1117.617786][   T72]      __x64_sys_connect+0x72/0xb0
[ 1117.617786][   T72]      do_syscall_64+0xc6/0x1e0
[ 1117.617786][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1117.617786][   T72] 
[ 1127.756650][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1127.757041][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1127.757041][   T72]      netdev_get_by_index+0x5e/0x80
[ 1127.757041][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1127.757041][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1127.757041][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1127.757041][   T72]      ipv6_add_addr+0x411/0x2000
[ 1127.757041][   T72]      inet6_addr_add+0x30e/0xa40
[ 1127.757041][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1127.757041][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.757041][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.757041][   T72]      netlink_unicast+0x449/0x710
[ 1127.757041][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.757041][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.757041][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.757041][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.757041][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.757041][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.757041][   T72] 
[ 1127.759173][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1127.759173][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1127.759173][   T72]      ipv6_find_idev+0x102/0x170
[ 1127.759173][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1127.759173][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.759173][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.759173][   T72]      netlink_unicast+0x449/0x710
[ 1127.759173][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.759173][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.759173][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.759173][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.759173][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.759173][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.759173][   T72] 
[ 1127.760773][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1127.760773][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1127.760773][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1127.760773][   T72]      ipv6_find_idev+0x102/0x170
[ 1127.760773][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1127.760773][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.760773][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.760773][   T72]      netlink_unicast+0x449/0x710
[ 1127.760773][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.760773][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.760773][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.760773][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.760773][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.760773][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.760773][   T72] 
[ 1127.762540][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1127.762839][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1127.762839][   T72]      netdev_get_by_index+0x5e/0x80
[ 1127.762839][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1127.762839][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1127.762839][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1127.762839][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1127.762839][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1127.762839][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1127.762839][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1127.762839][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1127.762839][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1127.762839][   T72]      vfs_write+0x9e5/0x10a0
[ 1127.762839][   T72]      ksys_write+0xf5/0x1e0
[ 1127.762839][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.762839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.762839][   T72] 
[ 1127.764753][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1127.764753][   T72]      netdev_get_by_index+0x5e/0x80
[ 1127.764753][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1127.764753][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1127.764753][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1127.764753][   T72]      ipv6_add_addr+0x411/0x2000
[ 1127.764753][   T72]      inet6_addr_add+0x30e/0xa40
[ 1127.764753][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1127.764753][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.764753][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.764753][   T72]      netlink_unicast+0x449/0x710
[ 1127.764753][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.764753][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.764753][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.764753][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.764753][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.764753][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.764753][   T72] 
[ 1127.766761][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1127.766761][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1127.766761][   T72]      ipv6_find_idev+0x102/0x170
[ 1127.766761][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1127.766761][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.766761][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.766761][   T72]      netlink_unicast+0x449/0x710
[ 1127.766761][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.766761][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.766761][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.766761][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.766761][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.766761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.766761][   T72] 
[ 1127.768272][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1127.768272][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1127.768272][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1127.768272][   T72]      ipv6_find_idev+0x102/0x170
[ 1127.768272][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1127.768272][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1127.768272][   T72]      netlink_rcv_skb+0x130/0x360
[ 1127.768272][   T72]      netlink_unicast+0x449/0x710
[ 1127.768272][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1127.768272][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1127.768272][   T72]      ___sys_sendmsg+0xee/0x170
[ 1127.768272][   T72]      __sys_sendmsg+0xcd/0x170
[ 1127.768272][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.768272][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.768272][   T72] 
[ 1127.769933][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1127.770169][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1127.770169][   T72]      dst_init+0x84/0x4a0
[ 1127.770169][   T72]      dst_alloc+0x97/0x150
[ 1127.770169][   T72]      ip6_dst_alloc+0x23/0x90
[ 1127.770169][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1127.770169][   T72]      ip6_pol_route+0x56f/0x840
[ 1127.770169][   T72]      fib6_rule_lookup+0x227/0x600
[ 1127.770169][   T72]      ip6_route_output_flags+0x251/0x460
[ 1127.770169][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1127.770169][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1127.770169][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1127.770169][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1127.770169][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1127.770169][   T72]      __sys_connect+0x217/0x2a0
[ 1127.770169][   T72]      __x64_sys_connect+0x72/0xb0
[ 1127.770169][   T72]      do_syscall_64+0xc6/0x1e0
[ 1127.770169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1127.770169][   T72] 
[ 1137.772724][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1137.773135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1137.773135][   T72]      netdev_get_by_index+0x5e/0x80
[ 1137.773135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1137.773135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1137.773135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1137.773135][   T72]      ipv6_add_addr+0x411/0x2000
[ 1137.773135][   T72]      inet6_addr_add+0x30e/0xa40
[ 1137.773135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1137.773135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.773135][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.773135][   T72]      netlink_unicast+0x449/0x710
[ 1137.773135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.773135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.773135][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.773135][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.773135][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.773135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.773135][   T72] 
[ 1137.775175][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1137.775175][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1137.775175][   T72]      ipv6_find_idev+0x102/0x170
[ 1137.775175][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1137.775175][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.775175][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.775175][   T72]      netlink_unicast+0x449/0x710
[ 1137.775175][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.775175][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.775175][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.775175][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.775175][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.775175][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.775175][   T72] 
[ 1137.776741][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1137.776741][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1137.776741][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1137.776741][   T72]      ipv6_find_idev+0x102/0x170
[ 1137.776741][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1137.776741][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.776741][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.776741][   T72]      netlink_unicast+0x449/0x710
[ 1137.776741][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.776741][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.776741][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.776741][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.776741][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.776741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.776741][   T72] 
[ 1137.778420][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1137.778706][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1137.778706][   T72]      netdev_get_by_index+0x5e/0x80
[ 1137.778706][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1137.778706][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1137.778706][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1137.778706][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1137.778706][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1137.778706][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1137.778706][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1137.778706][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1137.778706][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1137.778706][   T72]      vfs_write+0x9e5/0x10a0
[ 1137.778706][   T72]      ksys_write+0xf5/0x1e0
[ 1137.778706][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.778706][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.778706][   T72] 
[ 1137.780559][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1137.780559][   T72]      netdev_get_by_index+0x5e/0x80
[ 1137.780559][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1137.780559][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1137.780559][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1137.780559][   T72]      ipv6_add_addr+0x411/0x2000
[ 1137.780559][   T72]      inet6_addr_add+0x30e/0xa40
[ 1137.780559][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1137.780559][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.780559][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.780559][   T72]      netlink_unicast+0x449/0x710
[ 1137.780559][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.780559][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.780559][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.780559][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.780559][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.780559][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.780559][   T72] 
[ 1137.782586][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1137.782586][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1137.782586][   T72]      ipv6_find_idev+0x102/0x170
[ 1137.782586][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1137.782586][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.782586][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.782586][   T72]      netlink_unicast+0x449/0x710
[ 1137.782586][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.782586][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.782586][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.782586][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.782586][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.782586][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.782586][   T72] 
[ 1137.784112][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1137.784112][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1137.784112][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1137.784112][   T72]      ipv6_find_idev+0x102/0x170
[ 1137.784112][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1137.784112][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1137.784112][   T72]      netlink_rcv_skb+0x130/0x360
[ 1137.784112][   T72]      netlink_unicast+0x449/0x710
[ 1137.784112][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1137.784112][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1137.784112][   T72]      ___sys_sendmsg+0xee/0x170
[ 1137.784112][   T72]      __sys_sendmsg+0xcd/0x170
[ 1137.784112][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.784112][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.784112][   T72] 
[ 1137.785812][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1137.786048][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1137.786048][   T72]      dst_init+0x84/0x4a0
[ 1137.786048][   T72]      dst_alloc+0x97/0x150
[ 1137.786048][   T72]      ip6_dst_alloc+0x23/0x90
[ 1137.786048][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1137.786048][   T72]      ip6_pol_route+0x56f/0x840
[ 1137.786048][   T72]      fib6_rule_lookup+0x227/0x600
[ 1137.786048][   T72]      ip6_route_output_flags+0x251/0x460
[ 1137.786048][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1137.786048][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1137.786048][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1137.786048][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1137.786048][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1137.786048][   T72]      __sys_connect+0x217/0x2a0
[ 1137.786048][   T72]      __x64_sys_connect+0x72/0xb0
[ 1137.786048][   T72]      do_syscall_64+0xc6/0x1e0
[ 1137.786048][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1137.786048][   T72] 
[ 1148.028739][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1148.029123][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1148.029123][   T72]      netdev_get_by_index+0x5e/0x80
[ 1148.029123][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1148.029123][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1148.029123][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1148.029123][   T72]      ipv6_add_addr+0x411/0x2000
[ 1148.029123][   T72]      inet6_addr_add+0x30e/0xa40
[ 1148.029123][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1148.029123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.029123][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.029123][   T72]      netlink_unicast+0x449/0x710
[ 1148.029123][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.029123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.029123][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.029123][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.029123][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.029123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.029123][   T72] 
[ 1148.031137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1148.031137][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1148.031137][   T72]      ipv6_find_idev+0x102/0x170
[ 1148.031137][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1148.031137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.031137][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.031137][   T72]      netlink_unicast+0x449/0x710
[ 1148.031137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.031137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.031137][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.031137][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.031137][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.031137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.031137][   T72] 
[ 1148.032662][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1148.032662][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1148.032662][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1148.032662][   T72]      ipv6_find_idev+0x102/0x170
[ 1148.032662][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1148.032662][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.032662][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.032662][   T72]      netlink_unicast+0x449/0x710
[ 1148.032662][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.032662][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.032662][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.032662][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.032662][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.032662][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.032662][   T72] 
[ 1148.034349][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1148.034624][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1148.034624][   T72]      netdev_get_by_index+0x5e/0x80
[ 1148.034624][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1148.034624][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1148.034624][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1148.034624][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1148.034624][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1148.034624][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1148.034624][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1148.034624][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1148.034624][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1148.034624][   T72]      vfs_write+0x9e5/0x10a0
[ 1148.034624][   T72]      ksys_write+0xf5/0x1e0
[ 1148.034624][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.034624][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.034624][   T72] 
[ 1148.036459][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1148.036459][   T72]      netdev_get_by_index+0x5e/0x80
[ 1148.036459][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1148.036459][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1148.036459][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1148.036459][   T72]      ipv6_add_addr+0x411/0x2000
[ 1148.036459][   T72]      inet6_addr_add+0x30e/0xa40
[ 1148.036459][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1148.036459][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.036459][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.036459][   T72]      netlink_unicast+0x449/0x710
[ 1148.036459][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.036459][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.036459][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.036459][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.036459][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.036459][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.036459][   T72] 
[ 1148.038417][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1148.038417][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1148.038417][   T72]      ipv6_find_idev+0x102/0x170
[ 1148.038417][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1148.038417][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.038417][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.038417][   T72]      netlink_unicast+0x449/0x710
[ 1148.038417][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.038417][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.038417][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.038417][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.038417][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.038417][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.038417][   T72] 
[ 1148.039928][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1148.039928][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1148.039928][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1148.039928][   T72]      ipv6_find_idev+0x102/0x170
[ 1148.039928][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1148.039928][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1148.039928][   T72]      netlink_rcv_skb+0x130/0x360
[ 1148.039928][   T72]      netlink_unicast+0x449/0x710
[ 1148.039928][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1148.039928][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1148.039928][   T72]      ___sys_sendmsg+0xee/0x170
[ 1148.039928][   T72]      __sys_sendmsg+0xcd/0x170
[ 1148.039928][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.039928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.039928][   T72] 
[ 1148.041626][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1148.041864][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1148.041864][   T72]      dst_init+0x84/0x4a0
[ 1148.041864][   T72]      dst_alloc+0x97/0x150
[ 1148.041864][   T72]      ip6_dst_alloc+0x23/0x90
[ 1148.041864][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1148.041864][   T72]      ip6_pol_route+0x56f/0x840
[ 1148.041864][   T72]      fib6_rule_lookup+0x227/0x600
[ 1148.041864][   T72]      ip6_route_output_flags+0x251/0x460
[ 1148.041864][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1148.041864][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1148.041864][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1148.041864][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1148.041864][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1148.041864][   T72]      __sys_connect+0x217/0x2a0
[ 1148.041864][   T72]      __x64_sys_connect+0x72/0xb0
[ 1148.041864][   T72]      do_syscall_64+0xc6/0x1e0
[ 1148.041864][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1148.041864][   T72] 
[ 1158.284753][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1158.285141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1158.285141][   T72]      netdev_get_by_index+0x5e/0x80
[ 1158.285141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1158.285141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1158.285141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1158.285141][   T72]      ipv6_add_addr+0x411/0x2000
[ 1158.285141][   T72]      inet6_addr_add+0x30e/0xa40
[ 1158.285141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1158.285141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.285141][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.285141][   T72]      netlink_unicast+0x449/0x710
[ 1158.285141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.285141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.285141][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.285141][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.285141][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.285141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.285141][   T72] 
[ 1158.287201][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1158.287201][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1158.287201][   T72]      ipv6_find_idev+0x102/0x170
[ 1158.287201][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1158.287201][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.287201][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.287201][   T72]      netlink_unicast+0x449/0x710
[ 1158.287201][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.287201][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.287201][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.287201][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.287201][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.287201][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.287201][   T72] 
[ 1158.288730][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1158.288730][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1158.288730][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1158.288730][   T72]      ipv6_find_idev+0x102/0x170
[ 1158.288730][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1158.288730][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.288730][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.288730][   T72]      netlink_unicast+0x449/0x710
[ 1158.288730][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.288730][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.288730][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.288730][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.288730][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.288730][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.288730][   T72] 
[ 1158.290426][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1158.290714][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1158.290714][   T72]      netdev_get_by_index+0x5e/0x80
[ 1158.290714][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1158.290714][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1158.290714][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1158.290714][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1158.290714][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1158.290714][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1158.290714][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1158.290714][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1158.290714][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1158.290714][   T72]      vfs_write+0x9e5/0x10a0
[ 1158.290714][   T72]      ksys_write+0xf5/0x1e0
[ 1158.290714][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.290714][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.290714][   T72] 
[ 1158.292537][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1158.292537][   T72]      netdev_get_by_index+0x5e/0x80
[ 1158.292537][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1158.292537][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1158.292537][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1158.292537][   T72]      ipv6_add_addr+0x411/0x2000
[ 1158.292537][   T72]      inet6_addr_add+0x30e/0xa40
[ 1158.292537][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1158.292537][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.292537][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.292537][   T72]      netlink_unicast+0x449/0x710
[ 1158.292537][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.292537][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.292537][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.292537][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.292537][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.292537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.292537][   T72] 
[ 1158.294490][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1158.294490][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1158.294490][   T72]      ipv6_find_idev+0x102/0x170
[ 1158.294490][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1158.294490][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.294490][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.294490][   T72]      netlink_unicast+0x449/0x710
[ 1158.294490][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.294490][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.294490][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.294490][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.294490][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.294490][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.294490][   T72] 
[ 1158.296045][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1158.296045][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1158.296045][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1158.296045][   T72]      ipv6_find_idev+0x102/0x170
[ 1158.296045][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1158.296045][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1158.296045][   T72]      netlink_rcv_skb+0x130/0x360
[ 1158.296045][   T72]      netlink_unicast+0x449/0x710
[ 1158.296045][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1158.296045][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1158.296045][   T72]      ___sys_sendmsg+0xee/0x170
[ 1158.296045][   T72]      __sys_sendmsg+0xcd/0x170
[ 1158.296045][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.296045][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.296045][   T72] 
[ 1158.297708][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1158.297944][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1158.297944][   T72]      dst_init+0x84/0x4a0
[ 1158.297944][   T72]      dst_alloc+0x97/0x150
[ 1158.297944][   T72]      ip6_dst_alloc+0x23/0x90
[ 1158.297944][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1158.297944][   T72]      ip6_pol_route+0x56f/0x840
[ 1158.297944][   T72]      fib6_rule_lookup+0x227/0x600
[ 1158.297944][   T72]      ip6_route_output_flags+0x251/0x460
[ 1158.297944][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1158.297944][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1158.297944][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1158.297944][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1158.297944][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1158.297944][   T72]      __sys_connect+0x217/0x2a0
[ 1158.297944][   T72]      __x64_sys_connect+0x72/0xb0
[ 1158.297944][   T72]      do_syscall_64+0xc6/0x1e0
[ 1158.297944][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1158.297944][   T72] 
[ 1168.540732][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1168.541121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1168.541121][   T72]      netdev_get_by_index+0x5e/0x80
[ 1168.541121][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1168.541121][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1168.541121][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1168.541121][   T72]      ipv6_add_addr+0x411/0x2000
[ 1168.541121][   T72]      inet6_addr_add+0x30e/0xa40
[ 1168.541121][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1168.541121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.541121][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.541121][   T72]      netlink_unicast+0x449/0x710
[ 1168.541121][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.541121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.541121][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.541121][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.541121][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.541121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.541121][   T72] 
[ 1168.543093][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1168.543093][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1168.543093][   T72]      ipv6_find_idev+0x102/0x170
[ 1168.543093][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1168.543093][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.543093][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.543093][   T72]      netlink_unicast+0x449/0x710
[ 1168.543093][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.543093][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.543093][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.543093][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.543093][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.543093][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.543093][   T72] 
[ 1168.544612][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1168.544612][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1168.544612][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1168.544612][   T72]      ipv6_find_idev+0x102/0x170
[ 1168.544612][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1168.544612][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.544612][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.544612][   T72]      netlink_unicast+0x449/0x710
[ 1168.544612][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.544612][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.544612][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.544612][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.544612][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.544612][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.544612][   T72] 
[ 1168.546266][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1168.546537][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1168.546537][   T72]      netdev_get_by_index+0x5e/0x80
[ 1168.546537][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1168.546537][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1168.546537][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1168.546537][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1168.546537][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1168.546537][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1168.546537][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1168.546537][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1168.546537][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1168.546537][   T72]      vfs_write+0x9e5/0x10a0
[ 1168.546537][   T72]      ksys_write+0xf5/0x1e0
[ 1168.546537][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.546537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.546537][   T72] 
[ 1168.548353][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1168.548353][   T72]      netdev_get_by_index+0x5e/0x80
[ 1168.548353][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1168.548353][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1168.548353][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1168.548353][   T72]      ipv6_add_addr+0x411/0x2000
[ 1168.548353][   T72]      inet6_addr_add+0x30e/0xa40
[ 1168.548353][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1168.548353][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.548353][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.548353][   T72]      netlink_unicast+0x449/0x710
[ 1168.548353][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.548353][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.548353][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.548353][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.548353][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.548353][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.548353][   T72] 
[ 1168.550316][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1168.550316][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1168.550316][   T72]      ipv6_find_idev+0x102/0x170
[ 1168.550316][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1168.550316][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.550316][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.550316][   T72]      netlink_unicast+0x449/0x710
[ 1168.550316][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.550316][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.550316][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.550316][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.550316][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.550316][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.550316][   T72] 
[ 1168.551836][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1168.551836][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1168.551836][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1168.551836][   T72]      ipv6_find_idev+0x102/0x170
[ 1168.551836][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1168.551836][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1168.551836][   T72]      netlink_rcv_skb+0x130/0x360
[ 1168.551836][   T72]      netlink_unicast+0x449/0x710
[ 1168.551836][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1168.551836][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1168.551836][   T72]      ___sys_sendmsg+0xee/0x170
[ 1168.551836][   T72]      __sys_sendmsg+0xcd/0x170
[ 1168.551836][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.551836][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.551836][   T72] 
[ 1168.553479][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1168.553725][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1168.553725][   T72]      dst_init+0x84/0x4a0
[ 1168.553725][   T72]      dst_alloc+0x97/0x150
[ 1168.553725][   T72]      ip6_dst_alloc+0x23/0x90
[ 1168.553725][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1168.553725][   T72]      ip6_pol_route+0x56f/0x840
[ 1168.553725][   T72]      fib6_rule_lookup+0x227/0x600
[ 1168.553725][   T72]      ip6_route_output_flags+0x251/0x460
[ 1168.553725][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1168.553725][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1168.553725][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1168.553725][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1168.553725][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1168.553725][   T72]      __sys_connect+0x217/0x2a0
[ 1168.553725][   T72]      __x64_sys_connect+0x72/0xb0
[ 1168.553725][   T72]      do_syscall_64+0xc6/0x1e0
[ 1168.553725][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1168.553725][   T72] 
[ 1178.796710][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1178.797156][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1178.797156][   T72]      netdev_get_by_index+0x5e/0x80
[ 1178.797156][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1178.797156][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1178.797156][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1178.797156][   T72]      ipv6_add_addr+0x411/0x2000
[ 1178.797156][   T72]      inet6_addr_add+0x30e/0xa40
[ 1178.797156][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1178.797156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.797156][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.797156][   T72]      netlink_unicast+0x449/0x710
[ 1178.797156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.797156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.797156][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.797156][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.797156][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.797156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.797156][   T72] 
[ 1178.799174][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1178.799174][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1178.799174][   T72]      ipv6_find_idev+0x102/0x170
[ 1178.799174][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1178.799174][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.799174][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.799174][   T72]      netlink_unicast+0x449/0x710
[ 1178.799174][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.799174][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.799174][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.799174][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.799174][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.799174][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.799174][   T72] 
[ 1178.800724][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1178.800724][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1178.800724][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1178.800724][   T72]      ipv6_find_idev+0x102/0x170
[ 1178.800724][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1178.800724][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.800724][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.800724][   T72]      netlink_unicast+0x449/0x710
[ 1178.800724][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.800724][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.800724][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.800724][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.800724][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.800724][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.800724][   T72] 
[ 1178.802424][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1178.802720][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1178.802720][   T72]      netdev_get_by_index+0x5e/0x80
[ 1178.802720][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1178.802720][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1178.802720][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1178.802720][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1178.802720][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1178.802720][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1178.802720][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1178.802720][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1178.802720][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1178.802720][   T72]      vfs_write+0x9e5/0x10a0
[ 1178.802720][   T72]      ksys_write+0xf5/0x1e0
[ 1178.802720][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.802720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.802720][   T72] 
[ 1178.804575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1178.804575][   T72]      netdev_get_by_index+0x5e/0x80
[ 1178.804575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1178.804575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1178.804575][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1178.804575][   T72]      ipv6_add_addr+0x411/0x2000
[ 1178.804575][   T72]      inet6_addr_add+0x30e/0xa40
[ 1178.804575][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1178.804575][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.804575][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.804575][   T72]      netlink_unicast+0x449/0x710
[ 1178.804575][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.804575][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.804575][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.804575][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.804575][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.804575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.804575][   T72] 
[ 1178.806606][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1178.806606][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1178.806606][   T72]      ipv6_find_idev+0x102/0x170
[ 1178.806606][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1178.806606][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.806606][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.806606][   T72]      netlink_unicast+0x449/0x710
[ 1178.806606][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.806606][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.806606][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.806606][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.806606][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.806606][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.806606][   T72] 
[ 1178.808189][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1178.808189][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1178.808189][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1178.808189][   T72]      ipv6_find_idev+0x102/0x170
[ 1178.808189][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1178.808189][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1178.808189][   T72]      netlink_rcv_skb+0x130/0x360
[ 1178.808189][   T72]      netlink_unicast+0x449/0x710
[ 1178.808189][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1178.808189][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1178.808189][   T72]      ___sys_sendmsg+0xee/0x170
[ 1178.808189][   T72]      __sys_sendmsg+0xcd/0x170
[ 1178.808189][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.808189][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.808189][   T72] 
[ 1178.809897][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1178.810140][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1178.810140][   T72]      dst_init+0x84/0x4a0
[ 1178.810140][   T72]      dst_alloc+0x97/0x150
[ 1178.810140][   T72]      ip6_dst_alloc+0x23/0x90
[ 1178.810140][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1178.810140][   T72]      ip6_pol_route+0x56f/0x840
[ 1178.810140][   T72]      fib6_rule_lookup+0x227/0x600
[ 1178.810140][   T72]      ip6_route_output_flags+0x251/0x460
[ 1178.810140][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1178.810140][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1178.810140][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1178.810140][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1178.810140][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1178.810140][   T72]      __sys_connect+0x217/0x2a0
[ 1178.810140][   T72]      __x64_sys_connect+0x72/0xb0
[ 1178.810140][   T72]      do_syscall_64+0xc6/0x1e0
[ 1178.810140][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1178.810140][   T72] 
[ 1189.052697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1189.053077][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1189.053077][   T72]      netdev_get_by_index+0x5e/0x80
[ 1189.053077][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1189.053077][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1189.053077][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1189.053077][   T72]      ipv6_add_addr+0x411/0x2000
[ 1189.053077][   T72]      inet6_addr_add+0x30e/0xa40
[ 1189.053077][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1189.053077][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.053077][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.053077][   T72]      netlink_unicast+0x449/0x710
[ 1189.053077][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.053077][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.053077][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.053077][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.053077][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.053077][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.053077][   T72] 
[ 1189.055107][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1189.055107][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1189.055107][   T72]      ipv6_find_idev+0x102/0x170
[ 1189.055107][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1189.055107][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.055107][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.055107][   T72]      netlink_unicast+0x449/0x710
[ 1189.055107][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.055107][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.055107][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.055107][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.055107][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.055107][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.055107][   T72] 
[ 1189.056617][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1189.056617][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1189.056617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1189.056617][   T72]      ipv6_find_idev+0x102/0x170
[ 1189.056617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1189.056617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.056617][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.056617][   T72]      netlink_unicast+0x449/0x710
[ 1189.056617][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.056617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.056617][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.056617][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.056617][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.056617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.056617][   T72] 
[ 1189.058300][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1189.058571][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1189.058571][   T72]      netdev_get_by_index+0x5e/0x80
[ 1189.058571][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1189.058571][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1189.058571][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1189.058571][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1189.058571][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1189.058571][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1189.058571][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1189.058571][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1189.058571][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1189.058571][   T72]      vfs_write+0x9e5/0x10a0
[ 1189.058571][   T72]      ksys_write+0xf5/0x1e0
[ 1189.058571][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.058571][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.058571][   T72] 
[ 1189.060429][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1189.060429][   T72]      netdev_get_by_index+0x5e/0x80
[ 1189.060429][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1189.060429][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1189.060429][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1189.060429][   T72]      ipv6_add_addr+0x411/0x2000
[ 1189.060429][   T72]      inet6_addr_add+0x30e/0xa40
[ 1189.060429][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1189.060429][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.060429][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.060429][   T72]      netlink_unicast+0x449/0x710
[ 1189.060429][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.060429][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.060429][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.060429][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.060429][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.060429][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.060429][   T72] 
[ 1189.062432][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1189.062432][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1189.062432][   T72]      ipv6_find_idev+0x102/0x170
[ 1189.062432][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1189.062432][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.062432][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.062432][   T72]      netlink_unicast+0x449/0x710
[ 1189.062432][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.062432][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.062432][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.062432][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.062432][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.062432][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.062432][   T72] 
[ 1189.064100][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1189.064100][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1189.064100][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1189.064100][   T72]      ipv6_find_idev+0x102/0x170
[ 1189.064100][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1189.064100][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1189.064100][   T72]      netlink_rcv_skb+0x130/0x360
[ 1189.064100][   T72]      netlink_unicast+0x449/0x710
[ 1189.064100][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1189.064100][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1189.064100][   T72]      ___sys_sendmsg+0xee/0x170
[ 1189.064100][   T72]      __sys_sendmsg+0xcd/0x170
[ 1189.064100][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.064100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.064100][   T72] 
[ 1189.065762][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1189.065999][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1189.065999][   T72]      dst_init+0x84/0x4a0
[ 1189.065999][   T72]      dst_alloc+0x97/0x150
[ 1189.065999][   T72]      ip6_dst_alloc+0x23/0x90
[ 1189.065999][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1189.065999][   T72]      ip6_pol_route+0x56f/0x840
[ 1189.065999][   T72]      fib6_rule_lookup+0x227/0x600
[ 1189.065999][   T72]      ip6_route_output_flags+0x251/0x460
[ 1189.065999][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1189.065999][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1189.065999][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1189.065999][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1189.065999][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1189.065999][   T72]      __sys_connect+0x217/0x2a0
[ 1189.065999][   T72]      __x64_sys_connect+0x72/0xb0
[ 1189.065999][   T72]      do_syscall_64+0xc6/0x1e0
[ 1189.065999][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1189.065999][   T72] 
[ 1199.308744][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1199.309194][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1199.309194][   T72]      netdev_get_by_index+0x5e/0x80
[ 1199.309194][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1199.309194][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1199.309194][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1199.309194][   T72]      ipv6_add_addr+0x411/0x2000
[ 1199.309194][   T72]      inet6_addr_add+0x30e/0xa40
[ 1199.309194][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1199.309194][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.309194][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.309194][   T72]      netlink_unicast+0x449/0x710
[ 1199.309194][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.309194][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.309194][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.309194][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.309194][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.309194][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.309194][   T72] 
[ 1199.311163][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1199.311163][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1199.311163][   T72]      ipv6_find_idev+0x102/0x170
[ 1199.311163][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1199.311163][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.311163][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.311163][   T72]      netlink_unicast+0x449/0x710
[ 1199.311163][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.311163][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.311163][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.311163][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.311163][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.311163][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.311163][   T72] 
[ 1199.312671][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1199.312671][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1199.312671][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1199.312671][   T72]      ipv6_find_idev+0x102/0x170
[ 1199.312671][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1199.312671][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.312671][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.312671][   T72]      netlink_unicast+0x449/0x710
[ 1199.312671][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.312671][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.312671][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.312671][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.312671][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.312671][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.312671][   T72] 
[ 1199.314325][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1199.314605][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1199.314605][   T72]      netdev_get_by_index+0x5e/0x80
[ 1199.314605][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1199.314605][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1199.314605][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1199.314605][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1199.314605][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1199.314605][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1199.314605][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1199.314605][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1199.314605][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1199.314605][   T72]      vfs_write+0x9e5/0x10a0
[ 1199.314605][   T72]      ksys_write+0xf5/0x1e0
[ 1199.314605][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.314605][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.314605][   T72] 
[ 1199.316414][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1199.316414][   T72]      netdev_get_by_index+0x5e/0x80
[ 1199.316414][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1199.316414][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1199.316414][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1199.316414][   T72]      ipv6_add_addr+0x411/0x2000
[ 1199.316414][   T72]      inet6_addr_add+0x30e/0xa40
[ 1199.316414][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1199.316414][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.316414][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.316414][   T72]      netlink_unicast+0x449/0x710
[ 1199.316414][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.316414][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.316414][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.316414][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.316414][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.316414][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.316414][   T72] 
[ 1199.318363][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1199.318363][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1199.318363][   T72]      ipv6_find_idev+0x102/0x170
[ 1199.318363][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1199.318363][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.318363][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.318363][   T72]      netlink_unicast+0x449/0x710
[ 1199.318363][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.318363][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.318363][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.318363][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.318363][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.318363][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.318363][   T72] 
[ 1199.319885][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1199.319885][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1199.319885][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1199.319885][   T72]      ipv6_find_idev+0x102/0x170
[ 1199.319885][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1199.319885][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1199.319885][   T72]      netlink_rcv_skb+0x130/0x360
[ 1199.319885][   T72]      netlink_unicast+0x449/0x710
[ 1199.319885][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1199.319885][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1199.319885][   T72]      ___sys_sendmsg+0xee/0x170
[ 1199.319885][   T72]      __sys_sendmsg+0xcd/0x170
[ 1199.319885][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.319885][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.319885][   T72] 
[ 1199.321535][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1199.321786][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1199.321786][   T72]      dst_init+0x84/0x4a0
[ 1199.321786][   T72]      dst_alloc+0x97/0x150
[ 1199.321786][   T72]      ip6_dst_alloc+0x23/0x90
[ 1199.321786][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1199.321786][   T72]      ip6_pol_route+0x56f/0x840
[ 1199.321786][   T72]      fib6_rule_lookup+0x227/0x600
[ 1199.321786][   T72]      ip6_route_output_flags+0x251/0x460
[ 1199.321786][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1199.321786][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1199.321786][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1199.321786][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1199.321786][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1199.321786][   T72]      __sys_connect+0x217/0x2a0
[ 1199.321786][   T72]      __x64_sys_connect+0x72/0xb0
[ 1199.321786][   T72]      do_syscall_64+0xc6/0x1e0
[ 1199.321786][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1199.321786][   T72] 
[ 1209.564718][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1209.565153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1209.565153][   T72]      netdev_get_by_index+0x5e/0x80
[ 1209.565153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1209.565153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1209.565153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1209.565153][   T72]      ipv6_add_addr+0x411/0x2000
[ 1209.565153][   T72]      inet6_addr_add+0x30e/0xa40
[ 1209.565153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1209.565153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.565153][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.565153][   T72]      netlink_unicast+0x449/0x710
[ 1209.565153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.565153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.565153][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.565153][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.565153][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.565153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.565153][   T72] 
[ 1209.567133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1209.567133][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1209.567133][   T72]      ipv6_find_idev+0x102/0x170
[ 1209.567133][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1209.567133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.567133][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.567133][   T72]      netlink_unicast+0x449/0x710
[ 1209.567133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.567133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.567133][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.567133][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.567133][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.567133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.567133][   T72] 
[ 1209.568642][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1209.568642][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1209.568642][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1209.568642][   T72]      ipv6_find_idev+0x102/0x170
[ 1209.568642][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1209.568642][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.568642][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.568642][   T72]      netlink_unicast+0x449/0x710
[ 1209.568642][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.568642][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.568642][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.568642][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.568642][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.568642][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.568642][   T72] 
[ 1209.570292][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1209.570556][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1209.570556][   T72]      netdev_get_by_index+0x5e/0x80
[ 1209.570556][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1209.570556][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1209.570556][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1209.570556][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1209.570556][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1209.570556][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1209.570556][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1209.570556][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1209.570556][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1209.570556][   T72]      vfs_write+0x9e5/0x10a0
[ 1209.570556][   T72]      ksys_write+0xf5/0x1e0
[ 1209.570556][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.570556][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.570556][   T72] 
[ 1209.572371][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1209.572371][   T72]      netdev_get_by_index+0x5e/0x80
[ 1209.572371][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1209.572371][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1209.572371][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1209.572371][   T72]      ipv6_add_addr+0x411/0x2000
[ 1209.572371][   T72]      inet6_addr_add+0x30e/0xa40
[ 1209.572371][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1209.572371][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.572371][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.572371][   T72]      netlink_unicast+0x449/0x710
[ 1209.572371][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.572371][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.572371][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.572371][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.572371][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.572371][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.572371][   T72] 
[ 1209.574324][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1209.574324][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1209.574324][   T72]      ipv6_find_idev+0x102/0x170
[ 1209.574324][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1209.574324][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.574324][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.574324][   T72]      netlink_unicast+0x449/0x710
[ 1209.574324][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.574324][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.574324][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.574324][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.574324][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.574324][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.574324][   T72] 
[ 1209.575833][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1209.575833][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1209.575833][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1209.575833][   T72]      ipv6_find_idev+0x102/0x170
[ 1209.575833][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1209.575833][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1209.575833][   T72]      netlink_rcv_skb+0x130/0x360
[ 1209.575833][   T72]      netlink_unicast+0x449/0x710
[ 1209.575833][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1209.575833][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1209.575833][   T72]      ___sys_sendmsg+0xee/0x170
[ 1209.575833][   T72]      __sys_sendmsg+0xcd/0x170
[ 1209.575833][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.575833][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.575833][   T72] 
[ 1209.577497][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1209.577744][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1209.577744][   T72]      dst_init+0x84/0x4a0
[ 1209.577744][   T72]      dst_alloc+0x97/0x150
[ 1209.577744][   T72]      ip6_dst_alloc+0x23/0x90
[ 1209.577744][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1209.577744][   T72]      ip6_pol_route+0x56f/0x840
[ 1209.577744][   T72]      fib6_rule_lookup+0x227/0x600
[ 1209.577744][   T72]      ip6_route_output_flags+0x251/0x460
[ 1209.577744][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1209.577744][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1209.577744][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1209.577744][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1209.577744][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1209.577744][   T72]      __sys_connect+0x217/0x2a0
[ 1209.577744][   T72]      __x64_sys_connect+0x72/0xb0
[ 1209.577744][   T72]      do_syscall_64+0xc6/0x1e0
[ 1209.577744][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1209.577744][   T72] 
[ 1219.836805][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1219.837252][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1219.837252][   T72]      netdev_get_by_index+0x5e/0x80
[ 1219.837252][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1219.837252][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1219.837252][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1219.837252][   T72]      ipv6_add_addr+0x411/0x2000
[ 1219.837252][   T72]      inet6_addr_add+0x30e/0xa40
[ 1219.837252][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1219.837252][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.837252][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.837252][   T72]      netlink_unicast+0x449/0x710
[ 1219.837252][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.837252][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.837252][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.837252][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.837252][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.837252][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.837252][   T72] 
[ 1219.839220][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1219.839220][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1219.839220][   T72]      ipv6_find_idev+0x102/0x170
[ 1219.839220][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1219.839220][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.839220][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.839220][   T72]      netlink_unicast+0x449/0x710
[ 1219.839220][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.839220][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.839220][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.839220][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.839220][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.839220][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.839220][   T72] 
[ 1219.840734][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1219.840734][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1219.840734][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1219.840734][   T72]      ipv6_find_idev+0x102/0x170
[ 1219.840734][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1219.840734][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.840734][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.840734][   T72]      netlink_unicast+0x449/0x710
[ 1219.840734][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.840734][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.840734][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.840734][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.840734][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.840734][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.840734][   T72] 
[ 1219.842411][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1219.842694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1219.842694][   T72]      netdev_get_by_index+0x5e/0x80
[ 1219.842694][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1219.842694][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1219.842694][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1219.842694][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1219.842694][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1219.842694][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1219.842694][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1219.842694][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1219.842694][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1219.842694][   T72]      vfs_write+0x9e5/0x10a0
[ 1219.842694][   T72]      ksys_write+0xf5/0x1e0
[ 1219.842694][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.842694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.842694][   T72] 
[ 1219.844541][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1219.844541][   T72]      netdev_get_by_index+0x5e/0x80
[ 1219.844541][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1219.844541][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1219.844541][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1219.844541][   T72]      ipv6_add_addr+0x411/0x2000
[ 1219.844541][   T72]      inet6_addr_add+0x30e/0xa40
[ 1219.844541][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1219.844541][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.844541][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.844541][   T72]      netlink_unicast+0x449/0x710
[ 1219.844541][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.844541][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.844541][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.844541][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.844541][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.844541][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.844541][   T72] 
[ 1219.846504][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1219.846504][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1219.846504][   T72]      ipv6_find_idev+0x102/0x170
[ 1219.846504][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1219.846504][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.846504][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.846504][   T72]      netlink_unicast+0x449/0x710
[ 1219.846504][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.846504][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.846504][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.846504][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.846504][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.846504][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.846504][   T72] 
[ 1219.848012][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1219.848012][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1219.848012][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1219.848012][   T72]      ipv6_find_idev+0x102/0x170
[ 1219.848012][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1219.848012][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1219.848012][   T72]      netlink_rcv_skb+0x130/0x360
[ 1219.848012][   T72]      netlink_unicast+0x449/0x710
[ 1219.848012][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1219.848012][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1219.848012][   T72]      ___sys_sendmsg+0xee/0x170
[ 1219.848012][   T72]      __sys_sendmsg+0xcd/0x170
[ 1219.848012][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.848012][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.848012][   T72] 
[ 1219.849678][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1219.849919][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1219.849919][   T72]      dst_init+0x84/0x4a0
[ 1219.849919][   T72]      dst_alloc+0x97/0x150
[ 1219.849919][   T72]      ip6_dst_alloc+0x23/0x90
[ 1219.849919][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1219.849919][   T72]      ip6_pol_route+0x56f/0x840
[ 1219.849919][   T72]      fib6_rule_lookup+0x227/0x600
[ 1219.849919][   T72]      ip6_route_output_flags+0x251/0x460
[ 1219.849919][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1219.849919][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1219.849919][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1219.849919][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1219.849919][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1219.849919][   T72]      __sys_connect+0x217/0x2a0
[ 1219.849919][   T72]      __x64_sys_connect+0x72/0xb0
[ 1219.849919][   T72]      do_syscall_64+0xc6/0x1e0
[ 1219.849919][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1219.849919][   T72] 
[ 1229.956696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1229.957068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1229.957068][   T72]      netdev_get_by_index+0x5e/0x80
[ 1229.957068][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1229.957068][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1229.957068][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1229.957068][   T72]      ipv6_add_addr+0x411/0x2000
[ 1229.957068][   T72]      inet6_addr_add+0x30e/0xa40
[ 1229.957068][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1229.957068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.957068][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.957068][   T72]      netlink_unicast+0x449/0x710
[ 1229.957068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.957068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.957068][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.957068][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.957068][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.957068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.957068][   T72] 
[ 1229.959072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1229.959072][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1229.959072][   T72]      ipv6_find_idev+0x102/0x170
[ 1229.959072][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1229.959072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.959072][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.959072][   T72]      netlink_unicast+0x449/0x710
[ 1229.959072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.959072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.959072][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.959072][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.959072][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.959072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.959072][   T72] 
[ 1229.960631][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1229.960631][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1229.960631][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1229.960631][   T72]      ipv6_find_idev+0x102/0x170
[ 1229.960631][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1229.960631][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.960631][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.960631][   T72]      netlink_unicast+0x449/0x710
[ 1229.960631][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.960631][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.960631][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.960631][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.960631][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.960631][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.960631][   T72] 
[ 1229.962291][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1229.962556][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1229.962556][   T72]      netdev_get_by_index+0x5e/0x80
[ 1229.962556][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1229.962556][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1229.962556][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1229.962556][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1229.962556][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1229.962556][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1229.962556][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1229.962556][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1229.962556][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1229.962556][   T72]      vfs_write+0x9e5/0x10a0
[ 1229.962556][   T72]      ksys_write+0xf5/0x1e0
[ 1229.962556][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.962556][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.962556][   T72] 
[ 1229.964408][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1229.964408][   T72]      netdev_get_by_index+0x5e/0x80
[ 1229.964408][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1229.964408][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1229.964408][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1229.964408][   T72]      ipv6_add_addr+0x411/0x2000
[ 1229.964408][   T72]      inet6_addr_add+0x30e/0xa40
[ 1229.964408][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1229.964408][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.964408][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.964408][   T72]      netlink_unicast+0x449/0x710
[ 1229.964408][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.964408][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.964408][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.964408][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.964408][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.964408][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.964408][   T72] 
[ 1229.966389][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1229.966389][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1229.966389][   T72]      ipv6_find_idev+0x102/0x170
[ 1229.966389][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1229.966389][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.966389][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.966389][   T72]      netlink_unicast+0x449/0x710
[ 1229.966389][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.966389][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.966389][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.966389][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.966389][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.966389][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.966389][   T72] 
[ 1229.967891][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1229.967891][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1229.967891][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1229.967891][   T72]      ipv6_find_idev+0x102/0x170
[ 1229.967891][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1229.967891][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1229.967891][   T72]      netlink_rcv_skb+0x130/0x360
[ 1229.967891][   T72]      netlink_unicast+0x449/0x710
[ 1229.967891][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1229.967891][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1229.967891][   T72]      ___sys_sendmsg+0xee/0x170
[ 1229.967891][   T72]      __sys_sendmsg+0xcd/0x170
[ 1229.967891][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.967891][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.967891][   T72] 
[ 1229.969582][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1229.969838][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1229.969838][   T72]      dst_init+0x84/0x4a0
[ 1229.969838][   T72]      dst_alloc+0x97/0x150
[ 1229.969838][   T72]      ip6_dst_alloc+0x23/0x90
[ 1229.969838][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1229.969838][   T72]      ip6_pol_route+0x56f/0x840
[ 1229.969838][   T72]      fib6_rule_lookup+0x227/0x600
[ 1229.969838][   T72]      ip6_route_output_flags+0x251/0x460
[ 1229.969838][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1229.969838][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1229.969838][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1229.969838][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1229.969838][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1229.969838][   T72]      __sys_connect+0x217/0x2a0
[ 1229.969838][   T72]      __x64_sys_connect+0x72/0xb0
[ 1229.969838][   T72]      do_syscall_64+0xc6/0x1e0
[ 1229.969838][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1229.969838][   T72] 
[ 1230.116793][   T42] INFO: task modprobe:1562 blocked for more than 737 seconds.
[ 1230.117086][   T42]       Not tainted 6.8.0-virtme #1
[ 1230.117202][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1230.117399][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1230.117684][   T42] Call Trace:
[ 1230.117779][   T42]  <TASK>
[ 1230.117849][   T42]  __schedule+0x705/0x1ac0
[ 1230.117979][   T42]  ? __pfx___schedule+0x10/0x10
[ 1230.118102][   T42]  ? schedule+0x1a5/0x210
[ 1230.118198][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1230.118326][   T42]  ? mark_lock+0x38/0x3e0
[ 1230.118422][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1230.118548][   T42]  ? schedule+0x1a5/0x210
[ 1230.118662][   T42]  schedule+0xdf/0x210
[ 1230.118757][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1230.118879][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1230.119006][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1230.119159][   T42]  ? kasan_save_stack+0x34/0x50
[ 1230.119285][   T42]  ? kasan_save_stack+0x24/0x50
[ 1230.119408][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1230.119536][   T42]  ? lock_acquire+0x1c1/0x220
[ 1230.119672][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1230.119801][   T42]  down_write+0x1c9/0x200
[ 1230.119896][   T42]  ? __pfx_down_write+0x10/0x10
[ 1230.120020][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1230.120147][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1230.120335][   T42]  register_pernet_subsys+0x1a/0x50
[ 1230.120458][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1230.120645][   T42]  do_one_initcall+0xc8/0x3f0
[ 1230.120769][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1230.120899][   T42]  ? __create_object+0x5e/0xb0
[ 1230.121025][   T42]  ? kasan_unpoison+0x27/0x60
[ 1230.121152][   T42]  do_init_module+0x233/0x740
[ 1230.121282][   T42]  load_module+0x16b5/0x2350
[ 1230.121417][   T42]  ? __pfx_load_module+0x10/0x10
[ 1230.121540][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1230.121681][   T42]  ? kernel_read_file+0x300/0x520
[ 1230.121809][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1230.121940][   T42]  ? init_module_from_file+0xd2/0x130
[ 1230.122061][   T42]  init_module_from_file+0xd2/0x130
[ 1230.122183][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1230.122334][   T42]  ? __lock_release+0x103/0x460
[ 1230.122458][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1230.122601][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1230.122727][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1230.122851][   T42]  idempotent_init_module+0x342/0x620
[ 1230.122977][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1230.123146][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1230.123273][   T42]  do_syscall_64+0xc6/0x1e0
[ 1230.123397][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1230.123550][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1230.123685][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1230.123871][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1230.124054][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1230.124233][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1230.124418][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1230.124610][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1230.124803][   T42]  </TASK>
[ 1230.124899][   T42] 
[ 1230.124899][   T42] Showing all locks held in the system:
[ 1230.125071][   T42] 1 lock held by khungtaskd/42:
[ 1230.125189][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1230.125410][   T42] 3 locks held by kworker/u16:1/72:
[ 1230.125525][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1230.125789][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1230.126004][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1230.126221][   T42] 2 locks held by kworker/u20:3/1240:
[ 1230.126336][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1230.126583][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1230.126867][   T42] 1 lock held by modprobe/1562:
[ 1230.126983][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1230.127229][   T42] 
[ 1230.127289][   T42] =============================================
[ 1230.127289][   T42] 
[ 1240.212717][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1240.213167][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1240.213167][   T72]      netdev_get_by_index+0x5e/0x80
[ 1240.213167][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1240.213167][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1240.213167][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1240.213167][   T72]      ipv6_add_addr+0x411/0x2000
[ 1240.213167][   T72]      inet6_addr_add+0x30e/0xa40
[ 1240.213167][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1240.213167][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.213167][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.213167][   T72]      netlink_unicast+0x449/0x710
[ 1240.213167][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.213167][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.213167][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.213167][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.213167][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.213167][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.213167][   T72] 
[ 1240.215151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1240.215151][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1240.215151][   T72]      ipv6_find_idev+0x102/0x170
[ 1240.215151][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1240.215151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.215151][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.215151][   T72]      netlink_unicast+0x449/0x710
[ 1240.215151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.215151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.215151][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.215151][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.215151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.215151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.215151][   T72] 
[ 1240.216661][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1240.216661][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1240.216661][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1240.216661][   T72]      ipv6_find_idev+0x102/0x170
[ 1240.216661][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1240.216661][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.216661][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.216661][   T72]      netlink_unicast+0x449/0x710
[ 1240.216661][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.216661][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.216661][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.216661][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.216661][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.216661][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.216661][   T72] 
[ 1240.218318][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1240.218579][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1240.218579][   T72]      netdev_get_by_index+0x5e/0x80
[ 1240.218579][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1240.218579][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1240.218579][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1240.218579][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1240.218579][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1240.218579][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1240.218579][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1240.218579][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1240.218579][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1240.218579][   T72]      vfs_write+0x9e5/0x10a0
[ 1240.218579][   T72]      ksys_write+0xf5/0x1e0
[ 1240.218579][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.218579][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.218579][   T72] 
[ 1240.220390][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1240.220390][   T72]      netdev_get_by_index+0x5e/0x80
[ 1240.220390][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1240.220390][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1240.220390][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1240.220390][   T72]      ipv6_add_addr+0x411/0x2000
[ 1240.220390][   T72]      inet6_addr_add+0x30e/0xa40
[ 1240.220390][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1240.220390][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.220390][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.220390][   T72]      netlink_unicast+0x449/0x710
[ 1240.220390][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.220390][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.220390][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.220390][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.220390][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.220390][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.220390][   T72] 
[ 1240.222333][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1240.222333][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1240.222333][   T72]      ipv6_find_idev+0x102/0x170
[ 1240.222333][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1240.222333][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.222333][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.222333][   T72]      netlink_unicast+0x449/0x710
[ 1240.222333][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.222333][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.222333][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.222333][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.222333][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.222333][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.222333][   T72] 
[ 1240.223833][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1240.223833][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1240.223833][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1240.223833][   T72]      ipv6_find_idev+0x102/0x170
[ 1240.223833][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1240.223833][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1240.223833][   T72]      netlink_rcv_skb+0x130/0x360
[ 1240.223833][   T72]      netlink_unicast+0x449/0x710
[ 1240.223833][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1240.223833][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1240.223833][   T72]      ___sys_sendmsg+0xee/0x170
[ 1240.223833][   T72]      __sys_sendmsg+0xcd/0x170
[ 1240.223833][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.223833][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.223833][   T72] 
[ 1240.225479][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1240.225720][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1240.225720][   T72]      dst_init+0x84/0x4a0
[ 1240.225720][   T72]      dst_alloc+0x97/0x150
[ 1240.225720][   T72]      ip6_dst_alloc+0x23/0x90
[ 1240.225720][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1240.225720][   T72]      ip6_pol_route+0x56f/0x840
[ 1240.225720][   T72]      fib6_rule_lookup+0x227/0x600
[ 1240.225720][   T72]      ip6_route_output_flags+0x251/0x460
[ 1240.225720][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1240.225720][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1240.225720][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1240.225720][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1240.225720][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1240.225720][   T72]      __sys_connect+0x217/0x2a0
[ 1240.225720][   T72]      __x64_sys_connect+0x72/0xb0
[ 1240.225720][   T72]      do_syscall_64+0xc6/0x1e0
[ 1240.225720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1240.225720][   T72] 
[ 1250.468732][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1250.469178][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1250.469178][   T72]      netdev_get_by_index+0x5e/0x80
[ 1250.469178][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1250.469178][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1250.469178][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1250.469178][   T72]      ipv6_add_addr+0x411/0x2000
[ 1250.469178][   T72]      inet6_addr_add+0x30e/0xa40
[ 1250.469178][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1250.469178][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.469178][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.469178][   T72]      netlink_unicast+0x449/0x710
[ 1250.469178][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.469178][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.469178][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.469178][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.469178][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.469178][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.469178][   T72] 
[ 1250.471182][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1250.471182][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1250.471182][   T72]      ipv6_find_idev+0x102/0x170
[ 1250.471182][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1250.471182][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.471182][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.471182][   T72]      netlink_unicast+0x449/0x710
[ 1250.471182][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.471182][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.471182][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.471182][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.471182][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.471182][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.471182][   T72] 
[ 1250.472711][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1250.472711][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1250.472711][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1250.472711][   T72]      ipv6_find_idev+0x102/0x170
[ 1250.472711][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1250.472711][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.472711][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.472711][   T72]      netlink_unicast+0x449/0x710
[ 1250.472711][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.472711][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.472711][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.472711][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.472711][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.472711][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.472711][   T72] 
[ 1250.474430][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1250.474713][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1250.474713][   T72]      netdev_get_by_index+0x5e/0x80
[ 1250.474713][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1250.474713][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1250.474713][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1250.474713][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1250.474713][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1250.474713][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1250.474713][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1250.474713][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1250.474713][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1250.474713][   T72]      vfs_write+0x9e5/0x10a0
[ 1250.474713][   T72]      ksys_write+0xf5/0x1e0
[ 1250.474713][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.474713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.474713][   T72] 
[ 1250.476545][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1250.476545][   T72]      netdev_get_by_index+0x5e/0x80
[ 1250.476545][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1250.476545][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1250.476545][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1250.476545][   T72]      ipv6_add_addr+0x411/0x2000
[ 1250.476545][   T72]      inet6_addr_add+0x30e/0xa40
[ 1250.476545][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1250.476545][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.476545][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.476545][   T72]      netlink_unicast+0x449/0x710
[ 1250.476545][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.476545][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.476545][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.476545][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.476545][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.476545][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.476545][   T72] 
[ 1250.478527][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1250.478527][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1250.478527][   T72]      ipv6_find_idev+0x102/0x170
[ 1250.478527][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1250.478527][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.478527][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.478527][   T72]      netlink_unicast+0x449/0x710
[ 1250.478527][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.478527][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.478527][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.478527][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.478527][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.478527][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.478527][   T72] 
[ 1250.480056][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1250.480056][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1250.480056][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1250.480056][   T72]      ipv6_find_idev+0x102/0x170
[ 1250.480056][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1250.480056][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1250.480056][   T72]      netlink_rcv_skb+0x130/0x360
[ 1250.480056][   T72]      netlink_unicast+0x449/0x710
[ 1250.480056][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1250.480056][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1250.480056][   T72]      ___sys_sendmsg+0xee/0x170
[ 1250.480056][   T72]      __sys_sendmsg+0xcd/0x170
[ 1250.480056][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.480056][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.480056][   T72] 
[ 1250.481761][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1250.482006][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1250.482006][   T72]      dst_init+0x84/0x4a0
[ 1250.482006][   T72]      dst_alloc+0x97/0x150
[ 1250.482006][   T72]      ip6_dst_alloc+0x23/0x90
[ 1250.482006][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1250.482006][   T72]      ip6_pol_route+0x56f/0x840
[ 1250.482006][   T72]      fib6_rule_lookup+0x227/0x600
[ 1250.482006][   T72]      ip6_route_output_flags+0x251/0x460
[ 1250.482006][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1250.482006][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1250.482006][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1250.482006][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1250.482006][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1250.482006][   T72]      __sys_connect+0x217/0x2a0
[ 1250.482006][   T72]      __x64_sys_connect+0x72/0xb0
[ 1250.482006][   T72]      do_syscall_64+0xc6/0x1e0
[ 1250.482006][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1250.482006][   T72] 
[ 1260.724701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1260.725160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1260.725160][   T72]      netdev_get_by_index+0x5e/0x80
[ 1260.725160][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1260.725160][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1260.725160][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1260.725160][   T72]      ipv6_add_addr+0x411/0x2000
[ 1260.725160][   T72]      inet6_addr_add+0x30e/0xa40
[ 1260.725160][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1260.725160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.725160][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.725160][   T72]      netlink_unicast+0x449/0x710
[ 1260.725160][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.725160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.725160][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.725160][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.725160][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.725160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.725160][   T72] 
[ 1260.727177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1260.727177][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1260.727177][   T72]      ipv6_find_idev+0x102/0x170
[ 1260.727177][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1260.727177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.727177][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.727177][   T72]      netlink_unicast+0x449/0x710
[ 1260.727177][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.727177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.727177][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.727177][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.727177][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.727177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.727177][   T72] 
[ 1260.728714][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1260.728714][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1260.728714][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1260.728714][   T72]      ipv6_find_idev+0x102/0x170
[ 1260.728714][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1260.728714][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.728714][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.728714][   T72]      netlink_unicast+0x449/0x710
[ 1260.728714][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.728714][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.728714][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.728714][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.728714][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.728714][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.728714][   T72] 
[ 1260.730407][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1260.730693][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1260.730693][   T72]      netdev_get_by_index+0x5e/0x80
[ 1260.730693][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1260.730693][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1260.730693][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1260.730693][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1260.730693][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1260.730693][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1260.730693][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1260.730693][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1260.730693][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1260.730693][   T72]      vfs_write+0x9e5/0x10a0
[ 1260.730693][   T72]      ksys_write+0xf5/0x1e0
[ 1260.730693][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.730693][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.730693][   T72] 
[ 1260.732538][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1260.732538][   T72]      netdev_get_by_index+0x5e/0x80
[ 1260.732538][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1260.732538][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1260.732538][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1260.732538][   T72]      ipv6_add_addr+0x411/0x2000
[ 1260.732538][   T72]      inet6_addr_add+0x30e/0xa40
[ 1260.732538][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1260.732538][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.732538][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.732538][   T72]      netlink_unicast+0x449/0x710
[ 1260.732538][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.732538][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.732538][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.732538][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.732538][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.732538][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.732538][   T72] 
[ 1260.734547][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1260.734547][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1260.734547][   T72]      ipv6_find_idev+0x102/0x170
[ 1260.734547][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1260.734547][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.734547][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.734547][   T72]      netlink_unicast+0x449/0x710
[ 1260.734547][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.734547][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.734547][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.734547][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.734547][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.734547][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.734547][   T72] 
[ 1260.736084][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1260.736084][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1260.736084][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1260.736084][   T72]      ipv6_find_idev+0x102/0x170
[ 1260.736084][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1260.736084][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1260.736084][   T72]      netlink_rcv_skb+0x130/0x360
[ 1260.736084][   T72]      netlink_unicast+0x449/0x710
[ 1260.736084][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1260.736084][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1260.736084][   T72]      ___sys_sendmsg+0xee/0x170
[ 1260.736084][   T72]      __sys_sendmsg+0xcd/0x170
[ 1260.736084][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.736084][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.736084][   T72] 
[ 1260.737768][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1260.738007][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1260.738007][   T72]      dst_init+0x84/0x4a0
[ 1260.738007][   T72]      dst_alloc+0x97/0x150
[ 1260.738007][   T72]      ip6_dst_alloc+0x23/0x90
[ 1260.738007][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1260.738007][   T72]      ip6_pol_route+0x56f/0x840
[ 1260.738007][   T72]      fib6_rule_lookup+0x227/0x600
[ 1260.738007][   T72]      ip6_route_output_flags+0x251/0x460
[ 1260.738007][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1260.738007][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1260.738007][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1260.738007][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1260.738007][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1260.738007][   T72]      __sys_connect+0x217/0x2a0
[ 1260.738007][   T72]      __x64_sys_connect+0x72/0xb0
[ 1260.738007][   T72]      do_syscall_64+0xc6/0x1e0
[ 1260.738007][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1260.738007][   T72] 
[ 1270.980722][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1270.981175][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1270.981175][   T72]      netdev_get_by_index+0x5e/0x80
[ 1270.981175][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1270.981175][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1270.981175][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1270.981175][   T72]      ipv6_add_addr+0x411/0x2000
[ 1270.981175][   T72]      inet6_addr_add+0x30e/0xa40
[ 1270.981175][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1270.981175][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.981175][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.981175][   T72]      netlink_unicast+0x449/0x710
[ 1270.981175][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.981175][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.981175][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.981175][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.981175][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.981175][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.981175][   T72] 
[ 1270.983195][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1270.983195][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1270.983195][   T72]      ipv6_find_idev+0x102/0x170
[ 1270.983195][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1270.983195][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.983195][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.983195][   T72]      netlink_unicast+0x449/0x710
[ 1270.983195][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.983195][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.983195][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.983195][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.983195][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.983195][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.983195][   T72] 
[ 1270.984745][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1270.984745][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1270.984745][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1270.984745][   T72]      ipv6_find_idev+0x102/0x170
[ 1270.984745][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1270.984745][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.984745][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.984745][   T72]      netlink_unicast+0x449/0x710
[ 1270.984745][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.984745][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.984745][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.984745][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.984745][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.984745][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.984745][   T72] 
[ 1270.986443][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1270.986733][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1270.986733][   T72]      netdev_get_by_index+0x5e/0x80
[ 1270.986733][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1270.986733][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1270.986733][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1270.986733][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1270.986733][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1270.986733][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1270.986733][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1270.986733][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1270.986733][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1270.986733][   T72]      vfs_write+0x9e5/0x10a0
[ 1270.986733][   T72]      ksys_write+0xf5/0x1e0
[ 1270.986733][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.986733][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.986733][   T72] 
[ 1270.988570][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1270.988570][   T72]      netdev_get_by_index+0x5e/0x80
[ 1270.988570][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1270.988570][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1270.988570][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1270.988570][   T72]      ipv6_add_addr+0x411/0x2000
[ 1270.988570][   T72]      inet6_addr_add+0x30e/0xa40
[ 1270.988570][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1270.988570][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.988570][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.988570][   T72]      netlink_unicast+0x449/0x710
[ 1270.988570][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.988570][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.988570][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.988570][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.988570][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.988570][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.988570][   T72] 
[ 1270.990549][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1270.990549][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1270.990549][   T72]      ipv6_find_idev+0x102/0x170
[ 1270.990549][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1270.990549][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.990549][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.990549][   T72]      netlink_unicast+0x449/0x710
[ 1270.990549][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.990549][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.990549][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.990549][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.990549][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.990549][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.990549][   T72] 
[ 1270.992074][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1270.992074][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1270.992074][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1270.992074][   T72]      ipv6_find_idev+0x102/0x170
[ 1270.992074][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1270.992074][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1270.992074][   T72]      netlink_rcv_skb+0x130/0x360
[ 1270.992074][   T72]      netlink_unicast+0x449/0x710
[ 1270.992074][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1270.992074][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1270.992074][   T72]      ___sys_sendmsg+0xee/0x170
[ 1270.992074][   T72]      __sys_sendmsg+0xcd/0x170
[ 1270.992074][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.992074][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.992074][   T72] 
[ 1270.993751][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1270.994000][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1270.994000][   T72]      dst_init+0x84/0x4a0
[ 1270.994000][   T72]      dst_alloc+0x97/0x150
[ 1270.994000][   T72]      ip6_dst_alloc+0x23/0x90
[ 1270.994000][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1270.994000][   T72]      ip6_pol_route+0x56f/0x840
[ 1270.994000][   T72]      fib6_rule_lookup+0x227/0x600
[ 1270.994000][   T72]      ip6_route_output_flags+0x251/0x460
[ 1270.994000][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1270.994000][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1270.994000][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1270.994000][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1270.994000][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1270.994000][   T72]      __sys_connect+0x217/0x2a0
[ 1270.994000][   T72]      __x64_sys_connect+0x72/0xb0
[ 1270.994000][   T72]      do_syscall_64+0xc6/0x1e0
[ 1270.994000][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1270.994000][   T72] 
[ 1281.236705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1281.237172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1281.237172][   T72]      netdev_get_by_index+0x5e/0x80
[ 1281.237172][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1281.237172][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1281.237172][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1281.237172][   T72]      ipv6_add_addr+0x411/0x2000
[ 1281.237172][   T72]      inet6_addr_add+0x30e/0xa40
[ 1281.237172][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1281.237172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.237172][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.237172][   T72]      netlink_unicast+0x449/0x710
[ 1281.237172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.237172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.237172][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.237172][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.237172][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.237172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.237172][   T72] 
[ 1281.239173][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1281.239173][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1281.239173][   T72]      ipv6_find_idev+0x102/0x170
[ 1281.239173][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1281.239173][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.239173][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.239173][   T72]      netlink_unicast+0x449/0x710
[ 1281.239173][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.239173][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.239173][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.239173][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.239173][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.239173][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.239173][   T72] 
[ 1281.240705][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1281.240705][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1281.240705][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1281.240705][   T72]      ipv6_find_idev+0x102/0x170
[ 1281.240705][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1281.240705][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.240705][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.240705][   T72]      netlink_unicast+0x449/0x710
[ 1281.240705][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.240705][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.240705][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.240705][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.240705][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.240705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.240705][   T72] 
[ 1281.242395][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1281.242679][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1281.242679][   T72]      netdev_get_by_index+0x5e/0x80
[ 1281.242679][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1281.242679][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1281.242679][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1281.242679][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1281.242679][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1281.242679][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1281.242679][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1281.242679][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1281.242679][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1281.242679][   T72]      vfs_write+0x9e5/0x10a0
[ 1281.242679][   T72]      ksys_write+0xf5/0x1e0
[ 1281.242679][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.242679][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.242679][   T72] 
[ 1281.244533][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1281.244533][   T72]      netdev_get_by_index+0x5e/0x80
[ 1281.244533][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1281.244533][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1281.244533][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1281.244533][   T72]      ipv6_add_addr+0x411/0x2000
[ 1281.244533][   T72]      inet6_addr_add+0x30e/0xa40
[ 1281.244533][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1281.244533][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.244533][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.244533][   T72]      netlink_unicast+0x449/0x710
[ 1281.244533][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.244533][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.244533][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.244533][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.244533][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.244533][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.244533][   T72] 
[ 1281.246509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1281.246509][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1281.246509][   T72]      ipv6_find_idev+0x102/0x170
[ 1281.246509][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1281.246509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.246509][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.246509][   T72]      netlink_unicast+0x449/0x710
[ 1281.246509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.246509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.246509][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.246509][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.246509][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.246509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.246509][   T72] 
[ 1281.248035][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1281.248035][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1281.248035][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1281.248035][   T72]      ipv6_find_idev+0x102/0x170
[ 1281.248035][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1281.248035][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1281.248035][   T72]      netlink_rcv_skb+0x130/0x360
[ 1281.248035][   T72]      netlink_unicast+0x449/0x710
[ 1281.248035][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1281.248035][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1281.248035][   T72]      ___sys_sendmsg+0xee/0x170
[ 1281.248035][   T72]      __sys_sendmsg+0xcd/0x170
[ 1281.248035][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.248035][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.248035][   T72] 
[ 1281.249712][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1281.249955][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1281.249955][   T72]      dst_init+0x84/0x4a0
[ 1281.249955][   T72]      dst_alloc+0x97/0x150
[ 1281.249955][   T72]      ip6_dst_alloc+0x23/0x90
[ 1281.249955][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1281.249955][   T72]      ip6_pol_route+0x56f/0x840
[ 1281.249955][   T72]      fib6_rule_lookup+0x227/0x600
[ 1281.249955][   T72]      ip6_route_output_flags+0x251/0x460
[ 1281.249955][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1281.249955][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1281.249955][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1281.249955][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1281.249955][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1281.249955][   T72]      __sys_connect+0x217/0x2a0
[ 1281.249955][   T72]      __x64_sys_connect+0x72/0xb0
[ 1281.249955][   T72]      do_syscall_64+0xc6/0x1e0
[ 1281.249955][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1281.249955][   T72] 
[ 1291.436697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1291.437148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1291.437148][   T72]      netdev_get_by_index+0x5e/0x80
[ 1291.437148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1291.437148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1291.437148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1291.437148][   T72]      ipv6_add_addr+0x411/0x2000
[ 1291.437148][   T72]      inet6_addr_add+0x30e/0xa40
[ 1291.437148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1291.437148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.437148][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.437148][   T72]      netlink_unicast+0x449/0x710
[ 1291.437148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.437148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.437148][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.437148][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.437148][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.437148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.437148][   T72] 
[ 1291.439166][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1291.439166][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1291.439166][   T72]      ipv6_find_idev+0x102/0x170
[ 1291.439166][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1291.439166][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.439166][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.439166][   T72]      netlink_unicast+0x449/0x710
[ 1291.439166][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.439166][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.439166][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.439166][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.439166][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.439166][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.439166][   T72] 
[ 1291.440704][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1291.440704][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1291.440704][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1291.440704][   T72]      ipv6_find_idev+0x102/0x170
[ 1291.440704][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1291.440704][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.440704][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.440704][   T72]      netlink_unicast+0x449/0x710
[ 1291.440704][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.440704][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.440704][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.440704][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.440704][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.440704][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.440704][   T72] 
[ 1291.442390][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1291.442678][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1291.442678][   T72]      netdev_get_by_index+0x5e/0x80
[ 1291.442678][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1291.442678][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1291.442678][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1291.442678][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1291.442678][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1291.442678][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1291.442678][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1291.442678][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1291.442678][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1291.442678][   T72]      vfs_write+0x9e5/0x10a0
[ 1291.442678][   T72]      ksys_write+0xf5/0x1e0
[ 1291.442678][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.442678][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.442678][   T72] 
[ 1291.444529][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1291.444529][   T72]      netdev_get_by_index+0x5e/0x80
[ 1291.444529][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1291.444529][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1291.444529][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1291.444529][   T72]      ipv6_add_addr+0x411/0x2000
[ 1291.444529][   T72]      inet6_addr_add+0x30e/0xa40
[ 1291.444529][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1291.444529][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.444529][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.444529][   T72]      netlink_unicast+0x449/0x710
[ 1291.444529][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.444529][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.444529][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.444529][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.444529][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.444529][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.444529][   T72] 
[ 1291.446517][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1291.446517][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1291.446517][   T72]      ipv6_find_idev+0x102/0x170
[ 1291.446517][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1291.446517][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.446517][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.446517][   T72]      netlink_unicast+0x449/0x710
[ 1291.446517][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.446517][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.446517][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.446517][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.446517][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.446517][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.446517][   T72] 
[ 1291.448052][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1291.448052][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1291.448052][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1291.448052][   T72]      ipv6_find_idev+0x102/0x170
[ 1291.448052][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1291.448052][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1291.448052][   T72]      netlink_rcv_skb+0x130/0x360
[ 1291.448052][   T72]      netlink_unicast+0x449/0x710
[ 1291.448052][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1291.448052][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1291.448052][   T72]      ___sys_sendmsg+0xee/0x170
[ 1291.448052][   T72]      __sys_sendmsg+0xcd/0x170
[ 1291.448052][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.448052][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.448052][   T72] 
[ 1291.449731][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1291.449981][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1291.449981][   T72]      dst_init+0x84/0x4a0
[ 1291.449981][   T72]      dst_alloc+0x97/0x150
[ 1291.449981][   T72]      ip6_dst_alloc+0x23/0x90
[ 1291.449981][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1291.449981][   T72]      ip6_pol_route+0x56f/0x840
[ 1291.449981][   T72]      fib6_rule_lookup+0x227/0x600
[ 1291.449981][   T72]      ip6_route_output_flags+0x251/0x460
[ 1291.449981][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1291.449981][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1291.449981][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1291.449981][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1291.449981][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1291.449981][   T72]      __sys_connect+0x217/0x2a0
[ 1291.449981][   T72]      __x64_sys_connect+0x72/0xb0
[ 1291.449981][   T72]      do_syscall_64+0xc6/0x1e0
[ 1291.449981][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1291.449981][   T72] 
[ 1301.604652][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1301.605106][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1301.605106][   T72]      netdev_get_by_index+0x5e/0x80
[ 1301.605106][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1301.605106][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1301.605106][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1301.605106][   T72]      ipv6_add_addr+0x411/0x2000
[ 1301.605106][   T72]      inet6_addr_add+0x30e/0xa40
[ 1301.605106][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1301.605106][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.605106][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.605106][   T72]      netlink_unicast+0x449/0x710
[ 1301.605106][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.605106][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.605106][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.605106][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.605106][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.605106][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.605106][   T72] 
[ 1301.607089][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1301.607089][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1301.607089][   T72]      ipv6_find_idev+0x102/0x170
[ 1301.607089][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1301.607089][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.607089][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.607089][   T72]      netlink_unicast+0x449/0x710
[ 1301.607089][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.607089][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.607089][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.607089][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.607089][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.607089][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.607089][   T72] 
[ 1301.608609][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1301.608609][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1301.608609][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1301.608609][   T72]      ipv6_find_idev+0x102/0x170
[ 1301.608609][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1301.608609][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.608609][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.608609][   T72]      netlink_unicast+0x449/0x710
[ 1301.608609][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.608609][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.608609][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.608609][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.608609][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.608609][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.608609][   T72] 
[ 1301.610280][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1301.610546][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1301.610546][   T72]      netdev_get_by_index+0x5e/0x80
[ 1301.610546][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1301.610546][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1301.610546][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1301.610546][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1301.610546][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1301.610546][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1301.610546][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1301.610546][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1301.610546][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1301.610546][   T72]      vfs_write+0x9e5/0x10a0
[ 1301.610546][   T72]      ksys_write+0xf5/0x1e0
[ 1301.610546][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.610546][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.610546][   T72] 
[ 1301.612379][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1301.612379][   T72]      netdev_get_by_index+0x5e/0x80
[ 1301.612379][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1301.612379][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1301.612379][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1301.612379][   T72]      ipv6_add_addr+0x411/0x2000
[ 1301.612379][   T72]      inet6_addr_add+0x30e/0xa40
[ 1301.612379][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1301.612379][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.612379][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.612379][   T72]      netlink_unicast+0x449/0x710
[ 1301.612379][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.612379][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.612379][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.612379][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.612379][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.612379][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.612379][   T72] 
[ 1301.614357][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1301.614357][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1301.614357][   T72]      ipv6_find_idev+0x102/0x170
[ 1301.614357][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1301.614357][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.614357][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.614357][   T72]      netlink_unicast+0x449/0x710
[ 1301.614357][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.614357][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.614357][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.614357][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.614357][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.614357][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.614357][   T72] 
[ 1301.615873][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1301.615873][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1301.615873][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1301.615873][   T72]      ipv6_find_idev+0x102/0x170
[ 1301.615873][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1301.615873][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1301.615873][   T72]      netlink_rcv_skb+0x130/0x360
[ 1301.615873][   T72]      netlink_unicast+0x449/0x710
[ 1301.615873][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1301.615873][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1301.615873][   T72]      ___sys_sendmsg+0xee/0x170
[ 1301.615873][   T72]      __sys_sendmsg+0xcd/0x170
[ 1301.615873][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.615873][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.615873][   T72] 
[ 1301.617541][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1301.617806][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1301.617806][   T72]      dst_init+0x84/0x4a0
[ 1301.617806][   T72]      dst_alloc+0x97/0x150
[ 1301.617806][   T72]      ip6_dst_alloc+0x23/0x90
[ 1301.617806][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1301.617806][   T72]      ip6_pol_route+0x56f/0x840
[ 1301.617806][   T72]      fib6_rule_lookup+0x227/0x600
[ 1301.617806][   T72]      ip6_route_output_flags+0x251/0x460
[ 1301.617806][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1301.617806][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1301.617806][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1301.617806][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1301.617806][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1301.617806][   T72]      __sys_connect+0x217/0x2a0
[ 1301.617806][   T72]      __x64_sys_connect+0x72/0xb0
[ 1301.617806][   T72]      do_syscall_64+0xc6/0x1e0
[ 1301.617806][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1301.617806][   T72] 
[ 1311.868695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1311.869137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1311.869137][   T72]      netdev_get_by_index+0x5e/0x80
[ 1311.869137][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1311.869137][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1311.869137][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1311.869137][   T72]      ipv6_add_addr+0x411/0x2000
[ 1311.869137][   T72]      inet6_addr_add+0x30e/0xa40
[ 1311.869137][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1311.869137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.869137][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.869137][   T72]      netlink_unicast+0x449/0x710
[ 1311.869137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.869137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.869137][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.869137][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.869137][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.869137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.869137][   T72] 
[ 1311.871107][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1311.871107][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1311.871107][   T72]      ipv6_find_idev+0x102/0x170
[ 1311.871107][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1311.871107][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.871107][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.871107][   T72]      netlink_unicast+0x449/0x710
[ 1311.871107][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.871107][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.871107][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.871107][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.871107][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.871107][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.871107][   T72] 
[ 1311.872612][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1311.872612][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1311.872612][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1311.872612][   T72]      ipv6_find_idev+0x102/0x170
[ 1311.872612][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1311.872612][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.872612][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.872612][   T72]      netlink_unicast+0x449/0x710
[ 1311.872612][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.872612][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.872612][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.872612][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.872612][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.872612][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.872612][   T72] 
[ 1311.874277][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1311.874544][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1311.874544][   T72]      netdev_get_by_index+0x5e/0x80
[ 1311.874544][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1311.874544][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1311.874544][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1311.874544][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1311.874544][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1311.874544][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1311.874544][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1311.874544][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1311.874544][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1311.874544][   T72]      vfs_write+0x9e5/0x10a0
[ 1311.874544][   T72]      ksys_write+0xf5/0x1e0
[ 1311.874544][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.874544][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.874544][   T72] 
[ 1311.876355][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1311.876355][   T72]      netdev_get_by_index+0x5e/0x80
[ 1311.876355][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1311.876355][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1311.876355][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1311.876355][   T72]      ipv6_add_addr+0x411/0x2000
[ 1311.876355][   T72]      inet6_addr_add+0x30e/0xa40
[ 1311.876355][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1311.876355][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.876355][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.876355][   T72]      netlink_unicast+0x449/0x710
[ 1311.876355][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.876355][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.876355][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.876355][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.876355][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.876355][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.876355][   T72] 
[ 1311.878309][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1311.878309][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1311.878309][   T72]      ipv6_find_idev+0x102/0x170
[ 1311.878309][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1311.878309][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.878309][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.878309][   T72]      netlink_unicast+0x449/0x710
[ 1311.878309][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.878309][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.878309][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.878309][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.878309][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.878309][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.878309][   T72] 
[ 1311.879813][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1311.879813][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1311.879813][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1311.879813][   T72]      ipv6_find_idev+0x102/0x170
[ 1311.879813][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1311.879813][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1311.879813][   T72]      netlink_rcv_skb+0x130/0x360
[ 1311.879813][   T72]      netlink_unicast+0x449/0x710
[ 1311.879813][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1311.879813][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1311.879813][   T72]      ___sys_sendmsg+0xee/0x170
[ 1311.879813][   T72]      __sys_sendmsg+0xcd/0x170
[ 1311.879813][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.879813][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.879813][   T72] 
[ 1311.881464][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1311.881708][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1311.881708][   T72]      dst_init+0x84/0x4a0
[ 1311.881708][   T72]      dst_alloc+0x97/0x150
[ 1311.881708][   T72]      ip6_dst_alloc+0x23/0x90
[ 1311.881708][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1311.881708][   T72]      ip6_pol_route+0x56f/0x840
[ 1311.881708][   T72]      fib6_rule_lookup+0x227/0x600
[ 1311.881708][   T72]      ip6_route_output_flags+0x251/0x460
[ 1311.881708][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1311.881708][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1311.881708][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1311.881708][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1311.881708][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1311.881708][   T72]      __sys_connect+0x217/0x2a0
[ 1311.881708][   T72]      __x64_sys_connect+0x72/0xb0
[ 1311.881708][   T72]      do_syscall_64+0xc6/0x1e0
[ 1311.881708][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1311.881708][   T72] 
[ 1322.132712][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1322.133147][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1322.133147][   T72]      netdev_get_by_index+0x5e/0x80
[ 1322.133147][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1322.133147][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1322.133147][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1322.133147][   T72]      ipv6_add_addr+0x411/0x2000
[ 1322.133147][   T72]      inet6_addr_add+0x30e/0xa40
[ 1322.133147][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1322.133147][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.133147][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.133147][   T72]      netlink_unicast+0x449/0x710
[ 1322.133147][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.133147][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.133147][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.133147][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.133147][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.133147][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.133147][   T72] 
[ 1322.135143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1322.135143][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1322.135143][   T72]      ipv6_find_idev+0x102/0x170
[ 1322.135143][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1322.135143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.135143][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.135143][   T72]      netlink_unicast+0x449/0x710
[ 1322.135143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.135143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.135143][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.135143][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.135143][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.135143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.135143][   T72] 
[ 1322.136652][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1322.136652][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1322.136652][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1322.136652][   T72]      ipv6_find_idev+0x102/0x170
[ 1322.136652][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1322.136652][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.136652][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.136652][   T72]      netlink_unicast+0x449/0x710
[ 1322.136652][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.136652][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.136652][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.136652][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.136652][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.136652][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.136652][   T72] 
[ 1322.138405][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1322.138688][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1322.138688][   T72]      netdev_get_by_index+0x5e/0x80
[ 1322.138688][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1322.138688][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1322.138688][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1322.138688][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1322.138688][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1322.138688][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1322.138688][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1322.138688][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1322.138688][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1322.138688][   T72]      vfs_write+0x9e5/0x10a0
[ 1322.138688][   T72]      ksys_write+0xf5/0x1e0
[ 1322.138688][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.138688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.138688][   T72] 
[ 1322.140510][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1322.140510][   T72]      netdev_get_by_index+0x5e/0x80
[ 1322.140510][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1322.140510][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1322.140510][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1322.140510][   T72]      ipv6_add_addr+0x411/0x2000
[ 1322.140510][   T72]      inet6_addr_add+0x30e/0xa40
[ 1322.140510][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1322.140510][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.140510][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.140510][   T72]      netlink_unicast+0x449/0x710
[ 1322.140510][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.140510][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.140510][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.140510][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.140510][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.140510][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.140510][   T72] 
[ 1322.142489][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1322.142489][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1322.142489][   T72]      ipv6_find_idev+0x102/0x170
[ 1322.142489][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1322.142489][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.142489][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.142489][   T72]      netlink_unicast+0x449/0x710
[ 1322.142489][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.142489][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.142489][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.142489][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.142489][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.142489][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.142489][   T72] 
[ 1322.144022][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1322.144022][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1322.144022][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1322.144022][   T72]      ipv6_find_idev+0x102/0x170
[ 1322.144022][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1322.144022][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1322.144022][   T72]      netlink_rcv_skb+0x130/0x360
[ 1322.144022][   T72]      netlink_unicast+0x449/0x710
[ 1322.144022][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1322.144022][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1322.144022][   T72]      ___sys_sendmsg+0xee/0x170
[ 1322.144022][   T72]      __sys_sendmsg+0xcd/0x170
[ 1322.144022][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.144022][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.144022][   T72] 
[ 1322.145692][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1322.145932][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1322.145932][   T72]      dst_init+0x84/0x4a0
[ 1322.145932][   T72]      dst_alloc+0x97/0x150
[ 1322.145932][   T72]      ip6_dst_alloc+0x23/0x90
[ 1322.145932][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1322.145932][   T72]      ip6_pol_route+0x56f/0x840
[ 1322.145932][   T72]      fib6_rule_lookup+0x227/0x600
[ 1322.145932][   T72]      ip6_route_output_flags+0x251/0x460
[ 1322.145932][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1322.145932][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1322.145932][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1322.145932][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1322.145932][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1322.145932][   T72]      __sys_connect+0x217/0x2a0
[ 1322.145932][   T72]      __x64_sys_connect+0x72/0xb0
[ 1322.145932][   T72]      do_syscall_64+0xc6/0x1e0
[ 1322.145932][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1322.145932][   T72] 
[ 1332.396705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1332.397089][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1332.397089][   T72]      netdev_get_by_index+0x5e/0x80
[ 1332.397089][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1332.397089][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1332.397089][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1332.397089][   T72]      ipv6_add_addr+0x411/0x2000
[ 1332.397089][   T72]      inet6_addr_add+0x30e/0xa40
[ 1332.397089][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1332.397089][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.397089][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.397089][   T72]      netlink_unicast+0x449/0x710
[ 1332.397089][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.397089][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.397089][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.397089][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.397089][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.397089][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.397089][   T72] 
[ 1332.399066][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1332.399066][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1332.399066][   T72]      ipv6_find_idev+0x102/0x170
[ 1332.399066][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1332.399066][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.399066][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.399066][   T72]      netlink_unicast+0x449/0x710
[ 1332.399066][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.399066][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.399066][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.399066][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.399066][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.399066][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.399066][   T72] 
[ 1332.400583][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1332.400583][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1332.400583][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1332.400583][   T72]      ipv6_find_idev+0x102/0x170
[ 1332.400583][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1332.400583][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.400583][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.400583][   T72]      netlink_unicast+0x449/0x710
[ 1332.400583][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.400583][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.400583][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.400583][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.400583][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.400583][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.400583][   T72] 
[ 1332.402239][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1332.402512][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1332.402512][   T72]      netdev_get_by_index+0x5e/0x80
[ 1332.402512][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1332.402512][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1332.402512][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1332.402512][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1332.402512][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1332.402512][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1332.402512][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1332.402512][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1332.402512][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1332.402512][   T72]      vfs_write+0x9e5/0x10a0
[ 1332.402512][   T72]      ksys_write+0xf5/0x1e0
[ 1332.402512][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.402512][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.402512][   T72] 
[ 1332.404342][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1332.404342][   T72]      netdev_get_by_index+0x5e/0x80
[ 1332.404342][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1332.404342][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1332.404342][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1332.404342][   T72]      ipv6_add_addr+0x411/0x2000
[ 1332.404342][   T72]      inet6_addr_add+0x30e/0xa40
[ 1332.404342][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1332.404342][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.404342][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.404342][   T72]      netlink_unicast+0x449/0x710
[ 1332.404342][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.404342][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.404342][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.404342][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.404342][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.404342][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.404342][   T72] 
[ 1332.406294][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1332.406294][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1332.406294][   T72]      ipv6_find_idev+0x102/0x170
[ 1332.406294][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1332.406294][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.406294][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.406294][   T72]      netlink_unicast+0x449/0x710
[ 1332.406294][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.406294][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.406294][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.406294][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.406294][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.406294][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.406294][   T72] 
[ 1332.407803][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1332.407803][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1332.407803][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1332.407803][   T72]      ipv6_find_idev+0x102/0x170
[ 1332.407803][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1332.407803][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1332.407803][   T72]      netlink_rcv_skb+0x130/0x360
[ 1332.407803][   T72]      netlink_unicast+0x449/0x710
[ 1332.407803][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1332.407803][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1332.407803][   T72]      ___sys_sendmsg+0xee/0x170
[ 1332.407803][   T72]      __sys_sendmsg+0xcd/0x170
[ 1332.407803][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.407803][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.407803][   T72] 
[ 1332.409442][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1332.409687][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1332.409687][   T72]      dst_init+0x84/0x4a0
[ 1332.409687][   T72]      dst_alloc+0x97/0x150
[ 1332.409687][   T72]      ip6_dst_alloc+0x23/0x90
[ 1332.409687][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1332.409687][   T72]      ip6_pol_route+0x56f/0x840
[ 1332.409687][   T72]      fib6_rule_lookup+0x227/0x600
[ 1332.409687][   T72]      ip6_route_output_flags+0x251/0x460
[ 1332.409687][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1332.409687][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1332.409687][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1332.409687][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1332.409687][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1332.409687][   T72]      __sys_connect+0x217/0x2a0
[ 1332.409687][   T72]      __x64_sys_connect+0x72/0xb0
[ 1332.409687][   T72]      do_syscall_64+0xc6/0x1e0
[ 1332.409687][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1332.409687][   T72] 
[ 1342.412717][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1342.413177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1342.413177][   T72]      netdev_get_by_index+0x5e/0x80
[ 1342.413177][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1342.413177][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1342.413177][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1342.413177][   T72]      ipv6_add_addr+0x411/0x2000
[ 1342.413177][   T72]      inet6_addr_add+0x30e/0xa40
[ 1342.413177][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1342.413177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.413177][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.413177][   T72]      netlink_unicast+0x449/0x710
[ 1342.413177][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.413177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.413177][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.413177][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.413177][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.413177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.413177][   T72] 
[ 1342.415167][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1342.415167][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1342.415167][   T72]      ipv6_find_idev+0x102/0x170
[ 1342.415167][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1342.415167][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.415167][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.415167][   T72]      netlink_unicast+0x449/0x710
[ 1342.415167][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.415167][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.415167][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.415167][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.415167][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.415167][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.415167][   T72] 
[ 1342.416681][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1342.416681][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1342.416681][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1342.416681][   T72]      ipv6_find_idev+0x102/0x170
[ 1342.416681][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1342.416681][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.416681][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.416681][   T72]      netlink_unicast+0x449/0x710
[ 1342.416681][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.416681][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.416681][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.416681][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.416681][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.416681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.416681][   T72] 
[ 1342.418337][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1342.418601][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1342.418601][   T72]      netdev_get_by_index+0x5e/0x80
[ 1342.418601][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1342.418601][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1342.418601][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1342.418601][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1342.418601][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1342.418601][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1342.418601][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1342.418601][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1342.418601][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1342.418601][   T72]      vfs_write+0x9e5/0x10a0
[ 1342.418601][   T72]      ksys_write+0xf5/0x1e0
[ 1342.418601][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.418601][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.418601][   T72] 
[ 1342.420413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1342.420413][   T72]      netdev_get_by_index+0x5e/0x80
[ 1342.420413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1342.420413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1342.420413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1342.420413][   T72]      ipv6_add_addr+0x411/0x2000
[ 1342.420413][   T72]      inet6_addr_add+0x30e/0xa40
[ 1342.420413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1342.420413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.420413][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.420413][   T72]      netlink_unicast+0x449/0x710
[ 1342.420413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.420413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.420413][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.420413][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.420413][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.420413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.420413][   T72] 
[ 1342.422361][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1342.422361][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1342.422361][   T72]      ipv6_find_idev+0x102/0x170
[ 1342.422361][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1342.422361][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.422361][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.422361][   T72]      netlink_unicast+0x449/0x710
[ 1342.422361][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.422361][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.422361][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.422361][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.422361][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.422361][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.422361][   T72] 
[ 1342.423875][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1342.423875][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1342.423875][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1342.423875][   T72]      ipv6_find_idev+0x102/0x170
[ 1342.423875][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1342.423875][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1342.423875][   T72]      netlink_rcv_skb+0x130/0x360
[ 1342.423875][   T72]      netlink_unicast+0x449/0x710
[ 1342.423875][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1342.423875][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1342.423875][   T72]      ___sys_sendmsg+0xee/0x170
[ 1342.423875][   T72]      __sys_sendmsg+0xcd/0x170
[ 1342.423875][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.423875][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.423875][   T72] 
[ 1342.425543][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1342.425795][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1342.425795][   T72]      dst_init+0x84/0x4a0
[ 1342.425795][   T72]      dst_alloc+0x97/0x150
[ 1342.425795][   T72]      ip6_dst_alloc+0x23/0x90
[ 1342.425795][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1342.425795][   T72]      ip6_pol_route+0x56f/0x840
[ 1342.425795][   T72]      fib6_rule_lookup+0x227/0x600
[ 1342.425795][   T72]      ip6_route_output_flags+0x251/0x460
[ 1342.425795][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1342.425795][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1342.425795][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1342.425795][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1342.425795][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1342.425795][   T72]      __sys_connect+0x217/0x2a0
[ 1342.425795][   T72]      __x64_sys_connect+0x72/0xb0
[ 1342.425795][   T72]      do_syscall_64+0xc6/0x1e0
[ 1342.425795][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1342.425795][   T72] 
[ 1352.668708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1352.669151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1352.669151][   T72]      netdev_get_by_index+0x5e/0x80
[ 1352.669151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1352.669151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1352.669151][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1352.669151][   T72]      ipv6_add_addr+0x411/0x2000
[ 1352.669151][   T72]      inet6_addr_add+0x30e/0xa40
[ 1352.669151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1352.669151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.669151][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.669151][   T72]      netlink_unicast+0x449/0x710
[ 1352.669151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.669151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.669151][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.669151][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.669151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.669151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.669151][   T72] 
[ 1352.671137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1352.671137][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1352.671137][   T72]      ipv6_find_idev+0x102/0x170
[ 1352.671137][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1352.671137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.671137][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.671137][   T72]      netlink_unicast+0x449/0x710
[ 1352.671137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.671137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.671137][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.671137][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.671137][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.671137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.671137][   T72] 
[ 1352.672656][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1352.672656][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1352.672656][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1352.672656][   T72]      ipv6_find_idev+0x102/0x170
[ 1352.672656][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1352.672656][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.672656][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.672656][   T72]      netlink_unicast+0x449/0x710
[ 1352.672656][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.672656][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.672656][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.672656][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.672656][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.672656][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.672656][   T72] 
[ 1352.674401][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1352.674681][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1352.674681][   T72]      netdev_get_by_index+0x5e/0x80
[ 1352.674681][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1352.674681][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1352.674681][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1352.674681][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1352.674681][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1352.674681][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1352.674681][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1352.674681][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1352.674681][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1352.674681][   T72]      vfs_write+0x9e5/0x10a0
[ 1352.674681][   T72]      ksys_write+0xf5/0x1e0
[ 1352.674681][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.674681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.674681][   T72] 
[ 1352.676502][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1352.676502][   T72]      netdev_get_by_index+0x5e/0x80
[ 1352.676502][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1352.676502][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1352.676502][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1352.676502][   T72]      ipv6_add_addr+0x411/0x2000
[ 1352.676502][   T72]      inet6_addr_add+0x30e/0xa40
[ 1352.676502][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1352.676502][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.676502][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.676502][   T72]      netlink_unicast+0x449/0x710
[ 1352.676502][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.676502][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.676502][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.676502][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.676502][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.676502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.676502][   T72] 
[ 1352.678469][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1352.678469][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1352.678469][   T72]      ipv6_find_idev+0x102/0x170
[ 1352.678469][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1352.678469][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.678469][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.678469][   T72]      netlink_unicast+0x449/0x710
[ 1352.678469][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.678469][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.678469][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.678469][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.678469][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.678469][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.678469][   T72] 
[ 1352.679982][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1352.679982][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1352.679982][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1352.679982][   T72]      ipv6_find_idev+0x102/0x170
[ 1352.679982][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1352.679982][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1352.679982][   T72]      netlink_rcv_skb+0x130/0x360
[ 1352.679982][   T72]      netlink_unicast+0x449/0x710
[ 1352.679982][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1352.679982][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1352.679982][   T72]      ___sys_sendmsg+0xee/0x170
[ 1352.679982][   T72]      __sys_sendmsg+0xcd/0x170
[ 1352.679982][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.679982][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.679982][   T72] 
[ 1352.681642][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1352.681880][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1352.681880][   T72]      dst_init+0x84/0x4a0
[ 1352.681880][   T72]      dst_alloc+0x97/0x150
[ 1352.681880][   T72]      ip6_dst_alloc+0x23/0x90
[ 1352.681880][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1352.681880][   T72]      ip6_pol_route+0x56f/0x840
[ 1352.681880][   T72]      fib6_rule_lookup+0x227/0x600
[ 1352.681880][   T72]      ip6_route_output_flags+0x251/0x460
[ 1352.681880][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1352.681880][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1352.681880][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1352.681880][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1352.681880][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1352.681880][   T72]      __sys_connect+0x217/0x2a0
[ 1352.681880][   T72]      __x64_sys_connect+0x72/0xb0
[ 1352.681880][   T72]      do_syscall_64+0xc6/0x1e0
[ 1352.681880][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1352.681880][   T72] 
[ 1352.996740][   T42] INFO: task modprobe:1562 blocked for more than 860 seconds.
[ 1352.997048][   T42]       Not tainted 6.8.0-virtme #1
[ 1352.997170][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1352.997366][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1352.997637][   T42] Call Trace:
[ 1352.997733][   T42]  <TASK>
[ 1352.997803][   T42]  __schedule+0x705/0x1ac0
[ 1352.997942][   T42]  ? __pfx___schedule+0x10/0x10
[ 1352.998067][   T42]  ? schedule+0x1a5/0x210
[ 1352.998163][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1352.998291][   T42]  ? mark_lock+0x38/0x3e0
[ 1352.998384][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1352.998511][   T42]  ? schedule+0x1a5/0x210
[ 1352.998626][   T42]  schedule+0xdf/0x210
[ 1352.998721][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1352.998845][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1352.998975][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1352.999127][   T42]  ? kasan_save_stack+0x34/0x50
[ 1352.999252][   T42]  ? kasan_save_stack+0x24/0x50
[ 1352.999374][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1352.999502][   T42]  ? lock_acquire+0x1c1/0x220
[ 1352.999636][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1352.999765][   T42]  down_write+0x1c9/0x200
[ 1352.999859][   T42]  ? __pfx_down_write+0x10/0x10
[ 1352.999983][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1353.000110][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1353.000301][   T42]  register_pernet_subsys+0x1a/0x50
[ 1353.000427][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1353.000610][   T42]  do_one_initcall+0xc8/0x3f0
[ 1353.000734][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1353.000860][   T42]  ? __create_object+0x5e/0xb0
[ 1353.000986][   T42]  ? kasan_unpoison+0x27/0x60
[ 1353.001245][   T42]  do_init_module+0x233/0x740
[ 1353.001380][   T42]  load_module+0x16b5/0x2350
[ 1353.001514][   T42]  ? __pfx_load_module+0x10/0x10
[ 1353.001649][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1353.001778][   T42]  ? kernel_read_file+0x300/0x520
[ 1353.001905][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1353.002035][   T42]  ? init_module_from_file+0xd2/0x130
[ 1353.002160][   T42]  init_module_from_file+0xd2/0x130
[ 1353.002285][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1353.002436][   T42]  ? __lock_release+0x103/0x460
[ 1353.002558][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1353.002701][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1353.002824][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1353.002951][   T42]  idempotent_init_module+0x342/0x620
[ 1353.003077][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1353.003249][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1353.003373][   T42]  do_syscall_64+0xc6/0x1e0
[ 1353.003496][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1353.003658][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1353.003794][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1353.003978][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1353.004159][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1353.004341][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1353.004524][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1353.004717][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1353.004911][   T42]  </TASK>
[ 1353.005004][   T42] 
[ 1353.005004][   T42] Showing all locks held in the system:
[ 1353.005180][   T42] 1 lock held by khungtaskd/42:
[ 1353.005302][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1353.005524][   T42] 3 locks held by kworker/u16:1/72:
[ 1353.005651][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1353.005898][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1353.006121][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1353.006338][   T42] 2 locks held by kworker/u20:3/1240:
[ 1353.006454][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1353.006704][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1353.006983][   T42] 1 lock held by modprobe/1562:
[ 1353.007098][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1353.007342][   T42] 
[ 1353.007402][   T42] =============================================
[ 1353.007402][   T42] 
[ 1362.700716][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1362.701161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1362.701161][   T72]      netdev_get_by_index+0x5e/0x80
[ 1362.701161][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1362.701161][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1362.701161][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1362.701161][   T72]      ipv6_add_addr+0x411/0x2000
[ 1362.701161][   T72]      inet6_addr_add+0x30e/0xa40
[ 1362.701161][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1362.701161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.701161][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.701161][   T72]      netlink_unicast+0x449/0x710
[ 1362.701161][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.701161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.701161][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.701161][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.701161][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.701161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.701161][   T72] 
[ 1362.703149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1362.703149][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1362.703149][   T72]      ipv6_find_idev+0x102/0x170
[ 1362.703149][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1362.703149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.703149][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.703149][   T72]      netlink_unicast+0x449/0x710
[ 1362.703149][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.703149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.703149][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.703149][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.703149][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.703149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.703149][   T72] 
[ 1362.704676][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1362.704676][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1362.704676][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1362.704676][   T72]      ipv6_find_idev+0x102/0x170
[ 1362.704676][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1362.704676][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.704676][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.704676][   T72]      netlink_unicast+0x449/0x710
[ 1362.704676][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.704676][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.704676][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.704676][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.704676][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.704676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.704676][   T72] 
[ 1362.706338][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1362.706617][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1362.706617][   T72]      netdev_get_by_index+0x5e/0x80
[ 1362.706617][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1362.706617][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1362.706617][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1362.706617][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1362.706617][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1362.706617][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1362.706617][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1362.706617][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1362.706617][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1362.706617][   T72]      vfs_write+0x9e5/0x10a0
[ 1362.706617][   T72]      ksys_write+0xf5/0x1e0
[ 1362.706617][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.706617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.706617][   T72] 
[ 1362.708426][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1362.708426][   T72]      netdev_get_by_index+0x5e/0x80
[ 1362.708426][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1362.708426][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1362.708426][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1362.708426][   T72]      ipv6_add_addr+0x411/0x2000
[ 1362.708426][   T72]      inet6_addr_add+0x30e/0xa40
[ 1362.708426][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1362.708426][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.708426][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.708426][   T72]      netlink_unicast+0x449/0x710
[ 1362.708426][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.708426][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.708426][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.708426][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.708426][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.708426][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.708426][   T72] 
[ 1362.710394][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1362.710394][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1362.710394][   T72]      ipv6_find_idev+0x102/0x170
[ 1362.710394][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1362.710394][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.710394][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.710394][   T72]      netlink_unicast+0x449/0x710
[ 1362.710394][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.710394][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.710394][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.710394][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.710394][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.710394][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.710394][   T72] 
[ 1362.711903][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1362.711903][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1362.711903][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1362.711903][   T72]      ipv6_find_idev+0x102/0x170
[ 1362.711903][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1362.711903][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1362.711903][   T72]      netlink_rcv_skb+0x130/0x360
[ 1362.711903][   T72]      netlink_unicast+0x449/0x710
[ 1362.711903][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1362.711903][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1362.711903][   T72]      ___sys_sendmsg+0xee/0x170
[ 1362.711903][   T72]      __sys_sendmsg+0xcd/0x170
[ 1362.711903][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.711903][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.711903][   T72] 
[ 1362.713545][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1362.713839][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1362.713839][   T72]      dst_init+0x84/0x4a0
[ 1362.713839][   T72]      dst_alloc+0x97/0x150
[ 1362.713839][   T72]      ip6_dst_alloc+0x23/0x90
[ 1362.713839][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1362.713839][   T72]      ip6_pol_route+0x56f/0x840
[ 1362.713839][   T72]      fib6_rule_lookup+0x227/0x600
[ 1362.713839][   T72]      ip6_route_output_flags+0x251/0x460
[ 1362.713839][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1362.713839][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1362.713839][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1362.713839][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1362.713839][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1362.713839][   T72]      __sys_connect+0x217/0x2a0
[ 1362.713839][   T72]      __x64_sys_connect+0x72/0xb0
[ 1362.713839][   T72]      do_syscall_64+0xc6/0x1e0
[ 1362.713839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1362.713839][   T72] 
[ 1372.956720][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1372.957154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1372.957154][   T72]      netdev_get_by_index+0x5e/0x80
[ 1372.957154][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1372.957154][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1372.957154][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1372.957154][   T72]      ipv6_add_addr+0x411/0x2000
[ 1372.957154][   T72]      inet6_addr_add+0x30e/0xa40
[ 1372.957154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1372.957154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.957154][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.957154][   T72]      netlink_unicast+0x449/0x710
[ 1372.957154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.957154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.957154][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.957154][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.957154][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.957154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.957154][   T72] 
[ 1372.959138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1372.959138][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1372.959138][   T72]      ipv6_find_idev+0x102/0x170
[ 1372.959138][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1372.959138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.959138][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.959138][   T72]      netlink_unicast+0x449/0x710
[ 1372.959138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.959138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.959138][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.959138][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.959138][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.959138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.959138][   T72] 
[ 1372.960654][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1372.960654][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1372.960654][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1372.960654][   T72]      ipv6_find_idev+0x102/0x170
[ 1372.960654][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1372.960654][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.960654][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.960654][   T72]      netlink_unicast+0x449/0x710
[ 1372.960654][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.960654][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.960654][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.960654][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.960654][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.960654][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.960654][   T72] 
[ 1372.962313][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1372.962592][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1372.962592][   T72]      netdev_get_by_index+0x5e/0x80
[ 1372.962592][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1372.962592][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1372.962592][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1372.962592][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1372.962592][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1372.962592][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1372.962592][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1372.962592][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1372.962592][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1372.962592][   T72]      vfs_write+0x9e5/0x10a0
[ 1372.962592][   T72]      ksys_write+0xf5/0x1e0
[ 1372.962592][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.962592][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.962592][   T72] 
[ 1372.964489][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1372.964489][   T72]      netdev_get_by_index+0x5e/0x80
[ 1372.964489][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1372.964489][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1372.964489][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1372.964489][   T72]      ipv6_add_addr+0x411/0x2000
[ 1372.964489][   T72]      inet6_addr_add+0x30e/0xa40
[ 1372.964489][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1372.964489][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.964489][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.964489][   T72]      netlink_unicast+0x449/0x710
[ 1372.964489][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.964489][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.964489][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.964489][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.964489][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.964489][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.964489][   T72] 
[ 1372.966667][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1372.966667][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1372.966667][   T72]      ipv6_find_idev+0x102/0x170
[ 1372.966667][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1372.966667][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.966667][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.966667][   T72]      netlink_unicast+0x449/0x710
[ 1372.966667][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.966667][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.966667][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.966667][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.966667][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.966667][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.966667][   T72] 
[ 1372.968348][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1372.968348][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1372.968348][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1372.968348][   T72]      ipv6_find_idev+0x102/0x170
[ 1372.968348][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1372.968348][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1372.968348][   T72]      netlink_rcv_skb+0x130/0x360
[ 1372.968348][   T72]      netlink_unicast+0x449/0x710
[ 1372.968348][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1372.968348][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1372.968348][   T72]      ___sys_sendmsg+0xee/0x170
[ 1372.968348][   T72]      __sys_sendmsg+0xcd/0x170
[ 1372.968348][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.968348][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.968348][   T72] 
[ 1372.970177][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1372.970430][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1372.970430][   T72]      dst_init+0x84/0x4a0
[ 1372.970430][   T72]      dst_alloc+0x97/0x150
[ 1372.970430][   T72]      ip6_dst_alloc+0x23/0x90
[ 1372.970430][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1372.970430][   T72]      ip6_pol_route+0x56f/0x840
[ 1372.970430][   T72]      fib6_rule_lookup+0x227/0x600
[ 1372.970430][   T72]      ip6_route_output_flags+0x251/0x460
[ 1372.970430][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1372.970430][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1372.970430][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1372.970430][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1372.970430][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1372.970430][   T72]      __sys_connect+0x217/0x2a0
[ 1372.970430][   T72]      __x64_sys_connect+0x72/0xb0
[ 1372.970430][   T72]      do_syscall_64+0xc6/0x1e0
[ 1372.970430][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1372.970430][   T72] 
[ 1383.212694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1383.213093][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1383.213093][   T72]      netdev_get_by_index+0x5e/0x80
[ 1383.213093][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1383.213093][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1383.213093][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1383.213093][   T72]      ipv6_add_addr+0x411/0x2000
[ 1383.213093][   T72]      inet6_addr_add+0x30e/0xa40
[ 1383.213093][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1383.213093][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.213093][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.213093][   T72]      netlink_unicast+0x449/0x710
[ 1383.213093][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.213093][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.213093][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.213093][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.213093][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.213093][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.213093][   T72] 
[ 1383.215313][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1383.215313][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1383.215313][   T72]      ipv6_find_idev+0x102/0x170
[ 1383.215313][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1383.215313][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.215313][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.215313][   T72]      netlink_unicast+0x449/0x710
[ 1383.215313][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.215313][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.215313][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.215313][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.215313][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.215313][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.215313][   T72] 
[ 1383.217004][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1383.217004][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1383.217004][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1383.217004][   T72]      ipv6_find_idev+0x102/0x170
[ 1383.217004][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1383.217004][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.217004][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.217004][   T72]      netlink_unicast+0x449/0x710
[ 1383.217004][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.217004][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.217004][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.217004][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.217004][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.217004][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.217004][   T72] 
[ 1383.218850][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1383.219135][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1383.219135][   T72]      netdev_get_by_index+0x5e/0x80
[ 1383.219135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1383.219135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1383.219135][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1383.219135][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1383.219135][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1383.219135][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1383.219135][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1383.219135][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1383.219135][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1383.219135][   T72]      vfs_write+0x9e5/0x10a0
[ 1383.219135][   T72]      ksys_write+0xf5/0x1e0
[ 1383.219135][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.219135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.219135][   T72] 
[ 1383.221156][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1383.221156][   T72]      netdev_get_by_index+0x5e/0x80
[ 1383.221156][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1383.221156][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1383.221156][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1383.221156][   T72]      ipv6_add_addr+0x411/0x2000
[ 1383.221156][   T72]      inet6_addr_add+0x30e/0xa40
[ 1383.221156][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1383.221156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.221156][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.221156][   T72]      netlink_unicast+0x449/0x710
[ 1383.221156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.221156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.221156][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.221156][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.221156][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.221156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.221156][   T72] 
[ 1383.223337][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1383.223337][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1383.223337][   T72]      ipv6_find_idev+0x102/0x170
[ 1383.223337][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1383.223337][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.223337][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.223337][   T72]      netlink_unicast+0x449/0x710
[ 1383.223337][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.223337][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.223337][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.223337][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.223337][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.223337][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.223337][   T72] 
[ 1383.225081][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1383.225081][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1383.225081][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1383.225081][   T72]      ipv6_find_idev+0x102/0x170
[ 1383.225081][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1383.225081][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1383.225081][   T72]      netlink_rcv_skb+0x130/0x360
[ 1383.225081][   T72]      netlink_unicast+0x449/0x710
[ 1383.225081][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1383.225081][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1383.225081][   T72]      ___sys_sendmsg+0xee/0x170
[ 1383.225081][   T72]      __sys_sendmsg+0xcd/0x170
[ 1383.225081][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.225081][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.225081][   T72] 
[ 1383.226921][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1383.227176][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1383.227176][   T72]      dst_init+0x84/0x4a0
[ 1383.227176][   T72]      dst_alloc+0x97/0x150
[ 1383.227176][   T72]      ip6_dst_alloc+0x23/0x90
[ 1383.227176][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1383.227176][   T72]      ip6_pol_route+0x56f/0x840
[ 1383.227176][   T72]      fib6_rule_lookup+0x227/0x600
[ 1383.227176][   T72]      ip6_route_output_flags+0x251/0x460
[ 1383.227176][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1383.227176][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1383.227176][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1383.227176][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1383.227176][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1383.227176][   T72]      __sys_connect+0x217/0x2a0
[ 1383.227176][   T72]      __x64_sys_connect+0x72/0xb0
[ 1383.227176][   T72]      do_syscall_64+0xc6/0x1e0
[ 1383.227176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1383.227176][   T72] 
[ 1393.468657][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1393.469116][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1393.469116][   T72]      netdev_get_by_index+0x5e/0x80
[ 1393.469116][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1393.469116][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1393.469116][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1393.469116][   T72]      ipv6_add_addr+0x411/0x2000
[ 1393.469116][   T72]      inet6_addr_add+0x30e/0xa40
[ 1393.469116][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1393.469116][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.469116][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.469116][   T72]      netlink_unicast+0x449/0x710
[ 1393.469116][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.469116][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.469116][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.469116][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.469116][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.469116][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.469116][   T72] 
[ 1393.471309][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1393.471309][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1393.471309][   T72]      ipv6_find_idev+0x102/0x170
[ 1393.471309][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1393.471309][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.471309][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.471309][   T72]      netlink_unicast+0x449/0x710
[ 1393.471309][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.471309][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.471309][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.471309][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.471309][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.471309][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.471309][   T72] 
[ 1393.473011][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1393.473011][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1393.473011][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1393.473011][   T72]      ipv6_find_idev+0x102/0x170
[ 1393.473011][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1393.473011][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.473011][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.473011][   T72]      netlink_unicast+0x449/0x710
[ 1393.473011][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.473011][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.473011][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.473011][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.473011][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.473011][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.473011][   T72] 
[ 1393.476099][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1393.476673][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1393.476673][   T72]      netdev_get_by_index+0x5e/0x80
[ 1393.476673][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1393.476673][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1393.476673][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1393.476673][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1393.476673][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1393.476673][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1393.476673][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1393.476673][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1393.476673][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1393.476673][   T72]      vfs_write+0x9e5/0x10a0
[ 1393.476673][   T72]      ksys_write+0xf5/0x1e0
[ 1393.476673][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.476673][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.476673][   T72] 
[ 1393.478736][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1393.478736][   T72]      netdev_get_by_index+0x5e/0x80
[ 1393.478736][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1393.478736][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1393.478736][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1393.478736][   T72]      ipv6_add_addr+0x411/0x2000
[ 1393.478736][   T72]      inet6_addr_add+0x30e/0xa40
[ 1393.478736][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1393.478736][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.478736][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.478736][   T72]      netlink_unicast+0x449/0x710
[ 1393.478736][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.478736][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.478736][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.478736][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.478736][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.478736][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.478736][   T72] 
[ 1393.480921][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1393.480921][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1393.480921][   T72]      ipv6_find_idev+0x102/0x170
[ 1393.480921][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1393.480921][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.480921][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.480921][   T72]      netlink_unicast+0x449/0x710
[ 1393.480921][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.480921][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.480921][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.480921][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.480921][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.480921][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.480921][   T72] 
[ 1393.482603][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1393.482603][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1393.482603][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1393.482603][   T72]      ipv6_find_idev+0x102/0x170
[ 1393.482603][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1393.482603][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1393.482603][   T72]      netlink_rcv_skb+0x130/0x360
[ 1393.482603][   T72]      netlink_unicast+0x449/0x710
[ 1393.482603][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1393.482603][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1393.482603][   T72]      ___sys_sendmsg+0xee/0x170
[ 1393.482603][   T72]      __sys_sendmsg+0xcd/0x170
[ 1393.482603][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.482603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.482603][   T72] 
[ 1393.484439][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1393.484705][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1393.484705][   T72]      dst_init+0x84/0x4a0
[ 1393.484705][   T72]      dst_alloc+0x97/0x150
[ 1393.484705][   T72]      ip6_dst_alloc+0x23/0x90
[ 1393.484705][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1393.484705][   T72]      ip6_pol_route+0x56f/0x840
[ 1393.484705][   T72]      fib6_rule_lookup+0x227/0x600
[ 1393.484705][   T72]      ip6_route_output_flags+0x251/0x460
[ 1393.484705][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1393.484705][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1393.484705][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1393.484705][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1393.484705][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1393.484705][   T72]      __sys_connect+0x217/0x2a0
[ 1393.484705][   T72]      __x64_sys_connect+0x72/0xb0
[ 1393.484705][   T72]      do_syscall_64+0xc6/0x1e0
[ 1393.484705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1393.484705][   T72] 
[ 1403.724699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1403.725148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1403.725148][   T72]      netdev_get_by_index+0x5e/0x80
[ 1403.725148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1403.725148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1403.725148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1403.725148][   T72]      ipv6_add_addr+0x411/0x2000
[ 1403.725148][   T72]      inet6_addr_add+0x30e/0xa40
[ 1403.725148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1403.725148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.725148][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.725148][   T72]      netlink_unicast+0x449/0x710
[ 1403.725148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.725148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.725148][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.725148][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.725148][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.725148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.725148][   T72] 
[ 1403.727339][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1403.727339][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1403.727339][   T72]      ipv6_find_idev+0x102/0x170
[ 1403.727339][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1403.727339][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.727339][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.727339][   T72]      netlink_unicast+0x449/0x710
[ 1403.727339][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.727339][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.727339][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.727339][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.727339][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.727339][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.727339][   T72] 
[ 1403.729025][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1403.729025][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1403.729025][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1403.729025][   T72]      ipv6_find_idev+0x102/0x170
[ 1403.729025][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1403.729025][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.729025][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.729025][   T72]      netlink_unicast+0x449/0x710
[ 1403.729025][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.729025][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.729025][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.729025][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.729025][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.729025][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.729025][   T72] 
[ 1403.730862][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1403.731151][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1403.731151][   T72]      netdev_get_by_index+0x5e/0x80
[ 1403.731151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1403.731151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1403.731151][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1403.731151][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1403.731151][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1403.731151][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1403.731151][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1403.731151][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1403.731151][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1403.731151][   T72]      vfs_write+0x9e5/0x10a0
[ 1403.731151][   T72]      ksys_write+0xf5/0x1e0
[ 1403.731151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.731151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.731151][   T72] 
[ 1403.733177][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1403.733177][   T72]      netdev_get_by_index+0x5e/0x80
[ 1403.733177][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1403.733177][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1403.733177][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1403.733177][   T72]      ipv6_add_addr+0x411/0x2000
[ 1403.733177][   T72]      inet6_addr_add+0x30e/0xa40
[ 1403.733177][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1403.733177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.733177][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.733177][   T72]      netlink_unicast+0x449/0x710
[ 1403.733177][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.733177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.733177][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.733177][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.733177][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.733177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.733177][   T72] 
[ 1403.735365][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1403.735365][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1403.735365][   T72]      ipv6_find_idev+0x102/0x170
[ 1403.735365][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1403.735365][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.735365][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.735365][   T72]      netlink_unicast+0x449/0x710
[ 1403.735365][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.735365][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.735365][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.735365][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.735365][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.735365][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.735365][   T72] 
[ 1403.737045][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1403.737045][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1403.737045][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1403.737045][   T72]      ipv6_find_idev+0x102/0x170
[ 1403.737045][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1403.737045][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1403.737045][   T72]      netlink_rcv_skb+0x130/0x360
[ 1403.737045][   T72]      netlink_unicast+0x449/0x710
[ 1403.737045][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1403.737045][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1403.737045][   T72]      ___sys_sendmsg+0xee/0x170
[ 1403.737045][   T72]      __sys_sendmsg+0xcd/0x170
[ 1403.737045][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.737045][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.737045][   T72] 
[ 1403.738881][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1403.739139][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1403.739139][   T72]      dst_init+0x84/0x4a0
[ 1403.739139][   T72]      dst_alloc+0x97/0x150
[ 1403.739139][   T72]      ip6_dst_alloc+0x23/0x90
[ 1403.739139][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1403.739139][   T72]      ip6_pol_route+0x56f/0x840
[ 1403.739139][   T72]      fib6_rule_lookup+0x227/0x600
[ 1403.739139][   T72]      ip6_route_output_flags+0x251/0x460
[ 1403.739139][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1403.739139][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1403.739139][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1403.739139][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1403.739139][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1403.739139][   T72]      __sys_connect+0x217/0x2a0
[ 1403.739139][   T72]      __x64_sys_connect+0x72/0xb0
[ 1403.739139][   T72]      do_syscall_64+0xc6/0x1e0
[ 1403.739139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1403.739139][   T72] 
[ 1413.980709][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1413.981113][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1413.981113][   T72]      netdev_get_by_index+0x5e/0x80
[ 1413.981113][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1413.981113][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1413.981113][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1413.981113][   T72]      ipv6_add_addr+0x411/0x2000
[ 1413.981113][   T72]      inet6_addr_add+0x30e/0xa40
[ 1413.981113][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1413.981113][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.981113][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.981113][   T72]      netlink_unicast+0x449/0x710
[ 1413.981113][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.981113][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.981113][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.981113][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.981113][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.981113][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.981113][   T72] 
[ 1413.983317][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1413.983317][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1413.983317][   T72]      ipv6_find_idev+0x102/0x170
[ 1413.983317][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1413.983317][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.983317][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.983317][   T72]      netlink_unicast+0x449/0x710
[ 1413.983317][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.983317][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.983317][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.983317][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.983317][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.983317][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.983317][   T72] 
[ 1413.985018][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1413.985018][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1413.985018][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1413.985018][   T72]      ipv6_find_idev+0x102/0x170
[ 1413.985018][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1413.985018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.985018][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.985018][   T72]      netlink_unicast+0x449/0x710
[ 1413.985018][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.985018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.985018][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.985018][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.985018][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.985018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.985018][   T72] 
[ 1413.986869][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1413.987160][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1413.987160][   T72]      netdev_get_by_index+0x5e/0x80
[ 1413.987160][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1413.987160][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1413.987160][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1413.987160][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1413.987160][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1413.987160][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1413.987160][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1413.987160][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1413.987160][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1413.987160][   T72]      vfs_write+0x9e5/0x10a0
[ 1413.987160][   T72]      ksys_write+0xf5/0x1e0
[ 1413.987160][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.987160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.987160][   T72] 
[ 1413.989179][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1413.989179][   T72]      netdev_get_by_index+0x5e/0x80
[ 1413.989179][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1413.989179][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1413.989179][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1413.989179][   T72]      ipv6_add_addr+0x411/0x2000
[ 1413.989179][   T72]      inet6_addr_add+0x30e/0xa40
[ 1413.989179][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1413.989179][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.989179][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.989179][   T72]      netlink_unicast+0x449/0x710
[ 1413.989179][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.989179][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.989179][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.989179][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.989179][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.989179][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.989179][   T72] 
[ 1413.991366][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1413.991366][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1413.991366][   T72]      ipv6_find_idev+0x102/0x170
[ 1413.991366][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1413.991366][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.991366][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.991366][   T72]      netlink_unicast+0x449/0x710
[ 1413.991366][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.991366][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.991366][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.991366][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.991366][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.991366][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.991366][   T72] 
[ 1413.993049][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1413.993049][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1413.993049][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1413.993049][   T72]      ipv6_find_idev+0x102/0x170
[ 1413.993049][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1413.993049][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1413.993049][   T72]      netlink_rcv_skb+0x130/0x360
[ 1413.993049][   T72]      netlink_unicast+0x449/0x710
[ 1413.993049][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1413.993049][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1413.993049][   T72]      ___sys_sendmsg+0xee/0x170
[ 1413.993049][   T72]      __sys_sendmsg+0xcd/0x170
[ 1413.993049][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.993049][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.993049][   T72] 
[ 1413.994882][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1413.995134][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1413.995134][   T72]      dst_init+0x84/0x4a0
[ 1413.995134][   T72]      dst_alloc+0x97/0x150
[ 1413.995134][   T72]      ip6_dst_alloc+0x23/0x90
[ 1413.995134][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1413.995134][   T72]      ip6_pol_route+0x56f/0x840
[ 1413.995134][   T72]      fib6_rule_lookup+0x227/0x600
[ 1413.995134][   T72]      ip6_route_output_flags+0x251/0x460
[ 1413.995134][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1413.995134][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1413.995134][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1413.995134][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1413.995134][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1413.995134][   T72]      __sys_connect+0x217/0x2a0
[ 1413.995134][   T72]      __x64_sys_connect+0x72/0xb0
[ 1413.995134][   T72]      do_syscall_64+0xc6/0x1e0
[ 1413.995134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1413.995134][   T72] 
[ 1424.196719][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1424.197172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1424.197172][   T72]      netdev_get_by_index+0x5e/0x80
[ 1424.197172][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1424.197172][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1424.197172][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1424.197172][   T72]      ipv6_add_addr+0x411/0x2000
[ 1424.197172][   T72]      inet6_addr_add+0x30e/0xa40
[ 1424.197172][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1424.197172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.197172][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.197172][   T72]      netlink_unicast+0x449/0x710
[ 1424.197172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.197172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.197172][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.197172][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.197172][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.197172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.197172][   T72] 
[ 1424.199674][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1424.199674][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1424.199674][   T72]      ipv6_find_idev+0x102/0x170
[ 1424.199674][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1424.199674][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.199674][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.199674][   T72]      netlink_unicast+0x449/0x710
[ 1424.199674][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.199674][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.199674][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.199674][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.199674][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.199674][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.199674][   T72] 
[ 1424.201532][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1424.201532][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1424.201532][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1424.201532][   T72]      ipv6_find_idev+0x102/0x170
[ 1424.201532][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1424.201532][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.201532][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.201532][   T72]      netlink_unicast+0x449/0x710
[ 1424.201532][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.201532][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.201532][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.201532][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.201532][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.201532][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.201532][   T72] 
[ 1424.203446][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1424.203748][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1424.203748][   T72]      netdev_get_by_index+0x5e/0x80
[ 1424.203748][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1424.203748][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1424.203748][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1424.203748][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1424.203748][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1424.203748][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1424.203748][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1424.203748][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1424.203748][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1424.203748][   T72]      vfs_write+0x9e5/0x10a0
[ 1424.203748][   T72]      ksys_write+0xf5/0x1e0
[ 1424.203748][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.203748][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.203748][   T72] 
[ 1424.205593][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1424.205593][   T72]      netdev_get_by_index+0x5e/0x80
[ 1424.205593][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1424.205593][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1424.205593][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1424.205593][   T72]      ipv6_add_addr+0x411/0x2000
[ 1424.205593][   T72]      inet6_addr_add+0x30e/0xa40
[ 1424.205593][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1424.205593][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.205593][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.205593][   T72]      netlink_unicast+0x449/0x710
[ 1424.205593][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.205593][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.205593][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.205593][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.205593][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.205593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.205593][   T72] 
[ 1424.207578][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1424.207578][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1424.207578][   T72]      ipv6_find_idev+0x102/0x170
[ 1424.207578][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1424.207578][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.207578][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.207578][   T72]      netlink_unicast+0x449/0x710
[ 1424.207578][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.207578][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.207578][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.207578][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.207578][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.207578][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.207578][   T72] 
[ 1424.209615][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1424.209615][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1424.209615][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1424.209615][   T72]      ipv6_find_idev+0x102/0x170
[ 1424.209615][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1424.209615][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1424.209615][   T72]      netlink_rcv_skb+0x130/0x360
[ 1424.209615][   T72]      netlink_unicast+0x449/0x710
[ 1424.209615][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1424.209615][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1424.209615][   T72]      ___sys_sendmsg+0xee/0x170
[ 1424.209615][   T72]      __sys_sendmsg+0xcd/0x170
[ 1424.209615][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.209615][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.209615][   T72] 
[ 1424.211323][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1424.211561][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1424.211561][   T72]      dst_init+0x84/0x4a0
[ 1424.211561][   T72]      dst_alloc+0x97/0x150
[ 1424.211561][   T72]      ip6_dst_alloc+0x23/0x90
[ 1424.211561][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1424.211561][   T72]      ip6_pol_route+0x56f/0x840
[ 1424.211561][   T72]      fib6_rule_lookup+0x227/0x600
[ 1424.211561][   T72]      ip6_route_output_flags+0x251/0x460
[ 1424.211561][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1424.211561][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1424.211561][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1424.211561][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1424.211561][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1424.211561][   T72]      __sys_connect+0x217/0x2a0
[ 1424.211561][   T72]      __x64_sys_connect+0x72/0xb0
[ 1424.211561][   T72]      do_syscall_64+0xc6/0x1e0
[ 1424.211561][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1424.211561][   T72] 
[ 1434.452706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1434.453151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1434.453151][   T72]      netdev_get_by_index+0x5e/0x80
[ 1434.453151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1434.453151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1434.453151][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1434.453151][   T72]      ipv6_add_addr+0x411/0x2000
[ 1434.453151][   T72]      inet6_addr_add+0x30e/0xa40
[ 1434.453151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1434.453151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.453151][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.453151][   T72]      netlink_unicast+0x449/0x710
[ 1434.453151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.453151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.453151][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.453151][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.453151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.453151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.453151][   T72] 
[ 1434.455167][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1434.455167][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1434.455167][   T72]      ipv6_find_idev+0x102/0x170
[ 1434.455167][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1434.455167][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.455167][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.455167][   T72]      netlink_unicast+0x449/0x710
[ 1434.455167][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.455167][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.455167][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.455167][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.455167][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.455167][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.455167][   T72] 
[ 1434.456697][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1434.456697][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1434.456697][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1434.456697][   T72]      ipv6_find_idev+0x102/0x170
[ 1434.456697][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1434.456697][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.456697][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.456697][   T72]      netlink_unicast+0x449/0x710
[ 1434.456697][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.456697][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.456697][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.456697][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.456697][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.456697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.456697][   T72] 
[ 1434.458382][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1434.458663][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1434.458663][   T72]      netdev_get_by_index+0x5e/0x80
[ 1434.458663][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1434.458663][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1434.458663][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1434.458663][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1434.458663][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1434.458663][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1434.458663][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1434.458663][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1434.458663][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1434.458663][   T72]      vfs_write+0x9e5/0x10a0
[ 1434.458663][   T72]      ksys_write+0xf5/0x1e0
[ 1434.458663][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.458663][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.458663][   T72] 
[ 1434.460500][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1434.460500][   T72]      netdev_get_by_index+0x5e/0x80
[ 1434.460500][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1434.460500][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1434.460500][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1434.460500][   T72]      ipv6_add_addr+0x411/0x2000
[ 1434.460500][   T72]      inet6_addr_add+0x30e/0xa40
[ 1434.460500][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1434.460500][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.460500][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.460500][   T72]      netlink_unicast+0x449/0x710
[ 1434.460500][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.460500][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.460500][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.460500][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.460500][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.460500][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.460500][   T72] 
[ 1434.462493][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1434.462493][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1434.462493][   T72]      ipv6_find_idev+0x102/0x170
[ 1434.462493][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1434.462493][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.462493][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.462493][   T72]      netlink_unicast+0x449/0x710
[ 1434.462493][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.462493][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.462493][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.462493][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.462493][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.462493][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.462493][   T72] 
[ 1434.464033][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1434.464033][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1434.464033][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1434.464033][   T72]      ipv6_find_idev+0x102/0x170
[ 1434.464033][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1434.464033][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1434.464033][   T72]      netlink_rcv_skb+0x130/0x360
[ 1434.464033][   T72]      netlink_unicast+0x449/0x710
[ 1434.464033][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1434.464033][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1434.464033][   T72]      ___sys_sendmsg+0xee/0x170
[ 1434.464033][   T72]      __sys_sendmsg+0xcd/0x170
[ 1434.464033][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.464033][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.464033][   T72] 
[ 1434.465708][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1434.465952][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1434.465952][   T72]      dst_init+0x84/0x4a0
[ 1434.465952][   T72]      dst_alloc+0x97/0x150
[ 1434.465952][   T72]      ip6_dst_alloc+0x23/0x90
[ 1434.465952][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1434.465952][   T72]      ip6_pol_route+0x56f/0x840
[ 1434.465952][   T72]      fib6_rule_lookup+0x227/0x600
[ 1434.465952][   T72]      ip6_route_output_flags+0x251/0x460
[ 1434.465952][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1434.465952][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1434.465952][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1434.465952][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1434.465952][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1434.465952][   T72]      __sys_connect+0x217/0x2a0
[ 1434.465952][   T72]      __x64_sys_connect+0x72/0xb0
[ 1434.465952][   T72]      do_syscall_64+0xc6/0x1e0
[ 1434.465952][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1434.465952][   T72] 
[ 1444.708733][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1444.709127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1444.709127][   T72]      netdev_get_by_index+0x5e/0x80
[ 1444.709127][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1444.709127][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1444.709127][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1444.709127][   T72]      ipv6_add_addr+0x411/0x2000
[ 1444.709127][   T72]      inet6_addr_add+0x30e/0xa40
[ 1444.709127][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1444.709127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.709127][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.709127][   T72]      netlink_unicast+0x449/0x710
[ 1444.709127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.709127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.709127][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.709127][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.709127][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.709127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.709127][   T72] 
[ 1444.711097][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1444.711097][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1444.711097][   T72]      ipv6_find_idev+0x102/0x170
[ 1444.711097][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1444.711097][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.711097][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.711097][   T72]      netlink_unicast+0x449/0x710
[ 1444.711097][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.711097][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.711097][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.711097][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.711097][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.711097][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.711097][   T72] 
[ 1444.712615][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1444.712615][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1444.712615][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1444.712615][   T72]      ipv6_find_idev+0x102/0x170
[ 1444.712615][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1444.712615][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.712615][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.712615][   T72]      netlink_unicast+0x449/0x710
[ 1444.712615][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.712615][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.712615][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.712615][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.712615][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.712615][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.712615][   T72] 
[ 1444.714293][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1444.714562][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1444.714562][   T72]      netdev_get_by_index+0x5e/0x80
[ 1444.714562][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1444.714562][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1444.714562][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1444.714562][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1444.714562][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1444.714562][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1444.714562][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1444.714562][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1444.714562][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1444.714562][   T72]      vfs_write+0x9e5/0x10a0
[ 1444.714562][   T72]      ksys_write+0xf5/0x1e0
[ 1444.714562][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.714562][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.714562][   T72] 
[ 1444.716379][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1444.716379][   T72]      netdev_get_by_index+0x5e/0x80
[ 1444.716379][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1444.716379][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1444.716379][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1444.716379][   T72]      ipv6_add_addr+0x411/0x2000
[ 1444.716379][   T72]      inet6_addr_add+0x30e/0xa40
[ 1444.716379][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1444.716379][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.716379][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.716379][   T72]      netlink_unicast+0x449/0x710
[ 1444.716379][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.716379][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.716379][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.716379][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.716379][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.716379][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.716379][   T72] 
[ 1444.718338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1444.718338][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1444.718338][   T72]      ipv6_find_idev+0x102/0x170
[ 1444.718338][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1444.718338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.718338][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.718338][   T72]      netlink_unicast+0x449/0x710
[ 1444.718338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.718338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.718338][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.718338][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.718338][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.718338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.718338][   T72] 
[ 1444.719849][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1444.719849][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1444.719849][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1444.719849][   T72]      ipv6_find_idev+0x102/0x170
[ 1444.719849][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1444.719849][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1444.719849][   T72]      netlink_rcv_skb+0x130/0x360
[ 1444.719849][   T72]      netlink_unicast+0x449/0x710
[ 1444.719849][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1444.719849][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1444.719849][   T72]      ___sys_sendmsg+0xee/0x170
[ 1444.719849][   T72]      __sys_sendmsg+0xcd/0x170
[ 1444.719849][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.719849][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.719849][   T72] 
[ 1444.721505][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1444.721761][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1444.721761][   T72]      dst_init+0x84/0x4a0
[ 1444.721761][   T72]      dst_alloc+0x97/0x150
[ 1444.721761][   T72]      ip6_dst_alloc+0x23/0x90
[ 1444.721761][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1444.721761][   T72]      ip6_pol_route+0x56f/0x840
[ 1444.721761][   T72]      fib6_rule_lookup+0x227/0x600
[ 1444.721761][   T72]      ip6_route_output_flags+0x251/0x460
[ 1444.721761][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1444.721761][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1444.721761][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1444.721761][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1444.721761][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1444.721761][   T72]      __sys_connect+0x217/0x2a0
[ 1444.721761][   T72]      __x64_sys_connect+0x72/0xb0
[ 1444.721761][   T72]      do_syscall_64+0xc6/0x1e0
[ 1444.721761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1444.721761][   T72] 
[ 1454.916703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1454.917132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1454.917132][   T72]      netdev_get_by_index+0x5e/0x80
[ 1454.917132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1454.917132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1454.917132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1454.917132][   T72]      ipv6_add_addr+0x411/0x2000
[ 1454.917132][   T72]      inet6_addr_add+0x30e/0xa40
[ 1454.917132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1454.917132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.917132][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.917132][   T72]      netlink_unicast+0x449/0x710
[ 1454.917132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.917132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.917132][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.917132][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.917132][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.917132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.917132][   T72] 
[ 1454.919134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1454.919134][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1454.919134][   T72]      ipv6_find_idev+0x102/0x170
[ 1454.919134][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1454.919134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.919134][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.919134][   T72]      netlink_unicast+0x449/0x710
[ 1454.919134][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.919134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.919134][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.919134][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.919134][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.919134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.919134][   T72] 
[ 1454.920653][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1454.920653][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1454.920653][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1454.920653][   T72]      ipv6_find_idev+0x102/0x170
[ 1454.920653][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1454.920653][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.920653][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.920653][   T72]      netlink_unicast+0x449/0x710
[ 1454.920653][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.920653][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.920653][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.920653][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.920653][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.920653][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.920653][   T72] 
[ 1454.922307][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1454.922570][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1454.922570][   T72]      netdev_get_by_index+0x5e/0x80
[ 1454.922570][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1454.922570][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1454.922570][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1454.922570][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1454.922570][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1454.922570][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1454.922570][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1454.922570][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1454.922570][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1454.922570][   T72]      vfs_write+0x9e5/0x10a0
[ 1454.922570][   T72]      ksys_write+0xf5/0x1e0
[ 1454.922570][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.922570][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.922570][   T72] 
[ 1454.924392][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1454.924392][   T72]      netdev_get_by_index+0x5e/0x80
[ 1454.924392][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1454.924392][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1454.924392][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1454.924392][   T72]      ipv6_add_addr+0x411/0x2000
[ 1454.924392][   T72]      inet6_addr_add+0x30e/0xa40
[ 1454.924392][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1454.924392][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.924392][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.924392][   T72]      netlink_unicast+0x449/0x710
[ 1454.924392][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.924392][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.924392][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.924392][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.924392][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.924392][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.924392][   T72] 
[ 1454.926346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1454.926346][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1454.926346][   T72]      ipv6_find_idev+0x102/0x170
[ 1454.926346][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1454.926346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.926346][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.926346][   T72]      netlink_unicast+0x449/0x710
[ 1454.926346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.926346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.926346][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.926346][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.926346][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.926346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.926346][   T72] 
[ 1454.927852][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1454.927852][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1454.927852][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1454.927852][   T72]      ipv6_find_idev+0x102/0x170
[ 1454.927852][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1454.927852][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1454.927852][   T72]      netlink_rcv_skb+0x130/0x360
[ 1454.927852][   T72]      netlink_unicast+0x449/0x710
[ 1454.927852][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1454.927852][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1454.927852][   T72]      ___sys_sendmsg+0xee/0x170
[ 1454.927852][   T72]      __sys_sendmsg+0xcd/0x170
[ 1454.927852][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.927852][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.927852][   T72] 
[ 1454.929509][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1454.929769][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1454.929769][   T72]      dst_init+0x84/0x4a0
[ 1454.929769][   T72]      dst_alloc+0x97/0x150
[ 1454.929769][   T72]      ip6_dst_alloc+0x23/0x90
[ 1454.929769][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1454.929769][   T72]      ip6_pol_route+0x56f/0x840
[ 1454.929769][   T72]      fib6_rule_lookup+0x227/0x600
[ 1454.929769][   T72]      ip6_route_output_flags+0x251/0x460
[ 1454.929769][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1454.929769][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1454.929769][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1454.929769][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1454.929769][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1454.929769][   T72]      __sys_connect+0x217/0x2a0
[ 1454.929769][   T72]      __x64_sys_connect+0x72/0xb0
[ 1454.929769][   T72]      do_syscall_64+0xc6/0x1e0
[ 1454.929769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1454.929769][   T72] 
[ 1465.180708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1465.181090][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1465.181090][   T72]      netdev_get_by_index+0x5e/0x80
[ 1465.181090][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1465.181090][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1465.181090][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1465.181090][   T72]      ipv6_add_addr+0x411/0x2000
[ 1465.181090][   T72]      inet6_addr_add+0x30e/0xa40
[ 1465.181090][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1465.181090][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.181090][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.181090][   T72]      netlink_unicast+0x449/0x710
[ 1465.181090][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.181090][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.181090][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.181090][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.181090][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.181090][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.181090][   T72] 
[ 1465.183072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1465.183072][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1465.183072][   T72]      ipv6_find_idev+0x102/0x170
[ 1465.183072][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1465.183072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.183072][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.183072][   T72]      netlink_unicast+0x449/0x710
[ 1465.183072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.183072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.183072][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.183072][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.183072][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.183072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.183072][   T72] 
[ 1465.184647][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1465.184647][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1465.184647][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1465.184647][   T72]      ipv6_find_idev+0x102/0x170
[ 1465.184647][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1465.184647][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.184647][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.184647][   T72]      netlink_unicast+0x449/0x710
[ 1465.184647][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.184647][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.184647][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.184647][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.184647][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.184647][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.184647][   T72] 
[ 1465.186317][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1465.186582][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1465.186582][   T72]      netdev_get_by_index+0x5e/0x80
[ 1465.186582][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1465.186582][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1465.186582][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1465.186582][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1465.186582][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1465.186582][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1465.186582][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1465.186582][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1465.186582][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1465.186582][   T72]      vfs_write+0x9e5/0x10a0
[ 1465.186582][   T72]      ksys_write+0xf5/0x1e0
[ 1465.186582][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.186582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.186582][   T72] 
[ 1465.188401][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1465.188401][   T72]      netdev_get_by_index+0x5e/0x80
[ 1465.188401][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1465.188401][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1465.188401][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1465.188401][   T72]      ipv6_add_addr+0x411/0x2000
[ 1465.188401][   T72]      inet6_addr_add+0x30e/0xa40
[ 1465.188401][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1465.188401][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.188401][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.188401][   T72]      netlink_unicast+0x449/0x710
[ 1465.188401][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.188401][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.188401][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.188401][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.188401][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.188401][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.188401][   T72] 
[ 1465.190377][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1465.190377][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1465.190377][   T72]      ipv6_find_idev+0x102/0x170
[ 1465.190377][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1465.190377][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.190377][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.190377][   T72]      netlink_unicast+0x449/0x710
[ 1465.190377][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.190377][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.190377][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.190377][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.190377][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.190377][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.190377][   T72] 
[ 1465.191896][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1465.191896][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1465.191896][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1465.191896][   T72]      ipv6_find_idev+0x102/0x170
[ 1465.191896][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1465.191896][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1465.191896][   T72]      netlink_rcv_skb+0x130/0x360
[ 1465.191896][   T72]      netlink_unicast+0x449/0x710
[ 1465.191896][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1465.191896][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1465.191896][   T72]      ___sys_sendmsg+0xee/0x170
[ 1465.191896][   T72]      __sys_sendmsg+0xcd/0x170
[ 1465.191896][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.191896][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.191896][   T72] 
[ 1465.193558][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1465.193810][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1465.193810][   T72]      dst_init+0x84/0x4a0
[ 1465.193810][   T72]      dst_alloc+0x97/0x150
[ 1465.193810][   T72]      ip6_dst_alloc+0x23/0x90
[ 1465.193810][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1465.193810][   T72]      ip6_pol_route+0x56f/0x840
[ 1465.193810][   T72]      fib6_rule_lookup+0x227/0x600
[ 1465.193810][   T72]      ip6_route_output_flags+0x251/0x460
[ 1465.193810][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1465.193810][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1465.193810][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1465.193810][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1465.193810][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1465.193810][   T72]      __sys_connect+0x217/0x2a0
[ 1465.193810][   T72]      __x64_sys_connect+0x72/0xb0
[ 1465.193810][   T72]      do_syscall_64+0xc6/0x1e0
[ 1465.193810][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1465.193810][   T72] 
[ 1475.444727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1475.445162][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1475.445162][   T72]      netdev_get_by_index+0x5e/0x80
[ 1475.445162][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1475.445162][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1475.445162][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1475.445162][   T72]      ipv6_add_addr+0x411/0x2000
[ 1475.445162][   T72]      inet6_addr_add+0x30e/0xa40
[ 1475.445162][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1475.445162][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.445162][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.445162][   T72]      netlink_unicast+0x449/0x710
[ 1475.445162][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.445162][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.445162][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.445162][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.445162][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.445162][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.445162][   T72] 
[ 1475.447145][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1475.447145][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1475.447145][   T72]      ipv6_find_idev+0x102/0x170
[ 1475.447145][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1475.447145][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.447145][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.447145][   T72]      netlink_unicast+0x449/0x710
[ 1475.447145][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.447145][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.447145][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.447145][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.447145][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.447145][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.447145][   T72] 
[ 1475.448662][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1475.448662][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1475.448662][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1475.448662][   T72]      ipv6_find_idev+0x102/0x170
[ 1475.448662][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1475.448662][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.448662][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.448662][   T72]      netlink_unicast+0x449/0x710
[ 1475.448662][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.448662][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.448662][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.448662][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.448662][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.448662][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.448662][   T72] 
[ 1475.450330][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1475.450610][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1475.450610][   T72]      netdev_get_by_index+0x5e/0x80
[ 1475.450610][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1475.450610][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1475.450610][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1475.450610][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1475.450610][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1475.450610][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1475.450610][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1475.450610][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1475.450610][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1475.450610][   T72]      vfs_write+0x9e5/0x10a0
[ 1475.450610][   T72]      ksys_write+0xf5/0x1e0
[ 1475.450610][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.450610][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.450610][   T72] 
[ 1475.452418][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1475.452418][   T72]      netdev_get_by_index+0x5e/0x80
[ 1475.452418][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1475.452418][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1475.452418][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1475.452418][   T72]      ipv6_add_addr+0x411/0x2000
[ 1475.452418][   T72]      inet6_addr_add+0x30e/0xa40
[ 1475.452418][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1475.452418][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.452418][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.452418][   T72]      netlink_unicast+0x449/0x710
[ 1475.452418][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.452418][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.452418][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.452418][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.452418][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.452418][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.452418][   T72] 
[ 1475.454516][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1475.454516][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1475.454516][   T72]      ipv6_find_idev+0x102/0x170
[ 1475.454516][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1475.454516][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.454516][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.454516][   T72]      netlink_unicast+0x449/0x710
[ 1475.454516][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.454516][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.454516][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.454516][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.454516][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.454516][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.454516][   T72] 
[ 1475.456027][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1475.456027][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1475.456027][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1475.456027][   T72]      ipv6_find_idev+0x102/0x170
[ 1475.456027][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1475.456027][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1475.456027][   T72]      netlink_rcv_skb+0x130/0x360
[ 1475.456027][   T72]      netlink_unicast+0x449/0x710
[ 1475.456027][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1475.456027][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1475.456027][   T72]      ___sys_sendmsg+0xee/0x170
[ 1475.456027][   T72]      __sys_sendmsg+0xcd/0x170
[ 1475.456027][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.456027][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.456027][   T72] 
[ 1475.457677][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1475.457919][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1475.457919][   T72]      dst_init+0x84/0x4a0
[ 1475.457919][   T72]      dst_alloc+0x97/0x150
[ 1475.457919][   T72]      ip6_dst_alloc+0x23/0x90
[ 1475.457919][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1475.457919][   T72]      ip6_pol_route+0x56f/0x840
[ 1475.457919][   T72]      fib6_rule_lookup+0x227/0x600
[ 1475.457919][   T72]      ip6_route_output_flags+0x251/0x460
[ 1475.457919][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1475.457919][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1475.457919][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1475.457919][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1475.457919][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1475.457919][   T72]      __sys_connect+0x217/0x2a0
[ 1475.457919][   T72]      __x64_sys_connect+0x72/0xb0
[ 1475.457919][   T72]      do_syscall_64+0xc6/0x1e0
[ 1475.457919][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.457919][   T72] 
[ 1475.876712][   T42] INFO: task modprobe:1562 blocked for more than 983 seconds.
[ 1475.876937][   T42]       Not tainted 6.8.0-virtme #1
[ 1475.877056][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1475.877258][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1475.877505][   T42] Call Trace:
[ 1475.877621][   T42]  <TASK>
[ 1475.877697][   T42]  __schedule+0x705/0x1ac0
[ 1475.877835][   T42]  ? __pfx___schedule+0x10/0x10
[ 1475.877958][   T42]  ? schedule+0x1a5/0x210
[ 1475.878054][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1475.878186][   T42]  ? mark_lock+0x38/0x3e0
[ 1475.878282][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1475.878407][   T42]  ? schedule+0x1a5/0x210
[ 1475.878506][   T42]  schedule+0xdf/0x210
[ 1475.878611][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1475.878733][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1475.878860][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1475.879016][   T42]  ? kasan_save_stack+0x34/0x50
[ 1475.879138][   T42]  ? kasan_save_stack+0x24/0x50
[ 1475.879260][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1475.879391][   T42]  ? lock_acquire+0x1c1/0x220
[ 1475.879514][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1475.879655][   T42]  down_write+0x1c9/0x200
[ 1475.879750][   T42]  ? __pfx_down_write+0x10/0x10
[ 1475.879875][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1475.880002][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1475.880191][   T42]  register_pernet_subsys+0x1a/0x50
[ 1475.880317][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1475.880491][   T42]  do_one_initcall+0xc8/0x3f0
[ 1475.880627][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1475.880753][   T42]  ? __create_object+0x5e/0xb0
[ 1475.880883][   T42]  ? kasan_unpoison+0x27/0x60
[ 1475.881010][   T42]  do_init_module+0x233/0x740
[ 1475.881142][   T42]  load_module+0x16b5/0x2350
[ 1475.881276][   T42]  ? __pfx_load_module+0x10/0x10
[ 1475.881400][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1475.881534][   T42]  ? kernel_read_file+0x300/0x520
[ 1475.881667][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1475.881799][   T42]  ? init_module_from_file+0xd2/0x130
[ 1475.881920][   T42]  init_module_from_file+0xd2/0x130
[ 1475.882043][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1475.882193][   T42]  ? __lock_release+0x103/0x460
[ 1475.882320][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1475.882455][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1475.882578][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1475.882724][   T42]  idempotent_init_module+0x342/0x620
[ 1475.882861][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1475.883031][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1475.883178][   T42]  do_syscall_64+0xc6/0x1e0
[ 1475.883303][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1475.883455][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1475.883583][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1475.883780][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1475.883964][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1475.884142][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1475.884321][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1475.884503][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1475.884708][   T42]  </TASK>
[ 1475.884801][   T42] 
[ 1475.884801][   T42] Showing all locks held in the system:
[ 1475.884974][   T42] 1 lock held by khungtaskd/42:
[ 1475.885093][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1475.885314][   T42] 3 locks held by kworker/u16:1/72:
[ 1475.885436][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1475.885689][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1475.885905][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1475.886122][   T42] 2 locks held by kworker/u20:3/1240:
[ 1475.886244][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1475.886489][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1475.886795][   T42] 1 lock held by modprobe/1562:
[ 1475.886912][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1475.887160][   T42] 
[ 1475.887223][   T42] =============================================
[ 1475.887223][   T42] 
[ 1485.652641][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1485.653021][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1485.653021][   T72]      netdev_get_by_index+0x5e/0x80
[ 1485.653021][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1485.653021][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1485.653021][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1485.653021][   T72]      ipv6_add_addr+0x411/0x2000
[ 1485.653021][   T72]      inet6_addr_add+0x30e/0xa40
[ 1485.653021][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1485.653021][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.653021][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.653021][   T72]      netlink_unicast+0x449/0x710
[ 1485.653021][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.653021][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.653021][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.653021][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.653021][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.653021][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.653021][   T72] 
[ 1485.655070][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1485.655070][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1485.655070][   T72]      ipv6_find_idev+0x102/0x170
[ 1485.655070][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1485.655070][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.655070][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.655070][   T72]      netlink_unicast+0x449/0x710
[ 1485.655070][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.655070][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.655070][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.655070][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.655070][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.655070][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.655070][   T72] 
[ 1485.656603][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1485.656603][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1485.656603][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1485.656603][   T72]      ipv6_find_idev+0x102/0x170
[ 1485.656603][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1485.656603][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.656603][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.656603][   T72]      netlink_unicast+0x449/0x710
[ 1485.656603][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.656603][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.656603][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.656603][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.656603][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.656603][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.656603][   T72] 
[ 1485.658266][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1485.658538][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1485.658538][   T72]      netdev_get_by_index+0x5e/0x80
[ 1485.658538][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1485.658538][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1485.658538][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1485.658538][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1485.658538][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1485.658538][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1485.658538][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1485.658538][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1485.658538][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1485.658538][   T72]      vfs_write+0x9e5/0x10a0
[ 1485.658538][   T72]      ksys_write+0xf5/0x1e0
[ 1485.658538][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.658538][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.658538][   T72] 
[ 1485.660383][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1485.660383][   T72]      netdev_get_by_index+0x5e/0x80
[ 1485.660383][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1485.660383][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1485.660383][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1485.660383][   T72]      ipv6_add_addr+0x411/0x2000
[ 1485.660383][   T72]      inet6_addr_add+0x30e/0xa40
[ 1485.660383][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1485.660383][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.660383][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.660383][   T72]      netlink_unicast+0x449/0x710
[ 1485.660383][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.660383][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.660383][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.660383][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.660383][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.660383][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.660383][   T72] 
[ 1485.662354][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1485.662354][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1485.662354][   T72]      ipv6_find_idev+0x102/0x170
[ 1485.662354][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1485.662354][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.662354][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.662354][   T72]      netlink_unicast+0x449/0x710
[ 1485.662354][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.662354][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.662354][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.662354][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.662354][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.662354][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.662354][   T72] 
[ 1485.663901][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1485.663901][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1485.663901][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1485.663901][   T72]      ipv6_find_idev+0x102/0x170
[ 1485.663901][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1485.663901][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1485.663901][   T72]      netlink_rcv_skb+0x130/0x360
[ 1485.663901][   T72]      netlink_unicast+0x449/0x710
[ 1485.663901][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1485.663901][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1485.663901][   T72]      ___sys_sendmsg+0xee/0x170
[ 1485.663901][   T72]      __sys_sendmsg+0xcd/0x170
[ 1485.663901][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.663901][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.663901][   T72] 
[ 1485.665582][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1485.665831][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1485.665831][   T72]      dst_init+0x84/0x4a0
[ 1485.665831][   T72]      dst_alloc+0x97/0x150
[ 1485.665831][   T72]      ip6_dst_alloc+0x23/0x90
[ 1485.665831][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1485.665831][   T72]      ip6_pol_route+0x56f/0x840
[ 1485.665831][   T72]      fib6_rule_lookup+0x227/0x600
[ 1485.665831][   T72]      ip6_route_output_flags+0x251/0x460
[ 1485.665831][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1485.665831][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1485.665831][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1485.665831][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1485.665831][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1485.665831][   T72]      __sys_connect+0x217/0x2a0
[ 1485.665831][   T72]      __x64_sys_connect+0x72/0xb0
[ 1485.665831][   T72]      do_syscall_64+0xc6/0x1e0
[ 1485.665831][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1485.665831][   T72] 
[ 1495.908706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1495.909139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1495.909139][   T72]      netdev_get_by_index+0x5e/0x80
[ 1495.909139][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1495.909139][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1495.909139][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1495.909139][   T72]      ipv6_add_addr+0x411/0x2000
[ 1495.909139][   T72]      inet6_addr_add+0x30e/0xa40
[ 1495.909139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1495.909139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.909139][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.909139][   T72]      netlink_unicast+0x449/0x710
[ 1495.909139][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.909139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.909139][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.909139][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.909139][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.909139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.909139][   T72] 
[ 1495.911120][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1495.911120][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1495.911120][   T72]      ipv6_find_idev+0x102/0x170
[ 1495.911120][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1495.911120][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.911120][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.911120][   T72]      netlink_unicast+0x449/0x710
[ 1495.911120][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.911120][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.911120][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.911120][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.911120][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.911120][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.911120][   T72] 
[ 1495.912635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1495.912635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1495.912635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1495.912635][   T72]      ipv6_find_idev+0x102/0x170
[ 1495.912635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1495.912635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.912635][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.912635][   T72]      netlink_unicast+0x449/0x710
[ 1495.912635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.912635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.912635][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.912635][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.912635][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.912635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.912635][   T72] 
[ 1495.914319][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1495.914591][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1495.914591][   T72]      netdev_get_by_index+0x5e/0x80
[ 1495.914591][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1495.914591][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1495.914591][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1495.914591][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1495.914591][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1495.914591][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1495.914591][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1495.914591][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1495.914591][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1495.914591][   T72]      vfs_write+0x9e5/0x10a0
[ 1495.914591][   T72]      ksys_write+0xf5/0x1e0
[ 1495.914591][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.914591][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.914591][   T72] 
[ 1495.916405][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1495.916405][   T72]      netdev_get_by_index+0x5e/0x80
[ 1495.916405][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1495.916405][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1495.916405][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1495.916405][   T72]      ipv6_add_addr+0x411/0x2000
[ 1495.916405][   T72]      inet6_addr_add+0x30e/0xa40
[ 1495.916405][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1495.916405][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.916405][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.916405][   T72]      netlink_unicast+0x449/0x710
[ 1495.916405][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.916405][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.916405][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.916405][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.916405][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.916405][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.916405][   T72] 
[ 1495.918361][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1495.918361][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1495.918361][   T72]      ipv6_find_idev+0x102/0x170
[ 1495.918361][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1495.918361][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.918361][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.918361][   T72]      netlink_unicast+0x449/0x710
[ 1495.918361][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.918361][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.918361][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.918361][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.918361][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.918361][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.918361][   T72] 
[ 1495.919870][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1495.919870][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1495.919870][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1495.919870][   T72]      ipv6_find_idev+0x102/0x170
[ 1495.919870][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1495.919870][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1495.919870][   T72]      netlink_rcv_skb+0x130/0x360
[ 1495.919870][   T72]      netlink_unicast+0x449/0x710
[ 1495.919870][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1495.919870][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1495.919870][   T72]      ___sys_sendmsg+0xee/0x170
[ 1495.919870][   T72]      __sys_sendmsg+0xcd/0x170
[ 1495.919870][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.919870][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.919870][   T72] 
[ 1495.921526][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1495.921779][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1495.921779][   T72]      dst_init+0x84/0x4a0
[ 1495.921779][   T72]      dst_alloc+0x97/0x150
[ 1495.921779][   T72]      ip6_dst_alloc+0x23/0x90
[ 1495.921779][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1495.921779][   T72]      ip6_pol_route+0x56f/0x840
[ 1495.921779][   T72]      fib6_rule_lookup+0x227/0x600
[ 1495.921779][   T72]      ip6_route_output_flags+0x251/0x460
[ 1495.921779][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1495.921779][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1495.921779][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1495.921779][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1495.921779][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1495.921779][   T72]      __sys_connect+0x217/0x2a0
[ 1495.921779][   T72]      __x64_sys_connect+0x72/0xb0
[ 1495.921779][   T72]      do_syscall_64+0xc6/0x1e0
[ 1495.921779][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1495.921779][   T72] 
[ 1506.164714][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1506.165160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1506.165160][   T72]      netdev_get_by_index+0x5e/0x80
[ 1506.165160][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1506.165160][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1506.165160][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1506.165160][   T72]      ipv6_add_addr+0x411/0x2000
[ 1506.165160][   T72]      inet6_addr_add+0x30e/0xa40
[ 1506.165160][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1506.165160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.165160][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.165160][   T72]      netlink_unicast+0x449/0x710
[ 1506.165160][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.165160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.165160][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.165160][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.165160][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.165160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.165160][   T72] 
[ 1506.167129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1506.167129][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1506.167129][   T72]      ipv6_find_idev+0x102/0x170
[ 1506.167129][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1506.167129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.167129][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.167129][   T72]      netlink_unicast+0x449/0x710
[ 1506.167129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.167129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.167129][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.167129][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.167129][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.167129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.167129][   T72] 
[ 1506.168643][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1506.168643][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1506.168643][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1506.168643][   T72]      ipv6_find_idev+0x102/0x170
[ 1506.168643][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1506.168643][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.168643][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.168643][   T72]      netlink_unicast+0x449/0x710
[ 1506.168643][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.168643][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.168643][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.168643][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.168643][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.168643][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.168643][   T72] 
[ 1506.170295][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1506.170566][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1506.170566][   T72]      netdev_get_by_index+0x5e/0x80
[ 1506.170566][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1506.170566][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1506.170566][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1506.170566][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1506.170566][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1506.170566][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1506.170566][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1506.170566][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1506.170566][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1506.170566][   T72]      vfs_write+0x9e5/0x10a0
[ 1506.170566][   T72]      ksys_write+0xf5/0x1e0
[ 1506.170566][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.170566][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.170566][   T72] 
[ 1506.172438][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1506.172438][   T72]      netdev_get_by_index+0x5e/0x80
[ 1506.172438][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1506.172438][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1506.172438][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1506.172438][   T72]      ipv6_add_addr+0x411/0x2000
[ 1506.172438][   T72]      inet6_addr_add+0x30e/0xa40
[ 1506.172438][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1506.172438][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.172438][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.172438][   T72]      netlink_unicast+0x449/0x710
[ 1506.172438][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.172438][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.172438][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.172438][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.172438][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.172438][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.172438][   T72] 
[ 1506.174400][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1506.174400][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1506.174400][   T72]      ipv6_find_idev+0x102/0x170
[ 1506.174400][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1506.174400][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.174400][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.174400][   T72]      netlink_unicast+0x449/0x710
[ 1506.174400][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.174400][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.174400][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.174400][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.174400][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.174400][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.174400][   T72] 
[ 1506.175902][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1506.175902][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1506.175902][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1506.175902][   T72]      ipv6_find_idev+0x102/0x170
[ 1506.175902][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1506.175902][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1506.175902][   T72]      netlink_rcv_skb+0x130/0x360
[ 1506.175902][   T72]      netlink_unicast+0x449/0x710
[ 1506.175902][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1506.175902][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1506.175902][   T72]      ___sys_sendmsg+0xee/0x170
[ 1506.175902][   T72]      __sys_sendmsg+0xcd/0x170
[ 1506.175902][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.175902][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.175902][   T72] 
[ 1506.177551][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1506.177808][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1506.177808][   T72]      dst_init+0x84/0x4a0
[ 1506.177808][   T72]      dst_alloc+0x97/0x150
[ 1506.177808][   T72]      ip6_dst_alloc+0x23/0x90
[ 1506.177808][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1506.177808][   T72]      ip6_pol_route+0x56f/0x840
[ 1506.177808][   T72]      fib6_rule_lookup+0x227/0x600
[ 1506.177808][   T72]      ip6_route_output_flags+0x251/0x460
[ 1506.177808][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1506.177808][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1506.177808][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1506.177808][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1506.177808][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1506.177808][   T72]      __sys_connect+0x217/0x2a0
[ 1506.177808][   T72]      __x64_sys_connect+0x72/0xb0
[ 1506.177808][   T72]      do_syscall_64+0xc6/0x1e0
[ 1506.177808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1506.177808][   T72] 
[ 1516.420619][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1516.421049][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1516.421049][   T72]      netdev_get_by_index+0x5e/0x80
[ 1516.421049][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1516.421049][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1516.421049][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1516.421049][   T72]      ipv6_add_addr+0x411/0x2000
[ 1516.421049][   T72]      inet6_addr_add+0x30e/0xa40
[ 1516.421049][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1516.421049][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.421049][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.421049][   T72]      netlink_unicast+0x449/0x710
[ 1516.421049][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.421049][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.421049][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.421049][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.421049][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.421049][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.421049][   T72] 
[ 1516.423031][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1516.423031][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1516.423031][   T72]      ipv6_find_idev+0x102/0x170
[ 1516.423031][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1516.423031][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.423031][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.423031][   T72]      netlink_unicast+0x449/0x710
[ 1516.423031][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.423031][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.423031][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.423031][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.423031][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.423031][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.423031][   T72] 
[ 1516.424543][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1516.424543][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1516.424543][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1516.424543][   T72]      ipv6_find_idev+0x102/0x170
[ 1516.424543][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1516.424543][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.424543][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.424543][   T72]      netlink_unicast+0x449/0x710
[ 1516.424543][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.424543][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.424543][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.424543][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.424543][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.424543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.424543][   T72] 
[ 1516.426199][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1516.426462][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1516.426462][   T72]      netdev_get_by_index+0x5e/0x80
[ 1516.426462][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1516.426462][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1516.426462][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1516.426462][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1516.426462][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1516.426462][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1516.426462][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1516.426462][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1516.426462][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1516.426462][   T72]      vfs_write+0x9e5/0x10a0
[ 1516.426462][   T72]      ksys_write+0xf5/0x1e0
[ 1516.426462][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.426462][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.426462][   T72] 
[ 1516.428281][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1516.428281][   T72]      netdev_get_by_index+0x5e/0x80
[ 1516.428281][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1516.428281][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1516.428281][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1516.428281][   T72]      ipv6_add_addr+0x411/0x2000
[ 1516.428281][   T72]      inet6_addr_add+0x30e/0xa40
[ 1516.428281][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1516.428281][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.428281][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.428281][   T72]      netlink_unicast+0x449/0x710
[ 1516.428281][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.428281][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.428281][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.428281][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.428281][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.428281][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.428281][   T72] 
[ 1516.430238][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1516.430238][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1516.430238][   T72]      ipv6_find_idev+0x102/0x170
[ 1516.430238][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1516.430238][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.430238][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.430238][   T72]      netlink_unicast+0x449/0x710
[ 1516.430238][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.430238][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.430238][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.430238][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.430238][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.430238][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.430238][   T72] 
[ 1516.431750][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1516.431750][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1516.431750][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1516.431750][   T72]      ipv6_find_idev+0x102/0x170
[ 1516.431750][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1516.431750][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1516.431750][   T72]      netlink_rcv_skb+0x130/0x360
[ 1516.431750][   T72]      netlink_unicast+0x449/0x710
[ 1516.431750][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1516.431750][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1516.431750][   T72]      ___sys_sendmsg+0xee/0x170
[ 1516.431750][   T72]      __sys_sendmsg+0xcd/0x170
[ 1516.431750][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.431750][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.431750][   T72] 
[ 1516.433401][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1516.433637][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1516.433637][   T72]      dst_init+0x84/0x4a0
[ 1516.433637][   T72]      dst_alloc+0x97/0x150
[ 1516.433637][   T72]      ip6_dst_alloc+0x23/0x90
[ 1516.433637][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1516.433637][   T72]      ip6_pol_route+0x56f/0x840
[ 1516.433637][   T72]      fib6_rule_lookup+0x227/0x600
[ 1516.433637][   T72]      ip6_route_output_flags+0x251/0x460
[ 1516.433637][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1516.433637][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1516.433637][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1516.433637][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1516.433637][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1516.433637][   T72]      __sys_connect+0x217/0x2a0
[ 1516.433637][   T72]      __x64_sys_connect+0x72/0xb0
[ 1516.433637][   T72]      do_syscall_64+0xc6/0x1e0
[ 1516.433637][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1516.433637][   T72] 
[ 1526.684740][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1526.685132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1526.685132][   T72]      netdev_get_by_index+0x5e/0x80
[ 1526.685132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1526.685132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1526.685132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1526.685132][   T72]      ipv6_add_addr+0x411/0x2000
[ 1526.685132][   T72]      inet6_addr_add+0x30e/0xa40
[ 1526.685132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1526.685132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.685132][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.685132][   T72]      netlink_unicast+0x449/0x710
[ 1526.685132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.685132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.685132][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.685132][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.685132][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.685132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.685132][   T72] 
[ 1526.687096][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1526.687096][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1526.687096][   T72]      ipv6_find_idev+0x102/0x170
[ 1526.687096][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1526.687096][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.687096][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.687096][   T72]      netlink_unicast+0x449/0x710
[ 1526.687096][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.687096][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.687096][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.687096][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.687096][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.687096][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.687096][   T72] 
[ 1526.688606][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1526.688606][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1526.688606][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1526.688606][   T72]      ipv6_find_idev+0x102/0x170
[ 1526.688606][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1526.688606][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.688606][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.688606][   T72]      netlink_unicast+0x449/0x710
[ 1526.688606][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.688606][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.688606][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.688606][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.688606][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.688606][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.688606][   T72] 
[ 1526.690269][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1526.690536][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1526.690536][   T72]      netdev_get_by_index+0x5e/0x80
[ 1526.690536][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1526.690536][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1526.690536][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1526.690536][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1526.690536][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1526.690536][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1526.690536][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1526.690536][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1526.690536][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1526.690536][   T72]      vfs_write+0x9e5/0x10a0
[ 1526.690536][   T72]      ksys_write+0xf5/0x1e0
[ 1526.690536][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.690536][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.690536][   T72] 
[ 1526.692353][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1526.692353][   T72]      netdev_get_by_index+0x5e/0x80
[ 1526.692353][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1526.692353][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1526.692353][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1526.692353][   T72]      ipv6_add_addr+0x411/0x2000
[ 1526.692353][   T72]      inet6_addr_add+0x30e/0xa40
[ 1526.692353][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1526.692353][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.692353][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.692353][   T72]      netlink_unicast+0x449/0x710
[ 1526.692353][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.692353][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.692353][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.692353][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.692353][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.692353][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.692353][   T72] 
[ 1526.694342][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1526.694342][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1526.694342][   T72]      ipv6_find_idev+0x102/0x170
[ 1526.694342][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1526.694342][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.694342][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.694342][   T72]      netlink_unicast+0x449/0x710
[ 1526.694342][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.694342][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.694342][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.694342][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.694342][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.694342][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.694342][   T72] 
[ 1526.695848][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1526.695848][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1526.695848][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1526.695848][   T72]      ipv6_find_idev+0x102/0x170
[ 1526.695848][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1526.695848][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1526.695848][   T72]      netlink_rcv_skb+0x130/0x360
[ 1526.695848][   T72]      netlink_unicast+0x449/0x710
[ 1526.695848][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1526.695848][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1526.695848][   T72]      ___sys_sendmsg+0xee/0x170
[ 1526.695848][   T72]      __sys_sendmsg+0xcd/0x170
[ 1526.695848][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.695848][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.695848][   T72] 
[ 1526.697486][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1526.697733][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1526.697733][   T72]      dst_init+0x84/0x4a0
[ 1526.697733][   T72]      dst_alloc+0x97/0x150
[ 1526.697733][   T72]      ip6_dst_alloc+0x23/0x90
[ 1526.697733][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1526.697733][   T72]      ip6_pol_route+0x56f/0x840
[ 1526.697733][   T72]      fib6_rule_lookup+0x227/0x600
[ 1526.697733][   T72]      ip6_route_output_flags+0x251/0x460
[ 1526.697733][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1526.697733][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1526.697733][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1526.697733][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1526.697733][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1526.697733][   T72]      __sys_connect+0x217/0x2a0
[ 1526.697733][   T72]      __x64_sys_connect+0x72/0xb0
[ 1526.697733][   T72]      do_syscall_64+0xc6/0x1e0
[ 1526.697733][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1526.697733][   T72] 
[ 1536.940718][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1536.941144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1536.941144][   T72]      netdev_get_by_index+0x5e/0x80
[ 1536.941144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1536.941144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1536.941144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1536.941144][   T72]      ipv6_add_addr+0x411/0x2000
[ 1536.941144][   T72]      inet6_addr_add+0x30e/0xa40
[ 1536.941144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1536.941144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.941144][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.941144][   T72]      netlink_unicast+0x449/0x710
[ 1536.941144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.941144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.941144][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.941144][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.941144][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.941144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.941144][   T72] 
[ 1536.943181][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1536.943181][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1536.943181][   T72]      ipv6_find_idev+0x102/0x170
[ 1536.943181][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1536.943181][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.943181][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.943181][   T72]      netlink_unicast+0x449/0x710
[ 1536.943181][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.943181][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.943181][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.943181][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.943181][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.943181][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.943181][   T72] 
[ 1536.944690][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1536.944690][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1536.944690][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1536.944690][   T72]      ipv6_find_idev+0x102/0x170
[ 1536.944690][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1536.944690][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.944690][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.944690][   T72]      netlink_unicast+0x449/0x710
[ 1536.944690][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.944690][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.944690][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.944690][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.944690][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.944690][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.944690][   T72] 
[ 1536.946342][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1536.946617][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1536.946617][   T72]      netdev_get_by_index+0x5e/0x80
[ 1536.946617][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1536.946617][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1536.946617][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1536.946617][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1536.946617][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1536.946617][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1536.946617][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1536.946617][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1536.946617][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1536.946617][   T72]      vfs_write+0x9e5/0x10a0
[ 1536.946617][   T72]      ksys_write+0xf5/0x1e0
[ 1536.946617][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.946617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.946617][   T72] 
[ 1536.948420][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1536.948420][   T72]      netdev_get_by_index+0x5e/0x80
[ 1536.948420][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1536.948420][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1536.948420][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1536.948420][   T72]      ipv6_add_addr+0x411/0x2000
[ 1536.948420][   T72]      inet6_addr_add+0x30e/0xa40
[ 1536.948420][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1536.948420][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.948420][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.948420][   T72]      netlink_unicast+0x449/0x710
[ 1536.948420][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.948420][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.948420][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.948420][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.948420][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.948420][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.948420][   T72] 
[ 1536.950367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1536.950367][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1536.950367][   T72]      ipv6_find_idev+0x102/0x170
[ 1536.950367][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1536.950367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.950367][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.950367][   T72]      netlink_unicast+0x449/0x710
[ 1536.950367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.950367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.950367][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.950367][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.950367][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.950367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.950367][   T72] 
[ 1536.951960][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1536.951960][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1536.951960][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1536.951960][   T72]      ipv6_find_idev+0x102/0x170
[ 1536.951960][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1536.951960][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1536.951960][   T72]      netlink_rcv_skb+0x130/0x360
[ 1536.951960][   T72]      netlink_unicast+0x449/0x710
[ 1536.951960][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1536.951960][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1536.951960][   T72]      ___sys_sendmsg+0xee/0x170
[ 1536.951960][   T72]      __sys_sendmsg+0xcd/0x170
[ 1536.951960][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.951960][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.951960][   T72] 
[ 1536.953621][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1536.953853][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1536.953853][   T72]      dst_init+0x84/0x4a0
[ 1536.953853][   T72]      dst_alloc+0x97/0x150
[ 1536.953853][   T72]      ip6_dst_alloc+0x23/0x90
[ 1536.953853][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1536.953853][   T72]      ip6_pol_route+0x56f/0x840
[ 1536.953853][   T72]      fib6_rule_lookup+0x227/0x600
[ 1536.953853][   T72]      ip6_route_output_flags+0x251/0x460
[ 1536.953853][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1536.953853][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1536.953853][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1536.953853][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1536.953853][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1536.953853][   T72]      __sys_connect+0x217/0x2a0
[ 1536.953853][   T72]      __x64_sys_connect+0x72/0xb0
[ 1536.953853][   T72]      do_syscall_64+0xc6/0x1e0
[ 1536.953853][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1536.953853][   T72] 
[ 1546.972699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1546.973090][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1546.973090][   T72]      netdev_get_by_index+0x5e/0x80
[ 1546.973090][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1546.973090][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1546.973090][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1546.973090][   T72]      ipv6_add_addr+0x411/0x2000
[ 1546.973090][   T72]      inet6_addr_add+0x30e/0xa40
[ 1546.973090][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1546.973090][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.973090][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.973090][   T72]      netlink_unicast+0x449/0x710
[ 1546.973090][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.973090][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.973090][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.973090][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.973090][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.973090][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.973090][   T72] 
[ 1546.975067][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1546.975067][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1546.975067][   T72]      ipv6_find_idev+0x102/0x170
[ 1546.975067][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1546.975067][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.975067][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.975067][   T72]      netlink_unicast+0x449/0x710
[ 1546.975067][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.975067][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.975067][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.975067][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.975067][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.975067][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.975067][   T72] 
[ 1546.976577][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1546.976577][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1546.976577][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1546.976577][   T72]      ipv6_find_idev+0x102/0x170
[ 1546.976577][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1546.976577][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.976577][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.976577][   T72]      netlink_unicast+0x449/0x710
[ 1546.976577][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.976577][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.976577][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.976577][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.976577][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.976577][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.976577][   T72] 
[ 1546.978244][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1546.978510][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1546.978510][   T72]      netdev_get_by_index+0x5e/0x80
[ 1546.978510][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1546.978510][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1546.978510][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1546.978510][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1546.978510][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1546.978510][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1546.978510][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1546.978510][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1546.978510][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1546.978510][   T72]      vfs_write+0x9e5/0x10a0
[ 1546.978510][   T72]      ksys_write+0xf5/0x1e0
[ 1546.978510][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.978510][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.978510][   T72] 
[ 1546.980327][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1546.980327][   T72]      netdev_get_by_index+0x5e/0x80
[ 1546.980327][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1546.980327][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1546.980327][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1546.980327][   T72]      ipv6_add_addr+0x411/0x2000
[ 1546.980327][   T72]      inet6_addr_add+0x30e/0xa40
[ 1546.980327][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1546.980327][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.980327][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.980327][   T72]      netlink_unicast+0x449/0x710
[ 1546.980327][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.980327][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.980327][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.980327][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.980327][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.980327][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.980327][   T72] 
[ 1546.982283][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1546.982283][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1546.982283][   T72]      ipv6_find_idev+0x102/0x170
[ 1546.982283][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1546.982283][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.982283][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.982283][   T72]      netlink_unicast+0x449/0x710
[ 1546.982283][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.982283][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.982283][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.982283][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.982283][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.982283][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.982283][   T72] 
[ 1546.983792][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1546.983792][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1546.983792][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1546.983792][   T72]      ipv6_find_idev+0x102/0x170
[ 1546.983792][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1546.983792][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1546.983792][   T72]      netlink_rcv_skb+0x130/0x360
[ 1546.983792][   T72]      netlink_unicast+0x449/0x710
[ 1546.983792][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1546.983792][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1546.983792][   T72]      ___sys_sendmsg+0xee/0x170
[ 1546.983792][   T72]      __sys_sendmsg+0xcd/0x170
[ 1546.983792][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.983792][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.983792][   T72] 
[ 1546.985541][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1546.985792][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1546.985792][   T72]      dst_init+0x84/0x4a0
[ 1546.985792][   T72]      dst_alloc+0x97/0x150
[ 1546.985792][   T72]      ip6_dst_alloc+0x23/0x90
[ 1546.985792][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1546.985792][   T72]      ip6_pol_route+0x56f/0x840
[ 1546.985792][   T72]      fib6_rule_lookup+0x227/0x600
[ 1546.985792][   T72]      ip6_route_output_flags+0x251/0x460
[ 1546.985792][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1546.985792][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1546.985792][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1546.985792][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1546.985792][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1546.985792][   T72]      __sys_connect+0x217/0x2a0
[ 1546.985792][   T72]      __x64_sys_connect+0x72/0xb0
[ 1546.985792][   T72]      do_syscall_64+0xc6/0x1e0
[ 1546.985792][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1546.985792][   T72] 
[ 1557.092725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1557.093139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1557.093139][   T72]      netdev_get_by_index+0x5e/0x80
[ 1557.093139][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1557.093139][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1557.093139][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1557.093139][   T72]      ipv6_add_addr+0x411/0x2000
[ 1557.093139][   T72]      inet6_addr_add+0x30e/0xa40
[ 1557.093139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1557.093139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.093139][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.093139][   T72]      netlink_unicast+0x449/0x710
[ 1557.093139][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.093139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.093139][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.093139][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.093139][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.093139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.093139][   T72] 
[ 1557.095115][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1557.095115][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1557.095115][   T72]      ipv6_find_idev+0x102/0x170
[ 1557.095115][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1557.095115][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.095115][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.095115][   T72]      netlink_unicast+0x449/0x710
[ 1557.095115][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.095115][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.095115][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.095115][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.095115][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.095115][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.095115][   T72] 
[ 1557.096625][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1557.096625][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1557.096625][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1557.096625][   T72]      ipv6_find_idev+0x102/0x170
[ 1557.096625][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1557.096625][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.096625][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.096625][   T72]      netlink_unicast+0x449/0x710
[ 1557.096625][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.096625][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.096625][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.096625][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.096625][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.096625][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.096625][   T72] 
[ 1557.098271][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1557.098539][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1557.098539][   T72]      netdev_get_by_index+0x5e/0x80
[ 1557.098539][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1557.098539][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1557.098539][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1557.098539][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1557.098539][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1557.098539][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1557.098539][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1557.098539][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1557.098539][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1557.098539][   T72]      vfs_write+0x9e5/0x10a0
[ 1557.098539][   T72]      ksys_write+0xf5/0x1e0
[ 1557.098539][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.098539][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.098539][   T72] 
[ 1557.100354][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1557.100354][   T72]      netdev_get_by_index+0x5e/0x80
[ 1557.100354][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1557.100354][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1557.100354][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1557.100354][   T72]      ipv6_add_addr+0x411/0x2000
[ 1557.100354][   T72]      inet6_addr_add+0x30e/0xa40
[ 1557.100354][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1557.100354][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.100354][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.100354][   T72]      netlink_unicast+0x449/0x710
[ 1557.100354][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.100354][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.100354][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.100354][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.100354][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.100354][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.100354][   T72] 
[ 1557.102312][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1557.102312][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1557.102312][   T72]      ipv6_find_idev+0x102/0x170
[ 1557.102312][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1557.102312][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.102312][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.102312][   T72]      netlink_unicast+0x449/0x710
[ 1557.102312][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.102312][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.102312][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.102312][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.102312][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.102312][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.102312][   T72] 
[ 1557.103832][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1557.103832][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1557.103832][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1557.103832][   T72]      ipv6_find_idev+0x102/0x170
[ 1557.103832][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1557.103832][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1557.103832][   T72]      netlink_rcv_skb+0x130/0x360
[ 1557.103832][   T72]      netlink_unicast+0x449/0x710
[ 1557.103832][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1557.103832][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1557.103832][   T72]      ___sys_sendmsg+0xee/0x170
[ 1557.103832][   T72]      __sys_sendmsg+0xcd/0x170
[ 1557.103832][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.103832][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.103832][   T72] 
[ 1557.105487][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1557.105734][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1557.105734][   T72]      dst_init+0x84/0x4a0
[ 1557.105734][   T72]      dst_alloc+0x97/0x150
[ 1557.105734][   T72]      ip6_dst_alloc+0x23/0x90
[ 1557.105734][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1557.105734][   T72]      ip6_pol_route+0x56f/0x840
[ 1557.105734][   T72]      fib6_rule_lookup+0x227/0x600
[ 1557.105734][   T72]      ip6_route_output_flags+0x251/0x460
[ 1557.105734][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1557.105734][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1557.105734][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1557.105734][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1557.105734][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1557.105734][   T72]      __sys_connect+0x217/0x2a0
[ 1557.105734][   T72]      __x64_sys_connect+0x72/0xb0
[ 1557.105734][   T72]      do_syscall_64+0xc6/0x1e0
[ 1557.105734][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1557.105734][   T72] 
[ 1567.348633][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1567.349069][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1567.349069][   T72]      netdev_get_by_index+0x5e/0x80
[ 1567.349069][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1567.349069][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1567.349069][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1567.349069][   T72]      ipv6_add_addr+0x411/0x2000
[ 1567.349069][   T72]      inet6_addr_add+0x30e/0xa40
[ 1567.349069][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1567.349069][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.349069][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.349069][   T72]      netlink_unicast+0x449/0x710
[ 1567.349069][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.349069][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.349069][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.349069][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.349069][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.349069][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.349069][   T72] 
[ 1567.351047][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1567.351047][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1567.351047][   T72]      ipv6_find_idev+0x102/0x170
[ 1567.351047][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1567.351047][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.351047][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.351047][   T72]      netlink_unicast+0x449/0x710
[ 1567.351047][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.351047][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.351047][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.351047][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.351047][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.351047][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.351047][   T72] 
[ 1567.352563][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1567.352563][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1567.352563][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1567.352563][   T72]      ipv6_find_idev+0x102/0x170
[ 1567.352563][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1567.352563][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.352563][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.352563][   T72]      netlink_unicast+0x449/0x710
[ 1567.352563][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.352563][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.352563][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.352563][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.352563][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.352563][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.352563][   T72] 
[ 1567.354228][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1567.354495][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1567.354495][   T72]      netdev_get_by_index+0x5e/0x80
[ 1567.354495][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1567.354495][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1567.354495][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1567.354495][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1567.354495][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1567.354495][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1567.354495][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1567.354495][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1567.354495][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1567.354495][   T72]      vfs_write+0x9e5/0x10a0
[ 1567.354495][   T72]      ksys_write+0xf5/0x1e0
[ 1567.354495][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.354495][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.354495][   T72] 
[ 1567.356318][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1567.356318][   T72]      netdev_get_by_index+0x5e/0x80
[ 1567.356318][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1567.356318][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1567.356318][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1567.356318][   T72]      ipv6_add_addr+0x411/0x2000
[ 1567.356318][   T72]      inet6_addr_add+0x30e/0xa40
[ 1567.356318][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1567.356318][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.356318][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.356318][   T72]      netlink_unicast+0x449/0x710
[ 1567.356318][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.356318][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.356318][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.356318][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.356318][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.356318][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.356318][   T72] 
[ 1567.358284][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1567.358284][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1567.358284][   T72]      ipv6_find_idev+0x102/0x170
[ 1567.358284][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1567.358284][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.358284][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.358284][   T72]      netlink_unicast+0x449/0x710
[ 1567.358284][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.358284][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.358284][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.358284][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.358284][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.358284][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.358284][   T72] 
[ 1567.359800][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1567.359800][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1567.359800][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1567.359800][   T72]      ipv6_find_idev+0x102/0x170
[ 1567.359800][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1567.359800][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1567.359800][   T72]      netlink_rcv_skb+0x130/0x360
[ 1567.359800][   T72]      netlink_unicast+0x449/0x710
[ 1567.359800][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1567.359800][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1567.359800][   T72]      ___sys_sendmsg+0xee/0x170
[ 1567.359800][   T72]      __sys_sendmsg+0xcd/0x170
[ 1567.359800][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.359800][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.359800][   T72] 
[ 1567.361456][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1567.361700][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1567.361700][   T72]      dst_init+0x84/0x4a0
[ 1567.361700][   T72]      dst_alloc+0x97/0x150
[ 1567.361700][   T72]      ip6_dst_alloc+0x23/0x90
[ 1567.361700][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1567.361700][   T72]      ip6_pol_route+0x56f/0x840
[ 1567.361700][   T72]      fib6_rule_lookup+0x227/0x600
[ 1567.361700][   T72]      ip6_route_output_flags+0x251/0x460
[ 1567.361700][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1567.361700][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1567.361700][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1567.361700][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1567.361700][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1567.361700][   T72]      __sys_connect+0x217/0x2a0
[ 1567.361700][   T72]      __x64_sys_connect+0x72/0xb0
[ 1567.361700][   T72]      do_syscall_64+0xc6/0x1e0
[ 1567.361700][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1567.361700][   T72] 
[ 1577.604703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1577.605142][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1577.605142][   T72]      netdev_get_by_index+0x5e/0x80
[ 1577.605142][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1577.605142][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1577.605142][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1577.605142][   T72]      ipv6_add_addr+0x411/0x2000
[ 1577.605142][   T72]      inet6_addr_add+0x30e/0xa40
[ 1577.605142][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1577.605142][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.605142][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.605142][   T72]      netlink_unicast+0x449/0x710
[ 1577.605142][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.605142][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.605142][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.605142][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.605142][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.605142][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.605142][   T72] 
[ 1577.607115][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1577.607115][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1577.607115][   T72]      ipv6_find_idev+0x102/0x170
[ 1577.607115][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1577.607115][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.607115][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.607115][   T72]      netlink_unicast+0x449/0x710
[ 1577.607115][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.607115][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.607115][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.607115][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.607115][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.607115][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.607115][   T72] 
[ 1577.608635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1577.608635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1577.608635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1577.608635][   T72]      ipv6_find_idev+0x102/0x170
[ 1577.608635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1577.608635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.608635][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.608635][   T72]      netlink_unicast+0x449/0x710
[ 1577.608635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.608635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.608635][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.608635][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.608635][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.608635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.608635][   T72] 
[ 1577.610300][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1577.610572][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1577.610572][   T72]      netdev_get_by_index+0x5e/0x80
[ 1577.610572][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1577.610572][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1577.610572][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1577.610572][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1577.610572][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1577.610572][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1577.610572][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1577.610572][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1577.610572][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1577.610572][   T72]      vfs_write+0x9e5/0x10a0
[ 1577.610572][   T72]      ksys_write+0xf5/0x1e0
[ 1577.610572][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.610572][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.610572][   T72] 
[ 1577.612389][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1577.612389][   T72]      netdev_get_by_index+0x5e/0x80
[ 1577.612389][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1577.612389][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1577.612389][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1577.612389][   T72]      ipv6_add_addr+0x411/0x2000
[ 1577.612389][   T72]      inet6_addr_add+0x30e/0xa40
[ 1577.612389][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1577.612389][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.612389][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.612389][   T72]      netlink_unicast+0x449/0x710
[ 1577.612389][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.612389][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.612389][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.612389][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.612389][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.612389][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.612389][   T72] 
[ 1577.614368][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1577.614368][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1577.614368][   T72]      ipv6_find_idev+0x102/0x170
[ 1577.614368][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1577.614368][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.614368][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.614368][   T72]      netlink_unicast+0x449/0x710
[ 1577.614368][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.614368][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.614368][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.614368][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.614368][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.614368][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.614368][   T72] 
[ 1577.615881][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1577.615881][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1577.615881][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1577.615881][   T72]      ipv6_find_idev+0x102/0x170
[ 1577.615881][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1577.615881][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1577.615881][   T72]      netlink_rcv_skb+0x130/0x360
[ 1577.615881][   T72]      netlink_unicast+0x449/0x710
[ 1577.615881][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1577.615881][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1577.615881][   T72]      ___sys_sendmsg+0xee/0x170
[ 1577.615881][   T72]      __sys_sendmsg+0xcd/0x170
[ 1577.615881][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.615881][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.615881][   T72] 
[ 1577.617794][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1577.618030][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1577.618030][   T72]      dst_init+0x84/0x4a0
[ 1577.618030][   T72]      dst_alloc+0x97/0x150
[ 1577.618030][   T72]      ip6_dst_alloc+0x23/0x90
[ 1577.618030][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1577.618030][   T72]      ip6_pol_route+0x56f/0x840
[ 1577.618030][   T72]      fib6_rule_lookup+0x227/0x600
[ 1577.618030][   T72]      ip6_route_output_flags+0x251/0x460
[ 1577.618030][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1577.618030][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1577.618030][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1577.618030][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1577.618030][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1577.618030][   T72]      __sys_connect+0x217/0x2a0
[ 1577.618030][   T72]      __x64_sys_connect+0x72/0xb0
[ 1577.618030][   T72]      do_syscall_64+0xc6/0x1e0
[ 1577.618030][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1577.618030][   T72] 
[ 1587.860714][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1587.861153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1587.861153][   T72]      netdev_get_by_index+0x5e/0x80
[ 1587.861153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1587.861153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1587.861153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1587.861153][   T72]      ipv6_add_addr+0x411/0x2000
[ 1587.861153][   T72]      inet6_addr_add+0x30e/0xa40
[ 1587.861153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1587.861153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.861153][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.861153][   T72]      netlink_unicast+0x449/0x710
[ 1587.861153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.861153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.861153][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.861153][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.861153][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.861153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.861153][   T72] 
[ 1587.863165][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1587.863165][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1587.863165][   T72]      ipv6_find_idev+0x102/0x170
[ 1587.863165][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1587.863165][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.863165][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.863165][   T72]      netlink_unicast+0x449/0x710
[ 1587.863165][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.863165][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.863165][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.863165][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.863165][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.863165][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.863165][   T72] 
[ 1587.864697][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1587.864697][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1587.864697][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1587.864697][   T72]      ipv6_find_idev+0x102/0x170
[ 1587.864697][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1587.864697][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.864697][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.864697][   T72]      netlink_unicast+0x449/0x710
[ 1587.864697][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.864697][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.864697][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.864697][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.864697][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.864697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.864697][   T72] 
[ 1587.866353][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1587.866622][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1587.866622][   T72]      netdev_get_by_index+0x5e/0x80
[ 1587.866622][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1587.866622][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1587.866622][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1587.866622][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1587.866622][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1587.866622][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1587.866622][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1587.866622][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1587.866622][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1587.866622][   T72]      vfs_write+0x9e5/0x10a0
[ 1587.866622][   T72]      ksys_write+0xf5/0x1e0
[ 1587.866622][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.866622][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.866622][   T72] 
[ 1587.868434][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1587.868434][   T72]      netdev_get_by_index+0x5e/0x80
[ 1587.868434][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1587.868434][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1587.868434][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1587.868434][   T72]      ipv6_add_addr+0x411/0x2000
[ 1587.868434][   T72]      inet6_addr_add+0x30e/0xa40
[ 1587.868434][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1587.868434][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.868434][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.868434][   T72]      netlink_unicast+0x449/0x710
[ 1587.868434][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.868434][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.868434][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.868434][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.868434][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.868434][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.868434][   T72] 
[ 1587.870389][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1587.870389][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1587.870389][   T72]      ipv6_find_idev+0x102/0x170
[ 1587.870389][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1587.870389][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.870389][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.870389][   T72]      netlink_unicast+0x449/0x710
[ 1587.870389][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.870389][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.870389][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.870389][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.870389][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.870389][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.870389][   T72] 
[ 1587.871895][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1587.871895][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1587.871895][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1587.871895][   T72]      ipv6_find_idev+0x102/0x170
[ 1587.871895][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1587.871895][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1587.871895][   T72]      netlink_rcv_skb+0x130/0x360
[ 1587.871895][   T72]      netlink_unicast+0x449/0x710
[ 1587.871895][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1587.871895][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1587.871895][   T72]      ___sys_sendmsg+0xee/0x170
[ 1587.871895][   T72]      __sys_sendmsg+0xcd/0x170
[ 1587.871895][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.871895][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.871895][   T72] 
[ 1587.873564][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1587.873810][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1587.873810][   T72]      dst_init+0x84/0x4a0
[ 1587.873810][   T72]      dst_alloc+0x97/0x150
[ 1587.873810][   T72]      ip6_dst_alloc+0x23/0x90
[ 1587.873810][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1587.873810][   T72]      ip6_pol_route+0x56f/0x840
[ 1587.873810][   T72]      fib6_rule_lookup+0x227/0x600
[ 1587.873810][   T72]      ip6_route_output_flags+0x251/0x460
[ 1587.873810][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1587.873810][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1587.873810][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1587.873810][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1587.873810][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1587.873810][   T72]      __sys_connect+0x217/0x2a0
[ 1587.873810][   T72]      __x64_sys_connect+0x72/0xb0
[ 1587.873810][   T72]      do_syscall_64+0xc6/0x1e0
[ 1587.873810][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1587.873810][   T72] 
[ 1597.956723][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1597.957188][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1597.957188][   T72]      netdev_get_by_index+0x5e/0x80
[ 1597.957188][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1597.957188][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1597.957188][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1597.957188][   T72]      ipv6_add_addr+0x411/0x2000
[ 1597.957188][   T72]      inet6_addr_add+0x30e/0xa40
[ 1597.957188][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1597.957188][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.957188][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.957188][   T72]      netlink_unicast+0x449/0x710
[ 1597.957188][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.957188][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.957188][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.957188][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.957188][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.957188][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.957188][   T72] 
[ 1597.959193][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1597.959193][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1597.959193][   T72]      ipv6_find_idev+0x102/0x170
[ 1597.959193][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1597.959193][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.959193][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.959193][   T72]      netlink_unicast+0x449/0x710
[ 1597.959193][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.959193][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.959193][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.959193][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.959193][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.959193][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.959193][   T72] 
[ 1597.960727][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1597.960727][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1597.960727][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1597.960727][   T72]      ipv6_find_idev+0x102/0x170
[ 1597.960727][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1597.960727][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.960727][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.960727][   T72]      netlink_unicast+0x449/0x710
[ 1597.960727][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.960727][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.960727][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.960727][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.960727][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.960727][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.960727][   T72] 
[ 1597.962413][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1597.962704][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1597.962704][   T72]      netdev_get_by_index+0x5e/0x80
[ 1597.962704][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1597.962704][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1597.962704][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1597.962704][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1597.962704][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1597.962704][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1597.962704][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1597.962704][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1597.962704][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1597.962704][   T72]      vfs_write+0x9e5/0x10a0
[ 1597.962704][   T72]      ksys_write+0xf5/0x1e0
[ 1597.962704][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.962704][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.962704][   T72] 
[ 1597.964543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1597.964543][   T72]      netdev_get_by_index+0x5e/0x80
[ 1597.964543][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1597.964543][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1597.964543][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1597.964543][   T72]      ipv6_add_addr+0x411/0x2000
[ 1597.964543][   T72]      inet6_addr_add+0x30e/0xa40
[ 1597.964543][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1597.964543][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.964543][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.964543][   T72]      netlink_unicast+0x449/0x710
[ 1597.964543][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.964543][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.964543][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.964543][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.964543][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.964543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.964543][   T72] 
[ 1597.966524][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1597.966524][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1597.966524][   T72]      ipv6_find_idev+0x102/0x170
[ 1597.966524][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1597.966524][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.966524][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.966524][   T72]      netlink_unicast+0x449/0x710
[ 1597.966524][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.966524][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.966524][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.966524][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.966524][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.966524][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.966524][   T72] 
[ 1597.968065][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1597.968065][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1597.968065][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1597.968065][   T72]      ipv6_find_idev+0x102/0x170
[ 1597.968065][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1597.968065][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1597.968065][   T72]      netlink_rcv_skb+0x130/0x360
[ 1597.968065][   T72]      netlink_unicast+0x449/0x710
[ 1597.968065][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1597.968065][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1597.968065][   T72]      ___sys_sendmsg+0xee/0x170
[ 1597.968065][   T72]      __sys_sendmsg+0xcd/0x170
[ 1597.968065][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.968065][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.968065][   T72] 
[ 1597.969738][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1597.969979][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1597.969979][   T72]      dst_init+0x84/0x4a0
[ 1597.969979][   T72]      dst_alloc+0x97/0x150
[ 1597.969979][   T72]      ip6_dst_alloc+0x23/0x90
[ 1597.969979][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1597.969979][   T72]      ip6_pol_route+0x56f/0x840
[ 1597.969979][   T72]      fib6_rule_lookup+0x227/0x600
[ 1597.969979][   T72]      ip6_route_output_flags+0x251/0x460
[ 1597.969979][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1597.969979][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1597.969979][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1597.969979][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1597.969979][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1597.969979][   T72]      __sys_connect+0x217/0x2a0
[ 1597.969979][   T72]      __x64_sys_connect+0x72/0xb0
[ 1597.969979][   T72]      do_syscall_64+0xc6/0x1e0
[ 1597.969979][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1597.969979][   T72] 
[ 1598.756736][   T42] INFO: task modprobe:1562 blocked for more than 1105 seconds.
[ 1598.757039][   T42]       Not tainted 6.8.0-virtme #1
[ 1598.757156][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1598.757351][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1598.757620][   T42] Call Trace:
[ 1598.757717][   T42]  <TASK>
[ 1598.757791][   T42]  __schedule+0x705/0x1ac0
[ 1598.757934][   T42]  ? __pfx___schedule+0x10/0x10
[ 1598.758057][   T42]  ? schedule+0x1a5/0x210
[ 1598.758153][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1598.758279][   T42]  ? mark_lock+0x38/0x3e0
[ 1598.758372][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1598.758498][   T42]  ? schedule+0x1a5/0x210
[ 1598.758611][   T42]  schedule+0xdf/0x210
[ 1598.758708][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1598.758832][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1598.758959][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1598.759111][   T42]  ? kasan_save_stack+0x34/0x50
[ 1598.759233][   T42]  ? kasan_save_stack+0x24/0x50
[ 1598.759355][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1598.759487][   T42]  ? lock_acquire+0x1c1/0x220
[ 1598.759619][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1598.759749][   T42]  down_write+0x1c9/0x200
[ 1598.759846][   T42]  ? __pfx_down_write+0x10/0x10
[ 1598.759968][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1598.760095][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1598.760295][   T42]  register_pernet_subsys+0x1a/0x50
[ 1598.760418][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1598.760604][   T42]  do_one_initcall+0xc8/0x3f0
[ 1598.760729][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1598.760858][   T42]  ? __create_object+0x5e/0xb0
[ 1598.760984][   T42]  ? kasan_unpoison+0x27/0x60
[ 1598.761114][   T42]  do_init_module+0x233/0x740
[ 1598.761245][   T42]  load_module+0x16b5/0x2350
[ 1598.761379][   T42]  ? __pfx_load_module+0x10/0x10
[ 1598.761502][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1598.761648][   T42]  ? kernel_read_file+0x300/0x520
[ 1598.761785][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1598.761919][   T42]  ? init_module_from_file+0xd2/0x130
[ 1598.762043][   T42]  init_module_from_file+0xd2/0x130
[ 1598.762164][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1598.762315][   T42]  ? __lock_release+0x103/0x460
[ 1598.762438][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1598.762570][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1598.762711][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1598.762837][   T42]  idempotent_init_module+0x342/0x620
[ 1598.762965][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1598.763135][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1598.763259][   T42]  do_syscall_64+0xc6/0x1e0
[ 1598.763384][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1598.763539][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1598.763674][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1598.763858][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1598.764040][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1598.764219][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1598.764401][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1598.764580][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1598.764784][   T42]  </TASK>
[ 1598.764879][   T42] 
[ 1598.764879][   T42] Showing all locks held in the system:
[ 1598.765056][   T42] 1 lock held by khungtaskd/42:
[ 1598.765175][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1598.765395][   T42] 3 locks held by kworker/u16:1/72:
[ 1598.765511][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1598.765775][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1598.765995][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1598.766212][   T42] 2 locks held by kworker/u20:3/1240:
[ 1598.766328][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1598.766570][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1598.766859][   T42] 1 lock held by modprobe/1562:
[ 1598.766975][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1598.767219][   T42] 
[ 1598.767279][   T42] =============================================
[ 1598.767279][   T42] 
[ 1608.212720][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1608.213122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1608.213122][   T72]      netdev_get_by_index+0x5e/0x80
[ 1608.213122][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1608.213122][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1608.213122][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1608.213122][   T72]      ipv6_add_addr+0x411/0x2000
[ 1608.213122][   T72]      inet6_addr_add+0x30e/0xa40
[ 1608.213122][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1608.213122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.213122][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.213122][   T72]      netlink_unicast+0x449/0x710
[ 1608.213122][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.213122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.213122][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.213122][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.213122][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.213122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.213122][   T72] 
[ 1608.215126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1608.215126][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1608.215126][   T72]      ipv6_find_idev+0x102/0x170
[ 1608.215126][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1608.215126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.215126][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.215126][   T72]      netlink_unicast+0x449/0x710
[ 1608.215126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.215126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.215126][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.215126][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.215126][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.215126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.215126][   T72] 
[ 1608.216671][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1608.216671][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1608.216671][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1608.216671][   T72]      ipv6_find_idev+0x102/0x170
[ 1608.216671][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1608.216671][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.216671][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.216671][   T72]      netlink_unicast+0x449/0x710
[ 1608.216671][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.216671][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.216671][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.216671][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.216671][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.216671][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.216671][   T72] 
[ 1608.218363][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1608.218639][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1608.218639][   T72]      netdev_get_by_index+0x5e/0x80
[ 1608.218639][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1608.218639][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1608.218639][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1608.218639][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1608.218639][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1608.218639][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1608.218639][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1608.218639][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1608.218639][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1608.218639][   T72]      vfs_write+0x9e5/0x10a0
[ 1608.218639][   T72]      ksys_write+0xf5/0x1e0
[ 1608.218639][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.218639][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.218639][   T72] 
[ 1608.220482][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1608.220482][   T72]      netdev_get_by_index+0x5e/0x80
[ 1608.220482][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1608.220482][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1608.220482][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1608.220482][   T72]      ipv6_add_addr+0x411/0x2000
[ 1608.220482][   T72]      inet6_addr_add+0x30e/0xa40
[ 1608.220482][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1608.220482][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.220482][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.220482][   T72]      netlink_unicast+0x449/0x710
[ 1608.220482][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.220482][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.220482][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.220482][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.220482][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.220482][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.220482][   T72] 
[ 1608.222460][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1608.222460][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1608.222460][   T72]      ipv6_find_idev+0x102/0x170
[ 1608.222460][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1608.222460][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.222460][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.222460][   T72]      netlink_unicast+0x449/0x710
[ 1608.222460][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.222460][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.222460][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.222460][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.222460][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.222460][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.222460][   T72] 
[ 1608.223996][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1608.223996][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1608.223996][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1608.223996][   T72]      ipv6_find_idev+0x102/0x170
[ 1608.223996][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1608.223996][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1608.223996][   T72]      netlink_rcv_skb+0x130/0x360
[ 1608.223996][   T72]      netlink_unicast+0x449/0x710
[ 1608.223996][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1608.223996][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1608.223996][   T72]      ___sys_sendmsg+0xee/0x170
[ 1608.223996][   T72]      __sys_sendmsg+0xcd/0x170
[ 1608.223996][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.223996][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.223996][   T72] 
[ 1608.225676][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1608.225932][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1608.225932][   T72]      dst_init+0x84/0x4a0
[ 1608.225932][   T72]      dst_alloc+0x97/0x150
[ 1608.225932][   T72]      ip6_dst_alloc+0x23/0x90
[ 1608.225932][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1608.225932][   T72]      ip6_pol_route+0x56f/0x840
[ 1608.225932][   T72]      fib6_rule_lookup+0x227/0x600
[ 1608.225932][   T72]      ip6_route_output_flags+0x251/0x460
[ 1608.225932][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1608.225932][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1608.225932][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1608.225932][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1608.225932][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1608.225932][   T72]      __sys_connect+0x217/0x2a0
[ 1608.225932][   T72]      __x64_sys_connect+0x72/0xb0
[ 1608.225932][   T72]      do_syscall_64+0xc6/0x1e0
[ 1608.225932][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1608.225932][   T72] 
[ 1618.260698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1618.261148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1618.261148][   T72]      netdev_get_by_index+0x5e/0x80
[ 1618.261148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1618.261148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1618.261148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1618.261148][   T72]      ipv6_add_addr+0x411/0x2000
[ 1618.261148][   T72]      inet6_addr_add+0x30e/0xa40
[ 1618.261148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1618.261148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.261148][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.261148][   T72]      netlink_unicast+0x449/0x710
[ 1618.261148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.261148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.261148][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.261148][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.261148][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.261148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.261148][   T72] 
[ 1618.263129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1618.263129][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1618.263129][   T72]      ipv6_find_idev+0x102/0x170
[ 1618.263129][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1618.263129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.263129][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.263129][   T72]      netlink_unicast+0x449/0x710
[ 1618.263129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.263129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.263129][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.263129][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.263129][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.263129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.263129][   T72] 
[ 1618.264637][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1618.264637][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1618.264637][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1618.264637][   T72]      ipv6_find_idev+0x102/0x170
[ 1618.264637][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1618.264637][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.264637][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.264637][   T72]      netlink_unicast+0x449/0x710
[ 1618.264637][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.264637][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.264637][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.264637][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.264637][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.264637][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.264637][   T72] 
[ 1618.266291][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1618.266563][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1618.266563][   T72]      netdev_get_by_index+0x5e/0x80
[ 1618.266563][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1618.266563][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1618.266563][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1618.266563][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1618.266563][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1618.266563][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1618.266563][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1618.266563][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1618.266563][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1618.266563][   T72]      vfs_write+0x9e5/0x10a0
[ 1618.266563][   T72]      ksys_write+0xf5/0x1e0
[ 1618.266563][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.266563][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.266563][   T72] 
[ 1618.268368][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1618.268368][   T72]      netdev_get_by_index+0x5e/0x80
[ 1618.268368][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1618.268368][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1618.268368][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1618.268368][   T72]      ipv6_add_addr+0x411/0x2000
[ 1618.268368][   T72]      inet6_addr_add+0x30e/0xa40
[ 1618.268368][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1618.268368][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.268368][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.268368][   T72]      netlink_unicast+0x449/0x710
[ 1618.268368][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.268368][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.268368][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.268368][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.268368][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.268368][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.268368][   T72] 
[ 1618.270322][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1618.270322][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1618.270322][   T72]      ipv6_find_idev+0x102/0x170
[ 1618.270322][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1618.270322][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.270322][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.270322][   T72]      netlink_unicast+0x449/0x710
[ 1618.270322][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.270322][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.270322][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.270322][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.270322][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.270322][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.270322][   T72] 
[ 1618.271826][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1618.271826][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1618.271826][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1618.271826][   T72]      ipv6_find_idev+0x102/0x170
[ 1618.271826][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1618.271826][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1618.271826][   T72]      netlink_rcv_skb+0x130/0x360
[ 1618.271826][   T72]      netlink_unicast+0x449/0x710
[ 1618.271826][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1618.271826][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1618.271826][   T72]      ___sys_sendmsg+0xee/0x170
[ 1618.271826][   T72]      __sys_sendmsg+0xcd/0x170
[ 1618.271826][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.271826][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.271826][   T72] 
[ 1618.273479][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1618.273722][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1618.273722][   T72]      dst_init+0x84/0x4a0
[ 1618.273722][   T72]      dst_alloc+0x97/0x150
[ 1618.273722][   T72]      ip6_dst_alloc+0x23/0x90
[ 1618.273722][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1618.273722][   T72]      ip6_pol_route+0x56f/0x840
[ 1618.273722][   T72]      fib6_rule_lookup+0x227/0x600
[ 1618.273722][   T72]      ip6_route_output_flags+0x251/0x460
[ 1618.273722][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1618.273722][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1618.273722][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1618.273722][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1618.273722][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1618.273722][   T72]      __sys_connect+0x217/0x2a0
[ 1618.273722][   T72]      __x64_sys_connect+0x72/0xb0
[ 1618.273722][   T72]      do_syscall_64+0xc6/0x1e0
[ 1618.273722][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1618.273722][   T72] 
[ 1628.516732][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1628.517169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1628.517169][   T72]      netdev_get_by_index+0x5e/0x80
[ 1628.517169][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1628.517169][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1628.517169][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1628.517169][   T72]      ipv6_add_addr+0x411/0x2000
[ 1628.517169][   T72]      inet6_addr_add+0x30e/0xa40
[ 1628.517169][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1628.517169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.517169][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.517169][   T72]      netlink_unicast+0x449/0x710
[ 1628.517169][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.517169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.517169][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.517169][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.517169][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.517169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.517169][   T72] 
[ 1628.519144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1628.519144][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1628.519144][   T72]      ipv6_find_idev+0x102/0x170
[ 1628.519144][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1628.519144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.519144][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.519144][   T72]      netlink_unicast+0x449/0x710
[ 1628.519144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.519144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.519144][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.519144][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.519144][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.519144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.519144][   T72] 
[ 1628.520669][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1628.520669][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1628.520669][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1628.520669][   T72]      ipv6_find_idev+0x102/0x170
[ 1628.520669][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1628.520669][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.520669][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.520669][   T72]      netlink_unicast+0x449/0x710
[ 1628.520669][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.520669][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.520669][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.520669][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.520669][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.520669][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.520669][   T72] 
[ 1628.522954][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1628.523323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1628.523323][   T72]      netdev_get_by_index+0x5e/0x80
[ 1628.523323][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1628.523323][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1628.523323][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1628.523323][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1628.523323][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1628.523323][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1628.523323][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1628.523323][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1628.523323][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1628.523323][   T72]      vfs_write+0x9e5/0x10a0
[ 1628.523323][   T72]      ksys_write+0xf5/0x1e0
[ 1628.523323][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.523323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.523323][   T72] 
[ 1628.525903][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1628.525903][   T72]      netdev_get_by_index+0x5e/0x80
[ 1628.525903][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1628.525903][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1628.525903][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1628.525903][   T72]      ipv6_add_addr+0x411/0x2000
[ 1628.525903][   T72]      inet6_addr_add+0x30e/0xa40
[ 1628.525903][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1628.525903][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.525903][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.525903][   T72]      netlink_unicast+0x449/0x710
[ 1628.525903][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.525903][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.525903][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.525903][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.525903][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.525903][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.525903][   T72] 
[ 1628.528688][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1628.528688][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1628.528688][   T72]      ipv6_find_idev+0x102/0x170
[ 1628.528688][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1628.528688][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.528688][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.528688][   T72]      netlink_unicast+0x449/0x710
[ 1628.528688][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.528688][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.528688][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.528688][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.528688][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.528688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.528688][   T72] 
[ 1628.530847][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1628.530847][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1628.530847][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1628.530847][   T72]      ipv6_find_idev+0x102/0x170
[ 1628.530847][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1628.530847][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1628.530847][   T72]      netlink_rcv_skb+0x130/0x360
[ 1628.530847][   T72]      netlink_unicast+0x449/0x710
[ 1628.530847][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1628.530847][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1628.530847][   T72]      ___sys_sendmsg+0xee/0x170
[ 1628.530847][   T72]      __sys_sendmsg+0xcd/0x170
[ 1628.530847][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.530847][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.530847][   T72] 
[ 1628.533198][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1628.533504][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1628.533504][   T72]      dst_init+0x84/0x4a0
[ 1628.533504][   T72]      dst_alloc+0x97/0x150
[ 1628.533504][   T72]      ip6_dst_alloc+0x23/0x90
[ 1628.533504][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1628.533504][   T72]      ip6_pol_route+0x56f/0x840
[ 1628.533504][   T72]      fib6_rule_lookup+0x227/0x600
[ 1628.533504][   T72]      ip6_route_output_flags+0x251/0x460
[ 1628.533504][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1628.533504][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1628.533504][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1628.533504][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1628.533504][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1628.533504][   T72]      __sys_connect+0x217/0x2a0
[ 1628.533504][   T72]      __x64_sys_connect+0x72/0xb0
[ 1628.533504][   T72]      do_syscall_64+0xc6/0x1e0
[ 1628.533504][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1628.533504][   T72] 
[ 1638.772637][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1638.773072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1638.773072][   T72]      netdev_get_by_index+0x5e/0x80
[ 1638.773072][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1638.773072][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1638.773072][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1638.773072][   T72]      ipv6_add_addr+0x411/0x2000
[ 1638.773072][   T72]      inet6_addr_add+0x30e/0xa40
[ 1638.773072][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1638.773072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.773072][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.773072][   T72]      netlink_unicast+0x449/0x710
[ 1638.773072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.773072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.773072][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.773072][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.773072][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.773072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.773072][   T72] 
[ 1638.775043][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1638.775043][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1638.775043][   T72]      ipv6_find_idev+0x102/0x170
[ 1638.775043][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1638.775043][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.775043][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.775043][   T72]      netlink_unicast+0x449/0x710
[ 1638.775043][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.775043][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.775043][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.775043][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.775043][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.775043][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.775043][   T72] 
[ 1638.776553][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1638.776553][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1638.776553][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1638.776553][   T72]      ipv6_find_idev+0x102/0x170
[ 1638.776553][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1638.776553][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.776553][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.776553][   T72]      netlink_unicast+0x449/0x710
[ 1638.776553][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.776553][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.776553][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.776553][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.776553][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.776553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.776553][   T72] 
[ 1638.778208][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1638.778475][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1638.778475][   T72]      netdev_get_by_index+0x5e/0x80
[ 1638.778475][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1638.778475][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1638.778475][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1638.778475][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1638.778475][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1638.778475][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1638.778475][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1638.778475][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1638.778475][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1638.778475][   T72]      vfs_write+0x9e5/0x10a0
[ 1638.778475][   T72]      ksys_write+0xf5/0x1e0
[ 1638.778475][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.778475][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.778475][   T72] 
[ 1638.780291][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1638.780291][   T72]      netdev_get_by_index+0x5e/0x80
[ 1638.780291][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1638.780291][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1638.780291][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1638.780291][   T72]      ipv6_add_addr+0x411/0x2000
[ 1638.780291][   T72]      inet6_addr_add+0x30e/0xa40
[ 1638.780291][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1638.780291][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.780291][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.780291][   T72]      netlink_unicast+0x449/0x710
[ 1638.780291][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.780291][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.780291][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.780291][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.780291][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.780291][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.780291][   T72] 
[ 1638.782253][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1638.782253][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1638.782253][   T72]      ipv6_find_idev+0x102/0x170
[ 1638.782253][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1638.782253][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.782253][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.782253][   T72]      netlink_unicast+0x449/0x710
[ 1638.782253][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.782253][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.782253][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.782253][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.782253][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.782253][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.782253][   T72] 
[ 1638.783780][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1638.783780][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1638.783780][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1638.783780][   T72]      ipv6_find_idev+0x102/0x170
[ 1638.783780][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1638.783780][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1638.783780][   T72]      netlink_rcv_skb+0x130/0x360
[ 1638.783780][   T72]      netlink_unicast+0x449/0x710
[ 1638.783780][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1638.783780][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1638.783780][   T72]      ___sys_sendmsg+0xee/0x170
[ 1638.783780][   T72]      __sys_sendmsg+0xcd/0x170
[ 1638.783780][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.783780][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.783780][   T72] 
[ 1638.785430][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1638.785676][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1638.785676][   T72]      dst_init+0x84/0x4a0
[ 1638.785676][   T72]      dst_alloc+0x97/0x150
[ 1638.785676][   T72]      ip6_dst_alloc+0x23/0x90
[ 1638.785676][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1638.785676][   T72]      ip6_pol_route+0x56f/0x840
[ 1638.785676][   T72]      fib6_rule_lookup+0x227/0x600
[ 1638.785676][   T72]      ip6_route_output_flags+0x251/0x460
[ 1638.785676][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1638.785676][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1638.785676][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1638.785676][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1638.785676][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1638.785676][   T72]      __sys_connect+0x217/0x2a0
[ 1638.785676][   T72]      __x64_sys_connect+0x72/0xb0
[ 1638.785676][   T72]      do_syscall_64+0xc6/0x1e0
[ 1638.785676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1638.785676][   T72] 
[ 1649.028708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1649.029153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1649.029153][   T72]      netdev_get_by_index+0x5e/0x80
[ 1649.029153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1649.029153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1649.029153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1649.029153][   T72]      ipv6_add_addr+0x411/0x2000
[ 1649.029153][   T72]      inet6_addr_add+0x30e/0xa40
[ 1649.029153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1649.029153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.029153][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.029153][   T72]      netlink_unicast+0x449/0x710
[ 1649.029153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.029153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.029153][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.029153][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.029153][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.029153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.029153][   T72] 
[ 1649.031335][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1649.031335][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1649.031335][   T72]      ipv6_find_idev+0x102/0x170
[ 1649.031335][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1649.031335][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.031335][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.031335][   T72]      netlink_unicast+0x449/0x710
[ 1649.031335][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.031335][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.031335][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.031335][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.031335][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.031335][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.031335][   T72] 
[ 1649.033027][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1649.033027][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1649.033027][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1649.033027][   T72]      ipv6_find_idev+0x102/0x170
[ 1649.033027][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1649.033027][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.033027][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.033027][   T72]      netlink_unicast+0x449/0x710
[ 1649.033027][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.033027][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.033027][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.033027][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.033027][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.033027][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.033027][   T72] 
[ 1649.034817][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1649.035081][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1649.035081][   T72]      netdev_get_by_index+0x5e/0x80
[ 1649.035081][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1649.035081][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1649.035081][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1649.035081][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1649.035081][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1649.035081][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1649.035081][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1649.035081][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1649.035081][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1649.035081][   T72]      vfs_write+0x9e5/0x10a0
[ 1649.035081][   T72]      ksys_write+0xf5/0x1e0
[ 1649.035081][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.035081][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.035081][   T72] 
[ 1649.036893][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1649.036893][   T72]      netdev_get_by_index+0x5e/0x80
[ 1649.036893][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1649.036893][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1649.036893][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1649.036893][   T72]      ipv6_add_addr+0x411/0x2000
[ 1649.036893][   T72]      inet6_addr_add+0x30e/0xa40
[ 1649.036893][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1649.036893][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.036893][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.036893][   T72]      netlink_unicast+0x449/0x710
[ 1649.036893][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.036893][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.036893][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.036893][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.036893][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.036893][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.036893][   T72] 
[ 1649.038848][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1649.038848][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1649.038848][   T72]      ipv6_find_idev+0x102/0x170
[ 1649.038848][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1649.038848][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.038848][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.038848][   T72]      netlink_unicast+0x449/0x710
[ 1649.038848][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.038848][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.038848][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.038848][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.038848][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.038848][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.038848][   T72] 
[ 1649.040356][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1649.040356][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1649.040356][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1649.040356][   T72]      ipv6_find_idev+0x102/0x170
[ 1649.040356][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1649.040356][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1649.040356][   T72]      netlink_rcv_skb+0x130/0x360
[ 1649.040356][   T72]      netlink_unicast+0x449/0x710
[ 1649.040356][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1649.040356][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1649.040356][   T72]      ___sys_sendmsg+0xee/0x170
[ 1649.040356][   T72]      __sys_sendmsg+0xcd/0x170
[ 1649.040356][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.040356][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.040356][   T72] 
[ 1649.042008][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1649.042242][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1649.042242][   T72]      dst_init+0x84/0x4a0
[ 1649.042242][   T72]      dst_alloc+0x97/0x150
[ 1649.042242][   T72]      ip6_dst_alloc+0x23/0x90
[ 1649.042242][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1649.042242][   T72]      ip6_pol_route+0x56f/0x840
[ 1649.042242][   T72]      fib6_rule_lookup+0x227/0x600
[ 1649.042242][   T72]      ip6_route_output_flags+0x251/0x460
[ 1649.042242][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1649.042242][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1649.042242][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1649.042242][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1649.042242][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1649.042242][   T72]      __sys_connect+0x217/0x2a0
[ 1649.042242][   T72]      __x64_sys_connect+0x72/0xb0
[ 1649.042242][   T72]      do_syscall_64+0xc6/0x1e0
[ 1649.042242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1649.042242][   T72] 
[ 1659.284712][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1659.285143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1659.285143][   T72]      netdev_get_by_index+0x5e/0x80
[ 1659.285143][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1659.285143][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1659.285143][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1659.285143][   T72]      ipv6_add_addr+0x411/0x2000
[ 1659.285143][   T72]      inet6_addr_add+0x30e/0xa40
[ 1659.285143][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1659.285143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.285143][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.285143][   T72]      netlink_unicast+0x449/0x710
[ 1659.285143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.285143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.285143][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.285143][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.285143][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.285143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.285143][   T72] 
[ 1659.287141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1659.287141][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1659.287141][   T72]      ipv6_find_idev+0x102/0x170
[ 1659.287141][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1659.287141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.287141][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.287141][   T72]      netlink_unicast+0x449/0x710
[ 1659.287141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.287141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.287141][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.287141][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.287141][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.287141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.287141][   T72] 
[ 1659.288657][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1659.288657][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1659.288657][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1659.288657][   T72]      ipv6_find_idev+0x102/0x170
[ 1659.288657][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1659.288657][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.288657][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.288657][   T72]      netlink_unicast+0x449/0x710
[ 1659.288657][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.288657][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.288657][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.288657][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.288657][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.288657][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.288657][   T72] 
[ 1659.290309][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1659.290571][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1659.290571][   T72]      netdev_get_by_index+0x5e/0x80
[ 1659.290571][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1659.290571][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1659.290571][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1659.290571][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1659.290571][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1659.290571][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1659.290571][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1659.290571][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1659.290571][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1659.290571][   T72]      vfs_write+0x9e5/0x10a0
[ 1659.290571][   T72]      ksys_write+0xf5/0x1e0
[ 1659.290571][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.290571][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.290571][   T72] 
[ 1659.292396][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1659.292396][   T72]      netdev_get_by_index+0x5e/0x80
[ 1659.292396][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1659.292396][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1659.292396][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1659.292396][   T72]      ipv6_add_addr+0x411/0x2000
[ 1659.292396][   T72]      inet6_addr_add+0x30e/0xa40
[ 1659.292396][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1659.292396][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.292396][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.292396][   T72]      netlink_unicast+0x449/0x710
[ 1659.292396][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.292396][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.292396][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.292396][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.292396][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.292396][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.292396][   T72] 
[ 1659.294346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1659.294346][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1659.294346][   T72]      ipv6_find_idev+0x102/0x170
[ 1659.294346][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1659.294346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.294346][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.294346][   T72]      netlink_unicast+0x449/0x710
[ 1659.294346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.294346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.294346][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.294346][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.294346][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.294346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.294346][   T72] 
[ 1659.295847][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1659.295847][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1659.295847][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1659.295847][   T72]      ipv6_find_idev+0x102/0x170
[ 1659.295847][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1659.295847][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1659.295847][   T72]      netlink_rcv_skb+0x130/0x360
[ 1659.295847][   T72]      netlink_unicast+0x449/0x710
[ 1659.295847][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1659.295847][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1659.295847][   T72]      ___sys_sendmsg+0xee/0x170
[ 1659.295847][   T72]      __sys_sendmsg+0xcd/0x170
[ 1659.295847][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.295847][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.295847][   T72] 
[ 1659.297496][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1659.297743][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1659.297743][   T72]      dst_init+0x84/0x4a0
[ 1659.297743][   T72]      dst_alloc+0x97/0x150
[ 1659.297743][   T72]      ip6_dst_alloc+0x23/0x90
[ 1659.297743][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1659.297743][   T72]      ip6_pol_route+0x56f/0x840
[ 1659.297743][   T72]      fib6_rule_lookup+0x227/0x600
[ 1659.297743][   T72]      ip6_route_output_flags+0x251/0x460
[ 1659.297743][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1659.297743][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1659.297743][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1659.297743][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1659.297743][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1659.297743][   T72]      __sys_connect+0x217/0x2a0
[ 1659.297743][   T72]      __x64_sys_connect+0x72/0xb0
[ 1659.297743][   T72]      do_syscall_64+0xc6/0x1e0
[ 1659.297743][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1659.297743][   T72] 
[ 1669.444706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1669.445086][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1669.445086][   T72]      netdev_get_by_index+0x5e/0x80
[ 1669.445086][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1669.445086][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1669.445086][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1669.445086][   T72]      ipv6_add_addr+0x411/0x2000
[ 1669.445086][   T72]      inet6_addr_add+0x30e/0xa40
[ 1669.445086][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1669.445086][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.445086][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.445086][   T72]      netlink_unicast+0x449/0x710
[ 1669.445086][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.445086][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.445086][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.445086][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.445086][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.445086][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.445086][   T72] 
[ 1669.447062][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1669.447062][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1669.447062][   T72]      ipv6_find_idev+0x102/0x170
[ 1669.447062][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1669.447062][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.447062][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.447062][   T72]      netlink_unicast+0x449/0x710
[ 1669.447062][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.447062][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.447062][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.447062][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.447062][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.447062][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.447062][   T72] 
[ 1669.448579][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1669.448579][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1669.448579][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1669.448579][   T72]      ipv6_find_idev+0x102/0x170
[ 1669.448579][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1669.448579][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.448579][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.448579][   T72]      netlink_unicast+0x449/0x710
[ 1669.448579][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.448579][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.448579][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.448579][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.448579][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.448579][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.448579][   T72] 
[ 1669.450236][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1669.450502][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1669.450502][   T72]      netdev_get_by_index+0x5e/0x80
[ 1669.450502][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1669.450502][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1669.450502][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1669.450502][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1669.450502][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1669.450502][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1669.450502][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1669.450502][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1669.450502][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1669.450502][   T72]      vfs_write+0x9e5/0x10a0
[ 1669.450502][   T72]      ksys_write+0xf5/0x1e0
[ 1669.450502][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.450502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.450502][   T72] 
[ 1669.452323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1669.452323][   T72]      netdev_get_by_index+0x5e/0x80
[ 1669.452323][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1669.452323][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1669.452323][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1669.452323][   T72]      ipv6_add_addr+0x411/0x2000
[ 1669.452323][   T72]      inet6_addr_add+0x30e/0xa40
[ 1669.452323][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1669.452323][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.452323][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.452323][   T72]      netlink_unicast+0x449/0x710
[ 1669.452323][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.452323][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.452323][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.452323][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.452323][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.452323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.452323][   T72] 
[ 1669.454287][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1669.454287][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1669.454287][   T72]      ipv6_find_idev+0x102/0x170
[ 1669.454287][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1669.454287][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.454287][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.454287][   T72]      netlink_unicast+0x449/0x710
[ 1669.454287][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.454287][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.454287][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.454287][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.454287][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.454287][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.454287][   T72] 
[ 1669.455806][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1669.455806][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1669.455806][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1669.455806][   T72]      ipv6_find_idev+0x102/0x170
[ 1669.455806][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1669.455806][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1669.455806][   T72]      netlink_rcv_skb+0x130/0x360
[ 1669.455806][   T72]      netlink_unicast+0x449/0x710
[ 1669.455806][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1669.455806][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1669.455806][   T72]      ___sys_sendmsg+0xee/0x170
[ 1669.455806][   T72]      __sys_sendmsg+0xcd/0x170
[ 1669.455806][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.455806][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.455806][   T72] 
[ 1669.457464][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1669.457711][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1669.457711][   T72]      dst_init+0x84/0x4a0
[ 1669.457711][   T72]      dst_alloc+0x97/0x150
[ 1669.457711][   T72]      ip6_dst_alloc+0x23/0x90
[ 1669.457711][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1669.457711][   T72]      ip6_pol_route+0x56f/0x840
[ 1669.457711][   T72]      fib6_rule_lookup+0x227/0x600
[ 1669.457711][   T72]      ip6_route_output_flags+0x251/0x460
[ 1669.457711][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1669.457711][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1669.457711][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1669.457711][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1669.457711][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1669.457711][   T72]      __sys_connect+0x217/0x2a0
[ 1669.457711][   T72]      __x64_sys_connect+0x72/0xb0
[ 1669.457711][   T72]      do_syscall_64+0xc6/0x1e0
[ 1669.457711][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1669.457711][   T72] 
[ 1679.604704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1679.605140][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1679.605140][   T72]      netdev_get_by_index+0x5e/0x80
[ 1679.605140][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1679.605140][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1679.605140][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1679.605140][   T72]      ipv6_add_addr+0x411/0x2000
[ 1679.605140][   T72]      inet6_addr_add+0x30e/0xa40
[ 1679.605140][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1679.605140][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.605140][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.605140][   T72]      netlink_unicast+0x449/0x710
[ 1679.605140][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.605140][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.605140][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.605140][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.605140][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.605140][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.605140][   T72] 
[ 1679.607118][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1679.607118][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1679.607118][   T72]      ipv6_find_idev+0x102/0x170
[ 1679.607118][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1679.607118][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.607118][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.607118][   T72]      netlink_unicast+0x449/0x710
[ 1679.607118][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.607118][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.607118][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.607118][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.607118][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.607118][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.607118][   T72] 
[ 1679.608633][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1679.608633][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1679.608633][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1679.608633][   T72]      ipv6_find_idev+0x102/0x170
[ 1679.608633][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1679.608633][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.608633][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.608633][   T72]      netlink_unicast+0x449/0x710
[ 1679.608633][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.608633][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.608633][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.608633][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.608633][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.608633][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.608633][   T72] 
[ 1679.610296][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1679.610569][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1679.610569][   T72]      netdev_get_by_index+0x5e/0x80
[ 1679.610569][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1679.610569][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1679.610569][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1679.610569][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1679.610569][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1679.610569][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1679.610569][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1679.610569][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1679.610569][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1679.610569][   T72]      vfs_write+0x9e5/0x10a0
[ 1679.610569][   T72]      ksys_write+0xf5/0x1e0
[ 1679.610569][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.610569][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.610569][   T72] 
[ 1679.612396][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1679.612396][   T72]      netdev_get_by_index+0x5e/0x80
[ 1679.612396][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1679.612396][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1679.612396][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1679.612396][   T72]      ipv6_add_addr+0x411/0x2000
[ 1679.612396][   T72]      inet6_addr_add+0x30e/0xa40
[ 1679.612396][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1679.612396][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.612396][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.612396][   T72]      netlink_unicast+0x449/0x710
[ 1679.612396][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.612396][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.612396][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.612396][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.612396][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.612396][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.612396][   T72] 
[ 1679.614355][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1679.614355][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1679.614355][   T72]      ipv6_find_idev+0x102/0x170
[ 1679.614355][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1679.614355][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.614355][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.614355][   T72]      netlink_unicast+0x449/0x710
[ 1679.614355][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.614355][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.614355][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.614355][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.614355][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.614355][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.614355][   T72] 
[ 1679.615863][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1679.615863][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1679.615863][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1679.615863][   T72]      ipv6_find_idev+0x102/0x170
[ 1679.615863][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1679.615863][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1679.615863][   T72]      netlink_rcv_skb+0x130/0x360
[ 1679.615863][   T72]      netlink_unicast+0x449/0x710
[ 1679.615863][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1679.615863][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1679.615863][   T72]      ___sys_sendmsg+0xee/0x170
[ 1679.615863][   T72]      __sys_sendmsg+0xcd/0x170
[ 1679.615863][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.615863][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.615863][   T72] 
[ 1679.617515][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1679.617778][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1679.617778][   T72]      dst_init+0x84/0x4a0
[ 1679.617778][   T72]      dst_alloc+0x97/0x150
[ 1679.617778][   T72]      ip6_dst_alloc+0x23/0x90
[ 1679.617778][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1679.617778][   T72]      ip6_pol_route+0x56f/0x840
[ 1679.617778][   T72]      fib6_rule_lookup+0x227/0x600
[ 1679.617778][   T72]      ip6_route_output_flags+0x251/0x460
[ 1679.617778][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1679.617778][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1679.617778][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1679.617778][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1679.617778][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1679.617778][   T72]      __sys_connect+0x217/0x2a0
[ 1679.617778][   T72]      __x64_sys_connect+0x72/0xb0
[ 1679.617778][   T72]      do_syscall_64+0xc6/0x1e0
[ 1679.617778][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1679.617778][   T72] 
[ 1689.860639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1689.861018][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1689.861018][   T72]      netdev_get_by_index+0x5e/0x80
[ 1689.861018][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1689.861018][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1689.861018][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1689.861018][   T72]      ipv6_add_addr+0x411/0x2000
[ 1689.861018][   T72]      inet6_addr_add+0x30e/0xa40
[ 1689.861018][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1689.861018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.861018][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.861018][   T72]      netlink_unicast+0x449/0x710
[ 1689.861018][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.861018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.861018][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.861018][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.861018][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.861018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.861018][   T72] 
[ 1689.862989][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1689.862989][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1689.862989][   T72]      ipv6_find_idev+0x102/0x170
[ 1689.862989][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1689.862989][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.862989][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.862989][   T72]      netlink_unicast+0x449/0x710
[ 1689.862989][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.862989][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.862989][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.862989][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.862989][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.862989][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.862989][   T72] 
[ 1689.864497][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1689.864497][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1689.864497][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1689.864497][   T72]      ipv6_find_idev+0x102/0x170
[ 1689.864497][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1689.864497][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.864497][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.864497][   T72]      netlink_unicast+0x449/0x710
[ 1689.864497][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.864497][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.864497][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.864497][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.864497][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.864497][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.864497][   T72] 
[ 1689.866165][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1689.866427][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1689.866427][   T72]      netdev_get_by_index+0x5e/0x80
[ 1689.866427][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1689.866427][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1689.866427][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1689.866427][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1689.866427][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1689.866427][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1689.866427][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1689.866427][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1689.866427][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1689.866427][   T72]      vfs_write+0x9e5/0x10a0
[ 1689.866427][   T72]      ksys_write+0xf5/0x1e0
[ 1689.866427][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.866427][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.866427][   T72] 
[ 1689.868237][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1689.868237][   T72]      netdev_get_by_index+0x5e/0x80
[ 1689.868237][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1689.868237][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1689.868237][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1689.868237][   T72]      ipv6_add_addr+0x411/0x2000
[ 1689.868237][   T72]      inet6_addr_add+0x30e/0xa40
[ 1689.868237][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1689.868237][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.868237][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.868237][   T72]      netlink_unicast+0x449/0x710
[ 1689.868237][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.868237][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.868237][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.868237][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.868237][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.868237][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.868237][   T72] 
[ 1689.870193][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1689.870193][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1689.870193][   T72]      ipv6_find_idev+0x102/0x170
[ 1689.870193][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1689.870193][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.870193][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.870193][   T72]      netlink_unicast+0x449/0x710
[ 1689.870193][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.870193][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.870193][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.870193][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.870193][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.870193][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.870193][   T72] 
[ 1689.871700][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1689.871700][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1689.871700][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1689.871700][   T72]      ipv6_find_idev+0x102/0x170
[ 1689.871700][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1689.871700][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1689.871700][   T72]      netlink_rcv_skb+0x130/0x360
[ 1689.871700][   T72]      netlink_unicast+0x449/0x710
[ 1689.871700][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1689.871700][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1689.871700][   T72]      ___sys_sendmsg+0xee/0x170
[ 1689.871700][   T72]      __sys_sendmsg+0xcd/0x170
[ 1689.871700][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.871700][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.871700][   T72] 
[ 1689.873380][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1689.873623][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1689.873623][   T72]      dst_init+0x84/0x4a0
[ 1689.873623][   T72]      dst_alloc+0x97/0x150
[ 1689.873623][   T72]      ip6_dst_alloc+0x23/0x90
[ 1689.873623][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1689.873623][   T72]      ip6_pol_route+0x56f/0x840
[ 1689.873623][   T72]      fib6_rule_lookup+0x227/0x600
[ 1689.873623][   T72]      ip6_route_output_flags+0x251/0x460
[ 1689.873623][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1689.873623][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1689.873623][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1689.873623][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1689.873623][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1689.873623][   T72]      __sys_connect+0x217/0x2a0
[ 1689.873623][   T72]      __x64_sys_connect+0x72/0xb0
[ 1689.873623][   T72]      do_syscall_64+0xc6/0x1e0
[ 1689.873623][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1689.873623][   T72] 
[ 1700.012638][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1700.013073][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1700.013073][   T72]      netdev_get_by_index+0x5e/0x80
[ 1700.013073][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1700.013073][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1700.013073][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1700.013073][   T72]      ipv6_add_addr+0x411/0x2000
[ 1700.013073][   T72]      inet6_addr_add+0x30e/0xa40
[ 1700.013073][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1700.013073][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.013073][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.013073][   T72]      netlink_unicast+0x449/0x710
[ 1700.013073][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.013073][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.013073][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.013073][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.013073][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.013073][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.013073][   T72] 
[ 1700.015059][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1700.015059][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1700.015059][   T72]      ipv6_find_idev+0x102/0x170
[ 1700.015059][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1700.015059][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.015059][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.015059][   T72]      netlink_unicast+0x449/0x710
[ 1700.015059][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.015059][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.015059][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.015059][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.015059][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.015059][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.015059][   T72] 
[ 1700.016575][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1700.016575][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1700.016575][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1700.016575][   T72]      ipv6_find_idev+0x102/0x170
[ 1700.016575][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1700.016575][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.016575][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.016575][   T72]      netlink_unicast+0x449/0x710
[ 1700.016575][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.016575][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.016575][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.016575][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.016575][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.016575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.016575][   T72] 
[ 1700.018235][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1700.018508][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1700.018508][   T72]      netdev_get_by_index+0x5e/0x80
[ 1700.018508][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1700.018508][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1700.018508][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1700.018508][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1700.018508][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1700.018508][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1700.018508][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1700.018508][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1700.018508][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1700.018508][   T72]      vfs_write+0x9e5/0x10a0
[ 1700.018508][   T72]      ksys_write+0xf5/0x1e0
[ 1700.018508][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.018508][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.018508][   T72] 
[ 1700.020338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1700.020338][   T72]      netdev_get_by_index+0x5e/0x80
[ 1700.020338][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1700.020338][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1700.020338][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1700.020338][   T72]      ipv6_add_addr+0x411/0x2000
[ 1700.020338][   T72]      inet6_addr_add+0x30e/0xa40
[ 1700.020338][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1700.020338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.020338][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.020338][   T72]      netlink_unicast+0x449/0x710
[ 1700.020338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.020338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.020338][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.020338][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.020338][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.020338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.020338][   T72] 
[ 1700.022362][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1700.022362][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1700.022362][   T72]      ipv6_find_idev+0x102/0x170
[ 1700.022362][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1700.022362][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.022362][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.022362][   T72]      netlink_unicast+0x449/0x710
[ 1700.022362][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.022362][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.022362][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.022362][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.022362][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.022362][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.022362][   T72] 
[ 1700.023870][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1700.023870][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1700.023870][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1700.023870][   T72]      ipv6_find_idev+0x102/0x170
[ 1700.023870][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1700.023870][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1700.023870][   T72]      netlink_rcv_skb+0x130/0x360
[ 1700.023870][   T72]      netlink_unicast+0x449/0x710
[ 1700.023870][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1700.023870][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1700.023870][   T72]      ___sys_sendmsg+0xee/0x170
[ 1700.023870][   T72]      __sys_sendmsg+0xcd/0x170
[ 1700.023870][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.023870][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.023870][   T72] 
[ 1700.025513][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1700.025761][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1700.025761][   T72]      dst_init+0x84/0x4a0
[ 1700.025761][   T72]      dst_alloc+0x97/0x150
[ 1700.025761][   T72]      ip6_dst_alloc+0x23/0x90
[ 1700.025761][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1700.025761][   T72]      ip6_pol_route+0x56f/0x840
[ 1700.025761][   T72]      fib6_rule_lookup+0x227/0x600
[ 1700.025761][   T72]      ip6_route_output_flags+0x251/0x460
[ 1700.025761][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1700.025761][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1700.025761][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1700.025761][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1700.025761][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1700.025761][   T72]      __sys_connect+0x217/0x2a0
[ 1700.025761][   T72]      __x64_sys_connect+0x72/0xb0
[ 1700.025761][   T72]      do_syscall_64+0xc6/0x1e0
[ 1700.025761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1700.025761][   T72] 
[ 1710.028633][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1710.029066][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1710.029066][   T72]      netdev_get_by_index+0x5e/0x80
[ 1710.029066][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1710.029066][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1710.029066][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1710.029066][   T72]      ipv6_add_addr+0x411/0x2000
[ 1710.029066][   T72]      inet6_addr_add+0x30e/0xa40
[ 1710.029066][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1710.029066][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.029066][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.029066][   T72]      netlink_unicast+0x449/0x710
[ 1710.029066][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.029066][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.029066][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.029066][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.029066][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.029066][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.029066][   T72] 
[ 1710.031040][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1710.031040][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1710.031040][   T72]      ipv6_find_idev+0x102/0x170
[ 1710.031040][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1710.031040][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.031040][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.031040][   T72]      netlink_unicast+0x449/0x710
[ 1710.031040][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.031040][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.031040][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.031040][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.031040][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.031040][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.031040][   T72] 
[ 1710.032634][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1710.032634][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1710.032634][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1710.032634][   T72]      ipv6_find_idev+0x102/0x170
[ 1710.032634][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1710.032634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.032634][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.032634][   T72]      netlink_unicast+0x449/0x710
[ 1710.032634][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.032634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.032634][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.032634][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.032634][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.032634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.032634][   T72] 
[ 1710.034290][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1710.034555][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1710.034555][   T72]      netdev_get_by_index+0x5e/0x80
[ 1710.034555][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1710.034555][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1710.034555][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1710.034555][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1710.034555][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1710.034555][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1710.034555][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1710.034555][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1710.034555][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1710.034555][   T72]      vfs_write+0x9e5/0x10a0
[ 1710.034555][   T72]      ksys_write+0xf5/0x1e0
[ 1710.034555][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.034555][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.034555][   T72] 
[ 1710.036371][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1710.036371][   T72]      netdev_get_by_index+0x5e/0x80
[ 1710.036371][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1710.036371][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1710.036371][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1710.036371][   T72]      ipv6_add_addr+0x411/0x2000
[ 1710.036371][   T72]      inet6_addr_add+0x30e/0xa40
[ 1710.036371][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1710.036371][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.036371][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.036371][   T72]      netlink_unicast+0x449/0x710
[ 1710.036371][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.036371][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.036371][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.036371][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.036371][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.036371][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.036371][   T72] 
[ 1710.038322][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1710.038322][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1710.038322][   T72]      ipv6_find_idev+0x102/0x170
[ 1710.038322][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1710.038322][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.038322][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.038322][   T72]      netlink_unicast+0x449/0x710
[ 1710.038322][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.038322][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.038322][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.038322][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.038322][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.038322][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.038322][   T72] 
[ 1710.039833][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1710.039833][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1710.039833][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1710.039833][   T72]      ipv6_find_idev+0x102/0x170
[ 1710.039833][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1710.039833][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1710.039833][   T72]      netlink_rcv_skb+0x130/0x360
[ 1710.039833][   T72]      netlink_unicast+0x449/0x710
[ 1710.039833][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1710.039833][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1710.039833][   T72]      ___sys_sendmsg+0xee/0x170
[ 1710.039833][   T72]      __sys_sendmsg+0xcd/0x170
[ 1710.039833][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.039833][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.039833][   T72] 
[ 1710.041483][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1710.041741][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1710.041741][   T72]      dst_init+0x84/0x4a0
[ 1710.041741][   T72]      dst_alloc+0x97/0x150
[ 1710.041741][   T72]      ip6_dst_alloc+0x23/0x90
[ 1710.041741][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1710.041741][   T72]      ip6_pol_route+0x56f/0x840
[ 1710.041741][   T72]      fib6_rule_lookup+0x227/0x600
[ 1710.041741][   T72]      ip6_route_output_flags+0x251/0x460
[ 1710.041741][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1710.041741][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1710.041741][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1710.041741][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1710.041741][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1710.041741][   T72]      __sys_connect+0x217/0x2a0
[ 1710.041741][   T72]      __x64_sys_connect+0x72/0xb0
[ 1710.041741][   T72]      do_syscall_64+0xc6/0x1e0
[ 1710.041741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1710.041741][   T72] 
[ 1720.284708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1720.285151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1720.285151][   T72]      netdev_get_by_index+0x5e/0x80
[ 1720.285151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1720.285151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1720.285151][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1720.285151][   T72]      ipv6_add_addr+0x411/0x2000
[ 1720.285151][   T72]      inet6_addr_add+0x30e/0xa40
[ 1720.285151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1720.285151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.285151][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.285151][   T72]      netlink_unicast+0x449/0x710
[ 1720.285151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.285151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.285151][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.285151][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.285151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.285151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.285151][   T72] 
[ 1720.287131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1720.287131][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1720.287131][   T72]      ipv6_find_idev+0x102/0x170
[ 1720.287131][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1720.287131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.287131][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.287131][   T72]      netlink_unicast+0x449/0x710
[ 1720.287131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.287131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.287131][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.287131][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.287131][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.287131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.287131][   T72] 
[ 1720.288647][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1720.288647][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1720.288647][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1720.288647][   T72]      ipv6_find_idev+0x102/0x170
[ 1720.288647][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1720.288647][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.288647][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.288647][   T72]      netlink_unicast+0x449/0x710
[ 1720.288647][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.288647][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.288647][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.288647][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.288647][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.288647][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.288647][   T72] 
[ 1720.290306][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1720.290577][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1720.290577][   T72]      netdev_get_by_index+0x5e/0x80
[ 1720.290577][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1720.290577][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1720.290577][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1720.290577][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1720.290577][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1720.290577][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1720.290577][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1720.290577][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1720.290577][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1720.290577][   T72]      vfs_write+0x9e5/0x10a0
[ 1720.290577][   T72]      ksys_write+0xf5/0x1e0
[ 1720.290577][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.290577][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.290577][   T72] 
[ 1720.292415][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1720.292415][   T72]      netdev_get_by_index+0x5e/0x80
[ 1720.292415][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1720.292415][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1720.292415][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1720.292415][   T72]      ipv6_add_addr+0x411/0x2000
[ 1720.292415][   T72]      inet6_addr_add+0x30e/0xa40
[ 1720.292415][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1720.292415][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.292415][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.292415][   T72]      netlink_unicast+0x449/0x710
[ 1720.292415][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.292415][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.292415][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.292415][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.292415][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.292415][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.292415][   T72] 
[ 1720.294369][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1720.294369][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1720.294369][   T72]      ipv6_find_idev+0x102/0x170
[ 1720.294369][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1720.294369][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.294369][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.294369][   T72]      netlink_unicast+0x449/0x710
[ 1720.294369][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.294369][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.294369][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.294369][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.294369][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.294369][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.294369][   T72] 
[ 1720.295879][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1720.295879][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1720.295879][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1720.295879][   T72]      ipv6_find_idev+0x102/0x170
[ 1720.295879][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1720.295879][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1720.295879][   T72]      netlink_rcv_skb+0x130/0x360
[ 1720.295879][   T72]      netlink_unicast+0x449/0x710
[ 1720.295879][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1720.295879][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1720.295879][   T72]      ___sys_sendmsg+0xee/0x170
[ 1720.295879][   T72]      __sys_sendmsg+0xcd/0x170
[ 1720.295879][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.295879][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.295879][   T72] 
[ 1720.297542][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1720.297828][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1720.297828][   T72]      dst_init+0x84/0x4a0
[ 1720.297828][   T72]      dst_alloc+0x97/0x150
[ 1720.297828][   T72]      ip6_dst_alloc+0x23/0x90
[ 1720.297828][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1720.297828][   T72]      ip6_pol_route+0x56f/0x840
[ 1720.297828][   T72]      fib6_rule_lookup+0x227/0x600
[ 1720.297828][   T72]      ip6_route_output_flags+0x251/0x460
[ 1720.297828][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1720.297828][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1720.297828][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1720.297828][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1720.297828][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1720.297828][   T72]      __sys_connect+0x217/0x2a0
[ 1720.297828][   T72]      __x64_sys_connect+0x72/0xb0
[ 1720.297828][   T72]      do_syscall_64+0xc6/0x1e0
[ 1720.297828][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1720.297828][   T72] 
[ 1721.636721][   T42] INFO: task modprobe:1562 blocked for more than 1228 seconds.
[ 1721.636979][   T42]       Not tainted 6.8.0-virtme #1
[ 1721.637107][   T42] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1721.637338][   T42] task:modprobe        state:D stack:25544 pid:1562  tgid:1562  ppid:1240   flags:0x00004002
[ 1721.637634][   T42] Call Trace:
[ 1721.637743][   T42]  <TASK>
[ 1721.637819][   T42]  __schedule+0x705/0x1ac0
[ 1721.637964][   T42]  ? __pfx___schedule+0x10/0x10
[ 1721.638100][   T42]  ? schedule+0x1a5/0x210
[ 1721.638205][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1721.638353][   T42]  ? mark_lock+0x38/0x3e0
[ 1721.638456][   T42]  ? do_raw_spin_lock+0x131/0x270
[ 1721.638609][   T42]  ? schedule+0x1a5/0x210
[ 1721.638718][   T42]  schedule+0xdf/0x210
[ 1721.638823][   T42]  schedule_preempt_disabled+0x15/0x30
[ 1721.638957][   T42]  rwsem_down_write_slowpath+0x3af/0xab0
[ 1721.639098][   T42]  ? __pfx_rwsem_down_write_slowpath+0x10/0x10
[ 1721.639271][   T42]  ? kasan_save_stack+0x34/0x50
[ 1721.639409][   T42]  ? kasan_save_stack+0x24/0x50
[ 1721.639546][   T42]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1721.639701][   T42]  ? lock_acquire+0x1c1/0x220
[ 1721.639837][   T42]  ? register_pernet_subsys+0x1a/0x50
[ 1721.639980][   T42]  down_write+0x1c9/0x200
[ 1721.640088][   T42]  ? __pfx_down_write+0x10/0x10
[ 1721.640224][   T42]  ? __pfx___lock_release+0x10/0x10
[ 1721.640365][   T42]  ? __pfx_nf_tables_module_init+0x10/0x10 [nf_tables]
[ 1721.640569][   T42]  register_pernet_subsys+0x1a/0x50
[ 1721.640716][   T42]  nf_tables_module_init+0x17/0x100 [nf_tables]
[ 1721.640909][   T42]  do_one_initcall+0xc8/0x3f0
[ 1721.641050][   T42]  ? __pfx_do_one_initcall+0x10/0x10
[ 1721.641190][   T42]  ? __create_object+0x5e/0xb0
[ 1721.641330][   T42]  ? kasan_unpoison+0x27/0x60
[ 1721.641471][   T42]  do_init_module+0x233/0x740
[ 1721.641625][   T42]  load_module+0x16b5/0x2350
[ 1721.641776][   T42]  ? __pfx_load_module+0x10/0x10
[ 1721.641916][   T42]  ? kernel_read_file+0x3d2/0x520
[ 1721.642064][   T42]  ? kernel_read_file+0x300/0x520
[ 1721.642204][   T42]  ? __pfx_kernel_read_file+0x10/0x10
[ 1721.642349][   T42]  ? init_module_from_file+0xd2/0x130
[ 1721.642485][   T42]  init_module_from_file+0xd2/0x130
[ 1721.642642][   T42]  ? __pfx_init_module_from_file+0x10/0x10
[ 1721.642814][   T42]  ? __lock_release+0x103/0x460
[ 1721.643460][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1721.643615][   T42]  ? idempotent_init_module+0x32a/0x620
[ 1721.643751][   T42]  ? do_raw_spin_unlock+0x58/0x220
[ 1721.643891][   T42]  idempotent_init_module+0x342/0x620
[ 1721.644031][   T42]  ? __pfx_idempotent_init_module+0x10/0x10
[ 1721.644221][   T42]  __x64_sys_finit_module+0xbe/0x130
[ 1721.644359][   T42]  do_syscall_64+0xc6/0x1e0
[ 1721.644497][   T42]  entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1721.644679][   T42] RIP: 0033:0x7ff3fdc10e5d
[ 1721.644821][   T42] RSP: 002b:00007ffdd9218c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1721.645029][   T42] RAX: ffffffffffffffda RBX: 0000564f280aee60 RCX: 00007ff3fdc10e5d
[ 1721.645230][   T42] RDX: 0000000000000000 RSI: 0000564f0a3e7a2a RDI: 0000000000000000
[ 1721.645429][   T42] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000564f280af050
[ 1721.645638][   T42] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564f0a3e7a2a
[ 1721.645839][   T42] R13: 0000564f280aef80 R14: 0000564f280af0c0 R15: 0000000000000000
[ 1721.646054][   T42]  </TASK>
[ 1721.646158][   T42] Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
[ 1721.646382][   T42] 
[ 1721.646382][   T42] Showing all locks held in the system:
[ 1721.646577][   T42] 1 lock held by khungtaskd/42:
[ 1721.646732][   T42]  #0: ffffffffbc169160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x350
[ 1721.646982][   T42] 3 locks held by kworker/u16:1/72:
[ 1721.647112][   T42]  #0: ffff8880018fa948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1721.647383][   T42]  #1: ffffc900004dfda0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1721.647635][   T42]  #2: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbc/0xa20
[ 1721.647879][   T42] 2 locks held by kworker/u20:3/1240:
[ 1721.648009][   T42]  #0: ffff888001159d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0xfae/0x18a0
[ 1721.648279][   T42]  #1: ffffc9000305fda0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7cd/0x18a0
[ 1721.648584][   T42] 1 lock held by modprobe/1562:
[ 1721.648726][   T42]  #0: ffffffffbc96bf10 (pernet_ops_rwsem){++++}-{3:3}, at: register_pernet_subsys+0x1a/0x50
[ 1721.648996][   T42] 
[ 1721.649063][   T42] =============================================
[ 1721.649063][   T42] 
[ 1730.348691][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1730.349125][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1730.349125][   T72]      netdev_get_by_index+0x5e/0x80
[ 1730.349125][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1730.349125][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1730.349125][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1730.349125][   T72]      ipv6_add_addr+0x411/0x2000
[ 1730.349125][   T72]      inet6_addr_add+0x30e/0xa40
[ 1730.349125][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1730.349125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.349125][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.349125][   T72]      netlink_unicast+0x449/0x710
[ 1730.349125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.349125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.349125][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.349125][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.349125][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.349125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.349125][   T72] 
[ 1730.351103][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1730.351103][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1730.351103][   T72]      ipv6_find_idev+0x102/0x170
[ 1730.351103][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1730.351103][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.351103][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.351103][   T72]      netlink_unicast+0x449/0x710
[ 1730.351103][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.351103][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.351103][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.351103][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.351103][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.351103][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.351103][   T72] 
[ 1730.352706][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1730.352706][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1730.352706][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1730.352706][   T72]      ipv6_find_idev+0x102/0x170
[ 1730.352706][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1730.352706][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.352706][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.352706][   T72]      netlink_unicast+0x449/0x710
[ 1730.352706][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.352706][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.352706][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.352706][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.352706][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.352706][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.352706][   T72] 
[ 1730.354373][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1730.354654][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1730.354654][   T72]      netdev_get_by_index+0x5e/0x80
[ 1730.354654][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1730.354654][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1730.354654][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1730.354654][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1730.354654][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1730.354654][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1730.354654][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1730.354654][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1730.354654][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1730.354654][   T72]      vfs_write+0x9e5/0x10a0
[ 1730.354654][   T72]      ksys_write+0xf5/0x1e0
[ 1730.354654][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.354654][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.354654][   T72] 
[ 1730.356469][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1730.356469][   T72]      netdev_get_by_index+0x5e/0x80
[ 1730.356469][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1730.356469][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1730.356469][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1730.356469][   T72]      ipv6_add_addr+0x411/0x2000
[ 1730.356469][   T72]      inet6_addr_add+0x30e/0xa40
[ 1730.356469][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1730.356469][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.356469][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.356469][   T72]      netlink_unicast+0x449/0x710
[ 1730.356469][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.356469][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.356469][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.356469][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.356469][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.356469][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.356469][   T72] 
[ 1730.358434][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1730.358434][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1730.358434][   T72]      ipv6_find_idev+0x102/0x170
[ 1730.358434][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1730.358434][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.358434][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.358434][   T72]      netlink_unicast+0x449/0x710
[ 1730.358434][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.358434][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.358434][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.358434][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.358434][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.358434][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.358434][   T72] 
[ 1730.359940][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1730.359940][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1730.359940][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1730.359940][   T72]      ipv6_find_idev+0x102/0x170
[ 1730.359940][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1730.359940][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1730.359940][   T72]      netlink_rcv_skb+0x130/0x360
[ 1730.359940][   T72]      netlink_unicast+0x449/0x710
[ 1730.359940][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1730.359940][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1730.359940][   T72]      ___sys_sendmsg+0xee/0x170
[ 1730.359940][   T72]      __sys_sendmsg+0xcd/0x170
[ 1730.359940][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.359940][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.359940][   T72] 
[ 1730.361599][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1730.361831][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1730.361831][   T72]      dst_init+0x84/0x4a0
[ 1730.361831][   T72]      dst_alloc+0x97/0x150
[ 1730.361831][   T72]      ip6_dst_alloc+0x23/0x90
[ 1730.361831][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1730.361831][   T72]      ip6_pol_route+0x56f/0x840
[ 1730.361831][   T72]      fib6_rule_lookup+0x227/0x600
[ 1730.361831][   T72]      ip6_route_output_flags+0x251/0x460
[ 1730.361831][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1730.361831][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1730.361831][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1730.361831][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1730.361831][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1730.361831][   T72]      __sys_connect+0x217/0x2a0
[ 1730.361831][   T72]      __x64_sys_connect+0x72/0xb0
[ 1730.361831][   T72]      do_syscall_64+0xc6/0x1e0
[ 1730.361831][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1730.361831][   T72] 
[ 1740.540695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1740.541126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1740.541126][   T72]      netdev_get_by_index+0x5e/0x80
[ 1740.541126][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1740.541126][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1740.541126][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1740.541126][   T72]      ipv6_add_addr+0x411/0x2000
[ 1740.541126][   T72]      inet6_addr_add+0x30e/0xa40
[ 1740.541126][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1740.541126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.541126][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.541126][   T72]      netlink_unicast+0x449/0x710
[ 1740.541126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.541126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.541126][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.541126][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.541126][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.541126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.541126][   T72] 
[ 1740.543122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1740.543122][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1740.543122][   T72]      ipv6_find_idev+0x102/0x170
[ 1740.543122][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1740.543122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.543122][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.543122][   T72]      netlink_unicast+0x449/0x710
[ 1740.543122][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.543122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.543122][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.543122][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.543122][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.543122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.543122][   T72] 
[ 1740.544635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1740.544635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1740.544635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1740.544635][   T72]      ipv6_find_idev+0x102/0x170
[ 1740.544635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1740.544635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.544635][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.544635][   T72]      netlink_unicast+0x449/0x710
[ 1740.544635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.544635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.544635][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.544635][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.544635][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.544635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.544635][   T72] 
[ 1740.546286][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1740.546554][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1740.546554][   T72]      netdev_get_by_index+0x5e/0x80
[ 1740.546554][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1740.546554][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1740.546554][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1740.546554][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1740.546554][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1740.546554][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1740.546554][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1740.546554][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1740.546554][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1740.546554][   T72]      vfs_write+0x9e5/0x10a0
[ 1740.546554][   T72]      ksys_write+0xf5/0x1e0
[ 1740.546554][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.546554][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.546554][   T72] 
[ 1740.548368][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1740.548368][   T72]      netdev_get_by_index+0x5e/0x80
[ 1740.548368][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1740.548368][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1740.548368][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1740.548368][   T72]      ipv6_add_addr+0x411/0x2000
[ 1740.548368][   T72]      inet6_addr_add+0x30e/0xa40
[ 1740.548368][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1740.548368][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.548368][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.548368][   T72]      netlink_unicast+0x449/0x710
[ 1740.548368][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.548368][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.548368][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.548368][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.548368][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.548368][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.548368][   T72] 
[ 1740.550321][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1740.550321][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1740.550321][   T72]      ipv6_find_idev+0x102/0x170
[ 1740.550321][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1740.550321][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.550321][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.550321][   T72]      netlink_unicast+0x449/0x710
[ 1740.550321][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.550321][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.550321][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.550321][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.550321][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.550321][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.550321][   T72] 
[ 1740.551836][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1740.551836][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1740.551836][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1740.551836][   T72]      ipv6_find_idev+0x102/0x170
[ 1740.551836][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1740.551836][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1740.551836][   T72]      netlink_rcv_skb+0x130/0x360
[ 1740.551836][   T72]      netlink_unicast+0x449/0x710
[ 1740.551836][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1740.551836][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1740.551836][   T72]      ___sys_sendmsg+0xee/0x170
[ 1740.551836][   T72]      __sys_sendmsg+0xcd/0x170
[ 1740.551836][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.551836][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.551836][   T72] 
[ 1740.553730][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1740.554017][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1740.554017][   T72]      dst_init+0x84/0x4a0
[ 1740.554017][   T72]      dst_alloc+0x97/0x150
[ 1740.554017][   T72]      ip6_dst_alloc+0x23/0x90
[ 1740.554017][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1740.554017][   T72]      ip6_pol_route+0x56f/0x840
[ 1740.554017][   T72]      fib6_rule_lookup+0x227/0x600
[ 1740.554017][   T72]      ip6_route_output_flags+0x251/0x460
[ 1740.554017][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1740.554017][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1740.554017][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1740.554017][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1740.554017][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1740.554017][   T72]      __sys_connect+0x217/0x2a0
[ 1740.554017][   T72]      __x64_sys_connect+0x72/0xb0
[ 1740.554017][   T72]      do_syscall_64+0xc6/0x1e0
[ 1740.554017][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1740.554017][   T72] 
[ 1750.796698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1750.797136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1750.797136][   T72]      netdev_get_by_index+0x5e/0x80
[ 1750.797136][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1750.797136][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1750.797136][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1750.797136][   T72]      ipv6_add_addr+0x411/0x2000
[ 1750.797136][   T72]      inet6_addr_add+0x30e/0xa40
[ 1750.797136][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1750.797136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.797136][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.797136][   T72]      netlink_unicast+0x449/0x710
[ 1750.797136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.797136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.797136][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.797136][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.797136][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.797136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.797136][   T72] 
[ 1750.799124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1750.799124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1750.799124][   T72]      ipv6_find_idev+0x102/0x170
[ 1750.799124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1750.799124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.799124][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.799124][   T72]      netlink_unicast+0x449/0x710
[ 1750.799124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.799124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.799124][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.799124][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.799124][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.799124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.799124][   T72] 
[ 1750.800652][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1750.800652][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1750.800652][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1750.800652][   T72]      ipv6_find_idev+0x102/0x170
[ 1750.800652][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1750.800652][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.800652][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.800652][   T72]      netlink_unicast+0x449/0x710
[ 1750.800652][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.800652][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.800652][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.800652][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.800652][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.800652][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.800652][   T72] 
[ 1750.802348][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1750.802713][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1750.802713][   T72]      netdev_get_by_index+0x5e/0x80
[ 1750.802713][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1750.802713][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1750.802713][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1750.802713][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1750.802713][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1750.802713][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1750.802713][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1750.802713][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1750.802713][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1750.802713][   T72]      vfs_write+0x9e5/0x10a0
[ 1750.802713][   T72]      ksys_write+0xf5/0x1e0
[ 1750.802713][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.802713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.802713][   T72] 
[ 1750.805018][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1750.805018][   T72]      netdev_get_by_index+0x5e/0x80
[ 1750.805018][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1750.805018][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1750.805018][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1750.805018][   T72]      ipv6_add_addr+0x411/0x2000
[ 1750.805018][   T72]      inet6_addr_add+0x30e/0xa40
[ 1750.805018][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1750.805018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.805018][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.805018][   T72]      netlink_unicast+0x449/0x710
[ 1750.805018][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.805018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.805018][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.805018][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.805018][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.805018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.805018][   T72] 
[ 1750.807607][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1750.807607][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1750.807607][   T72]      ipv6_find_idev+0x102/0x170
[ 1750.807607][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1750.807607][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.807607][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.807607][   T72]      netlink_unicast+0x449/0x710
[ 1750.807607][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.807607][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.807607][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.807607][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.807607][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.807607][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.807607][   T72] 
[ 1750.809617][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1750.809617][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1750.809617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1750.809617][   T72]      ipv6_find_idev+0x102/0x170
[ 1750.809617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1750.809617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1750.809617][   T72]      netlink_rcv_skb+0x130/0x360
[ 1750.809617][   T72]      netlink_unicast+0x449/0x710
[ 1750.809617][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1750.809617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1750.809617][   T72]      ___sys_sendmsg+0xee/0x170
[ 1750.809617][   T72]      __sys_sendmsg+0xcd/0x170
[ 1750.809617][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.809617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.809617][   T72] 
[ 1750.811794][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1750.812105][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1750.812105][   T72]      dst_init+0x84/0x4a0
[ 1750.812105][   T72]      dst_alloc+0x97/0x150
[ 1750.812105][   T72]      ip6_dst_alloc+0x23/0x90
[ 1750.812105][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1750.812105][   T72]      ip6_pol_route+0x56f/0x840
[ 1750.812105][   T72]      fib6_rule_lookup+0x227/0x600
[ 1750.812105][   T72]      ip6_route_output_flags+0x251/0x460
[ 1750.812105][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1750.812105][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1750.812105][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1750.812105][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1750.812105][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1750.812105][   T72]      __sys_connect+0x217/0x2a0
[ 1750.812105][   T72]      __x64_sys_connect+0x72/0xb0
[ 1750.812105][   T72]      do_syscall_64+0xc6/0x1e0
[ 1750.812105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1750.812105][   T72] 
[ 1761.052643][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1761.053094][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1761.053094][   T72]      netdev_get_by_index+0x5e/0x80
[ 1761.053094][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1761.053094][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1761.053094][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1761.053094][   T72]      ipv6_add_addr+0x411/0x2000
[ 1761.053094][   T72]      inet6_addr_add+0x30e/0xa40
[ 1761.053094][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1761.053094][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.053094][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.053094][   T72]      netlink_unicast+0x449/0x710
[ 1761.053094][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.053094][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.053094][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.053094][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.053094][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.053094][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.053094][   T72] 
[ 1761.055285][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1761.055285][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1761.055285][   T72]      ipv6_find_idev+0x102/0x170
[ 1761.055285][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1761.055285][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.055285][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.055285][   T72]      netlink_unicast+0x449/0x710
[ 1761.055285][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.055285][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.055285][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.055285][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.055285][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.055285][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.055285][   T72] 
[ 1761.056970][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1761.056970][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1761.056970][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1761.056970][   T72]      ipv6_find_idev+0x102/0x170
[ 1761.056970][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1761.056970][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.056970][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.056970][   T72]      netlink_unicast+0x449/0x710
[ 1761.056970][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.056970][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.056970][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.056970][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.056970][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.056970][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.056970][   T72] 
[ 1761.058811][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1761.059100][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1761.059100][   T72]      netdev_get_by_index+0x5e/0x80
[ 1761.059100][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1761.059100][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1761.059100][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1761.059100][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1761.059100][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1761.059100][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1761.059100][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1761.059100][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1761.059100][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1761.059100][   T72]      vfs_write+0x9e5/0x10a0
[ 1761.059100][   T72]      ksys_write+0xf5/0x1e0
[ 1761.059100][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.059100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.059100][   T72] 
[ 1761.061125][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1761.061125][   T72]      netdev_get_by_index+0x5e/0x80
[ 1761.061125][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1761.061125][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1761.061125][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1761.061125][   T72]      ipv6_add_addr+0x411/0x2000
[ 1761.061125][   T72]      inet6_addr_add+0x30e/0xa40
[ 1761.061125][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1761.061125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.061125][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.061125][   T72]      netlink_unicast+0x449/0x710
[ 1761.061125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.061125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.061125][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.061125][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.061125][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.061125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.061125][   T72] 
[ 1761.063308][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1761.063308][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1761.063308][   T72]      ipv6_find_idev+0x102/0x170
[ 1761.063308][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1761.063308][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.063308][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.063308][   T72]      netlink_unicast+0x449/0x710
[ 1761.063308][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.063308][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.063308][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.063308][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.063308][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.063308][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.063308][   T72] 
[ 1761.064989][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1761.064989][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1761.064989][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1761.064989][   T72]      ipv6_find_idev+0x102/0x170
[ 1761.064989][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1761.064989][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1761.064989][   T72]      netlink_rcv_skb+0x130/0x360
[ 1761.064989][   T72]      netlink_unicast+0x449/0x710
[ 1761.064989][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1761.064989][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1761.064989][   T72]      ___sys_sendmsg+0xee/0x170
[ 1761.064989][   T72]      __sys_sendmsg+0xcd/0x170
[ 1761.064989][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.064989][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.064989][   T72] 
[ 1761.066839][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1761.067092][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1761.067092][   T72]      dst_init+0x84/0x4a0
[ 1761.067092][   T72]      dst_alloc+0x97/0x150
[ 1761.067092][   T72]      ip6_dst_alloc+0x23/0x90
[ 1761.067092][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1761.067092][   T72]      ip6_pol_route+0x56f/0x840
[ 1761.067092][   T72]      fib6_rule_lookup+0x227/0x600
[ 1761.067092][   T72]      ip6_route_output_flags+0x251/0x460
[ 1761.067092][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1761.067092][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1761.067092][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1761.067092][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1761.067092][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1761.067092][   T72]      __sys_connect+0x217/0x2a0
[ 1761.067092][   T72]      __x64_sys_connect+0x72/0xb0
[ 1761.067092][   T72]      do_syscall_64+0xc6/0x1e0
[ 1761.067092][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1761.067092][   T72] 
[ 1771.308699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1771.309143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1771.309143][   T72]      netdev_get_by_index+0x5e/0x80
[ 1771.309143][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1771.309143][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1771.309143][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1771.309143][   T72]      ipv6_add_addr+0x411/0x2000
[ 1771.309143][   T72]      inet6_addr_add+0x30e/0xa40
[ 1771.309143][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1771.309143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.309143][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.309143][   T72]      netlink_unicast+0x449/0x710
[ 1771.309143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.309143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.309143][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.309143][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.309143][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.309143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.309143][   T72] 
[ 1771.311338][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1771.311338][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1771.311338][   T72]      ipv6_find_idev+0x102/0x170
[ 1771.311338][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1771.311338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.311338][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.311338][   T72]      netlink_unicast+0x449/0x710
[ 1771.311338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.311338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.311338][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.311338][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.311338][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.311338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.311338][   T72] 
[ 1771.313034][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1771.313034][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1771.313034][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1771.313034][   T72]      ipv6_find_idev+0x102/0x170
[ 1771.313034][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1771.313034][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.313034][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.313034][   T72]      netlink_unicast+0x449/0x710
[ 1771.313034][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.313034][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.313034][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.313034][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.313034][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.313034][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.313034][   T72] 
[ 1771.314865][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1771.315151][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1771.315151][   T72]      netdev_get_by_index+0x5e/0x80
[ 1771.315151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1771.315151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1771.315151][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1771.315151][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1771.315151][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1771.315151][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1771.315151][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1771.315151][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1771.315151][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1771.315151][   T72]      vfs_write+0x9e5/0x10a0
[ 1771.315151][   T72]      ksys_write+0xf5/0x1e0
[ 1771.315151][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.315151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.315151][   T72] 
[ 1771.317168][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1771.317168][   T72]      netdev_get_by_index+0x5e/0x80
[ 1771.317168][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1771.317168][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1771.317168][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1771.317168][   T72]      ipv6_add_addr+0x411/0x2000
[ 1771.317168][   T72]      inet6_addr_add+0x30e/0xa40
[ 1771.317168][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1771.317168][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.317168][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.317168][   T72]      netlink_unicast+0x449/0x710
[ 1771.317168][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.317168][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.317168][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.317168][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.317168][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.317168][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.317168][   T72] 
[ 1771.319332][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1771.319332][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1771.319332][   T72]      ipv6_find_idev+0x102/0x170
[ 1771.319332][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1771.319332][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.319332][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.319332][   T72]      netlink_unicast+0x449/0x710
[ 1771.319332][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.319332][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.319332][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.319332][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.319332][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.319332][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.319332][   T72] 
[ 1771.321006][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1771.321006][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1771.321006][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1771.321006][   T72]      ipv6_find_idev+0x102/0x170
[ 1771.321006][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1771.321006][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1771.321006][   T72]      netlink_rcv_skb+0x130/0x360
[ 1771.321006][   T72]      netlink_unicast+0x449/0x710
[ 1771.321006][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1771.321006][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1771.321006][   T72]      ___sys_sendmsg+0xee/0x170
[ 1771.321006][   T72]      __sys_sendmsg+0xcd/0x170
[ 1771.321006][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.321006][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.321006][   T72] 
[ 1771.322848][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1771.323103][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1771.323103][   T72]      dst_init+0x84/0x4a0
[ 1771.323103][   T72]      dst_alloc+0x97/0x150
[ 1771.323103][   T72]      ip6_dst_alloc+0x23/0x90
[ 1771.323103][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1771.323103][   T72]      ip6_pol_route+0x56f/0x840
[ 1771.323103][   T72]      fib6_rule_lookup+0x227/0x600
[ 1771.323103][   T72]      ip6_route_output_flags+0x251/0x460
[ 1771.323103][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1771.323103][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1771.323103][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1771.323103][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1771.323103][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1771.323103][   T72]      __sys_connect+0x217/0x2a0
[ 1771.323103][   T72]      __x64_sys_connect+0x72/0xb0
[ 1771.323103][   T72]      do_syscall_64+0xc6/0x1e0
[ 1771.323103][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1771.323103][   T72] 
[ 1781.564698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1781.565164][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1781.565164][   T72]      netdev_get_by_index+0x5e/0x80
[ 1781.565164][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1781.565164][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1781.565164][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1781.565164][   T72]      ipv6_add_addr+0x411/0x2000
[ 1781.565164][   T72]      inet6_addr_add+0x30e/0xa40
[ 1781.565164][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1781.565164][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.565164][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.565164][   T72]      netlink_unicast+0x449/0x710
[ 1781.565164][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.565164][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.565164][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.565164][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.565164][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.565164][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.565164][   T72] 
[ 1781.567595][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1781.567595][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1781.567595][   T72]      ipv6_find_idev+0x102/0x170
[ 1781.567595][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1781.567595][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.567595][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.567595][   T72]      netlink_unicast+0x449/0x710
[ 1781.567595][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.567595][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.567595][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.567595][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.567595][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.567595][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.567595][   T72] 
[ 1781.569450][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1781.569450][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1781.569450][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1781.569450][   T72]      ipv6_find_idev+0x102/0x170
[ 1781.569450][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1781.569450][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.569450][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.569450][   T72]      netlink_unicast+0x449/0x710
[ 1781.569450][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.569450][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.569450][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.569450][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.569450][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.569450][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.569450][   T72] 
[ 1781.571494][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1781.571869][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1781.571869][   T72]      netdev_get_by_index+0x5e/0x80
[ 1781.571869][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1781.571869][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1781.571869][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1781.571869][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1781.571869][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1781.571869][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1781.571869][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1781.571869][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1781.571869][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1781.571869][   T72]      vfs_write+0x9e5/0x10a0
[ 1781.571869][   T72]      ksys_write+0xf5/0x1e0
[ 1781.571869][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.571869][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.571869][   T72] 
[ 1781.574108][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1781.574108][   T72]      netdev_get_by_index+0x5e/0x80
[ 1781.574108][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1781.574108][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1781.574108][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1781.574108][   T72]      ipv6_add_addr+0x411/0x2000
[ 1781.574108][   T72]      inet6_addr_add+0x30e/0xa40
[ 1781.574108][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1781.574108][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.574108][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.574108][   T72]      netlink_unicast+0x449/0x710
[ 1781.574108][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.574108][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.574108][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.574108][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.574108][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.574108][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.574108][   T72] 
[ 1781.576523][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1781.576523][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1781.576523][   T72]      ipv6_find_idev+0x102/0x170
[ 1781.576523][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1781.576523][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.576523][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.576523][   T72]      netlink_unicast+0x449/0x710
[ 1781.576523][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.576523][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.576523][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.576523][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.576523][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.576523][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.576523][   T72] 
[ 1781.578384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1781.578384][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1781.578384][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1781.578384][   T72]      ipv6_find_idev+0x102/0x170
[ 1781.578384][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1781.578384][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1781.578384][   T72]      netlink_rcv_skb+0x130/0x360
[ 1781.578384][   T72]      netlink_unicast+0x449/0x710
[ 1781.578384][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1781.578384][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1781.578384][   T72]      ___sys_sendmsg+0xee/0x170
[ 1781.578384][   T72]      __sys_sendmsg+0xcd/0x170
[ 1781.578384][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.578384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.578384][   T72] 
[ 1781.580440][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1781.580740][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1781.580740][   T72]      dst_init+0x84/0x4a0
[ 1781.580740][   T72]      dst_alloc+0x97/0x150
[ 1781.580740][   T72]      ip6_dst_alloc+0x23/0x90
[ 1781.580740][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1781.580740][   T72]      ip6_pol_route+0x56f/0x840
[ 1781.580740][   T72]      fib6_rule_lookup+0x227/0x600
[ 1781.580740][   T72]      ip6_route_output_flags+0x251/0x460
[ 1781.580740][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1781.580740][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1781.580740][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1781.580740][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1781.580740][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1781.580740][   T72]      __sys_connect+0x217/0x2a0
[ 1781.580740][   T72]      __x64_sys_connect+0x72/0xb0
[ 1781.580740][   T72]      do_syscall_64+0xc6/0x1e0
[ 1781.580740][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1781.580740][   T72] 
[ 1791.820702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1791.821159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1791.821159][   T72]      netdev_get_by_index+0x5e/0x80
[ 1791.821159][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1791.821159][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1791.821159][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1791.821159][   T72]      ipv6_add_addr+0x411/0x2000
[ 1791.821159][   T72]      inet6_addr_add+0x30e/0xa40
[ 1791.821159][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1791.821159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.821159][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.821159][   T72]      netlink_unicast+0x449/0x710
[ 1791.821159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.821159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.821159][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.821159][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.821159][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.821159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.821159][   T72] 
[ 1791.823613][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1791.823613][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1791.823613][   T72]      ipv6_find_idev+0x102/0x170
[ 1791.823613][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1791.823613][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.823613][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.823613][   T72]      netlink_unicast+0x449/0x710
[ 1791.823613][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.823613][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.823613][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.823613][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.823613][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.823613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.823613][   T72] 
[ 1791.825488][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1791.825488][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1791.825488][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1791.825488][   T72]      ipv6_find_idev+0x102/0x170
[ 1791.825488][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1791.825488][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.825488][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.825488][   T72]      netlink_unicast+0x449/0x710
[ 1791.825488][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.825488][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.825488][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.825488][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.825488][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.825488][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.825488][   T72] 
[ 1791.827541][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1791.827881][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1791.827881][   T72]      netdev_get_by_index+0x5e/0x80
[ 1791.827881][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1791.827881][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1791.827881][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1791.827881][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1791.827881][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1791.827881][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1791.827881][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1791.827881][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1791.827881][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1791.827881][   T72]      vfs_write+0x9e5/0x10a0
[ 1791.827881][   T72]      ksys_write+0xf5/0x1e0
[ 1791.827881][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.827881][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.827881][   T72] 
[ 1791.830148][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1791.830148][   T72]      netdev_get_by_index+0x5e/0x80
[ 1791.830148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1791.830148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1791.830148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1791.830148][   T72]      ipv6_add_addr+0x411/0x2000
[ 1791.830148][   T72]      inet6_addr_add+0x30e/0xa40
[ 1791.830148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1791.830148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.830148][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.830148][   T72]      netlink_unicast+0x449/0x710
[ 1791.830148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.830148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.830148][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.830148][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.830148][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.830148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.830148][   T72] 
[ 1791.832589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1791.832589][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1791.832589][   T72]      ipv6_find_idev+0x102/0x170
[ 1791.832589][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1791.832589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.832589][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.832589][   T72]      netlink_unicast+0x449/0x710
[ 1791.832589][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.832589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.832589][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.832589][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.832589][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.832589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.832589][   T72] 
[ 1791.834451][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1791.834451][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1791.834451][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1791.834451][   T72]      ipv6_find_idev+0x102/0x170
[ 1791.834451][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1791.834451][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1791.834451][   T72]      netlink_rcv_skb+0x130/0x360
[ 1791.834451][   T72]      netlink_unicast+0x449/0x710
[ 1791.834451][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1791.834451][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1791.834451][   T72]      ___sys_sendmsg+0xee/0x170
[ 1791.834451][   T72]      __sys_sendmsg+0xcd/0x170
[ 1791.834451][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.834451][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.834451][   T72] 
[ 1791.836496][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1791.836796][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1791.836796][   T72]      dst_init+0x84/0x4a0
[ 1791.836796][   T72]      dst_alloc+0x97/0x150
[ 1791.836796][   T72]      ip6_dst_alloc+0x23/0x90
[ 1791.836796][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1791.836796][   T72]      ip6_pol_route+0x56f/0x840
[ 1791.836796][   T72]      fib6_rule_lookup+0x227/0x600
[ 1791.836796][   T72]      ip6_route_output_flags+0x251/0x460
[ 1791.836796][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1791.836796][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1791.836796][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1791.836796][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1791.836796][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1791.836796][   T72]      __sys_connect+0x217/0x2a0
[ 1791.836796][   T72]      __x64_sys_connect+0x72/0xb0
[ 1791.836796][   T72]      do_syscall_64+0xc6/0x1e0
[ 1791.836796][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1791.836796][   T72] 
[ 1802.076698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1802.077155][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1802.077155][   T72]      netdev_get_by_index+0x5e/0x80
[ 1802.077155][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1802.077155][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1802.077155][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1802.077155][   T72]      ipv6_add_addr+0x411/0x2000
[ 1802.077155][   T72]      inet6_addr_add+0x30e/0xa40
[ 1802.077155][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1802.077155][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.077155][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.077155][   T72]      netlink_unicast+0x449/0x710
[ 1802.077155][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.077155][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.077155][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.077155][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.077155][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.077155][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.077155][   T72] 
[ 1802.079620][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1802.079620][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1802.079620][   T72]      ipv6_find_idev+0x102/0x170
[ 1802.079620][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1802.079620][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.079620][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.079620][   T72]      netlink_unicast+0x449/0x710
[ 1802.079620][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.079620][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.079620][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.079620][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.079620][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.079620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.079620][   T72] 
[ 1802.081496][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1802.081496][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1802.081496][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1802.081496][   T72]      ipv6_find_idev+0x102/0x170
[ 1802.081496][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1802.081496][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.081496][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.081496][   T72]      netlink_unicast+0x449/0x710
[ 1802.081496][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.081496][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.081496][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.081496][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.081496][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.081496][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.081496][   T72] 
[ 1802.083572][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1802.083914][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1802.083914][   T72]      netdev_get_by_index+0x5e/0x80
[ 1802.083914][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1802.083914][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1802.083914][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1802.083914][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1802.083914][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1802.083914][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1802.083914][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1802.083914][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1802.083914][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1802.083914][   T72]      vfs_write+0x9e5/0x10a0
[ 1802.083914][   T72]      ksys_write+0xf5/0x1e0
[ 1802.083914][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.083914][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.083914][   T72] 
[ 1802.086189][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1802.086189][   T72]      netdev_get_by_index+0x5e/0x80
[ 1802.086189][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1802.086189][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1802.086189][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1802.086189][   T72]      ipv6_add_addr+0x411/0x2000
[ 1802.086189][   T72]      inet6_addr_add+0x30e/0xa40
[ 1802.086189][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1802.086189][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.086189][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.086189][   T72]      netlink_unicast+0x449/0x710
[ 1802.086189][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.086189][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.086189][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.086189][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.086189][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.086189][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.086189][   T72] 
[ 1802.088621][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1802.088621][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1802.088621][   T72]      ipv6_find_idev+0x102/0x170
[ 1802.088621][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1802.088621][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.088621][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.088621][   T72]      netlink_unicast+0x449/0x710
[ 1802.088621][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.088621][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.088621][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.088621][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.088621][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.088621][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.088621][   T72] 
[ 1802.090508][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1802.090508][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1802.090508][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1802.090508][   T72]      ipv6_find_idev+0x102/0x170
[ 1802.090508][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1802.090508][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1802.090508][   T72]      netlink_rcv_skb+0x130/0x360
[ 1802.090508][   T72]      netlink_unicast+0x449/0x710
[ 1802.090508][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1802.090508][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1802.090508][   T72]      ___sys_sendmsg+0xee/0x170
[ 1802.090508][   T72]      __sys_sendmsg+0xcd/0x170
[ 1802.090508][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.090508][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.090508][   T72] 
[ 1802.092581][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1802.092882][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1802.092882][   T72]      dst_init+0x84/0x4a0
[ 1802.092882][   T72]      dst_alloc+0x97/0x150
[ 1802.092882][   T72]      ip6_dst_alloc+0x23/0x90
[ 1802.092882][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1802.092882][   T72]      ip6_pol_route+0x56f/0x840
[ 1802.092882][   T72]      fib6_rule_lookup+0x227/0x600
[ 1802.092882][   T72]      ip6_route_output_flags+0x251/0x460
[ 1802.092882][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1802.092882][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1802.092882][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1802.092882][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1802.092882][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1802.092882][   T72]      __sys_connect+0x217/0x2a0
[ 1802.092882][   T72]      __x64_sys_connect+0x72/0xb0
[ 1802.092882][   T72]      do_syscall_64+0xc6/0x1e0
[ 1802.092882][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1802.092882][   T72] 
[ 1812.332707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1812.333162][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1812.333162][   T72]      netdev_get_by_index+0x5e/0x80
[ 1812.333162][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1812.333162][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1812.333162][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1812.333162][   T72]      ipv6_add_addr+0x411/0x2000
[ 1812.333162][   T72]      inet6_addr_add+0x30e/0xa40
[ 1812.333162][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1812.333162][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.333162][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.333162][   T72]      netlink_unicast+0x449/0x710
[ 1812.333162][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.333162][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.333162][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.333162][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.333162][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.333162][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.333162][   T72] 
[ 1812.335608][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1812.335608][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1812.335608][   T72]      ipv6_find_idev+0x102/0x170
[ 1812.335608][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1812.335608][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.335608][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.335608][   T72]      netlink_unicast+0x449/0x710
[ 1812.335608][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.335608][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.335608][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.335608][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.335608][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.335608][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.335608][   T72] 
[ 1812.337482][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1812.337482][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1812.337482][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1812.337482][   T72]      ipv6_find_idev+0x102/0x170
[ 1812.337482][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1812.337482][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.337482][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.337482][   T72]      netlink_unicast+0x449/0x710
[ 1812.337482][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.337482][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.337482][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.337482][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.337482][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.337482][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.337482][   T72] 
[ 1812.339548][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1812.339895][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1812.339895][   T72]      netdev_get_by_index+0x5e/0x80
[ 1812.339895][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1812.339895][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1812.339895][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1812.339895][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1812.339895][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1812.339895][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1812.339895][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1812.339895][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1812.339895][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1812.339895][   T72]      vfs_write+0x9e5/0x10a0
[ 1812.339895][   T72]      ksys_write+0xf5/0x1e0
[ 1812.339895][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.339895][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.339895][   T72] 
[ 1812.342163][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1812.342163][   T72]      netdev_get_by_index+0x5e/0x80
[ 1812.342163][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1812.342163][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1812.342163][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1812.342163][   T72]      ipv6_add_addr+0x411/0x2000
[ 1812.342163][   T72]      inet6_addr_add+0x30e/0xa40
[ 1812.342163][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1812.342163][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.342163][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.342163][   T72]      netlink_unicast+0x449/0x710
[ 1812.342163][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.342163][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.342163][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.342163][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.342163][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.342163][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.342163][   T72] 
[ 1812.344596][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1812.344596][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1812.344596][   T72]      ipv6_find_idev+0x102/0x170
[ 1812.344596][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1812.344596][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.344596][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.344596][   T72]      netlink_unicast+0x449/0x710
[ 1812.344596][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.344596][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.344596][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.344596][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.344596][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.344596][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.344596][   T72] 
[ 1812.346460][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1812.346460][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1812.346460][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1812.346460][   T72]      ipv6_find_idev+0x102/0x170
[ 1812.346460][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1812.346460][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1812.346460][   T72]      netlink_rcv_skb+0x130/0x360
[ 1812.346460][   T72]      netlink_unicast+0x449/0x710
[ 1812.346460][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1812.346460][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1812.346460][   T72]      ___sys_sendmsg+0xee/0x170
[ 1812.346460][   T72]      __sys_sendmsg+0xcd/0x170
[ 1812.346460][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.346460][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.346460][   T72] 
[ 1812.348511][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1812.349252][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1812.349252][   T72]      dst_init+0x84/0x4a0
[ 1812.349252][   T72]      dst_alloc+0x97/0x150
[ 1812.349252][   T72]      ip6_dst_alloc+0x23/0x90
[ 1812.349252][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1812.349252][   T72]      ip6_pol_route+0x56f/0x840
[ 1812.349252][   T72]      fib6_rule_lookup+0x227/0x600
[ 1812.349252][   T72]      ip6_route_output_flags+0x251/0x460
[ 1812.349252][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1812.349252][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1812.349252][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1812.349252][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1812.349252][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1812.349252][   T72]      __sys_connect+0x217/0x2a0
[ 1812.349252][   T72]      __x64_sys_connect+0x72/0xb0
[ 1812.349252][   T72]      do_syscall_64+0xc6/0x1e0
[ 1812.349252][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1812.349252][   T72] 
[ 1822.588731][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1822.589185][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1822.589185][   T72]      netdev_get_by_index+0x5e/0x80
[ 1822.589185][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1822.589185][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1822.589185][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1822.589185][   T72]      ipv6_add_addr+0x411/0x2000
[ 1822.589185][   T72]      inet6_addr_add+0x30e/0xa40
[ 1822.589185][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1822.589185][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.589185][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.589185][   T72]      netlink_unicast+0x449/0x710
[ 1822.589185][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.589185][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.589185][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.589185][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.589185][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.589185][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.589185][   T72] 
[ 1822.591654][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1822.591654][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1822.591654][   T72]      ipv6_find_idev+0x102/0x170
[ 1822.591654][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1822.591654][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.591654][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.591654][   T72]      netlink_unicast+0x449/0x710
[ 1822.591654][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.591654][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.591654][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.591654][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.591654][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.591654][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.591654][   T72] 
[ 1822.593538][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1822.593538][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1822.593538][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1822.593538][   T72]      ipv6_find_idev+0x102/0x170
[ 1822.593538][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1822.593538][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.593538][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.593538][   T72]      netlink_unicast+0x449/0x710
[ 1822.593538][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.593538][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.593538][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.593538][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.593538][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.593538][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.593538][   T72] 
[ 1822.595611][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1822.595935][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1822.595935][   T72]      netdev_get_by_index+0x5e/0x80
[ 1822.595935][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1822.595935][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1822.595935][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1822.595935][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1822.595935][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1822.595935][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1822.595935][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1822.595935][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1822.595935][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1822.595935][   T72]      vfs_write+0x9e5/0x10a0
[ 1822.595935][   T72]      ksys_write+0xf5/0x1e0
[ 1822.595935][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.595935][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.595935][   T72] 
[ 1822.598207][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1822.598207][   T72]      netdev_get_by_index+0x5e/0x80
[ 1822.598207][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1822.598207][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1822.598207][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1822.598207][   T72]      ipv6_add_addr+0x411/0x2000
[ 1822.598207][   T72]      inet6_addr_add+0x30e/0xa40
[ 1822.598207][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1822.598207][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.598207][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.598207][   T72]      netlink_unicast+0x449/0x710
[ 1822.598207][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.598207][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.598207][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.598207][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.598207][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.598207][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.598207][   T72] 
[ 1822.600644][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1822.600644][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1822.600644][   T72]      ipv6_find_idev+0x102/0x170
[ 1822.600644][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1822.600644][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.600644][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.600644][   T72]      netlink_unicast+0x449/0x710
[ 1822.600644][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.600644][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.600644][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.600644][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.600644][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.600644][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.600644][   T72] 
[ 1822.602535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1822.602535][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1822.602535][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1822.602535][   T72]      ipv6_find_idev+0x102/0x170
[ 1822.602535][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1822.602535][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1822.602535][   T72]      netlink_rcv_skb+0x130/0x360
[ 1822.602535][   T72]      netlink_unicast+0x449/0x710
[ 1822.602535][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1822.602535][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1822.602535][   T72]      ___sys_sendmsg+0xee/0x170
[ 1822.602535][   T72]      __sys_sendmsg+0xcd/0x170
[ 1822.602535][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.602535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.602535][   T72] 
[ 1822.604603][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1822.604890][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1822.604890][   T72]      dst_init+0x84/0x4a0
[ 1822.604890][   T72]      dst_alloc+0x97/0x150
[ 1822.604890][   T72]      ip6_dst_alloc+0x23/0x90
[ 1822.604890][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1822.604890][   T72]      ip6_pol_route+0x56f/0x840
[ 1822.604890][   T72]      fib6_rule_lookup+0x227/0x600
[ 1822.604890][   T72]      ip6_route_output_flags+0x251/0x460
[ 1822.604890][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1822.604890][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1822.604890][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1822.604890][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1822.604890][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1822.604890][   T72]      __sys_connect+0x217/0x2a0
[ 1822.604890][   T72]      __x64_sys_connect+0x72/0xb0
[ 1822.604890][   T72]      do_syscall_64+0xc6/0x1e0
[ 1822.604890][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1822.604890][   T72] 
[ 1832.844701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1832.845158][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1832.845158][   T72]      netdev_get_by_index+0x5e/0x80
[ 1832.845158][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1832.845158][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1832.845158][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1832.845158][   T72]      ipv6_add_addr+0x411/0x2000
[ 1832.845158][   T72]      inet6_addr_add+0x30e/0xa40
[ 1832.845158][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1832.845158][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.845158][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.845158][   T72]      netlink_unicast+0x449/0x710
[ 1832.845158][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.845158][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.845158][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.845158][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.845158][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.845158][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.845158][   T72] 
[ 1832.848101][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1832.848101][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1832.848101][   T72]      ipv6_find_idev+0x102/0x170
[ 1832.848101][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1832.848101][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.848101][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.848101][   T72]      netlink_unicast+0x449/0x710
[ 1832.848101][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.848101][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.848101][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.848101][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.848101][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.848101][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.848101][   T72] 
[ 1832.849959][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1832.849959][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1832.849959][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1832.849959][   T72]      ipv6_find_idev+0x102/0x170
[ 1832.849959][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1832.849959][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.849959][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.849959][   T72]      netlink_unicast+0x449/0x710
[ 1832.849959][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.849959][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.849959][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.849959][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.849959][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.849959][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.849959][   T72] 
[ 1832.852011][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1832.852335][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1832.852335][   T72]      netdev_get_by_index+0x5e/0x80
[ 1832.852335][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1832.852335][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1832.852335][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1832.852335][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1832.852335][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1832.852335][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1832.852335][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1832.852335][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1832.852335][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1832.852335][   T72]      vfs_write+0x9e5/0x10a0
[ 1832.852335][   T72]      ksys_write+0xf5/0x1e0
[ 1832.852335][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.852335][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.852335][   T72] 
[ 1832.854569][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1832.854569][   T72]      netdev_get_by_index+0x5e/0x80
[ 1832.854569][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1832.854569][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1832.854569][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1832.854569][   T72]      ipv6_add_addr+0x411/0x2000
[ 1832.854569][   T72]      inet6_addr_add+0x30e/0xa40
[ 1832.854569][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1832.854569][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.854569][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.854569][   T72]      netlink_unicast+0x449/0x710
[ 1832.854569][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.854569][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.854569][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.854569][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.854569][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.854569][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.854569][   T72] 
[ 1832.858919][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1832.858919][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1832.858919][   T72]      ipv6_find_idev+0x102/0x170
[ 1832.858919][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1832.858919][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.858919][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.858919][   T72]      netlink_unicast+0x449/0x710
[ 1832.858919][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.858919][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.858919][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.858919][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.858919][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.858919][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.858919][   T72] 
[ 1832.860795][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1832.860795][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1832.860795][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1832.860795][   T72]      ipv6_find_idev+0x102/0x170
[ 1832.860795][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1832.860795][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1832.860795][   T72]      netlink_rcv_skb+0x130/0x360
[ 1832.860795][   T72]      netlink_unicast+0x449/0x710
[ 1832.860795][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1832.860795][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1832.860795][   T72]      ___sys_sendmsg+0xee/0x170
[ 1832.860795][   T72]      __sys_sendmsg+0xcd/0x170
[ 1832.860795][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.860795][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.860795][   T72] 
[ 1832.862869][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1832.863165][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1832.863165][   T72]      dst_init+0x84/0x4a0
[ 1832.863165][   T72]      dst_alloc+0x97/0x150
[ 1832.863165][   T72]      ip6_dst_alloc+0x23/0x90
[ 1832.863165][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1832.863165][   T72]      ip6_pol_route+0x56f/0x840
[ 1832.863165][   T72]      fib6_rule_lookup+0x227/0x600
[ 1832.863165][   T72]      ip6_route_output_flags+0x251/0x460
[ 1832.863165][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1832.863165][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1832.863165][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1832.863165][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1832.863165][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1832.863165][   T72]      __sys_connect+0x217/0x2a0
[ 1832.863165][   T72]      __x64_sys_connect+0x72/0xb0
[ 1832.863165][   T72]      do_syscall_64+0xc6/0x1e0
[ 1832.863165][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1832.863165][   T72] 
[ 1843.108707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1843.109150][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1843.109150][   T72]      netdev_get_by_index+0x5e/0x80
[ 1843.109150][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1843.109150][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1843.109150][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1843.109150][   T72]      ipv6_add_addr+0x411/0x2000
[ 1843.109150][   T72]      inet6_addr_add+0x30e/0xa40
[ 1843.109150][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1843.109150][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.109150][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.109150][   T72]      netlink_unicast+0x449/0x710
[ 1843.109150][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.109150][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.109150][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.109150][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.109150][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.109150][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.109150][   T72] 
[ 1843.111351][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1843.111351][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1843.111351][   T72]      ipv6_find_idev+0x102/0x170
[ 1843.111351][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1843.111351][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.111351][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.111351][   T72]      netlink_unicast+0x449/0x710
[ 1843.111351][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.111351][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.111351][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.111351][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.111351][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.111351][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.111351][   T72] 
[ 1843.113044][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1843.113044][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1843.113044][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1843.113044][   T72]      ipv6_find_idev+0x102/0x170
[ 1843.113044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1843.113044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.113044][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.113044][   T72]      netlink_unicast+0x449/0x710
[ 1843.113044][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.113044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.113044][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.113044][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.113044][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.113044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.113044][   T72] 
[ 1843.114887][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1843.115184][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1843.115184][   T72]      netdev_get_by_index+0x5e/0x80
[ 1843.115184][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1843.115184][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1843.115184][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1843.115184][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1843.115184][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1843.115184][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1843.115184][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1843.115184][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1843.115184][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1843.115184][   T72]      vfs_write+0x9e5/0x10a0
[ 1843.115184][   T72]      ksys_write+0xf5/0x1e0
[ 1843.115184][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.115184][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.115184][   T72] 
[ 1843.117297][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1843.117297][   T72]      netdev_get_by_index+0x5e/0x80
[ 1843.117297][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1843.117297][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1843.117297][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1843.117297][   T72]      ipv6_add_addr+0x411/0x2000
[ 1843.117297][   T72]      inet6_addr_add+0x30e/0xa40
[ 1843.117297][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1843.117297][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.117297][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.117297][   T72]      netlink_unicast+0x449/0x710
[ 1843.117297][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.117297][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.117297][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.117297][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.117297][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.117297][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.117297][   T72] 
[ 1843.119260][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1843.119260][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1843.119260][   T72]      ipv6_find_idev+0x102/0x170
[ 1843.119260][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1843.119260][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.119260][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.119260][   T72]      netlink_unicast+0x449/0x710
[ 1843.119260][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.119260][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.119260][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.119260][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.119260][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.119260][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.119260][   T72] 
[ 1843.120769][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1843.120769][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1843.120769][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1843.120769][   T72]      ipv6_find_idev+0x102/0x170
[ 1843.120769][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1843.120769][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1843.120769][   T72]      netlink_rcv_skb+0x130/0x360
[ 1843.120769][   T72]      netlink_unicast+0x449/0x710
[ 1843.120769][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1843.120769][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1843.120769][   T72]      ___sys_sendmsg+0xee/0x170
[ 1843.120769][   T72]      __sys_sendmsg+0xcd/0x170
[ 1843.120769][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.120769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.120769][   T72] 
[ 1843.122434][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1843.122678][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1843.122678][   T72]      dst_init+0x84/0x4a0
[ 1843.122678][   T72]      dst_alloc+0x97/0x150
[ 1843.122678][   T72]      ip6_dst_alloc+0x23/0x90
[ 1843.122678][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1843.122678][   T72]      ip6_pol_route+0x56f/0x840
[ 1843.122678][   T72]      fib6_rule_lookup+0x227/0x600
[ 1843.122678][   T72]      ip6_route_output_flags+0x251/0x460
[ 1843.122678][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1843.122678][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1843.122678][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1843.122678][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1843.122678][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1843.122678][   T72]      __sys_connect+0x217/0x2a0
[ 1843.122678][   T72]      __x64_sys_connect+0x72/0xb0
[ 1843.122678][   T72]      do_syscall_64+0xc6/0x1e0
[ 1843.122678][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1843.122678][   T72] 
[ 1853.380694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1853.381133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1853.381133][   T72]      netdev_get_by_index+0x5e/0x80
[ 1853.381133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1853.381133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1853.381133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1853.381133][   T72]      ipv6_add_addr+0x411/0x2000
[ 1853.381133][   T72]      inet6_addr_add+0x30e/0xa40
[ 1853.381133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1853.381133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.381133][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.381133][   T72]      netlink_unicast+0x449/0x710
[ 1853.381133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.381133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.381133][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.381133][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.381133][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.381133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.381133][   T72] 
[ 1853.383135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1853.383135][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1853.383135][   T72]      ipv6_find_idev+0x102/0x170
[ 1853.383135][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1853.383135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.383135][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.383135][   T72]      netlink_unicast+0x449/0x710
[ 1853.383135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.383135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.383135][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.383135][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.383135][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.383135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.383135][   T72] 
[ 1853.384669][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1853.384669][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1853.384669][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1853.384669][   T72]      ipv6_find_idev+0x102/0x170
[ 1853.384669][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1853.384669][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.384669][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.384669][   T72]      netlink_unicast+0x449/0x710
[ 1853.384669][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.384669][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.384669][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.384669][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.384669][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.384669][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.384669][   T72] 
[ 1853.386325][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1853.386591][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1853.386591][   T72]      netdev_get_by_index+0x5e/0x80
[ 1853.386591][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1853.386591][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1853.386591][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1853.386591][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1853.386591][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1853.386591][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1853.386591][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1853.386591][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1853.386591][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1853.386591][   T72]      vfs_write+0x9e5/0x10a0
[ 1853.386591][   T72]      ksys_write+0xf5/0x1e0
[ 1853.386591][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.386591][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.386591][   T72] 
[ 1853.388401][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1853.388401][   T72]      netdev_get_by_index+0x5e/0x80
[ 1853.388401][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1853.388401][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1853.388401][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1853.388401][   T72]      ipv6_add_addr+0x411/0x2000
[ 1853.388401][   T72]      inet6_addr_add+0x30e/0xa40
[ 1853.388401][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1853.388401][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.388401][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.388401][   T72]      netlink_unicast+0x449/0x710
[ 1853.388401][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.388401][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.388401][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.388401][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.388401][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.388401][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.388401][   T72] 
[ 1853.390367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1853.390367][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1853.390367][   T72]      ipv6_find_idev+0x102/0x170
[ 1853.390367][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1853.390367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.390367][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.390367][   T72]      netlink_unicast+0x449/0x710
[ 1853.390367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.390367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.390367][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.390367][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.390367][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.390367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.390367][   T72] 
[ 1853.391890][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1853.391890][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1853.391890][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1853.391890][   T72]      ipv6_find_idev+0x102/0x170
[ 1853.391890][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1853.391890][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1853.391890][   T72]      netlink_rcv_skb+0x130/0x360
[ 1853.391890][   T72]      netlink_unicast+0x449/0x710
[ 1853.391890][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1853.391890][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1853.391890][   T72]      ___sys_sendmsg+0xee/0x170
[ 1853.391890][   T72]      __sys_sendmsg+0xcd/0x170
[ 1853.391890][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.391890][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.391890][   T72] 
[ 1853.393562][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1853.393810][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1853.393810][   T72]      dst_init+0x84/0x4a0
[ 1853.393810][   T72]      dst_alloc+0x97/0x150
[ 1853.393810][   T72]      ip6_dst_alloc+0x23/0x90
[ 1853.393810][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1853.393810][   T72]      ip6_pol_route+0x56f/0x840
[ 1853.393810][   T72]      fib6_rule_lookup+0x227/0x600
[ 1853.393810][   T72]      ip6_route_output_flags+0x251/0x460
[ 1853.393810][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1853.393810][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1853.393810][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1853.393810][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1853.393810][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1853.393810][   T72]      __sys_connect+0x217/0x2a0
[ 1853.393810][   T72]      __x64_sys_connect+0x72/0xb0
[ 1853.393810][   T72]      do_syscall_64+0xc6/0x1e0
[ 1853.393810][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1853.393810][   T72] 
[ 1863.636639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1863.637072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1863.637072][   T72]      netdev_get_by_index+0x5e/0x80
[ 1863.637072][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1863.637072][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1863.637072][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1863.637072][   T72]      ipv6_add_addr+0x411/0x2000
[ 1863.637072][   T72]      inet6_addr_add+0x30e/0xa40
[ 1863.637072][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1863.637072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.637072][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.637072][   T72]      netlink_unicast+0x449/0x710
[ 1863.637072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.637072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.637072][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.637072][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.637072][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.637072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.637072][   T72] 
[ 1863.639046][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1863.639046][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1863.639046][   T72]      ipv6_find_idev+0x102/0x170
[ 1863.639046][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1863.639046][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.639046][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.639046][   T72]      netlink_unicast+0x449/0x710
[ 1863.639046][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.639046][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.639046][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.639046][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.639046][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.639046][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.639046][   T72] 
[ 1863.640559][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1863.640559][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1863.640559][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1863.640559][   T72]      ipv6_find_idev+0x102/0x170
[ 1863.640559][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1863.640559][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.640559][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.640559][   T72]      netlink_unicast+0x449/0x710
[ 1863.640559][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.640559][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.640559][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.640559][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.640559][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.640559][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.640559][   T72] 
[ 1863.642287][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1863.642559][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1863.642559][   T72]      netdev_get_by_index+0x5e/0x80
[ 1863.642559][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1863.642559][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1863.642559][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1863.642559][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1863.642559][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1863.642559][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1863.642559][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1863.642559][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1863.642559][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1863.642559][   T72]      vfs_write+0x9e5/0x10a0
[ 1863.642559][   T72]      ksys_write+0xf5/0x1e0
[ 1863.642559][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.642559][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.642559][   T72] 
[ 1863.644387][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1863.644387][   T72]      netdev_get_by_index+0x5e/0x80
[ 1863.644387][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1863.644387][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1863.644387][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1863.644387][   T72]      ipv6_add_addr+0x411/0x2000
[ 1863.644387][   T72]      inet6_addr_add+0x30e/0xa40
[ 1863.644387][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1863.644387][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.644387][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.644387][   T72]      netlink_unicast+0x449/0x710
[ 1863.644387][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.644387][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.644387][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.644387][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.644387][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.644387][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.644387][   T72] 
[ 1863.646365][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1863.646365][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1863.646365][   T72]      ipv6_find_idev+0x102/0x170
[ 1863.646365][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1863.646365][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.646365][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.646365][   T72]      netlink_unicast+0x449/0x710
[ 1863.646365][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.646365][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.646365][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.646365][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.646365][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.646365][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.646365][   T72] 
[ 1863.647875][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1863.647875][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1863.647875][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1863.647875][   T72]      ipv6_find_idev+0x102/0x170
[ 1863.647875][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1863.647875][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1863.647875][   T72]      netlink_rcv_skb+0x130/0x360
[ 1863.647875][   T72]      netlink_unicast+0x449/0x710
[ 1863.647875][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1863.647875][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1863.647875][   T72]      ___sys_sendmsg+0xee/0x170
[ 1863.647875][   T72]      __sys_sendmsg+0xcd/0x170
[ 1863.647875][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.647875][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.647875][   T72] 
[ 1863.649551][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1863.649796][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1863.649796][   T72]      dst_init+0x84/0x4a0
[ 1863.649796][   T72]      dst_alloc+0x97/0x150
[ 1863.649796][   T72]      ip6_dst_alloc+0x23/0x90
[ 1863.649796][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1863.649796][   T72]      ip6_pol_route+0x56f/0x840
[ 1863.649796][   T72]      fib6_rule_lookup+0x227/0x600
[ 1863.649796][   T72]      ip6_route_output_flags+0x251/0x460
[ 1863.649796][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1863.649796][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1863.649796][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1863.649796][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1863.649796][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1863.649796][   T72]      __sys_connect+0x217/0x2a0
[ 1863.649796][   T72]      __x64_sys_connect+0x72/0xb0
[ 1863.649796][   T72]      do_syscall_64+0xc6/0x1e0
[ 1863.649796][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1863.649796][   T72] 
[ 1873.892701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1873.893068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1873.893068][   T72]      netdev_get_by_index+0x5e/0x80
[ 1873.893068][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1873.893068][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1873.893068][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1873.893068][   T72]      ipv6_add_addr+0x411/0x2000
[ 1873.893068][   T72]      inet6_addr_add+0x30e/0xa40
[ 1873.893068][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1873.893068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.893068][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.893068][   T72]      netlink_unicast+0x449/0x710
[ 1873.893068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.893068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.893068][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.893068][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.893068][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.893068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.893068][   T72] 
[ 1873.895072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1873.895072][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1873.895072][   T72]      ipv6_find_idev+0x102/0x170
[ 1873.895072][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1873.895072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.895072][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.895072][   T72]      netlink_unicast+0x449/0x710
[ 1873.895072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.895072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.895072][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.895072][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.895072][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.895072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.895072][   T72] 
[ 1873.896591][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1873.896591][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1873.896591][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1873.896591][   T72]      ipv6_find_idev+0x102/0x170
[ 1873.896591][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1873.896591][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.896591][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.896591][   T72]      netlink_unicast+0x449/0x710
[ 1873.896591][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.896591][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.896591][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.896591][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.896591][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.896591][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.896591][   T72] 
[ 1873.898249][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1873.898513][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1873.898513][   T72]      netdev_get_by_index+0x5e/0x80
[ 1873.898513][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1873.898513][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1873.898513][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1873.898513][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1873.898513][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1873.898513][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1873.898513][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1873.898513][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1873.898513][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1873.898513][   T72]      vfs_write+0x9e5/0x10a0
[ 1873.898513][   T72]      ksys_write+0xf5/0x1e0
[ 1873.898513][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.898513][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.898513][   T72] 
[ 1873.900352][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1873.900352][   T72]      netdev_get_by_index+0x5e/0x80
[ 1873.900352][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1873.900352][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1873.900352][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1873.900352][   T72]      ipv6_add_addr+0x411/0x2000
[ 1873.900352][   T72]      inet6_addr_add+0x30e/0xa40
[ 1873.900352][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1873.900352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.900352][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.900352][   T72]      netlink_unicast+0x449/0x710
[ 1873.900352][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.900352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.900352][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.900352][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.900352][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.900352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.900352][   T72] 
[ 1873.902594][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1873.902594][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1873.902594][   T72]      ipv6_find_idev+0x102/0x170
[ 1873.902594][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1873.902594][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.902594][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.902594][   T72]      netlink_unicast+0x449/0x710
[ 1873.902594][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.902594][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.902594][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.902594][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.902594][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.902594][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.902594][   T72] 
[ 1873.904117][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1873.904117][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1873.904117][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1873.904117][   T72]      ipv6_find_idev+0x102/0x170
[ 1873.904117][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1873.904117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1873.904117][   T72]      netlink_rcv_skb+0x130/0x360
[ 1873.904117][   T72]      netlink_unicast+0x449/0x710
[ 1873.904117][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1873.904117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1873.904117][   T72]      ___sys_sendmsg+0xee/0x170
[ 1873.904117][   T72]      __sys_sendmsg+0xcd/0x170
[ 1873.904117][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.904117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.904117][   T72] 
[ 1873.905795][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1873.906030][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1873.906030][   T72]      dst_init+0x84/0x4a0
[ 1873.906030][   T72]      dst_alloc+0x97/0x150
[ 1873.906030][   T72]      ip6_dst_alloc+0x23/0x90
[ 1873.906030][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1873.906030][   T72]      ip6_pol_route+0x56f/0x840
[ 1873.906030][   T72]      fib6_rule_lookup+0x227/0x600
[ 1873.906030][   T72]      ip6_route_output_flags+0x251/0x460
[ 1873.906030][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1873.906030][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1873.906030][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1873.906030][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1873.906030][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1873.906030][   T72]      __sys_connect+0x217/0x2a0
[ 1873.906030][   T72]      __x64_sys_connect+0x72/0xb0
[ 1873.906030][   T72]      do_syscall_64+0xc6/0x1e0
[ 1873.906030][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1873.906030][   T72] 
[ 1884.148707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1884.149156][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1884.149156][   T72]      netdev_get_by_index+0x5e/0x80
[ 1884.149156][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1884.149156][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1884.149156][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1884.149156][   T72]      ipv6_add_addr+0x411/0x2000
[ 1884.149156][   T72]      inet6_addr_add+0x30e/0xa40
[ 1884.149156][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1884.149156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.149156][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.149156][   T72]      netlink_unicast+0x449/0x710
[ 1884.149156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.149156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.149156][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.149156][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.149156][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.149156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.149156][   T72] 
[ 1884.151435][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1884.151435][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1884.151435][   T72]      ipv6_find_idev+0x102/0x170
[ 1884.151435][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1884.151435][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.151435][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.151435][   T72]      netlink_unicast+0x449/0x710
[ 1884.151435][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.151435][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.151435][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.151435][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.151435][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.151435][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.151435][   T72] 
[ 1884.152950][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1884.152950][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1884.152950][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1884.152950][   T72]      ipv6_find_idev+0x102/0x170
[ 1884.152950][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1884.152950][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.152950][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.152950][   T72]      netlink_unicast+0x449/0x710
[ 1884.152950][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.152950][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.152950][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.152950][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.152950][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.152950][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.152950][   T72] 
[ 1884.154611][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1884.154883][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1884.154883][   T72]      netdev_get_by_index+0x5e/0x80
[ 1884.154883][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1884.154883][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1884.154883][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1884.154883][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1884.154883][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1884.154883][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1884.154883][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1884.154883][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1884.154883][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1884.154883][   T72]      vfs_write+0x9e5/0x10a0
[ 1884.154883][   T72]      ksys_write+0xf5/0x1e0
[ 1884.154883][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.154883][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.154883][   T72] 
[ 1884.156695][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1884.156695][   T72]      netdev_get_by_index+0x5e/0x80
[ 1884.156695][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1884.156695][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1884.156695][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1884.156695][   T72]      ipv6_add_addr+0x411/0x2000
[ 1884.156695][   T72]      inet6_addr_add+0x30e/0xa40
[ 1884.156695][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1884.156695][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.156695][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.156695][   T72]      netlink_unicast+0x449/0x710
[ 1884.156695][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.156695][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.156695][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.156695][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.156695][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.156695][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.156695][   T72] 
[ 1884.158664][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1884.158664][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1884.158664][   T72]      ipv6_find_idev+0x102/0x170
[ 1884.158664][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1884.158664][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.158664][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.158664][   T72]      netlink_unicast+0x449/0x710
[ 1884.158664][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.158664][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.158664][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.158664][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.158664][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.158664][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.158664][   T72] 
[ 1884.160172][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1884.160172][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1884.160172][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1884.160172][   T72]      ipv6_find_idev+0x102/0x170
[ 1884.160172][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1884.160172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1884.160172][   T72]      netlink_rcv_skb+0x130/0x360
[ 1884.160172][   T72]      netlink_unicast+0x449/0x710
[ 1884.160172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1884.160172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1884.160172][   T72]      ___sys_sendmsg+0xee/0x170
[ 1884.160172][   T72]      __sys_sendmsg+0xcd/0x170
[ 1884.160172][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.160172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.160172][   T72] 
[ 1884.161944][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1884.162180][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1884.162180][   T72]      dst_init+0x84/0x4a0
[ 1884.162180][   T72]      dst_alloc+0x97/0x150
[ 1884.162180][   T72]      ip6_dst_alloc+0x23/0x90
[ 1884.162180][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1884.162180][   T72]      ip6_pol_route+0x56f/0x840
[ 1884.162180][   T72]      fib6_rule_lookup+0x227/0x600
[ 1884.162180][   T72]      ip6_route_output_flags+0x251/0x460
[ 1884.162180][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1884.162180][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1884.162180][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1884.162180][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1884.162180][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1884.162180][   T72]      __sys_connect+0x217/0x2a0
[ 1884.162180][   T72]      __x64_sys_connect+0x72/0xb0
[ 1884.162180][   T72]      do_syscall_64+0xc6/0x1e0
[ 1884.162180][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1884.162180][   T72] 
[ 1894.404695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1894.405069][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1894.405069][   T72]      netdev_get_by_index+0x5e/0x80
[ 1894.405069][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1894.405069][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1894.405069][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1894.405069][   T72]      ipv6_add_addr+0x411/0x2000
[ 1894.405069][   T72]      inet6_addr_add+0x30e/0xa40
[ 1894.405069][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1894.405069][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.405069][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.405069][   T72]      netlink_unicast+0x449/0x710
[ 1894.405069][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.405069][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.405069][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.405069][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.405069][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.405069][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.405069][   T72] 
[ 1894.407043][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1894.407043][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1894.407043][   T72]      ipv6_find_idev+0x102/0x170
[ 1894.407043][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1894.407043][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.407043][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.407043][   T72]      netlink_unicast+0x449/0x710
[ 1894.407043][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.407043][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.407043][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.407043][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.407043][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.407043][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.407043][   T72] 
[ 1894.408556][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1894.408556][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1894.408556][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1894.408556][   T72]      ipv6_find_idev+0x102/0x170
[ 1894.408556][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1894.408556][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.408556][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.408556][   T72]      netlink_unicast+0x449/0x710
[ 1894.408556][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.408556][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.408556][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.408556][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.408556][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.408556][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.408556][   T72] 
[ 1894.410224][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1894.410497][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1894.410497][   T72]      netdev_get_by_index+0x5e/0x80
[ 1894.410497][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1894.410497][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1894.410497][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1894.410497][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1894.410497][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1894.410497][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1894.410497][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1894.410497][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1894.410497][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1894.410497][   T72]      vfs_write+0x9e5/0x10a0
[ 1894.410497][   T72]      ksys_write+0xf5/0x1e0
[ 1894.410497][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.410497][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.410497][   T72] 
[ 1894.412312][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1894.412312][   T72]      netdev_get_by_index+0x5e/0x80
[ 1894.412312][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1894.412312][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1894.412312][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1894.412312][   T72]      ipv6_add_addr+0x411/0x2000
[ 1894.412312][   T72]      inet6_addr_add+0x30e/0xa40
[ 1894.412312][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1894.412312][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.412312][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.412312][   T72]      netlink_unicast+0x449/0x710
[ 1894.412312][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.412312][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.412312][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.412312][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.412312][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.412312][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.412312][   T72] 
[ 1894.414267][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1894.414267][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1894.414267][   T72]      ipv6_find_idev+0x102/0x170
[ 1894.414267][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1894.414267][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.414267][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.414267][   T72]      netlink_unicast+0x449/0x710
[ 1894.414267][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.414267][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.414267][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.414267][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.414267][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.414267][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.414267][   T72] 
[ 1894.415773][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1894.415773][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1894.415773][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1894.415773][   T72]      ipv6_find_idev+0x102/0x170
[ 1894.415773][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1894.415773][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1894.415773][   T72]      netlink_rcv_skb+0x130/0x360
[ 1894.415773][   T72]      netlink_unicast+0x449/0x710
[ 1894.415773][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1894.415773][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1894.415773][   T72]      ___sys_sendmsg+0xee/0x170
[ 1894.415773][   T72]      __sys_sendmsg+0xcd/0x170
[ 1894.415773][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.415773][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.415773][   T72] 
[ 1894.417427][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1894.417672][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1894.417672][   T72]      dst_init+0x84/0x4a0
[ 1894.417672][   T72]      dst_alloc+0x97/0x150
[ 1894.417672][   T72]      ip6_dst_alloc+0x23/0x90
[ 1894.417672][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1894.417672][   T72]      ip6_pol_route+0x56f/0x840
[ 1894.417672][   T72]      fib6_rule_lookup+0x227/0x600
[ 1894.417672][   T72]      ip6_route_output_flags+0x251/0x460
[ 1894.417672][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1894.417672][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1894.417672][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1894.417672][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1894.417672][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1894.417672][   T72]      __sys_connect+0x217/0x2a0
[ 1894.417672][   T72]      __x64_sys_connect+0x72/0xb0
[ 1894.417672][   T72]      do_syscall_64+0xc6/0x1e0
[ 1894.417672][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1894.417672][   T72] 
[ 1904.660699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1904.661077][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1904.661077][   T72]      netdev_get_by_index+0x5e/0x80
[ 1904.661077][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1904.661077][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1904.661077][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1904.661077][   T72]      ipv6_add_addr+0x411/0x2000
[ 1904.661077][   T72]      inet6_addr_add+0x30e/0xa40
[ 1904.661077][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1904.661077][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.661077][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.661077][   T72]      netlink_unicast+0x449/0x710
[ 1904.661077][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.661077][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.661077][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.661077][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.661077][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.661077][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.661077][   T72] 
[ 1904.663067][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1904.663067][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1904.663067][   T72]      ipv6_find_idev+0x102/0x170
[ 1904.663067][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1904.663067][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.663067][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.663067][   T72]      netlink_unicast+0x449/0x710
[ 1904.663067][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.663067][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.663067][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.663067][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.663067][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.663067][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.663067][   T72] 
[ 1904.664580][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1904.664580][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1904.664580][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1904.664580][   T72]      ipv6_find_idev+0x102/0x170
[ 1904.664580][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1904.664580][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.664580][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.664580][   T72]      netlink_unicast+0x449/0x710
[ 1904.664580][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.664580][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.664580][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.664580][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.664580][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.664580][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.664580][   T72] 
[ 1904.666240][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1904.666503][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1904.666503][   T72]      netdev_get_by_index+0x5e/0x80
[ 1904.666503][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1904.666503][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1904.666503][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1904.666503][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1904.666503][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1904.666503][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1904.666503][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1904.666503][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1904.666503][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1904.666503][   T72]      vfs_write+0x9e5/0x10a0
[ 1904.666503][   T72]      ksys_write+0xf5/0x1e0
[ 1904.666503][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.666503][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.666503][   T72] 
[ 1904.668432][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1904.668432][   T72]      netdev_get_by_index+0x5e/0x80
[ 1904.668432][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1904.668432][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1904.668432][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1904.668432][   T72]      ipv6_add_addr+0x411/0x2000
[ 1904.668432][   T72]      inet6_addr_add+0x30e/0xa40
[ 1904.668432][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1904.668432][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.668432][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.668432][   T72]      netlink_unicast+0x449/0x710
[ 1904.668432][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.668432][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.668432][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.668432][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.668432][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.668432][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.668432][   T72] 
[ 1904.670389][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1904.670389][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1904.670389][   T72]      ipv6_find_idev+0x102/0x170
[ 1904.670389][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1904.670389][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.670389][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.670389][   T72]      netlink_unicast+0x449/0x710
[ 1904.670389][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.670389][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.670389][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.670389][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.670389][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.670389][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.670389][   T72] 
[ 1904.671914][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1904.671914][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1904.671914][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1904.671914][   T72]      ipv6_find_idev+0x102/0x170
[ 1904.671914][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1904.671914][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1904.671914][   T72]      netlink_rcv_skb+0x130/0x360
[ 1904.671914][   T72]      netlink_unicast+0x449/0x710
[ 1904.671914][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1904.671914][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1904.671914][   T72]      ___sys_sendmsg+0xee/0x170
[ 1904.671914][   T72]      __sys_sendmsg+0xcd/0x170
[ 1904.671914][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.671914][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.671914][   T72] 
[ 1904.673560][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1904.673805][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1904.673805][   T72]      dst_init+0x84/0x4a0
[ 1904.673805][   T72]      dst_alloc+0x97/0x150
[ 1904.673805][   T72]      ip6_dst_alloc+0x23/0x90
[ 1904.673805][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1904.673805][   T72]      ip6_pol_route+0x56f/0x840
[ 1904.673805][   T72]      fib6_rule_lookup+0x227/0x600
[ 1904.673805][   T72]      ip6_route_output_flags+0x251/0x460
[ 1904.673805][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1904.673805][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1904.673805][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1904.673805][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1904.673805][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1904.673805][   T72]      __sys_connect+0x217/0x2a0
[ 1904.673805][   T72]      __x64_sys_connect+0x72/0xb0
[ 1904.673805][   T72]      do_syscall_64+0xc6/0x1e0
[ 1904.673805][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1904.673805][   T72] 
[ 1914.916637][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1914.917080][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1914.917080][   T72]      netdev_get_by_index+0x5e/0x80
[ 1914.917080][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1914.917080][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1914.917080][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1914.917080][   T72]      ipv6_add_addr+0x411/0x2000
[ 1914.917080][   T72]      inet6_addr_add+0x30e/0xa40
[ 1914.917080][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1914.917080][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.917080][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.917080][   T72]      netlink_unicast+0x449/0x710
[ 1914.917080][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.917080][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.917080][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.917080][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.917080][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.917080][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.917080][   T72] 
[ 1914.919075][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1914.919075][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1914.919075][   T72]      ipv6_find_idev+0x102/0x170
[ 1914.919075][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1914.919075][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.919075][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.919075][   T72]      netlink_unicast+0x449/0x710
[ 1914.919075][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.919075][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.919075][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.919075][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.919075][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.919075][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.919075][   T72] 
[ 1914.920595][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1914.920595][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1914.920595][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1914.920595][   T72]      ipv6_find_idev+0x102/0x170
[ 1914.920595][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1914.920595][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.920595][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.920595][   T72]      netlink_unicast+0x449/0x710
[ 1914.920595][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.920595][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.920595][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.920595][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.920595][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.920595][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.920595][   T72] 
[ 1914.922256][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1914.922523][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1914.922523][   T72]      netdev_get_by_index+0x5e/0x80
[ 1914.922523][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1914.922523][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1914.922523][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1914.922523][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1914.922523][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1914.922523][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1914.922523][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1914.922523][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1914.922523][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1914.922523][   T72]      vfs_write+0x9e5/0x10a0
[ 1914.922523][   T72]      ksys_write+0xf5/0x1e0
[ 1914.922523][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.922523][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.922523][   T72] 
[ 1914.924342][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1914.924342][   T72]      netdev_get_by_index+0x5e/0x80
[ 1914.924342][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1914.924342][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1914.924342][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1914.924342][   T72]      ipv6_add_addr+0x411/0x2000
[ 1914.924342][   T72]      inet6_addr_add+0x30e/0xa40
[ 1914.924342][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1914.924342][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.924342][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.924342][   T72]      netlink_unicast+0x449/0x710
[ 1914.924342][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.924342][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.924342][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.924342][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.924342][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.924342][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.924342][   T72] 
[ 1914.926301][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1914.926301][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1914.926301][   T72]      ipv6_find_idev+0x102/0x170
[ 1914.926301][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1914.926301][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.926301][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.926301][   T72]      netlink_unicast+0x449/0x710
[ 1914.926301][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.926301][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.926301][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.926301][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.926301][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.926301][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.926301][   T72] 
[ 1914.927814][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1914.927814][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1914.927814][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1914.927814][   T72]      ipv6_find_idev+0x102/0x170
[ 1914.927814][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1914.927814][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1914.927814][   T72]      netlink_rcv_skb+0x130/0x360
[ 1914.927814][   T72]      netlink_unicast+0x449/0x710
[ 1914.927814][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1914.927814][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1914.927814][   T72]      ___sys_sendmsg+0xee/0x170
[ 1914.927814][   T72]      __sys_sendmsg+0xcd/0x170
[ 1914.927814][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.927814][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.927814][   T72] 
[ 1914.929469][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1914.929720][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1914.929720][   T72]      dst_init+0x84/0x4a0
[ 1914.929720][   T72]      dst_alloc+0x97/0x150
[ 1914.929720][   T72]      ip6_dst_alloc+0x23/0x90
[ 1914.929720][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1914.929720][   T72]      ip6_pol_route+0x56f/0x840
[ 1914.929720][   T72]      fib6_rule_lookup+0x227/0x600
[ 1914.929720][   T72]      ip6_route_output_flags+0x251/0x460
[ 1914.929720][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1914.929720][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1914.929720][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1914.929720][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1914.929720][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1914.929720][   T72]      __sys_connect+0x217/0x2a0
[ 1914.929720][   T72]      __x64_sys_connect+0x72/0xb0
[ 1914.929720][   T72]      do_syscall_64+0xc6/0x1e0
[ 1914.929720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1914.929720][   T72] 
[ 1925.172722][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1925.173168][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1925.173168][   T72]      netdev_get_by_index+0x5e/0x80
[ 1925.173168][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1925.173168][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1925.173168][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1925.173168][   T72]      ipv6_add_addr+0x411/0x2000
[ 1925.173168][   T72]      inet6_addr_add+0x30e/0xa40
[ 1925.173168][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1925.173168][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.173168][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.173168][   T72]      netlink_unicast+0x449/0x710
[ 1925.173168][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.173168][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.173168][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.173168][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.173168][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.173168][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.173168][   T72] 
[ 1925.175130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1925.175130][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1925.175130][   T72]      ipv6_find_idev+0x102/0x170
[ 1925.175130][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1925.175130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.175130][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.175130][   T72]      netlink_unicast+0x449/0x710
[ 1925.175130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.175130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.175130][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.175130][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.175130][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.175130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.175130][   T72] 
[ 1925.176649][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1925.176649][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1925.176649][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1925.176649][   T72]      ipv6_find_idev+0x102/0x170
[ 1925.176649][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1925.176649][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.176649][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.176649][   T72]      netlink_unicast+0x449/0x710
[ 1925.176649][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.176649][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.176649][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.176649][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.176649][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.176649][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.176649][   T72] 
[ 1925.178296][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1925.178561][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1925.178561][   T72]      netdev_get_by_index+0x5e/0x80
[ 1925.178561][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1925.178561][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1925.178561][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1925.178561][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1925.178561][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1925.178561][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1925.178561][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1925.178561][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1925.178561][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1925.178561][   T72]      vfs_write+0x9e5/0x10a0
[ 1925.178561][   T72]      ksys_write+0xf5/0x1e0
[ 1925.178561][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.178561][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.178561][   T72] 
[ 1925.180367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1925.180367][   T72]      netdev_get_by_index+0x5e/0x80
[ 1925.180367][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1925.180367][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1925.180367][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1925.180367][   T72]      ipv6_add_addr+0x411/0x2000
[ 1925.180367][   T72]      inet6_addr_add+0x30e/0xa40
[ 1925.180367][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1925.180367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.180367][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.180367][   T72]      netlink_unicast+0x449/0x710
[ 1925.180367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.180367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.180367][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.180367][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.180367][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.180367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.180367][   T72] 
[ 1925.182323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1925.182323][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1925.182323][   T72]      ipv6_find_idev+0x102/0x170
[ 1925.182323][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1925.182323][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.182323][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.182323][   T72]      netlink_unicast+0x449/0x710
[ 1925.182323][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.182323][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.182323][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.182323][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.182323][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.182323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.182323][   T72] 
[ 1925.183827][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1925.183827][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1925.183827][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1925.183827][   T72]      ipv6_find_idev+0x102/0x170
[ 1925.183827][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1925.183827][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1925.183827][   T72]      netlink_rcv_skb+0x130/0x360
[ 1925.183827][   T72]      netlink_unicast+0x449/0x710
[ 1925.183827][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1925.183827][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1925.183827][   T72]      ___sys_sendmsg+0xee/0x170
[ 1925.183827][   T72]      __sys_sendmsg+0xcd/0x170
[ 1925.183827][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.183827][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.183827][   T72] 
[ 1925.185470][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1925.185718][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1925.185718][   T72]      dst_init+0x84/0x4a0
[ 1925.185718][   T72]      dst_alloc+0x97/0x150
[ 1925.185718][   T72]      ip6_dst_alloc+0x23/0x90
[ 1925.185718][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1925.185718][   T72]      ip6_pol_route+0x56f/0x840
[ 1925.185718][   T72]      fib6_rule_lookup+0x227/0x600
[ 1925.185718][   T72]      ip6_route_output_flags+0x251/0x460
[ 1925.185718][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1925.185718][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1925.185718][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1925.185718][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1925.185718][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1925.185718][   T72]      __sys_connect+0x217/0x2a0
[ 1925.185718][   T72]      __x64_sys_connect+0x72/0xb0
[ 1925.185718][   T72]      do_syscall_64+0xc6/0x1e0
[ 1925.185718][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1925.185718][   T72] 
[ 1935.428705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1935.429141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1935.429141][   T72]      netdev_get_by_index+0x5e/0x80
[ 1935.429141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1935.429141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1935.429141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1935.429141][   T72]      ipv6_add_addr+0x411/0x2000
[ 1935.429141][   T72]      inet6_addr_add+0x30e/0xa40
[ 1935.429141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1935.429141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.429141][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.429141][   T72]      netlink_unicast+0x449/0x710
[ 1935.429141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.429141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.429141][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.429141][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.429141][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.429141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.429141][   T72] 
[ 1935.431117][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1935.431117][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1935.431117][   T72]      ipv6_find_idev+0x102/0x170
[ 1935.431117][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1935.431117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.431117][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.431117][   T72]      netlink_unicast+0x449/0x710
[ 1935.431117][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.431117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.431117][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.431117][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.431117][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.431117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.431117][   T72] 
[ 1935.432622][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1935.432622][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1935.432622][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1935.432622][   T72]      ipv6_find_idev+0x102/0x170
[ 1935.432622][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1935.432622][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.432622][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.432622][   T72]      netlink_unicast+0x449/0x710
[ 1935.432622][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.432622][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.432622][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.432622][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.432622][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.432622][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.432622][   T72] 
[ 1935.434273][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1935.434535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1935.434535][   T72]      netdev_get_by_index+0x5e/0x80
[ 1935.434535][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1935.434535][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1935.434535][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1935.434535][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1935.434535][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1935.434535][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1935.434535][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1935.434535][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1935.434535][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1935.434535][   T72]      vfs_write+0x9e5/0x10a0
[ 1935.434535][   T72]      ksys_write+0xf5/0x1e0
[ 1935.434535][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.434535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.434535][   T72] 
[ 1935.436338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1935.436338][   T72]      netdev_get_by_index+0x5e/0x80
[ 1935.436338][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1935.436338][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1935.436338][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1935.436338][   T72]      ipv6_add_addr+0x411/0x2000
[ 1935.436338][   T72]      inet6_addr_add+0x30e/0xa40
[ 1935.436338][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1935.436338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.436338][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.436338][   T72]      netlink_unicast+0x449/0x710
[ 1935.436338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.436338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.436338][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.436338][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.436338][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.436338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.436338][   T72] 
[ 1935.438288][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1935.438288][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1935.438288][   T72]      ipv6_find_idev+0x102/0x170
[ 1935.438288][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1935.438288][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.438288][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.438288][   T72]      netlink_unicast+0x449/0x710
[ 1935.438288][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.438288][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.438288][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.438288][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.438288][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.438288][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.438288][   T72] 
[ 1935.439808][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1935.439808][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1935.439808][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1935.439808][   T72]      ipv6_find_idev+0x102/0x170
[ 1935.439808][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1935.439808][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1935.439808][   T72]      netlink_rcv_skb+0x130/0x360
[ 1935.439808][   T72]      netlink_unicast+0x449/0x710
[ 1935.439808][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1935.439808][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1935.439808][   T72]      ___sys_sendmsg+0xee/0x170
[ 1935.439808][   T72]      __sys_sendmsg+0xcd/0x170
[ 1935.439808][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.439808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.439808][   T72] 
[ 1935.441488][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1935.441740][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1935.441740][   T72]      dst_init+0x84/0x4a0
[ 1935.441740][   T72]      dst_alloc+0x97/0x150
[ 1935.441740][   T72]      ip6_dst_alloc+0x23/0x90
[ 1935.441740][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1935.441740][   T72]      ip6_pol_route+0x56f/0x840
[ 1935.441740][   T72]      fib6_rule_lookup+0x227/0x600
[ 1935.441740][   T72]      ip6_route_output_flags+0x251/0x460
[ 1935.441740][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1935.441740][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1935.441740][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1935.441740][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1935.441740][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1935.441740][   T72]      __sys_connect+0x217/0x2a0
[ 1935.441740][   T72]      __x64_sys_connect+0x72/0xb0
[ 1935.441740][   T72]      do_syscall_64+0xc6/0x1e0
[ 1935.441740][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1935.441740][   T72] 
[ 1945.468636][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1945.469005][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1945.469005][   T72]      netdev_get_by_index+0x5e/0x80
[ 1945.469005][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1945.469005][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1945.469005][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1945.469005][   T72]      ipv6_add_addr+0x411/0x2000
[ 1945.469005][   T72]      inet6_addr_add+0x30e/0xa40
[ 1945.469005][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1945.469005][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.469005][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.469005][   T72]      netlink_unicast+0x449/0x710
[ 1945.469005][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.469005][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.469005][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.469005][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.469005][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.469005][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.469005][   T72] 
[ 1945.470977][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1945.470977][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1945.470977][   T72]      ipv6_find_idev+0x102/0x170
[ 1945.470977][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1945.470977][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.470977][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.470977][   T72]      netlink_unicast+0x449/0x710
[ 1945.470977][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.470977][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.470977][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.470977][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.470977][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.470977][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.470977][   T72] 
[ 1945.472482][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1945.472482][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1945.472482][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1945.472482][   T72]      ipv6_find_idev+0x102/0x170
[ 1945.472482][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1945.472482][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.472482][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.472482][   T72]      netlink_unicast+0x449/0x710
[ 1945.472482][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.472482][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.472482][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.472482][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.472482][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.472482][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.472482][   T72] 
[ 1945.474126][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1945.474389][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1945.474389][   T72]      netdev_get_by_index+0x5e/0x80
[ 1945.474389][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1945.474389][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1945.474389][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1945.474389][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1945.474389][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1945.474389][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1945.474389][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1945.474389][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1945.474389][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1945.474389][   T72]      vfs_write+0x9e5/0x10a0
[ 1945.474389][   T72]      ksys_write+0xf5/0x1e0
[ 1945.474389][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.474389][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.474389][   T72] 
[ 1945.476196][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1945.476196][   T72]      netdev_get_by_index+0x5e/0x80
[ 1945.476196][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1945.476196][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1945.476196][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1945.476196][   T72]      ipv6_add_addr+0x411/0x2000
[ 1945.476196][   T72]      inet6_addr_add+0x30e/0xa40
[ 1945.476196][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1945.476196][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.476196][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.476196][   T72]      netlink_unicast+0x449/0x710
[ 1945.476196][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.476196][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.476196][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.476196][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.476196][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.476196][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.476196][   T72] 
[ 1945.478148][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1945.478148][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1945.478148][   T72]      ipv6_find_idev+0x102/0x170
[ 1945.478148][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1945.478148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.478148][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.478148][   T72]      netlink_unicast+0x449/0x710
[ 1945.478148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.478148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.478148][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.478148][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.478148][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.478148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.478148][   T72] 
[ 1945.479653][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1945.479653][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1945.479653][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1945.479653][   T72]      ipv6_find_idev+0x102/0x170
[ 1945.479653][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1945.479653][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1945.479653][   T72]      netlink_rcv_skb+0x130/0x360
[ 1945.479653][   T72]      netlink_unicast+0x449/0x710
[ 1945.479653][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1945.479653][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1945.479653][   T72]      ___sys_sendmsg+0xee/0x170
[ 1945.479653][   T72]      __sys_sendmsg+0xcd/0x170
[ 1945.479653][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.479653][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.479653][   T72] 
[ 1945.481305][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1945.481542][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1945.481542][   T72]      dst_init+0x84/0x4a0
[ 1945.481542][   T72]      dst_alloc+0x97/0x150
[ 1945.481542][   T72]      ip6_dst_alloc+0x23/0x90
[ 1945.481542][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1945.481542][   T72]      ip6_pol_route+0x56f/0x840
[ 1945.481542][   T72]      fib6_rule_lookup+0x227/0x600
[ 1945.481542][   T72]      ip6_route_output_flags+0x251/0x460
[ 1945.481542][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1945.481542][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1945.481542][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1945.481542][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1945.481542][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1945.481542][   T72]      __sys_connect+0x217/0x2a0
[ 1945.481542][   T72]      __x64_sys_connect+0x72/0xb0
[ 1945.481542][   T72]      do_syscall_64+0xc6/0x1e0
[ 1945.481542][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1945.481542][   T72] 
[ 1955.484716][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1955.485171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1955.485171][   T72]      netdev_get_by_index+0x5e/0x80
[ 1955.485171][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1955.485171][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1955.485171][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1955.485171][   T72]      ipv6_add_addr+0x411/0x2000
[ 1955.485171][   T72]      inet6_addr_add+0x30e/0xa40
[ 1955.485171][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1955.485171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.485171][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.485171][   T72]      netlink_unicast+0x449/0x710
[ 1955.485171][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.485171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.485171][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.485171][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.485171][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.485171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.485171][   T72] 
[ 1955.487197][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1955.487197][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1955.487197][   T72]      ipv6_find_idev+0x102/0x170
[ 1955.487197][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1955.487197][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.487197][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.487197][   T72]      netlink_unicast+0x449/0x710
[ 1955.487197][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.487197][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.487197][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.487197][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.487197][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.487197][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.487197][   T72] 
[ 1955.488738][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1955.488738][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1955.488738][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1955.488738][   T72]      ipv6_find_idev+0x102/0x170
[ 1955.488738][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1955.488738][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.488738][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.488738][   T72]      netlink_unicast+0x449/0x710
[ 1955.488738][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.488738][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.488738][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.488738][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.488738][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.488738][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.488738][   T72] 
[ 1955.490434][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1955.490716][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1955.490716][   T72]      netdev_get_by_index+0x5e/0x80
[ 1955.490716][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1955.490716][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1955.490716][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1955.490716][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1955.490716][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1955.490716][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1955.490716][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1955.490716][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1955.490716][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1955.490716][   T72]      vfs_write+0x9e5/0x10a0
[ 1955.490716][   T72]      ksys_write+0xf5/0x1e0
[ 1955.490716][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.490716][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.490716][   T72] 
[ 1955.492573][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1955.492573][   T72]      netdev_get_by_index+0x5e/0x80
[ 1955.492573][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1955.492573][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1955.492573][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1955.492573][   T72]      ipv6_add_addr+0x411/0x2000
[ 1955.492573][   T72]      inet6_addr_add+0x30e/0xa40
[ 1955.492573][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1955.492573][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.492573][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.492573][   T72]      netlink_unicast+0x449/0x710
[ 1955.492573][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.492573][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.492573][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.492573][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.492573][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.492573][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.492573][   T72] 
[ 1955.494555][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1955.494555][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1955.494555][   T72]      ipv6_find_idev+0x102/0x170
[ 1955.494555][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1955.494555][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.494555][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.494555][   T72]      netlink_unicast+0x449/0x710
[ 1955.494555][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.494555][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.494555][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.494555][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.494555][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.494555][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.494555][   T72] 
[ 1955.496084][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1955.496084][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1955.496084][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1955.496084][   T72]      ipv6_find_idev+0x102/0x170
[ 1955.496084][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1955.496084][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1955.496084][   T72]      netlink_rcv_skb+0x130/0x360
[ 1955.496084][   T72]      netlink_unicast+0x449/0x710
[ 1955.496084][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1955.496084][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1955.496084][   T72]      ___sys_sendmsg+0xee/0x170
[ 1955.496084][   T72]      __sys_sendmsg+0xcd/0x170
[ 1955.496084][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.496084][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.496084][   T72] 
[ 1955.497765][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1955.498014][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1955.498014][   T72]      dst_init+0x84/0x4a0
[ 1955.498014][   T72]      dst_alloc+0x97/0x150
[ 1955.498014][   T72]      ip6_dst_alloc+0x23/0x90
[ 1955.498014][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1955.498014][   T72]      ip6_pol_route+0x56f/0x840
[ 1955.498014][   T72]      fib6_rule_lookup+0x227/0x600
[ 1955.498014][   T72]      ip6_route_output_flags+0x251/0x460
[ 1955.498014][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1955.498014][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1955.498014][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1955.498014][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1955.498014][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1955.498014][   T72]      __sys_connect+0x217/0x2a0
[ 1955.498014][   T72]      __x64_sys_connect+0x72/0xb0
[ 1955.498014][   T72]      do_syscall_64+0xc6/0x1e0
[ 1955.498014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1955.498014][   T72] 
[ 1965.740706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1965.741150][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1965.741150][   T72]      netdev_get_by_index+0x5e/0x80
[ 1965.741150][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1965.741150][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1965.741150][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1965.741150][   T72]      ipv6_add_addr+0x411/0x2000
[ 1965.741150][   T72]      inet6_addr_add+0x30e/0xa40
[ 1965.741150][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1965.741150][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.741150][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.741150][   T72]      netlink_unicast+0x449/0x710
[ 1965.741150][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.741150][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.741150][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.741150][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.741150][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.741150][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.741150][   T72] 
[ 1965.743116][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1965.743116][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1965.743116][   T72]      ipv6_find_idev+0x102/0x170
[ 1965.743116][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1965.743116][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.743116][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.743116][   T72]      netlink_unicast+0x449/0x710
[ 1965.743116][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.743116][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.743116][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.743116][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.743116][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.743116][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.743116][   T72] 
[ 1965.744629][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1965.744629][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1965.744629][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1965.744629][   T72]      ipv6_find_idev+0x102/0x170
[ 1965.744629][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1965.744629][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.744629][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.744629][   T72]      netlink_unicast+0x449/0x710
[ 1965.744629][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.744629][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.744629][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.744629][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.744629][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.744629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.744629][   T72] 
[ 1965.746288][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1965.746555][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1965.746555][   T72]      netdev_get_by_index+0x5e/0x80
[ 1965.746555][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1965.746555][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1965.746555][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1965.746555][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1965.746555][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1965.746555][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1965.746555][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1965.746555][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1965.746555][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1965.746555][   T72]      vfs_write+0x9e5/0x10a0
[ 1965.746555][   T72]      ksys_write+0xf5/0x1e0
[ 1965.746555][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.746555][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.746555][   T72] 
[ 1965.748367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1965.748367][   T72]      netdev_get_by_index+0x5e/0x80
[ 1965.748367][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1965.748367][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1965.748367][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1965.748367][   T72]      ipv6_add_addr+0x411/0x2000
[ 1965.748367][   T72]      inet6_addr_add+0x30e/0xa40
[ 1965.748367][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1965.748367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.748367][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.748367][   T72]      netlink_unicast+0x449/0x710
[ 1965.748367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.748367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.748367][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.748367][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.748367][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.748367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.748367][   T72] 
[ 1965.750324][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1965.750324][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1965.750324][   T72]      ipv6_find_idev+0x102/0x170
[ 1965.750324][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1965.750324][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.750324][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.750324][   T72]      netlink_unicast+0x449/0x710
[ 1965.750324][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.750324][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.750324][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.750324][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.750324][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.750324][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.750324][   T72] 
[ 1965.751840][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1965.751840][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1965.751840][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1965.751840][   T72]      ipv6_find_idev+0x102/0x170
[ 1965.751840][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1965.751840][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1965.751840][   T72]      netlink_rcv_skb+0x130/0x360
[ 1965.751840][   T72]      netlink_unicast+0x449/0x710
[ 1965.751840][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1965.751840][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1965.751840][   T72]      ___sys_sendmsg+0xee/0x170
[ 1965.751840][   T72]      __sys_sendmsg+0xcd/0x170
[ 1965.751840][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.751840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.751840][   T72] 
[ 1965.753495][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1965.753741][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1965.753741][   T72]      dst_init+0x84/0x4a0
[ 1965.753741][   T72]      dst_alloc+0x97/0x150
[ 1965.753741][   T72]      ip6_dst_alloc+0x23/0x90
[ 1965.753741][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1965.753741][   T72]      ip6_pol_route+0x56f/0x840
[ 1965.753741][   T72]      fib6_rule_lookup+0x227/0x600
[ 1965.753741][   T72]      ip6_route_output_flags+0x251/0x460
[ 1965.753741][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1965.753741][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1965.753741][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1965.753741][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1965.753741][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1965.753741][   T72]      __sys_connect+0x217/0x2a0
[ 1965.753741][   T72]      __x64_sys_connect+0x72/0xb0
[ 1965.753741][   T72]      do_syscall_64+0xc6/0x1e0
[ 1965.753741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1965.753741][   T72] 
[ 1975.996729][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1975.997174][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1975.997174][   T72]      netdev_get_by_index+0x5e/0x80
[ 1975.997174][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1975.997174][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1975.997174][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1975.997174][   T72]      ipv6_add_addr+0x411/0x2000
[ 1975.997174][   T72]      inet6_addr_add+0x30e/0xa40
[ 1975.997174][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1975.997174][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1975.997174][   T72]      netlink_rcv_skb+0x130/0x360
[ 1975.997174][   T72]      netlink_unicast+0x449/0x710
[ 1975.997174][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1975.997174][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1975.997174][   T72]      ___sys_sendmsg+0xee/0x170
[ 1975.997174][   T72]      __sys_sendmsg+0xcd/0x170
[ 1975.997174][   T72]      do_syscall_64+0xc6/0x1e0
[ 1975.997174][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1975.997174][   T72] 
[ 1975.999146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1975.999146][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1975.999146][   T72]      ipv6_find_idev+0x102/0x170
[ 1975.999146][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1975.999146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1975.999146][   T72]      netlink_rcv_skb+0x130/0x360
[ 1975.999146][   T72]      netlink_unicast+0x449/0x710
[ 1975.999146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1975.999146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1975.999146][   T72]      ___sys_sendmsg+0xee/0x170
[ 1975.999146][   T72]      __sys_sendmsg+0xcd/0x170
[ 1975.999146][   T72]      do_syscall_64+0xc6/0x1e0
[ 1975.999146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1975.999146][   T72] 
[ 1976.000663][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1976.000663][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1976.000663][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1976.000663][   T72]      ipv6_find_idev+0x102/0x170
[ 1976.000663][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1976.000663][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1976.000663][   T72]      netlink_rcv_skb+0x130/0x360
[ 1976.000663][   T72]      netlink_unicast+0x449/0x710
[ 1976.000663][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1976.000663][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1976.000663][   T72]      ___sys_sendmsg+0xee/0x170
[ 1976.000663][   T72]      __sys_sendmsg+0xcd/0x170
[ 1976.000663][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.000663][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.000663][   T72] 
[ 1976.002328][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1976.002596][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1976.002596][   T72]      netdev_get_by_index+0x5e/0x80
[ 1976.002596][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1976.002596][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1976.002596][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1976.002596][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1976.002596][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1976.002596][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1976.002596][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1976.002596][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1976.002596][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1976.002596][   T72]      vfs_write+0x9e5/0x10a0
[ 1976.002596][   T72]      ksys_write+0xf5/0x1e0
[ 1976.002596][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.002596][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.002596][   T72] 
[ 1976.004413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1976.004413][   T72]      netdev_get_by_index+0x5e/0x80
[ 1976.004413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1976.004413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1976.004413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1976.004413][   T72]      ipv6_add_addr+0x411/0x2000
[ 1976.004413][   T72]      inet6_addr_add+0x30e/0xa40
[ 1976.004413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1976.004413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1976.004413][   T72]      netlink_rcv_skb+0x130/0x360
[ 1976.004413][   T72]      netlink_unicast+0x449/0x710
[ 1976.004413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1976.004413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1976.004413][   T72]      ___sys_sendmsg+0xee/0x170
[ 1976.004413][   T72]      __sys_sendmsg+0xcd/0x170
[ 1976.004413][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.004413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.004413][   T72] 
[ 1976.006386][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1976.006386][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1976.006386][   T72]      ipv6_find_idev+0x102/0x170
[ 1976.006386][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1976.006386][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1976.006386][   T72]      netlink_rcv_skb+0x130/0x360
[ 1976.006386][   T72]      netlink_unicast+0x449/0x710
[ 1976.006386][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1976.006386][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1976.006386][   T72]      ___sys_sendmsg+0xee/0x170
[ 1976.006386][   T72]      __sys_sendmsg+0xcd/0x170
[ 1976.006386][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.006386][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.006386][   T72] 
[ 1976.007896][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1976.007896][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1976.007896][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1976.007896][   T72]      ipv6_find_idev+0x102/0x170
[ 1976.007896][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1976.007896][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1976.007896][   T72]      netlink_rcv_skb+0x130/0x360
[ 1976.007896][   T72]      netlink_unicast+0x449/0x710
[ 1976.007896][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1976.007896][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1976.007896][   T72]      ___sys_sendmsg+0xee/0x170
[ 1976.007896][   T72]      __sys_sendmsg+0xcd/0x170
[ 1976.007896][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.007896][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.007896][   T72] 
[ 1976.009554][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1976.009800][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1976.009800][   T72]      dst_init+0x84/0x4a0
[ 1976.009800][   T72]      dst_alloc+0x97/0x150
[ 1976.009800][   T72]      ip6_dst_alloc+0x23/0x90
[ 1976.009800][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1976.009800][   T72]      ip6_pol_route+0x56f/0x840
[ 1976.009800][   T72]      fib6_rule_lookup+0x227/0x600
[ 1976.009800][   T72]      ip6_route_output_flags+0x251/0x460
[ 1976.009800][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1976.009800][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1976.009800][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1976.009800][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1976.009800][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1976.009800][   T72]      __sys_connect+0x217/0x2a0
[ 1976.009800][   T72]      __x64_sys_connect+0x72/0xb0
[ 1976.009800][   T72]      do_syscall_64+0xc6/0x1e0
[ 1976.009800][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1976.009800][   T72] 
[ 1986.252703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1986.253144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1986.253144][   T72]      netdev_get_by_index+0x5e/0x80
[ 1986.253144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1986.253144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1986.253144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1986.253144][   T72]      ipv6_add_addr+0x411/0x2000
[ 1986.253144][   T72]      inet6_addr_add+0x30e/0xa40
[ 1986.253144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1986.253144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.253144][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.253144][   T72]      netlink_unicast+0x449/0x710
[ 1986.253144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.253144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.253144][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.253144][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.253144][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.253144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.253144][   T72] 
[ 1986.255113][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1986.255113][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1986.255113][   T72]      ipv6_find_idev+0x102/0x170
[ 1986.255113][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1986.255113][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.255113][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.255113][   T72]      netlink_unicast+0x449/0x710
[ 1986.255113][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.255113][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.255113][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.255113][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.255113][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.255113][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.255113][   T72] 
[ 1986.256638][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1986.256638][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1986.256638][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1986.256638][   T72]      ipv6_find_idev+0x102/0x170
[ 1986.256638][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1986.256638][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.256638][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.256638][   T72]      netlink_unicast+0x449/0x710
[ 1986.256638][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.256638][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.256638][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.256638][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.256638][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.256638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.256638][   T72] 
[ 1986.258303][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1986.258576][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1986.258576][   T72]      netdev_get_by_index+0x5e/0x80
[ 1986.258576][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1986.258576][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1986.258576][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1986.258576][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1986.258576][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1986.258576][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1986.258576][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1986.258576][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1986.258576][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1986.258576][   T72]      vfs_write+0x9e5/0x10a0
[ 1986.258576][   T72]      ksys_write+0xf5/0x1e0
[ 1986.258576][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.258576][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.258576][   T72] 
[ 1986.260387][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1986.260387][   T72]      netdev_get_by_index+0x5e/0x80
[ 1986.260387][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1986.260387][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1986.260387][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1986.260387][   T72]      ipv6_add_addr+0x411/0x2000
[ 1986.260387][   T72]      inet6_addr_add+0x30e/0xa40
[ 1986.260387][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1986.260387][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.260387][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.260387][   T72]      netlink_unicast+0x449/0x710
[ 1986.260387][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.260387][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.260387][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.260387][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.260387][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.260387][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.260387][   T72] 
[ 1986.262377][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1986.262377][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1986.262377][   T72]      ipv6_find_idev+0x102/0x170
[ 1986.262377][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1986.262377][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.262377][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.262377][   T72]      netlink_unicast+0x449/0x710
[ 1986.262377][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.262377][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.262377][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.262377][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.262377][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.262377][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.262377][   T72] 
[ 1986.263899][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1986.263899][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1986.263899][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1986.263899][   T72]      ipv6_find_idev+0x102/0x170
[ 1986.263899][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1986.263899][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1986.263899][   T72]      netlink_rcv_skb+0x130/0x360
[ 1986.263899][   T72]      netlink_unicast+0x449/0x710
[ 1986.263899][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1986.263899][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1986.263899][   T72]      ___sys_sendmsg+0xee/0x170
[ 1986.263899][   T72]      __sys_sendmsg+0xcd/0x170
[ 1986.263899][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.263899][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.263899][   T72] 
[ 1986.265568][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1986.265824][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1986.265824][   T72]      dst_init+0x84/0x4a0
[ 1986.265824][   T72]      dst_alloc+0x97/0x150
[ 1986.265824][   T72]      ip6_dst_alloc+0x23/0x90
[ 1986.265824][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1986.265824][   T72]      ip6_pol_route+0x56f/0x840
[ 1986.265824][   T72]      fib6_rule_lookup+0x227/0x600
[ 1986.265824][   T72]      ip6_route_output_flags+0x251/0x460
[ 1986.265824][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1986.265824][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1986.265824][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1986.265824][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1986.265824][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1986.265824][   T72]      __sys_connect+0x217/0x2a0
[ 1986.265824][   T72]      __x64_sys_connect+0x72/0xb0
[ 1986.265824][   T72]      do_syscall_64+0xc6/0x1e0
[ 1986.265824][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1986.265824][   T72] 
[ 1996.516695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 1996.517137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1996.517137][   T72]      netdev_get_by_index+0x5e/0x80
[ 1996.517137][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1996.517137][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1996.517137][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1996.517137][   T72]      ipv6_add_addr+0x411/0x2000
[ 1996.517137][   T72]      inet6_addr_add+0x30e/0xa40
[ 1996.517137][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1996.517137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.517137][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.517137][   T72]      netlink_unicast+0x449/0x710
[ 1996.517137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.517137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.517137][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.517137][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.517137][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.517137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.517137][   T72] 
[ 1996.519143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1996.519143][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1996.519143][   T72]      ipv6_find_idev+0x102/0x170
[ 1996.519143][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1996.519143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.519143][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.519143][   T72]      netlink_unicast+0x449/0x710
[ 1996.519143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.519143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.519143][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.519143][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.519143][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.519143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.519143][   T72] 
[ 1996.520667][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 1996.520667][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1996.520667][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1996.520667][   T72]      ipv6_find_idev+0x102/0x170
[ 1996.520667][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1996.520667][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.520667][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.520667][   T72]      netlink_unicast+0x449/0x710
[ 1996.520667][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.520667][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.520667][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.520667][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.520667][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.520667][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.520667][   T72] 
[ 1996.522346][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 1996.522624][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1996.522624][   T72]      netdev_get_by_index+0x5e/0x80
[ 1996.522624][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1996.522624][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1996.522624][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 1996.522624][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 1996.522624][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 1996.522624][   T72]      dev_forward_change+0x2a6/0x7b0
[ 1996.522624][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 1996.522624][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 1996.522624][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 1996.522624][   T72]      vfs_write+0x9e5/0x10a0
[ 1996.522624][   T72]      ksys_write+0xf5/0x1e0
[ 1996.522624][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.522624][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.522624][   T72] 
[ 1996.524444][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1996.524444][   T72]      netdev_get_by_index+0x5e/0x80
[ 1996.524444][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 1996.524444][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 1996.524444][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 1996.524444][   T72]      ipv6_add_addr+0x411/0x2000
[ 1996.524444][   T72]      inet6_addr_add+0x30e/0xa40
[ 1996.524444][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 1996.524444][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.524444][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.524444][   T72]      netlink_unicast+0x449/0x710
[ 1996.524444][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.524444][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.524444][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.524444][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.524444][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.524444][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.524444][   T72] 
[ 1996.526424][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1996.526424][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 1996.526424][   T72]      ipv6_find_idev+0x102/0x170
[ 1996.526424][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1996.526424][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.526424][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.526424][   T72]      netlink_unicast+0x449/0x710
[ 1996.526424][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.526424][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.526424][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.526424][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.526424][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.526424][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.526424][   T72] 
[ 1996.527946][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 1996.527946][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 1996.527946][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 1996.527946][   T72]      ipv6_find_idev+0x102/0x170
[ 1996.527946][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 1996.527946][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 1996.527946][   T72]      netlink_rcv_skb+0x130/0x360
[ 1996.527946][   T72]      netlink_unicast+0x449/0x710
[ 1996.527946][   T72]      netlink_sendmsg+0x723/0xbe0
[ 1996.527946][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 1996.527946][   T72]      ___sys_sendmsg+0xee/0x170
[ 1996.527946][   T72]      __sys_sendmsg+0xcd/0x170
[ 1996.527946][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.527946][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.527946][   T72] 
[ 1996.529613][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1996.529850][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 1996.529850][   T72]      dst_init+0x84/0x4a0
[ 1996.529850][   T72]      dst_alloc+0x97/0x150
[ 1996.529850][   T72]      ip6_dst_alloc+0x23/0x90
[ 1996.529850][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 1996.529850][   T72]      ip6_pol_route+0x56f/0x840
[ 1996.529850][   T72]      fib6_rule_lookup+0x227/0x600
[ 1996.529850][   T72]      ip6_route_output_flags+0x251/0x460
[ 1996.529850][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 1996.529850][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 1996.529850][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 1996.529850][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 1996.529850][   T72]      ip6_datagram_connect+0x2c/0x50
[ 1996.529850][   T72]      __sys_connect+0x217/0x2a0
[ 1996.529850][   T72]      __x64_sys_connect+0x72/0xb0
[ 1996.529850][   T72]      do_syscall_64+0xc6/0x1e0
[ 1996.529850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 1996.529850][   T72] 
[ 2006.772638][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2006.773069][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2006.773069][   T72]      netdev_get_by_index+0x5e/0x80
[ 2006.773069][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2006.773069][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2006.773069][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2006.773069][   T72]      ipv6_add_addr+0x411/0x2000
[ 2006.773069][   T72]      inet6_addr_add+0x30e/0xa40
[ 2006.773069][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2006.773069][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.773069][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.773069][   T72]      netlink_unicast+0x449/0x710
[ 2006.773069][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.773069][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.773069][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.773069][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.773069][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.773069][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.773069][   T72] 
[ 2006.775041][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2006.775041][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2006.775041][   T72]      ipv6_find_idev+0x102/0x170
[ 2006.775041][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2006.775041][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.775041][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.775041][   T72]      netlink_unicast+0x449/0x710
[ 2006.775041][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.775041][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.775041][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.775041][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.775041][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.775041][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.775041][   T72] 
[ 2006.776550][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2006.776550][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2006.776550][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2006.776550][   T72]      ipv6_find_idev+0x102/0x170
[ 2006.776550][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2006.776550][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.776550][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.776550][   T72]      netlink_unicast+0x449/0x710
[ 2006.776550][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.776550][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.776550][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.776550][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.776550][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.776550][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.776550][   T72] 
[ 2006.778203][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2006.778470][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2006.778470][   T72]      netdev_get_by_index+0x5e/0x80
[ 2006.778470][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2006.778470][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2006.778470][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2006.778470][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2006.778470][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2006.778470][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2006.778470][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2006.778470][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2006.778470][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2006.778470][   T72]      vfs_write+0x9e5/0x10a0
[ 2006.778470][   T72]      ksys_write+0xf5/0x1e0
[ 2006.778470][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.778470][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.778470][   T72] 
[ 2006.780316][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2006.780316][   T72]      netdev_get_by_index+0x5e/0x80
[ 2006.780316][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2006.780316][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2006.780316][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2006.780316][   T72]      ipv6_add_addr+0x411/0x2000
[ 2006.780316][   T72]      inet6_addr_add+0x30e/0xa40
[ 2006.780316][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2006.780316][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.780316][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.780316][   T72]      netlink_unicast+0x449/0x710
[ 2006.780316][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.780316][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.780316][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.780316][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.780316][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.780316][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.780316][   T72] 
[ 2006.782286][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2006.782286][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2006.782286][   T72]      ipv6_find_idev+0x102/0x170
[ 2006.782286][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2006.782286][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.782286][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.782286][   T72]      netlink_unicast+0x449/0x710
[ 2006.782286][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.782286][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.782286][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.782286][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.782286][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.782286][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.782286][   T72] 
[ 2006.783805][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2006.783805][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2006.783805][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2006.783805][   T72]      ipv6_find_idev+0x102/0x170
[ 2006.783805][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2006.783805][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2006.783805][   T72]      netlink_rcv_skb+0x130/0x360
[ 2006.783805][   T72]      netlink_unicast+0x449/0x710
[ 2006.783805][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2006.783805][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2006.783805][   T72]      ___sys_sendmsg+0xee/0x170
[ 2006.783805][   T72]      __sys_sendmsg+0xcd/0x170
[ 2006.783805][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.783805][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.783805][   T72] 
[ 2006.785459][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2006.785713][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2006.785713][   T72]      dst_init+0x84/0x4a0
[ 2006.785713][   T72]      dst_alloc+0x97/0x150
[ 2006.785713][   T72]      ip6_dst_alloc+0x23/0x90
[ 2006.785713][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2006.785713][   T72]      ip6_pol_route+0x56f/0x840
[ 2006.785713][   T72]      fib6_rule_lookup+0x227/0x600
[ 2006.785713][   T72]      ip6_route_output_flags+0x251/0x460
[ 2006.785713][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2006.785713][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2006.785713][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2006.785713][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2006.785713][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2006.785713][   T72]      __sys_connect+0x217/0x2a0
[ 2006.785713][   T72]      __x64_sys_connect+0x72/0xb0
[ 2006.785713][   T72]      do_syscall_64+0xc6/0x1e0
[ 2006.785713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2006.785713][   T72] 
[ 2016.836741][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2016.837207][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2016.837207][   T72]      netdev_get_by_index+0x5e/0x80
[ 2016.837207][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2016.837207][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2016.837207][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2016.837207][   T72]      ipv6_add_addr+0x411/0x2000
[ 2016.837207][   T72]      inet6_addr_add+0x30e/0xa40
[ 2016.837207][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2016.837207][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.837207][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.837207][   T72]      netlink_unicast+0x449/0x710
[ 2016.837207][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.837207][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.837207][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.837207][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.837207][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.837207][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.837207][   T72] 
[ 2016.839192][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2016.839192][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2016.839192][   T72]      ipv6_find_idev+0x102/0x170
[ 2016.839192][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2016.839192][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.839192][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.839192][   T72]      netlink_unicast+0x449/0x710
[ 2016.839192][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.839192][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.839192][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.839192][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.839192][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.839192][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.839192][   T72] 
[ 2016.840856][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2016.840856][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2016.840856][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2016.840856][   T72]      ipv6_find_idev+0x102/0x170
[ 2016.840856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2016.840856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.840856][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.840856][   T72]      netlink_unicast+0x449/0x710
[ 2016.840856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.840856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.840856][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.840856][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.840856][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.840856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.840856][   T72] 
[ 2016.842537][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2016.842828][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2016.842828][   T72]      netdev_get_by_index+0x5e/0x80
[ 2016.842828][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2016.842828][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2016.842828][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2016.842828][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2016.842828][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2016.842828][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2016.842828][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2016.842828][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2016.842828][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2016.842828][   T72]      vfs_write+0x9e5/0x10a0
[ 2016.842828][   T72]      ksys_write+0xf5/0x1e0
[ 2016.842828][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.842828][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.842828][   T72] 
[ 2016.844665][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2016.844665][   T72]      netdev_get_by_index+0x5e/0x80
[ 2016.844665][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2016.844665][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2016.844665][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2016.844665][   T72]      ipv6_add_addr+0x411/0x2000
[ 2016.844665][   T72]      inet6_addr_add+0x30e/0xa40
[ 2016.844665][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2016.844665][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.844665][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.844665][   T72]      netlink_unicast+0x449/0x710
[ 2016.844665][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.844665][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.844665][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.844665][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.844665][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.844665][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.844665][   T72] 
[ 2016.846643][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2016.846643][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2016.846643][   T72]      ipv6_find_idev+0x102/0x170
[ 2016.846643][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2016.846643][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.846643][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.846643][   T72]      netlink_unicast+0x449/0x710
[ 2016.846643][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.846643][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.846643][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.846643][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.846643][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.846643][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.846643][   T72] 
[ 2016.848155][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2016.848155][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2016.848155][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2016.848155][   T72]      ipv6_find_idev+0x102/0x170
[ 2016.848155][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2016.848155][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2016.848155][   T72]      netlink_rcv_skb+0x130/0x360
[ 2016.848155][   T72]      netlink_unicast+0x449/0x710
[ 2016.848155][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2016.848155][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2016.848155][   T72]      ___sys_sendmsg+0xee/0x170
[ 2016.848155][   T72]      __sys_sendmsg+0xcd/0x170
[ 2016.848155][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.848155][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.848155][   T72] 
[ 2016.849808][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2016.850044][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2016.850044][   T72]      dst_init+0x84/0x4a0
[ 2016.850044][   T72]      dst_alloc+0x97/0x150
[ 2016.850044][   T72]      ip6_dst_alloc+0x23/0x90
[ 2016.850044][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2016.850044][   T72]      ip6_pol_route+0x56f/0x840
[ 2016.850044][   T72]      fib6_rule_lookup+0x227/0x600
[ 2016.850044][   T72]      ip6_route_output_flags+0x251/0x460
[ 2016.850044][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2016.850044][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2016.850044][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2016.850044][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2016.850044][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2016.850044][   T72]      __sys_connect+0x217/0x2a0
[ 2016.850044][   T72]      __x64_sys_connect+0x72/0xb0
[ 2016.850044][   T72]      do_syscall_64+0xc6/0x1e0
[ 2016.850044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2016.850044][   T72] 
[ 2027.092711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2027.093144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2027.093144][   T72]      netdev_get_by_index+0x5e/0x80
[ 2027.093144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2027.093144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2027.093144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2027.093144][   T72]      ipv6_add_addr+0x411/0x2000
[ 2027.093144][   T72]      inet6_addr_add+0x30e/0xa40
[ 2027.093144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2027.093144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.093144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.093144][   T72]      netlink_unicast+0x449/0x710
[ 2027.093144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.093144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.093144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.093144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.093144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.093144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.093144][   T72] 
[ 2027.095141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2027.095141][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2027.095141][   T72]      ipv6_find_idev+0x102/0x170
[ 2027.095141][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2027.095141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.095141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.095141][   T72]      netlink_unicast+0x449/0x710
[ 2027.095141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.095141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.095141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.095141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.095141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.095141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.095141][   T72] 
[ 2027.096655][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2027.096655][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2027.096655][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2027.096655][   T72]      ipv6_find_idev+0x102/0x170
[ 2027.096655][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2027.096655][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.096655][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.096655][   T72]      netlink_unicast+0x449/0x710
[ 2027.096655][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.096655][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.096655][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.096655][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.096655][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.096655][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.096655][   T72] 
[ 2027.098309][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2027.098582][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2027.098582][   T72]      netdev_get_by_index+0x5e/0x80
[ 2027.098582][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2027.098582][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2027.098582][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2027.098582][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2027.098582][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2027.098582][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2027.098582][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2027.098582][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2027.098582][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2027.098582][   T72]      vfs_write+0x9e5/0x10a0
[ 2027.098582][   T72]      ksys_write+0xf5/0x1e0
[ 2027.098582][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.098582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.098582][   T72] 
[ 2027.100413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2027.100413][   T72]      netdev_get_by_index+0x5e/0x80
[ 2027.100413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2027.100413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2027.100413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2027.100413][   T72]      ipv6_add_addr+0x411/0x2000
[ 2027.100413][   T72]      inet6_addr_add+0x30e/0xa40
[ 2027.100413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2027.100413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.100413][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.100413][   T72]      netlink_unicast+0x449/0x710
[ 2027.100413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.100413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.100413][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.100413][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.100413][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.100413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.100413][   T72] 
[ 2027.102375][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2027.102375][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2027.102375][   T72]      ipv6_find_idev+0x102/0x170
[ 2027.102375][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2027.102375][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.102375][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.102375][   T72]      netlink_unicast+0x449/0x710
[ 2027.102375][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.102375][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.102375][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.102375][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.102375][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.102375][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.102375][   T72] 
[ 2027.103884][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2027.103884][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2027.103884][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2027.103884][   T72]      ipv6_find_idev+0x102/0x170
[ 2027.103884][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2027.103884][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2027.103884][   T72]      netlink_rcv_skb+0x130/0x360
[ 2027.103884][   T72]      netlink_unicast+0x449/0x710
[ 2027.103884][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2027.103884][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2027.103884][   T72]      ___sys_sendmsg+0xee/0x170
[ 2027.103884][   T72]      __sys_sendmsg+0xcd/0x170
[ 2027.103884][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.103884][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.103884][   T72] 
[ 2027.105532][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2027.105773][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2027.105773][   T72]      dst_init+0x84/0x4a0
[ 2027.105773][   T72]      dst_alloc+0x97/0x150
[ 2027.105773][   T72]      ip6_dst_alloc+0x23/0x90
[ 2027.105773][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2027.105773][   T72]      ip6_pol_route+0x56f/0x840
[ 2027.105773][   T72]      fib6_rule_lookup+0x227/0x600
[ 2027.105773][   T72]      ip6_route_output_flags+0x251/0x460
[ 2027.105773][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2027.105773][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2027.105773][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2027.105773][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2027.105773][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2027.105773][   T72]      __sys_connect+0x217/0x2a0
[ 2027.105773][   T72]      __x64_sys_connect+0x72/0xb0
[ 2027.105773][   T72]      do_syscall_64+0xc6/0x1e0
[ 2027.105773][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2027.105773][   T72] 
[ 2037.348699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2037.349085][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2037.349085][   T72]      netdev_get_by_index+0x5e/0x80
[ 2037.349085][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2037.349085][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2037.349085][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2037.349085][   T72]      ipv6_add_addr+0x411/0x2000
[ 2037.349085][   T72]      inet6_addr_add+0x30e/0xa40
[ 2037.349085][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2037.349085][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.349085][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.349085][   T72]      netlink_unicast+0x449/0x710
[ 2037.349085][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.349085][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.349085][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.349085][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.349085][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.349085][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.349085][   T72] 
[ 2037.351066][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2037.351066][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2037.351066][   T72]      ipv6_find_idev+0x102/0x170
[ 2037.351066][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2037.351066][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.351066][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.351066][   T72]      netlink_unicast+0x449/0x710
[ 2037.351066][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.351066][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.351066][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.351066][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.351066][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.351066][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.351066][   T72] 
[ 2037.352578][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2037.352578][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2037.352578][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2037.352578][   T72]      ipv6_find_idev+0x102/0x170
[ 2037.352578][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2037.352578][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.352578][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.352578][   T72]      netlink_unicast+0x449/0x710
[ 2037.352578][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.352578][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.352578][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.352578][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.352578][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.352578][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.352578][   T72] 
[ 2037.354262][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2037.354525][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2037.354525][   T72]      netdev_get_by_index+0x5e/0x80
[ 2037.354525][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2037.354525][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2037.354525][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2037.354525][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2037.354525][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2037.354525][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2037.354525][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2037.354525][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2037.354525][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2037.354525][   T72]      vfs_write+0x9e5/0x10a0
[ 2037.354525][   T72]      ksys_write+0xf5/0x1e0
[ 2037.354525][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.354525][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.354525][   T72] 
[ 2037.356337][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2037.356337][   T72]      netdev_get_by_index+0x5e/0x80
[ 2037.356337][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2037.356337][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2037.356337][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2037.356337][   T72]      ipv6_add_addr+0x411/0x2000
[ 2037.356337][   T72]      inet6_addr_add+0x30e/0xa40
[ 2037.356337][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2037.356337][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.356337][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.356337][   T72]      netlink_unicast+0x449/0x710
[ 2037.356337][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.356337][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.356337][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.356337][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.356337][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.356337][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.356337][   T72] 
[ 2037.358294][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2037.358294][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2037.358294][   T72]      ipv6_find_idev+0x102/0x170
[ 2037.358294][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2037.358294][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.358294][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.358294][   T72]      netlink_unicast+0x449/0x710
[ 2037.358294][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.358294][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.358294][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.358294][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.358294][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.358294][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.358294][   T72] 
[ 2037.359811][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2037.359811][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2037.359811][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2037.359811][   T72]      ipv6_find_idev+0x102/0x170
[ 2037.359811][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2037.359811][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2037.359811][   T72]      netlink_rcv_skb+0x130/0x360
[ 2037.359811][   T72]      netlink_unicast+0x449/0x710
[ 2037.359811][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2037.359811][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2037.359811][   T72]      ___sys_sendmsg+0xee/0x170
[ 2037.359811][   T72]      __sys_sendmsg+0xcd/0x170
[ 2037.359811][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.359811][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.359811][   T72] 
[ 2037.361457][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2037.361704][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2037.361704][   T72]      dst_init+0x84/0x4a0
[ 2037.361704][   T72]      dst_alloc+0x97/0x150
[ 2037.361704][   T72]      ip6_dst_alloc+0x23/0x90
[ 2037.361704][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2037.361704][   T72]      ip6_pol_route+0x56f/0x840
[ 2037.361704][   T72]      fib6_rule_lookup+0x227/0x600
[ 2037.361704][   T72]      ip6_route_output_flags+0x251/0x460
[ 2037.361704][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2037.361704][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2037.361704][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2037.361704][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2037.361704][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2037.361704][   T72]      __sys_connect+0x217/0x2a0
[ 2037.361704][   T72]      __x64_sys_connect+0x72/0xb0
[ 2037.361704][   T72]      do_syscall_64+0xc6/0x1e0
[ 2037.361704][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2037.361704][   T72] 
[ 2047.572697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2047.573143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2047.573143][   T72]      netdev_get_by_index+0x5e/0x80
[ 2047.573143][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2047.573143][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2047.573143][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2047.573143][   T72]      ipv6_add_addr+0x411/0x2000
[ 2047.573143][   T72]      inet6_addr_add+0x30e/0xa40
[ 2047.573143][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2047.573143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.573143][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.573143][   T72]      netlink_unicast+0x449/0x710
[ 2047.573143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.573143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.573143][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.573143][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.573143][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.573143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.573143][   T72] 
[ 2047.575113][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2047.575113][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2047.575113][   T72]      ipv6_find_idev+0x102/0x170
[ 2047.575113][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2047.575113][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.575113][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.575113][   T72]      netlink_unicast+0x449/0x710
[ 2047.575113][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.575113][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.575113][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.575113][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.575113][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.575113][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.575113][   T72] 
[ 2047.576625][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2047.576625][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2047.576625][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2047.576625][   T72]      ipv6_find_idev+0x102/0x170
[ 2047.576625][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2047.576625][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.576625][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.576625][   T72]      netlink_unicast+0x449/0x710
[ 2047.576625][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.576625][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.576625][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.576625][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.576625][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.576625][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.576625][   T72] 
[ 2047.578279][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2047.578539][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2047.578539][   T72]      netdev_get_by_index+0x5e/0x80
[ 2047.578539][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2047.578539][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2047.578539][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2047.578539][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2047.578539][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2047.578539][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2047.578539][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2047.578539][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2047.578539][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2047.578539][   T72]      vfs_write+0x9e5/0x10a0
[ 2047.578539][   T72]      ksys_write+0xf5/0x1e0
[ 2047.578539][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.578539][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.578539][   T72] 
[ 2047.580354][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2047.580354][   T72]      netdev_get_by_index+0x5e/0x80
[ 2047.580354][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2047.580354][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2047.580354][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2047.580354][   T72]      ipv6_add_addr+0x411/0x2000
[ 2047.580354][   T72]      inet6_addr_add+0x30e/0xa40
[ 2047.580354][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2047.580354][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.580354][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.580354][   T72]      netlink_unicast+0x449/0x710
[ 2047.580354][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.580354][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.580354][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.580354][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.580354][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.580354][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.580354][   T72] 
[ 2047.582318][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2047.582318][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2047.582318][   T72]      ipv6_find_idev+0x102/0x170
[ 2047.582318][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2047.582318][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.582318][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.582318][   T72]      netlink_unicast+0x449/0x710
[ 2047.582318][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.582318][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.582318][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.582318][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.582318][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.582318][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.582318][   T72] 
[ 2047.583825][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2047.583825][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2047.583825][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2047.583825][   T72]      ipv6_find_idev+0x102/0x170
[ 2047.583825][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2047.583825][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2047.583825][   T72]      netlink_rcv_skb+0x130/0x360
[ 2047.583825][   T72]      netlink_unicast+0x449/0x710
[ 2047.583825][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2047.583825][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2047.583825][   T72]      ___sys_sendmsg+0xee/0x170
[ 2047.583825][   T72]      __sys_sendmsg+0xcd/0x170
[ 2047.583825][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.583825][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.583825][   T72] 
[ 2047.585464][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2047.585706][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2047.585706][   T72]      dst_init+0x84/0x4a0
[ 2047.585706][   T72]      dst_alloc+0x97/0x150
[ 2047.585706][   T72]      ip6_dst_alloc+0x23/0x90
[ 2047.585706][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2047.585706][   T72]      ip6_pol_route+0x56f/0x840
[ 2047.585706][   T72]      fib6_rule_lookup+0x227/0x600
[ 2047.585706][   T72]      ip6_route_output_flags+0x251/0x460
[ 2047.585706][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2047.585706][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2047.585706][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2047.585706][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2047.585706][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2047.585706][   T72]      __sys_connect+0x217/0x2a0
[ 2047.585706][   T72]      __x64_sys_connect+0x72/0xb0
[ 2047.585706][   T72]      do_syscall_64+0xc6/0x1e0
[ 2047.585706][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2047.585706][   T72] 
[ 2057.756704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2057.757144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2057.757144][   T72]      netdev_get_by_index+0x5e/0x80
[ 2057.757144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2057.757144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2057.757144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2057.757144][   T72]      ipv6_add_addr+0x411/0x2000
[ 2057.757144][   T72]      inet6_addr_add+0x30e/0xa40
[ 2057.757144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2057.757144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.757144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.757144][   T72]      netlink_unicast+0x449/0x710
[ 2057.757144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.757144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.757144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.757144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.757144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.757144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.757144][   T72] 
[ 2057.759130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2057.759130][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2057.759130][   T72]      ipv6_find_idev+0x102/0x170
[ 2057.759130][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2057.759130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.759130][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.759130][   T72]      netlink_unicast+0x449/0x710
[ 2057.759130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.759130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.759130][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.759130][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.759130][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.759130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.759130][   T72] 
[ 2057.762582][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2057.762582][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2057.762582][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2057.762582][   T72]      ipv6_find_idev+0x102/0x170
[ 2057.762582][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2057.762582][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.762582][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.762582][   T72]      netlink_unicast+0x449/0x710
[ 2057.762582][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.762582][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.762582][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.762582][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.762582][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.762582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.762582][   T72] 
[ 2057.764257][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2057.764526][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2057.764526][   T72]      netdev_get_by_index+0x5e/0x80
[ 2057.764526][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2057.764526][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2057.764526][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2057.764526][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2057.764526][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2057.764526][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2057.764526][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2057.764526][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2057.764526][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2057.764526][   T72]      vfs_write+0x9e5/0x10a0
[ 2057.764526][   T72]      ksys_write+0xf5/0x1e0
[ 2057.764526][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.764526][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.764526][   T72] 
[ 2057.766356][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2057.766356][   T72]      netdev_get_by_index+0x5e/0x80
[ 2057.766356][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2057.766356][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2057.766356][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2057.766356][   T72]      ipv6_add_addr+0x411/0x2000
[ 2057.766356][   T72]      inet6_addr_add+0x30e/0xa40
[ 2057.766356][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2057.766356][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.766356][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.766356][   T72]      netlink_unicast+0x449/0x710
[ 2057.766356][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.766356][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.766356][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.766356][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.766356][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.766356][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.766356][   T72] 
[ 2057.768324][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2057.768324][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2057.768324][   T72]      ipv6_find_idev+0x102/0x170
[ 2057.768324][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2057.768324][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.768324][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.768324][   T72]      netlink_unicast+0x449/0x710
[ 2057.768324][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.768324][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.768324][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.768324][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.768324][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.768324][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.768324][   T72] 
[ 2057.769840][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2057.769840][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2057.769840][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2057.769840][   T72]      ipv6_find_idev+0x102/0x170
[ 2057.769840][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2057.769840][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2057.769840][   T72]      netlink_rcv_skb+0x130/0x360
[ 2057.769840][   T72]      netlink_unicast+0x449/0x710
[ 2057.769840][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2057.769840][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2057.769840][   T72]      ___sys_sendmsg+0xee/0x170
[ 2057.769840][   T72]      __sys_sendmsg+0xcd/0x170
[ 2057.769840][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.769840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.769840][   T72] 
[ 2057.771494][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2057.771747][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2057.771747][   T72]      dst_init+0x84/0x4a0
[ 2057.771747][   T72]      dst_alloc+0x97/0x150
[ 2057.771747][   T72]      ip6_dst_alloc+0x23/0x90
[ 2057.771747][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2057.771747][   T72]      ip6_pol_route+0x56f/0x840
[ 2057.771747][   T72]      fib6_rule_lookup+0x227/0x600
[ 2057.771747][   T72]      ip6_route_output_flags+0x251/0x460
[ 2057.771747][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2057.771747][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2057.771747][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2057.771747][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2057.771747][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2057.771747][   T72]      __sys_connect+0x217/0x2a0
[ 2057.771747][   T72]      __x64_sys_connect+0x72/0xb0
[ 2057.771747][   T72]      do_syscall_64+0xc6/0x1e0
[ 2057.771747][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2057.771747][   T72] 
[ 2067.860705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2067.861180][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2067.861180][   T72]      netdev_get_by_index+0x5e/0x80
[ 2067.861180][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2067.861180][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2067.861180][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2067.861180][   T72]      ipv6_add_addr+0x411/0x2000
[ 2067.861180][   T72]      inet6_addr_add+0x30e/0xa40
[ 2067.861180][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2067.861180][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.861180][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.861180][   T72]      netlink_unicast+0x449/0x710
[ 2067.861180][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.861180][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.861180][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.861180][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.861180][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.861180][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.861180][   T72] 
[ 2067.863172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2067.863172][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2067.863172][   T72]      ipv6_find_idev+0x102/0x170
[ 2067.863172][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2067.863172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.863172][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.863172][   T72]      netlink_unicast+0x449/0x710
[ 2067.863172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.863172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.863172][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.863172][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.863172][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.863172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.863172][   T72] 
[ 2067.864697][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2067.864697][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2067.864697][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2067.864697][   T72]      ipv6_find_idev+0x102/0x170
[ 2067.864697][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2067.864697][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.864697][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.864697][   T72]      netlink_unicast+0x449/0x710
[ 2067.864697][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.864697][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.864697][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.864697][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.864697][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.864697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.864697][   T72] 
[ 2067.866366][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2067.866661][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2067.866661][   T72]      netdev_get_by_index+0x5e/0x80
[ 2067.866661][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2067.866661][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2067.866661][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2067.866661][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2067.866661][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2067.866661][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2067.866661][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2067.866661][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2067.866661][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2067.866661][   T72]      vfs_write+0x9e5/0x10a0
[ 2067.866661][   T72]      ksys_write+0xf5/0x1e0
[ 2067.866661][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.866661][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.866661][   T72] 
[ 2067.868482][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2067.868482][   T72]      netdev_get_by_index+0x5e/0x80
[ 2067.868482][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2067.868482][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2067.868482][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2067.868482][   T72]      ipv6_add_addr+0x411/0x2000
[ 2067.868482][   T72]      inet6_addr_add+0x30e/0xa40
[ 2067.868482][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2067.868482][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.868482][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.868482][   T72]      netlink_unicast+0x449/0x710
[ 2067.868482][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.868482][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.868482][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.868482][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.868482][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.868482][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.868482][   T72] 
[ 2067.870467][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2067.870467][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2067.870467][   T72]      ipv6_find_idev+0x102/0x170
[ 2067.870467][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2067.870467][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.870467][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.870467][   T72]      netlink_unicast+0x449/0x710
[ 2067.870467][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.870467][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.870467][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.870467][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.870467][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.870467][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.870467][   T72] 
[ 2067.871989][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2067.871989][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2067.871989][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2067.871989][   T72]      ipv6_find_idev+0x102/0x170
[ 2067.871989][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2067.871989][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2067.871989][   T72]      netlink_rcv_skb+0x130/0x360
[ 2067.871989][   T72]      netlink_unicast+0x449/0x710
[ 2067.871989][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2067.871989][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2067.871989][   T72]      ___sys_sendmsg+0xee/0x170
[ 2067.871989][   T72]      __sys_sendmsg+0xcd/0x170
[ 2067.871989][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.871989][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.871989][   T72] 
[ 2067.873676][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2067.873912][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2067.873912][   T72]      dst_init+0x84/0x4a0
[ 2067.873912][   T72]      dst_alloc+0x97/0x150
[ 2067.873912][   T72]      ip6_dst_alloc+0x23/0x90
[ 2067.873912][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2067.873912][   T72]      ip6_pol_route+0x56f/0x840
[ 2067.873912][   T72]      fib6_rule_lookup+0x227/0x600
[ 2067.873912][   T72]      ip6_route_output_flags+0x251/0x460
[ 2067.873912][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2067.873912][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2067.873912][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2067.873912][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2067.873912][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2067.873912][   T72]      __sys_connect+0x217/0x2a0
[ 2067.873912][   T72]      __x64_sys_connect+0x72/0xb0
[ 2067.873912][   T72]      do_syscall_64+0xc6/0x1e0
[ 2067.873912][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2067.873912][   T72] 
[ 2078.116727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2078.117157][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2078.117157][   T72]      netdev_get_by_index+0x5e/0x80
[ 2078.117157][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2078.117157][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2078.117157][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2078.117157][   T72]      ipv6_add_addr+0x411/0x2000
[ 2078.117157][   T72]      inet6_addr_add+0x30e/0xa40
[ 2078.117157][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2078.117157][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.117157][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.117157][   T72]      netlink_unicast+0x449/0x710
[ 2078.117157][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.117157][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.117157][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.117157][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.117157][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.117157][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.117157][   T72] 
[ 2078.119172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2078.119172][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2078.119172][   T72]      ipv6_find_idev+0x102/0x170
[ 2078.119172][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2078.119172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.119172][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.119172][   T72]      netlink_unicast+0x449/0x710
[ 2078.119172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.119172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.119172][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.119172][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.119172][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.119172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.119172][   T72] 
[ 2078.120708][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2078.120708][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2078.120708][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2078.120708][   T72]      ipv6_find_idev+0x102/0x170
[ 2078.120708][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2078.120708][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.120708][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.120708][   T72]      netlink_unicast+0x449/0x710
[ 2078.120708][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.120708][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.120708][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.120708][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.120708][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.120708][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.120708][   T72] 
[ 2078.122377][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2078.122655][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2078.122655][   T72]      netdev_get_by_index+0x5e/0x80
[ 2078.122655][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2078.122655][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2078.122655][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2078.122655][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2078.122655][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2078.122655][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2078.122655][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2078.122655][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2078.122655][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2078.122655][   T72]      vfs_write+0x9e5/0x10a0
[ 2078.122655][   T72]      ksys_write+0xf5/0x1e0
[ 2078.122655][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.122655][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.122655][   T72] 
[ 2078.124494][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2078.124494][   T72]      netdev_get_by_index+0x5e/0x80
[ 2078.124494][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2078.124494][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2078.124494][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2078.124494][   T72]      ipv6_add_addr+0x411/0x2000
[ 2078.124494][   T72]      inet6_addr_add+0x30e/0xa40
[ 2078.124494][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2078.124494][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.124494][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.124494][   T72]      netlink_unicast+0x449/0x710
[ 2078.124494][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.124494][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.124494][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.124494][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.124494][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.124494][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.124494][   T72] 
[ 2078.126457][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2078.126457][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2078.126457][   T72]      ipv6_find_idev+0x102/0x170
[ 2078.126457][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2078.126457][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.126457][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.126457][   T72]      netlink_unicast+0x449/0x710
[ 2078.126457][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.126457][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.126457][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.126457][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.126457][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.126457][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.126457][   T72] 
[ 2078.127994][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2078.127994][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2078.127994][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2078.127994][   T72]      ipv6_find_idev+0x102/0x170
[ 2078.127994][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2078.127994][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2078.127994][   T72]      netlink_rcv_skb+0x130/0x360
[ 2078.127994][   T72]      netlink_unicast+0x449/0x710
[ 2078.127994][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2078.127994][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2078.127994][   T72]      ___sys_sendmsg+0xee/0x170
[ 2078.127994][   T72]      __sys_sendmsg+0xcd/0x170
[ 2078.127994][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.127994][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.127994][   T72] 
[ 2078.129657][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2078.129889][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2078.129889][   T72]      dst_init+0x84/0x4a0
[ 2078.129889][   T72]      dst_alloc+0x97/0x150
[ 2078.129889][   T72]      ip6_dst_alloc+0x23/0x90
[ 2078.129889][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2078.129889][   T72]      ip6_pol_route+0x56f/0x840
[ 2078.129889][   T72]      fib6_rule_lookup+0x227/0x600
[ 2078.129889][   T72]      ip6_route_output_flags+0x251/0x460
[ 2078.129889][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2078.129889][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2078.129889][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2078.129889][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2078.129889][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2078.129889][   T72]      __sys_connect+0x217/0x2a0
[ 2078.129889][   T72]      __x64_sys_connect+0x72/0xb0
[ 2078.129889][   T72]      do_syscall_64+0xc6/0x1e0
[ 2078.129889][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2078.129889][   T72] 
[ 2088.372744][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2088.373225][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2088.373225][   T72]      netdev_get_by_index+0x5e/0x80
[ 2088.373225][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2088.373225][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2088.373225][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2088.373225][   T72]      ipv6_add_addr+0x411/0x2000
[ 2088.373225][   T72]      inet6_addr_add+0x30e/0xa40
[ 2088.373225][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2088.373225][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.373225][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.373225][   T72]      netlink_unicast+0x449/0x710
[ 2088.373225][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.373225][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.373225][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.373225][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.373225][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.373225][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.373225][   T72] 
[ 2088.375191][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2088.375191][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2088.375191][   T72]      ipv6_find_idev+0x102/0x170
[ 2088.375191][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2088.375191][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.375191][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.375191][   T72]      netlink_unicast+0x449/0x710
[ 2088.375191][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.375191][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.375191][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.375191][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.375191][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.375191][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.375191][   T72] 
[ 2088.376717][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2088.376717][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2088.376717][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2088.376717][   T72]      ipv6_find_idev+0x102/0x170
[ 2088.376717][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2088.376717][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.376717][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.376717][   T72]      netlink_unicast+0x449/0x710
[ 2088.376717][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.376717][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.376717][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.376717][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.376717][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.376717][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.376717][   T72] 
[ 2088.378379][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2088.378662][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2088.378662][   T72]      netdev_get_by_index+0x5e/0x80
[ 2088.378662][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2088.378662][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2088.378662][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2088.378662][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2088.378662][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2088.378662][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2088.378662][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2088.378662][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2088.378662][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2088.378662][   T72]      vfs_write+0x9e5/0x10a0
[ 2088.378662][   T72]      ksys_write+0xf5/0x1e0
[ 2088.378662][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.378662][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.378662][   T72] 
[ 2088.380482][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2088.380482][   T72]      netdev_get_by_index+0x5e/0x80
[ 2088.380482][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2088.380482][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2088.380482][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2088.380482][   T72]      ipv6_add_addr+0x411/0x2000
[ 2088.380482][   T72]      inet6_addr_add+0x30e/0xa40
[ 2088.380482][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2088.380482][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.380482][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.380482][   T72]      netlink_unicast+0x449/0x710
[ 2088.380482][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.380482][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.380482][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.380482][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.380482][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.380482][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.380482][   T72] 
[ 2088.382430][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2088.382430][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2088.382430][   T72]      ipv6_find_idev+0x102/0x170
[ 2088.382430][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2088.382430][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.382430][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.382430][   T72]      netlink_unicast+0x449/0x710
[ 2088.382430][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.382430][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.382430][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.382430][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.382430][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.382430][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.382430][   T72] 
[ 2088.383940][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2088.383940][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2088.383940][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2088.383940][   T72]      ipv6_find_idev+0x102/0x170
[ 2088.383940][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2088.383940][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2088.383940][   T72]      netlink_rcv_skb+0x130/0x360
[ 2088.383940][   T72]      netlink_unicast+0x449/0x710
[ 2088.383940][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2088.383940][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2088.383940][   T72]      ___sys_sendmsg+0xee/0x170
[ 2088.383940][   T72]      __sys_sendmsg+0xcd/0x170
[ 2088.383940][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.383940][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.383940][   T72] 
[ 2088.385583][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2088.385836][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2088.385836][   T72]      dst_init+0x84/0x4a0
[ 2088.385836][   T72]      dst_alloc+0x97/0x150
[ 2088.385836][   T72]      ip6_dst_alloc+0x23/0x90
[ 2088.385836][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2088.385836][   T72]      ip6_pol_route+0x56f/0x840
[ 2088.385836][   T72]      fib6_rule_lookup+0x227/0x600
[ 2088.385836][   T72]      ip6_route_output_flags+0x251/0x460
[ 2088.385836][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2088.385836][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2088.385836][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2088.385836][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2088.385836][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2088.385836][   T72]      __sys_connect+0x217/0x2a0
[ 2088.385836][   T72]      __x64_sys_connect+0x72/0xb0
[ 2088.385836][   T72]      do_syscall_64+0xc6/0x1e0
[ 2088.385836][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2088.385836][   T72] 
[ 2098.468696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2098.469123][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2098.469123][   T72]      netdev_get_by_index+0x5e/0x80
[ 2098.469123][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2098.469123][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2098.469123][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2098.469123][   T72]      ipv6_add_addr+0x411/0x2000
[ 2098.469123][   T72]      inet6_addr_add+0x30e/0xa40
[ 2098.469123][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2098.469123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.469123][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.469123][   T72]      netlink_unicast+0x449/0x710
[ 2098.469123][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.469123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.469123][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.469123][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.469123][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.469123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.469123][   T72] 
[ 2098.471099][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2098.471099][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2098.471099][   T72]      ipv6_find_idev+0x102/0x170
[ 2098.471099][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2098.471099][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.471099][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.471099][   T72]      netlink_unicast+0x449/0x710
[ 2098.471099][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.471099][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.471099][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.471099][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.471099][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.471099][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.471099][   T72] 
[ 2098.472609][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2098.472609][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2098.472609][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2098.472609][   T72]      ipv6_find_idev+0x102/0x170
[ 2098.472609][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2098.472609][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.472609][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.472609][   T72]      netlink_unicast+0x449/0x710
[ 2098.472609][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.472609][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.472609][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.472609][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.472609][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.472609][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.472609][   T72] 
[ 2098.474272][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2098.474537][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2098.474537][   T72]      netdev_get_by_index+0x5e/0x80
[ 2098.474537][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2098.474537][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2098.474537][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2098.474537][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2098.474537][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2098.474537][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2098.474537][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2098.474537][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2098.474537][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2098.474537][   T72]      vfs_write+0x9e5/0x10a0
[ 2098.474537][   T72]      ksys_write+0xf5/0x1e0
[ 2098.474537][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.474537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.474537][   T72] 
[ 2098.476346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2098.476346][   T72]      netdev_get_by_index+0x5e/0x80
[ 2098.476346][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2098.476346][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2098.476346][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2098.476346][   T72]      ipv6_add_addr+0x411/0x2000
[ 2098.476346][   T72]      inet6_addr_add+0x30e/0xa40
[ 2098.476346][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2098.476346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.476346][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.476346][   T72]      netlink_unicast+0x449/0x710
[ 2098.476346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.476346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.476346][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.476346][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.476346][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.476346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.476346][   T72] 
[ 2098.478299][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2098.478299][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2098.478299][   T72]      ipv6_find_idev+0x102/0x170
[ 2098.478299][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2098.478299][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.478299][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.478299][   T72]      netlink_unicast+0x449/0x710
[ 2098.478299][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.478299][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.478299][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.478299][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.478299][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.478299][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.478299][   T72] 
[ 2098.479803][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2098.479803][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2098.479803][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2098.479803][   T72]      ipv6_find_idev+0x102/0x170
[ 2098.479803][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2098.479803][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2098.479803][   T72]      netlink_rcv_skb+0x130/0x360
[ 2098.479803][   T72]      netlink_unicast+0x449/0x710
[ 2098.479803][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2098.479803][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2098.479803][   T72]      ___sys_sendmsg+0xee/0x170
[ 2098.479803][   T72]      __sys_sendmsg+0xcd/0x170
[ 2098.479803][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.479803][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.479803][   T72] 
[ 2098.481450][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2098.481694][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2098.481694][   T72]      dst_init+0x84/0x4a0
[ 2098.481694][   T72]      dst_alloc+0x97/0x150
[ 2098.481694][   T72]      ip6_dst_alloc+0x23/0x90
[ 2098.481694][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2098.481694][   T72]      ip6_pol_route+0x56f/0x840
[ 2098.481694][   T72]      fib6_rule_lookup+0x227/0x600
[ 2098.481694][   T72]      ip6_route_output_flags+0x251/0x460
[ 2098.481694][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2098.481694][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2098.481694][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2098.481694][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2098.481694][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2098.481694][   T72]      __sys_connect+0x217/0x2a0
[ 2098.481694][   T72]      __x64_sys_connect+0x72/0xb0
[ 2098.481694][   T72]      do_syscall_64+0xc6/0x1e0
[ 2098.481694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2098.481694][   T72] 
[ 2108.724701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2108.725127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2108.725127][   T72]      netdev_get_by_index+0x5e/0x80
[ 2108.725127][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2108.725127][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2108.725127][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2108.725127][   T72]      ipv6_add_addr+0x411/0x2000
[ 2108.725127][   T72]      inet6_addr_add+0x30e/0xa40
[ 2108.725127][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2108.725127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.725127][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.725127][   T72]      netlink_unicast+0x449/0x710
[ 2108.725127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.725127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.725127][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.725127][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.725127][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.725127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.725127][   T72] 
[ 2108.727104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2108.727104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2108.727104][   T72]      ipv6_find_idev+0x102/0x170
[ 2108.727104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2108.727104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.727104][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.727104][   T72]      netlink_unicast+0x449/0x710
[ 2108.727104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.727104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.727104][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.727104][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.727104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.727104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.727104][   T72] 
[ 2108.728613][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2108.728613][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2108.728613][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2108.728613][   T72]      ipv6_find_idev+0x102/0x170
[ 2108.728613][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2108.728613][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.728613][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.728613][   T72]      netlink_unicast+0x449/0x710
[ 2108.728613][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.728613][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.728613][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.728613][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.728613][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.728613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.728613][   T72] 
[ 2108.730278][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2108.730541][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2108.730541][   T72]      netdev_get_by_index+0x5e/0x80
[ 2108.730541][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2108.730541][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2108.730541][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2108.730541][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2108.730541][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2108.730541][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2108.730541][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2108.730541][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2108.730541][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2108.730541][   T72]      vfs_write+0x9e5/0x10a0
[ 2108.730541][   T72]      ksys_write+0xf5/0x1e0
[ 2108.730541][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.730541][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.730541][   T72] 
[ 2108.732352][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2108.732352][   T72]      netdev_get_by_index+0x5e/0x80
[ 2108.732352][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2108.732352][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2108.732352][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2108.732352][   T72]      ipv6_add_addr+0x411/0x2000
[ 2108.732352][   T72]      inet6_addr_add+0x30e/0xa40
[ 2108.732352][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2108.732352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.732352][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.732352][   T72]      netlink_unicast+0x449/0x710
[ 2108.732352][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.732352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.732352][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.732352][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.732352][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.732352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.732352][   T72] 
[ 2108.734305][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2108.734305][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2108.734305][   T72]      ipv6_find_idev+0x102/0x170
[ 2108.734305][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2108.734305][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.734305][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.734305][   T72]      netlink_unicast+0x449/0x710
[ 2108.734305][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.734305][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.734305][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.734305][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.734305][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.734305][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.734305][   T72] 
[ 2108.735810][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2108.735810][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2108.735810][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2108.735810][   T72]      ipv6_find_idev+0x102/0x170
[ 2108.735810][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2108.735810][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2108.735810][   T72]      netlink_rcv_skb+0x130/0x360
[ 2108.735810][   T72]      netlink_unicast+0x449/0x710
[ 2108.735810][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2108.735810][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2108.735810][   T72]      ___sys_sendmsg+0xee/0x170
[ 2108.735810][   T72]      __sys_sendmsg+0xcd/0x170
[ 2108.735810][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.735810][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.735810][   T72] 
[ 2108.737451][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2108.737941][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2108.737941][   T72]      dst_init+0x84/0x4a0
[ 2108.737941][   T72]      dst_alloc+0x97/0x150
[ 2108.737941][   T72]      ip6_dst_alloc+0x23/0x90
[ 2108.737941][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2108.737941][   T72]      ip6_pol_route+0x56f/0x840
[ 2108.737941][   T72]      fib6_rule_lookup+0x227/0x600
[ 2108.737941][   T72]      ip6_route_output_flags+0x251/0x460
[ 2108.737941][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2108.737941][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2108.737941][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2108.737941][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2108.737941][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2108.737941][   T72]      __sys_connect+0x217/0x2a0
[ 2108.737941][   T72]      __x64_sys_connect+0x72/0xb0
[ 2108.737941][   T72]      do_syscall_64+0xc6/0x1e0
[ 2108.737941][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2108.737941][   T72] 
[ 2118.884705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2118.885136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2118.885136][   T72]      netdev_get_by_index+0x5e/0x80
[ 2118.885136][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2118.885136][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2118.885136][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2118.885136][   T72]      ipv6_add_addr+0x411/0x2000
[ 2118.885136][   T72]      inet6_addr_add+0x30e/0xa40
[ 2118.885136][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2118.885136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.885136][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.885136][   T72]      netlink_unicast+0x449/0x710
[ 2118.885136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.885136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.885136][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.885136][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.885136][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.885136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.885136][   T72] 
[ 2118.887104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2118.887104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2118.887104][   T72]      ipv6_find_idev+0x102/0x170
[ 2118.887104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2118.887104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.887104][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.887104][   T72]      netlink_unicast+0x449/0x710
[ 2118.887104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.887104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.887104][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.887104][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.887104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.887104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.887104][   T72] 
[ 2118.888635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2118.888635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2118.888635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2118.888635][   T72]      ipv6_find_idev+0x102/0x170
[ 2118.888635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2118.888635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.888635][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.888635][   T72]      netlink_unicast+0x449/0x710
[ 2118.888635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.888635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.888635][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.888635][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.888635][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.888635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.888635][   T72] 
[ 2118.890298][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2118.890576][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2118.890576][   T72]      netdev_get_by_index+0x5e/0x80
[ 2118.890576][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2118.890576][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2118.890576][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2118.890576][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2118.890576][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2118.890576][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2118.890576][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2118.890576][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2118.890576][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2118.890576][   T72]      vfs_write+0x9e5/0x10a0
[ 2118.890576][   T72]      ksys_write+0xf5/0x1e0
[ 2118.890576][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.890576][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.890576][   T72] 
[ 2118.892383][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2118.892383][   T72]      netdev_get_by_index+0x5e/0x80
[ 2118.892383][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2118.892383][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2118.892383][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2118.892383][   T72]      ipv6_add_addr+0x411/0x2000
[ 2118.892383][   T72]      inet6_addr_add+0x30e/0xa40
[ 2118.892383][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2118.892383][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.892383][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.892383][   T72]      netlink_unicast+0x449/0x710
[ 2118.892383][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.892383][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.892383][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.892383][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.892383][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.892383][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.892383][   T72] 
[ 2118.894364][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2118.894364][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2118.894364][   T72]      ipv6_find_idev+0x102/0x170
[ 2118.894364][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2118.894364][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.894364][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.894364][   T72]      netlink_unicast+0x449/0x710
[ 2118.894364][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.894364][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.894364][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.894364][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.894364][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.894364][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.894364][   T72] 
[ 2118.895867][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2118.895867][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2118.895867][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2118.895867][   T72]      ipv6_find_idev+0x102/0x170
[ 2118.895867][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2118.895867][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2118.895867][   T72]      netlink_rcv_skb+0x130/0x360
[ 2118.895867][   T72]      netlink_unicast+0x449/0x710
[ 2118.895867][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2118.895867][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2118.895867][   T72]      ___sys_sendmsg+0xee/0x170
[ 2118.895867][   T72]      __sys_sendmsg+0xcd/0x170
[ 2118.895867][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.895867][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.895867][   T72] 
[ 2118.897515][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2118.897768][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2118.897768][   T72]      dst_init+0x84/0x4a0
[ 2118.897768][   T72]      dst_alloc+0x97/0x150
[ 2118.897768][   T72]      ip6_dst_alloc+0x23/0x90
[ 2118.897768][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2118.897768][   T72]      ip6_pol_route+0x56f/0x840
[ 2118.897768][   T72]      fib6_rule_lookup+0x227/0x600
[ 2118.897768][   T72]      ip6_route_output_flags+0x251/0x460
[ 2118.897768][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2118.897768][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2118.897768][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2118.897768][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2118.897768][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2118.897768][   T72]      __sys_connect+0x217/0x2a0
[ 2118.897768][   T72]      __x64_sys_connect+0x72/0xb0
[ 2118.897768][   T72]      do_syscall_64+0xc6/0x1e0
[ 2118.897768][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2118.897768][   T72] 
[ 2129.148706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2129.149135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2129.149135][   T72]      netdev_get_by_index+0x5e/0x80
[ 2129.149135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2129.149135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2129.149135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2129.149135][   T72]      ipv6_add_addr+0x411/0x2000
[ 2129.149135][   T72]      inet6_addr_add+0x30e/0xa40
[ 2129.149135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2129.149135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.149135][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.149135][   T72]      netlink_unicast+0x449/0x710
[ 2129.149135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.149135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.149135][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.149135][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.149135][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.149135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.149135][   T72] 
[ 2129.151126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2129.151126][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2129.151126][   T72]      ipv6_find_idev+0x102/0x170
[ 2129.151126][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2129.151126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.151126][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.151126][   T72]      netlink_unicast+0x449/0x710
[ 2129.151126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.151126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.151126][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.151126][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.151126][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.151126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.151126][   T72] 
[ 2129.152634][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2129.152634][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2129.152634][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2129.152634][   T72]      ipv6_find_idev+0x102/0x170
[ 2129.152634][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2129.152634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.152634][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.152634][   T72]      netlink_unicast+0x449/0x710
[ 2129.152634][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.152634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.152634][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.152634][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.152634][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.152634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.152634][   T72] 
[ 2129.154290][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2129.154552][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2129.154552][   T72]      netdev_get_by_index+0x5e/0x80
[ 2129.154552][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2129.154552][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2129.154552][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2129.154552][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2129.154552][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2129.154552][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2129.154552][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2129.154552][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2129.154552][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2129.154552][   T72]      vfs_write+0x9e5/0x10a0
[ 2129.154552][   T72]      ksys_write+0xf5/0x1e0
[ 2129.154552][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.154552][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.154552][   T72] 
[ 2129.156376][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2129.156376][   T72]      netdev_get_by_index+0x5e/0x80
[ 2129.156376][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2129.156376][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2129.156376][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2129.156376][   T72]      ipv6_add_addr+0x411/0x2000
[ 2129.156376][   T72]      inet6_addr_add+0x30e/0xa40
[ 2129.156376][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2129.156376][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.156376][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.156376][   T72]      netlink_unicast+0x449/0x710
[ 2129.156376][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.156376][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.156376][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.156376][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.156376][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.156376][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.156376][   T72] 
[ 2129.158854][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2129.158854][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2129.158854][   T72]      ipv6_find_idev+0x102/0x170
[ 2129.158854][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2129.158854][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.158854][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.158854][   T72]      netlink_unicast+0x449/0x710
[ 2129.158854][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.158854][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.158854][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.158854][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.158854][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.158854][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.158854][   T72] 
[ 2129.160377][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2129.160377][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2129.160377][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2129.160377][   T72]      ipv6_find_idev+0x102/0x170
[ 2129.160377][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2129.160377][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2129.160377][   T72]      netlink_rcv_skb+0x130/0x360
[ 2129.160377][   T72]      netlink_unicast+0x449/0x710
[ 2129.160377][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2129.160377][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2129.160377][   T72]      ___sys_sendmsg+0xee/0x170
[ 2129.160377][   T72]      __sys_sendmsg+0xcd/0x170
[ 2129.160377][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.160377][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.160377][   T72] 
[ 2129.162034][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2129.162276][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2129.162276][   T72]      dst_init+0x84/0x4a0
[ 2129.162276][   T72]      dst_alloc+0x97/0x150
[ 2129.162276][   T72]      ip6_dst_alloc+0x23/0x90
[ 2129.162276][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2129.162276][   T72]      ip6_pol_route+0x56f/0x840
[ 2129.162276][   T72]      fib6_rule_lookup+0x227/0x600
[ 2129.162276][   T72]      ip6_route_output_flags+0x251/0x460
[ 2129.162276][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2129.162276][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2129.162276][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2129.162276][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2129.162276][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2129.162276][   T72]      __sys_connect+0x217/0x2a0
[ 2129.162276][   T72]      __x64_sys_connect+0x72/0xb0
[ 2129.162276][   T72]      do_syscall_64+0xc6/0x1e0
[ 2129.162276][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2129.162276][   T72] 
[ 2139.412730][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2139.413185][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2139.413185][   T72]      netdev_get_by_index+0x5e/0x80
[ 2139.413185][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2139.413185][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2139.413185][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2139.413185][   T72]      ipv6_add_addr+0x411/0x2000
[ 2139.413185][   T72]      inet6_addr_add+0x30e/0xa40
[ 2139.413185][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2139.413185][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.413185][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.413185][   T72]      netlink_unicast+0x449/0x710
[ 2139.413185][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.413185][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.413185][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.413185][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.413185][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.413185][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.413185][   T72] 
[ 2139.415188][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2139.415188][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2139.415188][   T72]      ipv6_find_idev+0x102/0x170
[ 2139.415188][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2139.415188][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.415188][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.415188][   T72]      netlink_unicast+0x449/0x710
[ 2139.415188][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.415188][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.415188][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.415188][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.415188][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.415188][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.415188][   T72] 
[ 2139.417086][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2139.417086][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2139.417086][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2139.417086][   T72]      ipv6_find_idev+0x102/0x170
[ 2139.417086][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2139.417086][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.417086][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.417086][   T72]      netlink_unicast+0x449/0x710
[ 2139.417086][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.417086][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.417086][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.417086][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.417086][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.417086][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.417086][   T72] 
[ 2139.418786][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2139.419054][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2139.419054][   T72]      netdev_get_by_index+0x5e/0x80
[ 2139.419054][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2139.419054][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2139.419054][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2139.419054][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2139.419054][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2139.419054][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2139.419054][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2139.419054][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2139.419054][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2139.419054][   T72]      vfs_write+0x9e5/0x10a0
[ 2139.419054][   T72]      ksys_write+0xf5/0x1e0
[ 2139.419054][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.419054][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.419054][   T72] 
[ 2139.420916][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2139.420916][   T72]      netdev_get_by_index+0x5e/0x80
[ 2139.420916][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2139.420916][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2139.420916][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2139.420916][   T72]      ipv6_add_addr+0x411/0x2000
[ 2139.420916][   T72]      inet6_addr_add+0x30e/0xa40
[ 2139.420916][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2139.420916][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.420916][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.420916][   T72]      netlink_unicast+0x449/0x710
[ 2139.420916][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.420916][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.420916][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.420916][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.420916][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.420916][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.420916][   T72] 
[ 2139.422890][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2139.422890][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2139.422890][   T72]      ipv6_find_idev+0x102/0x170
[ 2139.422890][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2139.422890][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.422890][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.422890][   T72]      netlink_unicast+0x449/0x710
[ 2139.422890][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.422890][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.422890][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.422890][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.422890][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.422890][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.422890][   T72] 
[ 2139.424409][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2139.424409][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2139.424409][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2139.424409][   T72]      ipv6_find_idev+0x102/0x170
[ 2139.424409][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2139.424409][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2139.424409][   T72]      netlink_rcv_skb+0x130/0x360
[ 2139.424409][   T72]      netlink_unicast+0x449/0x710
[ 2139.424409][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2139.424409][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2139.424409][   T72]      ___sys_sendmsg+0xee/0x170
[ 2139.424409][   T72]      __sys_sendmsg+0xcd/0x170
[ 2139.424409][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.424409][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.424409][   T72] 
[ 2139.426063][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2139.426311][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2139.426311][   T72]      dst_init+0x84/0x4a0
[ 2139.426311][   T72]      dst_alloc+0x97/0x150
[ 2139.426311][   T72]      ip6_dst_alloc+0x23/0x90
[ 2139.426311][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2139.426311][   T72]      ip6_pol_route+0x56f/0x840
[ 2139.426311][   T72]      fib6_rule_lookup+0x227/0x600
[ 2139.426311][   T72]      ip6_route_output_flags+0x251/0x460
[ 2139.426311][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2139.426311][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2139.426311][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2139.426311][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2139.426311][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2139.426311][   T72]      __sys_connect+0x217/0x2a0
[ 2139.426311][   T72]      __x64_sys_connect+0x72/0xb0
[ 2139.426311][   T72]      do_syscall_64+0xc6/0x1e0
[ 2139.426311][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2139.426311][   T72] 
[ 2149.428699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2149.429127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2149.429127][   T72]      netdev_get_by_index+0x5e/0x80
[ 2149.429127][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2149.429127][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2149.429127][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2149.429127][   T72]      ipv6_add_addr+0x411/0x2000
[ 2149.429127][   T72]      inet6_addr_add+0x30e/0xa40
[ 2149.429127][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2149.429127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.429127][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.429127][   T72]      netlink_unicast+0x449/0x710
[ 2149.429127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.429127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.429127][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.429127][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.429127][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.429127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.429127][   T72] 
[ 2149.431109][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2149.431109][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2149.431109][   T72]      ipv6_find_idev+0x102/0x170
[ 2149.431109][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2149.431109][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.431109][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.431109][   T72]      netlink_unicast+0x449/0x710
[ 2149.431109][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.431109][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.431109][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.431109][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.431109][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.431109][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.431109][   T72] 
[ 2149.432619][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2149.432619][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2149.432619][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2149.432619][   T72]      ipv6_find_idev+0x102/0x170
[ 2149.432619][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2149.432619][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.432619][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.432619][   T72]      netlink_unicast+0x449/0x710
[ 2149.432619][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.432619][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.432619][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.432619][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.432619][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.432619][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.432619][   T72] 
[ 2149.434281][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2149.434547][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2149.434547][   T72]      netdev_get_by_index+0x5e/0x80
[ 2149.434547][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2149.434547][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2149.434547][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2149.434547][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2149.434547][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2149.434547][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2149.434547][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2149.434547][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2149.434547][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2149.434547][   T72]      vfs_write+0x9e5/0x10a0
[ 2149.434547][   T72]      ksys_write+0xf5/0x1e0
[ 2149.434547][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.434547][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.434547][   T72] 
[ 2149.436409][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2149.436409][   T72]      netdev_get_by_index+0x5e/0x80
[ 2149.436409][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2149.436409][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2149.436409][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2149.436409][   T72]      ipv6_add_addr+0x411/0x2000
[ 2149.436409][   T72]      inet6_addr_add+0x30e/0xa40
[ 2149.436409][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2149.436409][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.436409][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.436409][   T72]      netlink_unicast+0x449/0x710
[ 2149.436409][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.436409][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.436409][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.436409][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.436409][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.436409][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.436409][   T72] 
[ 2149.438390][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2149.438390][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2149.438390][   T72]      ipv6_find_idev+0x102/0x170
[ 2149.438390][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2149.438390][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.438390][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.438390][   T72]      netlink_unicast+0x449/0x710
[ 2149.438390][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.438390][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.438390][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.438390][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.438390][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.438390][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.438390][   T72] 
[ 2149.439910][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2149.439910][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2149.439910][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2149.439910][   T72]      ipv6_find_idev+0x102/0x170
[ 2149.439910][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2149.439910][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2149.439910][   T72]      netlink_rcv_skb+0x130/0x360
[ 2149.439910][   T72]      netlink_unicast+0x449/0x710
[ 2149.439910][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2149.439910][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2149.439910][   T72]      ___sys_sendmsg+0xee/0x170
[ 2149.439910][   T72]      __sys_sendmsg+0xcd/0x170
[ 2149.439910][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.439910][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.439910][   T72] 
[ 2149.441584][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2149.441834][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2149.441834][   T72]      dst_init+0x84/0x4a0
[ 2149.441834][   T72]      dst_alloc+0x97/0x150
[ 2149.441834][   T72]      ip6_dst_alloc+0x23/0x90
[ 2149.441834][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2149.441834][   T72]      ip6_pol_route+0x56f/0x840
[ 2149.441834][   T72]      fib6_rule_lookup+0x227/0x600
[ 2149.441834][   T72]      ip6_route_output_flags+0x251/0x460
[ 2149.441834][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2149.441834][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2149.441834][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2149.441834][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2149.441834][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2149.441834][   T72]      __sys_connect+0x217/0x2a0
[ 2149.441834][   T72]      __x64_sys_connect+0x72/0xb0
[ 2149.441834][   T72]      do_syscall_64+0xc6/0x1e0
[ 2149.441834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2149.441834][   T72] 
[ 2159.692701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2159.693138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2159.693138][   T72]      netdev_get_by_index+0x5e/0x80
[ 2159.693138][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2159.693138][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2159.693138][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2159.693138][   T72]      ipv6_add_addr+0x411/0x2000
[ 2159.693138][   T72]      inet6_addr_add+0x30e/0xa40
[ 2159.693138][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2159.693138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.693138][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.693138][   T72]      netlink_unicast+0x449/0x710
[ 2159.693138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.693138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.693138][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.693138][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.693138][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.693138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.693138][   T72] 
[ 2159.695146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2159.695146][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2159.695146][   T72]      ipv6_find_idev+0x102/0x170
[ 2159.695146][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2159.695146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.695146][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.695146][   T72]      netlink_unicast+0x449/0x710
[ 2159.695146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.695146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.695146][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.695146][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.695146][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.695146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.695146][   T72] 
[ 2159.696678][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2159.696678][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2159.696678][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2159.696678][   T72]      ipv6_find_idev+0x102/0x170
[ 2159.696678][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2159.696678][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.696678][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.696678][   T72]      netlink_unicast+0x449/0x710
[ 2159.696678][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.696678][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.696678][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.696678][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.696678][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.696678][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.696678][   T72] 
[ 2159.698344][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2159.698613][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2159.698613][   T72]      netdev_get_by_index+0x5e/0x80
[ 2159.698613][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2159.698613][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2159.698613][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2159.698613][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2159.698613][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2159.698613][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2159.698613][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2159.698613][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2159.698613][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2159.698613][   T72]      vfs_write+0x9e5/0x10a0
[ 2159.698613][   T72]      ksys_write+0xf5/0x1e0
[ 2159.698613][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.698613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.698613][   T72] 
[ 2159.700454][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2159.700454][   T72]      netdev_get_by_index+0x5e/0x80
[ 2159.700454][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2159.700454][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2159.700454][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2159.700454][   T72]      ipv6_add_addr+0x411/0x2000
[ 2159.700454][   T72]      inet6_addr_add+0x30e/0xa40
[ 2159.700454][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2159.700454][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.700454][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.700454][   T72]      netlink_unicast+0x449/0x710
[ 2159.700454][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.700454][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.700454][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.700454][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.700454][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.700454][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.700454][   T72] 
[ 2159.702412][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2159.702412][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2159.702412][   T72]      ipv6_find_idev+0x102/0x170
[ 2159.702412][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2159.702412][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.702412][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.702412][   T72]      netlink_unicast+0x449/0x710
[ 2159.702412][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.702412][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.702412][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.702412][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.702412][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.702412][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.702412][   T72] 
[ 2159.703928][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2159.703928][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2159.703928][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2159.703928][   T72]      ipv6_find_idev+0x102/0x170
[ 2159.703928][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2159.703928][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2159.703928][   T72]      netlink_rcv_skb+0x130/0x360
[ 2159.703928][   T72]      netlink_unicast+0x449/0x710
[ 2159.703928][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2159.703928][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2159.703928][   T72]      ___sys_sendmsg+0xee/0x170
[ 2159.703928][   T72]      __sys_sendmsg+0xcd/0x170
[ 2159.703928][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.703928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.703928][   T72] 
[ 2159.705596][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2159.705842][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2159.705842][   T72]      dst_init+0x84/0x4a0
[ 2159.705842][   T72]      dst_alloc+0x97/0x150
[ 2159.705842][   T72]      ip6_dst_alloc+0x23/0x90
[ 2159.705842][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2159.705842][   T72]      ip6_pol_route+0x56f/0x840
[ 2159.705842][   T72]      fib6_rule_lookup+0x227/0x600
[ 2159.705842][   T72]      ip6_route_output_flags+0x251/0x460
[ 2159.705842][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2159.705842][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2159.705842][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2159.705842][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2159.705842][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2159.705842][   T72]      __sys_connect+0x217/0x2a0
[ 2159.705842][   T72]      __x64_sys_connect+0x72/0xb0
[ 2159.705842][   T72]      do_syscall_64+0xc6/0x1e0
[ 2159.705842][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2159.705842][   T72] 
[ 2169.948703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2169.949154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2169.949154][   T72]      netdev_get_by_index+0x5e/0x80
[ 2169.949154][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2169.949154][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2169.949154][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2169.949154][   T72]      ipv6_add_addr+0x411/0x2000
[ 2169.949154][   T72]      inet6_addr_add+0x30e/0xa40
[ 2169.949154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2169.949154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.949154][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.949154][   T72]      netlink_unicast+0x449/0x710
[ 2169.949154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.949154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.949154][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.949154][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.949154][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.949154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.949154][   T72] 
[ 2169.951152][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2169.951152][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2169.951152][   T72]      ipv6_find_idev+0x102/0x170
[ 2169.951152][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2169.951152][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.951152][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.951152][   T72]      netlink_unicast+0x449/0x710
[ 2169.951152][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.951152][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.951152][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.951152][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.951152][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.951152][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.951152][   T72] 
[ 2169.952686][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2169.952686][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2169.952686][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2169.952686][   T72]      ipv6_find_idev+0x102/0x170
[ 2169.952686][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2169.952686][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.952686][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.952686][   T72]      netlink_unicast+0x449/0x710
[ 2169.952686][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.952686][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.952686][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.952686][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.952686][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.952686][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.952686][   T72] 
[ 2169.954350][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2169.954627][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2169.954627][   T72]      netdev_get_by_index+0x5e/0x80
[ 2169.954627][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2169.954627][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2169.954627][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2169.954627][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2169.954627][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2169.954627][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2169.954627][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2169.954627][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2169.954627][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2169.954627][   T72]      vfs_write+0x9e5/0x10a0
[ 2169.954627][   T72]      ksys_write+0xf5/0x1e0
[ 2169.954627][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.954627][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.954627][   T72] 
[ 2169.956472][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2169.956472][   T72]      netdev_get_by_index+0x5e/0x80
[ 2169.956472][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2169.956472][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2169.956472][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2169.956472][   T72]      ipv6_add_addr+0x411/0x2000
[ 2169.956472][   T72]      inet6_addr_add+0x30e/0xa40
[ 2169.956472][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2169.956472][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.956472][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.956472][   T72]      netlink_unicast+0x449/0x710
[ 2169.956472][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.956472][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.956472][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.956472][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.956472][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.956472][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.956472][   T72] 
[ 2169.958441][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2169.958441][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2169.958441][   T72]      ipv6_find_idev+0x102/0x170
[ 2169.958441][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2169.958441][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.958441][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.958441][   T72]      netlink_unicast+0x449/0x710
[ 2169.958441][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.958441][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.958441][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.958441][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.958441][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.958441][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.958441][   T72] 
[ 2169.959965][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2169.959965][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2169.959965][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2169.959965][   T72]      ipv6_find_idev+0x102/0x170
[ 2169.959965][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2169.959965][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2169.959965][   T72]      netlink_rcv_skb+0x130/0x360
[ 2169.959965][   T72]      netlink_unicast+0x449/0x710
[ 2169.959965][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2169.959965][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2169.959965][   T72]      ___sys_sendmsg+0xee/0x170
[ 2169.959965][   T72]      __sys_sendmsg+0xcd/0x170
[ 2169.959965][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.959965][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.959965][   T72] 
[ 2169.961632][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2169.961865][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2169.961865][   T72]      dst_init+0x84/0x4a0
[ 2169.961865][   T72]      dst_alloc+0x97/0x150
[ 2169.961865][   T72]      ip6_dst_alloc+0x23/0x90
[ 2169.961865][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2169.961865][   T72]      ip6_pol_route+0x56f/0x840
[ 2169.961865][   T72]      fib6_rule_lookup+0x227/0x600
[ 2169.961865][   T72]      ip6_route_output_flags+0x251/0x460
[ 2169.961865][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2169.961865][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2169.961865][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2169.961865][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2169.961865][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2169.961865][   T72]      __sys_connect+0x217/0x2a0
[ 2169.961865][   T72]      __x64_sys_connect+0x72/0xb0
[ 2169.961865][   T72]      do_syscall_64+0xc6/0x1e0
[ 2169.961865][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2169.961865][   T72] 
[ 2180.204655][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2180.205085][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2180.205085][   T72]      netdev_get_by_index+0x5e/0x80
[ 2180.205085][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2180.205085][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2180.205085][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2180.205085][   T72]      ipv6_add_addr+0x411/0x2000
[ 2180.205085][   T72]      inet6_addr_add+0x30e/0xa40
[ 2180.205085][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2180.205085][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.205085][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.205085][   T72]      netlink_unicast+0x449/0x710
[ 2180.205085][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.205085][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.205085][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.205085][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.205085][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.205085][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.205085][   T72] 
[ 2180.207069][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2180.207069][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2180.207069][   T72]      ipv6_find_idev+0x102/0x170
[ 2180.207069][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2180.207069][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.207069][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.207069][   T72]      netlink_unicast+0x449/0x710
[ 2180.207069][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.207069][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.207069][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.207069][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.207069][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.207069][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.207069][   T72] 
[ 2180.208584][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2180.208584][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2180.208584][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2180.208584][   T72]      ipv6_find_idev+0x102/0x170
[ 2180.208584][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2180.208584][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.208584][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.208584][   T72]      netlink_unicast+0x449/0x710
[ 2180.208584][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.208584][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.208584][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.208584][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.208584][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.208584][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.208584][   T72] 
[ 2180.210244][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2180.210511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2180.210511][   T72]      netdev_get_by_index+0x5e/0x80
[ 2180.210511][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2180.210511][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2180.210511][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2180.210511][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2180.210511][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2180.210511][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2180.210511][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2180.210511][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2180.210511][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2180.210511][   T72]      vfs_write+0x9e5/0x10a0
[ 2180.210511][   T72]      ksys_write+0xf5/0x1e0
[ 2180.210511][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.210511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.210511][   T72] 
[ 2180.212346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2180.212346][   T72]      netdev_get_by_index+0x5e/0x80
[ 2180.212346][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2180.212346][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2180.212346][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2180.212346][   T72]      ipv6_add_addr+0x411/0x2000
[ 2180.212346][   T72]      inet6_addr_add+0x30e/0xa40
[ 2180.212346][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2180.212346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.212346][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.212346][   T72]      netlink_unicast+0x449/0x710
[ 2180.212346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.212346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.212346][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.212346][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.212346][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.212346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.212346][   T72] 
[ 2180.214385][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2180.214385][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2180.214385][   T72]      ipv6_find_idev+0x102/0x170
[ 2180.214385][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2180.214385][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.214385][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.214385][   T72]      netlink_unicast+0x449/0x710
[ 2180.214385][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.214385][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.214385][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.214385][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.214385][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.214385][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.214385][   T72] 
[ 2180.215920][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2180.215920][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2180.215920][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2180.215920][   T72]      ipv6_find_idev+0x102/0x170
[ 2180.215920][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2180.215920][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2180.215920][   T72]      netlink_rcv_skb+0x130/0x360
[ 2180.215920][   T72]      netlink_unicast+0x449/0x710
[ 2180.215920][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2180.215920][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2180.215920][   T72]      ___sys_sendmsg+0xee/0x170
[ 2180.215920][   T72]      __sys_sendmsg+0xcd/0x170
[ 2180.215920][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.215920][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.215920][   T72] 
[ 2180.217966][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2180.218269][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2180.218269][   T72]      dst_init+0x84/0x4a0
[ 2180.218269][   T72]      dst_alloc+0x97/0x150
[ 2180.218269][   T72]      ip6_dst_alloc+0x23/0x90
[ 2180.218269][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2180.218269][   T72]      ip6_pol_route+0x56f/0x840
[ 2180.218269][   T72]      fib6_rule_lookup+0x227/0x600
[ 2180.218269][   T72]      ip6_route_output_flags+0x251/0x460
[ 2180.218269][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2180.218269][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2180.218269][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2180.218269][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2180.218269][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2180.218269][   T72]      __sys_connect+0x217/0x2a0
[ 2180.218269][   T72]      __x64_sys_connect+0x72/0xb0
[ 2180.218269][   T72]      do_syscall_64+0xc6/0x1e0
[ 2180.218269][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2180.218269][   T72] 
[ 2190.460698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2190.461146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2190.461146][   T72]      netdev_get_by_index+0x5e/0x80
[ 2190.461146][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2190.461146][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2190.461146][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2190.461146][   T72]      ipv6_add_addr+0x411/0x2000
[ 2190.461146][   T72]      inet6_addr_add+0x30e/0xa40
[ 2190.461146][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2190.461146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.461146][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.461146][   T72]      netlink_unicast+0x449/0x710
[ 2190.461146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.461146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.461146][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.461146][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.461146][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.461146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.461146][   T72] 
[ 2190.463333][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2190.463333][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2190.463333][   T72]      ipv6_find_idev+0x102/0x170
[ 2190.463333][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2190.463333][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.463333][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.463333][   T72]      netlink_unicast+0x449/0x710
[ 2190.463333][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.463333][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.463333][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.463333][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.463333][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.463333][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.463333][   T72] 
[ 2190.465336][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2190.465336][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2190.465336][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2190.465336][   T72]      ipv6_find_idev+0x102/0x170
[ 2190.465336][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2190.465336][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.465336][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.465336][   T72]      netlink_unicast+0x449/0x710
[ 2190.465336][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.465336][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.465336][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.465336][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.465336][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.465336][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.465336][   T72] 
[ 2190.467521][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2190.467864][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2190.467864][   T72]      netdev_get_by_index+0x5e/0x80
[ 2190.467864][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2190.467864][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2190.467864][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2190.467864][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2190.467864][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2190.467864][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2190.467864][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2190.467864][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2190.467864][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2190.467864][   T72]      vfs_write+0x9e5/0x10a0
[ 2190.467864][   T72]      ksys_write+0xf5/0x1e0
[ 2190.467864][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.467864][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.467864][   T72] 
[ 2190.470280][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2190.470280][   T72]      netdev_get_by_index+0x5e/0x80
[ 2190.470280][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2190.470280][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2190.470280][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2190.470280][   T72]      ipv6_add_addr+0x411/0x2000
[ 2190.470280][   T72]      inet6_addr_add+0x30e/0xa40
[ 2190.470280][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2190.470280][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.470280][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.470280][   T72]      netlink_unicast+0x449/0x710
[ 2190.470280][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.470280][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.470280][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.470280][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.470280][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.470280][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.470280][   T72] 
[ 2190.472852][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2190.472852][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2190.472852][   T72]      ipv6_find_idev+0x102/0x170
[ 2190.472852][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2190.472852][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.472852][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.472852][   T72]      netlink_unicast+0x449/0x710
[ 2190.472852][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.472852][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.472852][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.472852][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.472852][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.472852][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.472852][   T72] 
[ 2190.474832][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2190.474832][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2190.474832][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2190.474832][   T72]      ipv6_find_idev+0x102/0x170
[ 2190.474832][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2190.474832][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2190.474832][   T72]      netlink_rcv_skb+0x130/0x360
[ 2190.474832][   T72]      netlink_unicast+0x449/0x710
[ 2190.474832][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2190.474832][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2190.474832][   T72]      ___sys_sendmsg+0xee/0x170
[ 2190.474832][   T72]      __sys_sendmsg+0xcd/0x170
[ 2190.474832][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.474832][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.474832][   T72] 
[ 2190.476991][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2190.477293][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2190.477293][   T72]      dst_init+0x84/0x4a0
[ 2190.477293][   T72]      dst_alloc+0x97/0x150
[ 2190.477293][   T72]      ip6_dst_alloc+0x23/0x90
[ 2190.477293][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2190.477293][   T72]      ip6_pol_route+0x56f/0x840
[ 2190.477293][   T72]      fib6_rule_lookup+0x227/0x600
[ 2190.477293][   T72]      ip6_route_output_flags+0x251/0x460
[ 2190.477293][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2190.477293][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2190.477293][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2190.477293][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2190.477293][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2190.477293][   T72]      __sys_connect+0x217/0x2a0
[ 2190.477293][   T72]      __x64_sys_connect+0x72/0xb0
[ 2190.477293][   T72]      do_syscall_64+0xc6/0x1e0
[ 2190.477293][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2190.477293][   T72] 
[ 2200.716695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2200.717141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2200.717141][   T72]      netdev_get_by_index+0x5e/0x80
[ 2200.717141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2200.717141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2200.717141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2200.717141][   T72]      ipv6_add_addr+0x411/0x2000
[ 2200.717141][   T72]      inet6_addr_add+0x30e/0xa40
[ 2200.717141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2200.717141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.717141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.717141][   T72]      netlink_unicast+0x449/0x710
[ 2200.717141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.717141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.717141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.717141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.717141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.717141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.717141][   T72] 
[ 2200.719150][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2200.719150][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2200.719150][   T72]      ipv6_find_idev+0x102/0x170
[ 2200.719150][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2200.719150][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.719150][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.719150][   T72]      netlink_unicast+0x449/0x710
[ 2200.719150][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.719150][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.719150][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.719150][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.719150][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.719150][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.719150][   T72] 
[ 2200.720688][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2200.720688][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2200.720688][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2200.720688][   T72]      ipv6_find_idev+0x102/0x170
[ 2200.720688][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2200.720688][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.720688][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.720688][   T72]      netlink_unicast+0x449/0x710
[ 2200.720688][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.720688][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.720688][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.720688][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.720688][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.720688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.720688][   T72] 
[ 2200.722352][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2200.722629][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2200.722629][   T72]      netdev_get_by_index+0x5e/0x80
[ 2200.722629][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2200.722629][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2200.722629][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2200.722629][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2200.722629][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2200.722629][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2200.722629][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2200.722629][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2200.722629][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2200.722629][   T72]      vfs_write+0x9e5/0x10a0
[ 2200.722629][   T72]      ksys_write+0xf5/0x1e0
[ 2200.722629][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.722629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.722629][   T72] 
[ 2200.724448][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2200.724448][   T72]      netdev_get_by_index+0x5e/0x80
[ 2200.724448][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2200.724448][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2200.724448][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2200.724448][   T72]      ipv6_add_addr+0x411/0x2000
[ 2200.724448][   T72]      inet6_addr_add+0x30e/0xa40
[ 2200.724448][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2200.724448][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.724448][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.724448][   T72]      netlink_unicast+0x449/0x710
[ 2200.724448][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.724448][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.724448][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.724448][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.724448][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.724448][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.724448][   T72] 
[ 2200.726420][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2200.726420][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2200.726420][   T72]      ipv6_find_idev+0x102/0x170
[ 2200.726420][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2200.726420][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.726420][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.726420][   T72]      netlink_unicast+0x449/0x710
[ 2200.726420][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.726420][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.726420][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.726420][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.726420][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.726420][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.726420][   T72] 
[ 2200.727942][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2200.727942][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2200.727942][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2200.727942][   T72]      ipv6_find_idev+0x102/0x170
[ 2200.727942][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2200.727942][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2200.727942][   T72]      netlink_rcv_skb+0x130/0x360
[ 2200.727942][   T72]      netlink_unicast+0x449/0x710
[ 2200.727942][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2200.727942][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2200.727942][   T72]      ___sys_sendmsg+0xee/0x170
[ 2200.727942][   T72]      __sys_sendmsg+0xcd/0x170
[ 2200.727942][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.727942][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.727942][   T72] 
[ 2200.729616][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2200.729858][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2200.729858][   T72]      dst_init+0x84/0x4a0
[ 2200.729858][   T72]      dst_alloc+0x97/0x150
[ 2200.729858][   T72]      ip6_dst_alloc+0x23/0x90
[ 2200.729858][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2200.729858][   T72]      ip6_pol_route+0x56f/0x840
[ 2200.729858][   T72]      fib6_rule_lookup+0x227/0x600
[ 2200.729858][   T72]      ip6_route_output_flags+0x251/0x460
[ 2200.729858][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2200.729858][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2200.729858][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2200.729858][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2200.729858][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2200.729858][   T72]      __sys_connect+0x217/0x2a0
[ 2200.729858][   T72]      __x64_sys_connect+0x72/0xb0
[ 2200.729858][   T72]      do_syscall_64+0xc6/0x1e0
[ 2200.729858][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2200.729858][   T72] 
[ 2210.972702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2210.973154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2210.973154][   T72]      netdev_get_by_index+0x5e/0x80
[ 2210.973154][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2210.973154][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2210.973154][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2210.973154][   T72]      ipv6_add_addr+0x411/0x2000
[ 2210.973154][   T72]      inet6_addr_add+0x30e/0xa40
[ 2210.973154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2210.973154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.973154][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.973154][   T72]      netlink_unicast+0x449/0x710
[ 2210.973154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.973154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.973154][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.973154][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.973154][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.973154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.973154][   T72] 
[ 2210.975149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2210.975149][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2210.975149][   T72]      ipv6_find_idev+0x102/0x170
[ 2210.975149][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2210.975149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.975149][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.975149][   T72]      netlink_unicast+0x449/0x710
[ 2210.975149][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.975149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.975149][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.975149][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.975149][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.975149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.975149][   T72] 
[ 2210.976678][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2210.976678][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2210.976678][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2210.976678][   T72]      ipv6_find_idev+0x102/0x170
[ 2210.976678][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2210.976678][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.976678][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.976678][   T72]      netlink_unicast+0x449/0x710
[ 2210.976678][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.976678][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.976678][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.976678][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.976678][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.976678][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.976678][   T72] 
[ 2210.978370][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2210.978652][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2210.978652][   T72]      netdev_get_by_index+0x5e/0x80
[ 2210.978652][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2210.978652][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2210.978652][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2210.978652][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2210.978652][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2210.978652][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2210.978652][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2210.978652][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2210.978652][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2210.978652][   T72]      vfs_write+0x9e5/0x10a0
[ 2210.978652][   T72]      ksys_write+0xf5/0x1e0
[ 2210.978652][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.978652][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.978652][   T72] 
[ 2210.980589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2210.980589][   T72]      netdev_get_by_index+0x5e/0x80
[ 2210.980589][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2210.980589][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2210.980589][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2210.980589][   T72]      ipv6_add_addr+0x411/0x2000
[ 2210.980589][   T72]      inet6_addr_add+0x30e/0xa40
[ 2210.980589][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2210.980589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.980589][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.980589][   T72]      netlink_unicast+0x449/0x710
[ 2210.980589][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.980589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.980589][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.980589][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.980589][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.980589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.980589][   T72] 
[ 2210.982569][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2210.982569][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2210.982569][   T72]      ipv6_find_idev+0x102/0x170
[ 2210.982569][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2210.982569][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.982569][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.982569][   T72]      netlink_unicast+0x449/0x710
[ 2210.982569][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.982569][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.982569][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.982569][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.982569][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.982569][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.982569][   T72] 
[ 2210.984099][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2210.984099][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2210.984099][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2210.984099][   T72]      ipv6_find_idev+0x102/0x170
[ 2210.984099][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2210.984099][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2210.984099][   T72]      netlink_rcv_skb+0x130/0x360
[ 2210.984099][   T72]      netlink_unicast+0x449/0x710
[ 2210.984099][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2210.984099][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2210.984099][   T72]      ___sys_sendmsg+0xee/0x170
[ 2210.984099][   T72]      __sys_sendmsg+0xcd/0x170
[ 2210.984099][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.984099][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.984099][   T72] 
[ 2210.985808][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2210.986070][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2210.986070][   T72]      dst_init+0x84/0x4a0
[ 2210.986070][   T72]      dst_alloc+0x97/0x150
[ 2210.986070][   T72]      ip6_dst_alloc+0x23/0x90
[ 2210.986070][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2210.986070][   T72]      ip6_pol_route+0x56f/0x840
[ 2210.986070][   T72]      fib6_rule_lookup+0x227/0x600
[ 2210.986070][   T72]      ip6_route_output_flags+0x251/0x460
[ 2210.986070][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2210.986070][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2210.986070][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2210.986070][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2210.986070][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2210.986070][   T72]      __sys_connect+0x217/0x2a0
[ 2210.986070][   T72]      __x64_sys_connect+0x72/0xb0
[ 2210.986070][   T72]      do_syscall_64+0xc6/0x1e0
[ 2210.986070][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2210.986070][   T72] 
[ 2221.092701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2221.093110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2221.093110][   T72]      netdev_get_by_index+0x5e/0x80
[ 2221.093110][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2221.093110][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2221.093110][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2221.093110][   T72]      ipv6_add_addr+0x411/0x2000
[ 2221.093110][   T72]      inet6_addr_add+0x30e/0xa40
[ 2221.093110][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2221.093110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.093110][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.093110][   T72]      netlink_unicast+0x449/0x710
[ 2221.093110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.093110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.093110][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.093110][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.093110][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.093110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.093110][   T72] 
[ 2221.095098][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2221.095098][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2221.095098][   T72]      ipv6_find_idev+0x102/0x170
[ 2221.095098][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2221.095098][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.095098][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.095098][   T72]      netlink_unicast+0x449/0x710
[ 2221.095098][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.095098][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.095098][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.095098][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.095098][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.095098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.095098][   T72] 
[ 2221.096631][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2221.096631][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2221.096631][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2221.096631][   T72]      ipv6_find_idev+0x102/0x170
[ 2221.096631][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2221.096631][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.096631][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.096631][   T72]      netlink_unicast+0x449/0x710
[ 2221.096631][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.096631][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.096631][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.096631][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.096631][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.096631][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.096631][   T72] 
[ 2221.098313][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2221.098584][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2221.098584][   T72]      netdev_get_by_index+0x5e/0x80
[ 2221.098584][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2221.098584][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2221.098584][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2221.098584][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2221.098584][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2221.098584][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2221.098584][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2221.098584][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2221.098584][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2221.098584][   T72]      vfs_write+0x9e5/0x10a0
[ 2221.098584][   T72]      ksys_write+0xf5/0x1e0
[ 2221.098584][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.098584][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.098584][   T72] 
[ 2221.100497][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2221.100497][   T72]      netdev_get_by_index+0x5e/0x80
[ 2221.100497][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2221.100497][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2221.100497][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2221.100497][   T72]      ipv6_add_addr+0x411/0x2000
[ 2221.100497][   T72]      inet6_addr_add+0x30e/0xa40
[ 2221.100497][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2221.100497][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.100497][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.100497][   T72]      netlink_unicast+0x449/0x710
[ 2221.100497][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.100497][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.100497][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.100497][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.100497][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.100497][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.100497][   T72] 
[ 2221.102484][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2221.102484][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2221.102484][   T72]      ipv6_find_idev+0x102/0x170
[ 2221.102484][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2221.102484][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.102484][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.102484][   T72]      netlink_unicast+0x449/0x710
[ 2221.102484][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.102484][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.102484][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.102484][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.102484][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.102484][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.102484][   T72] 
[ 2221.104014][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2221.104014][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2221.104014][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2221.104014][   T72]      ipv6_find_idev+0x102/0x170
[ 2221.104014][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2221.104014][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2221.104014][   T72]      netlink_rcv_skb+0x130/0x360
[ 2221.104014][   T72]      netlink_unicast+0x449/0x710
[ 2221.104014][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2221.104014][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2221.104014][   T72]      ___sys_sendmsg+0xee/0x170
[ 2221.104014][   T72]      __sys_sendmsg+0xcd/0x170
[ 2221.104014][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.104014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.104014][   T72] 
[ 2221.105685][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2221.105924][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2221.105924][   T72]      dst_init+0x84/0x4a0
[ 2221.105924][   T72]      dst_alloc+0x97/0x150
[ 2221.105924][   T72]      ip6_dst_alloc+0x23/0x90
[ 2221.105924][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2221.105924][   T72]      ip6_pol_route+0x56f/0x840
[ 2221.105924][   T72]      fib6_rule_lookup+0x227/0x600
[ 2221.105924][   T72]      ip6_route_output_flags+0x251/0x460
[ 2221.105924][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2221.105924][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2221.105924][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2221.105924][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2221.105924][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2221.105924][   T72]      __sys_connect+0x217/0x2a0
[ 2221.105924][   T72]      __x64_sys_connect+0x72/0xb0
[ 2221.105924][   T72]      do_syscall_64+0xc6/0x1e0
[ 2221.105924][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2221.105924][   T72] 
[ 2231.348636][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2231.349068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2231.349068][   T72]      netdev_get_by_index+0x5e/0x80
[ 2231.349068][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2231.349068][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2231.349068][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2231.349068][   T72]      ipv6_add_addr+0x411/0x2000
[ 2231.349068][   T72]      inet6_addr_add+0x30e/0xa40
[ 2231.349068][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2231.349068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.349068][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.349068][   T72]      netlink_unicast+0x449/0x710
[ 2231.349068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.349068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.349068][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.349068][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.349068][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.349068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.349068][   T72] 
[ 2231.351127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2231.351127][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2231.351127][   T72]      ipv6_find_idev+0x102/0x170
[ 2231.351127][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2231.351127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.351127][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.351127][   T72]      netlink_unicast+0x449/0x710
[ 2231.351127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.351127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.351127][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.351127][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.351127][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.351127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.351127][   T72] 
[ 2231.352660][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2231.352660][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2231.352660][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2231.352660][   T72]      ipv6_find_idev+0x102/0x170
[ 2231.352660][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2231.352660][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.352660][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.352660][   T72]      netlink_unicast+0x449/0x710
[ 2231.352660][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.352660][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.352660][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.352660][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.352660][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.352660][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.352660][   T72] 
[ 2231.354336][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2231.354601][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2231.354601][   T72]      netdev_get_by_index+0x5e/0x80
[ 2231.354601][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2231.354601][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2231.354601][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2231.354601][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2231.354601][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2231.354601][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2231.354601][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2231.354601][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2231.354601][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2231.354601][   T72]      vfs_write+0x9e5/0x10a0
[ 2231.354601][   T72]      ksys_write+0xf5/0x1e0
[ 2231.354601][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.354601][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.354601][   T72] 
[ 2231.356444][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2231.356444][   T72]      netdev_get_by_index+0x5e/0x80
[ 2231.356444][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2231.356444][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2231.356444][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2231.356444][   T72]      ipv6_add_addr+0x411/0x2000
[ 2231.356444][   T72]      inet6_addr_add+0x30e/0xa40
[ 2231.356444][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2231.356444][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.356444][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.356444][   T72]      netlink_unicast+0x449/0x710
[ 2231.356444][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.356444][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.356444][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.356444][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.356444][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.356444][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.356444][   T72] 
[ 2231.358414][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2231.358414][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2231.358414][   T72]      ipv6_find_idev+0x102/0x170
[ 2231.358414][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2231.358414][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.358414][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.358414][   T72]      netlink_unicast+0x449/0x710
[ 2231.358414][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.358414][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.358414][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.358414][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.358414][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.358414][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.358414][   T72] 
[ 2231.360322][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2231.360322][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2231.360322][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2231.360322][   T72]      ipv6_find_idev+0x102/0x170
[ 2231.360322][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2231.360322][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2231.360322][   T72]      netlink_rcv_skb+0x130/0x360
[ 2231.360322][   T72]      netlink_unicast+0x449/0x710
[ 2231.360322][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2231.360322][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2231.360322][   T72]      ___sys_sendmsg+0xee/0x170
[ 2231.360322][   T72]      __sys_sendmsg+0xcd/0x170
[ 2231.360322][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.360322][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.360322][   T72] 
[ 2231.362439][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2231.362743][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2231.362743][   T72]      dst_init+0x84/0x4a0
[ 2231.362743][   T72]      dst_alloc+0x97/0x150
[ 2231.362743][   T72]      ip6_dst_alloc+0x23/0x90
[ 2231.362743][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2231.362743][   T72]      ip6_pol_route+0x56f/0x840
[ 2231.362743][   T72]      fib6_rule_lookup+0x227/0x600
[ 2231.362743][   T72]      ip6_route_output_flags+0x251/0x460
[ 2231.362743][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2231.362743][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2231.362743][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2231.362743][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2231.362743][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2231.362743][   T72]      __sys_connect+0x217/0x2a0
[ 2231.362743][   T72]      __x64_sys_connect+0x72/0xb0
[ 2231.362743][   T72]      do_syscall_64+0xc6/0x1e0
[ 2231.362743][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2231.362743][   T72] 
[ 2241.604699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2241.605080][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2241.605080][   T72]      netdev_get_by_index+0x5e/0x80
[ 2241.605080][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2241.605080][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2241.605080][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2241.605080][   T72]      ipv6_add_addr+0x411/0x2000
[ 2241.605080][   T72]      inet6_addr_add+0x30e/0xa40
[ 2241.605080][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2241.605080][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.605080][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.605080][   T72]      netlink_unicast+0x449/0x710
[ 2241.605080][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.605080][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.605080][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.605080][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.605080][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.605080][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.605080][   T72] 
[ 2241.607076][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2241.607076][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2241.607076][   T72]      ipv6_find_idev+0x102/0x170
[ 2241.607076][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2241.607076][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.607076][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.607076][   T72]      netlink_unicast+0x449/0x710
[ 2241.607076][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.607076][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.607076][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.607076][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.607076][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.607076][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.607076][   T72] 
[ 2241.608594][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2241.608594][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2241.608594][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2241.608594][   T72]      ipv6_find_idev+0x102/0x170
[ 2241.608594][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2241.608594][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.608594][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.608594][   T72]      netlink_unicast+0x449/0x710
[ 2241.608594][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.608594][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.608594][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.608594][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.608594][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.608594][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.608594][   T72] 
[ 2241.610343][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2241.610612][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2241.610612][   T72]      netdev_get_by_index+0x5e/0x80
[ 2241.610612][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2241.610612][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2241.610612][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2241.610612][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2241.610612][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2241.610612][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2241.610612][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2241.610612][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2241.610612][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2241.610612][   T72]      vfs_write+0x9e5/0x10a0
[ 2241.610612][   T72]      ksys_write+0xf5/0x1e0
[ 2241.610612][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.610612][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.610612][   T72] 
[ 2241.612781][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2241.612781][   T72]      netdev_get_by_index+0x5e/0x80
[ 2241.612781][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2241.612781][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2241.612781][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2241.612781][   T72]      ipv6_add_addr+0x411/0x2000
[ 2241.612781][   T72]      inet6_addr_add+0x30e/0xa40
[ 2241.612781][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2241.612781][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.612781][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.612781][   T72]      netlink_unicast+0x449/0x710
[ 2241.612781][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.612781][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.612781][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.612781][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.612781][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.612781][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.612781][   T72] 
[ 2241.615352][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2241.615352][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2241.615352][   T72]      ipv6_find_idev+0x102/0x170
[ 2241.615352][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2241.615352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.615352][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.615352][   T72]      netlink_unicast+0x449/0x710
[ 2241.615352][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.615352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.615352][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.615352][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.615352][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.615352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.615352][   T72] 
[ 2241.617347][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2241.617347][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2241.617347][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2241.617347][   T72]      ipv6_find_idev+0x102/0x170
[ 2241.617347][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2241.617347][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2241.617347][   T72]      netlink_rcv_skb+0x130/0x360
[ 2241.617347][   T72]      netlink_unicast+0x449/0x710
[ 2241.617347][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2241.617347][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2241.617347][   T72]      ___sys_sendmsg+0xee/0x170
[ 2241.617347][   T72]      __sys_sendmsg+0xcd/0x170
[ 2241.617347][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.617347][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.617347][   T72] 
[ 2241.619510][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2241.619844][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2241.619844][   T72]      dst_init+0x84/0x4a0
[ 2241.619844][   T72]      dst_alloc+0x97/0x150
[ 2241.619844][   T72]      ip6_dst_alloc+0x23/0x90
[ 2241.619844][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2241.619844][   T72]      ip6_pol_route+0x56f/0x840
[ 2241.619844][   T72]      fib6_rule_lookup+0x227/0x600
[ 2241.619844][   T72]      ip6_route_output_flags+0x251/0x460
[ 2241.619844][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2241.619844][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2241.619844][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2241.619844][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2241.619844][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2241.619844][   T72]      __sys_connect+0x217/0x2a0
[ 2241.619844][   T72]      __x64_sys_connect+0x72/0xb0
[ 2241.619844][   T72]      do_syscall_64+0xc6/0x1e0
[ 2241.619844][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2241.619844][   T72] 
[ 2251.748700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2251.749078][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2251.749078][   T72]      netdev_get_by_index+0x5e/0x80
[ 2251.749078][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2251.749078][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2251.749078][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2251.749078][   T72]      ipv6_add_addr+0x411/0x2000
[ 2251.749078][   T72]      inet6_addr_add+0x30e/0xa40
[ 2251.749078][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2251.749078][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.749078][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.749078][   T72]      netlink_unicast+0x449/0x710
[ 2251.749078][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.749078][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.749078][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.749078][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.749078][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.749078][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.749078][   T72] 
[ 2251.751093][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2251.751093][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2251.751093][   T72]      ipv6_find_idev+0x102/0x170
[ 2251.751093][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2251.751093][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.751093][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.751093][   T72]      netlink_unicast+0x449/0x710
[ 2251.751093][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.751093][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.751093][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.751093][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.751093][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.751093][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.751093][   T72] 
[ 2251.752610][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2251.752610][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2251.752610][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2251.752610][   T72]      ipv6_find_idev+0x102/0x170
[ 2251.752610][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2251.752610][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.752610][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.752610][   T72]      netlink_unicast+0x449/0x710
[ 2251.752610][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.752610][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.752610][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.752610][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.752610][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.752610][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.752610][   T72] 
[ 2251.754272][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2251.754540][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2251.754540][   T72]      netdev_get_by_index+0x5e/0x80
[ 2251.754540][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2251.754540][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2251.754540][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2251.754540][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2251.754540][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2251.754540][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2251.754540][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2251.754540][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2251.754540][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2251.754540][   T72]      vfs_write+0x9e5/0x10a0
[ 2251.754540][   T72]      ksys_write+0xf5/0x1e0
[ 2251.754540][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.754540][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.754540][   T72] 
[ 2251.756363][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2251.756363][   T72]      netdev_get_by_index+0x5e/0x80
[ 2251.756363][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2251.756363][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2251.756363][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2251.756363][   T72]      ipv6_add_addr+0x411/0x2000
[ 2251.756363][   T72]      inet6_addr_add+0x30e/0xa40
[ 2251.756363][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2251.756363][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.756363][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.756363][   T72]      netlink_unicast+0x449/0x710
[ 2251.756363][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.756363][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.756363][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.756363][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.756363][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.756363][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.756363][   T72] 
[ 2251.758328][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2251.758328][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2251.758328][   T72]      ipv6_find_idev+0x102/0x170
[ 2251.758328][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2251.758328][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.758328][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.758328][   T72]      netlink_unicast+0x449/0x710
[ 2251.758328][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.758328][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.758328][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.758328][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.758328][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.758328][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.758328][   T72] 
[ 2251.759839][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2251.759839][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2251.759839][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2251.759839][   T72]      ipv6_find_idev+0x102/0x170
[ 2251.759839][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2251.759839][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2251.759839][   T72]      netlink_rcv_skb+0x130/0x360
[ 2251.759839][   T72]      netlink_unicast+0x449/0x710
[ 2251.759839][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2251.759839][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2251.759839][   T72]      ___sys_sendmsg+0xee/0x170
[ 2251.759839][   T72]      __sys_sendmsg+0xcd/0x170
[ 2251.759839][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.759839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.759839][   T72] 
[ 2251.761501][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2251.761746][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2251.761746][   T72]      dst_init+0x84/0x4a0
[ 2251.761746][   T72]      dst_alloc+0x97/0x150
[ 2251.761746][   T72]      ip6_dst_alloc+0x23/0x90
[ 2251.761746][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2251.761746][   T72]      ip6_pol_route+0x56f/0x840
[ 2251.761746][   T72]      fib6_rule_lookup+0x227/0x600
[ 2251.761746][   T72]      ip6_route_output_flags+0x251/0x460
[ 2251.761746][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2251.761746][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2251.761746][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2251.761746][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2251.761746][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2251.761746][   T72]      __sys_connect+0x217/0x2a0
[ 2251.761746][   T72]      __x64_sys_connect+0x72/0xb0
[ 2251.761746][   T72]      do_syscall_64+0xc6/0x1e0
[ 2251.761746][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2251.761746][   T72] 
[ 2262.004701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2262.005142][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2262.005142][   T72]      netdev_get_by_index+0x5e/0x80
[ 2262.005142][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2262.005142][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2262.005142][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2262.005142][   T72]      ipv6_add_addr+0x411/0x2000
[ 2262.005142][   T72]      inet6_addr_add+0x30e/0xa40
[ 2262.005142][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2262.005142][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.005142][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.005142][   T72]      netlink_unicast+0x449/0x710
[ 2262.005142][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.005142][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.005142][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.005142][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.005142][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.005142][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.005142][   T72] 
[ 2262.007144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2262.007144][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2262.007144][   T72]      ipv6_find_idev+0x102/0x170
[ 2262.007144][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2262.007144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.007144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.007144][   T72]      netlink_unicast+0x449/0x710
[ 2262.007144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.007144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.007144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.007144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.007144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.007144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.007144][   T72] 
[ 2262.008677][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2262.008677][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2262.008677][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2262.008677][   T72]      ipv6_find_idev+0x102/0x170
[ 2262.008677][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2262.008677][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.008677][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.008677][   T72]      netlink_unicast+0x449/0x710
[ 2262.008677][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.008677][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.008677][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.008677][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.008677][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.008677][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.008677][   T72] 
[ 2262.010417][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2262.010691][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2262.010691][   T72]      netdev_get_by_index+0x5e/0x80
[ 2262.010691][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2262.010691][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2262.010691][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2262.010691][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2262.010691][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2262.010691][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2262.010691][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2262.010691][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2262.010691][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2262.010691][   T72]      vfs_write+0x9e5/0x10a0
[ 2262.010691][   T72]      ksys_write+0xf5/0x1e0
[ 2262.010691][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.010691][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.010691][   T72] 
[ 2262.012516][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2262.012516][   T72]      netdev_get_by_index+0x5e/0x80
[ 2262.012516][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2262.012516][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2262.012516][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2262.012516][   T72]      ipv6_add_addr+0x411/0x2000
[ 2262.012516][   T72]      inet6_addr_add+0x30e/0xa40
[ 2262.012516][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2262.012516][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.012516][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.012516][   T72]      netlink_unicast+0x449/0x710
[ 2262.012516][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.012516][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.012516][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.012516][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.012516][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.012516][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.012516][   T72] 
[ 2262.014480][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2262.014480][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2262.014480][   T72]      ipv6_find_idev+0x102/0x170
[ 2262.014480][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2262.014480][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.014480][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.014480][   T72]      netlink_unicast+0x449/0x710
[ 2262.014480][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.014480][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.014480][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.014480][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.014480][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.014480][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.014480][   T72] 
[ 2262.015988][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2262.015988][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2262.015988][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2262.015988][   T72]      ipv6_find_idev+0x102/0x170
[ 2262.015988][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2262.015988][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2262.015988][   T72]      netlink_rcv_skb+0x130/0x360
[ 2262.015988][   T72]      netlink_unicast+0x449/0x710
[ 2262.015988][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2262.015988][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2262.015988][   T72]      ___sys_sendmsg+0xee/0x170
[ 2262.015988][   T72]      __sys_sendmsg+0xcd/0x170
[ 2262.015988][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.015988][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.015988][   T72] 
[ 2262.017647][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2262.017891][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2262.017891][   T72]      dst_init+0x84/0x4a0
[ 2262.017891][   T72]      dst_alloc+0x97/0x150
[ 2262.017891][   T72]      ip6_dst_alloc+0x23/0x90
[ 2262.017891][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2262.017891][   T72]      ip6_pol_route+0x56f/0x840
[ 2262.017891][   T72]      fib6_rule_lookup+0x227/0x600
[ 2262.017891][   T72]      ip6_route_output_flags+0x251/0x460
[ 2262.017891][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2262.017891][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2262.017891][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2262.017891][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2262.017891][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2262.017891][   T72]      __sys_connect+0x217/0x2a0
[ 2262.017891][   T72]      __x64_sys_connect+0x72/0xb0
[ 2262.017891][   T72]      do_syscall_64+0xc6/0x1e0
[ 2262.017891][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2262.017891][   T72] 
[ 2272.164638][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2272.165071][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2272.165071][   T72]      netdev_get_by_index+0x5e/0x80
[ 2272.165071][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2272.165071][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2272.165071][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2272.165071][   T72]      ipv6_add_addr+0x411/0x2000
[ 2272.165071][   T72]      inet6_addr_add+0x30e/0xa40
[ 2272.165071][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2272.165071][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.165071][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.165071][   T72]      netlink_unicast+0x449/0x710
[ 2272.165071][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.165071][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.165071][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.165071][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.165071][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.165071][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.165071][   T72] 
[ 2272.167059][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2272.167059][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2272.167059][   T72]      ipv6_find_idev+0x102/0x170
[ 2272.167059][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2272.167059][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.167059][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.167059][   T72]      netlink_unicast+0x449/0x710
[ 2272.167059][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.167059][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.167059][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.167059][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.167059][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.167059][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.167059][   T72] 
[ 2272.168582][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2272.168582][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2272.168582][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2272.168582][   T72]      ipv6_find_idev+0x102/0x170
[ 2272.168582][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2272.168582][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.168582][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.168582][   T72]      netlink_unicast+0x449/0x710
[ 2272.168582][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.168582][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.168582][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.168582][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.168582][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.168582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.168582][   T72] 
[ 2272.170271][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2272.170537][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2272.170537][   T72]      netdev_get_by_index+0x5e/0x80
[ 2272.170537][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2272.170537][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2272.170537][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2272.170537][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2272.170537][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2272.170537][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2272.170537][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2272.170537][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2272.170537][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2272.170537][   T72]      vfs_write+0x9e5/0x10a0
[ 2272.170537][   T72]      ksys_write+0xf5/0x1e0
[ 2272.170537][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.170537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.170537][   T72] 
[ 2272.172469][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2272.172469][   T72]      netdev_get_by_index+0x5e/0x80
[ 2272.172469][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2272.172469][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2272.172469][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2272.172469][   T72]      ipv6_add_addr+0x411/0x2000
[ 2272.172469][   T72]      inet6_addr_add+0x30e/0xa40
[ 2272.172469][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2272.172469][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.172469][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.172469][   T72]      netlink_unicast+0x449/0x710
[ 2272.172469][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.172469][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.172469][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.172469][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.172469][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.172469][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.172469][   T72] 
[ 2272.174448][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2272.174448][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2272.174448][   T72]      ipv6_find_idev+0x102/0x170
[ 2272.174448][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2272.174448][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.174448][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.174448][   T72]      netlink_unicast+0x449/0x710
[ 2272.174448][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.174448][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.174448][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.174448][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.174448][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.174448][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.174448][   T72] 
[ 2272.175976][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2272.175976][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2272.175976][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2272.175976][   T72]      ipv6_find_idev+0x102/0x170
[ 2272.175976][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2272.175976][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2272.175976][   T72]      netlink_rcv_skb+0x130/0x360
[ 2272.175976][   T72]      netlink_unicast+0x449/0x710
[ 2272.175976][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2272.175976][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2272.175976][   T72]      ___sys_sendmsg+0xee/0x170
[ 2272.175976][   T72]      __sys_sendmsg+0xcd/0x170
[ 2272.175976][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.175976][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.175976][   T72] 
[ 2272.177644][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2272.177889][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2272.177889][   T72]      dst_init+0x84/0x4a0
[ 2272.177889][   T72]      dst_alloc+0x97/0x150
[ 2272.177889][   T72]      ip6_dst_alloc+0x23/0x90
[ 2272.177889][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2272.177889][   T72]      ip6_pol_route+0x56f/0x840
[ 2272.177889][   T72]      fib6_rule_lookup+0x227/0x600
[ 2272.177889][   T72]      ip6_route_output_flags+0x251/0x460
[ 2272.177889][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2272.177889][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2272.177889][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2272.177889][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2272.177889][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2272.177889][   T72]      __sys_connect+0x217/0x2a0
[ 2272.177889][   T72]      __x64_sys_connect+0x72/0xb0
[ 2272.177889][   T72]      do_syscall_64+0xc6/0x1e0
[ 2272.177889][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2272.177889][   T72] 
[ 2282.428721][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2282.429176][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2282.429176][   T72]      netdev_get_by_index+0x5e/0x80
[ 2282.429176][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2282.429176][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2282.429176][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2282.429176][   T72]      ipv6_add_addr+0x411/0x2000
[ 2282.429176][   T72]      inet6_addr_add+0x30e/0xa40
[ 2282.429176][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2282.429176][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.429176][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.429176][   T72]      netlink_unicast+0x449/0x710
[ 2282.429176][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.429176][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.429176][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.429176][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.429176][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.429176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.429176][   T72] 
[ 2282.431229][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2282.431229][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2282.431229][   T72]      ipv6_find_idev+0x102/0x170
[ 2282.431229][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2282.431229][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.431229][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.431229][   T72]      netlink_unicast+0x449/0x710
[ 2282.431229][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.431229][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.431229][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.431229][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.431229][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.431229][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.431229][   T72] 
[ 2282.432776][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2282.432776][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2282.432776][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2282.432776][   T72]      ipv6_find_idev+0x102/0x170
[ 2282.432776][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2282.432776][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.432776][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.432776][   T72]      netlink_unicast+0x449/0x710
[ 2282.432776][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.432776][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.432776][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.432776][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.432776][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.432776][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.432776][   T72] 
[ 2282.434485][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2282.434770][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2282.434770][   T72]      netdev_get_by_index+0x5e/0x80
[ 2282.434770][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2282.434770][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2282.434770][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2282.434770][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2282.434770][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2282.434770][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2282.434770][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2282.434770][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2282.434770][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2282.434770][   T72]      vfs_write+0x9e5/0x10a0
[ 2282.434770][   T72]      ksys_write+0xf5/0x1e0
[ 2282.434770][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.434770][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.434770][   T72] 
[ 2282.436639][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2282.436639][   T72]      netdev_get_by_index+0x5e/0x80
[ 2282.436639][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2282.436639][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2282.436639][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2282.436639][   T72]      ipv6_add_addr+0x411/0x2000
[ 2282.436639][   T72]      inet6_addr_add+0x30e/0xa40
[ 2282.436639][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2282.436639][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.436639][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.436639][   T72]      netlink_unicast+0x449/0x710
[ 2282.436639][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.436639][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.436639][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.436639][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.436639][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.436639][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.436639][   T72] 
[ 2282.438634][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2282.438634][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2282.438634][   T72]      ipv6_find_idev+0x102/0x170
[ 2282.438634][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2282.438634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.438634][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.438634][   T72]      netlink_unicast+0x449/0x710
[ 2282.438634][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.438634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.438634][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.438634][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.438634][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.438634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.438634][   T72] 
[ 2282.440184][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2282.440184][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2282.440184][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2282.440184][   T72]      ipv6_find_idev+0x102/0x170
[ 2282.440184][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2282.440184][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2282.440184][   T72]      netlink_rcv_skb+0x130/0x360
[ 2282.440184][   T72]      netlink_unicast+0x449/0x710
[ 2282.440184][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2282.440184][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2282.440184][   T72]      ___sys_sendmsg+0xee/0x170
[ 2282.440184][   T72]      __sys_sendmsg+0xcd/0x170
[ 2282.440184][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.440184][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.440184][   T72] 
[ 2282.441888][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2282.442139][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2282.442139][   T72]      dst_init+0x84/0x4a0
[ 2282.442139][   T72]      dst_alloc+0x97/0x150
[ 2282.442139][   T72]      ip6_dst_alloc+0x23/0x90
[ 2282.442139][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2282.442139][   T72]      ip6_pol_route+0x56f/0x840
[ 2282.442139][   T72]      fib6_rule_lookup+0x227/0x600
[ 2282.442139][   T72]      ip6_route_output_flags+0x251/0x460
[ 2282.442139][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2282.442139][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2282.442139][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2282.442139][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2282.442139][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2282.442139][   T72]      __sys_connect+0x217/0x2a0
[ 2282.442139][   T72]      __x64_sys_connect+0x72/0xb0
[ 2282.442139][   T72]      do_syscall_64+0xc6/0x1e0
[ 2282.442139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2282.442139][   T72] 
[ 2292.836729][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2292.837183][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2292.837183][   T72]      netdev_get_by_index+0x5e/0x80
[ 2292.837183][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2292.837183][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2292.837183][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2292.837183][   T72]      ipv6_add_addr+0x411/0x2000
[ 2292.837183][   T72]      inet6_addr_add+0x30e/0xa40
[ 2292.837183][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2292.837183][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.837183][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.837183][   T72]      netlink_unicast+0x449/0x710
[ 2292.837183][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.837183][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.837183][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.837183][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.837183][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.837183][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.837183][   T72] 
[ 2292.839161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2292.839161][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2292.839161][   T72]      ipv6_find_idev+0x102/0x170
[ 2292.839161][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2292.839161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.839161][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.839161][   T72]      netlink_unicast+0x449/0x710
[ 2292.839161][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.839161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.839161][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.839161][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.839161][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.839161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.839161][   T72] 
[ 2292.840691][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2292.840691][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2292.840691][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2292.840691][   T72]      ipv6_find_idev+0x102/0x170
[ 2292.840691][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2292.840691][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.840691][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.840691][   T72]      netlink_unicast+0x449/0x710
[ 2292.840691][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.840691][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.840691][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.840691][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.840691][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.840691][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.840691][   T72] 
[ 2292.842375][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2292.842661][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2292.842661][   T72]      netdev_get_by_index+0x5e/0x80
[ 2292.842661][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2292.842661][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2292.842661][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2292.842661][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2292.842661][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2292.842661][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2292.842661][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2292.842661][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2292.842661][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2292.842661][   T72]      vfs_write+0x9e5/0x10a0
[ 2292.842661][   T72]      ksys_write+0xf5/0x1e0
[ 2292.842661][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.842661][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.842661][   T72] 
[ 2292.844496][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2292.844496][   T72]      netdev_get_by_index+0x5e/0x80
[ 2292.844496][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2292.844496][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2292.844496][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2292.844496][   T72]      ipv6_add_addr+0x411/0x2000
[ 2292.844496][   T72]      inet6_addr_add+0x30e/0xa40
[ 2292.844496][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2292.844496][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.844496][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.844496][   T72]      netlink_unicast+0x449/0x710
[ 2292.844496][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.844496][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.844496][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.844496][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.844496][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.844496][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.844496][   T72] 
[ 2292.846476][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2292.846476][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2292.846476][   T72]      ipv6_find_idev+0x102/0x170
[ 2292.846476][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2292.846476][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.846476][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.846476][   T72]      netlink_unicast+0x449/0x710
[ 2292.846476][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.846476][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.846476][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.846476][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.846476][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.846476][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.846476][   T72] 
[ 2292.848016][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2292.848016][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2292.848016][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2292.848016][   T72]      ipv6_find_idev+0x102/0x170
[ 2292.848016][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2292.848016][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2292.848016][   T72]      netlink_rcv_skb+0x130/0x360
[ 2292.848016][   T72]      netlink_unicast+0x449/0x710
[ 2292.848016][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2292.848016][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2292.848016][   T72]      ___sys_sendmsg+0xee/0x170
[ 2292.848016][   T72]      __sys_sendmsg+0xcd/0x170
[ 2292.848016][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.848016][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.848016][   T72] 
[ 2292.849702][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2292.849936][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2292.849936][   T72]      dst_init+0x84/0x4a0
[ 2292.849936][   T72]      dst_alloc+0x97/0x150
[ 2292.849936][   T72]      ip6_dst_alloc+0x23/0x90
[ 2292.849936][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2292.849936][   T72]      ip6_pol_route+0x56f/0x840
[ 2292.849936][   T72]      fib6_rule_lookup+0x227/0x600
[ 2292.849936][   T72]      ip6_route_output_flags+0x251/0x460
[ 2292.849936][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2292.849936][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2292.849936][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2292.849936][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2292.849936][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2292.849936][   T72]      __sys_connect+0x217/0x2a0
[ 2292.849936][   T72]      __x64_sys_connect+0x72/0xb0
[ 2292.849936][   T72]      do_syscall_64+0xc6/0x1e0
[ 2292.849936][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2292.849936][   T72] 
[ 2302.980631][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2302.981065][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2302.981065][   T72]      netdev_get_by_index+0x5e/0x80
[ 2302.981065][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2302.981065][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2302.981065][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2302.981065][   T72]      ipv6_add_addr+0x411/0x2000
[ 2302.981065][   T72]      inet6_addr_add+0x30e/0xa40
[ 2302.981065][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2302.981065][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.981065][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.981065][   T72]      netlink_unicast+0x449/0x710
[ 2302.981065][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.981065][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.981065][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.981065][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.981065][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.981065][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.981065][   T72] 
[ 2302.983074][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2302.983074][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2302.983074][   T72]      ipv6_find_idev+0x102/0x170
[ 2302.983074][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2302.983074][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.983074][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.983074][   T72]      netlink_unicast+0x449/0x710
[ 2302.983074][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.983074][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.983074][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.983074][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.983074][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.983074][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.983074][   T72] 
[ 2302.984607][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2302.984607][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2302.984607][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2302.984607][   T72]      ipv6_find_idev+0x102/0x170
[ 2302.984607][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2302.984607][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.984607][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.984607][   T72]      netlink_unicast+0x449/0x710
[ 2302.984607][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.984607][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.984607][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.984607][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.984607][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.984607][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.984607][   T72] 
[ 2302.986273][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2302.986550][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2302.986550][   T72]      netdev_get_by_index+0x5e/0x80
[ 2302.986550][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2302.986550][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2302.986550][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2302.986550][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2302.986550][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2302.986550][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2302.986550][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2302.986550][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2302.986550][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2302.986550][   T72]      vfs_write+0x9e5/0x10a0
[ 2302.986550][   T72]      ksys_write+0xf5/0x1e0
[ 2302.986550][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.986550][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.986550][   T72] 
[ 2302.988384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2302.988384][   T72]      netdev_get_by_index+0x5e/0x80
[ 2302.988384][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2302.988384][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2302.988384][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2302.988384][   T72]      ipv6_add_addr+0x411/0x2000
[ 2302.988384][   T72]      inet6_addr_add+0x30e/0xa40
[ 2302.988384][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2302.988384][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.988384][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.988384][   T72]      netlink_unicast+0x449/0x710
[ 2302.988384][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.988384][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.988384][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.988384][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.988384][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.988384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.988384][   T72] 
[ 2302.990348][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2302.990348][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2302.990348][   T72]      ipv6_find_idev+0x102/0x170
[ 2302.990348][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2302.990348][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.990348][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.990348][   T72]      netlink_unicast+0x449/0x710
[ 2302.990348][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.990348][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.990348][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.990348][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.990348][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.990348][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.990348][   T72] 
[ 2302.991858][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2302.991858][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2302.991858][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2302.991858][   T72]      ipv6_find_idev+0x102/0x170
[ 2302.991858][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2302.991858][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2302.991858][   T72]      netlink_rcv_skb+0x130/0x360
[ 2302.991858][   T72]      netlink_unicast+0x449/0x710
[ 2302.991858][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2302.991858][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2302.991858][   T72]      ___sys_sendmsg+0xee/0x170
[ 2302.991858][   T72]      __sys_sendmsg+0xcd/0x170
[ 2302.991858][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.991858][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.991858][   T72] 
[ 2302.993520][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2302.993769][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2302.993769][   T72]      dst_init+0x84/0x4a0
[ 2302.993769][   T72]      dst_alloc+0x97/0x150
[ 2302.993769][   T72]      ip6_dst_alloc+0x23/0x90
[ 2302.993769][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2302.993769][   T72]      ip6_pol_route+0x56f/0x840
[ 2302.993769][   T72]      fib6_rule_lookup+0x227/0x600
[ 2302.993769][   T72]      ip6_route_output_flags+0x251/0x460
[ 2302.993769][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2302.993769][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2302.993769][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2302.993769][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2302.993769][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2302.993769][   T72]      __sys_connect+0x217/0x2a0
[ 2302.993769][   T72]      __x64_sys_connect+0x72/0xb0
[ 2302.993769][   T72]      do_syscall_64+0xc6/0x1e0
[ 2302.993769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2302.993769][   T72] 
[ 2313.236725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2313.237171][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2313.237171][   T72]      netdev_get_by_index+0x5e/0x80
[ 2313.237171][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2313.237171][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2313.237171][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2313.237171][   T72]      ipv6_add_addr+0x411/0x2000
[ 2313.237171][   T72]      inet6_addr_add+0x30e/0xa40
[ 2313.237171][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2313.237171][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.237171][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.237171][   T72]      netlink_unicast+0x449/0x710
[ 2313.237171][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.237171][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.237171][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.237171][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.237171][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.237171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.237171][   T72] 
[ 2313.239204][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2313.239204][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2313.239204][   T72]      ipv6_find_idev+0x102/0x170
[ 2313.239204][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2313.239204][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.239204][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.239204][   T72]      netlink_unicast+0x449/0x710
[ 2313.239204][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.239204][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.239204][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.239204][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.239204][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.239204][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.239204][   T72] 
[ 2313.240750][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2313.240750][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2313.240750][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2313.240750][   T72]      ipv6_find_idev+0x102/0x170
[ 2313.240750][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2313.240750][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.240750][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.240750][   T72]      netlink_unicast+0x449/0x710
[ 2313.240750][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.240750][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.240750][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.240750][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.240750][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.240750][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.240750][   T72] 
[ 2313.242455][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2313.242739][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2313.242739][   T72]      netdev_get_by_index+0x5e/0x80
[ 2313.242739][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2313.242739][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2313.242739][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2313.242739][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2313.242739][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2313.242739][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2313.242739][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2313.242739][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2313.242739][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2313.242739][   T72]      vfs_write+0x9e5/0x10a0
[ 2313.242739][   T72]      ksys_write+0xf5/0x1e0
[ 2313.242739][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.242739][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.242739][   T72] 
[ 2313.244584][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2313.244584][   T72]      netdev_get_by_index+0x5e/0x80
[ 2313.244584][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2313.244584][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2313.244584][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2313.244584][   T72]      ipv6_add_addr+0x411/0x2000
[ 2313.244584][   T72]      inet6_addr_add+0x30e/0xa40
[ 2313.244584][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2313.244584][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.244584][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.244584][   T72]      netlink_unicast+0x449/0x710
[ 2313.244584][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.244584][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.244584][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.244584][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.244584][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.244584][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.244584][   T72] 
[ 2313.246558][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2313.246558][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2313.246558][   T72]      ipv6_find_idev+0x102/0x170
[ 2313.246558][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2313.246558][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.246558][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.246558][   T72]      netlink_unicast+0x449/0x710
[ 2313.246558][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.246558][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.246558][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.246558][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.246558][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.246558][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.246558][   T72] 
[ 2313.248092][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2313.248092][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2313.248092][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2313.248092][   T72]      ipv6_find_idev+0x102/0x170
[ 2313.248092][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2313.248092][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2313.248092][   T72]      netlink_rcv_skb+0x130/0x360
[ 2313.248092][   T72]      netlink_unicast+0x449/0x710
[ 2313.248092][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2313.248092][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2313.248092][   T72]      ___sys_sendmsg+0xee/0x170
[ 2313.248092][   T72]      __sys_sendmsg+0xcd/0x170
[ 2313.248092][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.248092][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.248092][   T72] 
[ 2313.249768][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2313.250007][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2313.250007][   T72]      dst_init+0x84/0x4a0
[ 2313.250007][   T72]      dst_alloc+0x97/0x150
[ 2313.250007][   T72]      ip6_dst_alloc+0x23/0x90
[ 2313.250007][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2313.250007][   T72]      ip6_pol_route+0x56f/0x840
[ 2313.250007][   T72]      fib6_rule_lookup+0x227/0x600
[ 2313.250007][   T72]      ip6_route_output_flags+0x251/0x460
[ 2313.250007][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2313.250007][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2313.250007][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2313.250007][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2313.250007][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2313.250007][   T72]      __sys_connect+0x217/0x2a0
[ 2313.250007][   T72]      __x64_sys_connect+0x72/0xb0
[ 2313.250007][   T72]      do_syscall_64+0xc6/0x1e0
[ 2313.250007][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2313.250007][   T72] 
[ 2323.492712][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2323.493187][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2323.493187][   T72]      netdev_get_by_index+0x5e/0x80
[ 2323.493187][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2323.493187][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2323.493187][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2323.493187][   T72]      ipv6_add_addr+0x411/0x2000
[ 2323.493187][   T72]      inet6_addr_add+0x30e/0xa40
[ 2323.493187][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2323.493187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.493187][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.493187][   T72]      netlink_unicast+0x449/0x710
[ 2323.493187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.493187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.493187][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.493187][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.493187][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.493187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.493187][   T72] 
[ 2323.495200][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2323.495200][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2323.495200][   T72]      ipv6_find_idev+0x102/0x170
[ 2323.495200][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2323.495200][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.495200][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.495200][   T72]      netlink_unicast+0x449/0x710
[ 2323.495200][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.495200][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.495200][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.495200][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.495200][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.495200][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.495200][   T72] 
[ 2323.496730][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2323.496730][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2323.496730][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2323.496730][   T72]      ipv6_find_idev+0x102/0x170
[ 2323.496730][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2323.496730][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.496730][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.496730][   T72]      netlink_unicast+0x449/0x710
[ 2323.496730][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.496730][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.496730][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.496730][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.496730][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.496730][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.496730][   T72] 
[ 2323.498385][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2323.498674][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2323.498674][   T72]      netdev_get_by_index+0x5e/0x80
[ 2323.498674][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2323.498674][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2323.498674][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2323.498674][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2323.498674][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2323.498674][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2323.498674][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2323.498674][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2323.498674][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2323.498674][   T72]      vfs_write+0x9e5/0x10a0
[ 2323.498674][   T72]      ksys_write+0xf5/0x1e0
[ 2323.498674][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.498674][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.498674][   T72] 
[ 2323.500511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2323.500511][   T72]      netdev_get_by_index+0x5e/0x80
[ 2323.500511][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2323.500511][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2323.500511][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2323.500511][   T72]      ipv6_add_addr+0x411/0x2000
[ 2323.500511][   T72]      inet6_addr_add+0x30e/0xa40
[ 2323.500511][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2323.500511][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.500511][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.500511][   T72]      netlink_unicast+0x449/0x710
[ 2323.500511][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.500511][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.500511][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.500511][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.500511][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.500511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.500511][   T72] 
[ 2323.502484][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2323.502484][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2323.502484][   T72]      ipv6_find_idev+0x102/0x170
[ 2323.502484][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2323.502484][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.502484][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.502484][   T72]      netlink_unicast+0x449/0x710
[ 2323.502484][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.502484][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.502484][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.502484][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.502484][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.502484][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.502484][   T72] 
[ 2323.503999][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2323.503999][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2323.503999][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2323.503999][   T72]      ipv6_find_idev+0x102/0x170
[ 2323.503999][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2323.503999][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2323.503999][   T72]      netlink_rcv_skb+0x130/0x360
[ 2323.503999][   T72]      netlink_unicast+0x449/0x710
[ 2323.503999][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2323.503999][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2323.503999][   T72]      ___sys_sendmsg+0xee/0x170
[ 2323.503999][   T72]      __sys_sendmsg+0xcd/0x170
[ 2323.503999][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.503999][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.503999][   T72] 
[ 2323.505658][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2323.505901][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2323.505901][   T72]      dst_init+0x84/0x4a0
[ 2323.505901][   T72]      dst_alloc+0x97/0x150
[ 2323.505901][   T72]      ip6_dst_alloc+0x23/0x90
[ 2323.505901][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2323.505901][   T72]      ip6_pol_route+0x56f/0x840
[ 2323.505901][   T72]      fib6_rule_lookup+0x227/0x600
[ 2323.505901][   T72]      ip6_route_output_flags+0x251/0x460
[ 2323.505901][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2323.505901][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2323.505901][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2323.505901][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2323.505901][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2323.505901][   T72]      __sys_connect+0x217/0x2a0
[ 2323.505901][   T72]      __x64_sys_connect+0x72/0xb0
[ 2323.505901][   T72]      do_syscall_64+0xc6/0x1e0
[ 2323.505901][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2323.505901][   T72] 
[ 2333.748725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2333.749183][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2333.749183][   T72]      netdev_get_by_index+0x5e/0x80
[ 2333.749183][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2333.749183][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2333.749183][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2333.749183][   T72]      ipv6_add_addr+0x411/0x2000
[ 2333.749183][   T72]      inet6_addr_add+0x30e/0xa40
[ 2333.749183][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2333.749183][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.749183][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.749183][   T72]      netlink_unicast+0x449/0x710
[ 2333.749183][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.749183][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.749183][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.749183][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.749183][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.749183][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.749183][   T72] 
[ 2333.751193][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2333.751193][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2333.751193][   T72]      ipv6_find_idev+0x102/0x170
[ 2333.751193][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2333.751193][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.751193][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.751193][   T72]      netlink_unicast+0x449/0x710
[ 2333.751193][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.751193][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.751193][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.751193][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.751193][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.751193][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.751193][   T72] 
[ 2333.752719][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2333.752719][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2333.752719][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2333.752719][   T72]      ipv6_find_idev+0x102/0x170
[ 2333.752719][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2333.752719][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.752719][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.752719][   T72]      netlink_unicast+0x449/0x710
[ 2333.752719][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.752719][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.752719][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.752719][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.752719][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.752719][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.752719][   T72] 
[ 2333.754391][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2333.754665][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2333.754665][   T72]      netdev_get_by_index+0x5e/0x80
[ 2333.754665][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2333.754665][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2333.754665][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2333.754665][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2333.754665][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2333.754665][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2333.754665][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2333.754665][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2333.754665][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2333.754665][   T72]      vfs_write+0x9e5/0x10a0
[ 2333.754665][   T72]      ksys_write+0xf5/0x1e0
[ 2333.754665][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.754665][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.754665][   T72] 
[ 2333.756499][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2333.756499][   T72]      netdev_get_by_index+0x5e/0x80
[ 2333.756499][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2333.756499][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2333.756499][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2333.756499][   T72]      ipv6_add_addr+0x411/0x2000
[ 2333.756499][   T72]      inet6_addr_add+0x30e/0xa40
[ 2333.756499][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2333.756499][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.756499][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.756499][   T72]      netlink_unicast+0x449/0x710
[ 2333.756499][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.756499][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.756499][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.756499][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.756499][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.756499][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.756499][   T72] 
[ 2333.758465][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2333.758465][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2333.758465][   T72]      ipv6_find_idev+0x102/0x170
[ 2333.758465][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2333.758465][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.758465][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.758465][   T72]      netlink_unicast+0x449/0x710
[ 2333.758465][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.758465][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.758465][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.758465][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.758465][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.758465][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.758465][   T72] 
[ 2333.759996][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2333.759996][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2333.759996][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2333.759996][   T72]      ipv6_find_idev+0x102/0x170
[ 2333.759996][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2333.759996][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2333.759996][   T72]      netlink_rcv_skb+0x130/0x360
[ 2333.759996][   T72]      netlink_unicast+0x449/0x710
[ 2333.759996][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2333.759996][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2333.759996][   T72]      ___sys_sendmsg+0xee/0x170
[ 2333.759996][   T72]      __sys_sendmsg+0xcd/0x170
[ 2333.759996][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.759996][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.759996][   T72] 
[ 2333.761652][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2333.761891][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2333.761891][   T72]      dst_init+0x84/0x4a0
[ 2333.761891][   T72]      dst_alloc+0x97/0x150
[ 2333.761891][   T72]      ip6_dst_alloc+0x23/0x90
[ 2333.761891][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2333.761891][   T72]      ip6_pol_route+0x56f/0x840
[ 2333.761891][   T72]      fib6_rule_lookup+0x227/0x600
[ 2333.761891][   T72]      ip6_route_output_flags+0x251/0x460
[ 2333.761891][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2333.761891][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2333.761891][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2333.761891][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2333.761891][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2333.761891][   T72]      __sys_connect+0x217/0x2a0
[ 2333.761891][   T72]      __x64_sys_connect+0x72/0xb0
[ 2333.761891][   T72]      do_syscall_64+0xc6/0x1e0
[ 2333.761891][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2333.761891][   T72] 
[ 2344.004629][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2344.005087][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2344.005087][   T72]      netdev_get_by_index+0x5e/0x80
[ 2344.005087][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2344.005087][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2344.005087][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2344.005087][   T72]      ipv6_add_addr+0x411/0x2000
[ 2344.005087][   T72]      inet6_addr_add+0x30e/0xa40
[ 2344.005087][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2344.005087][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.005087][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.005087][   T72]      netlink_unicast+0x449/0x710
[ 2344.005087][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.005087][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.005087][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.005087][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.005087][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.005087][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.005087][   T72] 
[ 2344.007073][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2344.007073][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2344.007073][   T72]      ipv6_find_idev+0x102/0x170
[ 2344.007073][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2344.007073][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.007073][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.007073][   T72]      netlink_unicast+0x449/0x710
[ 2344.007073][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.007073][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.007073][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.007073][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.007073][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.007073][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.007073][   T72] 
[ 2344.008599][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2344.008599][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2344.008599][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2344.008599][   T72]      ipv6_find_idev+0x102/0x170
[ 2344.008599][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2344.008599][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.008599][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.008599][   T72]      netlink_unicast+0x449/0x710
[ 2344.008599][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.008599][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.008599][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.008599][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.008599][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.008599][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.008599][   T72] 
[ 2344.010332][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2344.010601][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2344.010601][   T72]      netdev_get_by_index+0x5e/0x80
[ 2344.010601][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2344.010601][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2344.010601][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2344.010601][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2344.010601][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2344.010601][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2344.010601][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2344.010601][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2344.010601][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2344.010601][   T72]      vfs_write+0x9e5/0x10a0
[ 2344.010601][   T72]      ksys_write+0xf5/0x1e0
[ 2344.010601][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.010601][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.010601][   T72] 
[ 2344.012445][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2344.012445][   T72]      netdev_get_by_index+0x5e/0x80
[ 2344.012445][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2344.012445][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2344.012445][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2344.012445][   T72]      ipv6_add_addr+0x411/0x2000
[ 2344.012445][   T72]      inet6_addr_add+0x30e/0xa40
[ 2344.012445][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2344.012445][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.012445][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.012445][   T72]      netlink_unicast+0x449/0x710
[ 2344.012445][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.012445][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.012445][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.012445][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.012445][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.012445][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.012445][   T72] 
[ 2344.014422][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2344.014422][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2344.014422][   T72]      ipv6_find_idev+0x102/0x170
[ 2344.014422][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2344.014422][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.014422][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.014422][   T72]      netlink_unicast+0x449/0x710
[ 2344.014422][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.014422][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.014422][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.014422][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.014422][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.014422][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.014422][   T72] 
[ 2344.015952][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2344.015952][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2344.015952][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2344.015952][   T72]      ipv6_find_idev+0x102/0x170
[ 2344.015952][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2344.015952][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2344.015952][   T72]      netlink_rcv_skb+0x130/0x360
[ 2344.015952][   T72]      netlink_unicast+0x449/0x710
[ 2344.015952][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2344.015952][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2344.015952][   T72]      ___sys_sendmsg+0xee/0x170
[ 2344.015952][   T72]      __sys_sendmsg+0xcd/0x170
[ 2344.015952][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.015952][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.015952][   T72] 
[ 2344.017627][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2344.017862][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2344.017862][   T72]      dst_init+0x84/0x4a0
[ 2344.017862][   T72]      dst_alloc+0x97/0x150
[ 2344.017862][   T72]      ip6_dst_alloc+0x23/0x90
[ 2344.017862][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2344.017862][   T72]      ip6_pol_route+0x56f/0x840
[ 2344.017862][   T72]      fib6_rule_lookup+0x227/0x600
[ 2344.017862][   T72]      ip6_route_output_flags+0x251/0x460
[ 2344.017862][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2344.017862][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2344.017862][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2344.017862][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2344.017862][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2344.017862][   T72]      __sys_connect+0x217/0x2a0
[ 2344.017862][   T72]      __x64_sys_connect+0x72/0xb0
[ 2344.017862][   T72]      do_syscall_64+0xc6/0x1e0
[ 2344.017862][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2344.017862][   T72] 
[ 2354.260645][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2354.261100][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2354.261100][   T72]      netdev_get_by_index+0x5e/0x80
[ 2354.261100][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2354.261100][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2354.261100][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2354.261100][   T72]      ipv6_add_addr+0x411/0x2000
[ 2354.261100][   T72]      inet6_addr_add+0x30e/0xa40
[ 2354.261100][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2354.261100][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.261100][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.261100][   T72]      netlink_unicast+0x449/0x710
[ 2354.261100][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.261100][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.261100][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.261100][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.261100][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.261100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.261100][   T72] 
[ 2354.263095][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2354.263095][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2354.263095][   T72]      ipv6_find_idev+0x102/0x170
[ 2354.263095][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2354.263095][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.263095][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.263095][   T72]      netlink_unicast+0x449/0x710
[ 2354.263095][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.263095][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.263095][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.263095][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.263095][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.263095][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.263095][   T72] 
[ 2354.264628][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2354.264628][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2354.264628][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2354.264628][   T72]      ipv6_find_idev+0x102/0x170
[ 2354.264628][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2354.264628][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.264628][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.264628][   T72]      netlink_unicast+0x449/0x710
[ 2354.264628][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.264628][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.264628][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.264628][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.264628][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.264628][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.264628][   T72] 
[ 2354.266312][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2354.266578][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2354.266578][   T72]      netdev_get_by_index+0x5e/0x80
[ 2354.266578][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2354.266578][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2354.266578][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2354.266578][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2354.266578][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2354.266578][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2354.266578][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2354.266578][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2354.266578][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2354.266578][   T72]      vfs_write+0x9e5/0x10a0
[ 2354.266578][   T72]      ksys_write+0xf5/0x1e0
[ 2354.266578][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.266578][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.266578][   T72] 
[ 2354.268419][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2354.268419][   T72]      netdev_get_by_index+0x5e/0x80
[ 2354.268419][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2354.268419][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2354.268419][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2354.268419][   T72]      ipv6_add_addr+0x411/0x2000
[ 2354.268419][   T72]      inet6_addr_add+0x30e/0xa40
[ 2354.268419][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2354.268419][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.268419][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.268419][   T72]      netlink_unicast+0x449/0x710
[ 2354.268419][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.268419][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.268419][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.268419][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.268419][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.268419][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.268419][   T72] 
[ 2354.270821][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2354.270821][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2354.270821][   T72]      ipv6_find_idev+0x102/0x170
[ 2354.270821][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2354.270821][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.270821][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.270821][   T72]      netlink_unicast+0x449/0x710
[ 2354.270821][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.270821][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.270821][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.270821][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.270821][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.270821][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.270821][   T72] 
[ 2354.272351][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2354.272351][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2354.272351][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2354.272351][   T72]      ipv6_find_idev+0x102/0x170
[ 2354.272351][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2354.272351][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2354.272351][   T72]      netlink_rcv_skb+0x130/0x360
[ 2354.272351][   T72]      netlink_unicast+0x449/0x710
[ 2354.272351][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2354.272351][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2354.272351][   T72]      ___sys_sendmsg+0xee/0x170
[ 2354.272351][   T72]      __sys_sendmsg+0xcd/0x170
[ 2354.272351][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.272351][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.272351][   T72] 
[ 2354.274037][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2354.274275][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2354.274275][   T72]      dst_init+0x84/0x4a0
[ 2354.274275][   T72]      dst_alloc+0x97/0x150
[ 2354.274275][   T72]      ip6_dst_alloc+0x23/0x90
[ 2354.274275][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2354.274275][   T72]      ip6_pol_route+0x56f/0x840
[ 2354.274275][   T72]      fib6_rule_lookup+0x227/0x600
[ 2354.274275][   T72]      ip6_route_output_flags+0x251/0x460
[ 2354.274275][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2354.274275][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2354.274275][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2354.274275][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2354.274275][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2354.274275][   T72]      __sys_connect+0x217/0x2a0
[ 2354.274275][   T72]      __x64_sys_connect+0x72/0xb0
[ 2354.274275][   T72]      do_syscall_64+0xc6/0x1e0
[ 2354.274275][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2354.274275][   T72] 
[ 2364.516700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2364.517144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2364.517144][   T72]      netdev_get_by_index+0x5e/0x80
[ 2364.517144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2364.517144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2364.517144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2364.517144][   T72]      ipv6_add_addr+0x411/0x2000
[ 2364.517144][   T72]      inet6_addr_add+0x30e/0xa40
[ 2364.517144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2364.517144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.517144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.517144][   T72]      netlink_unicast+0x449/0x710
[ 2364.517144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.517144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.517144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.517144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.517144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.517144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.517144][   T72] 
[ 2364.519201][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2364.519201][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2364.519201][   T72]      ipv6_find_idev+0x102/0x170
[ 2364.519201][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2364.519201][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.519201][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.519201][   T72]      netlink_unicast+0x449/0x710
[ 2364.519201][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.519201][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.519201][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.519201][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.519201][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.519201][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.519201][   T72] 
[ 2364.520753][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2364.520753][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2364.520753][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2364.520753][   T72]      ipv6_find_idev+0x102/0x170
[ 2364.520753][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2364.520753][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.520753][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.520753][   T72]      netlink_unicast+0x449/0x710
[ 2364.520753][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.520753][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.520753][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.520753][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.520753][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.520753][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.520753][   T72] 
[ 2364.522423][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2364.522696][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2364.522696][   T72]      netdev_get_by_index+0x5e/0x80
[ 2364.522696][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2364.522696][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2364.522696][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2364.522696][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2364.522696][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2364.522696][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2364.522696][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2364.522696][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2364.522696][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2364.522696][   T72]      vfs_write+0x9e5/0x10a0
[ 2364.522696][   T72]      ksys_write+0xf5/0x1e0
[ 2364.522696][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.522696][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.522696][   T72] 
[ 2364.524540][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2364.524540][   T72]      netdev_get_by_index+0x5e/0x80
[ 2364.524540][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2364.524540][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2364.524540][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2364.524540][   T72]      ipv6_add_addr+0x411/0x2000
[ 2364.524540][   T72]      inet6_addr_add+0x30e/0xa40
[ 2364.524540][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2364.524540][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.524540][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.524540][   T72]      netlink_unicast+0x449/0x710
[ 2364.524540][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.524540][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.524540][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.524540][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.524540][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.524540][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.524540][   T72] 
[ 2364.526509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2364.526509][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2364.526509][   T72]      ipv6_find_idev+0x102/0x170
[ 2364.526509][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2364.526509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.526509][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.526509][   T72]      netlink_unicast+0x449/0x710
[ 2364.526509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.526509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.526509][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.526509][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.526509][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.526509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.526509][   T72] 
[ 2364.528029][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2364.528029][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2364.528029][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2364.528029][   T72]      ipv6_find_idev+0x102/0x170
[ 2364.528029][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2364.528029][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2364.528029][   T72]      netlink_rcv_skb+0x130/0x360
[ 2364.528029][   T72]      netlink_unicast+0x449/0x710
[ 2364.528029][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2364.528029][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2364.528029][   T72]      ___sys_sendmsg+0xee/0x170
[ 2364.528029][   T72]      __sys_sendmsg+0xcd/0x170
[ 2364.528029][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.528029][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.528029][   T72] 
[ 2364.529713][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2364.529953][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2364.529953][   T72]      dst_init+0x84/0x4a0
[ 2364.529953][   T72]      dst_alloc+0x97/0x150
[ 2364.529953][   T72]      ip6_dst_alloc+0x23/0x90
[ 2364.529953][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2364.529953][   T72]      ip6_pol_route+0x56f/0x840
[ 2364.529953][   T72]      fib6_rule_lookup+0x227/0x600
[ 2364.529953][   T72]      ip6_route_output_flags+0x251/0x460
[ 2364.529953][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2364.529953][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2364.529953][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2364.529953][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2364.529953][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2364.529953][   T72]      __sys_connect+0x217/0x2a0
[ 2364.529953][   T72]      __x64_sys_connect+0x72/0xb0
[ 2364.529953][   T72]      do_syscall_64+0xc6/0x1e0
[ 2364.529953][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2364.529953][   T72] 
[ 2374.772638][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2374.773102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2374.773102][   T72]      netdev_get_by_index+0x5e/0x80
[ 2374.773102][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2374.773102][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2374.773102][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2374.773102][   T72]      ipv6_add_addr+0x411/0x2000
[ 2374.773102][   T72]      inet6_addr_add+0x30e/0xa40
[ 2374.773102][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2374.773102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.773102][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.773102][   T72]      netlink_unicast+0x449/0x710
[ 2374.773102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.773102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.773102][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.773102][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.773102][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.773102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.773102][   T72] 
[ 2374.775092][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2374.775092][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2374.775092][   T72]      ipv6_find_idev+0x102/0x170
[ 2374.775092][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2374.775092][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.775092][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.775092][   T72]      netlink_unicast+0x449/0x710
[ 2374.775092][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.775092][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.775092][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.775092][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.775092][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.775092][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.775092][   T72] 
[ 2374.776632][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2374.776632][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2374.776632][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2374.776632][   T72]      ipv6_find_idev+0x102/0x170
[ 2374.776632][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2374.776632][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.776632][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.776632][   T72]      netlink_unicast+0x449/0x710
[ 2374.776632][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.776632][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.776632][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.776632][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.776632][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.776632][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.776632][   T72] 
[ 2374.778303][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2374.778583][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2374.778583][   T72]      netdev_get_by_index+0x5e/0x80
[ 2374.778583][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2374.778583][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2374.778583][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2374.778583][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2374.778583][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2374.778583][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2374.778583][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2374.778583][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2374.778583][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2374.778583][   T72]      vfs_write+0x9e5/0x10a0
[ 2374.778583][   T72]      ksys_write+0xf5/0x1e0
[ 2374.778583][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.778583][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.778583][   T72] 
[ 2374.780433][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2374.780433][   T72]      netdev_get_by_index+0x5e/0x80
[ 2374.780433][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2374.780433][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2374.780433][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2374.780433][   T72]      ipv6_add_addr+0x411/0x2000
[ 2374.780433][   T72]      inet6_addr_add+0x30e/0xa40
[ 2374.780433][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2374.780433][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.780433][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.780433][   T72]      netlink_unicast+0x449/0x710
[ 2374.780433][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.780433][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.780433][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.780433][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.780433][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.780433][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.780433][   T72] 
[ 2374.782411][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2374.782411][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2374.782411][   T72]      ipv6_find_idev+0x102/0x170
[ 2374.782411][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2374.782411][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.782411][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.782411][   T72]      netlink_unicast+0x449/0x710
[ 2374.782411][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.782411][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.782411][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.782411][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.782411][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.782411][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.782411][   T72] 
[ 2374.783924][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2374.783924][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2374.783924][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2374.783924][   T72]      ipv6_find_idev+0x102/0x170
[ 2374.783924][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2374.783924][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2374.783924][   T72]      netlink_rcv_skb+0x130/0x360
[ 2374.783924][   T72]      netlink_unicast+0x449/0x710
[ 2374.783924][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2374.783924][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2374.783924][   T72]      ___sys_sendmsg+0xee/0x170
[ 2374.783924][   T72]      __sys_sendmsg+0xcd/0x170
[ 2374.783924][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.783924][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.783924][   T72] 
[ 2374.785582][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2374.785905][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2374.785905][   T72]      dst_init+0x84/0x4a0
[ 2374.785905][   T72]      dst_alloc+0x97/0x150
[ 2374.785905][   T72]      ip6_dst_alloc+0x23/0x90
[ 2374.785905][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2374.785905][   T72]      ip6_pol_route+0x56f/0x840
[ 2374.785905][   T72]      fib6_rule_lookup+0x227/0x600
[ 2374.785905][   T72]      ip6_route_output_flags+0x251/0x460
[ 2374.785905][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2374.785905][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2374.785905][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2374.785905][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2374.785905][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2374.785905][   T72]      __sys_connect+0x217/0x2a0
[ 2374.785905][   T72]      __x64_sys_connect+0x72/0xb0
[ 2374.785905][   T72]      do_syscall_64+0xc6/0x1e0
[ 2374.785905][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2374.785905][   T72] 
[ 2385.028700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2385.029135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2385.029135][   T72]      netdev_get_by_index+0x5e/0x80
[ 2385.029135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2385.029135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2385.029135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2385.029135][   T72]      ipv6_add_addr+0x411/0x2000
[ 2385.029135][   T72]      inet6_addr_add+0x30e/0xa40
[ 2385.029135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2385.029135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.029135][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.029135][   T72]      netlink_unicast+0x449/0x710
[ 2385.029135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.029135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.029135][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.029135][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.029135][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.029135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.029135][   T72] 
[ 2385.031110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2385.031110][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2385.031110][   T72]      ipv6_find_idev+0x102/0x170
[ 2385.031110][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2385.031110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.031110][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.031110][   T72]      netlink_unicast+0x449/0x710
[ 2385.031110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.031110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.031110][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.031110][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.031110][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.031110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.031110][   T72] 
[ 2385.032624][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2385.032624][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2385.032624][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2385.032624][   T72]      ipv6_find_idev+0x102/0x170
[ 2385.032624][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2385.032624][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.032624][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.032624][   T72]      netlink_unicast+0x449/0x710
[ 2385.032624][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.032624][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.032624][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.032624][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.032624][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.032624][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.032624][   T72] 
[ 2385.034357][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2385.034729][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2385.034729][   T72]      netdev_get_by_index+0x5e/0x80
[ 2385.034729][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2385.034729][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2385.034729][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2385.034729][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2385.034729][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2385.034729][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2385.034729][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2385.034729][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2385.034729][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2385.034729][   T72]      vfs_write+0x9e5/0x10a0
[ 2385.034729][   T72]      ksys_write+0xf5/0x1e0
[ 2385.034729][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.034729][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.034729][   T72] 
[ 2385.037033][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2385.037033][   T72]      netdev_get_by_index+0x5e/0x80
[ 2385.037033][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2385.037033][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2385.037033][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2385.037033][   T72]      ipv6_add_addr+0x411/0x2000
[ 2385.037033][   T72]      inet6_addr_add+0x30e/0xa40
[ 2385.037033][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2385.037033][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.037033][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.037033][   T72]      netlink_unicast+0x449/0x710
[ 2385.037033][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.037033][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.037033][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.037033][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.037033][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.037033][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.037033][   T72] 
[ 2385.039598][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2385.039598][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2385.039598][   T72]      ipv6_find_idev+0x102/0x170
[ 2385.039598][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2385.039598][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.039598][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.039598][   T72]      netlink_unicast+0x449/0x710
[ 2385.039598][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.039598][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.039598][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.039598][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.039598][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.039598][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.039598][   T72] 
[ 2385.041574][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2385.041574][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2385.041574][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2385.041574][   T72]      ipv6_find_idev+0x102/0x170
[ 2385.041574][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2385.041574][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2385.041574][   T72]      netlink_rcv_skb+0x130/0x360
[ 2385.041574][   T72]      netlink_unicast+0x449/0x710
[ 2385.041574][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2385.041574][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2385.041574][   T72]      ___sys_sendmsg+0xee/0x170
[ 2385.041574][   T72]      __sys_sendmsg+0xcd/0x170
[ 2385.041574][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.041574][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.041574][   T72] 
[ 2385.043729][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2385.044027][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2385.044027][   T72]      dst_init+0x84/0x4a0
[ 2385.044027][   T72]      dst_alloc+0x97/0x150
[ 2385.044027][   T72]      ip6_dst_alloc+0x23/0x90
[ 2385.044027][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2385.044027][   T72]      ip6_pol_route+0x56f/0x840
[ 2385.044027][   T72]      fib6_rule_lookup+0x227/0x600
[ 2385.044027][   T72]      ip6_route_output_flags+0x251/0x460
[ 2385.044027][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2385.044027][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2385.044027][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2385.044027][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2385.044027][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2385.044027][   T72]      __sys_connect+0x217/0x2a0
[ 2385.044027][   T72]      __x64_sys_connect+0x72/0xb0
[ 2385.044027][   T72]      do_syscall_64+0xc6/0x1e0
[ 2385.044027][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2385.044027][   T72] 
[ 2395.284706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2395.285144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2395.285144][   T72]      netdev_get_by_index+0x5e/0x80
[ 2395.285144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2395.285144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2395.285144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2395.285144][   T72]      ipv6_add_addr+0x411/0x2000
[ 2395.285144][   T72]      inet6_addr_add+0x30e/0xa40
[ 2395.285144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2395.285144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.285144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.285144][   T72]      netlink_unicast+0x449/0x710
[ 2395.285144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.285144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.285144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.285144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.285144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.285144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.285144][   T72] 
[ 2395.287130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2395.287130][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2395.287130][   T72]      ipv6_find_idev+0x102/0x170
[ 2395.287130][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2395.287130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.287130][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.287130][   T72]      netlink_unicast+0x449/0x710
[ 2395.287130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.287130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.287130][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.287130][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.287130][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.287130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.287130][   T72] 
[ 2395.288648][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2395.288648][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2395.288648][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2395.288648][   T72]      ipv6_find_idev+0x102/0x170
[ 2395.288648][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2395.288648][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.288648][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.288648][   T72]      netlink_unicast+0x449/0x710
[ 2395.288648][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.288648][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.288648][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.288648][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.288648][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.288648][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.288648][   T72] 
[ 2395.290753][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2395.291095][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2395.291095][   T72]      netdev_get_by_index+0x5e/0x80
[ 2395.291095][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2395.291095][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2395.291095][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2395.291095][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2395.291095][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2395.291095][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2395.291095][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2395.291095][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2395.291095][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2395.291095][   T72]      vfs_write+0x9e5/0x10a0
[ 2395.291095][   T72]      ksys_write+0xf5/0x1e0
[ 2395.291095][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.291095][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.291095][   T72] 
[ 2395.293469][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2395.293469][   T72]      netdev_get_by_index+0x5e/0x80
[ 2395.293469][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2395.293469][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2395.293469][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2395.293469][   T72]      ipv6_add_addr+0x411/0x2000
[ 2395.293469][   T72]      inet6_addr_add+0x30e/0xa40
[ 2395.293469][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2395.293469][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.293469][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.293469][   T72]      netlink_unicast+0x449/0x710
[ 2395.293469][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.293469][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.293469][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.293469][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.293469][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.293469][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.293469][   T72] 
[ 2395.296090][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2395.296090][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2395.296090][   T72]      ipv6_find_idev+0x102/0x170
[ 2395.296090][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2395.296090][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.296090][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.296090][   T72]      netlink_unicast+0x449/0x710
[ 2395.296090][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.296090][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.296090][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.296090][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.296090][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.296090][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.296090][   T72] 
[ 2395.298065][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2395.298065][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2395.298065][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2395.298065][   T72]      ipv6_find_idev+0x102/0x170
[ 2395.298065][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2395.298065][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2395.298065][   T72]      netlink_rcv_skb+0x130/0x360
[ 2395.298065][   T72]      netlink_unicast+0x449/0x710
[ 2395.298065][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2395.298065][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2395.298065][   T72]      ___sys_sendmsg+0xee/0x170
[ 2395.298065][   T72]      __sys_sendmsg+0xcd/0x170
[ 2395.298065][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.298065][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.298065][   T72] 
[ 2395.300236][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2395.300518][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2395.300518][   T72]      dst_init+0x84/0x4a0
[ 2395.300518][   T72]      dst_alloc+0x97/0x150
[ 2395.300518][   T72]      ip6_dst_alloc+0x23/0x90
[ 2395.300518][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2395.300518][   T72]      ip6_pol_route+0x56f/0x840
[ 2395.300518][   T72]      fib6_rule_lookup+0x227/0x600
[ 2395.300518][   T72]      ip6_route_output_flags+0x251/0x460
[ 2395.300518][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2395.300518][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2395.300518][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2395.300518][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2395.300518][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2395.300518][   T72]      __sys_connect+0x217/0x2a0
[ 2395.300518][   T72]      __x64_sys_connect+0x72/0xb0
[ 2395.300518][   T72]      do_syscall_64+0xc6/0x1e0
[ 2395.300518][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2395.300518][   T72] 
[ 2405.540634][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2405.541078][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2405.541078][   T72]      netdev_get_by_index+0x5e/0x80
[ 2405.541078][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2405.541078][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2405.541078][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2405.541078][   T72]      ipv6_add_addr+0x411/0x2000
[ 2405.541078][   T72]      inet6_addr_add+0x30e/0xa40
[ 2405.541078][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2405.541078][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.541078][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.541078][   T72]      netlink_unicast+0x449/0x710
[ 2405.541078][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.541078][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.541078][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.541078][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.541078][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.541078][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.541078][   T72] 
[ 2405.543051][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2405.543051][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2405.543051][   T72]      ipv6_find_idev+0x102/0x170
[ 2405.543051][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2405.543051][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.543051][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.543051][   T72]      netlink_unicast+0x449/0x710
[ 2405.543051][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.543051][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.543051][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.543051][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.543051][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.543051][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.543051][   T72] 
[ 2405.544561][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2405.544561][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2405.544561][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2405.544561][   T72]      ipv6_find_idev+0x102/0x170
[ 2405.544561][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2405.544561][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.544561][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.544561][   T72]      netlink_unicast+0x449/0x710
[ 2405.544561][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.544561][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.544561][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.544561][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.544561][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.544561][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.544561][   T72] 
[ 2405.546216][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2405.546479][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2405.546479][   T72]      netdev_get_by_index+0x5e/0x80
[ 2405.546479][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2405.546479][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2405.546479][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2405.546479][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2405.546479][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2405.546479][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2405.546479][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2405.546479][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2405.546479][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2405.546479][   T72]      vfs_write+0x9e5/0x10a0
[ 2405.546479][   T72]      ksys_write+0xf5/0x1e0
[ 2405.546479][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.546479][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.546479][   T72] 
[ 2405.548288][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2405.548288][   T72]      netdev_get_by_index+0x5e/0x80
[ 2405.548288][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2405.548288][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2405.548288][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2405.548288][   T72]      ipv6_add_addr+0x411/0x2000
[ 2405.548288][   T72]      inet6_addr_add+0x30e/0xa40
[ 2405.548288][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2405.548288][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.548288][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.548288][   T72]      netlink_unicast+0x449/0x710
[ 2405.548288][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.548288][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.548288][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.548288][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.548288][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.548288][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.548288][   T72] 
[ 2405.551052][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2405.551052][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2405.551052][   T72]      ipv6_find_idev+0x102/0x170
[ 2405.551052][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2405.551052][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.551052][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.551052][   T72]      netlink_unicast+0x449/0x710
[ 2405.551052][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.551052][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.551052][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.551052][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.551052][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.551052][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.551052][   T72] 
[ 2405.553328][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2405.553328][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2405.553328][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2405.553328][   T72]      ipv6_find_idev+0x102/0x170
[ 2405.553328][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2405.553328][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2405.553328][   T72]      netlink_rcv_skb+0x130/0x360
[ 2405.553328][   T72]      netlink_unicast+0x449/0x710
[ 2405.553328][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2405.553328][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2405.553328][   T72]      ___sys_sendmsg+0xee/0x170
[ 2405.553328][   T72]      __sys_sendmsg+0xcd/0x170
[ 2405.553328][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.553328][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.553328][   T72] 
[ 2405.555514][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2405.555826][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2405.555826][   T72]      dst_init+0x84/0x4a0
[ 2405.555826][   T72]      dst_alloc+0x97/0x150
[ 2405.555826][   T72]      ip6_dst_alloc+0x23/0x90
[ 2405.555826][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2405.555826][   T72]      ip6_pol_route+0x56f/0x840
[ 2405.555826][   T72]      fib6_rule_lookup+0x227/0x600
[ 2405.555826][   T72]      ip6_route_output_flags+0x251/0x460
[ 2405.555826][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2405.555826][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2405.555826][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2405.555826][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2405.555826][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2405.555826][   T72]      __sys_connect+0x217/0x2a0
[ 2405.555826][   T72]      __x64_sys_connect+0x72/0xb0
[ 2405.555826][   T72]      do_syscall_64+0xc6/0x1e0
[ 2405.555826][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2405.555826][   T72] 
[ 2415.588711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2415.589146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2415.589146][   T72]      netdev_get_by_index+0x5e/0x80
[ 2415.589146][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2415.589146][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2415.589146][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2415.589146][   T72]      ipv6_add_addr+0x411/0x2000
[ 2415.589146][   T72]      inet6_addr_add+0x30e/0xa40
[ 2415.589146][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2415.589146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.589146][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.589146][   T72]      netlink_unicast+0x449/0x710
[ 2415.589146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.589146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.589146][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.589146][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.589146][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.589146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.589146][   T72] 
[ 2415.591514][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2415.591514][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2415.591514][   T72]      ipv6_find_idev+0x102/0x170
[ 2415.591514][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2415.591514][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.591514][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.591514][   T72]      netlink_unicast+0x449/0x710
[ 2415.591514][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.591514][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.591514][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.591514][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.591514][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.591514][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.591514][   T72] 
[ 2415.593038][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2415.593038][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2415.593038][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2415.593038][   T72]      ipv6_find_idev+0x102/0x170
[ 2415.593038][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2415.593038][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.593038][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.593038][   T72]      netlink_unicast+0x449/0x710
[ 2415.593038][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.593038][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.593038][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.593038][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.593038][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.593038][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.593038][   T72] 
[ 2415.594698][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2415.594962][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2415.594962][   T72]      netdev_get_by_index+0x5e/0x80
[ 2415.594962][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2415.594962][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2415.594962][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2415.594962][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2415.594962][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2415.594962][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2415.594962][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2415.594962][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2415.594962][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2415.594962][   T72]      vfs_write+0x9e5/0x10a0
[ 2415.594962][   T72]      ksys_write+0xf5/0x1e0
[ 2415.594962][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.594962][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.594962][   T72] 
[ 2415.596782][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2415.596782][   T72]      netdev_get_by_index+0x5e/0x80
[ 2415.596782][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2415.596782][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2415.596782][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2415.596782][   T72]      ipv6_add_addr+0x411/0x2000
[ 2415.596782][   T72]      inet6_addr_add+0x30e/0xa40
[ 2415.596782][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2415.596782][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.596782][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.596782][   T72]      netlink_unicast+0x449/0x710
[ 2415.596782][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.596782][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.596782][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.596782][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.596782][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.596782][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.596782][   T72] 
[ 2415.598761][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2415.598761][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2415.598761][   T72]      ipv6_find_idev+0x102/0x170
[ 2415.598761][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2415.598761][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.598761][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.598761][   T72]      netlink_unicast+0x449/0x710
[ 2415.598761][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.598761][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.598761][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.598761][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.598761][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.598761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.598761][   T72] 
[ 2415.600286][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2415.600286][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2415.600286][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2415.600286][   T72]      ipv6_find_idev+0x102/0x170
[ 2415.600286][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2415.600286][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2415.600286][   T72]      netlink_rcv_skb+0x130/0x360
[ 2415.600286][   T72]      netlink_unicast+0x449/0x710
[ 2415.600286][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2415.600286][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2415.600286][   T72]      ___sys_sendmsg+0xee/0x170
[ 2415.600286][   T72]      __sys_sendmsg+0xcd/0x170
[ 2415.600286][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.600286][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.600286][   T72] 
[ 2415.601940][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2415.602183][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2415.602183][   T72]      dst_init+0x84/0x4a0
[ 2415.602183][   T72]      dst_alloc+0x97/0x150
[ 2415.602183][   T72]      ip6_dst_alloc+0x23/0x90
[ 2415.602183][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2415.602183][   T72]      ip6_pol_route+0x56f/0x840
[ 2415.602183][   T72]      fib6_rule_lookup+0x227/0x600
[ 2415.602183][   T72]      ip6_route_output_flags+0x251/0x460
[ 2415.602183][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2415.602183][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2415.602183][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2415.602183][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2415.602183][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2415.602183][   T72]      __sys_connect+0x217/0x2a0
[ 2415.602183][   T72]      __x64_sys_connect+0x72/0xb0
[ 2415.602183][   T72]      do_syscall_64+0xc6/0x1e0
[ 2415.602183][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2415.602183][   T72] 
[ 2425.804698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2425.805136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2425.805136][   T72]      netdev_get_by_index+0x5e/0x80
[ 2425.805136][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2425.805136][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2425.805136][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2425.805136][   T72]      ipv6_add_addr+0x411/0x2000
[ 2425.805136][   T72]      inet6_addr_add+0x30e/0xa40
[ 2425.805136][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2425.805136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.805136][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.805136][   T72]      netlink_unicast+0x449/0x710
[ 2425.805136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.805136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.805136][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.805136][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.805136][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.805136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.805136][   T72] 
[ 2425.807132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2425.807132][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2425.807132][   T72]      ipv6_find_idev+0x102/0x170
[ 2425.807132][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2425.807132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.807132][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.807132][   T72]      netlink_unicast+0x449/0x710
[ 2425.807132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.807132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.807132][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.807132][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.807132][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.807132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.807132][   T72] 
[ 2425.808652][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2425.808652][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2425.808652][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2425.808652][   T72]      ipv6_find_idev+0x102/0x170
[ 2425.808652][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2425.808652][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.808652][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.808652][   T72]      netlink_unicast+0x449/0x710
[ 2425.808652][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.808652][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.808652][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.808652][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.808652][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.808652][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.808652][   T72] 
[ 2425.810312][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2425.810588][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2425.810588][   T72]      netdev_get_by_index+0x5e/0x80
[ 2425.810588][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2425.810588][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2425.810588][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2425.810588][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2425.810588][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2425.810588][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2425.810588][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2425.810588][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2425.810588][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2425.810588][   T72]      vfs_write+0x9e5/0x10a0
[ 2425.810588][   T72]      ksys_write+0xf5/0x1e0
[ 2425.810588][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.810588][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.810588][   T72] 
[ 2425.812411][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2425.812411][   T72]      netdev_get_by_index+0x5e/0x80
[ 2425.812411][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2425.812411][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2425.812411][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2425.812411][   T72]      ipv6_add_addr+0x411/0x2000
[ 2425.812411][   T72]      inet6_addr_add+0x30e/0xa40
[ 2425.812411][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2425.812411][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.812411][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.812411][   T72]      netlink_unicast+0x449/0x710
[ 2425.812411][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.812411][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.812411][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.812411][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.812411][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.812411][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.812411][   T72] 
[ 2425.814384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2425.814384][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2425.814384][   T72]      ipv6_find_idev+0x102/0x170
[ 2425.814384][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2425.814384][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.814384][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.814384][   T72]      netlink_unicast+0x449/0x710
[ 2425.814384][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.814384][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.814384][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.814384][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.814384][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.814384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.814384][   T72] 
[ 2425.817890][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2425.817890][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2425.817890][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2425.817890][   T72]      ipv6_find_idev+0x102/0x170
[ 2425.817890][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2425.817890][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2425.817890][   T72]      netlink_rcv_skb+0x130/0x360
[ 2425.817890][   T72]      netlink_unicast+0x449/0x710
[ 2425.817890][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2425.817890][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2425.817890][   T72]      ___sys_sendmsg+0xee/0x170
[ 2425.817890][   T72]      __sys_sendmsg+0xcd/0x170
[ 2425.817890][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.817890][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.817890][   T72] 
[ 2425.819559][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2425.819825][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2425.819825][   T72]      dst_init+0x84/0x4a0
[ 2425.819825][   T72]      dst_alloc+0x97/0x150
[ 2425.819825][   T72]      ip6_dst_alloc+0x23/0x90
[ 2425.819825][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2425.819825][   T72]      ip6_pol_route+0x56f/0x840
[ 2425.819825][   T72]      fib6_rule_lookup+0x227/0x600
[ 2425.819825][   T72]      ip6_route_output_flags+0x251/0x460
[ 2425.819825][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2425.819825][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2425.819825][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2425.819825][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2425.819825][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2425.819825][   T72]      __sys_connect+0x217/0x2a0
[ 2425.819825][   T72]      __x64_sys_connect+0x72/0xb0
[ 2425.819825][   T72]      do_syscall_64+0xc6/0x1e0
[ 2425.819825][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2425.819825][   T72] 
[ 2436.060694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2436.061128][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2436.061128][   T72]      netdev_get_by_index+0x5e/0x80
[ 2436.061128][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2436.061128][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2436.061128][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2436.061128][   T72]      ipv6_add_addr+0x411/0x2000
[ 2436.061128][   T72]      inet6_addr_add+0x30e/0xa40
[ 2436.061128][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2436.061128][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.061128][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.061128][   T72]      netlink_unicast+0x449/0x710
[ 2436.061128][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.061128][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.061128][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.061128][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.061128][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.061128][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.061128][   T72] 
[ 2436.063125][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2436.063125][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2436.063125][   T72]      ipv6_find_idev+0x102/0x170
[ 2436.063125][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2436.063125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.063125][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.063125][   T72]      netlink_unicast+0x449/0x710
[ 2436.063125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.063125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.063125][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.063125][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.063125][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.063125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.063125][   T72] 
[ 2436.064633][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2436.064633][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2436.064633][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2436.064633][   T72]      ipv6_find_idev+0x102/0x170
[ 2436.064633][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2436.064633][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.064633][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.064633][   T72]      netlink_unicast+0x449/0x710
[ 2436.064633][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.064633][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.064633][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.064633][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.064633][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.064633][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.064633][   T72] 
[ 2436.066284][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2436.066553][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2436.066553][   T72]      netdev_get_by_index+0x5e/0x80
[ 2436.066553][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2436.066553][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2436.066553][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2436.066553][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2436.066553][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2436.066553][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2436.066553][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2436.066553][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2436.066553][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2436.066553][   T72]      vfs_write+0x9e5/0x10a0
[ 2436.066553][   T72]      ksys_write+0xf5/0x1e0
[ 2436.066553][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.066553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.066553][   T72] 
[ 2436.068490][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2436.068490][   T72]      netdev_get_by_index+0x5e/0x80
[ 2436.068490][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2436.068490][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2436.068490][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2436.068490][   T72]      ipv6_add_addr+0x411/0x2000
[ 2436.068490][   T72]      inet6_addr_add+0x30e/0xa40
[ 2436.068490][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2436.068490][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.068490][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.068490][   T72]      netlink_unicast+0x449/0x710
[ 2436.068490][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.068490][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.068490][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.068490][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.068490][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.068490][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.068490][   T72] 
[ 2436.070538][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2436.070538][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2436.070538][   T72]      ipv6_find_idev+0x102/0x170
[ 2436.070538][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2436.070538][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.070538][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.070538][   T72]      netlink_unicast+0x449/0x710
[ 2436.070538][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.070538][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.070538][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.070538][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.070538][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.070538][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.070538][   T72] 
[ 2436.072050][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2436.072050][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2436.072050][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2436.072050][   T72]      ipv6_find_idev+0x102/0x170
[ 2436.072050][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2436.072050][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2436.072050][   T72]      netlink_rcv_skb+0x130/0x360
[ 2436.072050][   T72]      netlink_unicast+0x449/0x710
[ 2436.072050][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2436.072050][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2436.072050][   T72]      ___sys_sendmsg+0xee/0x170
[ 2436.072050][   T72]      __sys_sendmsg+0xcd/0x170
[ 2436.072050][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.072050][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.072050][   T72] 
[ 2436.073710][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2436.073950][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2436.073950][   T72]      dst_init+0x84/0x4a0
[ 2436.073950][   T72]      dst_alloc+0x97/0x150
[ 2436.073950][   T72]      ip6_dst_alloc+0x23/0x90
[ 2436.073950][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2436.073950][   T72]      ip6_pol_route+0x56f/0x840
[ 2436.073950][   T72]      fib6_rule_lookup+0x227/0x600
[ 2436.073950][   T72]      ip6_route_output_flags+0x251/0x460
[ 2436.073950][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2436.073950][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2436.073950][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2436.073950][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2436.073950][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2436.073950][   T72]      __sys_connect+0x217/0x2a0
[ 2436.073950][   T72]      __x64_sys_connect+0x72/0xb0
[ 2436.073950][   T72]      do_syscall_64+0xc6/0x1e0
[ 2436.073950][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2436.073950][   T72] 
[ 2446.316701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2446.317151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2446.317151][   T72]      netdev_get_by_index+0x5e/0x80
[ 2446.317151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2446.317151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2446.317151][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2446.317151][   T72]      ipv6_add_addr+0x411/0x2000
[ 2446.317151][   T72]      inet6_addr_add+0x30e/0xa40
[ 2446.317151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2446.317151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.317151][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.317151][   T72]      netlink_unicast+0x449/0x710
[ 2446.317151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.317151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.317151][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.317151][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.317151][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.317151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.317151][   T72] 
[ 2446.319156][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2446.319156][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2446.319156][   T72]      ipv6_find_idev+0x102/0x170
[ 2446.319156][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2446.319156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.319156][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.319156][   T72]      netlink_unicast+0x449/0x710
[ 2446.319156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.319156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.319156][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.319156][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.319156][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.319156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.319156][   T72] 
[ 2446.320681][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2446.320681][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2446.320681][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2446.320681][   T72]      ipv6_find_idev+0x102/0x170
[ 2446.320681][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2446.320681][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.320681][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.320681][   T72]      netlink_unicast+0x449/0x710
[ 2446.320681][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.320681][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.320681][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.320681][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.320681][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.320681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.320681][   T72] 
[ 2446.322372][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2446.322657][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2446.322657][   T72]      netdev_get_by_index+0x5e/0x80
[ 2446.322657][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2446.322657][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2446.322657][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2446.322657][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2446.322657][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2446.322657][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2446.322657][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2446.322657][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2446.322657][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2446.322657][   T72]      vfs_write+0x9e5/0x10a0
[ 2446.322657][   T72]      ksys_write+0xf5/0x1e0
[ 2446.322657][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.322657][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.322657][   T72] 
[ 2446.324490][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2446.324490][   T72]      netdev_get_by_index+0x5e/0x80
[ 2446.324490][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2446.324490][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2446.324490][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2446.324490][   T72]      ipv6_add_addr+0x411/0x2000
[ 2446.324490][   T72]      inet6_addr_add+0x30e/0xa40
[ 2446.324490][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2446.324490][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.324490][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.324490][   T72]      netlink_unicast+0x449/0x710
[ 2446.324490][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.324490][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.324490][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.324490][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.324490][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.324490][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.324490][   T72] 
[ 2446.326472][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2446.326472][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2446.326472][   T72]      ipv6_find_idev+0x102/0x170
[ 2446.326472][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2446.326472][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.326472][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.326472][   T72]      netlink_unicast+0x449/0x710
[ 2446.326472][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.326472][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.326472][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.326472][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.326472][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.326472][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.326472][   T72] 
[ 2446.328001][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2446.328001][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2446.328001][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2446.328001][   T72]      ipv6_find_idev+0x102/0x170
[ 2446.328001][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2446.328001][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2446.328001][   T72]      netlink_rcv_skb+0x130/0x360
[ 2446.328001][   T72]      netlink_unicast+0x449/0x710
[ 2446.328001][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2446.328001][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2446.328001][   T72]      ___sys_sendmsg+0xee/0x170
[ 2446.328001][   T72]      __sys_sendmsg+0xcd/0x170
[ 2446.328001][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.328001][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.328001][   T72] 
[ 2446.329691][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2446.329928][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2446.329928][   T72]      dst_init+0x84/0x4a0
[ 2446.329928][   T72]      dst_alloc+0x97/0x150
[ 2446.329928][   T72]      ip6_dst_alloc+0x23/0x90
[ 2446.329928][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2446.329928][   T72]      ip6_pol_route+0x56f/0x840
[ 2446.329928][   T72]      fib6_rule_lookup+0x227/0x600
[ 2446.329928][   T72]      ip6_route_output_flags+0x251/0x460
[ 2446.329928][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2446.329928][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2446.329928][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2446.329928][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2446.329928][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2446.329928][   T72]      __sys_connect+0x217/0x2a0
[ 2446.329928][   T72]      __x64_sys_connect+0x72/0xb0
[ 2446.329928][   T72]      do_syscall_64+0xc6/0x1e0
[ 2446.329928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2446.329928][   T72] 
[ 2456.572700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2456.573144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2456.573144][   T72]      netdev_get_by_index+0x5e/0x80
[ 2456.573144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2456.573144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2456.573144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2456.573144][   T72]      ipv6_add_addr+0x411/0x2000
[ 2456.573144][   T72]      inet6_addr_add+0x30e/0xa40
[ 2456.573144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2456.573144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.573144][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.573144][   T72]      netlink_unicast+0x449/0x710
[ 2456.573144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.573144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.573144][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.573144][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.573144][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.573144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.573144][   T72] 
[ 2456.575154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2456.575154][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2456.575154][   T72]      ipv6_find_idev+0x102/0x170
[ 2456.575154][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2456.575154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.575154][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.575154][   T72]      netlink_unicast+0x449/0x710
[ 2456.575154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.575154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.575154][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.575154][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.575154][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.575154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.575154][   T72] 
[ 2456.576684][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2456.576684][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2456.576684][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2456.576684][   T72]      ipv6_find_idev+0x102/0x170
[ 2456.576684][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2456.576684][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.576684][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.576684][   T72]      netlink_unicast+0x449/0x710
[ 2456.576684][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.576684][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.576684][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.576684][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.576684][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.576684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.576684][   T72] 
[ 2456.578373][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2456.578672][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2456.578672][   T72]      netdev_get_by_index+0x5e/0x80
[ 2456.578672][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2456.578672][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2456.578672][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2456.578672][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2456.578672][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2456.578672][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2456.578672][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2456.578672][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2456.578672][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2456.578672][   T72]      vfs_write+0x9e5/0x10a0
[ 2456.578672][   T72]      ksys_write+0xf5/0x1e0
[ 2456.578672][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.578672][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.578672][   T72] 
[ 2456.580522][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2456.580522][   T72]      netdev_get_by_index+0x5e/0x80
[ 2456.580522][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2456.580522][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2456.580522][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2456.580522][   T72]      ipv6_add_addr+0x411/0x2000
[ 2456.580522][   T72]      inet6_addr_add+0x30e/0xa40
[ 2456.580522][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2456.580522][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.580522][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.580522][   T72]      netlink_unicast+0x449/0x710
[ 2456.580522][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.580522][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.580522][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.580522][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.580522][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.580522][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.580522][   T72] 
[ 2456.582500][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2456.582500][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2456.582500][   T72]      ipv6_find_idev+0x102/0x170
[ 2456.582500][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2456.582500][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.582500][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.582500][   T72]      netlink_unicast+0x449/0x710
[ 2456.582500][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.582500][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.582500][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.582500][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.582500][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.582500][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.582500][   T72] 
[ 2456.584029][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2456.584029][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2456.584029][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2456.584029][   T72]      ipv6_find_idev+0x102/0x170
[ 2456.584029][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2456.584029][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2456.584029][   T72]      netlink_rcv_skb+0x130/0x360
[ 2456.584029][   T72]      netlink_unicast+0x449/0x710
[ 2456.584029][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2456.584029][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2456.584029][   T72]      ___sys_sendmsg+0xee/0x170
[ 2456.584029][   T72]      __sys_sendmsg+0xcd/0x170
[ 2456.584029][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.584029][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.584029][   T72] 
[ 2456.585706][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2456.585946][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2456.585946][   T72]      dst_init+0x84/0x4a0
[ 2456.585946][   T72]      dst_alloc+0x97/0x150
[ 2456.585946][   T72]      ip6_dst_alloc+0x23/0x90
[ 2456.585946][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2456.585946][   T72]      ip6_pol_route+0x56f/0x840
[ 2456.585946][   T72]      fib6_rule_lookup+0x227/0x600
[ 2456.585946][   T72]      ip6_route_output_flags+0x251/0x460
[ 2456.585946][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2456.585946][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2456.585946][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2456.585946][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2456.585946][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2456.585946][   T72]      __sys_connect+0x217/0x2a0
[ 2456.585946][   T72]      __x64_sys_connect+0x72/0xb0
[ 2456.585946][   T72]      do_syscall_64+0xc6/0x1e0
[ 2456.585946][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2456.585946][   T72] 
[ 2466.828741][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2466.829148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2466.829148][   T72]      netdev_get_by_index+0x5e/0x80
[ 2466.829148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2466.829148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2466.829148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2466.829148][   T72]      ipv6_add_addr+0x411/0x2000
[ 2466.829148][   T72]      inet6_addr_add+0x30e/0xa40
[ 2466.829148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2466.829148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.829148][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.829148][   T72]      netlink_unicast+0x449/0x710
[ 2466.829148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.829148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.829148][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.829148][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.829148][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.829148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.829148][   T72] 
[ 2466.831149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2466.831149][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2466.831149][   T72]      ipv6_find_idev+0x102/0x170
[ 2466.831149][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2466.831149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.831149][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.831149][   T72]      netlink_unicast+0x449/0x710
[ 2466.831149][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.831149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.831149][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.831149][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.831149][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.831149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.831149][   T72] 
[ 2466.832680][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2466.832680][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2466.832680][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2466.832680][   T72]      ipv6_find_idev+0x102/0x170
[ 2466.832680][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2466.832680][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.832680][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.832680][   T72]      netlink_unicast+0x449/0x710
[ 2466.832680][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.832680][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.832680][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.832680][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.832680][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.832680][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.832680][   T72] 
[ 2466.834375][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2466.834666][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2466.834666][   T72]      netdev_get_by_index+0x5e/0x80
[ 2466.834666][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2466.834666][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2466.834666][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2466.834666][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2466.834666][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2466.834666][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2466.834666][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2466.834666][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2466.834666][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2466.834666][   T72]      vfs_write+0x9e5/0x10a0
[ 2466.834666][   T72]      ksys_write+0xf5/0x1e0
[ 2466.834666][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.834666][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.834666][   T72] 
[ 2466.836509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2466.836509][   T72]      netdev_get_by_index+0x5e/0x80
[ 2466.836509][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2466.836509][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2466.836509][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2466.836509][   T72]      ipv6_add_addr+0x411/0x2000
[ 2466.836509][   T72]      inet6_addr_add+0x30e/0xa40
[ 2466.836509][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2466.836509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.836509][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.836509][   T72]      netlink_unicast+0x449/0x710
[ 2466.836509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.836509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.836509][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.836509][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.836509][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.836509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.836509][   T72] 
[ 2466.838502][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2466.838502][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2466.838502][   T72]      ipv6_find_idev+0x102/0x170
[ 2466.838502][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2466.838502][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.838502][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.838502][   T72]      netlink_unicast+0x449/0x710
[ 2466.838502][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.838502][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.838502][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.838502][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.838502][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.838502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.838502][   T72] 
[ 2466.840037][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2466.840037][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2466.840037][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2466.840037][   T72]      ipv6_find_idev+0x102/0x170
[ 2466.840037][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2466.840037][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2466.840037][   T72]      netlink_rcv_skb+0x130/0x360
[ 2466.840037][   T72]      netlink_unicast+0x449/0x710
[ 2466.840037][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2466.840037][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2466.840037][   T72]      ___sys_sendmsg+0xee/0x170
[ 2466.840037][   T72]      __sys_sendmsg+0xcd/0x170
[ 2466.840037][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.840037][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.840037][   T72] 
[ 2466.841705][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2466.841945][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2466.841945][   T72]      dst_init+0x84/0x4a0
[ 2466.841945][   T72]      dst_alloc+0x97/0x150
[ 2466.841945][   T72]      ip6_dst_alloc+0x23/0x90
[ 2466.841945][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2466.841945][   T72]      ip6_pol_route+0x56f/0x840
[ 2466.841945][   T72]      fib6_rule_lookup+0x227/0x600
[ 2466.841945][   T72]      ip6_route_output_flags+0x251/0x460
[ 2466.841945][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2466.841945][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2466.841945][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2466.841945][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2466.841945][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2466.841945][   T72]      __sys_connect+0x217/0x2a0
[ 2466.841945][   T72]      __x64_sys_connect+0x72/0xb0
[ 2466.841945][   T72]      do_syscall_64+0xc6/0x1e0
[ 2466.841945][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2466.841945][   T72] 
[ 2476.916706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2476.917159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2476.917159][   T72]      netdev_get_by_index+0x5e/0x80
[ 2476.917159][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2476.917159][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2476.917159][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2476.917159][   T72]      ipv6_add_addr+0x411/0x2000
[ 2476.917159][   T72]      inet6_addr_add+0x30e/0xa40
[ 2476.917159][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2476.917159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.917159][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.917159][   T72]      netlink_unicast+0x449/0x710
[ 2476.917159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.917159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.917159][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.917159][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.917159][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.917159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.917159][   T72] 
[ 2476.919159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2476.919159][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2476.919159][   T72]      ipv6_find_idev+0x102/0x170
[ 2476.919159][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2476.919159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.919159][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.919159][   T72]      netlink_unicast+0x449/0x710
[ 2476.919159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.919159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.919159][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.919159][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.919159][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.919159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.919159][   T72] 
[ 2476.920693][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2476.920693][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2476.920693][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2476.920693][   T72]      ipv6_find_idev+0x102/0x170
[ 2476.920693][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2476.920693][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.920693][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.920693][   T72]      netlink_unicast+0x449/0x710
[ 2476.920693][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.920693][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.920693][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.920693][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.920693][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.920693][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.920693][   T72] 
[ 2476.922381][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2476.922664][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2476.922664][   T72]      netdev_get_by_index+0x5e/0x80
[ 2476.922664][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2476.922664][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2476.922664][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2476.922664][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2476.922664][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2476.922664][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2476.922664][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2476.922664][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2476.922664][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2476.922664][   T72]      vfs_write+0x9e5/0x10a0
[ 2476.922664][   T72]      ksys_write+0xf5/0x1e0
[ 2476.922664][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.922664][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.922664][   T72] 
[ 2476.925006][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2476.925006][   T72]      netdev_get_by_index+0x5e/0x80
[ 2476.925006][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2476.925006][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2476.925006][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2476.925006][   T72]      ipv6_add_addr+0x411/0x2000
[ 2476.925006][   T72]      inet6_addr_add+0x30e/0xa40
[ 2476.925006][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2476.925006][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.925006][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.925006][   T72]      netlink_unicast+0x449/0x710
[ 2476.925006][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.925006][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.925006][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.925006][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.925006][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.925006][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.925006][   T72] 
[ 2476.927002][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2476.927002][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2476.927002][   T72]      ipv6_find_idev+0x102/0x170
[ 2476.927002][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2476.927002][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.927002][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.927002][   T72]      netlink_unicast+0x449/0x710
[ 2476.927002][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.927002][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.927002][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.927002][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.927002][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.927002][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.927002][   T72] 
[ 2476.928535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2476.928535][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2476.928535][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2476.928535][   T72]      ipv6_find_idev+0x102/0x170
[ 2476.928535][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2476.928535][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2476.928535][   T72]      netlink_rcv_skb+0x130/0x360
[ 2476.928535][   T72]      netlink_unicast+0x449/0x710
[ 2476.928535][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2476.928535][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2476.928535][   T72]      ___sys_sendmsg+0xee/0x170
[ 2476.928535][   T72]      __sys_sendmsg+0xcd/0x170
[ 2476.928535][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.928535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.928535][   T72] 
[ 2476.930224][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2476.930466][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2476.930466][   T72]      dst_init+0x84/0x4a0
[ 2476.930466][   T72]      dst_alloc+0x97/0x150
[ 2476.930466][   T72]      ip6_dst_alloc+0x23/0x90
[ 2476.930466][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2476.930466][   T72]      ip6_pol_route+0x56f/0x840
[ 2476.930466][   T72]      fib6_rule_lookup+0x227/0x600
[ 2476.930466][   T72]      ip6_route_output_flags+0x251/0x460
[ 2476.930466][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2476.930466][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2476.930466][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2476.930466][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2476.930466][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2476.930466][   T72]      __sys_connect+0x217/0x2a0
[ 2476.930466][   T72]      __x64_sys_connect+0x72/0xb0
[ 2476.930466][   T72]      do_syscall_64+0xc6/0x1e0
[ 2476.930466][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2476.930466][   T72] 
[ 2487.148702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2487.149138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2487.149138][   T72]      netdev_get_by_index+0x5e/0x80
[ 2487.149138][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2487.149138][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2487.149138][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2487.149138][   T72]      ipv6_add_addr+0x411/0x2000
[ 2487.149138][   T72]      inet6_addr_add+0x30e/0xa40
[ 2487.149138][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2487.149138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.149138][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.149138][   T72]      netlink_unicast+0x449/0x710
[ 2487.149138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.149138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.149138][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.149138][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.149138][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.149138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.149138][   T72] 
[ 2487.151136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2487.151136][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2487.151136][   T72]      ipv6_find_idev+0x102/0x170
[ 2487.151136][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2487.151136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.151136][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.151136][   T72]      netlink_unicast+0x449/0x710
[ 2487.151136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.151136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.151136][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.151136][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.151136][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.151136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.151136][   T72] 
[ 2487.152658][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2487.152658][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2487.152658][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2487.152658][   T72]      ipv6_find_idev+0x102/0x170
[ 2487.152658][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2487.152658][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.152658][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.152658][   T72]      netlink_unicast+0x449/0x710
[ 2487.152658][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.152658][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.152658][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.152658][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.152658][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.152658][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.152658][   T72] 
[ 2487.154321][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2487.154588][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2487.154588][   T72]      netdev_get_by_index+0x5e/0x80
[ 2487.154588][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2487.154588][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2487.154588][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2487.154588][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2487.154588][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2487.154588][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2487.154588][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2487.154588][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2487.154588][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2487.154588][   T72]      vfs_write+0x9e5/0x10a0
[ 2487.154588][   T72]      ksys_write+0xf5/0x1e0
[ 2487.154588][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.154588][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.154588][   T72] 
[ 2487.156408][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2487.156408][   T72]      netdev_get_by_index+0x5e/0x80
[ 2487.156408][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2487.156408][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2487.156408][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2487.156408][   T72]      ipv6_add_addr+0x411/0x2000
[ 2487.156408][   T72]      inet6_addr_add+0x30e/0xa40
[ 2487.156408][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2487.156408][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.156408][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.156408][   T72]      netlink_unicast+0x449/0x710
[ 2487.156408][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.156408][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.156408][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.156408][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.156408][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.156408][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.156408][   T72] 
[ 2487.158365][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2487.158365][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2487.158365][   T72]      ipv6_find_idev+0x102/0x170
[ 2487.158365][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2487.158365][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.158365][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.158365][   T72]      netlink_unicast+0x449/0x710
[ 2487.158365][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.158365][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.158365][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.158365][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.158365][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.158365][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.158365][   T72] 
[ 2487.159888][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2487.159888][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2487.159888][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2487.159888][   T72]      ipv6_find_idev+0x102/0x170
[ 2487.159888][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2487.159888][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2487.159888][   T72]      netlink_rcv_skb+0x130/0x360
[ 2487.159888][   T72]      netlink_unicast+0x449/0x710
[ 2487.159888][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2487.159888][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2487.159888][   T72]      ___sys_sendmsg+0xee/0x170
[ 2487.159888][   T72]      __sys_sendmsg+0xcd/0x170
[ 2487.159888][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.159888][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.159888][   T72] 
[ 2487.161552][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2487.161794][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2487.161794][   T72]      dst_init+0x84/0x4a0
[ 2487.161794][   T72]      dst_alloc+0x97/0x150
[ 2487.161794][   T72]      ip6_dst_alloc+0x23/0x90
[ 2487.161794][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2487.161794][   T72]      ip6_pol_route+0x56f/0x840
[ 2487.161794][   T72]      fib6_rule_lookup+0x227/0x600
[ 2487.161794][   T72]      ip6_route_output_flags+0x251/0x460
[ 2487.161794][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2487.161794][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2487.161794][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2487.161794][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2487.161794][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2487.161794][   T72]      __sys_connect+0x217/0x2a0
[ 2487.161794][   T72]      __x64_sys_connect+0x72/0xb0
[ 2487.161794][   T72]      do_syscall_64+0xc6/0x1e0
[ 2487.161794][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2487.161794][   T72] 
[ 2497.292651][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2497.293104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2497.293104][   T72]      netdev_get_by_index+0x5e/0x80
[ 2497.293104][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2497.293104][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2497.293104][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2497.293104][   T72]      ipv6_add_addr+0x411/0x2000
[ 2497.293104][   T72]      inet6_addr_add+0x30e/0xa40
[ 2497.293104][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2497.293104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.293104][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.293104][   T72]      netlink_unicast+0x449/0x710
[ 2497.293104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.293104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.293104][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.293104][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.293104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.293104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.293104][   T72] 
[ 2497.295110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2497.295110][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2497.295110][   T72]      ipv6_find_idev+0x102/0x170
[ 2497.295110][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2497.295110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.295110][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.295110][   T72]      netlink_unicast+0x449/0x710
[ 2497.295110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.295110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.295110][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.295110][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.295110][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.295110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.295110][   T72] 
[ 2497.296646][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2497.296646][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2497.296646][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2497.296646][   T72]      ipv6_find_idev+0x102/0x170
[ 2497.296646][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2497.296646][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.296646][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.296646][   T72]      netlink_unicast+0x449/0x710
[ 2497.296646][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.296646][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.296646][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.296646][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.296646][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.296646][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.296646][   T72] 
[ 2497.298334][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2497.298620][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2497.298620][   T72]      netdev_get_by_index+0x5e/0x80
[ 2497.298620][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2497.298620][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2497.298620][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2497.298620][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2497.298620][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2497.298620][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2497.298620][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2497.298620][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2497.298620][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2497.298620][   T72]      vfs_write+0x9e5/0x10a0
[ 2497.298620][   T72]      ksys_write+0xf5/0x1e0
[ 2497.298620][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.298620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.298620][   T72] 
[ 2497.300457][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2497.300457][   T72]      netdev_get_by_index+0x5e/0x80
[ 2497.300457][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2497.300457][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2497.300457][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2497.300457][   T72]      ipv6_add_addr+0x411/0x2000
[ 2497.300457][   T72]      inet6_addr_add+0x30e/0xa40
[ 2497.300457][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2497.300457][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.300457][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.300457][   T72]      netlink_unicast+0x449/0x710
[ 2497.300457][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.300457][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.300457][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.300457][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.300457][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.300457][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.300457][   T72] 
[ 2497.302434][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2497.302434][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2497.302434][   T72]      ipv6_find_idev+0x102/0x170
[ 2497.302434][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2497.302434][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.302434][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.302434][   T72]      netlink_unicast+0x449/0x710
[ 2497.302434][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.302434][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.302434][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.302434][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.302434][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.302434][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.302434][   T72] 
[ 2497.303959][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2497.303959][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2497.303959][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2497.303959][   T72]      ipv6_find_idev+0x102/0x170
[ 2497.303959][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2497.303959][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2497.303959][   T72]      netlink_rcv_skb+0x130/0x360
[ 2497.303959][   T72]      netlink_unicast+0x449/0x710
[ 2497.303959][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2497.303959][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2497.303959][   T72]      ___sys_sendmsg+0xee/0x170
[ 2497.303959][   T72]      __sys_sendmsg+0xcd/0x170
[ 2497.303959][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.303959][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.303959][   T72] 
[ 2497.305643][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2497.305881][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2497.305881][   T72]      dst_init+0x84/0x4a0
[ 2497.305881][   T72]      dst_alloc+0x97/0x150
[ 2497.305881][   T72]      ip6_dst_alloc+0x23/0x90
[ 2497.305881][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2497.305881][   T72]      ip6_pol_route+0x56f/0x840
[ 2497.305881][   T72]      fib6_rule_lookup+0x227/0x600
[ 2497.305881][   T72]      ip6_route_output_flags+0x251/0x460
[ 2497.305881][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2497.305881][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2497.305881][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2497.305881][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2497.305881][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2497.305881][   T72]      __sys_connect+0x217/0x2a0
[ 2497.305881][   T72]      __x64_sys_connect+0x72/0xb0
[ 2497.305881][   T72]      do_syscall_64+0xc6/0x1e0
[ 2497.305881][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2497.305881][   T72] 
[ 2507.372696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2507.373127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2507.373127][   T72]      netdev_get_by_index+0x5e/0x80
[ 2507.373127][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2507.373127][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2507.373127][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2507.373127][   T72]      ipv6_add_addr+0x411/0x2000
[ 2507.373127][   T72]      inet6_addr_add+0x30e/0xa40
[ 2507.373127][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2507.373127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.373127][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.373127][   T72]      netlink_unicast+0x449/0x710
[ 2507.373127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.373127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.373127][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.373127][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.373127][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.373127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.373127][   T72] 
[ 2507.375102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2507.375102][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2507.375102][   T72]      ipv6_find_idev+0x102/0x170
[ 2507.375102][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2507.375102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.375102][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.375102][   T72]      netlink_unicast+0x449/0x710
[ 2507.375102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.375102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.375102][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.375102][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.375102][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.375102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.375102][   T72] 
[ 2507.376628][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2507.376628][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2507.376628][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2507.376628][   T72]      ipv6_find_idev+0x102/0x170
[ 2507.376628][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2507.376628][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.376628][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.376628][   T72]      netlink_unicast+0x449/0x710
[ 2507.376628][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.376628][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.376628][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.376628][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.376628][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.376628][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.376628][   T72] 
[ 2507.378286][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2507.378560][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2507.378560][   T72]      netdev_get_by_index+0x5e/0x80
[ 2507.378560][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2507.378560][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2507.378560][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2507.378560][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2507.378560][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2507.378560][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2507.378560][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2507.378560][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2507.378560][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2507.378560][   T72]      vfs_write+0x9e5/0x10a0
[ 2507.378560][   T72]      ksys_write+0xf5/0x1e0
[ 2507.378560][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.378560][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.378560][   T72] 
[ 2507.380376][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2507.380376][   T72]      netdev_get_by_index+0x5e/0x80
[ 2507.380376][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2507.380376][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2507.380376][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2507.380376][   T72]      ipv6_add_addr+0x411/0x2000
[ 2507.380376][   T72]      inet6_addr_add+0x30e/0xa40
[ 2507.380376][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2507.380376][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.380376][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.380376][   T72]      netlink_unicast+0x449/0x710
[ 2507.380376][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.380376][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.380376][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.380376][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.380376][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.380376][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.380376][   T72] 
[ 2507.382333][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2507.382333][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2507.382333][   T72]      ipv6_find_idev+0x102/0x170
[ 2507.382333][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2507.382333][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.382333][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.382333][   T72]      netlink_unicast+0x449/0x710
[ 2507.382333][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.382333][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.382333][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.382333][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.382333][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.382333][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.382333][   T72] 
[ 2507.383871][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2507.383871][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2507.383871][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2507.383871][   T72]      ipv6_find_idev+0x102/0x170
[ 2507.383871][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2507.383871][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2507.383871][   T72]      netlink_rcv_skb+0x130/0x360
[ 2507.383871][   T72]      netlink_unicast+0x449/0x710
[ 2507.383871][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2507.383871][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2507.383871][   T72]      ___sys_sendmsg+0xee/0x170
[ 2507.383871][   T72]      __sys_sendmsg+0xcd/0x170
[ 2507.383871][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.383871][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.383871][   T72] 
[ 2507.385526][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2507.385771][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2507.385771][   T72]      dst_init+0x84/0x4a0
[ 2507.385771][   T72]      dst_alloc+0x97/0x150
[ 2507.385771][   T72]      ip6_dst_alloc+0x23/0x90
[ 2507.385771][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2507.385771][   T72]      ip6_pol_route+0x56f/0x840
[ 2507.385771][   T72]      fib6_rule_lookup+0x227/0x600
[ 2507.385771][   T72]      ip6_route_output_flags+0x251/0x460
[ 2507.385771][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2507.385771][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2507.385771][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2507.385771][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2507.385771][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2507.385771][   T72]      __sys_connect+0x217/0x2a0
[ 2507.385771][   T72]      __x64_sys_connect+0x72/0xb0
[ 2507.385771][   T72]      do_syscall_64+0xc6/0x1e0
[ 2507.385771][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2507.385771][   T72] 
[ 2517.412634][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2517.413068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2517.413068][   T72]      netdev_get_by_index+0x5e/0x80
[ 2517.413068][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2517.413068][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2517.413068][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2517.413068][   T72]      ipv6_add_addr+0x411/0x2000
[ 2517.413068][   T72]      inet6_addr_add+0x30e/0xa40
[ 2517.413068][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2517.413068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.413068][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.413068][   T72]      netlink_unicast+0x449/0x710
[ 2517.413068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.413068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.413068][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.413068][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.413068][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.413068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.413068][   T72] 
[ 2517.415044][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2517.415044][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2517.415044][   T72]      ipv6_find_idev+0x102/0x170
[ 2517.415044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2517.415044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.415044][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.415044][   T72]      netlink_unicast+0x449/0x710
[ 2517.415044][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.415044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.415044][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.415044][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.415044][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.415044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.415044][   T72] 
[ 2517.416560][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2517.416560][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2517.416560][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2517.416560][   T72]      ipv6_find_idev+0x102/0x170
[ 2517.416560][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2517.416560][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.416560][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.416560][   T72]      netlink_unicast+0x449/0x710
[ 2517.416560][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.416560][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.416560][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.416560][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.416560][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.416560][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.416560][   T72] 
[ 2517.418215][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2517.418488][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2517.418488][   T72]      netdev_get_by_index+0x5e/0x80
[ 2517.418488][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2517.418488][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2517.418488][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2517.418488][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2517.418488][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2517.418488][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2517.418488][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2517.418488][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2517.418488][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2517.418488][   T72]      vfs_write+0x9e5/0x10a0
[ 2517.418488][   T72]      ksys_write+0xf5/0x1e0
[ 2517.418488][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.418488][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.418488][   T72] 
[ 2517.420304][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2517.420304][   T72]      netdev_get_by_index+0x5e/0x80
[ 2517.420304][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2517.420304][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2517.420304][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2517.420304][   T72]      ipv6_add_addr+0x411/0x2000
[ 2517.420304][   T72]      inet6_addr_add+0x30e/0xa40
[ 2517.420304][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2517.420304][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.420304][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.420304][   T72]      netlink_unicast+0x449/0x710
[ 2517.420304][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.420304][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.420304][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.420304][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.420304][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.420304][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.420304][   T72] 
[ 2517.422259][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2517.422259][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2517.422259][   T72]      ipv6_find_idev+0x102/0x170
[ 2517.422259][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2517.422259][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.422259][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.422259][   T72]      netlink_unicast+0x449/0x710
[ 2517.422259][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.422259][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.422259][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.422259][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.422259][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.422259][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.422259][   T72] 
[ 2517.423771][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2517.423771][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2517.423771][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2517.423771][   T72]      ipv6_find_idev+0x102/0x170
[ 2517.423771][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2517.423771][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2517.423771][   T72]      netlink_rcv_skb+0x130/0x360
[ 2517.423771][   T72]      netlink_unicast+0x449/0x710
[ 2517.423771][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2517.423771][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2517.423771][   T72]      ___sys_sendmsg+0xee/0x170
[ 2517.423771][   T72]      __sys_sendmsg+0xcd/0x170
[ 2517.423771][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.423771][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.423771][   T72] 
[ 2517.425434][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2517.425688][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2517.425688][   T72]      dst_init+0x84/0x4a0
[ 2517.425688][   T72]      dst_alloc+0x97/0x150
[ 2517.425688][   T72]      ip6_dst_alloc+0x23/0x90
[ 2517.425688][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2517.425688][   T72]      ip6_pol_route+0x56f/0x840
[ 2517.425688][   T72]      fib6_rule_lookup+0x227/0x600
[ 2517.425688][   T72]      ip6_route_output_flags+0x251/0x460
[ 2517.425688][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2517.425688][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2517.425688][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2517.425688][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2517.425688][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2517.425688][   T72]      __sys_connect+0x217/0x2a0
[ 2517.425688][   T72]      __x64_sys_connect+0x72/0xb0
[ 2517.425688][   T72]      do_syscall_64+0xc6/0x1e0
[ 2517.425688][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2517.425688][   T72] 
[ 2527.676695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2527.677076][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2527.677076][   T72]      netdev_get_by_index+0x5e/0x80
[ 2527.677076][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2527.677076][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2527.677076][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2527.677076][   T72]      ipv6_add_addr+0x411/0x2000
[ 2527.677076][   T72]      inet6_addr_add+0x30e/0xa40
[ 2527.677076][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2527.677076][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.677076][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.677076][   T72]      netlink_unicast+0x449/0x710
[ 2527.677076][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.677076][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.677076][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.677076][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.677076][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.677076][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.677076][   T72] 
[ 2527.679558][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2527.679558][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2527.679558][   T72]      ipv6_find_idev+0x102/0x170
[ 2527.679558][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2527.679558][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.679558][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.679558][   T72]      netlink_unicast+0x449/0x710
[ 2527.679558][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.679558][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.679558][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.679558][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.679558][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.679558][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.679558][   T72] 
[ 2527.681563][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2527.681563][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2527.681563][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2527.681563][   T72]      ipv6_find_idev+0x102/0x170
[ 2527.681563][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2527.681563][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.681563][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.681563][   T72]      netlink_unicast+0x449/0x710
[ 2527.681563][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.681563][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.681563][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.681563][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.681563][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.681563][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.681563][   T72] 
[ 2527.683738][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2527.684075][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2527.684075][   T72]      netdev_get_by_index+0x5e/0x80
[ 2527.684075][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2527.684075][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2527.684075][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2527.684075][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2527.684075][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2527.684075][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2527.684075][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2527.684075][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2527.684075][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2527.684075][   T72]      vfs_write+0x9e5/0x10a0
[ 2527.684075][   T72]      ksys_write+0xf5/0x1e0
[ 2527.684075][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.684075][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.684075][   T72] 
[ 2527.686471][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2527.686471][   T72]      netdev_get_by_index+0x5e/0x80
[ 2527.686471][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2527.686471][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2527.686471][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2527.686471][   T72]      ipv6_add_addr+0x411/0x2000
[ 2527.686471][   T72]      inet6_addr_add+0x30e/0xa40
[ 2527.686471][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2527.686471][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.686471][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.686471][   T72]      netlink_unicast+0x449/0x710
[ 2527.686471][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.686471][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.686471][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.686471][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.686471][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.686471][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.686471][   T72] 
[ 2527.689061][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2527.689061][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2527.689061][   T72]      ipv6_find_idev+0x102/0x170
[ 2527.689061][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2527.689061][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.689061][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.689061][   T72]      netlink_unicast+0x449/0x710
[ 2527.689061][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.689061][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.689061][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.689061][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.689061][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.689061][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.689061][   T72] 
[ 2527.691057][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2527.691057][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2527.691057][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2527.691057][   T72]      ipv6_find_idev+0x102/0x170
[ 2527.691057][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2527.691057][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2527.691057][   T72]      netlink_rcv_skb+0x130/0x360
[ 2527.691057][   T72]      netlink_unicast+0x449/0x710
[ 2527.691057][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2527.691057][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2527.691057][   T72]      ___sys_sendmsg+0xee/0x170
[ 2527.691057][   T72]      __sys_sendmsg+0xcd/0x170
[ 2527.691057][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.691057][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.691057][   T72] 
[ 2527.693220][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2527.693506][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2527.693506][   T72]      dst_init+0x84/0x4a0
[ 2527.693506][   T72]      dst_alloc+0x97/0x150
[ 2527.693506][   T72]      ip6_dst_alloc+0x23/0x90
[ 2527.693506][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2527.693506][   T72]      ip6_pol_route+0x56f/0x840
[ 2527.693506][   T72]      fib6_rule_lookup+0x227/0x600
[ 2527.693506][   T72]      ip6_route_output_flags+0x251/0x460
[ 2527.693506][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2527.693506][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2527.693506][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2527.693506][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2527.693506][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2527.693506][   T72]      __sys_connect+0x217/0x2a0
[ 2527.693506][   T72]      __x64_sys_connect+0x72/0xb0
[ 2527.693506][   T72]      do_syscall_64+0xc6/0x1e0
[ 2527.693506][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2527.693506][   T72] 
[ 2537.708699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2537.709124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2537.709124][   T72]      netdev_get_by_index+0x5e/0x80
[ 2537.709124][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2537.709124][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2537.709124][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2537.709124][   T72]      ipv6_add_addr+0x411/0x2000
[ 2537.709124][   T72]      inet6_addr_add+0x30e/0xa40
[ 2537.709124][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2537.709124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.709124][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.709124][   T72]      netlink_unicast+0x449/0x710
[ 2537.709124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.709124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.709124][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.709124][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.709124][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.709124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.709124][   T72] 
[ 2537.711121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2537.711121][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2537.711121][   T72]      ipv6_find_idev+0x102/0x170
[ 2537.711121][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2537.711121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.711121][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.711121][   T72]      netlink_unicast+0x449/0x710
[ 2537.711121][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.711121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.711121][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.711121][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.711121][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.711121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.711121][   T72] 
[ 2537.712741][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2537.712741][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2537.712741][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2537.712741][   T72]      ipv6_find_idev+0x102/0x170
[ 2537.712741][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2537.712741][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.712741][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.712741][   T72]      netlink_unicast+0x449/0x710
[ 2537.712741][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.712741][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.712741][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.712741][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.712741][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.712741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.712741][   T72] 
[ 2537.714393][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2537.714673][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2537.714673][   T72]      netdev_get_by_index+0x5e/0x80
[ 2537.714673][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2537.714673][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2537.714673][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2537.714673][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2537.714673][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2537.714673][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2537.714673][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2537.714673][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2537.714673][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2537.714673][   T72]      vfs_write+0x9e5/0x10a0
[ 2537.714673][   T72]      ksys_write+0xf5/0x1e0
[ 2537.714673][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.714673][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.714673][   T72] 
[ 2537.716495][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2537.716495][   T72]      netdev_get_by_index+0x5e/0x80
[ 2537.716495][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2537.716495][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2537.716495][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2537.716495][   T72]      ipv6_add_addr+0x411/0x2000
[ 2537.716495][   T72]      inet6_addr_add+0x30e/0xa40
[ 2537.716495][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2537.716495][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.716495][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.716495][   T72]      netlink_unicast+0x449/0x710
[ 2537.716495][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.716495][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.716495][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.716495][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.716495][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.716495][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.716495][   T72] 
[ 2537.718459][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2537.718459][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2537.718459][   T72]      ipv6_find_idev+0x102/0x170
[ 2537.718459][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2537.718459][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.718459][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.718459][   T72]      netlink_unicast+0x449/0x710
[ 2537.718459][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.718459][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.718459][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.718459][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.718459][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.718459][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.718459][   T72] 
[ 2537.719958][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2537.719958][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2537.719958][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2537.719958][   T72]      ipv6_find_idev+0x102/0x170
[ 2537.719958][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2537.719958][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2537.719958][   T72]      netlink_rcv_skb+0x130/0x360
[ 2537.719958][   T72]      netlink_unicast+0x449/0x710
[ 2537.719958][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2537.719958][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2537.719958][   T72]      ___sys_sendmsg+0xee/0x170
[ 2537.719958][   T72]      __sys_sendmsg+0xcd/0x170
[ 2537.719958][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.719958][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.719958][   T72] 
[ 2537.721612][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2537.721848][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2537.721848][   T72]      dst_init+0x84/0x4a0
[ 2537.721848][   T72]      dst_alloc+0x97/0x150
[ 2537.721848][   T72]      ip6_dst_alloc+0x23/0x90
[ 2537.721848][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2537.721848][   T72]      ip6_pol_route+0x56f/0x840
[ 2537.721848][   T72]      fib6_rule_lookup+0x227/0x600
[ 2537.721848][   T72]      ip6_route_output_flags+0x251/0x460
[ 2537.721848][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2537.721848][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2537.721848][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2537.721848][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2537.721848][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2537.721848][   T72]      __sys_connect+0x217/0x2a0
[ 2537.721848][   T72]      __x64_sys_connect+0x72/0xb0
[ 2537.721848][   T72]      do_syscall_64+0xc6/0x1e0
[ 2537.721848][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2537.721848][   T72] 
[ 2547.844697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2547.845141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2547.845141][   T72]      netdev_get_by_index+0x5e/0x80
[ 2547.845141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2547.845141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2547.845141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2547.845141][   T72]      ipv6_add_addr+0x411/0x2000
[ 2547.845141][   T72]      inet6_addr_add+0x30e/0xa40
[ 2547.845141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2547.845141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.845141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.845141][   T72]      netlink_unicast+0x449/0x710
[ 2547.845141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.845141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.845141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.845141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.845141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.845141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.845141][   T72] 
[ 2547.847105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2547.847105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2547.847105][   T72]      ipv6_find_idev+0x102/0x170
[ 2547.847105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2547.847105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.847105][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.847105][   T72]      netlink_unicast+0x449/0x710
[ 2547.847105][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.847105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.847105][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.847105][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.847105][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.847105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.847105][   T72] 
[ 2547.848626][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2547.848626][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2547.848626][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2547.848626][   T72]      ipv6_find_idev+0x102/0x170
[ 2547.848626][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2547.848626][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.848626][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.848626][   T72]      netlink_unicast+0x449/0x710
[ 2547.848626][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.848626][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.848626][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.848626][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.848626][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.848626][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.848626][   T72] 
[ 2547.850281][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2547.850545][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2547.850545][   T72]      netdev_get_by_index+0x5e/0x80
[ 2547.850545][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2547.850545][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2547.850545][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2547.850545][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2547.850545][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2547.850545][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2547.850545][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2547.850545][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2547.850545][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2547.850545][   T72]      vfs_write+0x9e5/0x10a0
[ 2547.850545][   T72]      ksys_write+0xf5/0x1e0
[ 2547.850545][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.850545][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.850545][   T72] 
[ 2547.852359][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2547.852359][   T72]      netdev_get_by_index+0x5e/0x80
[ 2547.852359][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2547.852359][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2547.852359][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2547.852359][   T72]      ipv6_add_addr+0x411/0x2000
[ 2547.852359][   T72]      inet6_addr_add+0x30e/0xa40
[ 2547.852359][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2547.852359][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.852359][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.852359][   T72]      netlink_unicast+0x449/0x710
[ 2547.852359][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.852359][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.852359][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.852359][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.852359][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.852359][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.852359][   T72] 
[ 2547.854312][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2547.854312][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2547.854312][   T72]      ipv6_find_idev+0x102/0x170
[ 2547.854312][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2547.854312][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.854312][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.854312][   T72]      netlink_unicast+0x449/0x710
[ 2547.854312][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.854312][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.854312][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.854312][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.854312][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.854312][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.854312][   T72] 
[ 2547.855809][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2547.855809][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2547.855809][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2547.855809][   T72]      ipv6_find_idev+0x102/0x170
[ 2547.855809][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2547.855809][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2547.855809][   T72]      netlink_rcv_skb+0x130/0x360
[ 2547.855809][   T72]      netlink_unicast+0x449/0x710
[ 2547.855809][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2547.855809][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2547.855809][   T72]      ___sys_sendmsg+0xee/0x170
[ 2547.855809][   T72]      __sys_sendmsg+0xcd/0x170
[ 2547.855809][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.855809][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.855809][   T72] 
[ 2547.857451][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2547.857699][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2547.857699][   T72]      dst_init+0x84/0x4a0
[ 2547.857699][   T72]      dst_alloc+0x97/0x150
[ 2547.857699][   T72]      ip6_dst_alloc+0x23/0x90
[ 2547.857699][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2547.857699][   T72]      ip6_pol_route+0x56f/0x840
[ 2547.857699][   T72]      fib6_rule_lookup+0x227/0x600
[ 2547.857699][   T72]      ip6_route_output_flags+0x251/0x460
[ 2547.857699][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2547.857699][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2547.857699][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2547.857699][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2547.857699][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2547.857699][   T72]      __sys_connect+0x217/0x2a0
[ 2547.857699][   T72]      __x64_sys_connect+0x72/0xb0
[ 2547.857699][   T72]      do_syscall_64+0xc6/0x1e0
[ 2547.857699][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2547.857699][   T72] 
[ 2558.100704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2558.101131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2558.101131][   T72]      netdev_get_by_index+0x5e/0x80
[ 2558.101131][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2558.101131][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2558.101131][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2558.101131][   T72]      ipv6_add_addr+0x411/0x2000
[ 2558.101131][   T72]      inet6_addr_add+0x30e/0xa40
[ 2558.101131][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2558.101131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.101131][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.101131][   T72]      netlink_unicast+0x449/0x710
[ 2558.101131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.101131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.101131][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.101131][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.101131][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.101131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.101131][   T72] 
[ 2558.103103][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2558.103103][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2558.103103][   T72]      ipv6_find_idev+0x102/0x170
[ 2558.103103][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2558.103103][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.103103][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.103103][   T72]      netlink_unicast+0x449/0x710
[ 2558.103103][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.103103][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.103103][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.103103][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.103103][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.103103][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.103103][   T72] 
[ 2558.104615][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2558.104615][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2558.104615][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2558.104615][   T72]      ipv6_find_idev+0x102/0x170
[ 2558.104615][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2558.104615][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.104615][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.104615][   T72]      netlink_unicast+0x449/0x710
[ 2558.104615][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.104615][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.104615][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.104615][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.104615][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.104615][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.104615][   T72] 
[ 2558.106267][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2558.106532][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2558.106532][   T72]      netdev_get_by_index+0x5e/0x80
[ 2558.106532][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2558.106532][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2558.106532][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2558.106532][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2558.106532][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2558.106532][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2558.106532][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2558.106532][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2558.106532][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2558.106532][   T72]      vfs_write+0x9e5/0x10a0
[ 2558.106532][   T72]      ksys_write+0xf5/0x1e0
[ 2558.106532][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.106532][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.106532][   T72] 
[ 2558.108346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2558.108346][   T72]      netdev_get_by_index+0x5e/0x80
[ 2558.108346][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2558.108346][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2558.108346][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2558.108346][   T72]      ipv6_add_addr+0x411/0x2000
[ 2558.108346][   T72]      inet6_addr_add+0x30e/0xa40
[ 2558.108346][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2558.108346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.108346][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.108346][   T72]      netlink_unicast+0x449/0x710
[ 2558.108346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.108346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.108346][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.108346][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.108346][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.108346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.108346][   T72] 
[ 2558.110521][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2558.110521][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2558.110521][   T72]      ipv6_find_idev+0x102/0x170
[ 2558.110521][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2558.110521][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.110521][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.110521][   T72]      netlink_unicast+0x449/0x710
[ 2558.110521][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.110521][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.110521][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.110521][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.110521][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.110521][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.110521][   T72] 
[ 2558.112436][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2558.112436][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2558.112436][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2558.112436][   T72]      ipv6_find_idev+0x102/0x170
[ 2558.112436][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2558.112436][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2558.112436][   T72]      netlink_rcv_skb+0x130/0x360
[ 2558.112436][   T72]      netlink_unicast+0x449/0x710
[ 2558.112436][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2558.112436][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2558.112436][   T72]      ___sys_sendmsg+0xee/0x170
[ 2558.112436][   T72]      __sys_sendmsg+0xcd/0x170
[ 2558.112436][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.112436][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.112436][   T72] 
[ 2558.114556][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2558.114845][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2558.114845][   T72]      dst_init+0x84/0x4a0
[ 2558.114845][   T72]      dst_alloc+0x97/0x150
[ 2558.114845][   T72]      ip6_dst_alloc+0x23/0x90
[ 2558.114845][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2558.114845][   T72]      ip6_pol_route+0x56f/0x840
[ 2558.114845][   T72]      fib6_rule_lookup+0x227/0x600
[ 2558.114845][   T72]      ip6_route_output_flags+0x251/0x460
[ 2558.114845][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2558.114845][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2558.114845][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2558.114845][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2558.114845][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2558.114845][   T72]      __sys_connect+0x217/0x2a0
[ 2558.114845][   T72]      __x64_sys_connect+0x72/0xb0
[ 2558.114845][   T72]      do_syscall_64+0xc6/0x1e0
[ 2558.114845][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2558.114845][   T72] 
[ 2568.244722][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2568.245178][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2568.245178][   T72]      netdev_get_by_index+0x5e/0x80
[ 2568.245178][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2568.245178][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2568.245178][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2568.245178][   T72]      ipv6_add_addr+0x411/0x2000
[ 2568.245178][   T72]      inet6_addr_add+0x30e/0xa40
[ 2568.245178][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2568.245178][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.245178][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.245178][   T72]      netlink_unicast+0x449/0x710
[ 2568.245178][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.245178][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.245178][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.245178][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.245178][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.245178][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.245178][   T72] 
[ 2568.247180][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2568.247180][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2568.247180][   T72]      ipv6_find_idev+0x102/0x170
[ 2568.247180][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2568.247180][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.247180][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.247180][   T72]      netlink_unicast+0x449/0x710
[ 2568.247180][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.247180][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.247180][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.247180][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.247180][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.247180][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.247180][   T72] 
[ 2568.248718][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2568.248718][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2568.248718][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2568.248718][   T72]      ipv6_find_idev+0x102/0x170
[ 2568.248718][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2568.248718][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.248718][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.248718][   T72]      netlink_unicast+0x449/0x710
[ 2568.248718][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.248718][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.248718][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.248718][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.248718][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.248718][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.248718][   T72] 
[ 2568.250406][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2568.250686][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2568.250686][   T72]      netdev_get_by_index+0x5e/0x80
[ 2568.250686][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2568.250686][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2568.250686][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2568.250686][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2568.250686][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2568.250686][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2568.250686][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2568.250686][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2568.250686][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2568.250686][   T72]      vfs_write+0x9e5/0x10a0
[ 2568.250686][   T72]      ksys_write+0xf5/0x1e0
[ 2568.250686][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.250686][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.250686][   T72] 
[ 2568.252524][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2568.252524][   T72]      netdev_get_by_index+0x5e/0x80
[ 2568.252524][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2568.252524][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2568.252524][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2568.252524][   T72]      ipv6_add_addr+0x411/0x2000
[ 2568.252524][   T72]      inet6_addr_add+0x30e/0xa40
[ 2568.252524][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2568.252524][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.252524][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.252524][   T72]      netlink_unicast+0x449/0x710
[ 2568.252524][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.252524][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.252524][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.252524][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.252524][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.252524][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.252524][   T72] 
[ 2568.254498][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2568.254498][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2568.254498][   T72]      ipv6_find_idev+0x102/0x170
[ 2568.254498][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2568.254498][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.254498][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.254498][   T72]      netlink_unicast+0x449/0x710
[ 2568.254498][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.254498][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.254498][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.254498][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.254498][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.254498][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.254498][   T72] 
[ 2568.256034][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2568.256034][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2568.256034][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2568.256034][   T72]      ipv6_find_idev+0x102/0x170
[ 2568.256034][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2568.256034][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2568.256034][   T72]      netlink_rcv_skb+0x130/0x360
[ 2568.256034][   T72]      netlink_unicast+0x449/0x710
[ 2568.256034][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2568.256034][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2568.256034][   T72]      ___sys_sendmsg+0xee/0x170
[ 2568.256034][   T72]      __sys_sendmsg+0xcd/0x170
[ 2568.256034][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.256034][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.256034][   T72] 
[ 2568.257707][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2568.257950][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2568.257950][   T72]      dst_init+0x84/0x4a0
[ 2568.257950][   T72]      dst_alloc+0x97/0x150
[ 2568.257950][   T72]      ip6_dst_alloc+0x23/0x90
[ 2568.257950][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2568.257950][   T72]      ip6_pol_route+0x56f/0x840
[ 2568.257950][   T72]      fib6_rule_lookup+0x227/0x600
[ 2568.257950][   T72]      ip6_route_output_flags+0x251/0x460
[ 2568.257950][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2568.257950][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2568.257950][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2568.257950][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2568.257950][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2568.257950][   T72]      __sys_connect+0x217/0x2a0
[ 2568.257950][   T72]      __x64_sys_connect+0x72/0xb0
[ 2568.257950][   T72]      do_syscall_64+0xc6/0x1e0
[ 2568.257950][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2568.257950][   T72] 
[ 2578.500770][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2578.501206][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2578.501206][   T72]      netdev_get_by_index+0x5e/0x80
[ 2578.501206][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2578.501206][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2578.501206][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2578.501206][   T72]      ipv6_add_addr+0x411/0x2000
[ 2578.501206][   T72]      inet6_addr_add+0x30e/0xa40
[ 2578.501206][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2578.501206][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.501206][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.501206][   T72]      netlink_unicast+0x449/0x710
[ 2578.501206][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.501206][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.501206][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.501206][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.501206][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.501206][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.501206][   T72] 
[ 2578.503169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2578.503169][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2578.503169][   T72]      ipv6_find_idev+0x102/0x170
[ 2578.503169][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2578.503169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.503169][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.503169][   T72]      netlink_unicast+0x449/0x710
[ 2578.503169][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.503169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.503169][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.503169][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.503169][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.503169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.503169][   T72] 
[ 2578.504680][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2578.504680][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2578.504680][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2578.504680][   T72]      ipv6_find_idev+0x102/0x170
[ 2578.504680][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2578.504680][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.504680][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.504680][   T72]      netlink_unicast+0x449/0x710
[ 2578.504680][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.504680][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.504680][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.504680][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.504680][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.504680][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.504680][   T72] 
[ 2578.506348][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2578.506619][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2578.506619][   T72]      netdev_get_by_index+0x5e/0x80
[ 2578.506619][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2578.506619][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2578.506619][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2578.506619][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2578.506619][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2578.506619][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2578.506619][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2578.506619][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2578.506619][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2578.506619][   T72]      vfs_write+0x9e5/0x10a0
[ 2578.506619][   T72]      ksys_write+0xf5/0x1e0
[ 2578.506619][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.506619][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.506619][   T72] 
[ 2578.508435][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2578.508435][   T72]      netdev_get_by_index+0x5e/0x80
[ 2578.508435][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2578.508435][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2578.508435][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2578.508435][   T72]      ipv6_add_addr+0x411/0x2000
[ 2578.508435][   T72]      inet6_addr_add+0x30e/0xa40
[ 2578.508435][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2578.508435][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.508435][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.508435][   T72]      netlink_unicast+0x449/0x710
[ 2578.508435][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.508435][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.508435][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.508435][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.508435][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.508435][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.508435][   T72] 
[ 2578.510381][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2578.510381][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2578.510381][   T72]      ipv6_find_idev+0x102/0x170
[ 2578.510381][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2578.510381][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.510381][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.510381][   T72]      netlink_unicast+0x449/0x710
[ 2578.510381][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.510381][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.510381][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.510381][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.510381][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.510381][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.510381][   T72] 
[ 2578.511891][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2578.511891][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2578.511891][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2578.511891][   T72]      ipv6_find_idev+0x102/0x170
[ 2578.511891][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2578.511891][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2578.511891][   T72]      netlink_rcv_skb+0x130/0x360
[ 2578.511891][   T72]      netlink_unicast+0x449/0x710
[ 2578.511891][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2578.511891][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2578.511891][   T72]      ___sys_sendmsg+0xee/0x170
[ 2578.511891][   T72]      __sys_sendmsg+0xcd/0x170
[ 2578.511891][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.511891][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.511891][   T72] 
[ 2578.513538][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2578.513781][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2578.513781][   T72]      dst_init+0x84/0x4a0
[ 2578.513781][   T72]      dst_alloc+0x97/0x150
[ 2578.513781][   T72]      ip6_dst_alloc+0x23/0x90
[ 2578.513781][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2578.513781][   T72]      ip6_pol_route+0x56f/0x840
[ 2578.513781][   T72]      fib6_rule_lookup+0x227/0x600
[ 2578.513781][   T72]      ip6_route_output_flags+0x251/0x460
[ 2578.513781][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2578.513781][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2578.513781][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2578.513781][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2578.513781][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2578.513781][   T72]      __sys_connect+0x217/0x2a0
[ 2578.513781][   T72]      __x64_sys_connect+0x72/0xb0
[ 2578.513781][   T72]      do_syscall_64+0xc6/0x1e0
[ 2578.513781][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2578.513781][   T72] 
[ 2588.756699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2588.757135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2588.757135][   T72]      netdev_get_by_index+0x5e/0x80
[ 2588.757135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2588.757135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2588.757135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2588.757135][   T72]      ipv6_add_addr+0x411/0x2000
[ 2588.757135][   T72]      inet6_addr_add+0x30e/0xa40
[ 2588.757135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2588.757135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.757135][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.757135][   T72]      netlink_unicast+0x449/0x710
[ 2588.757135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.757135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.757135][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.757135][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.757135][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.757135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.757135][   T72] 
[ 2588.759123][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2588.759123][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2588.759123][   T72]      ipv6_find_idev+0x102/0x170
[ 2588.759123][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2588.759123][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.759123][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.759123][   T72]      netlink_unicast+0x449/0x710
[ 2588.759123][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.759123][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.759123][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.759123][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.759123][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.759123][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.759123][   T72] 
[ 2588.760630][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2588.760630][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2588.760630][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2588.760630][   T72]      ipv6_find_idev+0x102/0x170
[ 2588.760630][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2588.760630][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.760630][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.760630][   T72]      netlink_unicast+0x449/0x710
[ 2588.760630][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.760630][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.760630][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.760630][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.760630][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.760630][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.760630][   T72] 
[ 2588.762284][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2588.762552][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2588.762552][   T72]      netdev_get_by_index+0x5e/0x80
[ 2588.762552][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2588.762552][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2588.762552][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2588.762552][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2588.762552][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2588.762552][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2588.762552][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2588.762552][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2588.762552][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2588.762552][   T72]      vfs_write+0x9e5/0x10a0
[ 2588.762552][   T72]      ksys_write+0xf5/0x1e0
[ 2588.762552][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.762552][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.762552][   T72] 
[ 2588.764367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2588.764367][   T72]      netdev_get_by_index+0x5e/0x80
[ 2588.764367][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2588.764367][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2588.764367][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2588.764367][   T72]      ipv6_add_addr+0x411/0x2000
[ 2588.764367][   T72]      inet6_addr_add+0x30e/0xa40
[ 2588.764367][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2588.764367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.764367][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.764367][   T72]      netlink_unicast+0x449/0x710
[ 2588.764367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.764367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.764367][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.764367][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.764367][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.764367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.764367][   T72] 
[ 2588.766320][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2588.766320][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2588.766320][   T72]      ipv6_find_idev+0x102/0x170
[ 2588.766320][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2588.766320][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.766320][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.766320][   T72]      netlink_unicast+0x449/0x710
[ 2588.766320][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.766320][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.766320][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.766320][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.766320][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.766320][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.766320][   T72] 
[ 2588.767829][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2588.767829][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2588.767829][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2588.767829][   T72]      ipv6_find_idev+0x102/0x170
[ 2588.767829][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2588.767829][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2588.767829][   T72]      netlink_rcv_skb+0x130/0x360
[ 2588.767829][   T72]      netlink_unicast+0x449/0x710
[ 2588.767829][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2588.767829][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2588.767829][   T72]      ___sys_sendmsg+0xee/0x170
[ 2588.767829][   T72]      __sys_sendmsg+0xcd/0x170
[ 2588.767829][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.767829][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.767829][   T72] 
[ 2588.769500][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2588.769746][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2588.769746][   T72]      dst_init+0x84/0x4a0
[ 2588.769746][   T72]      dst_alloc+0x97/0x150
[ 2588.769746][   T72]      ip6_dst_alloc+0x23/0x90
[ 2588.769746][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2588.769746][   T72]      ip6_pol_route+0x56f/0x840
[ 2588.769746][   T72]      fib6_rule_lookup+0x227/0x600
[ 2588.769746][   T72]      ip6_route_output_flags+0x251/0x460
[ 2588.769746][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2588.769746][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2588.769746][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2588.769746][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2588.769746][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2588.769746][   T72]      __sys_connect+0x217/0x2a0
[ 2588.769746][   T72]      __x64_sys_connect+0x72/0xb0
[ 2588.769746][   T72]      do_syscall_64+0xc6/0x1e0
[ 2588.769746][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2588.769746][   T72] 
[ 2599.012702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2599.013161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2599.013161][   T72]      netdev_get_by_index+0x5e/0x80
[ 2599.013161][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2599.013161][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2599.013161][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2599.013161][   T72]      ipv6_add_addr+0x411/0x2000
[ 2599.013161][   T72]      inet6_addr_add+0x30e/0xa40
[ 2599.013161][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2599.013161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.013161][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.013161][   T72]      netlink_unicast+0x449/0x710
[ 2599.013161][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.013161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.013161][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.013161][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.013161][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.013161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.013161][   T72] 
[ 2599.015157][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2599.015157][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2599.015157][   T72]      ipv6_find_idev+0x102/0x170
[ 2599.015157][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2599.015157][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.015157][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.015157][   T72]      netlink_unicast+0x449/0x710
[ 2599.015157][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.015157][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.015157][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.015157][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.015157][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.015157][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.015157][   T72] 
[ 2599.016686][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2599.016686][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2599.016686][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2599.016686][   T72]      ipv6_find_idev+0x102/0x170
[ 2599.016686][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2599.016686][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.016686][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.016686][   T72]      netlink_unicast+0x449/0x710
[ 2599.016686][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.016686][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.016686][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.016686][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.016686][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.016686][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.016686][   T72] 
[ 2599.018378][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2599.018667][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2599.018667][   T72]      netdev_get_by_index+0x5e/0x80
[ 2599.018667][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2599.018667][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2599.018667][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2599.018667][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2599.018667][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2599.018667][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2599.018667][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2599.018667][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2599.018667][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2599.018667][   T72]      vfs_write+0x9e5/0x10a0
[ 2599.018667][   T72]      ksys_write+0xf5/0x1e0
[ 2599.018667][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.018667][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.018667][   T72] 
[ 2599.020495][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2599.020495][   T72]      netdev_get_by_index+0x5e/0x80
[ 2599.020495][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2599.020495][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2599.020495][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2599.020495][   T72]      ipv6_add_addr+0x411/0x2000
[ 2599.020495][   T72]      inet6_addr_add+0x30e/0xa40
[ 2599.020495][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2599.020495][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.020495][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.020495][   T72]      netlink_unicast+0x449/0x710
[ 2599.020495][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.020495][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.020495][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.020495][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.020495][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.020495][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.020495][   T72] 
[ 2599.022470][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2599.022470][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2599.022470][   T72]      ipv6_find_idev+0x102/0x170
[ 2599.022470][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2599.022470][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.022470][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.022470][   T72]      netlink_unicast+0x449/0x710
[ 2599.022470][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.022470][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.022470][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.022470][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.022470][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.022470][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.022470][   T72] 
[ 2599.023992][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2599.023992][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2599.023992][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2599.023992][   T72]      ipv6_find_idev+0x102/0x170
[ 2599.023992][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2599.023992][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2599.023992][   T72]      netlink_rcv_skb+0x130/0x360
[ 2599.023992][   T72]      netlink_unicast+0x449/0x710
[ 2599.023992][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2599.023992][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2599.023992][   T72]      ___sys_sendmsg+0xee/0x170
[ 2599.023992][   T72]      __sys_sendmsg+0xcd/0x170
[ 2599.023992][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.023992][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.023992][   T72] 
[ 2599.025673][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2599.025912][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2599.025912][   T72]      dst_init+0x84/0x4a0
[ 2599.025912][   T72]      dst_alloc+0x97/0x150
[ 2599.025912][   T72]      ip6_dst_alloc+0x23/0x90
[ 2599.025912][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2599.025912][   T72]      ip6_pol_route+0x56f/0x840
[ 2599.025912][   T72]      fib6_rule_lookup+0x227/0x600
[ 2599.025912][   T72]      ip6_route_output_flags+0x251/0x460
[ 2599.025912][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2599.025912][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2599.025912][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2599.025912][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2599.025912][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2599.025912][   T72]      __sys_connect+0x217/0x2a0
[ 2599.025912][   T72]      __x64_sys_connect+0x72/0xb0
[ 2599.025912][   T72]      do_syscall_64+0xc6/0x1e0
[ 2599.025912][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2599.025912][   T72] 
[ 2609.268637][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2609.269012][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2609.269012][   T72]      netdev_get_by_index+0x5e/0x80
[ 2609.269012][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2609.269012][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2609.269012][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2609.269012][   T72]      ipv6_add_addr+0x411/0x2000
[ 2609.269012][   T72]      inet6_addr_add+0x30e/0xa40
[ 2609.269012][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2609.269012][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.269012][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.269012][   T72]      netlink_unicast+0x449/0x710
[ 2609.269012][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.269012][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.269012][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.269012][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.269012][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.269012][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.269012][   T72] 
[ 2609.271013][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2609.271013][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2609.271013][   T72]      ipv6_find_idev+0x102/0x170
[ 2609.271013][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2609.271013][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.271013][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.271013][   T72]      netlink_unicast+0x449/0x710
[ 2609.271013][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.271013][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.271013][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.271013][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.271013][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.271013][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.271013][   T72] 
[ 2609.272530][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2609.272530][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2609.272530][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2609.272530][   T72]      ipv6_find_idev+0x102/0x170
[ 2609.272530][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2609.272530][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.272530][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.272530][   T72]      netlink_unicast+0x449/0x710
[ 2609.272530][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.272530][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.272530][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.272530][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.272530][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.272530][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.272530][   T72] 
[ 2609.274193][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2609.274467][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2609.274467][   T72]      netdev_get_by_index+0x5e/0x80
[ 2609.274467][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2609.274467][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2609.274467][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2609.274467][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2609.274467][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2609.274467][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2609.274467][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2609.274467][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2609.274467][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2609.274467][   T72]      vfs_write+0x9e5/0x10a0
[ 2609.274467][   T72]      ksys_write+0xf5/0x1e0
[ 2609.274467][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.274467][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.274467][   T72] 
[ 2609.276859][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2609.276859][   T72]      netdev_get_by_index+0x5e/0x80
[ 2609.276859][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2609.276859][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2609.276859][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2609.276859][   T72]      ipv6_add_addr+0x411/0x2000
[ 2609.276859][   T72]      inet6_addr_add+0x30e/0xa40
[ 2609.276859][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2609.276859][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.276859][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.276859][   T72]      netlink_unicast+0x449/0x710
[ 2609.276859][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.276859][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.276859][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.276859][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.276859][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.276859][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.276859][   T72] 
[ 2609.280173][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2609.280173][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2609.280173][   T72]      ipv6_find_idev+0x102/0x170
[ 2609.280173][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2609.280173][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.280173][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.280173][   T72]      netlink_unicast+0x449/0x710
[ 2609.280173][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.280173][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.280173][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.280173][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.280173][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.280173][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.280173][   T72] 
[ 2609.282736][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2609.282736][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2609.282736][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2609.282736][   T72]      ipv6_find_idev+0x102/0x170
[ 2609.282736][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2609.282736][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2609.282736][   T72]      netlink_rcv_skb+0x130/0x360
[ 2609.282736][   T72]      netlink_unicast+0x449/0x710
[ 2609.282736][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2609.282736][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2609.282736][   T72]      ___sys_sendmsg+0xee/0x170
[ 2609.282736][   T72]      __sys_sendmsg+0xcd/0x170
[ 2609.282736][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.282736][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.282736][   T72] 
[ 2609.285522][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2609.285928][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2609.285928][   T72]      dst_init+0x84/0x4a0
[ 2609.285928][   T72]      dst_alloc+0x97/0x150
[ 2609.285928][   T72]      ip6_dst_alloc+0x23/0x90
[ 2609.285928][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2609.285928][   T72]      ip6_pol_route+0x56f/0x840
[ 2609.285928][   T72]      fib6_rule_lookup+0x227/0x600
[ 2609.285928][   T72]      ip6_route_output_flags+0x251/0x460
[ 2609.285928][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2609.285928][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2609.285928][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2609.285928][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2609.285928][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2609.285928][   T72]      __sys_connect+0x217/0x2a0
[ 2609.285928][   T72]      __x64_sys_connect+0x72/0xb0
[ 2609.285928][   T72]      do_syscall_64+0xc6/0x1e0
[ 2609.285928][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2609.285928][   T72] 
[ 2619.332716][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2619.333117][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2619.333117][   T72]      netdev_get_by_index+0x5e/0x80
[ 2619.333117][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2619.333117][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2619.333117][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2619.333117][   T72]      ipv6_add_addr+0x411/0x2000
[ 2619.333117][   T72]      inet6_addr_add+0x30e/0xa40
[ 2619.333117][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2619.333117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.333117][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.333117][   T72]      netlink_unicast+0x449/0x710
[ 2619.333117][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.333117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.333117][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.333117][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.333117][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.333117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.333117][   T72] 
[ 2619.335102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2619.335102][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2619.335102][   T72]      ipv6_find_idev+0x102/0x170
[ 2619.335102][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2619.335102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.335102][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.335102][   T72]      netlink_unicast+0x449/0x710
[ 2619.335102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.335102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.335102][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.335102][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.335102][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.335102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.335102][   T72] 
[ 2619.336618][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2619.336618][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2619.336618][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2619.336618][   T72]      ipv6_find_idev+0x102/0x170
[ 2619.336618][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2619.336618][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.336618][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.336618][   T72]      netlink_unicast+0x449/0x710
[ 2619.336618][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.336618][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.336618][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.336618][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.336618][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.336618][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.336618][   T72] 
[ 2619.338293][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2619.338563][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2619.338563][   T72]      netdev_get_by_index+0x5e/0x80
[ 2619.338563][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2619.338563][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2619.338563][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2619.338563][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2619.338563][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2619.338563][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2619.338563][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2619.338563][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2619.338563][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2619.338563][   T72]      vfs_write+0x9e5/0x10a0
[ 2619.338563][   T72]      ksys_write+0xf5/0x1e0
[ 2619.338563][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.338563][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.338563][   T72] 
[ 2619.340387][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2619.340387][   T72]      netdev_get_by_index+0x5e/0x80
[ 2619.340387][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2619.340387][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2619.340387][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2619.340387][   T72]      ipv6_add_addr+0x411/0x2000
[ 2619.340387][   T72]      inet6_addr_add+0x30e/0xa40
[ 2619.340387][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2619.340387][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.340387][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.340387][   T72]      netlink_unicast+0x449/0x710
[ 2619.340387][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.340387][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.340387][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.340387][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.340387][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.340387][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.340387][   T72] 
[ 2619.342345][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2619.342345][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2619.342345][   T72]      ipv6_find_idev+0x102/0x170
[ 2619.342345][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2619.342345][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.342345][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.342345][   T72]      netlink_unicast+0x449/0x710
[ 2619.342345][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.342345][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.342345][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.342345][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.342345][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.342345][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.342345][   T72] 
[ 2619.343860][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2619.343860][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2619.343860][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2619.343860][   T72]      ipv6_find_idev+0x102/0x170
[ 2619.343860][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2619.343860][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2619.343860][   T72]      netlink_rcv_skb+0x130/0x360
[ 2619.343860][   T72]      netlink_unicast+0x449/0x710
[ 2619.343860][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2619.343860][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2619.343860][   T72]      ___sys_sendmsg+0xee/0x170
[ 2619.343860][   T72]      __sys_sendmsg+0xcd/0x170
[ 2619.343860][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.343860][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.343860][   T72] 
[ 2619.345518][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2619.345769][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2619.345769][   T72]      dst_init+0x84/0x4a0
[ 2619.345769][   T72]      dst_alloc+0x97/0x150
[ 2619.345769][   T72]      ip6_dst_alloc+0x23/0x90
[ 2619.345769][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2619.345769][   T72]      ip6_pol_route+0x56f/0x840
[ 2619.345769][   T72]      fib6_rule_lookup+0x227/0x600
[ 2619.345769][   T72]      ip6_route_output_flags+0x251/0x460
[ 2619.345769][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2619.345769][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2619.345769][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2619.345769][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2619.345769][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2619.345769][   T72]      __sys_connect+0x217/0x2a0
[ 2619.345769][   T72]      __x64_sys_connect+0x72/0xb0
[ 2619.345769][   T72]      do_syscall_64+0xc6/0x1e0
[ 2619.345769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2619.345769][   T72] 
[ 2629.380694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2629.381643][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2629.381643][   T72]      netdev_get_by_index+0x5e/0x80
[ 2629.381643][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2629.381643][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2629.381643][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2629.381643][   T72]      ipv6_add_addr+0x411/0x2000
[ 2629.381643][   T72]      inet6_addr_add+0x30e/0xa40
[ 2629.381643][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2629.381643][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.381643][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.381643][   T72]      netlink_unicast+0x449/0x710
[ 2629.381643][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.381643][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.381643][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.381643][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.381643][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.381643][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.381643][   T72] 
[ 2629.385319][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2629.385319][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2629.385319][   T72]      ipv6_find_idev+0x102/0x170
[ 2629.385319][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2629.385319][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.385319][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.385319][   T72]      netlink_unicast+0x449/0x710
[ 2629.385319][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.385319][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.385319][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.385319][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.385319][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.385319][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.385319][   T72] 
[ 2629.386850][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2629.386850][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2629.386850][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2629.386850][   T72]      ipv6_find_idev+0x102/0x170
[ 2629.386850][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2629.386850][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.386850][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.386850][   T72]      netlink_unicast+0x449/0x710
[ 2629.386850][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.386850][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.386850][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.386850][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.386850][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.386850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.386850][   T72] 
[ 2629.388535][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2629.388843][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2629.388843][   T72]      netdev_get_by_index+0x5e/0x80
[ 2629.388843][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2629.388843][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2629.388843][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2629.388843][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2629.388843][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2629.388843][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2629.388843][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2629.388843][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2629.388843][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2629.388843][   T72]      vfs_write+0x9e5/0x10a0
[ 2629.388843][   T72]      ksys_write+0xf5/0x1e0
[ 2629.388843][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.388843][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.388843][   T72] 
[ 2629.390677][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2629.390677][   T72]      netdev_get_by_index+0x5e/0x80
[ 2629.390677][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2629.390677][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2629.390677][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2629.390677][   T72]      ipv6_add_addr+0x411/0x2000
[ 2629.390677][   T72]      inet6_addr_add+0x30e/0xa40
[ 2629.390677][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2629.390677][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.390677][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.390677][   T72]      netlink_unicast+0x449/0x710
[ 2629.390677][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.390677][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.390677][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.390677][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.390677][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.390677][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.390677][   T72] 
[ 2629.392656][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2629.392656][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2629.392656][   T72]      ipv6_find_idev+0x102/0x170
[ 2629.392656][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2629.392656][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.392656][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.392656][   T72]      netlink_unicast+0x449/0x710
[ 2629.392656][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.392656][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.392656][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.392656][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.392656][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.392656][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.392656][   T72] 
[ 2629.394971][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2629.394971][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2629.394971][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2629.394971][   T72]      ipv6_find_idev+0x102/0x170
[ 2629.394971][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2629.394971][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2629.394971][   T72]      netlink_rcv_skb+0x130/0x360
[ 2629.394971][   T72]      netlink_unicast+0x449/0x710
[ 2629.394971][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2629.394971][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2629.394971][   T72]      ___sys_sendmsg+0xee/0x170
[ 2629.394971][   T72]      __sys_sendmsg+0xcd/0x170
[ 2629.394971][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.394971][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.394971][   T72] 
[ 2629.397779][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2629.398194][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2629.398194][   T72]      dst_init+0x84/0x4a0
[ 2629.398194][   T72]      dst_alloc+0x97/0x150
[ 2629.398194][   T72]      ip6_dst_alloc+0x23/0x90
[ 2629.398194][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2629.398194][   T72]      ip6_pol_route+0x56f/0x840
[ 2629.398194][   T72]      fib6_rule_lookup+0x227/0x600
[ 2629.398194][   T72]      ip6_route_output_flags+0x251/0x460
[ 2629.398194][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2629.398194][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2629.398194][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2629.398194][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2629.398194][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2629.398194][   T72]      __sys_connect+0x217/0x2a0
[ 2629.398194][   T72]      __x64_sys_connect+0x72/0xb0
[ 2629.398194][   T72]      do_syscall_64+0xc6/0x1e0
[ 2629.398194][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2629.398194][   T72] 
[ 2639.404698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2639.405269][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2639.405269][   T72]      netdev_get_by_index+0x5e/0x80
[ 2639.405269][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2639.405269][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2639.405269][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2639.405269][   T72]      ipv6_add_addr+0x411/0x2000
[ 2639.405269][   T72]      inet6_addr_add+0x30e/0xa40
[ 2639.405269][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2639.405269][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.405269][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.405269][   T72]      netlink_unicast+0x449/0x710
[ 2639.405269][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.405269][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.405269][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.405269][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.405269][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.405269][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.405269][   T72] 
[ 2639.408670][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2639.408670][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2639.408670][   T72]      ipv6_find_idev+0x102/0x170
[ 2639.408670][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2639.408670][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.408670][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.408670][   T72]      netlink_unicast+0x449/0x710
[ 2639.408670][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.408670][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.408670][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.408670][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.408670][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.408670][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.408670][   T72] 
[ 2639.411220][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2639.411220][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2639.411220][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2639.411220][   T72]      ipv6_find_idev+0x102/0x170
[ 2639.411220][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2639.411220][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.411220][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.411220][   T72]      netlink_unicast+0x449/0x710
[ 2639.411220][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.411220][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.411220][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.411220][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.411220][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.411220][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.411220][   T72] 
[ 2639.414008][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2639.414453][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2639.414453][   T72]      netdev_get_by_index+0x5e/0x80
[ 2639.414453][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2639.414453][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2639.414453][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2639.414453][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2639.414453][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2639.414453][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2639.414453][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2639.414453][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2639.414453][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2639.414453][   T72]      vfs_write+0x9e5/0x10a0
[ 2639.414453][   T72]      ksys_write+0xf5/0x1e0
[ 2639.414453][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.414453][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.414453][   T72] 
[ 2639.417527][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2639.417527][   T72]      netdev_get_by_index+0x5e/0x80
[ 2639.417527][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2639.417527][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2639.417527][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2639.417527][   T72]      ipv6_add_addr+0x411/0x2000
[ 2639.417527][   T72]      inet6_addr_add+0x30e/0xa40
[ 2639.417527][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2639.417527][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.417527][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.417527][   T72]      netlink_unicast+0x449/0x710
[ 2639.417527][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.417527][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.417527][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.417527][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.417527][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.417527][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.417527][   T72] 
[ 2639.420822][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2639.420822][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2639.420822][   T72]      ipv6_find_idev+0x102/0x170
[ 2639.420822][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2639.420822][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.420822][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.420822][   T72]      netlink_unicast+0x449/0x710
[ 2639.420822][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.420822][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.420822][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.420822][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.420822][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.420822][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.420822][   T72] 
[ 2639.423969][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2639.423969][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2639.423969][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2639.423969][   T72]      ipv6_find_idev+0x102/0x170
[ 2639.423969][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2639.423969][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2639.423969][   T72]      netlink_rcv_skb+0x130/0x360
[ 2639.423969][   T72]      netlink_unicast+0x449/0x710
[ 2639.423969][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2639.423969][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2639.423969][   T72]      ___sys_sendmsg+0xee/0x170
[ 2639.423969][   T72]      __sys_sendmsg+0xcd/0x170
[ 2639.423969][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.423969][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.423969][   T72] 
[ 2639.426781][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2639.427171][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2639.427171][   T72]      dst_init+0x84/0x4a0
[ 2639.427171][   T72]      dst_alloc+0x97/0x150
[ 2639.427171][   T72]      ip6_dst_alloc+0x23/0x90
[ 2639.427171][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2639.427171][   T72]      ip6_pol_route+0x56f/0x840
[ 2639.427171][   T72]      fib6_rule_lookup+0x227/0x600
[ 2639.427171][   T72]      ip6_route_output_flags+0x251/0x460
[ 2639.427171][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2639.427171][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2639.427171][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2639.427171][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2639.427171][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2639.427171][   T72]      __sys_connect+0x217/0x2a0
[ 2639.427171][   T72]      __x64_sys_connect+0x72/0xb0
[ 2639.427171][   T72]      do_syscall_64+0xc6/0x1e0
[ 2639.427171][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2639.427171][   T72] 
[ 2649.516708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2649.517141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2649.517141][   T72]      netdev_get_by_index+0x5e/0x80
[ 2649.517141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2649.517141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2649.517141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2649.517141][   T72]      ipv6_add_addr+0x411/0x2000
[ 2649.517141][   T72]      inet6_addr_add+0x30e/0xa40
[ 2649.517141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2649.517141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.517141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.517141][   T72]      netlink_unicast+0x449/0x710
[ 2649.517141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.517141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.517141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.517141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.517141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.517141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.517141][   T72] 
[ 2649.519126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2649.519126][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2649.519126][   T72]      ipv6_find_idev+0x102/0x170
[ 2649.519126][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2649.519126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.519126][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.519126][   T72]      netlink_unicast+0x449/0x710
[ 2649.519126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.519126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.519126][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.519126][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.519126][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.519126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.519126][   T72] 
[ 2649.520636][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2649.520636][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2649.520636][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2649.520636][   T72]      ipv6_find_idev+0x102/0x170
[ 2649.520636][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2649.520636][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.520636][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.520636][   T72]      netlink_unicast+0x449/0x710
[ 2649.520636][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.520636][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.520636][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.520636][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.520636][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.520636][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.520636][   T72] 
[ 2649.522289][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2649.522558][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2649.522558][   T72]      netdev_get_by_index+0x5e/0x80
[ 2649.522558][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2649.522558][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2649.522558][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2649.522558][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2649.522558][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2649.522558][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2649.522558][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2649.522558][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2649.522558][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2649.522558][   T72]      vfs_write+0x9e5/0x10a0
[ 2649.522558][   T72]      ksys_write+0xf5/0x1e0
[ 2649.522558][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.522558][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.522558][   T72] 
[ 2649.524370][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2649.524370][   T72]      netdev_get_by_index+0x5e/0x80
[ 2649.524370][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2649.524370][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2649.524370][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2649.524370][   T72]      ipv6_add_addr+0x411/0x2000
[ 2649.524370][   T72]      inet6_addr_add+0x30e/0xa40
[ 2649.524370][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2649.524370][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.524370][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.524370][   T72]      netlink_unicast+0x449/0x710
[ 2649.524370][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.524370][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.524370][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.524370][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.524370][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.524370][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.524370][   T72] 
[ 2649.526320][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2649.526320][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2649.526320][   T72]      ipv6_find_idev+0x102/0x170
[ 2649.526320][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2649.526320][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.526320][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.526320][   T72]      netlink_unicast+0x449/0x710
[ 2649.526320][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.526320][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.526320][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.526320][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.526320][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.526320][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.526320][   T72] 
[ 2649.527840][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2649.527840][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2649.527840][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2649.527840][   T72]      ipv6_find_idev+0x102/0x170
[ 2649.527840][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2649.527840][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2649.527840][   T72]      netlink_rcv_skb+0x130/0x360
[ 2649.527840][   T72]      netlink_unicast+0x449/0x710
[ 2649.527840][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2649.527840][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2649.527840][   T72]      ___sys_sendmsg+0xee/0x170
[ 2649.527840][   T72]      __sys_sendmsg+0xcd/0x170
[ 2649.527840][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.527840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.527840][   T72] 
[ 2649.529486][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2649.529733][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2649.529733][   T72]      dst_init+0x84/0x4a0
[ 2649.529733][   T72]      dst_alloc+0x97/0x150
[ 2649.529733][   T72]      ip6_dst_alloc+0x23/0x90
[ 2649.529733][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2649.529733][   T72]      ip6_pol_route+0x56f/0x840
[ 2649.529733][   T72]      fib6_rule_lookup+0x227/0x600
[ 2649.529733][   T72]      ip6_route_output_flags+0x251/0x460
[ 2649.529733][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2649.529733][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2649.529733][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2649.529733][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2649.529733][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2649.529733][   T72]      __sys_connect+0x217/0x2a0
[ 2649.529733][   T72]      __x64_sys_connect+0x72/0xb0
[ 2649.529733][   T72]      do_syscall_64+0xc6/0x1e0
[ 2649.529733][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2649.529733][   T72] 
[ 2659.548702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2659.549133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2659.549133][   T72]      netdev_get_by_index+0x5e/0x80
[ 2659.549133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2659.549133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2659.549133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2659.549133][   T72]      ipv6_add_addr+0x411/0x2000
[ 2659.549133][   T72]      inet6_addr_add+0x30e/0xa40
[ 2659.549133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2659.549133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.549133][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.549133][   T72]      netlink_unicast+0x449/0x710
[ 2659.549133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.549133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.549133][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.549133][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.549133][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.549133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.549133][   T72] 
[ 2659.551105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2659.551105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2659.551105][   T72]      ipv6_find_idev+0x102/0x170
[ 2659.551105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2659.551105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.551105][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.551105][   T72]      netlink_unicast+0x449/0x710
[ 2659.551105][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.551105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.551105][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.551105][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.551105][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.551105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.551105][   T72] 
[ 2659.552620][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2659.552620][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2659.552620][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2659.552620][   T72]      ipv6_find_idev+0x102/0x170
[ 2659.552620][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2659.552620][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.552620][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.552620][   T72]      netlink_unicast+0x449/0x710
[ 2659.552620][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.552620][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.552620][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.552620][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.552620][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.552620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.552620][   T72] 
[ 2659.554276][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2659.554543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2659.554543][   T72]      netdev_get_by_index+0x5e/0x80
[ 2659.554543][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2659.554543][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2659.554543][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2659.554543][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2659.554543][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2659.554543][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2659.554543][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2659.554543][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2659.554543][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2659.554543][   T72]      vfs_write+0x9e5/0x10a0
[ 2659.554543][   T72]      ksys_write+0xf5/0x1e0
[ 2659.554543][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.554543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.554543][   T72] 
[ 2659.556394][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2659.556394][   T72]      netdev_get_by_index+0x5e/0x80
[ 2659.556394][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2659.556394][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2659.556394][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2659.556394][   T72]      ipv6_add_addr+0x411/0x2000
[ 2659.556394][   T72]      inet6_addr_add+0x30e/0xa40
[ 2659.556394][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2659.556394][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.556394][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.556394][   T72]      netlink_unicast+0x449/0x710
[ 2659.556394][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.556394][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.556394][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.556394][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.556394][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.556394][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.556394][   T72] 
[ 2659.558360][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2659.558360][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2659.558360][   T72]      ipv6_find_idev+0x102/0x170
[ 2659.558360][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2659.558360][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.558360][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.558360][   T72]      netlink_unicast+0x449/0x710
[ 2659.558360][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.558360][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.558360][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.558360][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.558360][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.558360][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.558360][   T72] 
[ 2659.559888][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2659.559888][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2659.559888][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2659.559888][   T72]      ipv6_find_idev+0x102/0x170
[ 2659.559888][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2659.559888][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2659.559888][   T72]      netlink_rcv_skb+0x130/0x360
[ 2659.559888][   T72]      netlink_unicast+0x449/0x710
[ 2659.559888][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2659.559888][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2659.559888][   T72]      ___sys_sendmsg+0xee/0x170
[ 2659.559888][   T72]      __sys_sendmsg+0xcd/0x170
[ 2659.559888][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.559888][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.559888][   T72] 
[ 2659.561544][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2659.561790][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2659.561790][   T72]      dst_init+0x84/0x4a0
[ 2659.561790][   T72]      dst_alloc+0x97/0x150
[ 2659.561790][   T72]      ip6_dst_alloc+0x23/0x90
[ 2659.561790][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2659.561790][   T72]      ip6_pol_route+0x56f/0x840
[ 2659.561790][   T72]      fib6_rule_lookup+0x227/0x600
[ 2659.561790][   T72]      ip6_route_output_flags+0x251/0x460
[ 2659.561790][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2659.561790][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2659.561790][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2659.561790][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2659.561790][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2659.561790][   T72]      __sys_connect+0x217/0x2a0
[ 2659.561790][   T72]      __x64_sys_connect+0x72/0xb0
[ 2659.561790][   T72]      do_syscall_64+0xc6/0x1e0
[ 2659.561790][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2659.561790][   T72] 
[ 2669.812705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2669.813153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2669.813153][   T72]      netdev_get_by_index+0x5e/0x80
[ 2669.813153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2669.813153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2669.813153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2669.813153][   T72]      ipv6_add_addr+0x411/0x2000
[ 2669.813153][   T72]      inet6_addr_add+0x30e/0xa40
[ 2669.813153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2669.813153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.813153][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.813153][   T72]      netlink_unicast+0x449/0x710
[ 2669.813153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.813153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.813153][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.813153][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.813153][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.813153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.813153][   T72] 
[ 2669.815153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2669.815153][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2669.815153][   T72]      ipv6_find_idev+0x102/0x170
[ 2669.815153][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2669.815153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.815153][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.815153][   T72]      netlink_unicast+0x449/0x710
[ 2669.815153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.815153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.815153][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.815153][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.815153][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.815153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.815153][   T72] 
[ 2669.816681][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2669.816681][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2669.816681][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2669.816681][   T72]      ipv6_find_idev+0x102/0x170
[ 2669.816681][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2669.816681][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.816681][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.816681][   T72]      netlink_unicast+0x449/0x710
[ 2669.816681][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.816681][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.816681][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.816681][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.816681][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.816681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.816681][   T72] 
[ 2669.818408][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2669.818695][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2669.818695][   T72]      netdev_get_by_index+0x5e/0x80
[ 2669.818695][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2669.818695][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2669.818695][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2669.818695][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2669.818695][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2669.818695][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2669.818695][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2669.818695][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2669.818695][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2669.818695][   T72]      vfs_write+0x9e5/0x10a0
[ 2669.818695][   T72]      ksys_write+0xf5/0x1e0
[ 2669.818695][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.818695][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.818695][   T72] 
[ 2669.820693][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2669.820693][   T72]      netdev_get_by_index+0x5e/0x80
[ 2669.820693][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2669.820693][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2669.820693][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2669.820693][   T72]      ipv6_add_addr+0x411/0x2000
[ 2669.820693][   T72]      inet6_addr_add+0x30e/0xa40
[ 2669.820693][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2669.820693][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.820693][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.820693][   T72]      netlink_unicast+0x449/0x710
[ 2669.820693][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.820693][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.820693][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.820693][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.820693][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.820693][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.820693][   T72] 
[ 2669.823280][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2669.823280][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2669.823280][   T72]      ipv6_find_idev+0x102/0x170
[ 2669.823280][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2669.823280][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.823280][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.823280][   T72]      netlink_unicast+0x449/0x710
[ 2669.823280][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.823280][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.823280][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.823280][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.823280][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.823280][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.823280][   T72] 
[ 2669.825276][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2669.825276][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2669.825276][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2669.825276][   T72]      ipv6_find_idev+0x102/0x170
[ 2669.825276][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2669.825276][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2669.825276][   T72]      netlink_rcv_skb+0x130/0x360
[ 2669.825276][   T72]      netlink_unicast+0x449/0x710
[ 2669.825276][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2669.825276][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2669.825276][   T72]      ___sys_sendmsg+0xee/0x170
[ 2669.825276][   T72]      __sys_sendmsg+0xcd/0x170
[ 2669.825276][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.825276][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.825276][   T72] 
[ 2669.827471][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2669.827748][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2669.827748][   T72]      dst_init+0x84/0x4a0
[ 2669.827748][   T72]      dst_alloc+0x97/0x150
[ 2669.827748][   T72]      ip6_dst_alloc+0x23/0x90
[ 2669.827748][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2669.827748][   T72]      ip6_pol_route+0x56f/0x840
[ 2669.827748][   T72]      fib6_rule_lookup+0x227/0x600
[ 2669.827748][   T72]      ip6_route_output_flags+0x251/0x460
[ 2669.827748][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2669.827748][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2669.827748][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2669.827748][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2669.827748][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2669.827748][   T72]      __sys_connect+0x217/0x2a0
[ 2669.827748][   T72]      __x64_sys_connect+0x72/0xb0
[ 2669.827748][   T72]      do_syscall_64+0xc6/0x1e0
[ 2669.827748][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2669.827748][   T72] 
[ 2680.084735][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2680.085191][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2680.085191][   T72]      netdev_get_by_index+0x5e/0x80
[ 2680.085191][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2680.085191][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2680.085191][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2680.085191][   T72]      ipv6_add_addr+0x411/0x2000
[ 2680.085191][   T72]      inet6_addr_add+0x30e/0xa40
[ 2680.085191][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2680.085191][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.085191][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.085191][   T72]      netlink_unicast+0x449/0x710
[ 2680.085191][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.085191][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.085191][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.085191][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.085191][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.085191][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.085191][   T72] 
[ 2680.087177][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2680.087177][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2680.087177][   T72]      ipv6_find_idev+0x102/0x170
[ 2680.087177][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2680.087177][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.087177][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.087177][   T72]      netlink_unicast+0x449/0x710
[ 2680.087177][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.087177][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.087177][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.087177][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.087177][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.087177][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.087177][   T72] 
[ 2680.088720][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2680.088720][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2680.088720][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2680.088720][   T72]      ipv6_find_idev+0x102/0x170
[ 2680.088720][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2680.088720][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.088720][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.088720][   T72]      netlink_unicast+0x449/0x710
[ 2680.088720][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.088720][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.088720][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.088720][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.088720][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.088720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.088720][   T72] 
[ 2680.090381][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2680.090663][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2680.090663][   T72]      netdev_get_by_index+0x5e/0x80
[ 2680.090663][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2680.090663][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2680.090663][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2680.090663][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2680.090663][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2680.090663][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2680.090663][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2680.090663][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2680.090663][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2680.090663][   T72]      vfs_write+0x9e5/0x10a0
[ 2680.090663][   T72]      ksys_write+0xf5/0x1e0
[ 2680.090663][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.090663][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.090663][   T72] 
[ 2680.092489][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2680.092489][   T72]      netdev_get_by_index+0x5e/0x80
[ 2680.092489][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2680.092489][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2680.092489][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2680.092489][   T72]      ipv6_add_addr+0x411/0x2000
[ 2680.092489][   T72]      inet6_addr_add+0x30e/0xa40
[ 2680.092489][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2680.092489][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.092489][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.092489][   T72]      netlink_unicast+0x449/0x710
[ 2680.092489][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.092489][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.092489][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.092489][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.092489][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.092489][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.092489][   T72] 
[ 2680.094466][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2680.094466][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2680.094466][   T72]      ipv6_find_idev+0x102/0x170
[ 2680.094466][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2680.094466][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.094466][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.094466][   T72]      netlink_unicast+0x449/0x710
[ 2680.094466][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.094466][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.094466][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.094466][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.094466][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.094466][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.094466][   T72] 
[ 2680.095986][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2680.095986][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2680.095986][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2680.095986][   T72]      ipv6_find_idev+0x102/0x170
[ 2680.095986][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2680.095986][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2680.095986][   T72]      netlink_rcv_skb+0x130/0x360
[ 2680.095986][   T72]      netlink_unicast+0x449/0x710
[ 2680.095986][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2680.095986][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2680.095986][   T72]      ___sys_sendmsg+0xee/0x170
[ 2680.095986][   T72]      __sys_sendmsg+0xcd/0x170
[ 2680.095986][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.095986][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.095986][   T72] 
[ 2680.097651][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2680.097885][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2680.097885][   T72]      dst_init+0x84/0x4a0
[ 2680.097885][   T72]      dst_alloc+0x97/0x150
[ 2680.097885][   T72]      ip6_dst_alloc+0x23/0x90
[ 2680.097885][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2680.097885][   T72]      ip6_pol_route+0x56f/0x840
[ 2680.097885][   T72]      fib6_rule_lookup+0x227/0x600
[ 2680.097885][   T72]      ip6_route_output_flags+0x251/0x460
[ 2680.097885][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2680.097885][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2680.097885][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2680.097885][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2680.097885][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2680.097885][   T72]      __sys_connect+0x217/0x2a0
[ 2680.097885][   T72]      __x64_sys_connect+0x72/0xb0
[ 2680.097885][   T72]      do_syscall_64+0xc6/0x1e0
[ 2680.097885][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2680.097885][   T72] 
[ 2690.348703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2690.349080][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2690.349080][   T72]      netdev_get_by_index+0x5e/0x80
[ 2690.349080][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2690.349080][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2690.349080][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2690.349080][   T72]      ipv6_add_addr+0x411/0x2000
[ 2690.349080][   T72]      inet6_addr_add+0x30e/0xa40
[ 2690.349080][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2690.349080][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.349080][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.349080][   T72]      netlink_unicast+0x449/0x710
[ 2690.349080][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.349080][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.349080][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.349080][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.349080][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.349080][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.349080][   T72] 
[ 2690.351060][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2690.351060][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2690.351060][   T72]      ipv6_find_idev+0x102/0x170
[ 2690.351060][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2690.351060][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.351060][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.351060][   T72]      netlink_unicast+0x449/0x710
[ 2690.351060][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.351060][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.351060][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.351060][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.351060][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.351060][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.351060][   T72] 
[ 2690.352570][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2690.352570][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2690.352570][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2690.352570][   T72]      ipv6_find_idev+0x102/0x170
[ 2690.352570][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2690.352570][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.352570][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.352570][   T72]      netlink_unicast+0x449/0x710
[ 2690.352570][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.352570][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.352570][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.352570][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.352570][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.352570][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.352570][   T72] 
[ 2690.354283][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2690.354552][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2690.354552][   T72]      netdev_get_by_index+0x5e/0x80
[ 2690.354552][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2690.354552][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2690.354552][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2690.354552][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2690.354552][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2690.354552][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2690.354552][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2690.354552][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2690.354552][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2690.354552][   T72]      vfs_write+0x9e5/0x10a0
[ 2690.354552][   T72]      ksys_write+0xf5/0x1e0
[ 2690.354552][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.354552][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.354552][   T72] 
[ 2690.356363][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2690.356363][   T72]      netdev_get_by_index+0x5e/0x80
[ 2690.356363][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2690.356363][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2690.356363][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2690.356363][   T72]      ipv6_add_addr+0x411/0x2000
[ 2690.356363][   T72]      inet6_addr_add+0x30e/0xa40
[ 2690.356363][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2690.356363][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.356363][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.356363][   T72]      netlink_unicast+0x449/0x710
[ 2690.356363][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.356363][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.356363][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.356363][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.356363][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.356363][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.356363][   T72] 
[ 2690.358341][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2690.358341][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2690.358341][   T72]      ipv6_find_idev+0x102/0x170
[ 2690.358341][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2690.358341][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.358341][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.358341][   T72]      netlink_unicast+0x449/0x710
[ 2690.358341][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.358341][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.358341][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.358341][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.358341][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.358341][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.358341][   T72] 
[ 2690.359847][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2690.359847][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2690.359847][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2690.359847][   T72]      ipv6_find_idev+0x102/0x170
[ 2690.359847][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2690.359847][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2690.359847][   T72]      netlink_rcv_skb+0x130/0x360
[ 2690.359847][   T72]      netlink_unicast+0x449/0x710
[ 2690.359847][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2690.359847][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2690.359847][   T72]      ___sys_sendmsg+0xee/0x170
[ 2690.359847][   T72]      __sys_sendmsg+0xcd/0x170
[ 2690.359847][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.359847][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.359847][   T72] 
[ 2690.361490][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2690.361746][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2690.361746][   T72]      dst_init+0x84/0x4a0
[ 2690.361746][   T72]      dst_alloc+0x97/0x150
[ 2690.361746][   T72]      ip6_dst_alloc+0x23/0x90
[ 2690.361746][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2690.361746][   T72]      ip6_pol_route+0x56f/0x840
[ 2690.361746][   T72]      fib6_rule_lookup+0x227/0x600
[ 2690.361746][   T72]      ip6_route_output_flags+0x251/0x460
[ 2690.361746][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2690.361746][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2690.361746][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2690.361746][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2690.361746][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2690.361746][   T72]      __sys_connect+0x217/0x2a0
[ 2690.361746][   T72]      __x64_sys_connect+0x72/0xb0
[ 2690.361746][   T72]      do_syscall_64+0xc6/0x1e0
[ 2690.361746][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2690.361746][   T72] 
[ 2700.364701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2700.365149][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2700.365149][   T72]      netdev_get_by_index+0x5e/0x80
[ 2700.365149][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2700.365149][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2700.365149][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2700.365149][   T72]      ipv6_add_addr+0x411/0x2000
[ 2700.365149][   T72]      inet6_addr_add+0x30e/0xa40
[ 2700.365149][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2700.365149][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.365149][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.365149][   T72]      netlink_unicast+0x449/0x710
[ 2700.365149][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.365149][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.365149][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.365149][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.365149][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.365149][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.365149][   T72] 
[ 2700.367148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2700.367148][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2700.367148][   T72]      ipv6_find_idev+0x102/0x170
[ 2700.367148][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2700.367148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.367148][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.367148][   T72]      netlink_unicast+0x449/0x710
[ 2700.367148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.367148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.367148][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.367148][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.367148][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.367148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.367148][   T72] 
[ 2700.368695][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2700.368695][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2700.368695][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2700.368695][   T72]      ipv6_find_idev+0x102/0x170
[ 2700.368695][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2700.368695][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.368695][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.368695][   T72]      netlink_unicast+0x449/0x710
[ 2700.368695][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.368695][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.368695][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.368695][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.368695][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.368695][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.368695][   T72] 
[ 2700.370388][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2700.370676][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2700.370676][   T72]      netdev_get_by_index+0x5e/0x80
[ 2700.370676][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2700.370676][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2700.370676][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2700.370676][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2700.370676][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2700.370676][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2700.370676][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2700.370676][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2700.370676][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2700.370676][   T72]      vfs_write+0x9e5/0x10a0
[ 2700.370676][   T72]      ksys_write+0xf5/0x1e0
[ 2700.370676][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.370676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.370676][   T72] 
[ 2700.372517][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2700.372517][   T72]      netdev_get_by_index+0x5e/0x80
[ 2700.372517][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2700.372517][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2700.372517][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2700.372517][   T72]      ipv6_add_addr+0x411/0x2000
[ 2700.372517][   T72]      inet6_addr_add+0x30e/0xa40
[ 2700.372517][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2700.372517][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.372517][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.372517][   T72]      netlink_unicast+0x449/0x710
[ 2700.372517][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.372517][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.372517][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.372517][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.372517][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.372517][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.372517][   T72] 
[ 2700.374511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2700.374511][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2700.374511][   T72]      ipv6_find_idev+0x102/0x170
[ 2700.374511][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2700.374511][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.374511][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.374511][   T72]      netlink_unicast+0x449/0x710
[ 2700.374511][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.374511][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.374511][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.374511][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.374511][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.374511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.374511][   T72] 
[ 2700.376045][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2700.376045][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2700.376045][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2700.376045][   T72]      ipv6_find_idev+0x102/0x170
[ 2700.376045][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2700.376045][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2700.376045][   T72]      netlink_rcv_skb+0x130/0x360
[ 2700.376045][   T72]      netlink_unicast+0x449/0x710
[ 2700.376045][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2700.376045][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2700.376045][   T72]      ___sys_sendmsg+0xee/0x170
[ 2700.376045][   T72]      __sys_sendmsg+0xcd/0x170
[ 2700.376045][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.376045][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.376045][   T72] 
[ 2700.377728][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2700.377970][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2700.377970][   T72]      dst_init+0x84/0x4a0
[ 2700.377970][   T72]      dst_alloc+0x97/0x150
[ 2700.377970][   T72]      ip6_dst_alloc+0x23/0x90
[ 2700.377970][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2700.377970][   T72]      ip6_pol_route+0x56f/0x840
[ 2700.377970][   T72]      fib6_rule_lookup+0x227/0x600
[ 2700.377970][   T72]      ip6_route_output_flags+0x251/0x460
[ 2700.377970][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2700.377970][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2700.377970][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2700.377970][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2700.377970][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2700.377970][   T72]      __sys_connect+0x217/0x2a0
[ 2700.377970][   T72]      __x64_sys_connect+0x72/0xb0
[ 2700.377970][   T72]      do_syscall_64+0xc6/0x1e0
[ 2700.377970][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2700.377970][   T72] 
[ 2710.620714][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2710.621164][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2710.621164][   T72]      netdev_get_by_index+0x5e/0x80
[ 2710.621164][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2710.621164][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2710.621164][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2710.621164][   T72]      ipv6_add_addr+0x411/0x2000
[ 2710.621164][   T72]      inet6_addr_add+0x30e/0xa40
[ 2710.621164][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2710.621164][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.621164][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.621164][   T72]      netlink_unicast+0x449/0x710
[ 2710.621164][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.621164][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.621164][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.621164][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.621164][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.621164][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.621164][   T72] 
[ 2710.623137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2710.623137][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2710.623137][   T72]      ipv6_find_idev+0x102/0x170
[ 2710.623137][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2710.623137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.623137][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.623137][   T72]      netlink_unicast+0x449/0x710
[ 2710.623137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.623137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.623137][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.623137][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.623137][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.623137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.623137][   T72] 
[ 2710.624661][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2710.624661][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2710.624661][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2710.624661][   T72]      ipv6_find_idev+0x102/0x170
[ 2710.624661][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2710.624661][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.624661][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.624661][   T72]      netlink_unicast+0x449/0x710
[ 2710.624661][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.624661][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.624661][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.624661][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.624661][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.624661][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.624661][   T72] 
[ 2710.626346][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2710.626620][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2710.626620][   T72]      netdev_get_by_index+0x5e/0x80
[ 2710.626620][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2710.626620][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2710.626620][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2710.626620][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2710.626620][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2710.626620][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2710.626620][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2710.626620][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2710.626620][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2710.626620][   T72]      vfs_write+0x9e5/0x10a0
[ 2710.626620][   T72]      ksys_write+0xf5/0x1e0
[ 2710.626620][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.626620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.626620][   T72] 
[ 2710.628456][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2710.628456][   T72]      netdev_get_by_index+0x5e/0x80
[ 2710.628456][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2710.628456][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2710.628456][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2710.628456][   T72]      ipv6_add_addr+0x411/0x2000
[ 2710.628456][   T72]      inet6_addr_add+0x30e/0xa40
[ 2710.628456][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2710.628456][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.628456][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.628456][   T72]      netlink_unicast+0x449/0x710
[ 2710.628456][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.628456][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.628456][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.628456][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.628456][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.628456][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.628456][   T72] 
[ 2710.630434][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2710.630434][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2710.630434][   T72]      ipv6_find_idev+0x102/0x170
[ 2710.630434][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2710.630434][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.630434][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.630434][   T72]      netlink_unicast+0x449/0x710
[ 2710.630434][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.630434][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.630434][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.630434][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.630434][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.630434][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.630434][   T72] 
[ 2710.631957][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2710.631957][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2710.631957][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2710.631957][   T72]      ipv6_find_idev+0x102/0x170
[ 2710.631957][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2710.631957][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2710.631957][   T72]      netlink_rcv_skb+0x130/0x360
[ 2710.631957][   T72]      netlink_unicast+0x449/0x710
[ 2710.631957][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2710.631957][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2710.631957][   T72]      ___sys_sendmsg+0xee/0x170
[ 2710.631957][   T72]      __sys_sendmsg+0xcd/0x170
[ 2710.631957][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.631957][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.631957][   T72] 
[ 2710.633627][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2710.633861][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2710.633861][   T72]      dst_init+0x84/0x4a0
[ 2710.633861][   T72]      dst_alloc+0x97/0x150
[ 2710.633861][   T72]      ip6_dst_alloc+0x23/0x90
[ 2710.633861][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2710.633861][   T72]      ip6_pol_route+0x56f/0x840
[ 2710.633861][   T72]      fib6_rule_lookup+0x227/0x600
[ 2710.633861][   T72]      ip6_route_output_flags+0x251/0x460
[ 2710.633861][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2710.633861][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2710.633861][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2710.633861][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2710.633861][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2710.633861][   T72]      __sys_connect+0x217/0x2a0
[ 2710.633861][   T72]      __x64_sys_connect+0x72/0xb0
[ 2710.633861][   T72]      do_syscall_64+0xc6/0x1e0
[ 2710.633861][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2710.633861][   T72] 
[ 2720.876725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2720.877152][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2720.877152][   T72]      netdev_get_by_index+0x5e/0x80
[ 2720.877152][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2720.877152][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2720.877152][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2720.877152][   T72]      ipv6_add_addr+0x411/0x2000
[ 2720.877152][   T72]      inet6_addr_add+0x30e/0xa40
[ 2720.877152][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2720.877152][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.877152][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.877152][   T72]      netlink_unicast+0x449/0x710
[ 2720.877152][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.877152][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.877152][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.877152][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.877152][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.877152][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.877152][   T72] 
[ 2720.879291][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2720.879291][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2720.879291][   T72]      ipv6_find_idev+0x102/0x170
[ 2720.879291][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2720.879291][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.879291][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.879291][   T72]      netlink_unicast+0x449/0x710
[ 2720.879291][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.879291][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.879291][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.879291][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.879291][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.879291][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.879291][   T72] 
[ 2720.880856][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2720.880856][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2720.880856][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2720.880856][   T72]      ipv6_find_idev+0x102/0x170
[ 2720.880856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2720.880856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.880856][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.880856][   T72]      netlink_unicast+0x449/0x710
[ 2720.880856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.880856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.880856][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.880856][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.880856][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.880856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.880856][   T72] 
[ 2720.882527][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2720.882804][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2720.882804][   T72]      netdev_get_by_index+0x5e/0x80
[ 2720.882804][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2720.882804][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2720.882804][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2720.882804][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2720.882804][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2720.882804][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2720.882804][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2720.882804][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2720.882804][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2720.882804][   T72]      vfs_write+0x9e5/0x10a0
[ 2720.882804][   T72]      ksys_write+0xf5/0x1e0
[ 2720.882804][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.882804][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.882804][   T72] 
[ 2720.884629][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2720.884629][   T72]      netdev_get_by_index+0x5e/0x80
[ 2720.884629][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2720.884629][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2720.884629][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2720.884629][   T72]      ipv6_add_addr+0x411/0x2000
[ 2720.884629][   T72]      inet6_addr_add+0x30e/0xa40
[ 2720.884629][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2720.884629][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.884629][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.884629][   T72]      netlink_unicast+0x449/0x710
[ 2720.884629][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.884629][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.884629][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.884629][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.884629][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.884629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.884629][   T72] 
[ 2720.886588][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2720.886588][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2720.886588][   T72]      ipv6_find_idev+0x102/0x170
[ 2720.886588][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2720.886588][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.886588][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.886588][   T72]      netlink_unicast+0x449/0x710
[ 2720.886588][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.886588][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.886588][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.886588][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.886588][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.886588][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.886588][   T72] 
[ 2720.888108][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2720.888108][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2720.888108][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2720.888108][   T72]      ipv6_find_idev+0x102/0x170
[ 2720.888108][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2720.888108][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2720.888108][   T72]      netlink_rcv_skb+0x130/0x360
[ 2720.888108][   T72]      netlink_unicast+0x449/0x710
[ 2720.888108][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2720.888108][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2720.888108][   T72]      ___sys_sendmsg+0xee/0x170
[ 2720.888108][   T72]      __sys_sendmsg+0xcd/0x170
[ 2720.888108][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.888108][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.888108][   T72] 
[ 2720.889764][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2720.890010][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2720.890010][   T72]      dst_init+0x84/0x4a0
[ 2720.890010][   T72]      dst_alloc+0x97/0x150
[ 2720.890010][   T72]      ip6_dst_alloc+0x23/0x90
[ 2720.890010][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2720.890010][   T72]      ip6_pol_route+0x56f/0x840
[ 2720.890010][   T72]      fib6_rule_lookup+0x227/0x600
[ 2720.890010][   T72]      ip6_route_output_flags+0x251/0x460
[ 2720.890010][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2720.890010][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2720.890010][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2720.890010][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2720.890010][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2720.890010][   T72]      __sys_connect+0x217/0x2a0
[ 2720.890010][   T72]      __x64_sys_connect+0x72/0xb0
[ 2720.890010][   T72]      do_syscall_64+0xc6/0x1e0
[ 2720.890010][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2720.890010][   T72] 
[ 2731.132696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2731.133157][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2731.133157][   T72]      netdev_get_by_index+0x5e/0x80
[ 2731.133157][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2731.133157][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2731.133157][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2731.133157][   T72]      ipv6_add_addr+0x411/0x2000
[ 2731.133157][   T72]      inet6_addr_add+0x30e/0xa40
[ 2731.133157][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2731.133157][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.133157][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.133157][   T72]      netlink_unicast+0x449/0x710
[ 2731.133157][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.133157][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.133157][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.133157][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.133157][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.133157][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.133157][   T72] 
[ 2731.135133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2731.135133][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2731.135133][   T72]      ipv6_find_idev+0x102/0x170
[ 2731.135133][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2731.135133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.135133][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.135133][   T72]      netlink_unicast+0x449/0x710
[ 2731.135133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.135133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.135133][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.135133][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.135133][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.135133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.135133][   T72] 
[ 2731.136645][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2731.136645][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2731.136645][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2731.136645][   T72]      ipv6_find_idev+0x102/0x170
[ 2731.136645][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2731.136645][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.136645][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.136645][   T72]      netlink_unicast+0x449/0x710
[ 2731.136645][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.136645][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.136645][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.136645][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.136645][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.136645][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.136645][   T72] 
[ 2731.139374][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2731.139855][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2731.139855][   T72]      netdev_get_by_index+0x5e/0x80
[ 2731.139855][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2731.139855][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2731.139855][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2731.139855][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2731.139855][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2731.139855][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2731.139855][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2731.139855][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2731.139855][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2731.139855][   T72]      vfs_write+0x9e5/0x10a0
[ 2731.139855][   T72]      ksys_write+0xf5/0x1e0
[ 2731.139855][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.139855][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.139855][   T72] 
[ 2731.142863][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2731.142863][   T72]      netdev_get_by_index+0x5e/0x80
[ 2731.142863][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2731.142863][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2731.142863][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2731.142863][   T72]      ipv6_add_addr+0x411/0x2000
[ 2731.142863][   T72]      inet6_addr_add+0x30e/0xa40
[ 2731.142863][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2731.142863][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.142863][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.142863][   T72]      netlink_unicast+0x449/0x710
[ 2731.142863][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.142863][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.142863][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.142863][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.142863][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.142863][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.142863][   T72] 
[ 2731.146124][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2731.146124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2731.146124][   T72]      ipv6_find_idev+0x102/0x170
[ 2731.146124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2731.146124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.146124][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.146124][   T72]      netlink_unicast+0x449/0x710
[ 2731.146124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.146124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.146124][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.146124][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.146124][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.146124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.146124][   T72] 
[ 2731.148660][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2731.148660][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2731.148660][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2731.148660][   T72]      ipv6_find_idev+0x102/0x170
[ 2731.148660][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2731.148660][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2731.148660][   T72]      netlink_rcv_skb+0x130/0x360
[ 2731.148660][   T72]      netlink_unicast+0x449/0x710
[ 2731.148660][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2731.148660][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2731.148660][   T72]      ___sys_sendmsg+0xee/0x170
[ 2731.148660][   T72]      __sys_sendmsg+0xcd/0x170
[ 2731.148660][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.148660][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.148660][   T72] 
[ 2731.151421][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2731.151856][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2731.151856][   T72]      dst_init+0x84/0x4a0
[ 2731.151856][   T72]      dst_alloc+0x97/0x150
[ 2731.151856][   T72]      ip6_dst_alloc+0x23/0x90
[ 2731.151856][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2731.151856][   T72]      ip6_pol_route+0x56f/0x840
[ 2731.151856][   T72]      fib6_rule_lookup+0x227/0x600
[ 2731.151856][   T72]      ip6_route_output_flags+0x251/0x460
[ 2731.151856][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2731.151856][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2731.151856][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2731.151856][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2731.151856][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2731.151856][   T72]      __sys_connect+0x217/0x2a0
[ 2731.151856][   T72]      __x64_sys_connect+0x72/0xb0
[ 2731.151856][   T72]      do_syscall_64+0xc6/0x1e0
[ 2731.151856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2731.151856][   T72] 
[ 2741.396727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2741.397172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2741.397172][   T72]      netdev_get_by_index+0x5e/0x80
[ 2741.397172][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2741.397172][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2741.397172][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2741.397172][   T72]      ipv6_add_addr+0x411/0x2000
[ 2741.397172][   T72]      inet6_addr_add+0x30e/0xa40
[ 2741.397172][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2741.397172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.397172][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.397172][   T72]      netlink_unicast+0x449/0x710
[ 2741.397172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.397172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.397172][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.397172][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.397172][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.397172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.397172][   T72] 
[ 2741.399212][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2741.399212][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2741.399212][   T72]      ipv6_find_idev+0x102/0x170
[ 2741.399212][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2741.399212][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.399212][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.399212][   T72]      netlink_unicast+0x449/0x710
[ 2741.399212][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.399212][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.399212][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.399212][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.399212][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.399212][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.399212][   T72] 
[ 2741.400758][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2741.400758][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2741.400758][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2741.400758][   T72]      ipv6_find_idev+0x102/0x170
[ 2741.400758][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2741.400758][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.400758][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.400758][   T72]      netlink_unicast+0x449/0x710
[ 2741.400758][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.400758][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.400758][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.400758][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.400758][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.400758][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.400758][   T72] 
[ 2741.402462][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2741.402752][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2741.402752][   T72]      netdev_get_by_index+0x5e/0x80
[ 2741.402752][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2741.402752][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2741.402752][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2741.402752][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2741.402752][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2741.402752][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2741.402752][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2741.402752][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2741.402752][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2741.402752][   T72]      vfs_write+0x9e5/0x10a0
[ 2741.402752][   T72]      ksys_write+0xf5/0x1e0
[ 2741.402752][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.402752][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.402752][   T72] 
[ 2741.404610][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2741.404610][   T72]      netdev_get_by_index+0x5e/0x80
[ 2741.404610][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2741.404610][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2741.404610][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2741.404610][   T72]      ipv6_add_addr+0x411/0x2000
[ 2741.404610][   T72]      inet6_addr_add+0x30e/0xa40
[ 2741.404610][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2741.404610][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.404610][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.404610][   T72]      netlink_unicast+0x449/0x710
[ 2741.404610][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.404610][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.404610][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.404610][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.404610][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.404610][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.404610][   T72] 
[ 2741.406606][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2741.406606][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2741.406606][   T72]      ipv6_find_idev+0x102/0x170
[ 2741.406606][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2741.406606][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.406606][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.406606][   T72]      netlink_unicast+0x449/0x710
[ 2741.406606][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.406606][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.406606][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.406606][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.406606][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.406606][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.406606][   T72] 
[ 2741.408159][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2741.408159][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2741.408159][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2741.408159][   T72]      ipv6_find_idev+0x102/0x170
[ 2741.408159][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2741.408159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2741.408159][   T72]      netlink_rcv_skb+0x130/0x360
[ 2741.408159][   T72]      netlink_unicast+0x449/0x710
[ 2741.408159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2741.408159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2741.408159][   T72]      ___sys_sendmsg+0xee/0x170
[ 2741.408159][   T72]      __sys_sendmsg+0xcd/0x170
[ 2741.408159][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.408159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.408159][   T72] 
[ 2741.409863][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2741.410102][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2741.410102][   T72]      dst_init+0x84/0x4a0
[ 2741.410102][   T72]      dst_alloc+0x97/0x150
[ 2741.410102][   T72]      ip6_dst_alloc+0x23/0x90
[ 2741.410102][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2741.410102][   T72]      ip6_pol_route+0x56f/0x840
[ 2741.410102][   T72]      fib6_rule_lookup+0x227/0x600
[ 2741.410102][   T72]      ip6_route_output_flags+0x251/0x460
[ 2741.410102][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2741.410102][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2741.410102][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2741.410102][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2741.410102][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2741.410102][   T72]      __sys_connect+0x217/0x2a0
[ 2741.410102][   T72]      __x64_sys_connect+0x72/0xb0
[ 2741.410102][   T72]      do_syscall_64+0xc6/0x1e0
[ 2741.410102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2741.410102][   T72] 
[ 2751.652711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2751.653125][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2751.653125][   T72]      netdev_get_by_index+0x5e/0x80
[ 2751.653125][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2751.653125][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2751.653125][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2751.653125][   T72]      ipv6_add_addr+0x411/0x2000
[ 2751.653125][   T72]      inet6_addr_add+0x30e/0xa40
[ 2751.653125][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2751.653125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.653125][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.653125][   T72]      netlink_unicast+0x449/0x710
[ 2751.653125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.653125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.653125][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.653125][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.653125][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.653125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.653125][   T72] 
[ 2751.655130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2751.655130][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2751.655130][   T72]      ipv6_find_idev+0x102/0x170
[ 2751.655130][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2751.655130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.655130][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.655130][   T72]      netlink_unicast+0x449/0x710
[ 2751.655130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.655130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.655130][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.655130][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.655130][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.655130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.655130][   T72] 
[ 2751.656674][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2751.656674][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2751.656674][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2751.656674][   T72]      ipv6_find_idev+0x102/0x170
[ 2751.656674][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2751.656674][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.656674][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.656674][   T72]      netlink_unicast+0x449/0x710
[ 2751.656674][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.656674][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.656674][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.656674][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.656674][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.656674][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.656674][   T72] 
[ 2751.658387][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2751.658760][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2751.658760][   T72]      netdev_get_by_index+0x5e/0x80
[ 2751.658760][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2751.658760][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2751.658760][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2751.658760][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2751.658760][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2751.658760][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2751.658760][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2751.658760][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2751.658760][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2751.658760][   T72]      vfs_write+0x9e5/0x10a0
[ 2751.658760][   T72]      ksys_write+0xf5/0x1e0
[ 2751.658760][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.658760][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.658760][   T72] 
[ 2751.660618][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2751.660618][   T72]      netdev_get_by_index+0x5e/0x80
[ 2751.660618][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2751.660618][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2751.660618][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2751.660618][   T72]      ipv6_add_addr+0x411/0x2000
[ 2751.660618][   T72]      inet6_addr_add+0x30e/0xa40
[ 2751.660618][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2751.660618][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.660618][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.660618][   T72]      netlink_unicast+0x449/0x710
[ 2751.660618][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.660618][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.660618][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.660618][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.660618][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.660618][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.660618][   T72] 
[ 2751.662604][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2751.662604][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2751.662604][   T72]      ipv6_find_idev+0x102/0x170
[ 2751.662604][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2751.662604][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.662604][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.662604][   T72]      netlink_unicast+0x449/0x710
[ 2751.662604][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.662604][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.662604][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.662604][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.662604][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.662604][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.662604][   T72] 
[ 2751.664139][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2751.664139][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2751.664139][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2751.664139][   T72]      ipv6_find_idev+0x102/0x170
[ 2751.664139][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2751.664139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2751.664139][   T72]      netlink_rcv_skb+0x130/0x360
[ 2751.664139][   T72]      netlink_unicast+0x449/0x710
[ 2751.664139][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2751.664139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2751.664139][   T72]      ___sys_sendmsg+0xee/0x170
[ 2751.664139][   T72]      __sys_sendmsg+0xcd/0x170
[ 2751.664139][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.664139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.664139][   T72] 
[ 2751.665815][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2751.666053][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2751.666053][   T72]      dst_init+0x84/0x4a0
[ 2751.666053][   T72]      dst_alloc+0x97/0x150
[ 2751.666053][   T72]      ip6_dst_alloc+0x23/0x90
[ 2751.666053][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2751.666053][   T72]      ip6_pol_route+0x56f/0x840
[ 2751.666053][   T72]      fib6_rule_lookup+0x227/0x600
[ 2751.666053][   T72]      ip6_route_output_flags+0x251/0x460
[ 2751.666053][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2751.666053][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2751.666053][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2751.666053][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2751.666053][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2751.666053][   T72]      __sys_connect+0x217/0x2a0
[ 2751.666053][   T72]      __x64_sys_connect+0x72/0xb0
[ 2751.666053][   T72]      do_syscall_64+0xc6/0x1e0
[ 2751.666053][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2751.666053][   T72] 
[ 2761.908702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2761.909153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2761.909153][   T72]      netdev_get_by_index+0x5e/0x80
[ 2761.909153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2761.909153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2761.909153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2761.909153][   T72]      ipv6_add_addr+0x411/0x2000
[ 2761.909153][   T72]      inet6_addr_add+0x30e/0xa40
[ 2761.909153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2761.909153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.909153][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.909153][   T72]      netlink_unicast+0x449/0x710
[ 2761.909153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.909153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.909153][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.909153][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.909153][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.909153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.909153][   T72] 
[ 2761.911154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2761.911154][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2761.911154][   T72]      ipv6_find_idev+0x102/0x170
[ 2761.911154][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2761.911154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.911154][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.911154][   T72]      netlink_unicast+0x449/0x710
[ 2761.911154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.911154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.911154][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.911154][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.911154][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.911154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.911154][   T72] 
[ 2761.912685][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2761.912685][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2761.912685][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2761.912685][   T72]      ipv6_find_idev+0x102/0x170
[ 2761.912685][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2761.912685][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.912685][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.912685][   T72]      netlink_unicast+0x449/0x710
[ 2761.912685][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.912685][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.912685][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.912685][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.912685][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.912685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.912685][   T72] 
[ 2761.914373][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2761.914665][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2761.914665][   T72]      netdev_get_by_index+0x5e/0x80
[ 2761.914665][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2761.914665][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2761.914665][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2761.914665][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2761.914665][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2761.914665][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2761.914665][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2761.914665][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2761.914665][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2761.914665][   T72]      vfs_write+0x9e5/0x10a0
[ 2761.914665][   T72]      ksys_write+0xf5/0x1e0
[ 2761.914665][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.914665][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.914665][   T72] 
[ 2761.916516][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2761.916516][   T72]      netdev_get_by_index+0x5e/0x80
[ 2761.916516][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2761.916516][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2761.916516][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2761.916516][   T72]      ipv6_add_addr+0x411/0x2000
[ 2761.916516][   T72]      inet6_addr_add+0x30e/0xa40
[ 2761.916516][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2761.916516][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.916516][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.916516][   T72]      netlink_unicast+0x449/0x710
[ 2761.916516][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.916516][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.916516][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.916516][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.916516][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.916516][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.916516][   T72] 
[ 2761.918509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2761.918509][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2761.918509][   T72]      ipv6_find_idev+0x102/0x170
[ 2761.918509][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2761.918509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.918509][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.918509][   T72]      netlink_unicast+0x449/0x710
[ 2761.918509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.918509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.918509][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.918509][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.918509][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.918509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.918509][   T72] 
[ 2761.920041][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2761.920041][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2761.920041][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2761.920041][   T72]      ipv6_find_idev+0x102/0x170
[ 2761.920041][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2761.920041][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2761.920041][   T72]      netlink_rcv_skb+0x130/0x360
[ 2761.920041][   T72]      netlink_unicast+0x449/0x710
[ 2761.920041][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2761.920041][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2761.920041][   T72]      ___sys_sendmsg+0xee/0x170
[ 2761.920041][   T72]      __sys_sendmsg+0xcd/0x170
[ 2761.920041][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.920041][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.920041][   T72] 
[ 2761.921724][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2761.921966][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2761.921966][   T72]      dst_init+0x84/0x4a0
[ 2761.921966][   T72]      dst_alloc+0x97/0x150
[ 2761.921966][   T72]      ip6_dst_alloc+0x23/0x90
[ 2761.921966][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2761.921966][   T72]      ip6_pol_route+0x56f/0x840
[ 2761.921966][   T72]      fib6_rule_lookup+0x227/0x600
[ 2761.921966][   T72]      ip6_route_output_flags+0x251/0x460
[ 2761.921966][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2761.921966][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2761.921966][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2761.921966][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2761.921966][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2761.921966][   T72]      __sys_connect+0x217/0x2a0
[ 2761.921966][   T72]      __x64_sys_connect+0x72/0xb0
[ 2761.921966][   T72]      do_syscall_64+0xc6/0x1e0
[ 2761.921966][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2761.921966][   T72] 
[ 2772.164718][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2772.165174][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2772.165174][   T72]      netdev_get_by_index+0x5e/0x80
[ 2772.165174][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2772.165174][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2772.165174][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2772.165174][   T72]      ipv6_add_addr+0x411/0x2000
[ 2772.165174][   T72]      inet6_addr_add+0x30e/0xa40
[ 2772.165174][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2772.165174][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.165174][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.165174][   T72]      netlink_unicast+0x449/0x710
[ 2772.165174][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.165174][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.165174][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.165174][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.165174][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.165174][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.165174][   T72] 
[ 2772.167155][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2772.167155][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2772.167155][   T72]      ipv6_find_idev+0x102/0x170
[ 2772.167155][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2772.167155][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.167155][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.167155][   T72]      netlink_unicast+0x449/0x710
[ 2772.167155][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.167155][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.167155][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.167155][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.167155][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.167155][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.167155][   T72] 
[ 2772.168666][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2772.168666][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2772.168666][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2772.168666][   T72]      ipv6_find_idev+0x102/0x170
[ 2772.168666][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2772.168666][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.168666][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.168666][   T72]      netlink_unicast+0x449/0x710
[ 2772.168666][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.168666][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.168666][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.168666][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.168666][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.168666][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.168666][   T72] 
[ 2772.170333][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2772.170600][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2772.170600][   T72]      netdev_get_by_index+0x5e/0x80
[ 2772.170600][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2772.170600][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2772.170600][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2772.170600][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2772.170600][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2772.170600][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2772.170600][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2772.170600][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2772.170600][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2772.170600][   T72]      vfs_write+0x9e5/0x10a0
[ 2772.170600][   T72]      ksys_write+0xf5/0x1e0
[ 2772.170600][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.170600][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.170600][   T72] 
[ 2772.172412][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2772.172412][   T72]      netdev_get_by_index+0x5e/0x80
[ 2772.172412][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2772.172412][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2772.172412][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2772.172412][   T72]      ipv6_add_addr+0x411/0x2000
[ 2772.172412][   T72]      inet6_addr_add+0x30e/0xa40
[ 2772.172412][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2772.172412][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.172412][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.172412][   T72]      netlink_unicast+0x449/0x710
[ 2772.172412][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.172412][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.172412][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.172412][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.172412][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.172412][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.172412][   T72] 
[ 2772.174385][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2772.174385][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2772.174385][   T72]      ipv6_find_idev+0x102/0x170
[ 2772.174385][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2772.174385][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.174385][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.174385][   T72]      netlink_unicast+0x449/0x710
[ 2772.174385][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.174385][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.174385][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.174385][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.174385][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.174385][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.174385][   T72] 
[ 2772.175911][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2772.175911][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2772.175911][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2772.175911][   T72]      ipv6_find_idev+0x102/0x170
[ 2772.175911][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2772.175911][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2772.175911][   T72]      netlink_rcv_skb+0x130/0x360
[ 2772.175911][   T72]      netlink_unicast+0x449/0x710
[ 2772.175911][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2772.175911][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2772.175911][   T72]      ___sys_sendmsg+0xee/0x170
[ 2772.175911][   T72]      __sys_sendmsg+0xcd/0x170
[ 2772.175911][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.175911][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.175911][   T72] 
[ 2772.177603][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2772.177857][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2772.177857][   T72]      dst_init+0x84/0x4a0
[ 2772.177857][   T72]      dst_alloc+0x97/0x150
[ 2772.177857][   T72]      ip6_dst_alloc+0x23/0x90
[ 2772.177857][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2772.177857][   T72]      ip6_pol_route+0x56f/0x840
[ 2772.177857][   T72]      fib6_rule_lookup+0x227/0x600
[ 2772.177857][   T72]      ip6_route_output_flags+0x251/0x460
[ 2772.177857][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2772.177857][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2772.177857][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2772.177857][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2772.177857][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2772.177857][   T72]      __sys_connect+0x217/0x2a0
[ 2772.177857][   T72]      __x64_sys_connect+0x72/0xb0
[ 2772.177857][   T72]      do_syscall_64+0xc6/0x1e0
[ 2772.177857][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2772.177857][   T72] 
[ 2782.420692][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2782.421141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2782.421141][   T72]      netdev_get_by_index+0x5e/0x80
[ 2782.421141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2782.421141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2782.421141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2782.421141][   T72]      ipv6_add_addr+0x411/0x2000
[ 2782.421141][   T72]      inet6_addr_add+0x30e/0xa40
[ 2782.421141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2782.421141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.421141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.421141][   T72]      netlink_unicast+0x449/0x710
[ 2782.421141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.421141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.421141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.421141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.421141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.421141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.421141][   T72] 
[ 2782.423126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2782.423126][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2782.423126][   T72]      ipv6_find_idev+0x102/0x170
[ 2782.423126][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2782.423126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.423126][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.423126][   T72]      netlink_unicast+0x449/0x710
[ 2782.423126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.423126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.423126][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.423126][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.423126][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.423126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.423126][   T72] 
[ 2782.424651][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2782.424651][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2782.424651][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2782.424651][   T72]      ipv6_find_idev+0x102/0x170
[ 2782.424651][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2782.424651][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.424651][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.424651][   T72]      netlink_unicast+0x449/0x710
[ 2782.424651][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.424651][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.424651][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.424651][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.424651][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.424651][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.424651][   T72] 
[ 2782.426306][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2782.426572][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2782.426572][   T72]      netdev_get_by_index+0x5e/0x80
[ 2782.426572][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2782.426572][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2782.426572][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2782.426572][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2782.426572][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2782.426572][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2782.426572][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2782.426572][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2782.426572][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2782.426572][   T72]      vfs_write+0x9e5/0x10a0
[ 2782.426572][   T72]      ksys_write+0xf5/0x1e0
[ 2782.426572][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.426572][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.426572][   T72] 
[ 2782.428398][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2782.428398][   T72]      netdev_get_by_index+0x5e/0x80
[ 2782.428398][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2782.428398][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2782.428398][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2782.428398][   T72]      ipv6_add_addr+0x411/0x2000
[ 2782.428398][   T72]      inet6_addr_add+0x30e/0xa40
[ 2782.428398][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2782.428398][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.428398][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.428398][   T72]      netlink_unicast+0x449/0x710
[ 2782.428398][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.428398][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.428398][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.428398][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.428398][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.428398][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.428398][   T72] 
[ 2782.430360][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2782.430360][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2782.430360][   T72]      ipv6_find_idev+0x102/0x170
[ 2782.430360][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2782.430360][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.430360][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.430360][   T72]      netlink_unicast+0x449/0x710
[ 2782.430360][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.430360][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.430360][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.430360][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.430360][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.430360][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.430360][   T72] 
[ 2782.431871][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2782.431871][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2782.431871][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2782.431871][   T72]      ipv6_find_idev+0x102/0x170
[ 2782.431871][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2782.431871][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2782.431871][   T72]      netlink_rcv_skb+0x130/0x360
[ 2782.431871][   T72]      netlink_unicast+0x449/0x710
[ 2782.431871][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2782.431871][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2782.431871][   T72]      ___sys_sendmsg+0xee/0x170
[ 2782.431871][   T72]      __sys_sendmsg+0xcd/0x170
[ 2782.431871][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.431871][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.431871][   T72] 
[ 2782.433522][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2782.433775][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2782.433775][   T72]      dst_init+0x84/0x4a0
[ 2782.433775][   T72]      dst_alloc+0x97/0x150
[ 2782.433775][   T72]      ip6_dst_alloc+0x23/0x90
[ 2782.433775][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2782.433775][   T72]      ip6_pol_route+0x56f/0x840
[ 2782.433775][   T72]      fib6_rule_lookup+0x227/0x600
[ 2782.433775][   T72]      ip6_route_output_flags+0x251/0x460
[ 2782.433775][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2782.433775][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2782.433775][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2782.433775][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2782.433775][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2782.433775][   T72]      __sys_connect+0x217/0x2a0
[ 2782.433775][   T72]      __x64_sys_connect+0x72/0xb0
[ 2782.433775][   T72]      do_syscall_64+0xc6/0x1e0
[ 2782.433775][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2782.433775][   T72] 
[ 2792.676699][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2792.677134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2792.677134][   T72]      netdev_get_by_index+0x5e/0x80
[ 2792.677134][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2792.677134][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2792.677134][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2792.677134][   T72]      ipv6_add_addr+0x411/0x2000
[ 2792.677134][   T72]      inet6_addr_add+0x30e/0xa40
[ 2792.677134][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2792.677134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.677134][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.677134][   T72]      netlink_unicast+0x449/0x710
[ 2792.677134][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.677134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.677134][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.677134][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.677134][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.677134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.677134][   T72] 
[ 2792.679108][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2792.679108][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2792.679108][   T72]      ipv6_find_idev+0x102/0x170
[ 2792.679108][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2792.679108][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.679108][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.679108][   T72]      netlink_unicast+0x449/0x710
[ 2792.679108][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.679108][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.679108][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.679108][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.679108][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.679108][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.679108][   T72] 
[ 2792.680620][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2792.680620][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2792.680620][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2792.680620][   T72]      ipv6_find_idev+0x102/0x170
[ 2792.680620][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2792.680620][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.680620][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.680620][   T72]      netlink_unicast+0x449/0x710
[ 2792.680620][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.680620][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.680620][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.680620][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.680620][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.680620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.680620][   T72] 
[ 2792.682377][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2792.682744][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2792.682744][   T72]      netdev_get_by_index+0x5e/0x80
[ 2792.682744][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2792.682744][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2792.682744][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2792.682744][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2792.682744][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2792.682744][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2792.682744][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2792.682744][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2792.682744][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2792.682744][   T72]      vfs_write+0x9e5/0x10a0
[ 2792.682744][   T72]      ksys_write+0xf5/0x1e0
[ 2792.682744][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.682744][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.682744][   T72] 
[ 2792.685060][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2792.685060][   T72]      netdev_get_by_index+0x5e/0x80
[ 2792.685060][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2792.685060][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2792.685060][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2792.685060][   T72]      ipv6_add_addr+0x411/0x2000
[ 2792.685060][   T72]      inet6_addr_add+0x30e/0xa40
[ 2792.685060][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2792.685060][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.685060][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.685060][   T72]      netlink_unicast+0x449/0x710
[ 2792.685060][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.685060][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.685060][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.685060][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.685060][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.685060][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.685060][   T72] 
[ 2792.687653][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2792.687653][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2792.687653][   T72]      ipv6_find_idev+0x102/0x170
[ 2792.687653][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2792.687653][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.687653][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.687653][   T72]      netlink_unicast+0x449/0x710
[ 2792.687653][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.687653][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.687653][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.687653][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.687653][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.687653][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.687653][   T72] 
[ 2792.689639][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2792.689639][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2792.689639][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2792.689639][   T72]      ipv6_find_idev+0x102/0x170
[ 2792.689639][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2792.689639][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2792.689639][   T72]      netlink_rcv_skb+0x130/0x360
[ 2792.689639][   T72]      netlink_unicast+0x449/0x710
[ 2792.689639][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2792.689639][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2792.689639][   T72]      ___sys_sendmsg+0xee/0x170
[ 2792.689639][   T72]      __sys_sendmsg+0xcd/0x170
[ 2792.689639][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.689639][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.689639][   T72] 
[ 2792.691819][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2792.692104][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2792.692104][   T72]      dst_init+0x84/0x4a0
[ 2792.692104][   T72]      dst_alloc+0x97/0x150
[ 2792.692104][   T72]      ip6_dst_alloc+0x23/0x90
[ 2792.692104][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2792.692104][   T72]      ip6_pol_route+0x56f/0x840
[ 2792.692104][   T72]      fib6_rule_lookup+0x227/0x600
[ 2792.692104][   T72]      ip6_route_output_flags+0x251/0x460
[ 2792.692104][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2792.692104][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2792.692104][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2792.692104][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2792.692104][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2792.692104][   T72]      __sys_connect+0x217/0x2a0
[ 2792.692104][   T72]      __x64_sys_connect+0x72/0xb0
[ 2792.692104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2792.692104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2792.692104][   T72] 
[ 2802.932696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2802.933130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2802.933130][   T72]      netdev_get_by_index+0x5e/0x80
[ 2802.933130][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2802.933130][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2802.933130][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2802.933130][   T72]      ipv6_add_addr+0x411/0x2000
[ 2802.933130][   T72]      inet6_addr_add+0x30e/0xa40
[ 2802.933130][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2802.933130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.933130][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.933130][   T72]      netlink_unicast+0x449/0x710
[ 2802.933130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.933130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.933130][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.933130][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.933130][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.933130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.933130][   T72] 
[ 2802.935104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2802.935104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2802.935104][   T72]      ipv6_find_idev+0x102/0x170
[ 2802.935104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2802.935104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.935104][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.935104][   T72]      netlink_unicast+0x449/0x710
[ 2802.935104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.935104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.935104][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.935104][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.935104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.935104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.935104][   T72] 
[ 2802.936614][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2802.936614][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2802.936614][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2802.936614][   T72]      ipv6_find_idev+0x102/0x170
[ 2802.936614][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2802.936614][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.936614][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.936614][   T72]      netlink_unicast+0x449/0x710
[ 2802.936614][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.936614][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.936614][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.936614][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.936614][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.936614][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.936614][   T72] 
[ 2802.938290][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2802.938564][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2802.938564][   T72]      netdev_get_by_index+0x5e/0x80
[ 2802.938564][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2802.938564][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2802.938564][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2802.938564][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2802.938564][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2802.938564][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2802.938564][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2802.938564][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2802.938564][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2802.938564][   T72]      vfs_write+0x9e5/0x10a0
[ 2802.938564][   T72]      ksys_write+0xf5/0x1e0
[ 2802.938564][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.938564][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.938564][   T72] 
[ 2802.940381][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2802.940381][   T72]      netdev_get_by_index+0x5e/0x80
[ 2802.940381][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2802.940381][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2802.940381][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2802.940381][   T72]      ipv6_add_addr+0x411/0x2000
[ 2802.940381][   T72]      inet6_addr_add+0x30e/0xa40
[ 2802.940381][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2802.940381][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.940381][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.940381][   T72]      netlink_unicast+0x449/0x710
[ 2802.940381][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.940381][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.940381][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.940381][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.940381][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.940381][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.940381][   T72] 
[ 2802.942340][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2802.942340][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2802.942340][   T72]      ipv6_find_idev+0x102/0x170
[ 2802.942340][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2802.942340][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.942340][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.942340][   T72]      netlink_unicast+0x449/0x710
[ 2802.942340][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.942340][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.942340][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.942340][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.942340][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.942340][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.942340][   T72] 
[ 2802.943861][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2802.943861][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2802.943861][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2802.943861][   T72]      ipv6_find_idev+0x102/0x170
[ 2802.943861][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2802.943861][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2802.943861][   T72]      netlink_rcv_skb+0x130/0x360
[ 2802.943861][   T72]      netlink_unicast+0x449/0x710
[ 2802.943861][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2802.943861][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2802.943861][   T72]      ___sys_sendmsg+0xee/0x170
[ 2802.943861][   T72]      __sys_sendmsg+0xcd/0x170
[ 2802.943861][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.943861][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.943861][   T72] 
[ 2802.945527][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2802.945770][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2802.945770][   T72]      dst_init+0x84/0x4a0
[ 2802.945770][   T72]      dst_alloc+0x97/0x150
[ 2802.945770][   T72]      ip6_dst_alloc+0x23/0x90
[ 2802.945770][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2802.945770][   T72]      ip6_pol_route+0x56f/0x840
[ 2802.945770][   T72]      fib6_rule_lookup+0x227/0x600
[ 2802.945770][   T72]      ip6_route_output_flags+0x251/0x460
[ 2802.945770][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2802.945770][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2802.945770][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2802.945770][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2802.945770][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2802.945770][   T72]      __sys_connect+0x217/0x2a0
[ 2802.945770][   T72]      __x64_sys_connect+0x72/0xb0
[ 2802.945770][   T72]      do_syscall_64+0xc6/0x1e0
[ 2802.945770][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2802.945770][   T72] 
[ 2813.100696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2813.101124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2813.101124][   T72]      netdev_get_by_index+0x5e/0x80
[ 2813.101124][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2813.101124][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2813.101124][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2813.101124][   T72]      ipv6_add_addr+0x411/0x2000
[ 2813.101124][   T72]      inet6_addr_add+0x30e/0xa40
[ 2813.101124][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2813.101124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.101124][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.101124][   T72]      netlink_unicast+0x449/0x710
[ 2813.101124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.101124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.101124][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.101124][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.101124][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.101124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.101124][   T72] 
[ 2813.103134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2813.103134][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2813.103134][   T72]      ipv6_find_idev+0x102/0x170
[ 2813.103134][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2813.103134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.103134][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.103134][   T72]      netlink_unicast+0x449/0x710
[ 2813.103134][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.103134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.103134][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.103134][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.103134][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.103134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.103134][   T72] 
[ 2813.105140][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2813.105140][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2813.105140][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2813.105140][   T72]      ipv6_find_idev+0x102/0x170
[ 2813.105140][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2813.105140][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.105140][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.105140][   T72]      netlink_unicast+0x449/0x710
[ 2813.105140][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.105140][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.105140][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.105140][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.105140][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.105140][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.105140][   T72] 
[ 2813.107351][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2813.107703][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2813.107703][   T72]      netdev_get_by_index+0x5e/0x80
[ 2813.107703][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2813.107703][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2813.107703][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2813.107703][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2813.107703][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2813.107703][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2813.107703][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2813.107703][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2813.107703][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2813.107703][   T72]      vfs_write+0x9e5/0x10a0
[ 2813.107703][   T72]      ksys_write+0xf5/0x1e0
[ 2813.107703][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.107703][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.107703][   T72] 
[ 2813.110097][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2813.110097][   T72]      netdev_get_by_index+0x5e/0x80
[ 2813.110097][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2813.110097][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2813.110097][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2813.110097][   T72]      ipv6_add_addr+0x411/0x2000
[ 2813.110097][   T72]      inet6_addr_add+0x30e/0xa40
[ 2813.110097][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2813.110097][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.110097][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.110097][   T72]      netlink_unicast+0x449/0x710
[ 2813.110097][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.110097][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.110097][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.110097][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.110097][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.110097][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.110097][   T72] 
[ 2813.112699][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2813.112699][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2813.112699][   T72]      ipv6_find_idev+0x102/0x170
[ 2813.112699][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2813.112699][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.112699][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.112699][   T72]      netlink_unicast+0x449/0x710
[ 2813.112699][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.112699][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.112699][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.112699][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.112699][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.112699][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.112699][   T72] 
[ 2813.114693][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2813.114693][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2813.114693][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2813.114693][   T72]      ipv6_find_idev+0x102/0x170
[ 2813.114693][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2813.114693][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2813.114693][   T72]      netlink_rcv_skb+0x130/0x360
[ 2813.114693][   T72]      netlink_unicast+0x449/0x710
[ 2813.114693][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2813.114693][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2813.114693][   T72]      ___sys_sendmsg+0xee/0x170
[ 2813.114693][   T72]      __sys_sendmsg+0xcd/0x170
[ 2813.114693][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.114693][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.114693][   T72] 
[ 2813.116870][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2813.117169][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2813.117169][   T72]      dst_init+0x84/0x4a0
[ 2813.117169][   T72]      dst_alloc+0x97/0x150
[ 2813.117169][   T72]      ip6_dst_alloc+0x23/0x90
[ 2813.117169][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2813.117169][   T72]      ip6_pol_route+0x56f/0x840
[ 2813.117169][   T72]      fib6_rule_lookup+0x227/0x600
[ 2813.117169][   T72]      ip6_route_output_flags+0x251/0x460
[ 2813.117169][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2813.117169][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2813.117169][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2813.117169][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2813.117169][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2813.117169][   T72]      __sys_connect+0x217/0x2a0
[ 2813.117169][   T72]      __x64_sys_connect+0x72/0xb0
[ 2813.117169][   T72]      do_syscall_64+0xc6/0x1e0
[ 2813.117169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2813.117169][   T72] 
[ 2823.356706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2823.357153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2823.357153][   T72]      netdev_get_by_index+0x5e/0x80
[ 2823.357153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2823.357153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2823.357153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2823.357153][   T72]      ipv6_add_addr+0x411/0x2000
[ 2823.357153][   T72]      inet6_addr_add+0x30e/0xa40
[ 2823.357153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2823.357153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.357153][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.357153][   T72]      netlink_unicast+0x449/0x710
[ 2823.357153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.357153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.357153][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.357153][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.357153][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.357153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.357153][   T72] 
[ 2823.359155][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2823.359155][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2823.359155][   T72]      ipv6_find_idev+0x102/0x170
[ 2823.359155][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2823.359155][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.359155][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.359155][   T72]      netlink_unicast+0x449/0x710
[ 2823.359155][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.359155][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.359155][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.359155][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.359155][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.359155][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.359155][   T72] 
[ 2823.360659][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2823.360659][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2823.360659][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2823.360659][   T72]      ipv6_find_idev+0x102/0x170
[ 2823.360659][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2823.360659][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.360659][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.360659][   T72]      netlink_unicast+0x449/0x710
[ 2823.360659][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.360659][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.360659][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.360659][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.360659][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.360659][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.360659][   T72] 
[ 2823.362308][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2823.362575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2823.362575][   T72]      netdev_get_by_index+0x5e/0x80
[ 2823.362575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2823.362575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2823.362575][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2823.362575][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2823.362575][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2823.362575][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2823.362575][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2823.362575][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2823.362575][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2823.362575][   T72]      vfs_write+0x9e5/0x10a0
[ 2823.362575][   T72]      ksys_write+0xf5/0x1e0
[ 2823.362575][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.362575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.362575][   T72] 
[ 2823.364383][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2823.364383][   T72]      netdev_get_by_index+0x5e/0x80
[ 2823.364383][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2823.364383][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2823.364383][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2823.364383][   T72]      ipv6_add_addr+0x411/0x2000
[ 2823.364383][   T72]      inet6_addr_add+0x30e/0xa40
[ 2823.364383][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2823.364383][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.364383][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.364383][   T72]      netlink_unicast+0x449/0x710
[ 2823.364383][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.364383][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.364383][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.364383][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.364383][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.364383][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.364383][   T72] 
[ 2823.366712][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2823.366712][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2823.366712][   T72]      ipv6_find_idev+0x102/0x170
[ 2823.366712][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2823.366712][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.366712][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.366712][   T72]      netlink_unicast+0x449/0x710
[ 2823.366712][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.366712][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.366712][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.366712][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.366712][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.366712][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.366712][   T72] 
[ 2823.368656][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2823.368656][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2823.368656][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2823.368656][   T72]      ipv6_find_idev+0x102/0x170
[ 2823.368656][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2823.368656][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2823.368656][   T72]      netlink_rcv_skb+0x130/0x360
[ 2823.368656][   T72]      netlink_unicast+0x449/0x710
[ 2823.368656][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2823.368656][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2823.368656][   T72]      ___sys_sendmsg+0xee/0x170
[ 2823.368656][   T72]      __sys_sendmsg+0xcd/0x170
[ 2823.368656][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.368656][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.368656][   T72] 
[ 2823.370772][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2823.371083][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2823.371083][   T72]      dst_init+0x84/0x4a0
[ 2823.371083][   T72]      dst_alloc+0x97/0x150
[ 2823.371083][   T72]      ip6_dst_alloc+0x23/0x90
[ 2823.371083][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2823.371083][   T72]      ip6_pol_route+0x56f/0x840
[ 2823.371083][   T72]      fib6_rule_lookup+0x227/0x600
[ 2823.371083][   T72]      ip6_route_output_flags+0x251/0x460
[ 2823.371083][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2823.371083][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2823.371083][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2823.371083][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2823.371083][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2823.371083][   T72]      __sys_connect+0x217/0x2a0
[ 2823.371083][   T72]      __x64_sys_connect+0x72/0xb0
[ 2823.371083][   T72]      do_syscall_64+0xc6/0x1e0
[ 2823.371083][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2823.371083][   T72] 
[ 2833.492727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2833.493160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2833.493160][   T72]      netdev_get_by_index+0x5e/0x80
[ 2833.493160][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2833.493160][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2833.493160][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2833.493160][   T72]      ipv6_add_addr+0x411/0x2000
[ 2833.493160][   T72]      inet6_addr_add+0x30e/0xa40
[ 2833.493160][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2833.493160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.493160][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.493160][   T72]      netlink_unicast+0x449/0x710
[ 2833.493160][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.493160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.493160][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.493160][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.493160][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.493160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.493160][   T72] 
[ 2833.495124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2833.495124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2833.495124][   T72]      ipv6_find_idev+0x102/0x170
[ 2833.495124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2833.495124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.495124][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.495124][   T72]      netlink_unicast+0x449/0x710
[ 2833.495124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.495124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.495124][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.495124][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.495124][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.495124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.495124][   T72] 
[ 2833.496635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2833.496635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2833.496635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2833.496635][   T72]      ipv6_find_idev+0x102/0x170
[ 2833.496635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2833.496635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.496635][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.496635][   T72]      netlink_unicast+0x449/0x710
[ 2833.496635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.496635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.496635][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.496635][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.496635][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.496635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.496635][   T72] 
[ 2833.498298][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2833.498564][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2833.498564][   T72]      netdev_get_by_index+0x5e/0x80
[ 2833.498564][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2833.498564][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2833.498564][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2833.498564][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2833.498564][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2833.498564][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2833.498564][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2833.498564][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2833.498564][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2833.498564][   T72]      vfs_write+0x9e5/0x10a0
[ 2833.498564][   T72]      ksys_write+0xf5/0x1e0
[ 2833.498564][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.498564][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.498564][   T72] 
[ 2833.500634][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2833.500634][   T72]      netdev_get_by_index+0x5e/0x80
[ 2833.500634][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2833.500634][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2833.500634][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2833.500634][   T72]      ipv6_add_addr+0x411/0x2000
[ 2833.500634][   T72]      inet6_addr_add+0x30e/0xa40
[ 2833.500634][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2833.500634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.500634][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.500634][   T72]      netlink_unicast+0x449/0x710
[ 2833.500634][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.500634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.500634][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.500634][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.500634][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.500634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.500634][   T72] 
[ 2833.503168][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2833.503168][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2833.503168][   T72]      ipv6_find_idev+0x102/0x170
[ 2833.503168][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2833.503168][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.503168][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.503168][   T72]      netlink_unicast+0x449/0x710
[ 2833.503168][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.503168][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.503168][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.503168][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.503168][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.503168][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.503168][   T72] 
[ 2833.505145][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2833.505145][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2833.505145][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2833.505145][   T72]      ipv6_find_idev+0x102/0x170
[ 2833.505145][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2833.505145][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2833.505145][   T72]      netlink_rcv_skb+0x130/0x360
[ 2833.505145][   T72]      netlink_unicast+0x449/0x710
[ 2833.505145][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2833.505145][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2833.505145][   T72]      ___sys_sendmsg+0xee/0x170
[ 2833.505145][   T72]      __sys_sendmsg+0xcd/0x170
[ 2833.505145][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.505145][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.505145][   T72] 
[ 2833.507336][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2833.507656][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2833.507656][   T72]      dst_init+0x84/0x4a0
[ 2833.507656][   T72]      dst_alloc+0x97/0x150
[ 2833.507656][   T72]      ip6_dst_alloc+0x23/0x90
[ 2833.507656][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2833.507656][   T72]      ip6_pol_route+0x56f/0x840
[ 2833.507656][   T72]      fib6_rule_lookup+0x227/0x600
[ 2833.507656][   T72]      ip6_route_output_flags+0x251/0x460
[ 2833.507656][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2833.507656][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2833.507656][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2833.507656][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2833.507656][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2833.507656][   T72]      __sys_connect+0x217/0x2a0
[ 2833.507656][   T72]      __x64_sys_connect+0x72/0xb0
[ 2833.507656][   T72]      do_syscall_64+0xc6/0x1e0
[ 2833.507656][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2833.507656][   T72] 
[ 2843.748704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2843.749132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2843.749132][   T72]      netdev_get_by_index+0x5e/0x80
[ 2843.749132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2843.749132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2843.749132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2843.749132][   T72]      ipv6_add_addr+0x411/0x2000
[ 2843.749132][   T72]      inet6_addr_add+0x30e/0xa40
[ 2843.749132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2843.749132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.749132][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.749132][   T72]      netlink_unicast+0x449/0x710
[ 2843.749132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.749132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.749132][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.749132][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.749132][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.749132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.749132][   T72] 
[ 2843.751106][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2843.751106][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2843.751106][   T72]      ipv6_find_idev+0x102/0x170
[ 2843.751106][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2843.751106][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.751106][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.751106][   T72]      netlink_unicast+0x449/0x710
[ 2843.751106][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.751106][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.751106][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.751106][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.751106][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.751106][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.751106][   T72] 
[ 2843.752622][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2843.752622][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2843.752622][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2843.752622][   T72]      ipv6_find_idev+0x102/0x170
[ 2843.752622][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2843.752622][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.752622][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.752622][   T72]      netlink_unicast+0x449/0x710
[ 2843.752622][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.752622][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.752622][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.752622][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.752622][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.752622][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.752622][   T72] 
[ 2843.754311][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2843.754574][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2843.754574][   T72]      netdev_get_by_index+0x5e/0x80
[ 2843.754574][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2843.754574][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2843.754574][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2843.754574][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2843.754574][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2843.754574][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2843.754574][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2843.754574][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2843.754574][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2843.754574][   T72]      vfs_write+0x9e5/0x10a0
[ 2843.754574][   T72]      ksys_write+0xf5/0x1e0
[ 2843.754574][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.754574][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.754574][   T72] 
[ 2843.756406][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2843.756406][   T72]      netdev_get_by_index+0x5e/0x80
[ 2843.756406][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2843.756406][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2843.756406][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2843.756406][   T72]      ipv6_add_addr+0x411/0x2000
[ 2843.756406][   T72]      inet6_addr_add+0x30e/0xa40
[ 2843.756406][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2843.756406][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.756406][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.756406][   T72]      netlink_unicast+0x449/0x710
[ 2843.756406][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.756406][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.756406][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.756406][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.756406][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.756406][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.756406][   T72] 
[ 2843.758829][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2843.758829][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2843.758829][   T72]      ipv6_find_idev+0x102/0x170
[ 2843.758829][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2843.758829][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.758829][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.758829][   T72]      netlink_unicast+0x449/0x710
[ 2843.758829][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.758829][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.758829][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.758829][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.758829][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.758829][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.758829][   T72] 
[ 2843.760813][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2843.760813][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2843.760813][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2843.760813][   T72]      ipv6_find_idev+0x102/0x170
[ 2843.760813][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2843.760813][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2843.760813][   T72]      netlink_rcv_skb+0x130/0x360
[ 2843.760813][   T72]      netlink_unicast+0x449/0x710
[ 2843.760813][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2843.760813][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2843.760813][   T72]      ___sys_sendmsg+0xee/0x170
[ 2843.760813][   T72]      __sys_sendmsg+0xcd/0x170
[ 2843.760813][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.760813][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.760813][   T72] 
[ 2843.762997][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2843.763283][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2843.763283][   T72]      dst_init+0x84/0x4a0
[ 2843.763283][   T72]      dst_alloc+0x97/0x150
[ 2843.763283][   T72]      ip6_dst_alloc+0x23/0x90
[ 2843.763283][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2843.763283][   T72]      ip6_pol_route+0x56f/0x840
[ 2843.763283][   T72]      fib6_rule_lookup+0x227/0x600
[ 2843.763283][   T72]      ip6_route_output_flags+0x251/0x460
[ 2843.763283][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2843.763283][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2843.763283][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2843.763283][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2843.763283][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2843.763283][   T72]      __sys_connect+0x217/0x2a0
[ 2843.763283][   T72]      __x64_sys_connect+0x72/0xb0
[ 2843.763283][   T72]      do_syscall_64+0xc6/0x1e0
[ 2843.763283][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2843.763283][   T72] 
[ 2854.004643][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2854.005094][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2854.005094][   T72]      netdev_get_by_index+0x5e/0x80
[ 2854.005094][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2854.005094][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2854.005094][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2854.005094][   T72]      ipv6_add_addr+0x411/0x2000
[ 2854.005094][   T72]      inet6_addr_add+0x30e/0xa40
[ 2854.005094][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2854.005094][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.005094][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.005094][   T72]      netlink_unicast+0x449/0x710
[ 2854.005094][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.005094][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.005094][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.005094][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.005094][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.005094][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.005094][   T72] 
[ 2854.007074][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2854.007074][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2854.007074][   T72]      ipv6_find_idev+0x102/0x170
[ 2854.007074][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2854.007074][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.007074][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.007074][   T72]      netlink_unicast+0x449/0x710
[ 2854.007074][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.007074][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.007074][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.007074][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.007074][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.007074][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.007074][   T72] 
[ 2854.008585][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2854.008585][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2854.008585][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2854.008585][   T72]      ipv6_find_idev+0x102/0x170
[ 2854.008585][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2854.008585][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.008585][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.008585][   T72]      netlink_unicast+0x449/0x710
[ 2854.008585][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.008585][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.008585][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.008585][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.008585][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.008585][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.008585][   T72] 
[ 2854.010237][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2854.010499][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2854.010499][   T72]      netdev_get_by_index+0x5e/0x80
[ 2854.010499][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2854.010499][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2854.010499][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2854.010499][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2854.010499][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2854.010499][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2854.010499][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2854.010499][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2854.010499][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2854.010499][   T72]      vfs_write+0x9e5/0x10a0
[ 2854.010499][   T72]      ksys_write+0xf5/0x1e0
[ 2854.010499][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.010499][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.010499][   T72] 
[ 2854.012820][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2854.012820][   T72]      netdev_get_by_index+0x5e/0x80
[ 2854.012820][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2854.012820][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2854.012820][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2854.012820][   T72]      ipv6_add_addr+0x411/0x2000
[ 2854.012820][   T72]      inet6_addr_add+0x30e/0xa40
[ 2854.012820][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2854.012820][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.012820][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.012820][   T72]      netlink_unicast+0x449/0x710
[ 2854.012820][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.012820][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.012820][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.012820][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.012820][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.012820][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.012820][   T72] 
[ 2854.015371][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2854.015371][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2854.015371][   T72]      ipv6_find_idev+0x102/0x170
[ 2854.015371][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2854.015371][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.015371][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.015371][   T72]      netlink_unicast+0x449/0x710
[ 2854.015371][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.015371][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.015371][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.015371][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.015371][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.015371][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.015371][   T72] 
[ 2854.017368][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2854.017368][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2854.017368][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2854.017368][   T72]      ipv6_find_idev+0x102/0x170
[ 2854.017368][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2854.017368][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2854.017368][   T72]      netlink_rcv_skb+0x130/0x360
[ 2854.017368][   T72]      netlink_unicast+0x449/0x710
[ 2854.017368][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2854.017368][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2854.017368][   T72]      ___sys_sendmsg+0xee/0x170
[ 2854.017368][   T72]      __sys_sendmsg+0xcd/0x170
[ 2854.017368][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.017368][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.017368][   T72] 
[ 2854.019543][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2854.019840][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2854.019840][   T72]      dst_init+0x84/0x4a0
[ 2854.019840][   T72]      dst_alloc+0x97/0x150
[ 2854.019840][   T72]      ip6_dst_alloc+0x23/0x90
[ 2854.019840][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2854.019840][   T72]      ip6_pol_route+0x56f/0x840
[ 2854.019840][   T72]      fib6_rule_lookup+0x227/0x600
[ 2854.019840][   T72]      ip6_route_output_flags+0x251/0x460
[ 2854.019840][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2854.019840][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2854.019840][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2854.019840][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2854.019840][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2854.019840][   T72]      __sys_connect+0x217/0x2a0
[ 2854.019840][   T72]      __x64_sys_connect+0x72/0xb0
[ 2854.019840][   T72]      do_syscall_64+0xc6/0x1e0
[ 2854.019840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2854.019840][   T72] 
[ 2864.236708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2864.237151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2864.237151][   T72]      netdev_get_by_index+0x5e/0x80
[ 2864.237151][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2864.237151][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2864.237151][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2864.237151][   T72]      ipv6_add_addr+0x411/0x2000
[ 2864.237151][   T72]      inet6_addr_add+0x30e/0xa40
[ 2864.237151][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2864.237151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.237151][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.237151][   T72]      netlink_unicast+0x449/0x710
[ 2864.237151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.237151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.237151][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.237151][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.237151][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.237151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.237151][   T72] 
[ 2864.239663][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2864.239663][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2864.239663][   T72]      ipv6_find_idev+0x102/0x170
[ 2864.239663][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2864.239663][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.239663][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.239663][   T72]      netlink_unicast+0x449/0x710
[ 2864.239663][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.239663][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.239663][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.239663][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.239663][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.239663][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.239663][   T72] 
[ 2864.241691][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2864.241691][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2864.241691][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2864.241691][   T72]      ipv6_find_idev+0x102/0x170
[ 2864.241691][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2864.241691][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.241691][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.241691][   T72]      netlink_unicast+0x449/0x710
[ 2864.241691][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.241691][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.241691][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.241691][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.241691][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.241691][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.241691][   T72] 
[ 2864.243909][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2864.244251][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2864.244251][   T72]      netdev_get_by_index+0x5e/0x80
[ 2864.244251][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2864.244251][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2864.244251][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2864.244251][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2864.244251][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2864.244251][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2864.244251][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2864.244251][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2864.244251][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2864.244251][   T72]      vfs_write+0x9e5/0x10a0
[ 2864.244251][   T72]      ksys_write+0xf5/0x1e0
[ 2864.244251][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.244251][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.244251][   T72] 
[ 2864.246698][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2864.246698][   T72]      netdev_get_by_index+0x5e/0x80
[ 2864.246698][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2864.246698][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2864.246698][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2864.246698][   T72]      ipv6_add_addr+0x411/0x2000
[ 2864.246698][   T72]      inet6_addr_add+0x30e/0xa40
[ 2864.246698][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2864.246698][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.246698][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.246698][   T72]      netlink_unicast+0x449/0x710
[ 2864.246698][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.246698][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.246698][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.246698][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.246698][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.246698][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.246698][   T72] 
[ 2864.249294][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2864.249294][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2864.249294][   T72]      ipv6_find_idev+0x102/0x170
[ 2864.249294][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2864.249294][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.249294][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.249294][   T72]      netlink_unicast+0x449/0x710
[ 2864.249294][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.249294][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.249294][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.249294][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.249294][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.249294][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.249294][   T72] 
[ 2864.251323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2864.251323][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2864.251323][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2864.251323][   T72]      ipv6_find_idev+0x102/0x170
[ 2864.251323][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2864.251323][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2864.251323][   T72]      netlink_rcv_skb+0x130/0x360
[ 2864.251323][   T72]      netlink_unicast+0x449/0x710
[ 2864.251323][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2864.251323][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2864.251323][   T72]      ___sys_sendmsg+0xee/0x170
[ 2864.251323][   T72]      __sys_sendmsg+0xcd/0x170
[ 2864.251323][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.251323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.251323][   T72] 
[ 2864.253512][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2864.253820][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2864.253820][   T72]      dst_init+0x84/0x4a0
[ 2864.253820][   T72]      dst_alloc+0x97/0x150
[ 2864.253820][   T72]      ip6_dst_alloc+0x23/0x90
[ 2864.253820][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2864.253820][   T72]      ip6_pol_route+0x56f/0x840
[ 2864.253820][   T72]      fib6_rule_lookup+0x227/0x600
[ 2864.253820][   T72]      ip6_route_output_flags+0x251/0x460
[ 2864.253820][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2864.253820][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2864.253820][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2864.253820][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2864.253820][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2864.253820][   T72]      __sys_connect+0x217/0x2a0
[ 2864.253820][   T72]      __x64_sys_connect+0x72/0xb0
[ 2864.253820][   T72]      do_syscall_64+0xc6/0x1e0
[ 2864.253820][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2864.253820][   T72] 
[ 2874.348698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2874.349104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2874.349104][   T72]      netdev_get_by_index+0x5e/0x80
[ 2874.349104][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2874.349104][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2874.349104][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2874.349104][   T72]      ipv6_add_addr+0x411/0x2000
[ 2874.349104][   T72]      inet6_addr_add+0x30e/0xa40
[ 2874.349104][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2874.349104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.349104][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.349104][   T72]      netlink_unicast+0x449/0x710
[ 2874.349104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.349104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.349104][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.349104][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.349104][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.349104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.349104][   T72] 
[ 2874.354927][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2874.354927][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2874.354927][   T72]      ipv6_find_idev+0x102/0x170
[ 2874.354927][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2874.354927][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.354927][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.354927][   T72]      netlink_unicast+0x449/0x710
[ 2874.354927][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.354927][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.354927][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.354927][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.354927][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.354927][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.354927][   T72] 
[ 2874.356444][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2874.356444][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2874.356444][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2874.356444][   T72]      ipv6_find_idev+0x102/0x170
[ 2874.356444][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2874.356444][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.356444][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.356444][   T72]      netlink_unicast+0x449/0x710
[ 2874.356444][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.356444][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.356444][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.356444][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.356444][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.356444][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.356444][   T72] 
[ 2874.358111][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2874.358384][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2874.358384][   T72]      netdev_get_by_index+0x5e/0x80
[ 2874.358384][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2874.358384][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2874.358384][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2874.358384][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2874.358384][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2874.358384][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2874.358384][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2874.358384][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2874.358384][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2874.358384][   T72]      vfs_write+0x9e5/0x10a0
[ 2874.358384][   T72]      ksys_write+0xf5/0x1e0
[ 2874.358384][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.358384][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.358384][   T72] 
[ 2874.360193][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2874.360193][   T72]      netdev_get_by_index+0x5e/0x80
[ 2874.360193][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2874.360193][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2874.360193][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2874.360193][   T72]      ipv6_add_addr+0x411/0x2000
[ 2874.360193][   T72]      inet6_addr_add+0x30e/0xa40
[ 2874.360193][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2874.360193][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.360193][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.360193][   T72]      netlink_unicast+0x449/0x710
[ 2874.360193][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.360193][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.360193][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.360193][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.360193][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.360193][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.360193][   T72] 
[ 2874.362139][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2874.362139][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2874.362139][   T72]      ipv6_find_idev+0x102/0x170
[ 2874.362139][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2874.362139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.362139][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.362139][   T72]      netlink_unicast+0x449/0x710
[ 2874.362139][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.362139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.362139][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.362139][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.362139][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.362139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.362139][   T72] 
[ 2874.363640][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2874.363640][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2874.363640][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2874.363640][   T72]      ipv6_find_idev+0x102/0x170
[ 2874.363640][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2874.363640][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2874.363640][   T72]      netlink_rcv_skb+0x130/0x360
[ 2874.363640][   T72]      netlink_unicast+0x449/0x710
[ 2874.363640][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2874.363640][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2874.363640][   T72]      ___sys_sendmsg+0xee/0x170
[ 2874.363640][   T72]      __sys_sendmsg+0xcd/0x170
[ 2874.363640][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.363640][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.363640][   T72] 
[ 2874.365278][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2874.365520][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2874.365520][   T72]      dst_init+0x84/0x4a0
[ 2874.365520][   T72]      dst_alloc+0x97/0x150
[ 2874.365520][   T72]      ip6_dst_alloc+0x23/0x90
[ 2874.365520][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2874.365520][   T72]      ip6_pol_route+0x56f/0x840
[ 2874.365520][   T72]      fib6_rule_lookup+0x227/0x600
[ 2874.365520][   T72]      ip6_route_output_flags+0x251/0x460
[ 2874.365520][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2874.365520][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2874.365520][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2874.365520][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2874.365520][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2874.365520][   T72]      __sys_connect+0x217/0x2a0
[ 2874.365520][   T72]      __x64_sys_connect+0x72/0xb0
[ 2874.365520][   T72]      do_syscall_64+0xc6/0x1e0
[ 2874.365520][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2874.365520][   T72] 
[ 2884.420617][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2884.421050][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2884.421050][   T72]      netdev_get_by_index+0x5e/0x80
[ 2884.421050][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2884.421050][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2884.421050][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2884.421050][   T72]      ipv6_add_addr+0x411/0x2000
[ 2884.421050][   T72]      inet6_addr_add+0x30e/0xa40
[ 2884.421050][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2884.421050][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.421050][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.421050][   T72]      netlink_unicast+0x449/0x710
[ 2884.421050][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.421050][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.421050][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.421050][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.421050][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.421050][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.421050][   T72] 
[ 2884.423024][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2884.423024][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2884.423024][   T72]      ipv6_find_idev+0x102/0x170
[ 2884.423024][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2884.423024][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.423024][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.423024][   T72]      netlink_unicast+0x449/0x710
[ 2884.423024][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.423024][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.423024][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.423024][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.423024][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.423024][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.423024][   T72] 
[ 2884.424537][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2884.424537][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2884.424537][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2884.424537][   T72]      ipv6_find_idev+0x102/0x170
[ 2884.424537][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2884.424537][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.424537][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.424537][   T72]      netlink_unicast+0x449/0x710
[ 2884.424537][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.424537][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.424537][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.424537][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.424537][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.424537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.424537][   T72] 
[ 2884.426189][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2884.426457][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2884.426457][   T72]      netdev_get_by_index+0x5e/0x80
[ 2884.426457][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2884.426457][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2884.426457][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2884.426457][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2884.426457][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2884.426457][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2884.426457][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2884.426457][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2884.426457][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2884.426457][   T72]      vfs_write+0x9e5/0x10a0
[ 2884.426457][   T72]      ksys_write+0xf5/0x1e0
[ 2884.426457][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.426457][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.426457][   T72] 
[ 2884.428276][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2884.428276][   T72]      netdev_get_by_index+0x5e/0x80
[ 2884.428276][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2884.428276][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2884.428276][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2884.428276][   T72]      ipv6_add_addr+0x411/0x2000
[ 2884.428276][   T72]      inet6_addr_add+0x30e/0xa40
[ 2884.428276][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2884.428276][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.428276][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.428276][   T72]      netlink_unicast+0x449/0x710
[ 2884.428276][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.428276][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.428276][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.428276][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.428276][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.428276][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.428276][   T72] 
[ 2884.430239][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2884.430239][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2884.430239][   T72]      ipv6_find_idev+0x102/0x170
[ 2884.430239][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2884.430239][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.430239][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.430239][   T72]      netlink_unicast+0x449/0x710
[ 2884.430239][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.430239][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.430239][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.430239][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.430239][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.430239][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.430239][   T72] 
[ 2884.431746][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2884.431746][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2884.431746][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2884.431746][   T72]      ipv6_find_idev+0x102/0x170
[ 2884.431746][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2884.431746][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2884.431746][   T72]      netlink_rcv_skb+0x130/0x360
[ 2884.431746][   T72]      netlink_unicast+0x449/0x710
[ 2884.431746][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2884.431746][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2884.431746][   T72]      ___sys_sendmsg+0xee/0x170
[ 2884.431746][   T72]      __sys_sendmsg+0xcd/0x170
[ 2884.431746][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.431746][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.431746][   T72] 
[ 2884.433400][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2884.433637][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2884.433637][   T72]      dst_init+0x84/0x4a0
[ 2884.433637][   T72]      dst_alloc+0x97/0x150
[ 2884.433637][   T72]      ip6_dst_alloc+0x23/0x90
[ 2884.433637][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2884.433637][   T72]      ip6_pol_route+0x56f/0x840
[ 2884.433637][   T72]      fib6_rule_lookup+0x227/0x600
[ 2884.433637][   T72]      ip6_route_output_flags+0x251/0x460
[ 2884.433637][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2884.433637][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2884.433637][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2884.433637][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2884.433637][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2884.433637][   T72]      __sys_connect+0x217/0x2a0
[ 2884.433637][   T72]      __x64_sys_connect+0x72/0xb0
[ 2884.433637][   T72]      do_syscall_64+0xc6/0x1e0
[ 2884.433637][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2884.433637][   T72] 
[ 2894.628705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2894.629142][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2894.629142][   T72]      netdev_get_by_index+0x5e/0x80
[ 2894.629142][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2894.629142][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2894.629142][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2894.629142][   T72]      ipv6_add_addr+0x411/0x2000
[ 2894.629142][   T72]      inet6_addr_add+0x30e/0xa40
[ 2894.629142][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2894.629142][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.629142][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.629142][   T72]      netlink_unicast+0x449/0x710
[ 2894.629142][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.629142][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.629142][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.629142][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.629142][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.629142][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.629142][   T72] 
[ 2894.631119][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2894.631119][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2894.631119][   T72]      ipv6_find_idev+0x102/0x170
[ 2894.631119][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2894.631119][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.631119][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.631119][   T72]      netlink_unicast+0x449/0x710
[ 2894.631119][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.631119][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.631119][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.631119][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.631119][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.631119][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.631119][   T72] 
[ 2894.632644][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2894.632644][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2894.632644][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2894.632644][   T72]      ipv6_find_idev+0x102/0x170
[ 2894.632644][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2894.632644][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.632644][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.632644][   T72]      netlink_unicast+0x449/0x710
[ 2894.632644][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.632644][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.632644][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.632644][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.632644][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.632644][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.632644][   T72] 
[ 2894.634300][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2894.634573][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2894.634573][   T72]      netdev_get_by_index+0x5e/0x80
[ 2894.634573][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2894.634573][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2894.634573][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2894.634573][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2894.634573][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2894.634573][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2894.634573][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2894.634573][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2894.634573][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2894.634573][   T72]      vfs_write+0x9e5/0x10a0
[ 2894.634573][   T72]      ksys_write+0xf5/0x1e0
[ 2894.634573][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.634573][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.634573][   T72] 
[ 2894.636395][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2894.636395][   T72]      netdev_get_by_index+0x5e/0x80
[ 2894.636395][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2894.636395][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2894.636395][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2894.636395][   T72]      ipv6_add_addr+0x411/0x2000
[ 2894.636395][   T72]      inet6_addr_add+0x30e/0xa40
[ 2894.636395][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2894.636395][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.636395][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.636395][   T72]      netlink_unicast+0x449/0x710
[ 2894.636395][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.636395][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.636395][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.636395][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.636395][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.636395][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.636395][   T72] 
[ 2894.638356][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2894.638356][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2894.638356][   T72]      ipv6_find_idev+0x102/0x170
[ 2894.638356][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2894.638356][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.638356][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.638356][   T72]      netlink_unicast+0x449/0x710
[ 2894.638356][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.638356][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.638356][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.638356][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.638356][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.638356][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.638356][   T72] 
[ 2894.639861][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2894.639861][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2894.639861][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2894.639861][   T72]      ipv6_find_idev+0x102/0x170
[ 2894.639861][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2894.639861][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2894.639861][   T72]      netlink_rcv_skb+0x130/0x360
[ 2894.639861][   T72]      netlink_unicast+0x449/0x710
[ 2894.639861][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2894.639861][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2894.639861][   T72]      ___sys_sendmsg+0xee/0x170
[ 2894.639861][   T72]      __sys_sendmsg+0xcd/0x170
[ 2894.639861][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.639861][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.639861][   T72] 
[ 2894.641508][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2894.641755][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2894.641755][   T72]      dst_init+0x84/0x4a0
[ 2894.641755][   T72]      dst_alloc+0x97/0x150
[ 2894.641755][   T72]      ip6_dst_alloc+0x23/0x90
[ 2894.641755][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2894.641755][   T72]      ip6_pol_route+0x56f/0x840
[ 2894.641755][   T72]      fib6_rule_lookup+0x227/0x600
[ 2894.641755][   T72]      ip6_route_output_flags+0x251/0x460
[ 2894.641755][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2894.641755][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2894.641755][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2894.641755][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2894.641755][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2894.641755][   T72]      __sys_connect+0x217/0x2a0
[ 2894.641755][   T72]      __x64_sys_connect+0x72/0xb0
[ 2894.641755][   T72]      do_syscall_64+0xc6/0x1e0
[ 2894.641755][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2894.641755][   T72] 
[ 2904.836818][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2904.837205][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2904.837205][   T72]      netdev_get_by_index+0x5e/0x80
[ 2904.837205][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2904.837205][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2904.837205][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2904.837205][   T72]      ipv6_add_addr+0x411/0x2000
[ 2904.837205][   T72]      inet6_addr_add+0x30e/0xa40
[ 2904.837205][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2904.837205][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.837205][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.837205][   T72]      netlink_unicast+0x449/0x710
[ 2904.837205][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.837205][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.837205][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.837205][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.837205][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.837205][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.837205][   T72] 
[ 2904.839182][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2904.839182][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2904.839182][   T72]      ipv6_find_idev+0x102/0x170
[ 2904.839182][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2904.839182][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.839182][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.839182][   T72]      netlink_unicast+0x449/0x710
[ 2904.839182][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.839182][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.839182][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.839182][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.839182][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.839182][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.839182][   T72] 
[ 2904.840707][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2904.840707][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2904.840707][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2904.840707][   T72]      ipv6_find_idev+0x102/0x170
[ 2904.840707][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2904.840707][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.840707][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.840707][   T72]      netlink_unicast+0x449/0x710
[ 2904.840707][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.840707][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.840707][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.840707][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.840707][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.840707][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.840707][   T72] 
[ 2904.842889][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2904.843238][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2904.843238][   T72]      netdev_get_by_index+0x5e/0x80
[ 2904.843238][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2904.843238][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2904.843238][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2904.843238][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2904.843238][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2904.843238][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2904.843238][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2904.843238][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2904.843238][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2904.843238][   T72]      vfs_write+0x9e5/0x10a0
[ 2904.843238][   T72]      ksys_write+0xf5/0x1e0
[ 2904.843238][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.843238][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.843238][   T72] 
[ 2904.845601][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2904.845601][   T72]      netdev_get_by_index+0x5e/0x80
[ 2904.845601][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2904.845601][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2904.845601][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2904.845601][   T72]      ipv6_add_addr+0x411/0x2000
[ 2904.845601][   T72]      inet6_addr_add+0x30e/0xa40
[ 2904.845601][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2904.845601][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.845601][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.845601][   T72]      netlink_unicast+0x449/0x710
[ 2904.845601][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.845601][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.845601][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.845601][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.845601][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.845601][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.845601][   T72] 
[ 2904.848183][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2904.848183][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2904.848183][   T72]      ipv6_find_idev+0x102/0x170
[ 2904.848183][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2904.848183][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.848183][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.848183][   T72]      netlink_unicast+0x449/0x710
[ 2904.848183][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.848183][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.848183][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.848183][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.848183][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.848183][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.848183][   T72] 
[ 2904.850181][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2904.850181][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2904.850181][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2904.850181][   T72]      ipv6_find_idev+0x102/0x170
[ 2904.850181][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2904.850181][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2904.850181][   T72]      netlink_rcv_skb+0x130/0x360
[ 2904.850181][   T72]      netlink_unicast+0x449/0x710
[ 2904.850181][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2904.850181][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2904.850181][   T72]      ___sys_sendmsg+0xee/0x170
[ 2904.850181][   T72]      __sys_sendmsg+0xcd/0x170
[ 2904.850181][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.850181][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.850181][   T72] 
[ 2904.852360][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2904.852664][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2904.852664][   T72]      dst_init+0x84/0x4a0
[ 2904.852664][   T72]      dst_alloc+0x97/0x150
[ 2904.852664][   T72]      ip6_dst_alloc+0x23/0x90
[ 2904.852664][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2904.852664][   T72]      ip6_pol_route+0x56f/0x840
[ 2904.852664][   T72]      fib6_rule_lookup+0x227/0x600
[ 2904.852664][   T72]      ip6_route_output_flags+0x251/0x460
[ 2904.852664][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2904.852664][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2904.852664][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2904.852664][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2904.852664][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2904.852664][   T72]      __sys_connect+0x217/0x2a0
[ 2904.852664][   T72]      __x64_sys_connect+0x72/0xb0
[ 2904.852664][   T72]      do_syscall_64+0xc6/0x1e0
[ 2904.852664][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2904.852664][   T72] 
[ 2915.108710][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2915.109141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2915.109141][   T72]      netdev_get_by_index+0x5e/0x80
[ 2915.109141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2915.109141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2915.109141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2915.109141][   T72]      ipv6_add_addr+0x411/0x2000
[ 2915.109141][   T72]      inet6_addr_add+0x30e/0xa40
[ 2915.109141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2915.109141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.109141][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.109141][   T72]      netlink_unicast+0x449/0x710
[ 2915.109141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.109141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.109141][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.109141][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.109141][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.109141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.109141][   T72] 
[ 2915.111124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2915.111124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2915.111124][   T72]      ipv6_find_idev+0x102/0x170
[ 2915.111124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2915.111124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.111124][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.111124][   T72]      netlink_unicast+0x449/0x710
[ 2915.111124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.111124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.111124][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.111124][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.111124][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.111124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.111124][   T72] 
[ 2915.112647][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2915.112647][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2915.112647][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2915.112647][   T72]      ipv6_find_idev+0x102/0x170
[ 2915.112647][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2915.112647][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.112647][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.112647][   T72]      netlink_unicast+0x449/0x710
[ 2915.112647][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.112647][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.112647][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.112647][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.112647][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.112647][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.112647][   T72] 
[ 2915.114299][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2915.114567][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2915.114567][   T72]      netdev_get_by_index+0x5e/0x80
[ 2915.114567][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2915.114567][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2915.114567][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2915.114567][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2915.114567][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2915.114567][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2915.114567][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2915.114567][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2915.114567][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2915.114567][   T72]      vfs_write+0x9e5/0x10a0
[ 2915.114567][   T72]      ksys_write+0xf5/0x1e0
[ 2915.114567][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.114567][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.114567][   T72] 
[ 2915.116476][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2915.116476][   T72]      netdev_get_by_index+0x5e/0x80
[ 2915.116476][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2915.116476][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2915.116476][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2915.116476][   T72]      ipv6_add_addr+0x411/0x2000
[ 2915.116476][   T72]      inet6_addr_add+0x30e/0xa40
[ 2915.116476][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2915.116476][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.116476][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.116476][   T72]      netlink_unicast+0x449/0x710
[ 2915.116476][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.116476][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.116476][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.116476][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.116476][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.116476][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.116476][   T72] 
[ 2915.118452][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2915.118452][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2915.118452][   T72]      ipv6_find_idev+0x102/0x170
[ 2915.118452][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2915.118452][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.118452][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.118452][   T72]      netlink_unicast+0x449/0x710
[ 2915.118452][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.118452][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.118452][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.118452][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.118452][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.118452][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.118452][   T72] 
[ 2915.119961][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2915.119961][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2915.119961][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2915.119961][   T72]      ipv6_find_idev+0x102/0x170
[ 2915.119961][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2915.119961][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2915.119961][   T72]      netlink_rcv_skb+0x130/0x360
[ 2915.119961][   T72]      netlink_unicast+0x449/0x710
[ 2915.119961][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2915.119961][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2915.119961][   T72]      ___sys_sendmsg+0xee/0x170
[ 2915.119961][   T72]      __sys_sendmsg+0xcd/0x170
[ 2915.119961][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.119961][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.119961][   T72] 
[ 2915.121998][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2915.122238][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2915.122238][   T72]      dst_init+0x84/0x4a0
[ 2915.122238][   T72]      dst_alloc+0x97/0x150
[ 2915.122238][   T72]      ip6_dst_alloc+0x23/0x90
[ 2915.122238][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2915.122238][   T72]      ip6_pol_route+0x56f/0x840
[ 2915.122238][   T72]      fib6_rule_lookup+0x227/0x600
[ 2915.122238][   T72]      ip6_route_output_flags+0x251/0x460
[ 2915.122238][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2915.122238][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2915.122238][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2915.122238][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2915.122238][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2915.122238][   T72]      __sys_connect+0x217/0x2a0
[ 2915.122238][   T72]      __x64_sys_connect+0x72/0xb0
[ 2915.122238][   T72]      do_syscall_64+0xc6/0x1e0
[ 2915.122238][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2915.122238][   T72] 
[ 2925.372639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2925.373019][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2925.373019][   T72]      netdev_get_by_index+0x5e/0x80
[ 2925.373019][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2925.373019][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2925.373019][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2925.373019][   T72]      ipv6_add_addr+0x411/0x2000
[ 2925.373019][   T72]      inet6_addr_add+0x30e/0xa40
[ 2925.373019][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2925.373019][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.373019][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.373019][   T72]      netlink_unicast+0x449/0x710
[ 2925.373019][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.373019][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.373019][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.373019][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.373019][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.373019][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.373019][   T72] 
[ 2925.375013][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2925.375013][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2925.375013][   T72]      ipv6_find_idev+0x102/0x170
[ 2925.375013][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2925.375013][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.375013][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.375013][   T72]      netlink_unicast+0x449/0x710
[ 2925.375013][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.375013][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.375013][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.375013][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.375013][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.375013][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.375013][   T72] 
[ 2925.376568][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2925.376568][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2925.376568][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2925.376568][   T72]      ipv6_find_idev+0x102/0x170
[ 2925.376568][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2925.376568][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.376568][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.376568][   T72]      netlink_unicast+0x449/0x710
[ 2925.376568][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.376568][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.376568][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.376568][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.376568][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.376568][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.376568][   T72] 
[ 2925.378238][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2925.378503][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2925.378503][   T72]      netdev_get_by_index+0x5e/0x80
[ 2925.378503][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2925.378503][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2925.378503][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2925.378503][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2925.378503][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2925.378503][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2925.378503][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2925.378503][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2925.378503][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2925.378503][   T72]      vfs_write+0x9e5/0x10a0
[ 2925.378503][   T72]      ksys_write+0xf5/0x1e0
[ 2925.378503][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.378503][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.378503][   T72] 
[ 2925.380333][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2925.380333][   T72]      netdev_get_by_index+0x5e/0x80
[ 2925.380333][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2925.380333][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2925.380333][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2925.380333][   T72]      ipv6_add_addr+0x411/0x2000
[ 2925.380333][   T72]      inet6_addr_add+0x30e/0xa40
[ 2925.380333][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2925.380333][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.380333][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.380333][   T72]      netlink_unicast+0x449/0x710
[ 2925.380333][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.380333][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.380333][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.380333][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.380333][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.380333][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.380333][   T72] 
[ 2925.382309][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2925.382309][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2925.382309][   T72]      ipv6_find_idev+0x102/0x170
[ 2925.382309][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2925.382309][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.382309][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.382309][   T72]      netlink_unicast+0x449/0x710
[ 2925.382309][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.382309][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.382309][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.382309][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.382309][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.382309][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.382309][   T72] 
[ 2925.383830][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2925.383830][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2925.383830][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2925.383830][   T72]      ipv6_find_idev+0x102/0x170
[ 2925.383830][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2925.383830][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2925.383830][   T72]      netlink_rcv_skb+0x130/0x360
[ 2925.383830][   T72]      netlink_unicast+0x449/0x710
[ 2925.383830][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2925.383830][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2925.383830][   T72]      ___sys_sendmsg+0xee/0x170
[ 2925.383830][   T72]      __sys_sendmsg+0xcd/0x170
[ 2925.383830][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.383830][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.383830][   T72] 
[ 2925.385497][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2925.385758][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2925.385758][   T72]      dst_init+0x84/0x4a0
[ 2925.385758][   T72]      dst_alloc+0x97/0x150
[ 2925.385758][   T72]      ip6_dst_alloc+0x23/0x90
[ 2925.385758][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2925.385758][   T72]      ip6_pol_route+0x56f/0x840
[ 2925.385758][   T72]      fib6_rule_lookup+0x227/0x600
[ 2925.385758][   T72]      ip6_route_output_flags+0x251/0x460
[ 2925.385758][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2925.385758][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2925.385758][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2925.385758][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2925.385758][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2925.385758][   T72]      __sys_connect+0x217/0x2a0
[ 2925.385758][   T72]      __x64_sys_connect+0x72/0xb0
[ 2925.385758][   T72]      do_syscall_64+0xc6/0x1e0
[ 2925.385758][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2925.385758][   T72] 
[ 2935.636697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2935.637169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2935.637169][   T72]      netdev_get_by_index+0x5e/0x80
[ 2935.637169][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2935.637169][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2935.637169][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2935.637169][   T72]      ipv6_add_addr+0x411/0x2000
[ 2935.637169][   T72]      inet6_addr_add+0x30e/0xa40
[ 2935.637169][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2935.637169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.637169][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.637169][   T72]      netlink_unicast+0x449/0x710
[ 2935.637169][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.637169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.637169][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.637169][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.637169][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.637169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.637169][   T72] 
[ 2935.639187][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2935.639187][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2935.639187][   T72]      ipv6_find_idev+0x102/0x170
[ 2935.639187][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2935.639187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.639187][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.639187][   T72]      netlink_unicast+0x449/0x710
[ 2935.639187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.639187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.639187][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.639187][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.639187][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.639187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.639187][   T72] 
[ 2935.640733][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2935.640733][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2935.640733][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2935.640733][   T72]      ipv6_find_idev+0x102/0x170
[ 2935.640733][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2935.640733][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.640733][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.640733][   T72]      netlink_unicast+0x449/0x710
[ 2935.640733][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.640733][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.640733][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.640733][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.640733][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.640733][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.640733][   T72] 
[ 2935.642430][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2935.642722][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2935.642722][   T72]      netdev_get_by_index+0x5e/0x80
[ 2935.642722][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2935.642722][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2935.642722][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2935.642722][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2935.642722][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2935.642722][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2935.642722][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2935.642722][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2935.642722][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2935.642722][   T72]      vfs_write+0x9e5/0x10a0
[ 2935.642722][   T72]      ksys_write+0xf5/0x1e0
[ 2935.642722][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.642722][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.642722][   T72] 
[ 2935.644584][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2935.644584][   T72]      netdev_get_by_index+0x5e/0x80
[ 2935.644584][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2935.644584][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2935.644584][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2935.644584][   T72]      ipv6_add_addr+0x411/0x2000
[ 2935.644584][   T72]      inet6_addr_add+0x30e/0xa40
[ 2935.644584][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2935.644584][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.644584][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.644584][   T72]      netlink_unicast+0x449/0x710
[ 2935.644584][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.644584][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.644584][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.644584][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.644584][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.644584][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.644584][   T72] 
[ 2935.646589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2935.646589][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2935.646589][   T72]      ipv6_find_idev+0x102/0x170
[ 2935.646589][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2935.646589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.646589][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.646589][   T72]      netlink_unicast+0x449/0x710
[ 2935.646589][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.646589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.646589][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.646589][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.646589][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.646589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.646589][   T72] 
[ 2935.648116][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2935.648116][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2935.648116][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2935.648116][   T72]      ipv6_find_idev+0x102/0x170
[ 2935.648116][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2935.648116][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2935.648116][   T72]      netlink_rcv_skb+0x130/0x360
[ 2935.648116][   T72]      netlink_unicast+0x449/0x710
[ 2935.648116][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2935.648116][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2935.648116][   T72]      ___sys_sendmsg+0xee/0x170
[ 2935.648116][   T72]      __sys_sendmsg+0xcd/0x170
[ 2935.648116][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.648116][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.648116][   T72] 
[ 2935.649790][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2935.650037][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2935.650037][   T72]      dst_init+0x84/0x4a0
[ 2935.650037][   T72]      dst_alloc+0x97/0x150
[ 2935.650037][   T72]      ip6_dst_alloc+0x23/0x90
[ 2935.650037][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2935.650037][   T72]      ip6_pol_route+0x56f/0x840
[ 2935.650037][   T72]      fib6_rule_lookup+0x227/0x600
[ 2935.650037][   T72]      ip6_route_output_flags+0x251/0x460
[ 2935.650037][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2935.650037][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2935.650037][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2935.650037][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2935.650037][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2935.650037][   T72]      __sys_connect+0x217/0x2a0
[ 2935.650037][   T72]      __x64_sys_connect+0x72/0xb0
[ 2935.650037][   T72]      do_syscall_64+0xc6/0x1e0
[ 2935.650037][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2935.650037][   T72] 
[ 2945.652675][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2945.653114][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2945.653114][   T72]      netdev_get_by_index+0x5e/0x80
[ 2945.653114][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2945.653114][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2945.653114][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2945.653114][   T72]      ipv6_add_addr+0x411/0x2000
[ 2945.653114][   T72]      inet6_addr_add+0x30e/0xa40
[ 2945.653114][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2945.653114][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.653114][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.653114][   T72]      netlink_unicast+0x449/0x710
[ 2945.653114][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.653114][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.653114][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.653114][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.653114][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.653114][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.653114][   T72] 
[ 2945.655103][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2945.655103][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2945.655103][   T72]      ipv6_find_idev+0x102/0x170
[ 2945.655103][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2945.655103][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.655103][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.655103][   T72]      netlink_unicast+0x449/0x710
[ 2945.655103][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.655103][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.655103][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.655103][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.655103][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.655103][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.655103][   T72] 
[ 2945.656644][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2945.656644][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2945.656644][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2945.656644][   T72]      ipv6_find_idev+0x102/0x170
[ 2945.656644][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2945.656644][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.656644][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.656644][   T72]      netlink_unicast+0x449/0x710
[ 2945.656644][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.656644][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.656644][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.656644][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.656644][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.656644][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.656644][   T72] 
[ 2945.658307][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2945.658568][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2945.658568][   T72]      netdev_get_by_index+0x5e/0x80
[ 2945.658568][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2945.658568][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2945.658568][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2945.658568][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2945.658568][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2945.658568][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2945.658568][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2945.658568][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2945.658568][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2945.658568][   T72]      vfs_write+0x9e5/0x10a0
[ 2945.658568][   T72]      ksys_write+0xf5/0x1e0
[ 2945.658568][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.658568][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.658568][   T72] 
[ 2945.660386][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2945.660386][   T72]      netdev_get_by_index+0x5e/0x80
[ 2945.660386][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2945.660386][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2945.660386][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2945.660386][   T72]      ipv6_add_addr+0x411/0x2000
[ 2945.660386][   T72]      inet6_addr_add+0x30e/0xa40
[ 2945.660386][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2945.660386][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.660386][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.660386][   T72]      netlink_unicast+0x449/0x710
[ 2945.660386][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.660386][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.660386][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.660386][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.660386][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.660386][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.660386][   T72] 
[ 2945.662342][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2945.662342][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2945.662342][   T72]      ipv6_find_idev+0x102/0x170
[ 2945.662342][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2945.662342][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.662342][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.662342][   T72]      netlink_unicast+0x449/0x710
[ 2945.662342][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.662342][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.662342][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.662342][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.662342][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.662342][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.662342][   T72] 
[ 2945.663850][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2945.663850][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2945.663850][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2945.663850][   T72]      ipv6_find_idev+0x102/0x170
[ 2945.663850][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2945.663850][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2945.663850][   T72]      netlink_rcv_skb+0x130/0x360
[ 2945.663850][   T72]      netlink_unicast+0x449/0x710
[ 2945.663850][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2945.663850][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2945.663850][   T72]      ___sys_sendmsg+0xee/0x170
[ 2945.663850][   T72]      __sys_sendmsg+0xcd/0x170
[ 2945.663850][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.663850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.663850][   T72] 
[ 2945.665504][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2945.665759][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2945.665759][   T72]      dst_init+0x84/0x4a0
[ 2945.665759][   T72]      dst_alloc+0x97/0x150
[ 2945.665759][   T72]      ip6_dst_alloc+0x23/0x90
[ 2945.665759][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2945.665759][   T72]      ip6_pol_route+0x56f/0x840
[ 2945.665759][   T72]      fib6_rule_lookup+0x227/0x600
[ 2945.665759][   T72]      ip6_route_output_flags+0x251/0x460
[ 2945.665759][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2945.665759][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2945.665759][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2945.665759][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2945.665759][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2945.665759][   T72]      __sys_connect+0x217/0x2a0
[ 2945.665759][   T72]      __x64_sys_connect+0x72/0xb0
[ 2945.665759][   T72]      do_syscall_64+0xc6/0x1e0
[ 2945.665759][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2945.665759][   T72] 
[ 2955.908695][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2955.909126][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2955.909126][   T72]      netdev_get_by_index+0x5e/0x80
[ 2955.909126][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2955.909126][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2955.909126][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2955.909126][   T72]      ipv6_add_addr+0x411/0x2000
[ 2955.909126][   T72]      inet6_addr_add+0x30e/0xa40
[ 2955.909126][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2955.909126][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.909126][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.909126][   T72]      netlink_unicast+0x449/0x710
[ 2955.909126][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.909126][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.909126][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.909126][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.909126][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.909126][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.909126][   T72] 
[ 2955.911100][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2955.911100][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2955.911100][   T72]      ipv6_find_idev+0x102/0x170
[ 2955.911100][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2955.911100][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.911100][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.911100][   T72]      netlink_unicast+0x449/0x710
[ 2955.911100][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.911100][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.911100][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.911100][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.911100][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.911100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.911100][   T72] 
[ 2955.912617][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2955.912617][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2955.912617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2955.912617][   T72]      ipv6_find_idev+0x102/0x170
[ 2955.912617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2955.912617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.912617][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.912617][   T72]      netlink_unicast+0x449/0x710
[ 2955.912617][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.912617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.912617][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.912617][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.912617][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.912617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.912617][   T72] 
[ 2955.914279][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2955.914544][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2955.914544][   T72]      netdev_get_by_index+0x5e/0x80
[ 2955.914544][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2955.914544][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2955.914544][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2955.914544][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2955.914544][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2955.914544][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2955.914544][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2955.914544][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2955.914544][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2955.914544][   T72]      vfs_write+0x9e5/0x10a0
[ 2955.914544][   T72]      ksys_write+0xf5/0x1e0
[ 2955.914544][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.914544][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.914544][   T72] 
[ 2955.916377][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2955.916377][   T72]      netdev_get_by_index+0x5e/0x80
[ 2955.916377][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2955.916377][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2955.916377][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2955.916377][   T72]      ipv6_add_addr+0x411/0x2000
[ 2955.916377][   T72]      inet6_addr_add+0x30e/0xa40
[ 2955.916377][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2955.916377][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.916377][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.916377][   T72]      netlink_unicast+0x449/0x710
[ 2955.916377][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.916377][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.916377][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.916377][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.916377][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.916377][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.916377][   T72] 
[ 2955.918342][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2955.918342][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2955.918342][   T72]      ipv6_find_idev+0x102/0x170
[ 2955.918342][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2955.918342][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.918342][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.918342][   T72]      netlink_unicast+0x449/0x710
[ 2955.918342][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.918342][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.918342][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.918342][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.918342][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.918342][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.918342][   T72] 
[ 2955.919845][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2955.919845][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2955.919845][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2955.919845][   T72]      ipv6_find_idev+0x102/0x170
[ 2955.919845][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2955.919845][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2955.919845][   T72]      netlink_rcv_skb+0x130/0x360
[ 2955.919845][   T72]      netlink_unicast+0x449/0x710
[ 2955.919845][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2955.919845][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2955.919845][   T72]      ___sys_sendmsg+0xee/0x170
[ 2955.919845][   T72]      __sys_sendmsg+0xcd/0x170
[ 2955.919845][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.919845][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.919845][   T72] 
[ 2955.921507][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2955.921752][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2955.921752][   T72]      dst_init+0x84/0x4a0
[ 2955.921752][   T72]      dst_alloc+0x97/0x150
[ 2955.921752][   T72]      ip6_dst_alloc+0x23/0x90
[ 2955.921752][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2955.921752][   T72]      ip6_pol_route+0x56f/0x840
[ 2955.921752][   T72]      fib6_rule_lookup+0x227/0x600
[ 2955.921752][   T72]      ip6_route_output_flags+0x251/0x460
[ 2955.921752][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2955.921752][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2955.921752][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2955.921752][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2955.921752][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2955.921752][   T72]      __sys_connect+0x217/0x2a0
[ 2955.921752][   T72]      __x64_sys_connect+0x72/0xb0
[ 2955.921752][   T72]      do_syscall_64+0xc6/0x1e0
[ 2955.921752][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2955.921752][   T72] 
[ 2966.148700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2966.149132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2966.149132][   T72]      netdev_get_by_index+0x5e/0x80
[ 2966.149132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2966.149132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2966.149132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2966.149132][   T72]      ipv6_add_addr+0x411/0x2000
[ 2966.149132][   T72]      inet6_addr_add+0x30e/0xa40
[ 2966.149132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2966.149132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.149132][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.149132][   T72]      netlink_unicast+0x449/0x710
[ 2966.149132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.149132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.149132][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.149132][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.149132][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.149132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.149132][   T72] 
[ 2966.151108][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2966.151108][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2966.151108][   T72]      ipv6_find_idev+0x102/0x170
[ 2966.151108][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2966.151108][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.151108][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.151108][   T72]      netlink_unicast+0x449/0x710
[ 2966.151108][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.151108][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.151108][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.151108][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.151108][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.151108][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.151108][   T72] 
[ 2966.152624][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2966.152624][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2966.152624][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2966.152624][   T72]      ipv6_find_idev+0x102/0x170
[ 2966.152624][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2966.152624][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.152624][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.152624][   T72]      netlink_unicast+0x449/0x710
[ 2966.152624][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.152624][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.152624][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.152624][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.152624][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.152624][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.152624][   T72] 
[ 2966.154283][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2966.154549][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2966.154549][   T72]      netdev_get_by_index+0x5e/0x80
[ 2966.154549][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2966.154549][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2966.154549][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2966.154549][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2966.154549][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2966.154549][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2966.154549][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2966.154549][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2966.154549][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2966.154549][   T72]      vfs_write+0x9e5/0x10a0
[ 2966.154549][   T72]      ksys_write+0xf5/0x1e0
[ 2966.154549][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.154549][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.154549][   T72] 
[ 2966.156373][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2966.156373][   T72]      netdev_get_by_index+0x5e/0x80
[ 2966.156373][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2966.156373][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2966.156373][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2966.156373][   T72]      ipv6_add_addr+0x411/0x2000
[ 2966.156373][   T72]      inet6_addr_add+0x30e/0xa40
[ 2966.156373][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2966.156373][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.156373][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.156373][   T72]      netlink_unicast+0x449/0x710
[ 2966.156373][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.156373][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.156373][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.156373][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.156373][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.156373][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.156373][   T72] 
[ 2966.158328][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2966.158328][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2966.158328][   T72]      ipv6_find_idev+0x102/0x170
[ 2966.158328][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2966.158328][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.158328][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.158328][   T72]      netlink_unicast+0x449/0x710
[ 2966.158328][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.158328][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.158328][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.158328][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.158328][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.158328][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.158328][   T72] 
[ 2966.159827][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2966.159827][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2966.159827][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2966.159827][   T72]      ipv6_find_idev+0x102/0x170
[ 2966.159827][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2966.159827][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2966.159827][   T72]      netlink_rcv_skb+0x130/0x360
[ 2966.159827][   T72]      netlink_unicast+0x449/0x710
[ 2966.159827][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2966.159827][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2966.159827][   T72]      ___sys_sendmsg+0xee/0x170
[ 2966.159827][   T72]      __sys_sendmsg+0xcd/0x170
[ 2966.159827][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.159827][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.159827][   T72] 
[ 2966.161474][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2966.161726][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2966.161726][   T72]      dst_init+0x84/0x4a0
[ 2966.161726][   T72]      dst_alloc+0x97/0x150
[ 2966.161726][   T72]      ip6_dst_alloc+0x23/0x90
[ 2966.161726][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2966.161726][   T72]      ip6_pol_route+0x56f/0x840
[ 2966.161726][   T72]      fib6_rule_lookup+0x227/0x600
[ 2966.161726][   T72]      ip6_route_output_flags+0x251/0x460
[ 2966.161726][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2966.161726][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2966.161726][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2966.161726][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2966.161726][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2966.161726][   T72]      __sys_connect+0x217/0x2a0
[ 2966.161726][   T72]      __x64_sys_connect+0x72/0xb0
[ 2966.161726][   T72]      do_syscall_64+0xc6/0x1e0
[ 2966.161726][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2966.161726][   T72] 
[ 2976.404722][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2976.405159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2976.405159][   T72]      netdev_get_by_index+0x5e/0x80
[ 2976.405159][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2976.405159][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2976.405159][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2976.405159][   T72]      ipv6_add_addr+0x411/0x2000
[ 2976.405159][   T72]      inet6_addr_add+0x30e/0xa40
[ 2976.405159][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2976.405159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.405159][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.405159][   T72]      netlink_unicast+0x449/0x710
[ 2976.405159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.405159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.405159][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.405159][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.405159][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.405159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.405159][   T72] 
[ 2976.407133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2976.407133][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2976.407133][   T72]      ipv6_find_idev+0x102/0x170
[ 2976.407133][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2976.407133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.407133][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.407133][   T72]      netlink_unicast+0x449/0x710
[ 2976.407133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.407133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.407133][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.407133][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.407133][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.407133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.407133][   T72] 
[ 2976.408657][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2976.408657][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2976.408657][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2976.408657][   T72]      ipv6_find_idev+0x102/0x170
[ 2976.408657][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2976.408657][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.408657][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.408657][   T72]      netlink_unicast+0x449/0x710
[ 2976.408657][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.408657][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.408657][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.408657][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.408657][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.408657][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.408657][   T72] 
[ 2976.410312][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2976.410573][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2976.410573][   T72]      netdev_get_by_index+0x5e/0x80
[ 2976.410573][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2976.410573][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2976.410573][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2976.410573][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2976.410573][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2976.410573][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2976.410573][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2976.410573][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2976.410573][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2976.410573][   T72]      vfs_write+0x9e5/0x10a0
[ 2976.410573][   T72]      ksys_write+0xf5/0x1e0
[ 2976.410573][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.410573][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.410573][   T72] 
[ 2976.412388][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2976.412388][   T72]      netdev_get_by_index+0x5e/0x80
[ 2976.412388][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2976.412388][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2976.412388][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2976.412388][   T72]      ipv6_add_addr+0x411/0x2000
[ 2976.412388][   T72]      inet6_addr_add+0x30e/0xa40
[ 2976.412388][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2976.412388][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.412388][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.412388][   T72]      netlink_unicast+0x449/0x710
[ 2976.412388][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.412388][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.412388][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.412388][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.412388][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.412388][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.412388][   T72] 
[ 2976.414339][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2976.414339][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2976.414339][   T72]      ipv6_find_idev+0x102/0x170
[ 2976.414339][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2976.414339][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.414339][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.414339][   T72]      netlink_unicast+0x449/0x710
[ 2976.414339][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.414339][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.414339][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.414339][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.414339][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.414339][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.414339][   T72] 
[ 2976.415841][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2976.415841][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2976.415841][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2976.415841][   T72]      ipv6_find_idev+0x102/0x170
[ 2976.415841][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2976.415841][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2976.415841][   T72]      netlink_rcv_skb+0x130/0x360
[ 2976.415841][   T72]      netlink_unicast+0x449/0x710
[ 2976.415841][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2976.415841][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2976.415841][   T72]      ___sys_sendmsg+0xee/0x170
[ 2976.415841][   T72]      __sys_sendmsg+0xcd/0x170
[ 2976.415841][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.415841][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.415841][   T72] 
[ 2976.417506][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2976.417757][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2976.417757][   T72]      dst_init+0x84/0x4a0
[ 2976.417757][   T72]      dst_alloc+0x97/0x150
[ 2976.417757][   T72]      ip6_dst_alloc+0x23/0x90
[ 2976.417757][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2976.417757][   T72]      ip6_pol_route+0x56f/0x840
[ 2976.417757][   T72]      fib6_rule_lookup+0x227/0x600
[ 2976.417757][   T72]      ip6_route_output_flags+0x251/0x460
[ 2976.417757][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2976.417757][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2976.417757][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2976.417757][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2976.417757][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2976.417757][   T72]      __sys_connect+0x217/0x2a0
[ 2976.417757][   T72]      __x64_sys_connect+0x72/0xb0
[ 2976.417757][   T72]      do_syscall_64+0xc6/0x1e0
[ 2976.417757][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2976.417757][   T72] 
[ 2986.660654][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2986.661117][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2986.661117][   T72]      netdev_get_by_index+0x5e/0x80
[ 2986.661117][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2986.661117][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2986.661117][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2986.661117][   T72]      ipv6_add_addr+0x411/0x2000
[ 2986.661117][   T72]      inet6_addr_add+0x30e/0xa40
[ 2986.661117][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2986.661117][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.661117][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.661117][   T72]      netlink_unicast+0x449/0x710
[ 2986.661117][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.661117][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.661117][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.661117][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.661117][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.661117][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.661117][   T72] 
[ 2986.663592][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2986.663592][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2986.663592][   T72]      ipv6_find_idev+0x102/0x170
[ 2986.663592][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2986.663592][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.663592][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.663592][   T72]      netlink_unicast+0x449/0x710
[ 2986.663592][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.663592][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.663592][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.663592][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.663592][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.663592][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.663592][   T72] 
[ 2986.665106][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2986.665106][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2986.665106][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2986.665106][   T72]      ipv6_find_idev+0x102/0x170
[ 2986.665106][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2986.665106][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.665106][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.665106][   T72]      netlink_unicast+0x449/0x710
[ 2986.665106][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.665106][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.665106][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.665106][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.665106][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.665106][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.665106][   T72] 
[ 2986.666778][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2986.667042][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2986.667042][   T72]      netdev_get_by_index+0x5e/0x80
[ 2986.667042][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2986.667042][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2986.667042][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2986.667042][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2986.667042][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2986.667042][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2986.667042][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2986.667042][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2986.667042][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2986.667042][   T72]      vfs_write+0x9e5/0x10a0
[ 2986.667042][   T72]      ksys_write+0xf5/0x1e0
[ 2986.667042][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.667042][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.667042][   T72] 
[ 2986.668856][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2986.668856][   T72]      netdev_get_by_index+0x5e/0x80
[ 2986.668856][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2986.668856][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2986.668856][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2986.668856][   T72]      ipv6_add_addr+0x411/0x2000
[ 2986.668856][   T72]      inet6_addr_add+0x30e/0xa40
[ 2986.668856][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2986.668856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.668856][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.668856][   T72]      netlink_unicast+0x449/0x710
[ 2986.668856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.668856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.668856][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.668856][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.668856][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.668856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.668856][   T72] 
[ 2986.670808][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2986.670808][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2986.670808][   T72]      ipv6_find_idev+0x102/0x170
[ 2986.670808][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2986.670808][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.670808][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.670808][   T72]      netlink_unicast+0x449/0x710
[ 2986.670808][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.670808][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.670808][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.670808][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.670808][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.670808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.670808][   T72] 
[ 2986.672313][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2986.672313][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2986.672313][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2986.672313][   T72]      ipv6_find_idev+0x102/0x170
[ 2986.672313][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2986.672313][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2986.672313][   T72]      netlink_rcv_skb+0x130/0x360
[ 2986.672313][   T72]      netlink_unicast+0x449/0x710
[ 2986.672313][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2986.672313][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2986.672313][   T72]      ___sys_sendmsg+0xee/0x170
[ 2986.672313][   T72]      __sys_sendmsg+0xcd/0x170
[ 2986.672313][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.672313][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.672313][   T72] 
[ 2986.695508][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2986.695777][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2986.695777][   T72]      dst_init+0x84/0x4a0
[ 2986.695777][   T72]      dst_alloc+0x97/0x150
[ 2986.695777][   T72]      ip6_dst_alloc+0x23/0x90
[ 2986.695777][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2986.695777][   T72]      ip6_pol_route+0x56f/0x840
[ 2986.695777][   T72]      fib6_rule_lookup+0x227/0x600
[ 2986.695777][   T72]      ip6_route_output_flags+0x251/0x460
[ 2986.695777][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2986.695777][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2986.695777][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2986.695777][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2986.695777][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2986.695777][   T72]      __sys_connect+0x217/0x2a0
[ 2986.695777][   T72]      __x64_sys_connect+0x72/0xb0
[ 2986.695777][   T72]      do_syscall_64+0xc6/0x1e0
[ 2986.695777][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2986.695777][   T72] 
[ 2996.772798][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 2996.773298][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2996.773298][   T72]      netdev_get_by_index+0x5e/0x80
[ 2996.773298][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2996.773298][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2996.773298][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2996.773298][   T72]      ipv6_add_addr+0x411/0x2000
[ 2996.773298][   T72]      inet6_addr_add+0x30e/0xa40
[ 2996.773298][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2996.773298][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.773298][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.773298][   T72]      netlink_unicast+0x449/0x710
[ 2996.773298][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.773298][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.773298][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.773298][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.773298][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.773298][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.773298][   T72] 
[ 2996.775937][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2996.775937][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2996.775937][   T72]      ipv6_find_idev+0x102/0x170
[ 2996.775937][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2996.775937][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.775937][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.775937][   T72]      netlink_unicast+0x449/0x710
[ 2996.775937][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.775937][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.775937][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.775937][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.775937][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.775937][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.775937][   T72] 
[ 2996.777615][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 2996.777615][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2996.777615][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2996.777615][   T72]      ipv6_find_idev+0x102/0x170
[ 2996.777615][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2996.777615][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.777615][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.777615][   T72]      netlink_unicast+0x449/0x710
[ 2996.777615][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.777615][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.777615][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.777615][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.777615][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.777615][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.777615][   T72] 
[ 2996.779287][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 2996.779553][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2996.779553][   T72]      netdev_get_by_index+0x5e/0x80
[ 2996.779553][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2996.779553][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2996.779553][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 2996.779553][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 2996.779553][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 2996.779553][   T72]      dev_forward_change+0x2a6/0x7b0
[ 2996.779553][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 2996.779553][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 2996.779553][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 2996.779553][   T72]      vfs_write+0x9e5/0x10a0
[ 2996.779553][   T72]      ksys_write+0xf5/0x1e0
[ 2996.779553][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.779553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.779553][   T72] 
[ 2996.781386][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2996.781386][   T72]      netdev_get_by_index+0x5e/0x80
[ 2996.781386][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 2996.781386][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 2996.781386][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 2996.781386][   T72]      ipv6_add_addr+0x411/0x2000
[ 2996.781386][   T72]      inet6_addr_add+0x30e/0xa40
[ 2996.781386][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 2996.781386][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.781386][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.781386][   T72]      netlink_unicast+0x449/0x710
[ 2996.781386][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.781386][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.781386][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.781386][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.781386][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.781386][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.781386][   T72] 
[ 2996.783348][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2996.783348][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 2996.783348][   T72]      ipv6_find_idev+0x102/0x170
[ 2996.783348][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2996.783348][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.783348][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.783348][   T72]      netlink_unicast+0x449/0x710
[ 2996.783348][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.783348][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.783348][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.783348][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.783348][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.783348][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.783348][   T72] 
[ 2996.784856][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 2996.784856][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 2996.784856][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 2996.784856][   T72]      ipv6_find_idev+0x102/0x170
[ 2996.784856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 2996.784856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 2996.784856][   T72]      netlink_rcv_skb+0x130/0x360
[ 2996.784856][   T72]      netlink_unicast+0x449/0x710
[ 2996.784856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 2996.784856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 2996.784856][   T72]      ___sys_sendmsg+0xee/0x170
[ 2996.784856][   T72]      __sys_sendmsg+0xcd/0x170
[ 2996.784856][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.784856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.784856][   T72] 
[ 2996.786542][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 2996.786792][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 2996.786792][   T72]      dst_init+0x84/0x4a0
[ 2996.786792][   T72]      dst_alloc+0x97/0x150
[ 2996.786792][   T72]      ip6_dst_alloc+0x23/0x90
[ 2996.786792][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 2996.786792][   T72]      ip6_pol_route+0x56f/0x840
[ 2996.786792][   T72]      fib6_rule_lookup+0x227/0x600
[ 2996.786792][   T72]      ip6_route_output_flags+0x251/0x460
[ 2996.786792][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 2996.786792][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 2996.786792][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 2996.786792][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 2996.786792][   T72]      ip6_datagram_connect+0x2c/0x50
[ 2996.786792][   T72]      __sys_connect+0x217/0x2a0
[ 2996.786792][   T72]      __x64_sys_connect+0x72/0xb0
[ 2996.786792][   T72]      do_syscall_64+0xc6/0x1e0
[ 2996.786792][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 2996.786792][   T72] 
[ 3006.884723][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3006.885096][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3006.885096][   T72]      netdev_get_by_index+0x5e/0x80
[ 3006.885096][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3006.885096][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3006.885096][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3006.885096][   T72]      ipv6_add_addr+0x411/0x2000
[ 3006.885096][   T72]      inet6_addr_add+0x30e/0xa40
[ 3006.885096][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3006.885096][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.885096][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.885096][   T72]      netlink_unicast+0x449/0x710
[ 3006.885096][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.885096][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.885096][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.885096][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.885096][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.885096][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.885096][   T72] 
[ 3006.887076][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3006.887076][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3006.887076][   T72]      ipv6_find_idev+0x102/0x170
[ 3006.887076][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3006.887076][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.887076][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.887076][   T72]      netlink_unicast+0x449/0x710
[ 3006.887076][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.887076][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.887076][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.887076][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.887076][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.887076][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.887076][   T72] 
[ 3006.888587][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3006.888587][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3006.888587][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3006.888587][   T72]      ipv6_find_idev+0x102/0x170
[ 3006.888587][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3006.888587][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.888587][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.888587][   T72]      netlink_unicast+0x449/0x710
[ 3006.888587][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.888587][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.888587][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.888587][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.888587][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.888587][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.888587][   T72] 
[ 3006.890244][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3006.890543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3006.890543][   T72]      netdev_get_by_index+0x5e/0x80
[ 3006.890543][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3006.890543][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3006.890543][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3006.890543][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3006.890543][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3006.890543][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3006.890543][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3006.890543][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3006.890543][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3006.890543][   T72]      vfs_write+0x9e5/0x10a0
[ 3006.890543][   T72]      ksys_write+0xf5/0x1e0
[ 3006.890543][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.890543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.890543][   T72] 
[ 3006.892385][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3006.892385][   T72]      netdev_get_by_index+0x5e/0x80
[ 3006.892385][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3006.892385][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3006.892385][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3006.892385][   T72]      ipv6_add_addr+0x411/0x2000
[ 3006.892385][   T72]      inet6_addr_add+0x30e/0xa40
[ 3006.892385][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3006.892385][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.892385][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.892385][   T72]      netlink_unicast+0x449/0x710
[ 3006.892385][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.892385][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.892385][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.892385][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.892385][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.892385][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.892385][   T72] 
[ 3006.894339][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3006.894339][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3006.894339][   T72]      ipv6_find_idev+0x102/0x170
[ 3006.894339][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3006.894339][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.894339][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.894339][   T72]      netlink_unicast+0x449/0x710
[ 3006.894339][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.894339][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.894339][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.894339][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.894339][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.894339][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.894339][   T72] 
[ 3006.895846][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3006.895846][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3006.895846][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3006.895846][   T72]      ipv6_find_idev+0x102/0x170
[ 3006.895846][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3006.895846][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3006.895846][   T72]      netlink_rcv_skb+0x130/0x360
[ 3006.895846][   T72]      netlink_unicast+0x449/0x710
[ 3006.895846][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3006.895846][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3006.895846][   T72]      ___sys_sendmsg+0xee/0x170
[ 3006.895846][   T72]      __sys_sendmsg+0xcd/0x170
[ 3006.895846][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.895846][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.895846][   T72] 
[ 3006.897498][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3006.897742][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3006.897742][   T72]      dst_init+0x84/0x4a0
[ 3006.897742][   T72]      dst_alloc+0x97/0x150
[ 3006.897742][   T72]      ip6_dst_alloc+0x23/0x90
[ 3006.897742][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3006.897742][   T72]      ip6_pol_route+0x56f/0x840
[ 3006.897742][   T72]      fib6_rule_lookup+0x227/0x600
[ 3006.897742][   T72]      ip6_route_output_flags+0x251/0x460
[ 3006.897742][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3006.897742][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3006.897742][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3006.897742][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3006.897742][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3006.897742][   T72]      __sys_connect+0x217/0x2a0
[ 3006.897742][   T72]      __x64_sys_connect+0x72/0xb0
[ 3006.897742][   T72]      do_syscall_64+0xc6/0x1e0
[ 3006.897742][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3006.897742][   T72] 
[ 3017.092707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3017.093100][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3017.093100][   T72]      netdev_get_by_index+0x5e/0x80
[ 3017.093100][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3017.093100][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3017.093100][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3017.093100][   T72]      ipv6_add_addr+0x411/0x2000
[ 3017.093100][   T72]      inet6_addr_add+0x30e/0xa40
[ 3017.093100][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3017.093100][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.093100][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.093100][   T72]      netlink_unicast+0x449/0x710
[ 3017.093100][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.093100][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.093100][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.093100][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.093100][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.093100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.093100][   T72] 
[ 3017.095096][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3017.095096][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3017.095096][   T72]      ipv6_find_idev+0x102/0x170
[ 3017.095096][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3017.095096][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.095096][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.095096][   T72]      netlink_unicast+0x449/0x710
[ 3017.095096][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.095096][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.095096][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.095096][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.095096][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.095096][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.095096][   T72] 
[ 3017.096623][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3017.096623][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3017.096623][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3017.096623][   T72]      ipv6_find_idev+0x102/0x170
[ 3017.096623][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3017.096623][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.096623][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.096623][   T72]      netlink_unicast+0x449/0x710
[ 3017.096623][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.096623][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.096623][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.096623][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.096623][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.096623][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.096623][   T72] 
[ 3017.098301][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3017.098694][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3017.098694][   T72]      netdev_get_by_index+0x5e/0x80
[ 3017.098694][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3017.098694][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3017.098694][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3017.098694][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3017.098694][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3017.098694][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3017.098694][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3017.098694][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3017.098694][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3017.098694][   T72]      vfs_write+0x9e5/0x10a0
[ 3017.098694][   T72]      ksys_write+0xf5/0x1e0
[ 3017.098694][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.098694][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.098694][   T72] 
[ 3017.100509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3017.100509][   T72]      netdev_get_by_index+0x5e/0x80
[ 3017.100509][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3017.100509][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3017.100509][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3017.100509][   T72]      ipv6_add_addr+0x411/0x2000
[ 3017.100509][   T72]      inet6_addr_add+0x30e/0xa40
[ 3017.100509][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3017.100509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.100509][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.100509][   T72]      netlink_unicast+0x449/0x710
[ 3017.100509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.100509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.100509][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.100509][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.100509][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.100509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.100509][   T72] 
[ 3017.102473][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3017.102473][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3017.102473][   T72]      ipv6_find_idev+0x102/0x170
[ 3017.102473][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3017.102473][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.102473][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.102473][   T72]      netlink_unicast+0x449/0x710
[ 3017.102473][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.102473][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.102473][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.102473][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.102473][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.102473][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.102473][   T72] 
[ 3017.104028][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3017.104028][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3017.104028][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3017.104028][   T72]      ipv6_find_idev+0x102/0x170
[ 3017.104028][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3017.104028][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3017.104028][   T72]      netlink_rcv_skb+0x130/0x360
[ 3017.104028][   T72]      netlink_unicast+0x449/0x710
[ 3017.104028][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3017.104028][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3017.104028][   T72]      ___sys_sendmsg+0xee/0x170
[ 3017.104028][   T72]      __sys_sendmsg+0xcd/0x170
[ 3017.104028][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.104028][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.104028][   T72] 
[ 3017.105699][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3017.105937][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3017.105937][   T72]      dst_init+0x84/0x4a0
[ 3017.105937][   T72]      dst_alloc+0x97/0x150
[ 3017.105937][   T72]      ip6_dst_alloc+0x23/0x90
[ 3017.105937][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3017.105937][   T72]      ip6_pol_route+0x56f/0x840
[ 3017.105937][   T72]      fib6_rule_lookup+0x227/0x600
[ 3017.105937][   T72]      ip6_route_output_flags+0x251/0x460
[ 3017.105937][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3017.105937][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3017.105937][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3017.105937][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3017.105937][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3017.105937][   T72]      __sys_connect+0x217/0x2a0
[ 3017.105937][   T72]      __x64_sys_connect+0x72/0xb0
[ 3017.105937][   T72]      do_syscall_64+0xc6/0x1e0
[ 3017.105937][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3017.105937][   T72] 
[ 3027.348700][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3027.349137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3027.349137][   T72]      netdev_get_by_index+0x5e/0x80
[ 3027.349137][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3027.349137][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3027.349137][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3027.349137][   T72]      ipv6_add_addr+0x411/0x2000
[ 3027.349137][   T72]      inet6_addr_add+0x30e/0xa40
[ 3027.349137][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3027.349137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.349137][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.349137][   T72]      netlink_unicast+0x449/0x710
[ 3027.349137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.349137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.349137][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.349137][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.349137][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.349137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.349137][   T72] 
[ 3027.351130][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3027.351130][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3027.351130][   T72]      ipv6_find_idev+0x102/0x170
[ 3027.351130][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3027.351130][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.351130][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.351130][   T72]      netlink_unicast+0x449/0x710
[ 3027.351130][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.351130][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.351130][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.351130][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.351130][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.351130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.351130][   T72] 
[ 3027.352647][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3027.352647][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3027.352647][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3027.352647][   T72]      ipv6_find_idev+0x102/0x170
[ 3027.352647][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3027.352647][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.352647][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.352647][   T72]      netlink_unicast+0x449/0x710
[ 3027.352647][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.352647][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.352647][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.352647][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.352647][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.352647][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.352647][   T72] 
[ 3027.354314][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3027.354584][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3027.354584][   T72]      netdev_get_by_index+0x5e/0x80
[ 3027.354584][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3027.354584][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3027.354584][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3027.354584][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3027.354584][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3027.354584][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3027.354584][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3027.354584][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3027.354584][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3027.354584][   T72]      vfs_write+0x9e5/0x10a0
[ 3027.354584][   T72]      ksys_write+0xf5/0x1e0
[ 3027.354584][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.354584][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.354584][   T72] 
[ 3027.356418][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3027.356418][   T72]      netdev_get_by_index+0x5e/0x80
[ 3027.356418][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3027.356418][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3027.356418][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3027.356418][   T72]      ipv6_add_addr+0x411/0x2000
[ 3027.356418][   T72]      inet6_addr_add+0x30e/0xa40
[ 3027.356418][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3027.356418][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.356418][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.356418][   T72]      netlink_unicast+0x449/0x710
[ 3027.356418][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.356418][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.356418][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.356418][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.356418][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.356418][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.356418][   T72] 
[ 3027.358372][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3027.358372][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3027.358372][   T72]      ipv6_find_idev+0x102/0x170
[ 3027.358372][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3027.358372][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.358372][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.358372][   T72]      netlink_unicast+0x449/0x710
[ 3027.358372][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.358372][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.358372][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.358372][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.358372][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.358372][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.358372][   T72] 
[ 3027.359880][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3027.359880][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3027.359880][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3027.359880][   T72]      ipv6_find_idev+0x102/0x170
[ 3027.359880][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3027.359880][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3027.359880][   T72]      netlink_rcv_skb+0x130/0x360
[ 3027.359880][   T72]      netlink_unicast+0x449/0x710
[ 3027.359880][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3027.359880][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3027.359880][   T72]      ___sys_sendmsg+0xee/0x170
[ 3027.359880][   T72]      __sys_sendmsg+0xcd/0x170
[ 3027.359880][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.359880][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.359880][   T72] 
[ 3027.361528][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3027.361777][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3027.361777][   T72]      dst_init+0x84/0x4a0
[ 3027.361777][   T72]      dst_alloc+0x97/0x150
[ 3027.361777][   T72]      ip6_dst_alloc+0x23/0x90
[ 3027.361777][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3027.361777][   T72]      ip6_pol_route+0x56f/0x840
[ 3027.361777][   T72]      fib6_rule_lookup+0x227/0x600
[ 3027.361777][   T72]      ip6_route_output_flags+0x251/0x460
[ 3027.361777][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3027.361777][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3027.361777][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3027.361777][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3027.361777][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3027.361777][   T72]      __sys_connect+0x217/0x2a0
[ 3027.361777][   T72]      __x64_sys_connect+0x72/0xb0
[ 3027.361777][   T72]      do_syscall_64+0xc6/0x1e0
[ 3027.361777][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3027.361777][   T72] 
[ 3037.604702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3037.605133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3037.605133][   T72]      netdev_get_by_index+0x5e/0x80
[ 3037.605133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3037.605133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3037.605133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3037.605133][   T72]      ipv6_add_addr+0x411/0x2000
[ 3037.605133][   T72]      inet6_addr_add+0x30e/0xa40
[ 3037.605133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3037.605133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.605133][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.605133][   T72]      netlink_unicast+0x449/0x710
[ 3037.605133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.605133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.605133][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.605133][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.605133][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.605133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.605133][   T72] 
[ 3037.607141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3037.607141][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3037.607141][   T72]      ipv6_find_idev+0x102/0x170
[ 3037.607141][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3037.607141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.607141][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.607141][   T72]      netlink_unicast+0x449/0x710
[ 3037.607141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.607141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.607141][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.607141][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.607141][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.607141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.607141][   T72] 
[ 3037.608655][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3037.608655][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3037.608655][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3037.608655][   T72]      ipv6_find_idev+0x102/0x170
[ 3037.608655][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3037.608655][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.608655][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.608655][   T72]      netlink_unicast+0x449/0x710
[ 3037.608655][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.608655][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.608655][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.608655][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.608655][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.608655][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.608655][   T72] 
[ 3037.610315][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3037.610588][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3037.610588][   T72]      netdev_get_by_index+0x5e/0x80
[ 3037.610588][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3037.610588][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3037.610588][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3037.610588][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3037.610588][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3037.610588][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3037.610588][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3037.610588][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3037.610588][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3037.610588][   T72]      vfs_write+0x9e5/0x10a0
[ 3037.610588][   T72]      ksys_write+0xf5/0x1e0
[ 3037.610588][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.610588][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.610588][   T72] 
[ 3037.612406][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3037.612406][   T72]      netdev_get_by_index+0x5e/0x80
[ 3037.612406][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3037.612406][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3037.612406][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3037.612406][   T72]      ipv6_add_addr+0x411/0x2000
[ 3037.612406][   T72]      inet6_addr_add+0x30e/0xa40
[ 3037.612406][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3037.612406][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.612406][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.612406][   T72]      netlink_unicast+0x449/0x710
[ 3037.612406][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.612406][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.612406][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.612406][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.612406][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.612406][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.612406][   T72] 
[ 3037.614375][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3037.614375][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3037.614375][   T72]      ipv6_find_idev+0x102/0x170
[ 3037.614375][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3037.614375][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.614375][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.614375][   T72]      netlink_unicast+0x449/0x710
[ 3037.614375][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.614375][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.614375][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.614375][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.614375][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.614375][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.614375][   T72] 
[ 3037.615890][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3037.615890][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3037.615890][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3037.615890][   T72]      ipv6_find_idev+0x102/0x170
[ 3037.615890][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3037.615890][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3037.615890][   T72]      netlink_rcv_skb+0x130/0x360
[ 3037.615890][   T72]      netlink_unicast+0x449/0x710
[ 3037.615890][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3037.615890][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3037.615890][   T72]      ___sys_sendmsg+0xee/0x170
[ 3037.615890][   T72]      __sys_sendmsg+0xcd/0x170
[ 3037.615890][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.615890][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.615890][   T72] 
[ 3037.617569][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3037.617850][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3037.617850][   T72]      dst_init+0x84/0x4a0
[ 3037.617850][   T72]      dst_alloc+0x97/0x150
[ 3037.617850][   T72]      ip6_dst_alloc+0x23/0x90
[ 3037.617850][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3037.617850][   T72]      ip6_pol_route+0x56f/0x840
[ 3037.617850][   T72]      fib6_rule_lookup+0x227/0x600
[ 3037.617850][   T72]      ip6_route_output_flags+0x251/0x460
[ 3037.617850][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3037.617850][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3037.617850][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3037.617850][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3037.617850][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3037.617850][   T72]      __sys_connect+0x217/0x2a0
[ 3037.617850][   T72]      __x64_sys_connect+0x72/0xb0
[ 3037.617850][   T72]      do_syscall_64+0xc6/0x1e0
[ 3037.617850][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3037.617850][   T72] 
[ 3047.860697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3047.861132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3047.861132][   T72]      netdev_get_by_index+0x5e/0x80
[ 3047.861132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3047.861132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3047.861132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3047.861132][   T72]      ipv6_add_addr+0x411/0x2000
[ 3047.861132][   T72]      inet6_addr_add+0x30e/0xa40
[ 3047.861132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3047.861132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.861132][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.861132][   T72]      netlink_unicast+0x449/0x710
[ 3047.861132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.861132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.861132][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.861132][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.861132][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.861132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.861132][   T72] 
[ 3047.863107][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3047.863107][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3047.863107][   T72]      ipv6_find_idev+0x102/0x170
[ 3047.863107][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3047.863107][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.863107][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.863107][   T72]      netlink_unicast+0x449/0x710
[ 3047.863107][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.863107][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.863107][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.863107][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.863107][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.863107][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.863107][   T72] 
[ 3047.864623][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3047.864623][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3047.864623][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3047.864623][   T72]      ipv6_find_idev+0x102/0x170
[ 3047.864623][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3047.864623][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.864623][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.864623][   T72]      netlink_unicast+0x449/0x710
[ 3047.864623][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.864623][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.864623][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.864623][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.864623][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.864623][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.864623][   T72] 
[ 3047.866296][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3047.866566][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3047.866566][   T72]      netdev_get_by_index+0x5e/0x80
[ 3047.866566][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3047.866566][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3047.866566][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3047.866566][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3047.866566][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3047.866566][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3047.866566][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3047.866566][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3047.866566][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3047.866566][   T72]      vfs_write+0x9e5/0x10a0
[ 3047.866566][   T72]      ksys_write+0xf5/0x1e0
[ 3047.866566][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.866566][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.866566][   T72] 
[ 3047.868399][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3047.868399][   T72]      netdev_get_by_index+0x5e/0x80
[ 3047.868399][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3047.868399][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3047.868399][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3047.868399][   T72]      ipv6_add_addr+0x411/0x2000
[ 3047.868399][   T72]      inet6_addr_add+0x30e/0xa40
[ 3047.868399][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3047.868399][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.868399][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.868399][   T72]      netlink_unicast+0x449/0x710
[ 3047.868399][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.868399][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.868399][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.868399][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.868399][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.868399][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.868399][   T72] 
[ 3047.870373][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3047.870373][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3047.870373][   T72]      ipv6_find_idev+0x102/0x170
[ 3047.870373][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3047.870373][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.870373][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.870373][   T72]      netlink_unicast+0x449/0x710
[ 3047.870373][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.870373][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.870373][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.870373][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.870373][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.870373][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.870373][   T72] 
[ 3047.871886][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3047.871886][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3047.871886][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3047.871886][   T72]      ipv6_find_idev+0x102/0x170
[ 3047.871886][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3047.871886][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3047.871886][   T72]      netlink_rcv_skb+0x130/0x360
[ 3047.871886][   T72]      netlink_unicast+0x449/0x710
[ 3047.871886][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3047.871886][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3047.871886][   T72]      ___sys_sendmsg+0xee/0x170
[ 3047.871886][   T72]      __sys_sendmsg+0xcd/0x170
[ 3047.871886][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.871886][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.871886][   T72] 
[ 3047.873546][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3047.873792][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3047.873792][   T72]      dst_init+0x84/0x4a0
[ 3047.873792][   T72]      dst_alloc+0x97/0x150
[ 3047.873792][   T72]      ip6_dst_alloc+0x23/0x90
[ 3047.873792][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3047.873792][   T72]      ip6_pol_route+0x56f/0x840
[ 3047.873792][   T72]      fib6_rule_lookup+0x227/0x600
[ 3047.873792][   T72]      ip6_route_output_flags+0x251/0x460
[ 3047.873792][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3047.873792][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3047.873792][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3047.873792][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3047.873792][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3047.873792][   T72]      __sys_connect+0x217/0x2a0
[ 3047.873792][   T72]      __x64_sys_connect+0x72/0xb0
[ 3047.873792][   T72]      do_syscall_64+0xc6/0x1e0
[ 3047.873792][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3047.873792][   T72] 
[ 3058.116694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3058.117078][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3058.117078][   T72]      netdev_get_by_index+0x5e/0x80
[ 3058.117078][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3058.117078][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3058.117078][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3058.117078][   T72]      ipv6_add_addr+0x411/0x2000
[ 3058.117078][   T72]      inet6_addr_add+0x30e/0xa40
[ 3058.117078][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3058.117078][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.117078][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.117078][   T72]      netlink_unicast+0x449/0x710
[ 3058.117078][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.117078][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.117078][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.117078][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.117078][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.117078][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.117078][   T72] 
[ 3058.119060][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3058.119060][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3058.119060][   T72]      ipv6_find_idev+0x102/0x170
[ 3058.119060][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3058.119060][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.119060][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.119060][   T72]      netlink_unicast+0x449/0x710
[ 3058.119060][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.119060][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.119060][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.119060][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.119060][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.119060][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.119060][   T72] 
[ 3058.120999][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3058.120999][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3058.120999][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3058.120999][   T72]      ipv6_find_idev+0x102/0x170
[ 3058.120999][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3058.120999][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.120999][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.120999][   T72]      netlink_unicast+0x449/0x710
[ 3058.120999][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.120999][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.120999][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.120999][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.120999][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.120999][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.120999][   T72] 
[ 3058.123186][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3058.123526][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3058.123526][   T72]      netdev_get_by_index+0x5e/0x80
[ 3058.123526][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3058.123526][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3058.123526][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3058.123526][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3058.123526][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3058.123526][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3058.123526][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3058.123526][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3058.123526][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3058.123526][   T72]      vfs_write+0x9e5/0x10a0
[ 3058.123526][   T72]      ksys_write+0xf5/0x1e0
[ 3058.123526][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.123526][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.123526][   T72] 
[ 3058.125949][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3058.125949][   T72]      netdev_get_by_index+0x5e/0x80
[ 3058.125949][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3058.125949][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3058.125949][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3058.125949][   T72]      ipv6_add_addr+0x411/0x2000
[ 3058.125949][   T72]      inet6_addr_add+0x30e/0xa40
[ 3058.125949][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3058.125949][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.125949][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.125949][   T72]      netlink_unicast+0x449/0x710
[ 3058.125949][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.125949][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.125949][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.125949][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.125949][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.125949][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.125949][   T72] 
[ 3058.128564][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3058.128564][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3058.128564][   T72]      ipv6_find_idev+0x102/0x170
[ 3058.128564][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3058.128564][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.128564][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.128564][   T72]      netlink_unicast+0x449/0x710
[ 3058.128564][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.128564][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.128564][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.128564][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.128564][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.128564][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.128564][   T72] 
[ 3058.130551][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3058.130551][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3058.130551][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3058.130551][   T72]      ipv6_find_idev+0x102/0x170
[ 3058.130551][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3058.130551][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3058.130551][   T72]      netlink_rcv_skb+0x130/0x360
[ 3058.130551][   T72]      netlink_unicast+0x449/0x710
[ 3058.130551][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3058.130551][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3058.130551][   T72]      ___sys_sendmsg+0xee/0x170
[ 3058.130551][   T72]      __sys_sendmsg+0xcd/0x170
[ 3058.130551][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.130551][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.130551][   T72] 
[ 3058.132731][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3058.133008][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3058.133008][   T72]      dst_init+0x84/0x4a0
[ 3058.133008][   T72]      dst_alloc+0x97/0x150
[ 3058.133008][   T72]      ip6_dst_alloc+0x23/0x90
[ 3058.133008][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3058.133008][   T72]      ip6_pol_route+0x56f/0x840
[ 3058.133008][   T72]      fib6_rule_lookup+0x227/0x600
[ 3058.133008][   T72]      ip6_route_output_flags+0x251/0x460
[ 3058.133008][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3058.133008][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3058.133008][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3058.133008][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3058.133008][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3058.133008][   T72]      __sys_connect+0x217/0x2a0
[ 3058.133008][   T72]      __x64_sys_connect+0x72/0xb0
[ 3058.133008][   T72]      do_syscall_64+0xc6/0x1e0
[ 3058.133008][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3058.133008][   T72] 
[ 3068.356697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3068.357089][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3068.357089][   T72]      netdev_get_by_index+0x5e/0x80
[ 3068.357089][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3068.357089][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3068.357089][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3068.357089][   T72]      ipv6_add_addr+0x411/0x2000
[ 3068.357089][   T72]      inet6_addr_add+0x30e/0xa40
[ 3068.357089][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3068.357089][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.357089][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.357089][   T72]      netlink_unicast+0x449/0x710
[ 3068.357089][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.357089][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.357089][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.357089][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.357089][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.357089][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.357089][   T72] 
[ 3068.359076][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3068.359076][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3068.359076][   T72]      ipv6_find_idev+0x102/0x170
[ 3068.359076][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3068.359076][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.359076][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.359076][   T72]      netlink_unicast+0x449/0x710
[ 3068.359076][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.359076][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.359076][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.359076][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.359076][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.359076][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.359076][   T72] 
[ 3068.360594][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3068.360594][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3068.360594][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3068.360594][   T72]      ipv6_find_idev+0x102/0x170
[ 3068.360594][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3068.360594][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.360594][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.360594][   T72]      netlink_unicast+0x449/0x710
[ 3068.360594][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.360594][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.360594][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.360594][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.360594][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.360594][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.360594][   T72] 
[ 3068.362263][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3068.362537][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3068.362537][   T72]      netdev_get_by_index+0x5e/0x80
[ 3068.362537][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3068.362537][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3068.362537][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3068.362537][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3068.362537][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3068.362537][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3068.362537][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3068.362537][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3068.362537][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3068.362537][   T72]      vfs_write+0x9e5/0x10a0
[ 3068.362537][   T72]      ksys_write+0xf5/0x1e0
[ 3068.362537][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.362537][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.362537][   T72] 
[ 3068.364358][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3068.364358][   T72]      netdev_get_by_index+0x5e/0x80
[ 3068.364358][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3068.364358][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3068.364358][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3068.364358][   T72]      ipv6_add_addr+0x411/0x2000
[ 3068.364358][   T72]      inet6_addr_add+0x30e/0xa40
[ 3068.364358][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3068.364358][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.364358][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.364358][   T72]      netlink_unicast+0x449/0x710
[ 3068.364358][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.364358][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.364358][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.364358][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.364358][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.364358][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.364358][   T72] 
[ 3068.366326][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3068.366326][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3068.366326][   T72]      ipv6_find_idev+0x102/0x170
[ 3068.366326][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3068.366326][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.366326][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.366326][   T72]      netlink_unicast+0x449/0x710
[ 3068.366326][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.366326][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.366326][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.366326][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.366326][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.366326][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.366326][   T72] 
[ 3068.367836][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3068.367836][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3068.367836][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3068.367836][   T72]      ipv6_find_idev+0x102/0x170
[ 3068.367836][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3068.367836][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3068.367836][   T72]      netlink_rcv_skb+0x130/0x360
[ 3068.367836][   T72]      netlink_unicast+0x449/0x710
[ 3068.367836][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3068.367836][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3068.367836][   T72]      ___sys_sendmsg+0xee/0x170
[ 3068.367836][   T72]      __sys_sendmsg+0xcd/0x170
[ 3068.367836][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.367836][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.367836][   T72] 
[ 3068.370005][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3068.370242][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3068.370242][   T72]      dst_init+0x84/0x4a0
[ 3068.370242][   T72]      dst_alloc+0x97/0x150
[ 3068.370242][   T72]      ip6_dst_alloc+0x23/0x90
[ 3068.370242][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3068.370242][   T72]      ip6_pol_route+0x56f/0x840
[ 3068.370242][   T72]      fib6_rule_lookup+0x227/0x600
[ 3068.370242][   T72]      ip6_route_output_flags+0x251/0x460
[ 3068.370242][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3068.370242][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3068.370242][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3068.370242][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3068.370242][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3068.370242][   T72]      __sys_connect+0x217/0x2a0
[ 3068.370242][   T72]      __x64_sys_connect+0x72/0xb0
[ 3068.370242][   T72]      do_syscall_64+0xc6/0x1e0
[ 3068.370242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3068.370242][   T72] 
[ 3078.620697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3078.621114][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3078.621114][   T72]      netdev_get_by_index+0x5e/0x80
[ 3078.621114][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3078.621114][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3078.621114][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3078.621114][   T72]      ipv6_add_addr+0x411/0x2000
[ 3078.621114][   T72]      inet6_addr_add+0x30e/0xa40
[ 3078.621114][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3078.621114][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.621114][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.621114][   T72]      netlink_unicast+0x449/0x710
[ 3078.621114][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.621114][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.621114][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.621114][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.621114][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.621114][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.621114][   T72] 
[ 3078.623089][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3078.623089][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3078.623089][   T72]      ipv6_find_idev+0x102/0x170
[ 3078.623089][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3078.623089][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.623089][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.623089][   T72]      netlink_unicast+0x449/0x710
[ 3078.623089][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.623089][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.623089][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.623089][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.623089][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.623089][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.623089][   T72] 
[ 3078.624604][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3078.624604][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3078.624604][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3078.624604][   T72]      ipv6_find_idev+0x102/0x170
[ 3078.624604][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3078.624604][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.624604][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.624604][   T72]      netlink_unicast+0x449/0x710
[ 3078.624604][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.624604][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.624604][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.624604][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.624604][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.624604][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.624604][   T72] 
[ 3078.626266][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3078.626529][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3078.626529][   T72]      netdev_get_by_index+0x5e/0x80
[ 3078.626529][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3078.626529][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3078.626529][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3078.626529][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3078.626529][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3078.626529][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3078.626529][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3078.626529][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3078.626529][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3078.626529][   T72]      vfs_write+0x9e5/0x10a0
[ 3078.626529][   T72]      ksys_write+0xf5/0x1e0
[ 3078.626529][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.626529][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.626529][   T72] 
[ 3078.628339][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3078.628339][   T72]      netdev_get_by_index+0x5e/0x80
[ 3078.628339][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3078.628339][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3078.628339][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3078.628339][   T72]      ipv6_add_addr+0x411/0x2000
[ 3078.628339][   T72]      inet6_addr_add+0x30e/0xa40
[ 3078.628339][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3078.628339][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.628339][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.628339][   T72]      netlink_unicast+0x449/0x710
[ 3078.628339][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.628339][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.628339][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.628339][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.628339][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.628339][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.628339][   T72] 
[ 3078.630568][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3078.630568][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3078.630568][   T72]      ipv6_find_idev+0x102/0x170
[ 3078.630568][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3078.630568][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.630568][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.630568][   T72]      netlink_unicast+0x449/0x710
[ 3078.630568][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.630568][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.630568][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.630568][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.630568][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.630568][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.630568][   T72] 
[ 3078.632518][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3078.632518][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3078.632518][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3078.632518][   T72]      ipv6_find_idev+0x102/0x170
[ 3078.632518][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3078.632518][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3078.632518][   T72]      netlink_rcv_skb+0x130/0x360
[ 3078.632518][   T72]      netlink_unicast+0x449/0x710
[ 3078.632518][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3078.632518][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3078.632518][   T72]      ___sys_sendmsg+0xee/0x170
[ 3078.632518][   T72]      __sys_sendmsg+0xcd/0x170
[ 3078.632518][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.632518][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.632518][   T72] 
[ 3078.634641][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3078.634938][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3078.634938][   T72]      dst_init+0x84/0x4a0
[ 3078.634938][   T72]      dst_alloc+0x97/0x150
[ 3078.634938][   T72]      ip6_dst_alloc+0x23/0x90
[ 3078.634938][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3078.634938][   T72]      ip6_pol_route+0x56f/0x840
[ 3078.634938][   T72]      fib6_rule_lookup+0x227/0x600
[ 3078.634938][   T72]      ip6_route_output_flags+0x251/0x460
[ 3078.634938][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3078.634938][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3078.634938][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3078.634938][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3078.634938][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3078.634938][   T72]      __sys_connect+0x217/0x2a0
[ 3078.634938][   T72]      __x64_sys_connect+0x72/0xb0
[ 3078.634938][   T72]      do_syscall_64+0xc6/0x1e0
[ 3078.634938][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3078.634938][   T72] 
[ 3088.868710][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3088.869146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3088.869146][   T72]      netdev_get_by_index+0x5e/0x80
[ 3088.869146][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3088.869146][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3088.869146][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3088.869146][   T72]      ipv6_add_addr+0x411/0x2000
[ 3088.869146][   T72]      inet6_addr_add+0x30e/0xa40
[ 3088.869146][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3088.869146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.869146][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.869146][   T72]      netlink_unicast+0x449/0x710
[ 3088.869146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.869146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.869146][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.869146][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.869146][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.869146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.869146][   T72] 
[ 3088.871122][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3088.871122][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3088.871122][   T72]      ipv6_find_idev+0x102/0x170
[ 3088.871122][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3088.871122][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.871122][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.871122][   T72]      netlink_unicast+0x449/0x710
[ 3088.871122][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.871122][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.871122][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.871122][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.871122][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.871122][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.871122][   T72] 
[ 3088.872638][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3088.872638][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3088.872638][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3088.872638][   T72]      ipv6_find_idev+0x102/0x170
[ 3088.872638][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3088.872638][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.872638][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.872638][   T72]      netlink_unicast+0x449/0x710
[ 3088.872638][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.872638][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.872638][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.872638][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.872638][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.872638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.872638][   T72] 
[ 3088.874293][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3088.874560][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3088.874560][   T72]      netdev_get_by_index+0x5e/0x80
[ 3088.874560][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3088.874560][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3088.874560][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3088.874560][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3088.874560][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3088.874560][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3088.874560][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3088.874560][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3088.874560][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3088.874560][   T72]      vfs_write+0x9e5/0x10a0
[ 3088.874560][   T72]      ksys_write+0xf5/0x1e0
[ 3088.874560][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.874560][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.874560][   T72] 
[ 3088.876380][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3088.876380][   T72]      netdev_get_by_index+0x5e/0x80
[ 3088.876380][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3088.876380][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3088.876380][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3088.876380][   T72]      ipv6_add_addr+0x411/0x2000
[ 3088.876380][   T72]      inet6_addr_add+0x30e/0xa40
[ 3088.876380][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3088.876380][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.876380][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.876380][   T72]      netlink_unicast+0x449/0x710
[ 3088.876380][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.876380][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.876380][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.876380][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.876380][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.876380][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.876380][   T72] 
[ 3088.878338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3088.878338][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3088.878338][   T72]      ipv6_find_idev+0x102/0x170
[ 3088.878338][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3088.878338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.878338][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.878338][   T72]      netlink_unicast+0x449/0x710
[ 3088.878338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.878338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.878338][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.878338][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.878338][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.878338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.878338][   T72] 
[ 3088.879848][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3088.879848][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3088.879848][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3088.879848][   T72]      ipv6_find_idev+0x102/0x170
[ 3088.879848][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3088.879848][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3088.879848][   T72]      netlink_rcv_skb+0x130/0x360
[ 3088.879848][   T72]      netlink_unicast+0x449/0x710
[ 3088.879848][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3088.879848][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3088.879848][   T72]      ___sys_sendmsg+0xee/0x170
[ 3088.879848][   T72]      __sys_sendmsg+0xcd/0x170
[ 3088.879848][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.879848][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.879848][   T72] 
[ 3088.881502][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3088.881749][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3088.881749][   T72]      dst_init+0x84/0x4a0
[ 3088.881749][   T72]      dst_alloc+0x97/0x150
[ 3088.881749][   T72]      ip6_dst_alloc+0x23/0x90
[ 3088.881749][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3088.881749][   T72]      ip6_pol_route+0x56f/0x840
[ 3088.881749][   T72]      fib6_rule_lookup+0x227/0x600
[ 3088.881749][   T72]      ip6_route_output_flags+0x251/0x460
[ 3088.881749][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3088.881749][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3088.881749][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3088.881749][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3088.881749][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3088.881749][   T72]      __sys_connect+0x217/0x2a0
[ 3088.881749][   T72]      __x64_sys_connect+0x72/0xb0
[ 3088.881749][   T72]      do_syscall_64+0xc6/0x1e0
[ 3088.881749][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3088.881749][   T72] 
[ 3099.124705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3099.125133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3099.125133][   T72]      netdev_get_by_index+0x5e/0x80
[ 3099.125133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3099.125133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3099.125133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3099.125133][   T72]      ipv6_add_addr+0x411/0x2000
[ 3099.125133][   T72]      inet6_addr_add+0x30e/0xa40
[ 3099.125133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3099.125133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.125133][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.125133][   T72]      netlink_unicast+0x449/0x710
[ 3099.125133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.125133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.125133][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.125133][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.125133][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.125133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.125133][   T72] 
[ 3099.127135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3099.127135][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3099.127135][   T72]      ipv6_find_idev+0x102/0x170
[ 3099.127135][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3099.127135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.127135][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.127135][   T72]      netlink_unicast+0x449/0x710
[ 3099.127135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.127135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.127135][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.127135][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.127135][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.127135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.127135][   T72] 
[ 3099.128650][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3099.128650][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3099.128650][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3099.128650][   T72]      ipv6_find_idev+0x102/0x170
[ 3099.128650][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3099.128650][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.128650][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.128650][   T72]      netlink_unicast+0x449/0x710
[ 3099.128650][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.128650][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.128650][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.128650][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.128650][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.128650][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.128650][   T72] 
[ 3099.130313][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3099.130676][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3099.130676][   T72]      netdev_get_by_index+0x5e/0x80
[ 3099.130676][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3099.130676][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3099.130676][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3099.130676][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3099.130676][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3099.130676][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3099.130676][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3099.130676][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3099.130676][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3099.130676][   T72]      vfs_write+0x9e5/0x10a0
[ 3099.130676][   T72]      ksys_write+0xf5/0x1e0
[ 3099.130676][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.130676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.130676][   T72] 
[ 3099.132492][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3099.132492][   T72]      netdev_get_by_index+0x5e/0x80
[ 3099.132492][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3099.132492][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3099.132492][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3099.132492][   T72]      ipv6_add_addr+0x411/0x2000
[ 3099.132492][   T72]      inet6_addr_add+0x30e/0xa40
[ 3099.132492][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3099.132492][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.132492][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.132492][   T72]      netlink_unicast+0x449/0x710
[ 3099.132492][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.132492][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.132492][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.132492][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.132492][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.132492][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.132492][   T72] 
[ 3099.134452][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3099.134452][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3099.134452][   T72]      ipv6_find_idev+0x102/0x170
[ 3099.134452][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3099.134452][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.134452][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.134452][   T72]      netlink_unicast+0x449/0x710
[ 3099.134452][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.134452][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.134452][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.134452][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.134452][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.134452][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.134452][   T72] 
[ 3099.135976][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3099.135976][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3099.135976][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3099.135976][   T72]      ipv6_find_idev+0x102/0x170
[ 3099.135976][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3099.135976][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3099.135976][   T72]      netlink_rcv_skb+0x130/0x360
[ 3099.135976][   T72]      netlink_unicast+0x449/0x710
[ 3099.135976][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3099.135976][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3099.135976][   T72]      ___sys_sendmsg+0xee/0x170
[ 3099.135976][   T72]      __sys_sendmsg+0xcd/0x170
[ 3099.135976][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.135976][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.135976][   T72] 
[ 3099.137632][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3099.137874][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3099.137874][   T72]      dst_init+0x84/0x4a0
[ 3099.137874][   T72]      dst_alloc+0x97/0x150
[ 3099.137874][   T72]      ip6_dst_alloc+0x23/0x90
[ 3099.137874][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3099.137874][   T72]      ip6_pol_route+0x56f/0x840
[ 3099.137874][   T72]      fib6_rule_lookup+0x227/0x600
[ 3099.137874][   T72]      ip6_route_output_flags+0x251/0x460
[ 3099.137874][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3099.137874][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3099.137874][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3099.137874][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3099.137874][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3099.137874][   T72]      __sys_connect+0x217/0x2a0
[ 3099.137874][   T72]      __x64_sys_connect+0x72/0xb0
[ 3099.137874][   T72]      do_syscall_64+0xc6/0x1e0
[ 3099.137874][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3099.137874][   T72] 
[ 3109.380723][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3109.381095][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3109.381095][   T72]      netdev_get_by_index+0x5e/0x80
[ 3109.381095][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3109.381095][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3109.381095][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3109.381095][   T72]      ipv6_add_addr+0x411/0x2000
[ 3109.381095][   T72]      inet6_addr_add+0x30e/0xa40
[ 3109.381095][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3109.381095][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.381095][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.381095][   T72]      netlink_unicast+0x449/0x710
[ 3109.381095][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.381095][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.381095][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.381095][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.381095][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.381095][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.381095][   T72] 
[ 3109.383068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3109.383068][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3109.383068][   T72]      ipv6_find_idev+0x102/0x170
[ 3109.383068][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3109.383068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.383068][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.383068][   T72]      netlink_unicast+0x449/0x710
[ 3109.383068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.383068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.383068][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.383068][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.383068][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.383068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.383068][   T72] 
[ 3109.384589][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3109.384589][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3109.384589][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3109.384589][   T72]      ipv6_find_idev+0x102/0x170
[ 3109.384589][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3109.384589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.384589][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.384589][   T72]      netlink_unicast+0x449/0x710
[ 3109.384589][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.384589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.384589][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.384589][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.384589][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.384589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.384589][   T72] 
[ 3109.386270][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3109.386544][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3109.386544][   T72]      netdev_get_by_index+0x5e/0x80
[ 3109.386544][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3109.386544][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3109.386544][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3109.386544][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3109.386544][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3109.386544][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3109.386544][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3109.386544][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3109.386544][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3109.386544][   T72]      vfs_write+0x9e5/0x10a0
[ 3109.386544][   T72]      ksys_write+0xf5/0x1e0
[ 3109.386544][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.386544][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.386544][   T72] 
[ 3109.388360][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3109.388360][   T72]      netdev_get_by_index+0x5e/0x80
[ 3109.388360][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3109.388360][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3109.388360][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3109.388360][   T72]      ipv6_add_addr+0x411/0x2000
[ 3109.388360][   T72]      inet6_addr_add+0x30e/0xa40
[ 3109.388360][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3109.388360][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.388360][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.388360][   T72]      netlink_unicast+0x449/0x710
[ 3109.388360][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.388360][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.388360][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.388360][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.388360][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.388360][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.388360][   T72] 
[ 3109.390326][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3109.390326][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3109.390326][   T72]      ipv6_find_idev+0x102/0x170
[ 3109.390326][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3109.390326][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.390326][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.390326][   T72]      netlink_unicast+0x449/0x710
[ 3109.390326][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.390326][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.390326][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.390326][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.390326][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.390326][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.390326][   T72] 
[ 3109.391839][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3109.391839][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3109.391839][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3109.391839][   T72]      ipv6_find_idev+0x102/0x170
[ 3109.391839][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3109.391839][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3109.391839][   T72]      netlink_rcv_skb+0x130/0x360
[ 3109.391839][   T72]      netlink_unicast+0x449/0x710
[ 3109.391839][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3109.391839][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3109.391839][   T72]      ___sys_sendmsg+0xee/0x170
[ 3109.391839][   T72]      __sys_sendmsg+0xcd/0x170
[ 3109.391839][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.391839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.391839][   T72] 
[ 3109.393621][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3109.393855][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3109.393855][   T72]      dst_init+0x84/0x4a0
[ 3109.393855][   T72]      dst_alloc+0x97/0x150
[ 3109.393855][   T72]      ip6_dst_alloc+0x23/0x90
[ 3109.393855][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3109.393855][   T72]      ip6_pol_route+0x56f/0x840
[ 3109.393855][   T72]      fib6_rule_lookup+0x227/0x600
[ 3109.393855][   T72]      ip6_route_output_flags+0x251/0x460
[ 3109.393855][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3109.393855][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3109.393855][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3109.393855][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3109.393855][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3109.393855][   T72]      __sys_connect+0x217/0x2a0
[ 3109.393855][   T72]      __x64_sys_connect+0x72/0xb0
[ 3109.393855][   T72]      do_syscall_64+0xc6/0x1e0
[ 3109.393855][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3109.393855][   T72] 
[ 3119.636622][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3119.637053][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3119.637053][   T72]      netdev_get_by_index+0x5e/0x80
[ 3119.637053][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3119.637053][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3119.637053][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3119.637053][   T72]      ipv6_add_addr+0x411/0x2000
[ 3119.637053][   T72]      inet6_addr_add+0x30e/0xa40
[ 3119.637053][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3119.637053][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.637053][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.637053][   T72]      netlink_unicast+0x449/0x710
[ 3119.637053][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.637053][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.637053][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.637053][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.637053][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.637053][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.637053][   T72] 
[ 3119.639042][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3119.639042][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3119.639042][   T72]      ipv6_find_idev+0x102/0x170
[ 3119.639042][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3119.639042][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.639042][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.639042][   T72]      netlink_unicast+0x449/0x710
[ 3119.639042][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.639042][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.639042][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.639042][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.639042][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.639042][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.639042][   T72] 
[ 3119.640564][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3119.640564][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3119.640564][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3119.640564][   T72]      ipv6_find_idev+0x102/0x170
[ 3119.640564][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3119.640564][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.640564][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.640564][   T72]      netlink_unicast+0x449/0x710
[ 3119.640564][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.640564][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.640564][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.640564][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.640564][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.640564][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.640564][   T72] 
[ 3119.642253][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3119.642525][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3119.642525][   T72]      netdev_get_by_index+0x5e/0x80
[ 3119.642525][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3119.642525][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3119.642525][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3119.642525][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3119.642525][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3119.642525][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3119.642525][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3119.642525][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3119.642525][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3119.642525][   T72]      vfs_write+0x9e5/0x10a0
[ 3119.642525][   T72]      ksys_write+0xf5/0x1e0
[ 3119.642525][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.642525][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.642525][   T72] 
[ 3119.644352][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3119.644352][   T72]      netdev_get_by_index+0x5e/0x80
[ 3119.644352][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3119.644352][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3119.644352][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3119.644352][   T72]      ipv6_add_addr+0x411/0x2000
[ 3119.644352][   T72]      inet6_addr_add+0x30e/0xa40
[ 3119.644352][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3119.644352][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.644352][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.644352][   T72]      netlink_unicast+0x449/0x710
[ 3119.644352][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.644352][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.644352][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.644352][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.644352][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.644352][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.644352][   T72] 
[ 3119.646338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3119.646338][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3119.646338][   T72]      ipv6_find_idev+0x102/0x170
[ 3119.646338][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3119.646338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.646338][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.646338][   T72]      netlink_unicast+0x449/0x710
[ 3119.646338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.646338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.646338][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.646338][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.646338][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.646338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.646338][   T72] 
[ 3119.647855][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3119.647855][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3119.647855][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3119.647855][   T72]      ipv6_find_idev+0x102/0x170
[ 3119.647855][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3119.647855][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3119.647855][   T72]      netlink_rcv_skb+0x130/0x360
[ 3119.647855][   T72]      netlink_unicast+0x449/0x710
[ 3119.647855][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3119.647855][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3119.647855][   T72]      ___sys_sendmsg+0xee/0x170
[ 3119.647855][   T72]      __sys_sendmsg+0xcd/0x170
[ 3119.647855][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.647855][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.647855][   T72] 
[ 3119.649525][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3119.649775][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3119.649775][   T72]      dst_init+0x84/0x4a0
[ 3119.649775][   T72]      dst_alloc+0x97/0x150
[ 3119.649775][   T72]      ip6_dst_alloc+0x23/0x90
[ 3119.649775][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3119.649775][   T72]      ip6_pol_route+0x56f/0x840
[ 3119.649775][   T72]      fib6_rule_lookup+0x227/0x600
[ 3119.649775][   T72]      ip6_route_output_flags+0x251/0x460
[ 3119.649775][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3119.649775][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3119.649775][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3119.649775][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3119.649775][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3119.649775][   T72]      __sys_connect+0x217/0x2a0
[ 3119.649775][   T72]      __x64_sys_connect+0x72/0xb0
[ 3119.649775][   T72]      do_syscall_64+0xc6/0x1e0
[ 3119.649775][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3119.649775][   T72] 
[ 3129.700621][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3129.700999][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3129.700999][   T72]      netdev_get_by_index+0x5e/0x80
[ 3129.700999][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3129.700999][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3129.700999][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3129.700999][   T72]      ipv6_add_addr+0x411/0x2000
[ 3129.700999][   T72]      inet6_addr_add+0x30e/0xa40
[ 3129.700999][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3129.700999][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.700999][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.700999][   T72]      netlink_unicast+0x449/0x710
[ 3129.700999][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.700999][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.700999][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.700999][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.700999][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.700999][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.700999][   T72] 
[ 3129.702987][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3129.702987][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3129.702987][   T72]      ipv6_find_idev+0x102/0x170
[ 3129.702987][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3129.702987][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.702987][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.702987][   T72]      netlink_unicast+0x449/0x710
[ 3129.702987][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.702987][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.702987][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.702987][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.702987][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.702987][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.702987][   T72] 
[ 3129.704507][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3129.704507][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3129.704507][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3129.704507][   T72]      ipv6_find_idev+0x102/0x170
[ 3129.704507][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3129.704507][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.704507][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.704507][   T72]      netlink_unicast+0x449/0x710
[ 3129.704507][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.704507][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.704507][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.704507][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.704507][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.704507][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.704507][   T72] 
[ 3129.706184][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3129.706445][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3129.706445][   T72]      netdev_get_by_index+0x5e/0x80
[ 3129.706445][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3129.706445][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3129.706445][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3129.706445][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3129.706445][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3129.706445][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3129.706445][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3129.706445][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3129.706445][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3129.706445][   T72]      vfs_write+0x9e5/0x10a0
[ 3129.706445][   T72]      ksys_write+0xf5/0x1e0
[ 3129.706445][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.706445][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.706445][   T72] 
[ 3129.708277][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3129.708277][   T72]      netdev_get_by_index+0x5e/0x80
[ 3129.708277][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3129.708277][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3129.708277][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3129.708277][   T72]      ipv6_add_addr+0x411/0x2000
[ 3129.708277][   T72]      inet6_addr_add+0x30e/0xa40
[ 3129.708277][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3129.708277][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.708277][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.708277][   T72]      netlink_unicast+0x449/0x710
[ 3129.708277][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.708277][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.708277][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.708277][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.708277][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.708277][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.708277][   T72] 
[ 3129.710240][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3129.710240][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3129.710240][   T72]      ipv6_find_idev+0x102/0x170
[ 3129.710240][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3129.710240][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.710240][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.710240][   T72]      netlink_unicast+0x449/0x710
[ 3129.710240][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.710240][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.710240][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.710240][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.710240][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.710240][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.710240][   T72] 
[ 3129.711764][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3129.711764][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3129.711764][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3129.711764][   T72]      ipv6_find_idev+0x102/0x170
[ 3129.711764][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3129.711764][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3129.711764][   T72]      netlink_rcv_skb+0x130/0x360
[ 3129.711764][   T72]      netlink_unicast+0x449/0x710
[ 3129.711764][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3129.711764][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3129.711764][   T72]      ___sys_sendmsg+0xee/0x170
[ 3129.711764][   T72]      __sys_sendmsg+0xcd/0x170
[ 3129.711764][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.711764][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.711764][   T72] 
[ 3129.713422][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3129.713678][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3129.713678][   T72]      dst_init+0x84/0x4a0
[ 3129.713678][   T72]      dst_alloc+0x97/0x150
[ 3129.713678][   T72]      ip6_dst_alloc+0x23/0x90
[ 3129.713678][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3129.713678][   T72]      ip6_pol_route+0x56f/0x840
[ 3129.713678][   T72]      fib6_rule_lookup+0x227/0x600
[ 3129.713678][   T72]      ip6_route_output_flags+0x251/0x460
[ 3129.713678][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3129.713678][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3129.713678][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3129.713678][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3129.713678][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3129.713678][   T72]      __sys_connect+0x217/0x2a0
[ 3129.713678][   T72]      __x64_sys_connect+0x72/0xb0
[ 3129.713678][   T72]      do_syscall_64+0xc6/0x1e0
[ 3129.713678][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3129.713678][   T72] 
[ 3139.956630][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3139.957140][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3139.957140][   T72]      netdev_get_by_index+0x5e/0x80
[ 3139.957140][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3139.957140][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3139.957140][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3139.957140][   T72]      ipv6_add_addr+0x411/0x2000
[ 3139.957140][   T72]      inet6_addr_add+0x30e/0xa40
[ 3139.957140][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3139.957140][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.957140][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.957140][   T72]      netlink_unicast+0x449/0x710
[ 3139.957140][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.957140][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.957140][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.957140][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.957140][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.957140][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.957140][   T72] 
[ 3139.959124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3139.959124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3139.959124][   T72]      ipv6_find_idev+0x102/0x170
[ 3139.959124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3139.959124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.959124][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.959124][   T72]      netlink_unicast+0x449/0x710
[ 3139.959124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.959124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.959124][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.959124][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.959124][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.959124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.959124][   T72] 
[ 3139.960645][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3139.960645][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3139.960645][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3139.960645][   T72]      ipv6_find_idev+0x102/0x170
[ 3139.960645][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3139.960645][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.960645][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.960645][   T72]      netlink_unicast+0x449/0x710
[ 3139.960645][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.960645][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.960645][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.960645][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.960645][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.960645][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.960645][   T72] 
[ 3139.962314][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3139.962580][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3139.962580][   T72]      netdev_get_by_index+0x5e/0x80
[ 3139.962580][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3139.962580][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3139.962580][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3139.962580][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3139.962580][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3139.962580][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3139.962580][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3139.962580][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3139.962580][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3139.962580][   T72]      vfs_write+0x9e5/0x10a0
[ 3139.962580][   T72]      ksys_write+0xf5/0x1e0
[ 3139.962580][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.962580][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.962580][   T72] 
[ 3139.964413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3139.964413][   T72]      netdev_get_by_index+0x5e/0x80
[ 3139.964413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3139.964413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3139.964413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3139.964413][   T72]      ipv6_add_addr+0x411/0x2000
[ 3139.964413][   T72]      inet6_addr_add+0x30e/0xa40
[ 3139.964413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3139.964413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.964413][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.964413][   T72]      netlink_unicast+0x449/0x710
[ 3139.964413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.964413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.964413][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.964413][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.964413][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.964413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.964413][   T72] 
[ 3139.966392][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3139.966392][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3139.966392][   T72]      ipv6_find_idev+0x102/0x170
[ 3139.966392][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3139.966392][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.966392][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.966392][   T72]      netlink_unicast+0x449/0x710
[ 3139.966392][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.966392][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.966392][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.966392][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.966392][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.966392][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.966392][   T72] 
[ 3139.967905][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3139.967905][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3139.967905][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3139.967905][   T72]      ipv6_find_idev+0x102/0x170
[ 3139.967905][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3139.967905][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3139.967905][   T72]      netlink_rcv_skb+0x130/0x360
[ 3139.967905][   T72]      netlink_unicast+0x449/0x710
[ 3139.967905][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3139.967905][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3139.967905][   T72]      ___sys_sendmsg+0xee/0x170
[ 3139.967905][   T72]      __sys_sendmsg+0xcd/0x170
[ 3139.967905][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.967905][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.967905][   T72] 
[ 3139.969570][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3139.969829][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3139.969829][   T72]      dst_init+0x84/0x4a0
[ 3139.969829][   T72]      dst_alloc+0x97/0x150
[ 3139.969829][   T72]      ip6_dst_alloc+0x23/0x90
[ 3139.969829][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3139.969829][   T72]      ip6_pol_route+0x56f/0x840
[ 3139.969829][   T72]      fib6_rule_lookup+0x227/0x600
[ 3139.969829][   T72]      ip6_route_output_flags+0x251/0x460
[ 3139.969829][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3139.969829][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3139.969829][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3139.969829][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3139.969829][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3139.969829][   T72]      __sys_connect+0x217/0x2a0
[ 3139.969829][   T72]      __x64_sys_connect+0x72/0xb0
[ 3139.969829][   T72]      do_syscall_64+0xc6/0x1e0
[ 3139.969829][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3139.969829][   T72] 
[ 3150.212703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3150.213129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3150.213129][   T72]      netdev_get_by_index+0x5e/0x80
[ 3150.213129][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3150.213129][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3150.213129][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3150.213129][   T72]      ipv6_add_addr+0x411/0x2000
[ 3150.213129][   T72]      inet6_addr_add+0x30e/0xa40
[ 3150.213129][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3150.213129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.213129][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.213129][   T72]      netlink_unicast+0x449/0x710
[ 3150.213129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.213129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.213129][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.213129][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.213129][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.213129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.213129][   T72] 
[ 3150.215110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3150.215110][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3150.215110][   T72]      ipv6_find_idev+0x102/0x170
[ 3150.215110][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3150.215110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.215110][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.215110][   T72]      netlink_unicast+0x449/0x710
[ 3150.215110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.215110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.215110][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.215110][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.215110][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.215110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.215110][   T72] 
[ 3150.216644][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3150.216644][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3150.216644][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3150.216644][   T72]      ipv6_find_idev+0x102/0x170
[ 3150.216644][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3150.216644][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.216644][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.216644][   T72]      netlink_unicast+0x449/0x710
[ 3150.216644][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.216644][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.216644][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.216644][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.216644][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.216644][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.216644][   T72] 
[ 3150.218298][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3150.218558][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3150.218558][   T72]      netdev_get_by_index+0x5e/0x80
[ 3150.218558][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3150.218558][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3150.218558][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3150.218558][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3150.218558][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3150.218558][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3150.218558][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3150.218558][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3150.218558][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3150.218558][   T72]      vfs_write+0x9e5/0x10a0
[ 3150.218558][   T72]      ksys_write+0xf5/0x1e0
[ 3150.218558][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.218558][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.218558][   T72] 
[ 3150.220386][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3150.220386][   T72]      netdev_get_by_index+0x5e/0x80
[ 3150.220386][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3150.220386][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3150.220386][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3150.220386][   T72]      ipv6_add_addr+0x411/0x2000
[ 3150.220386][   T72]      inet6_addr_add+0x30e/0xa40
[ 3150.220386][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3150.220386][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.220386][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.220386][   T72]      netlink_unicast+0x449/0x710
[ 3150.220386][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.220386][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.220386][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.220386][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.220386][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.220386][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.220386][   T72] 
[ 3150.222343][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3150.222343][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3150.222343][   T72]      ipv6_find_idev+0x102/0x170
[ 3150.222343][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3150.222343][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.222343][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.222343][   T72]      netlink_unicast+0x449/0x710
[ 3150.222343][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.222343][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.222343][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.222343][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.222343][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.222343][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.222343][   T72] 
[ 3150.223856][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3150.223856][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3150.223856][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3150.223856][   T72]      ipv6_find_idev+0x102/0x170
[ 3150.223856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3150.223856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3150.223856][   T72]      netlink_rcv_skb+0x130/0x360
[ 3150.223856][   T72]      netlink_unicast+0x449/0x710
[ 3150.223856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3150.223856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3150.223856][   T72]      ___sys_sendmsg+0xee/0x170
[ 3150.223856][   T72]      __sys_sendmsg+0xcd/0x170
[ 3150.223856][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.223856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.223856][   T72] 
[ 3150.225528][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3150.225774][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3150.225774][   T72]      dst_init+0x84/0x4a0
[ 3150.225774][   T72]      dst_alloc+0x97/0x150
[ 3150.225774][   T72]      ip6_dst_alloc+0x23/0x90
[ 3150.225774][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3150.225774][   T72]      ip6_pol_route+0x56f/0x840
[ 3150.225774][   T72]      fib6_rule_lookup+0x227/0x600
[ 3150.225774][   T72]      ip6_route_output_flags+0x251/0x460
[ 3150.225774][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3150.225774][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3150.225774][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3150.225774][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3150.225774][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3150.225774][   T72]      __sys_connect+0x217/0x2a0
[ 3150.225774][   T72]      __x64_sys_connect+0x72/0xb0
[ 3150.225774][   T72]      do_syscall_64+0xc6/0x1e0
[ 3150.225774][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3150.225774][   T72] 
[ 3160.468630][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3160.469070][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3160.469070][   T72]      netdev_get_by_index+0x5e/0x80
[ 3160.469070][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3160.469070][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3160.469070][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3160.469070][   T72]      ipv6_add_addr+0x411/0x2000
[ 3160.469070][   T72]      inet6_addr_add+0x30e/0xa40
[ 3160.469070][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3160.469070][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.469070][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.469070][   T72]      netlink_unicast+0x449/0x710
[ 3160.469070][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.469070][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.469070][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.469070][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.469070][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.469070][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.469070][   T72] 
[ 3160.471054][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3160.471054][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3160.471054][   T72]      ipv6_find_idev+0x102/0x170
[ 3160.471054][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3160.471054][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.471054][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.471054][   T72]      netlink_unicast+0x449/0x710
[ 3160.471054][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.471054][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.471054][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.471054][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.471054][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.471054][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.471054][   T72] 
[ 3160.472571][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3160.472571][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3160.472571][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3160.472571][   T72]      ipv6_find_idev+0x102/0x170
[ 3160.472571][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3160.472571][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.472571][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.472571][   T72]      netlink_unicast+0x449/0x710
[ 3160.472571][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.472571][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.472571][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.472571][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.472571][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.472571][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.472571][   T72] 
[ 3160.474245][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3160.474510][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3160.474510][   T72]      netdev_get_by_index+0x5e/0x80
[ 3160.474510][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3160.474510][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3160.474510][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3160.474510][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3160.474510][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3160.474510][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3160.474510][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3160.474510][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3160.474510][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3160.474510][   T72]      vfs_write+0x9e5/0x10a0
[ 3160.474510][   T72]      ksys_write+0xf5/0x1e0
[ 3160.474510][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.474510][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.474510][   T72] 
[ 3160.476355][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3160.476355][   T72]      netdev_get_by_index+0x5e/0x80
[ 3160.476355][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3160.476355][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3160.476355][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3160.476355][   T72]      ipv6_add_addr+0x411/0x2000
[ 3160.476355][   T72]      inet6_addr_add+0x30e/0xa40
[ 3160.476355][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3160.476355][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.476355][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.476355][   T72]      netlink_unicast+0x449/0x710
[ 3160.476355][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.476355][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.476355][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.476355][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.476355][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.476355][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.476355][   T72] 
[ 3160.478323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3160.478323][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3160.478323][   T72]      ipv6_find_idev+0x102/0x170
[ 3160.478323][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3160.478323][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.478323][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.478323][   T72]      netlink_unicast+0x449/0x710
[ 3160.478323][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.478323][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.478323][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.478323][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.478323][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.478323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.478323][   T72] 
[ 3160.479843][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3160.479843][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3160.479843][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3160.479843][   T72]      ipv6_find_idev+0x102/0x170
[ 3160.479843][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3160.479843][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3160.479843][   T72]      netlink_rcv_skb+0x130/0x360
[ 3160.479843][   T72]      netlink_unicast+0x449/0x710
[ 3160.479843][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3160.479843][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3160.479843][   T72]      ___sys_sendmsg+0xee/0x170
[ 3160.479843][   T72]      __sys_sendmsg+0xcd/0x170
[ 3160.479843][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.479843][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.479843][   T72] 
[ 3160.481509][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3160.481761][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3160.481761][   T72]      dst_init+0x84/0x4a0
[ 3160.481761][   T72]      dst_alloc+0x97/0x150
[ 3160.481761][   T72]      ip6_dst_alloc+0x23/0x90
[ 3160.481761][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3160.481761][   T72]      ip6_pol_route+0x56f/0x840
[ 3160.481761][   T72]      fib6_rule_lookup+0x227/0x600
[ 3160.481761][   T72]      ip6_route_output_flags+0x251/0x460
[ 3160.481761][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3160.481761][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3160.481761][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3160.481761][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3160.481761][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3160.481761][   T72]      __sys_connect+0x217/0x2a0
[ 3160.481761][   T72]      __x64_sys_connect+0x72/0xb0
[ 3160.481761][   T72]      do_syscall_64+0xc6/0x1e0
[ 3160.481761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3160.481761][   T72] 
[ 3170.724639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3170.725112][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3170.725112][   T72]      netdev_get_by_index+0x5e/0x80
[ 3170.725112][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3170.725112][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3170.725112][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3170.725112][   T72]      ipv6_add_addr+0x411/0x2000
[ 3170.725112][   T72]      inet6_addr_add+0x30e/0xa40
[ 3170.725112][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3170.725112][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.725112][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.725112][   T72]      netlink_unicast+0x449/0x710
[ 3170.725112][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.725112][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.725112][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.725112][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.725112][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.725112][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.725112][   T72] 
[ 3170.727120][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3170.727120][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3170.727120][   T72]      ipv6_find_idev+0x102/0x170
[ 3170.727120][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3170.727120][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.727120][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.727120][   T72]      netlink_unicast+0x449/0x710
[ 3170.727120][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.727120][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.727120][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.727120][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.727120][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.727120][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.727120][   T72] 
[ 3170.728639][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3170.728639][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3170.728639][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3170.728639][   T72]      ipv6_find_idev+0x102/0x170
[ 3170.728639][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3170.728639][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.728639][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.728639][   T72]      netlink_unicast+0x449/0x710
[ 3170.728639][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.728639][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.728639][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.728639][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.728639][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.728639][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.728639][   T72] 
[ 3170.730304][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3170.730575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3170.730575][   T72]      netdev_get_by_index+0x5e/0x80
[ 3170.730575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3170.730575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3170.730575][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3170.730575][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3170.730575][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3170.730575][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3170.730575][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3170.730575][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3170.730575][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3170.730575][   T72]      vfs_write+0x9e5/0x10a0
[ 3170.730575][   T72]      ksys_write+0xf5/0x1e0
[ 3170.730575][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.730575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.730575][   T72] 
[ 3170.732403][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3170.732403][   T72]      netdev_get_by_index+0x5e/0x80
[ 3170.732403][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3170.732403][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3170.732403][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3170.732403][   T72]      ipv6_add_addr+0x411/0x2000
[ 3170.732403][   T72]      inet6_addr_add+0x30e/0xa40
[ 3170.732403][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3170.732403][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.732403][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.732403][   T72]      netlink_unicast+0x449/0x710
[ 3170.732403][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.732403][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.732403][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.732403][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.732403][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.732403][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.732403][   T72] 
[ 3170.734375][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3170.734375][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3170.734375][   T72]      ipv6_find_idev+0x102/0x170
[ 3170.734375][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3170.734375][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.734375][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.734375][   T72]      netlink_unicast+0x449/0x710
[ 3170.734375][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.734375][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.734375][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.734375][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.734375][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.734375][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.734375][   T72] 
[ 3170.735908][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3170.735908][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3170.735908][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3170.735908][   T72]      ipv6_find_idev+0x102/0x170
[ 3170.735908][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3170.735908][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3170.735908][   T72]      netlink_rcv_skb+0x130/0x360
[ 3170.735908][   T72]      netlink_unicast+0x449/0x710
[ 3170.735908][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3170.735908][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3170.735908][   T72]      ___sys_sendmsg+0xee/0x170
[ 3170.735908][   T72]      __sys_sendmsg+0xcd/0x170
[ 3170.735908][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.735908][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.735908][   T72] 
[ 3170.737577][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3170.737831][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3170.737831][   T72]      dst_init+0x84/0x4a0
[ 3170.737831][   T72]      dst_alloc+0x97/0x150
[ 3170.737831][   T72]      ip6_dst_alloc+0x23/0x90
[ 3170.737831][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3170.737831][   T72]      ip6_pol_route+0x56f/0x840
[ 3170.737831][   T72]      fib6_rule_lookup+0x227/0x600
[ 3170.737831][   T72]      ip6_route_output_flags+0x251/0x460
[ 3170.737831][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3170.737831][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3170.737831][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3170.737831][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3170.737831][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3170.737831][   T72]      __sys_connect+0x217/0x2a0
[ 3170.737831][   T72]      __x64_sys_connect+0x72/0xb0
[ 3170.737831][   T72]      do_syscall_64+0xc6/0x1e0
[ 3170.737831][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3170.737831][   T72] 
[ 3180.980628][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3180.981070][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3180.981070][   T72]      netdev_get_by_index+0x5e/0x80
[ 3180.981070][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3180.981070][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3180.981070][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3180.981070][   T72]      ipv6_add_addr+0x411/0x2000
[ 3180.981070][   T72]      inet6_addr_add+0x30e/0xa40
[ 3180.981070][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3180.981070][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.981070][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.981070][   T72]      netlink_unicast+0x449/0x710
[ 3180.981070][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.981070][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.981070][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.981070][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.981070][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.981070][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.981070][   T72] 
[ 3180.983055][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3180.983055][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3180.983055][   T72]      ipv6_find_idev+0x102/0x170
[ 3180.983055][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3180.983055][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.983055][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.983055][   T72]      netlink_unicast+0x449/0x710
[ 3180.983055][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.983055][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.983055][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.983055][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.983055][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.983055][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.983055][   T72] 
[ 3180.984581][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3180.984581][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3180.984581][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3180.984581][   T72]      ipv6_find_idev+0x102/0x170
[ 3180.984581][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3180.984581][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.984581][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.984581][   T72]      netlink_unicast+0x449/0x710
[ 3180.984581][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.984581][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.984581][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.984581][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.984581][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.984581][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.984581][   T72] 
[ 3180.986366][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3180.986653][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3180.986653][   T72]      netdev_get_by_index+0x5e/0x80
[ 3180.986653][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3180.986653][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3180.986653][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3180.986653][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3180.986653][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3180.986653][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3180.986653][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3180.986653][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3180.986653][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3180.986653][   T72]      vfs_write+0x9e5/0x10a0
[ 3180.986653][   T72]      ksys_write+0xf5/0x1e0
[ 3180.986653][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.986653][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.986653][   T72] 
[ 3180.988479][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3180.988479][   T72]      netdev_get_by_index+0x5e/0x80
[ 3180.988479][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3180.988479][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3180.988479][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3180.988479][   T72]      ipv6_add_addr+0x411/0x2000
[ 3180.988479][   T72]      inet6_addr_add+0x30e/0xa40
[ 3180.988479][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3180.988479][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.988479][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.988479][   T72]      netlink_unicast+0x449/0x710
[ 3180.988479][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.988479][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.988479][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.988479][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.988479][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.988479][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.988479][   T72] 
[ 3180.990439][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3180.990439][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3180.990439][   T72]      ipv6_find_idev+0x102/0x170
[ 3180.990439][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3180.990439][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.990439][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.990439][   T72]      netlink_unicast+0x449/0x710
[ 3180.990439][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.990439][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.990439][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.990439][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.990439][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.990439][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.990439][   T72] 
[ 3180.991966][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3180.991966][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3180.991966][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3180.991966][   T72]      ipv6_find_idev+0x102/0x170
[ 3180.991966][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3180.991966][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3180.991966][   T72]      netlink_rcv_skb+0x130/0x360
[ 3180.991966][   T72]      netlink_unicast+0x449/0x710
[ 3180.991966][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3180.991966][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3180.991966][   T72]      ___sys_sendmsg+0xee/0x170
[ 3180.991966][   T72]      __sys_sendmsg+0xcd/0x170
[ 3180.991966][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.991966][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.991966][   T72] 
[ 3180.993627][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3180.993864][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3180.993864][   T72]      dst_init+0x84/0x4a0
[ 3180.993864][   T72]      dst_alloc+0x97/0x150
[ 3180.993864][   T72]      ip6_dst_alloc+0x23/0x90
[ 3180.993864][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3180.993864][   T72]      ip6_pol_route+0x56f/0x840
[ 3180.993864][   T72]      fib6_rule_lookup+0x227/0x600
[ 3180.993864][   T72]      ip6_route_output_flags+0x251/0x460
[ 3180.993864][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3180.993864][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3180.993864][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3180.993864][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3180.993864][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3180.993864][   T72]      __sys_connect+0x217/0x2a0
[ 3180.993864][   T72]      __x64_sys_connect+0x72/0xb0
[ 3180.993864][   T72]      do_syscall_64+0xc6/0x1e0
[ 3180.993864][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3180.993864][   T72] 
[ 3191.236712][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3191.237146][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3191.237146][   T72]      netdev_get_by_index+0x5e/0x80
[ 3191.237146][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3191.237146][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3191.237146][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3191.237146][   T72]      ipv6_add_addr+0x411/0x2000
[ 3191.237146][   T72]      inet6_addr_add+0x30e/0xa40
[ 3191.237146][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3191.237146][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.237146][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.237146][   T72]      netlink_unicast+0x449/0x710
[ 3191.237146][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.237146][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.237146][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.237146][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.237146][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.237146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.237146][   T72] 
[ 3191.239115][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3191.239115][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3191.239115][   T72]      ipv6_find_idev+0x102/0x170
[ 3191.239115][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3191.239115][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.239115][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.239115][   T72]      netlink_unicast+0x449/0x710
[ 3191.239115][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.239115][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.239115][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.239115][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.239115][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.239115][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.239115][   T72] 
[ 3191.240626][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3191.240626][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3191.240626][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3191.240626][   T72]      ipv6_find_idev+0x102/0x170
[ 3191.240626][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3191.240626][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.240626][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.240626][   T72]      netlink_unicast+0x449/0x710
[ 3191.240626][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.240626][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.240626][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.240626][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.240626][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.240626][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.240626][   T72] 
[ 3191.242287][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3191.242554][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3191.242554][   T72]      netdev_get_by_index+0x5e/0x80
[ 3191.242554][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3191.242554][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3191.242554][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3191.242554][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3191.242554][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3191.242554][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3191.242554][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3191.242554][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3191.242554][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3191.242554][   T72]      vfs_write+0x9e5/0x10a0
[ 3191.242554][   T72]      ksys_write+0xf5/0x1e0
[ 3191.242554][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.242554][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.242554][   T72] 
[ 3191.244367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3191.244367][   T72]      netdev_get_by_index+0x5e/0x80
[ 3191.244367][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3191.244367][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3191.244367][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3191.244367][   T72]      ipv6_add_addr+0x411/0x2000
[ 3191.244367][   T72]      inet6_addr_add+0x30e/0xa40
[ 3191.244367][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3191.244367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.244367][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.244367][   T72]      netlink_unicast+0x449/0x710
[ 3191.244367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.244367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.244367][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.244367][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.244367][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.244367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.244367][   T72] 
[ 3191.246346][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3191.246346][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3191.246346][   T72]      ipv6_find_idev+0x102/0x170
[ 3191.246346][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3191.246346][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.246346][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.246346][   T72]      netlink_unicast+0x449/0x710
[ 3191.246346][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.246346][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.246346][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.246346][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.246346][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.246346][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.246346][   T72] 
[ 3191.248208][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3191.248208][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3191.248208][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3191.248208][   T72]      ipv6_find_idev+0x102/0x170
[ 3191.248208][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3191.248208][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3191.248208][   T72]      netlink_rcv_skb+0x130/0x360
[ 3191.248208][   T72]      netlink_unicast+0x449/0x710
[ 3191.248208][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3191.248208][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3191.248208][   T72]      ___sys_sendmsg+0xee/0x170
[ 3191.248208][   T72]      __sys_sendmsg+0xcd/0x170
[ 3191.248208][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.248208][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.248208][   T72] 
[ 3191.249862][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3191.250098][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3191.250098][   T72]      dst_init+0x84/0x4a0
[ 3191.250098][   T72]      dst_alloc+0x97/0x150
[ 3191.250098][   T72]      ip6_dst_alloc+0x23/0x90
[ 3191.250098][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3191.250098][   T72]      ip6_pol_route+0x56f/0x840
[ 3191.250098][   T72]      fib6_rule_lookup+0x227/0x600
[ 3191.250098][   T72]      ip6_route_output_flags+0x251/0x460
[ 3191.250098][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3191.250098][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3191.250098][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3191.250098][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3191.250098][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3191.250098][   T72]      __sys_connect+0x217/0x2a0
[ 3191.250098][   T72]      __x64_sys_connect+0x72/0xb0
[ 3191.250098][   T72]      do_syscall_64+0xc6/0x1e0
[ 3191.250098][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3191.250098][   T72] 
[ 3201.492704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3201.493144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3201.493144][   T72]      netdev_get_by_index+0x5e/0x80
[ 3201.493144][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3201.493144][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3201.493144][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3201.493144][   T72]      ipv6_add_addr+0x411/0x2000
[ 3201.493144][   T72]      inet6_addr_add+0x30e/0xa40
[ 3201.493144][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3201.493144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.493144][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.493144][   T72]      netlink_unicast+0x449/0x710
[ 3201.493144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.493144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.493144][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.493144][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.493144][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.493144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.493144][   T72] 
[ 3201.495120][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3201.495120][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3201.495120][   T72]      ipv6_find_idev+0x102/0x170
[ 3201.495120][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3201.495120][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.495120][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.495120][   T72]      netlink_unicast+0x449/0x710
[ 3201.495120][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.495120][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.495120][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.495120][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.495120][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.495120][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.495120][   T72] 
[ 3201.496750][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3201.496750][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3201.496750][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3201.496750][   T72]      ipv6_find_idev+0x102/0x170
[ 3201.496750][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3201.496750][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.496750][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.496750][   T72]      netlink_unicast+0x449/0x710
[ 3201.496750][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.496750][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.496750][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.496750][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.496750][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.496750][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.496750][   T72] 
[ 3201.498417][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3201.498691][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3201.498691][   T72]      netdev_get_by_index+0x5e/0x80
[ 3201.498691][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3201.498691][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3201.498691][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3201.498691][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3201.498691][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3201.498691][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3201.498691][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3201.498691][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3201.498691][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3201.498691][   T72]      vfs_write+0x9e5/0x10a0
[ 3201.498691][   T72]      ksys_write+0xf5/0x1e0
[ 3201.498691][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.498691][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.498691][   T72] 
[ 3201.500511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3201.500511][   T72]      netdev_get_by_index+0x5e/0x80
[ 3201.500511][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3201.500511][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3201.500511][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3201.500511][   T72]      ipv6_add_addr+0x411/0x2000
[ 3201.500511][   T72]      inet6_addr_add+0x30e/0xa40
[ 3201.500511][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3201.500511][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.500511][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.500511][   T72]      netlink_unicast+0x449/0x710
[ 3201.500511][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.500511][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.500511][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.500511][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.500511][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.500511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.500511][   T72] 
[ 3201.502466][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3201.502466][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3201.502466][   T72]      ipv6_find_idev+0x102/0x170
[ 3201.502466][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3201.502466][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.502466][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.502466][   T72]      netlink_unicast+0x449/0x710
[ 3201.502466][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.502466][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.502466][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.502466][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.502466][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.502466][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.502466][   T72] 
[ 3201.503978][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3201.503978][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3201.503978][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3201.503978][   T72]      ipv6_find_idev+0x102/0x170
[ 3201.503978][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3201.503978][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3201.503978][   T72]      netlink_rcv_skb+0x130/0x360
[ 3201.503978][   T72]      netlink_unicast+0x449/0x710
[ 3201.503978][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3201.503978][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3201.503978][   T72]      ___sys_sendmsg+0xee/0x170
[ 3201.503978][   T72]      __sys_sendmsg+0xcd/0x170
[ 3201.503978][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.503978][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.503978][   T72] 
[ 3201.505643][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3201.505874][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3201.505874][   T72]      dst_init+0x84/0x4a0
[ 3201.505874][   T72]      dst_alloc+0x97/0x150
[ 3201.505874][   T72]      ip6_dst_alloc+0x23/0x90
[ 3201.505874][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3201.505874][   T72]      ip6_pol_route+0x56f/0x840
[ 3201.505874][   T72]      fib6_rule_lookup+0x227/0x600
[ 3201.505874][   T72]      ip6_route_output_flags+0x251/0x460
[ 3201.505874][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3201.505874][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3201.505874][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3201.505874][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3201.505874][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3201.505874][   T72]      __sys_connect+0x217/0x2a0
[ 3201.505874][   T72]      __x64_sys_connect+0x72/0xb0
[ 3201.505874][   T72]      do_syscall_64+0xc6/0x1e0
[ 3201.505874][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3201.505874][   T72] 
[ 3211.748706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3211.749141][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3211.749141][   T72]      netdev_get_by_index+0x5e/0x80
[ 3211.749141][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3211.749141][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3211.749141][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3211.749141][   T72]      ipv6_add_addr+0x411/0x2000
[ 3211.749141][   T72]      inet6_addr_add+0x30e/0xa40
[ 3211.749141][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3211.749141][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.749141][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.749141][   T72]      netlink_unicast+0x449/0x710
[ 3211.749141][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.749141][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.749141][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.749141][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.749141][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.749141][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.749141][   T72] 
[ 3211.751111][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3211.751111][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3211.751111][   T72]      ipv6_find_idev+0x102/0x170
[ 3211.751111][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3211.751111][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.751111][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.751111][   T72]      netlink_unicast+0x449/0x710
[ 3211.751111][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.751111][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.751111][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.751111][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.751111][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.751111][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.751111][   T72] 
[ 3211.752629][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3211.752629][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3211.752629][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3211.752629][   T72]      ipv6_find_idev+0x102/0x170
[ 3211.752629][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3211.752629][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.752629][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.752629][   T72]      netlink_unicast+0x449/0x710
[ 3211.752629][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.752629][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.752629][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.752629][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.752629][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.752629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.752629][   T72] 
[ 3211.754295][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3211.754595][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3211.754595][   T72]      netdev_get_by_index+0x5e/0x80
[ 3211.754595][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3211.754595][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3211.754595][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3211.754595][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3211.754595][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3211.754595][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3211.754595][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3211.754595][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3211.754595][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3211.754595][   T72]      vfs_write+0x9e5/0x10a0
[ 3211.754595][   T72]      ksys_write+0xf5/0x1e0
[ 3211.754595][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.754595][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.754595][   T72] 
[ 3211.756420][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3211.756420][   T72]      netdev_get_by_index+0x5e/0x80
[ 3211.756420][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3211.756420][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3211.756420][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3211.756420][   T72]      ipv6_add_addr+0x411/0x2000
[ 3211.756420][   T72]      inet6_addr_add+0x30e/0xa40
[ 3211.756420][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3211.756420][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.756420][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.756420][   T72]      netlink_unicast+0x449/0x710
[ 3211.756420][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.756420][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.756420][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.756420][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.756420][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.756420][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.756420][   T72] 
[ 3211.758388][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3211.758388][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3211.758388][   T72]      ipv6_find_idev+0x102/0x170
[ 3211.758388][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3211.758388][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.758388][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.758388][   T72]      netlink_unicast+0x449/0x710
[ 3211.758388][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.758388][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.758388][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.758388][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.758388][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.758388][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.758388][   T72] 
[ 3211.759900][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3211.759900][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3211.759900][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3211.759900][   T72]      ipv6_find_idev+0x102/0x170
[ 3211.759900][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3211.759900][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3211.759900][   T72]      netlink_rcv_skb+0x130/0x360
[ 3211.759900][   T72]      netlink_unicast+0x449/0x710
[ 3211.759900][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3211.759900][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3211.759900][   T72]      ___sys_sendmsg+0xee/0x170
[ 3211.759900][   T72]      __sys_sendmsg+0xcd/0x170
[ 3211.759900][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.759900][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.759900][   T72] 
[ 3211.761563][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3211.761808][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3211.761808][   T72]      dst_init+0x84/0x4a0
[ 3211.761808][   T72]      dst_alloc+0x97/0x150
[ 3211.761808][   T72]      ip6_dst_alloc+0x23/0x90
[ 3211.761808][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3211.761808][   T72]      ip6_pol_route+0x56f/0x840
[ 3211.761808][   T72]      fib6_rule_lookup+0x227/0x600
[ 3211.761808][   T72]      ip6_route_output_flags+0x251/0x460
[ 3211.761808][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3211.761808][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3211.761808][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3211.761808][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3211.761808][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3211.761808][   T72]      __sys_connect+0x217/0x2a0
[ 3211.761808][   T72]      __x64_sys_connect+0x72/0xb0
[ 3211.761808][   T72]      do_syscall_64+0xc6/0x1e0
[ 3211.761808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3211.761808][   T72] 
[ 3222.004709][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3222.005138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3222.005138][   T72]      netdev_get_by_index+0x5e/0x80
[ 3222.005138][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3222.005138][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3222.005138][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3222.005138][   T72]      ipv6_add_addr+0x411/0x2000
[ 3222.005138][   T72]      inet6_addr_add+0x30e/0xa40
[ 3222.005138][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3222.005138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.005138][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.005138][   T72]      netlink_unicast+0x449/0x710
[ 3222.005138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.005138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.005138][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.005138][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.005138][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.005138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.005138][   T72] 
[ 3222.007242][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3222.007242][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3222.007242][   T72]      ipv6_find_idev+0x102/0x170
[ 3222.007242][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3222.007242][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.007242][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.007242][   T72]      netlink_unicast+0x449/0x710
[ 3222.007242][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.007242][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.007242][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.007242][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.007242][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.007242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.007242][   T72] 
[ 3222.008759][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3222.008759][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3222.008759][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3222.008759][   T72]      ipv6_find_idev+0x102/0x170
[ 3222.008759][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3222.008759][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.008759][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.008759][   T72]      netlink_unicast+0x449/0x710
[ 3222.008759][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.008759][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.008759][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.008759][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.008759][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.008759][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.008759][   T72] 
[ 3222.010412][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3222.010691][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3222.010691][   T72]      netdev_get_by_index+0x5e/0x80
[ 3222.010691][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3222.010691][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3222.010691][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3222.010691][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3222.010691][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3222.010691][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3222.010691][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3222.010691][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3222.010691][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3222.010691][   T72]      vfs_write+0x9e5/0x10a0
[ 3222.010691][   T72]      ksys_write+0xf5/0x1e0
[ 3222.010691][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.010691][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.010691][   T72] 
[ 3222.012502][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3222.012502][   T72]      netdev_get_by_index+0x5e/0x80
[ 3222.012502][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3222.012502][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3222.012502][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3222.012502][   T72]      ipv6_add_addr+0x411/0x2000
[ 3222.012502][   T72]      inet6_addr_add+0x30e/0xa40
[ 3222.012502][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3222.012502][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.012502][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.012502][   T72]      netlink_unicast+0x449/0x710
[ 3222.012502][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.012502][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.012502][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.012502][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.012502][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.012502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.012502][   T72] 
[ 3222.014458][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3222.014458][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3222.014458][   T72]      ipv6_find_idev+0x102/0x170
[ 3222.014458][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3222.014458][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.014458][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.014458][   T72]      netlink_unicast+0x449/0x710
[ 3222.014458][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.014458][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.014458][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.014458][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.014458][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.014458][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.014458][   T72] 
[ 3222.015972][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3222.015972][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3222.015972][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3222.015972][   T72]      ipv6_find_idev+0x102/0x170
[ 3222.015972][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3222.015972][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3222.015972][   T72]      netlink_rcv_skb+0x130/0x360
[ 3222.015972][   T72]      netlink_unicast+0x449/0x710
[ 3222.015972][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3222.015972][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3222.015972][   T72]      ___sys_sendmsg+0xee/0x170
[ 3222.015972][   T72]      __sys_sendmsg+0xcd/0x170
[ 3222.015972][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.015972][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.015972][   T72] 
[ 3222.017625][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3222.017858][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3222.017858][   T72]      dst_init+0x84/0x4a0
[ 3222.017858][   T72]      dst_alloc+0x97/0x150
[ 3222.017858][   T72]      ip6_dst_alloc+0x23/0x90
[ 3222.017858][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3222.017858][   T72]      ip6_pol_route+0x56f/0x840
[ 3222.017858][   T72]      fib6_rule_lookup+0x227/0x600
[ 3222.017858][   T72]      ip6_route_output_flags+0x251/0x460
[ 3222.017858][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3222.017858][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3222.017858][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3222.017858][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3222.017858][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3222.017858][   T72]      __sys_connect+0x217/0x2a0
[ 3222.017858][   T72]      __x64_sys_connect+0x72/0xb0
[ 3222.017858][   T72]      do_syscall_64+0xc6/0x1e0
[ 3222.017858][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3222.017858][   T72] 
[ 3232.020703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3232.021129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3232.021129][   T72]      netdev_get_by_index+0x5e/0x80
[ 3232.021129][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3232.021129][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3232.021129][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3232.021129][   T72]      ipv6_add_addr+0x411/0x2000
[ 3232.021129][   T72]      inet6_addr_add+0x30e/0xa40
[ 3232.021129][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3232.021129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.021129][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.021129][   T72]      netlink_unicast+0x449/0x710
[ 3232.021129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.021129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.021129][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.021129][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.021129][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.021129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.021129][   T72] 
[ 3232.023105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3232.023105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3232.023105][   T72]      ipv6_find_idev+0x102/0x170
[ 3232.023105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3232.023105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.023105][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.023105][   T72]      netlink_unicast+0x449/0x710
[ 3232.023105][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.023105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.023105][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.023105][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.023105][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.023105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.023105][   T72] 
[ 3232.024626][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3232.024626][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3232.024626][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3232.024626][   T72]      ipv6_find_idev+0x102/0x170
[ 3232.024626][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3232.024626][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.024626][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.024626][   T72]      netlink_unicast+0x449/0x710
[ 3232.024626][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.024626][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.024626][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.024626][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.024626][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.024626][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.024626][   T72] 
[ 3232.026281][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3232.026544][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3232.026544][   T72]      netdev_get_by_index+0x5e/0x80
[ 3232.026544][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3232.026544][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3232.026544][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3232.026544][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3232.026544][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3232.026544][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3232.026544][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3232.026544][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3232.026544][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3232.026544][   T72]      vfs_write+0x9e5/0x10a0
[ 3232.026544][   T72]      ksys_write+0xf5/0x1e0
[ 3232.026544][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.026544][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.026544][   T72] 
[ 3232.028361][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3232.028361][   T72]      netdev_get_by_index+0x5e/0x80
[ 3232.028361][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3232.028361][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3232.028361][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3232.028361][   T72]      ipv6_add_addr+0x411/0x2000
[ 3232.028361][   T72]      inet6_addr_add+0x30e/0xa40
[ 3232.028361][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3232.028361][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.028361][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.028361][   T72]      netlink_unicast+0x449/0x710
[ 3232.028361][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.028361][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.028361][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.028361][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.028361][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.028361][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.028361][   T72] 
[ 3232.030321][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3232.030321][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3232.030321][   T72]      ipv6_find_idev+0x102/0x170
[ 3232.030321][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3232.030321][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.030321][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.030321][   T72]      netlink_unicast+0x449/0x710
[ 3232.030321][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.030321][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.030321][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.030321][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.030321][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.030321][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.030321][   T72] 
[ 3232.031926][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3232.031926][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3232.031926][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3232.031926][   T72]      ipv6_find_idev+0x102/0x170
[ 3232.031926][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3232.031926][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3232.031926][   T72]      netlink_rcv_skb+0x130/0x360
[ 3232.031926][   T72]      netlink_unicast+0x449/0x710
[ 3232.031926][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3232.031926][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3232.031926][   T72]      ___sys_sendmsg+0xee/0x170
[ 3232.031926][   T72]      __sys_sendmsg+0xcd/0x170
[ 3232.031926][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.031926][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.031926][   T72] 
[ 3232.033597][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3232.033837][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3232.033837][   T72]      dst_init+0x84/0x4a0
[ 3232.033837][   T72]      dst_alloc+0x97/0x150
[ 3232.033837][   T72]      ip6_dst_alloc+0x23/0x90
[ 3232.033837][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3232.033837][   T72]      ip6_pol_route+0x56f/0x840
[ 3232.033837][   T72]      fib6_rule_lookup+0x227/0x600
[ 3232.033837][   T72]      ip6_route_output_flags+0x251/0x460
[ 3232.033837][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3232.033837][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3232.033837][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3232.033837][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3232.033837][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3232.033837][   T72]      __sys_connect+0x217/0x2a0
[ 3232.033837][   T72]      __x64_sys_connect+0x72/0xb0
[ 3232.033837][   T72]      do_syscall_64+0xc6/0x1e0
[ 3232.033837][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3232.033837][   T72] 
[ 3242.276727][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3242.277156][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3242.277156][   T72]      netdev_get_by_index+0x5e/0x80
[ 3242.277156][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3242.277156][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3242.277156][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3242.277156][   T72]      ipv6_add_addr+0x411/0x2000
[ 3242.277156][   T72]      inet6_addr_add+0x30e/0xa40
[ 3242.277156][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3242.277156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.277156][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.277156][   T72]      netlink_unicast+0x449/0x710
[ 3242.277156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.277156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.277156][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.277156][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.277156][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.277156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.277156][   T72] 
[ 3242.279124][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3242.279124][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3242.279124][   T72]      ipv6_find_idev+0x102/0x170
[ 3242.279124][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3242.279124][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.279124][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.279124][   T72]      netlink_unicast+0x449/0x710
[ 3242.279124][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.279124][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.279124][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.279124][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.279124][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.279124][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.279124][   T72] 
[ 3242.280640][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3242.280640][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3242.280640][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3242.280640][   T72]      ipv6_find_idev+0x102/0x170
[ 3242.280640][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3242.280640][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.280640][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.280640][   T72]      netlink_unicast+0x449/0x710
[ 3242.280640][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.280640][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.280640][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.280640][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.280640][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.280640][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.280640][   T72] 
[ 3242.282301][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3242.282618][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3242.282618][   T72]      netdev_get_by_index+0x5e/0x80
[ 3242.282618][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3242.282618][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3242.282618][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3242.282618][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3242.282618][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3242.282618][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3242.282618][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3242.282618][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3242.282618][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3242.282618][   T72]      vfs_write+0x9e5/0x10a0
[ 3242.282618][   T72]      ksys_write+0xf5/0x1e0
[ 3242.282618][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.282618][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.282618][   T72] 
[ 3242.284436][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3242.284436][   T72]      netdev_get_by_index+0x5e/0x80
[ 3242.284436][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3242.284436][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3242.284436][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3242.284436][   T72]      ipv6_add_addr+0x411/0x2000
[ 3242.284436][   T72]      inet6_addr_add+0x30e/0xa40
[ 3242.284436][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3242.284436][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.284436][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.284436][   T72]      netlink_unicast+0x449/0x710
[ 3242.284436][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.284436][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.284436][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.284436][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.284436][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.284436][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.284436][   T72] 
[ 3242.286415][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3242.286415][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3242.286415][   T72]      ipv6_find_idev+0x102/0x170
[ 3242.286415][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3242.286415][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.286415][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.286415][   T72]      netlink_unicast+0x449/0x710
[ 3242.286415][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.286415][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.286415][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.286415][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.286415][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.286415][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.286415][   T72] 
[ 3242.287923][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3242.287923][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3242.287923][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3242.287923][   T72]      ipv6_find_idev+0x102/0x170
[ 3242.287923][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3242.287923][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3242.287923][   T72]      netlink_rcv_skb+0x130/0x360
[ 3242.287923][   T72]      netlink_unicast+0x449/0x710
[ 3242.287923][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3242.287923][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3242.287923][   T72]      ___sys_sendmsg+0xee/0x170
[ 3242.287923][   T72]      __sys_sendmsg+0xcd/0x170
[ 3242.287923][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.287923][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.287923][   T72] 
[ 3242.289579][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3242.289837][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3242.289837][   T72]      dst_init+0x84/0x4a0
[ 3242.289837][   T72]      dst_alloc+0x97/0x150
[ 3242.289837][   T72]      ip6_dst_alloc+0x23/0x90
[ 3242.289837][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3242.289837][   T72]      ip6_pol_route+0x56f/0x840
[ 3242.289837][   T72]      fib6_rule_lookup+0x227/0x600
[ 3242.289837][   T72]      ip6_route_output_flags+0x251/0x460
[ 3242.289837][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3242.289837][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3242.289837][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3242.289837][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3242.289837][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3242.289837][   T72]      __sys_connect+0x217/0x2a0
[ 3242.289837][   T72]      __x64_sys_connect+0x72/0xb0
[ 3242.289837][   T72]      do_syscall_64+0xc6/0x1e0
[ 3242.289837][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3242.289837][   T72] 
[ 3252.404706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3252.405139][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3252.405139][   T72]      netdev_get_by_index+0x5e/0x80
[ 3252.405139][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3252.405139][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3252.405139][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3252.405139][   T72]      ipv6_add_addr+0x411/0x2000
[ 3252.405139][   T72]      inet6_addr_add+0x30e/0xa40
[ 3252.405139][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3252.405139][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.405139][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.405139][   T72]      netlink_unicast+0x449/0x710
[ 3252.405139][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.405139][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.405139][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.405139][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.405139][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.405139][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.405139][   T72] 
[ 3252.407112][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3252.407112][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3252.407112][   T72]      ipv6_find_idev+0x102/0x170
[ 3252.407112][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3252.407112][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.407112][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.407112][   T72]      netlink_unicast+0x449/0x710
[ 3252.407112][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.407112][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.407112][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.407112][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.407112][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.407112][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.407112][   T72] 
[ 3252.408626][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3252.408626][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3252.408626][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3252.408626][   T72]      ipv6_find_idev+0x102/0x170
[ 3252.408626][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3252.408626][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.408626][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.408626][   T72]      netlink_unicast+0x449/0x710
[ 3252.408626][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.408626][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.408626][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.408626][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.408626][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.408626][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.408626][   T72] 
[ 3252.410276][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3252.410536][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3252.410536][   T72]      netdev_get_by_index+0x5e/0x80
[ 3252.410536][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3252.410536][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3252.410536][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3252.410536][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3252.410536][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3252.410536][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3252.410536][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3252.410536][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3252.410536][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3252.410536][   T72]      vfs_write+0x9e5/0x10a0
[ 3252.410536][   T72]      ksys_write+0xf5/0x1e0
[ 3252.410536][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.410536][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.410536][   T72] 
[ 3252.412858][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3252.412858][   T72]      netdev_get_by_index+0x5e/0x80
[ 3252.412858][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3252.412858][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3252.412858][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3252.412858][   T72]      ipv6_add_addr+0x411/0x2000
[ 3252.412858][   T72]      inet6_addr_add+0x30e/0xa40
[ 3252.412858][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3252.412858][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.412858][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.412858][   T72]      netlink_unicast+0x449/0x710
[ 3252.412858][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.412858][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.412858][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.412858][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.412858][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.412858][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.412858][   T72] 
[ 3252.414812][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3252.414812][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3252.414812][   T72]      ipv6_find_idev+0x102/0x170
[ 3252.414812][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3252.414812][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.414812][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.414812][   T72]      netlink_unicast+0x449/0x710
[ 3252.414812][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.414812][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.414812][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.414812][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.414812][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.414812][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.414812][   T72] 
[ 3252.416324][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3252.416324][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3252.416324][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3252.416324][   T72]      ipv6_find_idev+0x102/0x170
[ 3252.416324][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3252.416324][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3252.416324][   T72]      netlink_rcv_skb+0x130/0x360
[ 3252.416324][   T72]      netlink_unicast+0x449/0x710
[ 3252.416324][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3252.416324][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3252.416324][   T72]      ___sys_sendmsg+0xee/0x170
[ 3252.416324][   T72]      __sys_sendmsg+0xcd/0x170
[ 3252.416324][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.416324][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.416324][   T72] 
[ 3252.417980][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3252.418216][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3252.418216][   T72]      dst_init+0x84/0x4a0
[ 3252.418216][   T72]      dst_alloc+0x97/0x150
[ 3252.418216][   T72]      ip6_dst_alloc+0x23/0x90
[ 3252.418216][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3252.418216][   T72]      ip6_pol_route+0x56f/0x840
[ 3252.418216][   T72]      fib6_rule_lookup+0x227/0x600
[ 3252.418216][   T72]      ip6_route_output_flags+0x251/0x460
[ 3252.418216][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3252.418216][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3252.418216][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3252.418216][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3252.418216][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3252.418216][   T72]      __sys_connect+0x217/0x2a0
[ 3252.418216][   T72]      __x64_sys_connect+0x72/0xb0
[ 3252.418216][   T72]      do_syscall_64+0xc6/0x1e0
[ 3252.418216][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3252.418216][   T72] 
[ 3262.660705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3262.661138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3262.661138][   T72]      netdev_get_by_index+0x5e/0x80
[ 3262.661138][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3262.661138][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3262.661138][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3262.661138][   T72]      ipv6_add_addr+0x411/0x2000
[ 3262.661138][   T72]      inet6_addr_add+0x30e/0xa40
[ 3262.661138][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3262.661138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.661138][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.661138][   T72]      netlink_unicast+0x449/0x710
[ 3262.661138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.661138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.661138][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.661138][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.661138][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.661138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.661138][   T72] 
[ 3262.663104][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3262.663104][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3262.663104][   T72]      ipv6_find_idev+0x102/0x170
[ 3262.663104][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3262.663104][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.663104][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.663104][   T72]      netlink_unicast+0x449/0x710
[ 3262.663104][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.663104][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.663104][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.663104][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.663104][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.663104][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.663104][   T72] 
[ 3262.664616][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3262.664616][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3262.664616][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3262.664616][   T72]      ipv6_find_idev+0x102/0x170
[ 3262.664616][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3262.664616][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.664616][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.664616][   T72]      netlink_unicast+0x449/0x710
[ 3262.664616][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.664616][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.664616][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.664616][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.664616][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.664616][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.664616][   T72] 
[ 3262.666308][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3262.666575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3262.666575][   T72]      netdev_get_by_index+0x5e/0x80
[ 3262.666575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3262.666575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3262.666575][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3262.666575][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3262.666575][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3262.666575][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3262.666575][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3262.666575][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3262.666575][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3262.666575][   T72]      vfs_write+0x9e5/0x10a0
[ 3262.666575][   T72]      ksys_write+0xf5/0x1e0
[ 3262.666575][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.666575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.666575][   T72] 
[ 3262.668387][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3262.668387][   T72]      netdev_get_by_index+0x5e/0x80
[ 3262.668387][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3262.668387][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3262.668387][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3262.668387][   T72]      ipv6_add_addr+0x411/0x2000
[ 3262.668387][   T72]      inet6_addr_add+0x30e/0xa40
[ 3262.668387][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3262.668387][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.668387][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.668387][   T72]      netlink_unicast+0x449/0x710
[ 3262.668387][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.668387][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.668387][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.668387][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.668387][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.668387][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.668387][   T72] 
[ 3262.670348][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3262.670348][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3262.670348][   T72]      ipv6_find_idev+0x102/0x170
[ 3262.670348][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3262.670348][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.670348][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.670348][   T72]      netlink_unicast+0x449/0x710
[ 3262.670348][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.670348][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.670348][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.670348][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.670348][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.670348][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.670348][   T72] 
[ 3262.671857][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3262.671857][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3262.671857][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3262.671857][   T72]      ipv6_find_idev+0x102/0x170
[ 3262.671857][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3262.671857][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3262.671857][   T72]      netlink_rcv_skb+0x130/0x360
[ 3262.671857][   T72]      netlink_unicast+0x449/0x710
[ 3262.671857][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3262.671857][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3262.671857][   T72]      ___sys_sendmsg+0xee/0x170
[ 3262.671857][   T72]      __sys_sendmsg+0xcd/0x170
[ 3262.671857][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.671857][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.671857][   T72] 
[ 3262.673518][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3262.673768][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3262.673768][   T72]      dst_init+0x84/0x4a0
[ 3262.673768][   T72]      dst_alloc+0x97/0x150
[ 3262.673768][   T72]      ip6_dst_alloc+0x23/0x90
[ 3262.673768][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3262.673768][   T72]      ip6_pol_route+0x56f/0x840
[ 3262.673768][   T72]      fib6_rule_lookup+0x227/0x600
[ 3262.673768][   T72]      ip6_route_output_flags+0x251/0x460
[ 3262.673768][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3262.673768][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3262.673768][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3262.673768][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3262.673768][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3262.673768][   T72]      __sys_connect+0x217/0x2a0
[ 3262.673768][   T72]      __x64_sys_connect+0x72/0xb0
[ 3262.673768][   T72]      do_syscall_64+0xc6/0x1e0
[ 3262.673768][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3262.673768][   T72] 
[ 3272.916703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3272.917136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3272.917136][   T72]      netdev_get_by_index+0x5e/0x80
[ 3272.917136][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3272.917136][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3272.917136][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3272.917136][   T72]      ipv6_add_addr+0x411/0x2000
[ 3272.917136][   T72]      inet6_addr_add+0x30e/0xa40
[ 3272.917136][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3272.917136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.917136][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.917136][   T72]      netlink_unicast+0x449/0x710
[ 3272.917136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.917136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.917136][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.917136][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.917136][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.917136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.917136][   T72] 
[ 3272.919106][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3272.919106][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3272.919106][   T72]      ipv6_find_idev+0x102/0x170
[ 3272.919106][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3272.919106][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.919106][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.919106][   T72]      netlink_unicast+0x449/0x710
[ 3272.919106][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.919106][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.919106][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.919106][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.919106][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.919106][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.919106][   T72] 
[ 3272.920617][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3272.920617][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3272.920617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3272.920617][   T72]      ipv6_find_idev+0x102/0x170
[ 3272.920617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3272.920617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.920617][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.920617][   T72]      netlink_unicast+0x449/0x710
[ 3272.920617][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.920617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.920617][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.920617][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.920617][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.920617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.920617][   T72] 
[ 3272.922641][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3272.922910][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3272.922910][   T72]      netdev_get_by_index+0x5e/0x80
[ 3272.922910][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3272.922910][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3272.922910][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3272.922910][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3272.922910][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3272.922910][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3272.922910][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3272.922910][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3272.922910][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3272.922910][   T72]      vfs_write+0x9e5/0x10a0
[ 3272.922910][   T72]      ksys_write+0xf5/0x1e0
[ 3272.922910][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.922910][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.922910][   T72] 
[ 3272.924730][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3272.924730][   T72]      netdev_get_by_index+0x5e/0x80
[ 3272.924730][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3272.924730][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3272.924730][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3272.924730][   T72]      ipv6_add_addr+0x411/0x2000
[ 3272.924730][   T72]      inet6_addr_add+0x30e/0xa40
[ 3272.924730][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3272.924730][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.924730][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.924730][   T72]      netlink_unicast+0x449/0x710
[ 3272.924730][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.924730][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.924730][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.924730][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.924730][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.924730][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.924730][   T72] 
[ 3272.926697][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3272.926697][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3272.926697][   T72]      ipv6_find_idev+0x102/0x170
[ 3272.926697][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3272.926697][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.926697][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.926697][   T72]      netlink_unicast+0x449/0x710
[ 3272.926697][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.926697][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.926697][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.926697][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.926697][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.926697][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.926697][   T72] 
[ 3272.928206][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3272.928206][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3272.928206][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3272.928206][   T72]      ipv6_find_idev+0x102/0x170
[ 3272.928206][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3272.928206][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3272.928206][   T72]      netlink_rcv_skb+0x130/0x360
[ 3272.928206][   T72]      netlink_unicast+0x449/0x710
[ 3272.928206][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3272.928206][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3272.928206][   T72]      ___sys_sendmsg+0xee/0x170
[ 3272.928206][   T72]      __sys_sendmsg+0xcd/0x170
[ 3272.928206][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.928206][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.928206][   T72] 
[ 3272.929854][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3272.930093][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3272.930093][   T72]      dst_init+0x84/0x4a0
[ 3272.930093][   T72]      dst_alloc+0x97/0x150
[ 3272.930093][   T72]      ip6_dst_alloc+0x23/0x90
[ 3272.930093][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3272.930093][   T72]      ip6_pol_route+0x56f/0x840
[ 3272.930093][   T72]      fib6_rule_lookup+0x227/0x600
[ 3272.930093][   T72]      ip6_route_output_flags+0x251/0x460
[ 3272.930093][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3272.930093][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3272.930093][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3272.930093][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3272.930093][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3272.930093][   T72]      __sys_connect+0x217/0x2a0
[ 3272.930093][   T72]      __x64_sys_connect+0x72/0xb0
[ 3272.930093][   T72]      do_syscall_64+0xc6/0x1e0
[ 3272.930093][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3272.930093][   T72] 
[ 3283.164709][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3283.165154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3283.165154][   T72]      netdev_get_by_index+0x5e/0x80
[ 3283.165154][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3283.165154][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3283.165154][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3283.165154][   T72]      ipv6_add_addr+0x411/0x2000
[ 3283.165154][   T72]      inet6_addr_add+0x30e/0xa40
[ 3283.165154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3283.165154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.165154][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.165154][   T72]      netlink_unicast+0x449/0x710
[ 3283.165154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.165154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.165154][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.165154][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.165154][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.165154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.165154][   T72] 
[ 3283.167170][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3283.167170][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3283.167170][   T72]      ipv6_find_idev+0x102/0x170
[ 3283.167170][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3283.167170][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.167170][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.167170][   T72]      netlink_unicast+0x449/0x710
[ 3283.167170][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.167170][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.167170][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.167170][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.167170][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.167170][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.167170][   T72] 
[ 3283.168684][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3283.168684][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3283.168684][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3283.168684][   T72]      ipv6_find_idev+0x102/0x170
[ 3283.168684][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3283.168684][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.168684][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.168684][   T72]      netlink_unicast+0x449/0x710
[ 3283.168684][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.168684][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.168684][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.168684][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.168684][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.168684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.168684][   T72] 
[ 3283.170340][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3283.170612][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3283.170612][   T72]      netdev_get_by_index+0x5e/0x80
[ 3283.170612][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3283.170612][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3283.170612][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3283.170612][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3283.170612][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3283.170612][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3283.170612][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3283.170612][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3283.170612][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3283.170612][   T72]      vfs_write+0x9e5/0x10a0
[ 3283.170612][   T72]      ksys_write+0xf5/0x1e0
[ 3283.170612][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.170612][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.170612][   T72] 
[ 3283.172425][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3283.172425][   T72]      netdev_get_by_index+0x5e/0x80
[ 3283.172425][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3283.172425][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3283.172425][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3283.172425][   T72]      ipv6_add_addr+0x411/0x2000
[ 3283.172425][   T72]      inet6_addr_add+0x30e/0xa40
[ 3283.172425][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3283.172425][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.172425][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.172425][   T72]      netlink_unicast+0x449/0x710
[ 3283.172425][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.172425][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.172425][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.172425][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.172425][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.172425][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.172425][   T72] 
[ 3283.174380][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3283.174380][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3283.174380][   T72]      ipv6_find_idev+0x102/0x170
[ 3283.174380][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3283.174380][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.174380][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.174380][   T72]      netlink_unicast+0x449/0x710
[ 3283.174380][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.174380][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.174380][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.174380][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.174380][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.174380][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.174380][   T72] 
[ 3283.175892][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3283.175892][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3283.175892][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3283.175892][   T72]      ipv6_find_idev+0x102/0x170
[ 3283.175892][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3283.175892][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3283.175892][   T72]      netlink_rcv_skb+0x130/0x360
[ 3283.175892][   T72]      netlink_unicast+0x449/0x710
[ 3283.175892][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3283.175892][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3283.175892][   T72]      ___sys_sendmsg+0xee/0x170
[ 3283.175892][   T72]      __sys_sendmsg+0xcd/0x170
[ 3283.175892][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.175892][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.175892][   T72] 
[ 3283.177540][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3283.177805][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3283.177805][   T72]      dst_init+0x84/0x4a0
[ 3283.177805][   T72]      dst_alloc+0x97/0x150
[ 3283.177805][   T72]      ip6_dst_alloc+0x23/0x90
[ 3283.177805][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3283.177805][   T72]      ip6_pol_route+0x56f/0x840
[ 3283.177805][   T72]      fib6_rule_lookup+0x227/0x600
[ 3283.177805][   T72]      ip6_route_output_flags+0x251/0x460
[ 3283.177805][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3283.177805][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3283.177805][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3283.177805][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3283.177805][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3283.177805][   T72]      __sys_connect+0x217/0x2a0
[ 3283.177805][   T72]      __x64_sys_connect+0x72/0xb0
[ 3283.177805][   T72]      do_syscall_64+0xc6/0x1e0
[ 3283.177805][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3283.177805][   T72] 
[ 3293.420701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3293.421133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3293.421133][   T72]      netdev_get_by_index+0x5e/0x80
[ 3293.421133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3293.421133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3293.421133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3293.421133][   T72]      ipv6_add_addr+0x411/0x2000
[ 3293.421133][   T72]      inet6_addr_add+0x30e/0xa40
[ 3293.421133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3293.421133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.421133][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.421133][   T72]      netlink_unicast+0x449/0x710
[ 3293.421133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.421133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.421133][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.421133][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.421133][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.421133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.421133][   T72] 
[ 3293.423101][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3293.423101][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3293.423101][   T72]      ipv6_find_idev+0x102/0x170
[ 3293.423101][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3293.423101][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.423101][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.423101][   T72]      netlink_unicast+0x449/0x710
[ 3293.423101][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.423101][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.423101][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.423101][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.423101][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.423101][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.423101][   T72] 
[ 3293.424608][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3293.424608][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3293.424608][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3293.424608][   T72]      ipv6_find_idev+0x102/0x170
[ 3293.424608][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3293.424608][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.424608][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.424608][   T72]      netlink_unicast+0x449/0x710
[ 3293.424608][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.424608][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.424608][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.424608][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.424608][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.424608][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.424608][   T72] 
[ 3293.426261][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3293.426526][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3293.426526][   T72]      netdev_get_by_index+0x5e/0x80
[ 3293.426526][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3293.426526][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3293.426526][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3293.426526][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3293.426526][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3293.426526][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3293.426526][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3293.426526][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3293.426526][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3293.426526][   T72]      vfs_write+0x9e5/0x10a0
[ 3293.426526][   T72]      ksys_write+0xf5/0x1e0
[ 3293.426526][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.426526][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.426526][   T72] 
[ 3293.428329][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3293.428329][   T72]      netdev_get_by_index+0x5e/0x80
[ 3293.428329][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3293.428329][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3293.428329][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3293.428329][   T72]      ipv6_add_addr+0x411/0x2000
[ 3293.428329][   T72]      inet6_addr_add+0x30e/0xa40
[ 3293.428329][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3293.428329][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.428329][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.428329][   T72]      netlink_unicast+0x449/0x710
[ 3293.428329][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.428329][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.428329][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.428329][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.428329][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.428329][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.428329][   T72] 
[ 3293.430282][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3293.430282][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3293.430282][   T72]      ipv6_find_idev+0x102/0x170
[ 3293.430282][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3293.430282][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.430282][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.430282][   T72]      netlink_unicast+0x449/0x710
[ 3293.430282][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.430282][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.430282][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.430282][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.430282][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.430282][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.430282][   T72] 
[ 3293.431788][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3293.431788][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3293.431788][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3293.431788][   T72]      ipv6_find_idev+0x102/0x170
[ 3293.431788][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3293.431788][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3293.431788][   T72]      netlink_rcv_skb+0x130/0x360
[ 3293.431788][   T72]      netlink_unicast+0x449/0x710
[ 3293.431788][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3293.431788][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3293.431788][   T72]      ___sys_sendmsg+0xee/0x170
[ 3293.431788][   T72]      __sys_sendmsg+0xcd/0x170
[ 3293.431788][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.431788][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.431788][   T72] 
[ 3293.433438][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3293.433684][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3293.433684][   T72]      dst_init+0x84/0x4a0
[ 3293.433684][   T72]      dst_alloc+0x97/0x150
[ 3293.433684][   T72]      ip6_dst_alloc+0x23/0x90
[ 3293.433684][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3293.433684][   T72]      ip6_pol_route+0x56f/0x840
[ 3293.433684][   T72]      fib6_rule_lookup+0x227/0x600
[ 3293.433684][   T72]      ip6_route_output_flags+0x251/0x460
[ 3293.433684][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3293.433684][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3293.433684][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3293.433684][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3293.433684][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3293.433684][   T72]      __sys_connect+0x217/0x2a0
[ 3293.433684][   T72]      __x64_sys_connect+0x72/0xb0
[ 3293.433684][   T72]      do_syscall_64+0xc6/0x1e0
[ 3293.433684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3293.433684][   T72] 
[ 3303.676729][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3303.677109][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3303.677109][   T72]      netdev_get_by_index+0x5e/0x80
[ 3303.677109][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3303.677109][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3303.677109][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3303.677109][   T72]      ipv6_add_addr+0x411/0x2000
[ 3303.677109][   T72]      inet6_addr_add+0x30e/0xa40
[ 3303.677109][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3303.677109][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.677109][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.677109][   T72]      netlink_unicast+0x449/0x710
[ 3303.677109][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.677109][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.677109][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.677109][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.677109][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.677109][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.677109][   T72] 
[ 3303.679119][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3303.679119][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3303.679119][   T72]      ipv6_find_idev+0x102/0x170
[ 3303.679119][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3303.679119][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.679119][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.679119][   T72]      netlink_unicast+0x449/0x710
[ 3303.679119][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.679119][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.679119][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.679119][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.679119][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.679119][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.679119][   T72] 
[ 3303.680650][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3303.680650][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3303.680650][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3303.680650][   T72]      ipv6_find_idev+0x102/0x170
[ 3303.680650][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3303.680650][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.680650][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.680650][   T72]      netlink_unicast+0x449/0x710
[ 3303.680650][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.680650][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.680650][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.680650][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.680650][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.680650][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.680650][   T72] 
[ 3303.682333][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3303.682607][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3303.682607][   T72]      netdev_get_by_index+0x5e/0x80
[ 3303.682607][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3303.682607][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3303.682607][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3303.682607][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3303.682607][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3303.682607][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3303.682607][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3303.682607][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3303.682607][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3303.682607][   T72]      vfs_write+0x9e5/0x10a0
[ 3303.682607][   T72]      ksys_write+0xf5/0x1e0
[ 3303.682607][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.682607][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.682607][   T72] 
[ 3303.684446][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3303.684446][   T72]      netdev_get_by_index+0x5e/0x80
[ 3303.684446][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3303.684446][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3303.684446][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3303.684446][   T72]      ipv6_add_addr+0x411/0x2000
[ 3303.684446][   T72]      inet6_addr_add+0x30e/0xa40
[ 3303.684446][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3303.684446][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.684446][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.684446][   T72]      netlink_unicast+0x449/0x710
[ 3303.684446][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.684446][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.684446][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.684446][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.684446][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.684446][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.684446][   T72] 
[ 3303.686444][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3303.686444][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3303.686444][   T72]      ipv6_find_idev+0x102/0x170
[ 3303.686444][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3303.686444][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.686444][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.686444][   T72]      netlink_unicast+0x449/0x710
[ 3303.686444][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.686444][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.686444][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.686444][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.686444][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.686444][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.686444][   T72] 
[ 3303.687973][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3303.687973][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3303.687973][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3303.687973][   T72]      ipv6_find_idev+0x102/0x170
[ 3303.687973][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3303.687973][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3303.687973][   T72]      netlink_rcv_skb+0x130/0x360
[ 3303.687973][   T72]      netlink_unicast+0x449/0x710
[ 3303.687973][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3303.687973][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3303.687973][   T72]      ___sys_sendmsg+0xee/0x170
[ 3303.687973][   T72]      __sys_sendmsg+0xcd/0x170
[ 3303.687973][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.687973][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.687973][   T72] 
[ 3303.689660][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3303.689901][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3303.689901][   T72]      dst_init+0x84/0x4a0
[ 3303.689901][   T72]      dst_alloc+0x97/0x150
[ 3303.689901][   T72]      ip6_dst_alloc+0x23/0x90
[ 3303.689901][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3303.689901][   T72]      ip6_pol_route+0x56f/0x840
[ 3303.689901][   T72]      fib6_rule_lookup+0x227/0x600
[ 3303.689901][   T72]      ip6_route_output_flags+0x251/0x460
[ 3303.689901][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3303.689901][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3303.689901][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3303.689901][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3303.689901][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3303.689901][   T72]      __sys_connect+0x217/0x2a0
[ 3303.689901][   T72]      __x64_sys_connect+0x72/0xb0
[ 3303.689901][   T72]      do_syscall_64+0xc6/0x1e0
[ 3303.689901][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3303.689901][   T72] 
[ 3313.932642][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3313.933029][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3313.933029][   T72]      netdev_get_by_index+0x5e/0x80
[ 3313.933029][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3313.933029][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3313.933029][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3313.933029][   T72]      ipv6_add_addr+0x411/0x2000
[ 3313.933029][   T72]      inet6_addr_add+0x30e/0xa40
[ 3313.933029][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3313.933029][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.933029][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.933029][   T72]      netlink_unicast+0x449/0x710
[ 3313.933029][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.933029][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.933029][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.933029][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.933029][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.933029][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.933029][   T72] 
[ 3313.935068][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3313.935068][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3313.935068][   T72]      ipv6_find_idev+0x102/0x170
[ 3313.935068][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3313.935068][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.935068][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.935068][   T72]      netlink_unicast+0x449/0x710
[ 3313.935068][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.935068][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.935068][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.935068][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.935068][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.935068][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.935068][   T72] 
[ 3313.936611][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3313.936611][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3313.936611][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3313.936611][   T72]      ipv6_find_idev+0x102/0x170
[ 3313.936611][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3313.936611][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.936611][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.936611][   T72]      netlink_unicast+0x449/0x710
[ 3313.936611][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.936611][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.936611][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.936611][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.936611][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.936611][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.936611][   T72] 
[ 3313.938306][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3313.938581][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3313.938581][   T72]      netdev_get_by_index+0x5e/0x80
[ 3313.938581][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3313.938581][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3313.938581][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3313.938581][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3313.938581][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3313.938581][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3313.938581][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3313.938581][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3313.938581][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3313.938581][   T72]      vfs_write+0x9e5/0x10a0
[ 3313.938581][   T72]      ksys_write+0xf5/0x1e0
[ 3313.938581][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.938581][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.938581][   T72] 
[ 3313.940422][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3313.940422][   T72]      netdev_get_by_index+0x5e/0x80
[ 3313.940422][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3313.940422][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3313.940422][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3313.940422][   T72]      ipv6_add_addr+0x411/0x2000
[ 3313.940422][   T72]      inet6_addr_add+0x30e/0xa40
[ 3313.940422][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3313.940422][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.940422][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.940422][   T72]      netlink_unicast+0x449/0x710
[ 3313.940422][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.940422][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.940422][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.940422][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.940422][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.940422][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.940422][   T72] 
[ 3313.942417][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3313.942417][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3313.942417][   T72]      ipv6_find_idev+0x102/0x170
[ 3313.942417][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3313.942417][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.942417][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.942417][   T72]      netlink_unicast+0x449/0x710
[ 3313.942417][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.942417][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.942417][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.942417][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.942417][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.942417][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.942417][   T72] 
[ 3313.943953][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3313.943953][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3313.943953][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3313.943953][   T72]      ipv6_find_idev+0x102/0x170
[ 3313.943953][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3313.943953][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3313.943953][   T72]      netlink_rcv_skb+0x130/0x360
[ 3313.943953][   T72]      netlink_unicast+0x449/0x710
[ 3313.943953][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3313.943953][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3313.943953][   T72]      ___sys_sendmsg+0xee/0x170
[ 3313.943953][   T72]      __sys_sendmsg+0xcd/0x170
[ 3313.943953][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.943953][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.943953][   T72] 
[ 3313.945637][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3313.945878][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3313.945878][   T72]      dst_init+0x84/0x4a0
[ 3313.945878][   T72]      dst_alloc+0x97/0x150
[ 3313.945878][   T72]      ip6_dst_alloc+0x23/0x90
[ 3313.945878][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3313.945878][   T72]      ip6_pol_route+0x56f/0x840
[ 3313.945878][   T72]      fib6_rule_lookup+0x227/0x600
[ 3313.945878][   T72]      ip6_route_output_flags+0x251/0x460
[ 3313.945878][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3313.945878][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3313.945878][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3313.945878][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3313.945878][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3313.945878][   T72]      __sys_connect+0x217/0x2a0
[ 3313.945878][   T72]      __x64_sys_connect+0x72/0xb0
[ 3313.945878][   T72]      do_syscall_64+0xc6/0x1e0
[ 3313.945878][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3313.945878][   T72] 
[ 3324.036709][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3324.037080][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3324.037080][   T72]      netdev_get_by_index+0x5e/0x80
[ 3324.037080][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3324.037080][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3324.037080][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3324.037080][   T72]      ipv6_add_addr+0x411/0x2000
[ 3324.037080][   T72]      inet6_addr_add+0x30e/0xa40
[ 3324.037080][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3324.037080][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.037080][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.037080][   T72]      netlink_unicast+0x449/0x710
[ 3324.037080][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.037080][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.037080][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.037080][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.037080][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.037080][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.037080][   T72] 
[ 3324.039061][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3324.039061][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3324.039061][   T72]      ipv6_find_idev+0x102/0x170
[ 3324.039061][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3324.039061][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.039061][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.039061][   T72]      netlink_unicast+0x449/0x710
[ 3324.039061][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.039061][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.039061][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.039061][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.039061][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.039061][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.039061][   T72] 
[ 3324.040576][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3324.040576][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3324.040576][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3324.040576][   T72]      ipv6_find_idev+0x102/0x170
[ 3324.040576][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3324.040576][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.040576][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.040576][   T72]      netlink_unicast+0x449/0x710
[ 3324.040576][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.040576][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.040576][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.040576][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.040576][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.040576][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.040576][   T72] 
[ 3324.042225][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3324.042495][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3324.042495][   T72]      netdev_get_by_index+0x5e/0x80
[ 3324.042495][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3324.042495][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3324.042495][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3324.042495][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3324.042495][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3324.042495][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3324.042495][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3324.042495][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3324.042495][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3324.042495][   T72]      vfs_write+0x9e5/0x10a0
[ 3324.042495][   T72]      ksys_write+0xf5/0x1e0
[ 3324.042495][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.042495][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.042495][   T72] 
[ 3324.044318][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3324.044318][   T72]      netdev_get_by_index+0x5e/0x80
[ 3324.044318][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3324.044318][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3324.044318][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3324.044318][   T72]      ipv6_add_addr+0x411/0x2000
[ 3324.044318][   T72]      inet6_addr_add+0x30e/0xa40
[ 3324.044318][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3324.044318][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.044318][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.044318][   T72]      netlink_unicast+0x449/0x710
[ 3324.044318][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.044318][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.044318][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.044318][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.044318][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.044318][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.044318][   T72] 
[ 3324.046297][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3324.046297][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3324.046297][   T72]      ipv6_find_idev+0x102/0x170
[ 3324.046297][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3324.046297][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.046297][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.046297][   T72]      netlink_unicast+0x449/0x710
[ 3324.046297][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.046297][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.046297][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.046297][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.046297][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.046297][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.046297][   T72] 
[ 3324.047806][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3324.047806][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3324.047806][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3324.047806][   T72]      ipv6_find_idev+0x102/0x170
[ 3324.047806][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3324.047806][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3324.047806][   T72]      netlink_rcv_skb+0x130/0x360
[ 3324.047806][   T72]      netlink_unicast+0x449/0x710
[ 3324.047806][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3324.047806][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3324.047806][   T72]      ___sys_sendmsg+0xee/0x170
[ 3324.047806][   T72]      __sys_sendmsg+0xcd/0x170
[ 3324.047806][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.047806][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.047806][   T72] 
[ 3324.049457][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3324.049703][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3324.049703][   T72]      dst_init+0x84/0x4a0
[ 3324.049703][   T72]      dst_alloc+0x97/0x150
[ 3324.049703][   T72]      ip6_dst_alloc+0x23/0x90
[ 3324.049703][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3324.049703][   T72]      ip6_pol_route+0x56f/0x840
[ 3324.049703][   T72]      fib6_rule_lookup+0x227/0x600
[ 3324.049703][   T72]      ip6_route_output_flags+0x251/0x460
[ 3324.049703][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3324.049703][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3324.049703][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3324.049703][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3324.049703][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3324.049703][   T72]      __sys_connect+0x217/0x2a0
[ 3324.049703][   T72]      __x64_sys_connect+0x72/0xb0
[ 3324.049703][   T72]      do_syscall_64+0xc6/0x1e0
[ 3324.049703][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3324.049703][   T72] 
[ 3334.300721][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3334.301094][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3334.301094][   T72]      netdev_get_by_index+0x5e/0x80
[ 3334.301094][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3334.301094][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3334.301094][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3334.301094][   T72]      ipv6_add_addr+0x411/0x2000
[ 3334.301094][   T72]      inet6_addr_add+0x30e/0xa40
[ 3334.301094][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3334.301094][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.301094][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.301094][   T72]      netlink_unicast+0x449/0x710
[ 3334.301094][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.301094][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.301094][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.301094][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.301094][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.301094][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.301094][   T72] 
[ 3334.303066][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3334.303066][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3334.303066][   T72]      ipv6_find_idev+0x102/0x170
[ 3334.303066][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3334.303066][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.303066][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.303066][   T72]      netlink_unicast+0x449/0x710
[ 3334.303066][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.303066][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.303066][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.303066][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.303066][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.303066][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.303066][   T72] 
[ 3334.304593][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3334.304593][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3334.304593][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3334.304593][   T72]      ipv6_find_idev+0x102/0x170
[ 3334.304593][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3334.304593][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.304593][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.304593][   T72]      netlink_unicast+0x449/0x710
[ 3334.304593][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.304593][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.304593][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.304593][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.304593][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.304593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.304593][   T72] 
[ 3334.306261][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3334.306524][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3334.306524][   T72]      netdev_get_by_index+0x5e/0x80
[ 3334.306524][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3334.306524][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3334.306524][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3334.306524][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3334.306524][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3334.306524][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3334.306524][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3334.306524][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3334.306524][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3334.306524][   T72]      vfs_write+0x9e5/0x10a0
[ 3334.306524][   T72]      ksys_write+0xf5/0x1e0
[ 3334.306524][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.306524][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.306524][   T72] 
[ 3334.308341][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3334.308341][   T72]      netdev_get_by_index+0x5e/0x80
[ 3334.308341][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3334.308341][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3334.308341][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3334.308341][   T72]      ipv6_add_addr+0x411/0x2000
[ 3334.308341][   T72]      inet6_addr_add+0x30e/0xa40
[ 3334.308341][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3334.308341][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.308341][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.308341][   T72]      netlink_unicast+0x449/0x710
[ 3334.308341][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.308341][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.308341][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.308341][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.308341][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.308341][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.308341][   T72] 
[ 3334.310297][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3334.310297][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3334.310297][   T72]      ipv6_find_idev+0x102/0x170
[ 3334.310297][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3334.310297][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.310297][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.310297][   T72]      netlink_unicast+0x449/0x710
[ 3334.310297][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.310297][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.310297][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.310297][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.310297][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.310297][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.310297][   T72] 
[ 3334.311805][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3334.311805][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3334.311805][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3334.311805][   T72]      ipv6_find_idev+0x102/0x170
[ 3334.311805][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3334.311805][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3334.311805][   T72]      netlink_rcv_skb+0x130/0x360
[ 3334.311805][   T72]      netlink_unicast+0x449/0x710
[ 3334.311805][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3334.311805][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3334.311805][   T72]      ___sys_sendmsg+0xee/0x170
[ 3334.311805][   T72]      __sys_sendmsg+0xcd/0x170
[ 3334.311805][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.311805][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.311805][   T72] 
[ 3334.313458][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3334.313705][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3334.313705][   T72]      dst_init+0x84/0x4a0
[ 3334.313705][   T72]      dst_alloc+0x97/0x150
[ 3334.313705][   T72]      ip6_dst_alloc+0x23/0x90
[ 3334.313705][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3334.313705][   T72]      ip6_pol_route+0x56f/0x840
[ 3334.313705][   T72]      fib6_rule_lookup+0x227/0x600
[ 3334.313705][   T72]      ip6_route_output_flags+0x251/0x460
[ 3334.313705][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3334.313705][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3334.313705][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3334.313705][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3334.313705][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3334.313705][   T72]      __sys_connect+0x217/0x2a0
[ 3334.313705][   T72]      __x64_sys_connect+0x72/0xb0
[ 3334.313705][   T72]      do_syscall_64+0xc6/0x1e0
[ 3334.313705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3334.313705][   T72] 
[ 3344.316639][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3344.317021][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3344.317021][   T72]      netdev_get_by_index+0x5e/0x80
[ 3344.317021][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3344.317021][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3344.317021][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3344.317021][   T72]      ipv6_add_addr+0x411/0x2000
[ 3344.317021][   T72]      inet6_addr_add+0x30e/0xa40
[ 3344.317021][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3344.317021][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.317021][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.317021][   T72]      netlink_unicast+0x449/0x710
[ 3344.317021][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.317021][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.317021][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.317021][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.317021][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.317021][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.317021][   T72] 
[ 3344.318990][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3344.318990][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3344.318990][   T72]      ipv6_find_idev+0x102/0x170
[ 3344.318990][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3344.318990][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.318990][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.318990][   T72]      netlink_unicast+0x449/0x710
[ 3344.318990][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.318990][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.318990][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.318990][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.318990][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.318990][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.318990][   T72] 
[ 3344.320502][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3344.320502][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3344.320502][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3344.320502][   T72]      ipv6_find_idev+0x102/0x170
[ 3344.320502][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3344.320502][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.320502][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.320502][   T72]      netlink_unicast+0x449/0x710
[ 3344.320502][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.320502][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.320502][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.320502][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.320502][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.320502][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.320502][   T72] 
[ 3344.322158][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3344.322421][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3344.322421][   T72]      netdev_get_by_index+0x5e/0x80
[ 3344.322421][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3344.322421][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3344.322421][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3344.322421][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3344.322421][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3344.322421][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3344.322421][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3344.322421][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3344.322421][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3344.322421][   T72]      vfs_write+0x9e5/0x10a0
[ 3344.322421][   T72]      ksys_write+0xf5/0x1e0
[ 3344.322421][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.322421][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.322421][   T72] 
[ 3344.324238][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3344.324238][   T72]      netdev_get_by_index+0x5e/0x80
[ 3344.324238][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3344.324238][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3344.324238][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3344.324238][   T72]      ipv6_add_addr+0x411/0x2000
[ 3344.324238][   T72]      inet6_addr_add+0x30e/0xa40
[ 3344.324238][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3344.324238][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.324238][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.324238][   T72]      netlink_unicast+0x449/0x710
[ 3344.324238][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.324238][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.324238][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.324238][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.324238][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.324238][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.324238][   T72] 
[ 3344.326205][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3344.326205][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3344.326205][   T72]      ipv6_find_idev+0x102/0x170
[ 3344.326205][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3344.326205][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.326205][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.326205][   T72]      netlink_unicast+0x449/0x710
[ 3344.326205][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.326205][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.326205][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.326205][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.326205][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.326205][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.326205][   T72] 
[ 3344.327713][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3344.327713][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3344.327713][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3344.327713][   T72]      ipv6_find_idev+0x102/0x170
[ 3344.327713][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3344.327713][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3344.327713][   T72]      netlink_rcv_skb+0x130/0x360
[ 3344.327713][   T72]      netlink_unicast+0x449/0x710
[ 3344.327713][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3344.327713][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3344.327713][   T72]      ___sys_sendmsg+0xee/0x170
[ 3344.327713][   T72]      __sys_sendmsg+0xcd/0x170
[ 3344.327713][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.327713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.327713][   T72] 
[ 3344.329366][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3344.329612][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3344.329612][   T72]      dst_init+0x84/0x4a0
[ 3344.329612][   T72]      dst_alloc+0x97/0x150
[ 3344.329612][   T72]      ip6_dst_alloc+0x23/0x90
[ 3344.329612][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3344.329612][   T72]      ip6_pol_route+0x56f/0x840
[ 3344.329612][   T72]      fib6_rule_lookup+0x227/0x600
[ 3344.329612][   T72]      ip6_route_output_flags+0x251/0x460
[ 3344.329612][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3344.329612][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3344.329612][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3344.329612][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3344.329612][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3344.329612][   T72]      __sys_connect+0x217/0x2a0
[ 3344.329612][   T72]      __x64_sys_connect+0x72/0xb0
[ 3344.329612][   T72]      do_syscall_64+0xc6/0x1e0
[ 3344.329612][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3344.329612][   T72] 
[ 3354.572705][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3354.573081][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3354.573081][   T72]      netdev_get_by_index+0x5e/0x80
[ 3354.573081][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3354.573081][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3354.573081][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3354.573081][   T72]      ipv6_add_addr+0x411/0x2000
[ 3354.573081][   T72]      inet6_addr_add+0x30e/0xa40
[ 3354.573081][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3354.573081][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.573081][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.573081][   T72]      netlink_unicast+0x449/0x710
[ 3354.573081][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.573081][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.573081][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.573081][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.573081][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.573081][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.573081][   T72] 
[ 3354.575082][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3354.575082][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3354.575082][   T72]      ipv6_find_idev+0x102/0x170
[ 3354.575082][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3354.575082][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.575082][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.575082][   T72]      netlink_unicast+0x449/0x710
[ 3354.575082][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.575082][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.575082][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.575082][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.575082][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.575082][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.575082][   T72] 
[ 3354.576601][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3354.576601][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3354.576601][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3354.576601][   T72]      ipv6_find_idev+0x102/0x170
[ 3354.576601][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3354.576601][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.576601][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.576601][   T72]      netlink_unicast+0x449/0x710
[ 3354.576601][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.576601][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.576601][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.576601][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.576601][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.576601][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.576601][   T72] 
[ 3354.578264][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3354.578527][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3354.578527][   T72]      netdev_get_by_index+0x5e/0x80
[ 3354.578527][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3354.578527][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3354.578527][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3354.578527][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3354.578527][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3354.578527][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3354.578527][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3354.578527][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3354.578527][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3354.578527][   T72]      vfs_write+0x9e5/0x10a0
[ 3354.578527][   T72]      ksys_write+0xf5/0x1e0
[ 3354.578527][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.578527][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.578527][   T72] 
[ 3354.580358][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3354.580358][   T72]      netdev_get_by_index+0x5e/0x80
[ 3354.580358][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3354.580358][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3354.580358][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3354.580358][   T72]      ipv6_add_addr+0x411/0x2000
[ 3354.580358][   T72]      inet6_addr_add+0x30e/0xa40
[ 3354.580358][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3354.580358][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.580358][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.580358][   T72]      netlink_unicast+0x449/0x710
[ 3354.580358][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.580358][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.580358][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.580358][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.580358][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.580358][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.580358][   T72] 
[ 3354.582314][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3354.582314][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3354.582314][   T72]      ipv6_find_idev+0x102/0x170
[ 3354.582314][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3354.582314][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.582314][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.582314][   T72]      netlink_unicast+0x449/0x710
[ 3354.582314][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.582314][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.582314][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.582314][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.582314][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.582314][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.582314][   T72] 
[ 3354.583825][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3354.583825][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3354.583825][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3354.583825][   T72]      ipv6_find_idev+0x102/0x170
[ 3354.583825][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3354.583825][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3354.583825][   T72]      netlink_rcv_skb+0x130/0x360
[ 3354.583825][   T72]      netlink_unicast+0x449/0x710
[ 3354.583825][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3354.583825][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3354.583825][   T72]      ___sys_sendmsg+0xee/0x170
[ 3354.583825][   T72]      __sys_sendmsg+0xcd/0x170
[ 3354.583825][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.583825][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.583825][   T72] 
[ 3354.585501][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3354.585744][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3354.585744][   T72]      dst_init+0x84/0x4a0
[ 3354.585744][   T72]      dst_alloc+0x97/0x150
[ 3354.585744][   T72]      ip6_dst_alloc+0x23/0x90
[ 3354.585744][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3354.585744][   T72]      ip6_pol_route+0x56f/0x840
[ 3354.585744][   T72]      fib6_rule_lookup+0x227/0x600
[ 3354.585744][   T72]      ip6_route_output_flags+0x251/0x460
[ 3354.585744][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3354.585744][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3354.585744][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3354.585744][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3354.585744][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3354.585744][   T72]      __sys_connect+0x217/0x2a0
[ 3354.585744][   T72]      __x64_sys_connect+0x72/0xb0
[ 3354.585744][   T72]      do_syscall_64+0xc6/0x1e0
[ 3354.585744][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3354.585744][   T72] 
[ 3364.828701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3364.829135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3364.829135][   T72]      netdev_get_by_index+0x5e/0x80
[ 3364.829135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3364.829135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3364.829135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3364.829135][   T72]      ipv6_add_addr+0x411/0x2000
[ 3364.829135][   T72]      inet6_addr_add+0x30e/0xa40
[ 3364.829135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3364.829135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.829135][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.829135][   T72]      netlink_unicast+0x449/0x710
[ 3364.829135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.829135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.829135][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.829135][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.829135][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.829135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.829135][   T72] 
[ 3364.831111][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3364.831111][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3364.831111][   T72]      ipv6_find_idev+0x102/0x170
[ 3364.831111][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3364.831111][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.831111][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.831111][   T72]      netlink_unicast+0x449/0x710
[ 3364.831111][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.831111][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.831111][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.831111][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.831111][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.831111][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.831111][   T72] 
[ 3364.832630][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3364.832630][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3364.832630][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3364.832630][   T72]      ipv6_find_idev+0x102/0x170
[ 3364.832630][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3364.832630][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.832630][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.832630][   T72]      netlink_unicast+0x449/0x710
[ 3364.832630][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.832630][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.832630][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.832630][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.832630][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.832630][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.832630][   T72] 
[ 3364.834299][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3364.834575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3364.834575][   T72]      netdev_get_by_index+0x5e/0x80
[ 3364.834575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3364.834575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3364.834575][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3364.834575][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3364.834575][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3364.834575][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3364.834575][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3364.834575][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3364.834575][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3364.834575][   T72]      vfs_write+0x9e5/0x10a0
[ 3364.834575][   T72]      ksys_write+0xf5/0x1e0
[ 3364.834575][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.834575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.834575][   T72] 
[ 3364.836403][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3364.836403][   T72]      netdev_get_by_index+0x5e/0x80
[ 3364.836403][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3364.836403][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3364.836403][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3364.836403][   T72]      ipv6_add_addr+0x411/0x2000
[ 3364.836403][   T72]      inet6_addr_add+0x30e/0xa40
[ 3364.836403][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3364.836403][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.836403][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.836403][   T72]      netlink_unicast+0x449/0x710
[ 3364.836403][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.836403][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.836403][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.836403][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.836403][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.836403][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.836403][   T72] 
[ 3364.838373][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3364.838373][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3364.838373][   T72]      ipv6_find_idev+0x102/0x170
[ 3364.838373][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3364.838373][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.838373][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.838373][   T72]      netlink_unicast+0x449/0x710
[ 3364.838373][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.838373][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.838373][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.838373][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.838373][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.838373][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.838373][   T72] 
[ 3364.839887][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3364.839887][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3364.839887][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3364.839887][   T72]      ipv6_find_idev+0x102/0x170
[ 3364.839887][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3364.839887][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3364.839887][   T72]      netlink_rcv_skb+0x130/0x360
[ 3364.839887][   T72]      netlink_unicast+0x449/0x710
[ 3364.839887][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3364.839887][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3364.839887][   T72]      ___sys_sendmsg+0xee/0x170
[ 3364.839887][   T72]      __sys_sendmsg+0xcd/0x170
[ 3364.839887][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.839887][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.839887][   T72] 
[ 3364.841545][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3364.841790][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3364.841790][   T72]      dst_init+0x84/0x4a0
[ 3364.841790][   T72]      dst_alloc+0x97/0x150
[ 3364.841790][   T72]      ip6_dst_alloc+0x23/0x90
[ 3364.841790][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3364.841790][   T72]      ip6_pol_route+0x56f/0x840
[ 3364.841790][   T72]      fib6_rule_lookup+0x227/0x600
[ 3364.841790][   T72]      ip6_route_output_flags+0x251/0x460
[ 3364.841790][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3364.841790][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3364.841790][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3364.841790][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3364.841790][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3364.841790][   T72]      __sys_connect+0x217/0x2a0
[ 3364.841790][   T72]      __x64_sys_connect+0x72/0xb0
[ 3364.841790][   T72]      do_syscall_64+0xc6/0x1e0
[ 3364.841790][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3364.841790][   T72] 
[ 3375.084701][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3375.085131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3375.085131][   T72]      netdev_get_by_index+0x5e/0x80
[ 3375.085131][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3375.085131][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3375.085131][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3375.085131][   T72]      ipv6_add_addr+0x411/0x2000
[ 3375.085131][   T72]      inet6_addr_add+0x30e/0xa40
[ 3375.085131][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3375.085131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.085131][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.085131][   T72]      netlink_unicast+0x449/0x710
[ 3375.085131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.085131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.085131][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.085131][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.085131][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.085131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.085131][   T72] 
[ 3375.087105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3375.087105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3375.087105][   T72]      ipv6_find_idev+0x102/0x170
[ 3375.087105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3375.087105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.087105][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.087105][   T72]      netlink_unicast+0x449/0x710
[ 3375.087105][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.087105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.087105][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.087105][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.087105][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.087105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.087105][   T72] 
[ 3375.088621][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3375.088621][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3375.088621][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3375.088621][   T72]      ipv6_find_idev+0x102/0x170
[ 3375.088621][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3375.088621][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.088621][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.088621][   T72]      netlink_unicast+0x449/0x710
[ 3375.088621][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.088621][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.088621][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.088621][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.088621][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.088621][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.088621][   T72] 
[ 3375.090277][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3375.090551][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3375.090551][   T72]      netdev_get_by_index+0x5e/0x80
[ 3375.090551][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3375.090551][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3375.090551][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3375.090551][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3375.090551][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3375.090551][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3375.090551][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3375.090551][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3375.090551][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3375.090551][   T72]      vfs_write+0x9e5/0x10a0
[ 3375.090551][   T72]      ksys_write+0xf5/0x1e0
[ 3375.090551][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.090551][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.090551][   T72] 
[ 3375.092367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3375.092367][   T72]      netdev_get_by_index+0x5e/0x80
[ 3375.092367][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3375.092367][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3375.092367][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3375.092367][   T72]      ipv6_add_addr+0x411/0x2000
[ 3375.092367][   T72]      inet6_addr_add+0x30e/0xa40
[ 3375.092367][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3375.092367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.092367][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.092367][   T72]      netlink_unicast+0x449/0x710
[ 3375.092367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.092367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.092367][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.092367][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.092367][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.092367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.092367][   T72] 
[ 3375.094321][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3375.094321][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3375.094321][   T72]      ipv6_find_idev+0x102/0x170
[ 3375.094321][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3375.094321][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.094321][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.094321][   T72]      netlink_unicast+0x449/0x710
[ 3375.094321][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.094321][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.094321][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.094321][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.094321][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.094321][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.094321][   T72] 
[ 3375.095834][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3375.095834][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3375.095834][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3375.095834][   T72]      ipv6_find_idev+0x102/0x170
[ 3375.095834][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3375.095834][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3375.095834][   T72]      netlink_rcv_skb+0x130/0x360
[ 3375.095834][   T72]      netlink_unicast+0x449/0x710
[ 3375.095834][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3375.095834][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3375.095834][   T72]      ___sys_sendmsg+0xee/0x170
[ 3375.095834][   T72]      __sys_sendmsg+0xcd/0x170
[ 3375.095834][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.095834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.095834][   T72] 
[ 3375.097488][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3375.097737][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3375.097737][   T72]      dst_init+0x84/0x4a0
[ 3375.097737][   T72]      dst_alloc+0x97/0x150
[ 3375.097737][   T72]      ip6_dst_alloc+0x23/0x90
[ 3375.097737][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3375.097737][   T72]      ip6_pol_route+0x56f/0x840
[ 3375.097737][   T72]      fib6_rule_lookup+0x227/0x600
[ 3375.097737][   T72]      ip6_route_output_flags+0x251/0x460
[ 3375.097737][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3375.097737][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3375.097737][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3375.097737][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3375.097737][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3375.097737][   T72]      __sys_connect+0x217/0x2a0
[ 3375.097737][   T72]      __x64_sys_connect+0x72/0xb0
[ 3375.097737][   T72]      do_syscall_64+0xc6/0x1e0
[ 3375.097737][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3375.097737][   T72] 
[ 3385.340707][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3385.341173][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3385.341173][   T72]      netdev_get_by_index+0x5e/0x80
[ 3385.341173][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3385.341173][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3385.341173][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3385.341173][   T72]      ipv6_add_addr+0x411/0x2000
[ 3385.341173][   T72]      inet6_addr_add+0x30e/0xa40
[ 3385.341173][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3385.341173][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.341173][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.341173][   T72]      netlink_unicast+0x449/0x710
[ 3385.341173][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.341173][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.341173][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.341173][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.341173][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.341173][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.341173][   T72] 
[ 3385.343148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3385.343148][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3385.343148][   T72]      ipv6_find_idev+0x102/0x170
[ 3385.343148][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3385.343148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.343148][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.343148][   T72]      netlink_unicast+0x449/0x710
[ 3385.343148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.343148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.343148][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.343148][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.343148][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.343148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.343148][   T72] 
[ 3385.344675][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3385.344675][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3385.344675][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3385.344675][   T72]      ipv6_find_idev+0x102/0x170
[ 3385.344675][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3385.344675][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.344675][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.344675][   T72]      netlink_unicast+0x449/0x710
[ 3385.344675][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.344675][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.344675][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.344675][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.344675][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.344675][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.344675][   T72] 
[ 3385.346328][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3385.346599][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3385.346599][   T72]      netdev_get_by_index+0x5e/0x80
[ 3385.346599][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3385.346599][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3385.346599][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3385.346599][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3385.346599][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3385.346599][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3385.346599][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3385.346599][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3385.346599][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3385.346599][   T72]      vfs_write+0x9e5/0x10a0
[ 3385.346599][   T72]      ksys_write+0xf5/0x1e0
[ 3385.346599][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.346599][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.346599][   T72] 
[ 3385.348409][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3385.348409][   T72]      netdev_get_by_index+0x5e/0x80
[ 3385.348409][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3385.348409][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3385.348409][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3385.348409][   T72]      ipv6_add_addr+0x411/0x2000
[ 3385.348409][   T72]      inet6_addr_add+0x30e/0xa40
[ 3385.348409][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3385.348409][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.348409][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.348409][   T72]      netlink_unicast+0x449/0x710
[ 3385.348409][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.348409][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.348409][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.348409][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.348409][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.348409][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.348409][   T72] 
[ 3385.350720][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3385.350720][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3385.350720][   T72]      ipv6_find_idev+0x102/0x170
[ 3385.350720][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3385.350720][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.350720][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.350720][   T72]      netlink_unicast+0x449/0x710
[ 3385.350720][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.350720][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.350720][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.350720][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.350720][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.350720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.350720][   T72] 
[ 3385.353266][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3385.353266][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3385.353266][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3385.353266][   T72]      ipv6_find_idev+0x102/0x170
[ 3385.353266][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3385.353266][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3385.353266][   T72]      netlink_rcv_skb+0x130/0x360
[ 3385.353266][   T72]      netlink_unicast+0x449/0x710
[ 3385.353266][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3385.353266][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3385.353266][   T72]      ___sys_sendmsg+0xee/0x170
[ 3385.353266][   T72]      __sys_sendmsg+0xcd/0x170
[ 3385.353266][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.353266][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.353266][   T72] 
[ 3385.356030][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3385.356437][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3385.356437][   T72]      dst_init+0x84/0x4a0
[ 3385.356437][   T72]      dst_alloc+0x97/0x150
[ 3385.356437][   T72]      ip6_dst_alloc+0x23/0x90
[ 3385.356437][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3385.356437][   T72]      ip6_pol_route+0x56f/0x840
[ 3385.356437][   T72]      fib6_rule_lookup+0x227/0x600
[ 3385.356437][   T72]      ip6_route_output_flags+0x251/0x460
[ 3385.356437][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3385.356437][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3385.356437][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3385.356437][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3385.356437][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3385.356437][   T72]      __sys_connect+0x217/0x2a0
[ 3385.356437][   T72]      __x64_sys_connect+0x72/0xb0
[ 3385.356437][   T72]      do_syscall_64+0xc6/0x1e0
[ 3385.356437][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3385.356437][   T72] 
[ 3395.596697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3395.597132][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3395.597132][   T72]      netdev_get_by_index+0x5e/0x80
[ 3395.597132][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3395.597132][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3395.597132][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3395.597132][   T72]      ipv6_add_addr+0x411/0x2000
[ 3395.597132][   T72]      inet6_addr_add+0x30e/0xa40
[ 3395.597132][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3395.597132][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.597132][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.597132][   T72]      netlink_unicast+0x449/0x710
[ 3395.597132][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.597132][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.597132][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.597132][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.597132][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.597132][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.597132][   T72] 
[ 3395.599100][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3395.599100][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3395.599100][   T72]      ipv6_find_idev+0x102/0x170
[ 3395.599100][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3395.599100][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.599100][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.599100][   T72]      netlink_unicast+0x449/0x710
[ 3395.599100][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.599100][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.599100][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.599100][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.599100][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.599100][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.599100][   T72] 
[ 3395.600620][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3395.600620][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3395.600620][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3395.600620][   T72]      ipv6_find_idev+0x102/0x170
[ 3395.600620][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3395.600620][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.600620][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.600620][   T72]      netlink_unicast+0x449/0x710
[ 3395.600620][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.600620][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.600620][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.600620][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.600620][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.600620][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.600620][   T72] 
[ 3395.602277][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3395.602542][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3395.602542][   T72]      netdev_get_by_index+0x5e/0x80
[ 3395.602542][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3395.602542][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3395.602542][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3395.602542][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3395.602542][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3395.602542][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3395.602542][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3395.602542][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3395.602542][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3395.602542][   T72]      vfs_write+0x9e5/0x10a0
[ 3395.602542][   T72]      ksys_write+0xf5/0x1e0
[ 3395.602542][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.602542][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.602542][   T72] 
[ 3395.604380][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3395.604380][   T72]      netdev_get_by_index+0x5e/0x80
[ 3395.604380][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3395.604380][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3395.604380][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3395.604380][   T72]      ipv6_add_addr+0x411/0x2000
[ 3395.604380][   T72]      inet6_addr_add+0x30e/0xa40
[ 3395.604380][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3395.604380][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.604380][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.604380][   T72]      netlink_unicast+0x449/0x710
[ 3395.604380][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.604380][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.604380][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.604380][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.604380][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.604380][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.604380][   T72] 
[ 3395.606348][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3395.606348][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3395.606348][   T72]      ipv6_find_idev+0x102/0x170
[ 3395.606348][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3395.606348][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.606348][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.606348][   T72]      netlink_unicast+0x449/0x710
[ 3395.606348][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.606348][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.606348][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.606348][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.606348][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.606348][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.606348][   T72] 
[ 3395.608882][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3395.608882][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3395.608882][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3395.608882][   T72]      ipv6_find_idev+0x102/0x170
[ 3395.608882][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3395.608882][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3395.608882][   T72]      netlink_rcv_skb+0x130/0x360
[ 3395.608882][   T72]      netlink_unicast+0x449/0x710
[ 3395.608882][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3395.608882][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3395.608882][   T72]      ___sys_sendmsg+0xee/0x170
[ 3395.608882][   T72]      __sys_sendmsg+0xcd/0x170
[ 3395.608882][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.608882][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.608882][   T72] 
[ 3395.611664][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3395.612082][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3395.612082][   T72]      dst_init+0x84/0x4a0
[ 3395.612082][   T72]      dst_alloc+0x97/0x150
[ 3395.612082][   T72]      ip6_dst_alloc+0x23/0x90
[ 3395.612082][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3395.612082][   T72]      ip6_pol_route+0x56f/0x840
[ 3395.612082][   T72]      fib6_rule_lookup+0x227/0x600
[ 3395.612082][   T72]      ip6_route_output_flags+0x251/0x460
[ 3395.612082][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3395.612082][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3395.612082][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3395.612082][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3395.612082][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3395.612082][   T72]      __sys_connect+0x217/0x2a0
[ 3395.612082][   T72]      __x64_sys_connect+0x72/0xb0
[ 3395.612082][   T72]      do_syscall_64+0xc6/0x1e0
[ 3395.612082][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3395.612082][   T72] 
[ 3405.636703][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3405.637127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3405.637127][   T72]      netdev_get_by_index+0x5e/0x80
[ 3405.637127][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3405.637127][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3405.637127][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3405.637127][   T72]      ipv6_add_addr+0x411/0x2000
[ 3405.637127][   T72]      inet6_addr_add+0x30e/0xa40
[ 3405.637127][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3405.637127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.637127][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.637127][   T72]      netlink_unicast+0x449/0x710
[ 3405.637127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.637127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.637127][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.637127][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.637127][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.637127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.637127][   T72] 
[ 3405.639105][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3405.639105][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3405.639105][   T72]      ipv6_find_idev+0x102/0x170
[ 3405.639105][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3405.639105][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.639105][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.639105][   T72]      netlink_unicast+0x449/0x710
[ 3405.639105][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.639105][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.639105][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.639105][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.639105][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.639105][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.639105][   T72] 
[ 3405.640623][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3405.640623][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3405.640623][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3405.640623][   T72]      ipv6_find_idev+0x102/0x170
[ 3405.640623][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3405.640623][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.640623][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.640623][   T72]      netlink_unicast+0x449/0x710
[ 3405.640623][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.640623][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.640623][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.640623][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.640623][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.640623][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.640623][   T72] 
[ 3405.642282][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3405.642552][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3405.642552][   T72]      netdev_get_by_index+0x5e/0x80
[ 3405.642552][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3405.642552][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3405.642552][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3405.642552][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3405.642552][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3405.642552][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3405.642552][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3405.642552][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3405.642552][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3405.642552][   T72]      vfs_write+0x9e5/0x10a0
[ 3405.642552][   T72]      ksys_write+0xf5/0x1e0
[ 3405.642552][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.642552][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.642552][   T72] 
[ 3405.644391][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3405.644391][   T72]      netdev_get_by_index+0x5e/0x80
[ 3405.644391][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3405.644391][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3405.644391][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3405.644391][   T72]      ipv6_add_addr+0x411/0x2000
[ 3405.644391][   T72]      inet6_addr_add+0x30e/0xa40
[ 3405.644391][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3405.644391][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.644391][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.644391][   T72]      netlink_unicast+0x449/0x710
[ 3405.644391][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.644391][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.644391][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.644391][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.644391][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.644391][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.644391][   T72] 
[ 3405.646338][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3405.646338][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3405.646338][   T72]      ipv6_find_idev+0x102/0x170
[ 3405.646338][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3405.646338][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.646338][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.646338][   T72]      netlink_unicast+0x449/0x710
[ 3405.646338][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.646338][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.646338][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.646338][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.646338][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.646338][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.646338][   T72] 
[ 3405.647840][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3405.647840][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3405.647840][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3405.647840][   T72]      ipv6_find_idev+0x102/0x170
[ 3405.647840][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3405.647840][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3405.647840][   T72]      netlink_rcv_skb+0x130/0x360
[ 3405.647840][   T72]      netlink_unicast+0x449/0x710
[ 3405.647840][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3405.647840][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3405.647840][   T72]      ___sys_sendmsg+0xee/0x170
[ 3405.647840][   T72]      __sys_sendmsg+0xcd/0x170
[ 3405.647840][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.647840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.647840][   T72] 
[ 3405.653409][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3405.653858][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3405.653858][   T72]      dst_init+0x84/0x4a0
[ 3405.653858][   T72]      dst_alloc+0x97/0x150
[ 3405.653858][   T72]      ip6_dst_alloc+0x23/0x90
[ 3405.653858][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3405.653858][   T72]      ip6_pol_route+0x56f/0x840
[ 3405.653858][   T72]      fib6_rule_lookup+0x227/0x600
[ 3405.653858][   T72]      ip6_route_output_flags+0x251/0x460
[ 3405.653858][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3405.653858][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3405.653858][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3405.653858][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3405.653858][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3405.653858][   T72]      __sys_connect+0x217/0x2a0
[ 3405.653858][   T72]      __x64_sys_connect+0x72/0xb0
[ 3405.653858][   T72]      do_syscall_64+0xc6/0x1e0
[ 3405.653858][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3405.653858][   T72] 
[ 3415.708714][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3415.709085][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3415.709085][   T72]      netdev_get_by_index+0x5e/0x80
[ 3415.709085][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3415.709085][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3415.709085][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3415.709085][   T72]      ipv6_add_addr+0x411/0x2000
[ 3415.709085][   T72]      inet6_addr_add+0x30e/0xa40
[ 3415.709085][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3415.709085][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.709085][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.709085][   T72]      netlink_unicast+0x449/0x710
[ 3415.709085][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.709085][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.709085][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.709085][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.709085][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.709085][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.709085][   T72] 
[ 3415.711053][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3415.711053][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3415.711053][   T72]      ipv6_find_idev+0x102/0x170
[ 3415.711053][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3415.711053][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.711053][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.711053][   T72]      netlink_unicast+0x449/0x710
[ 3415.711053][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.711053][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.711053][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.711053][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.711053][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.711053][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.711053][   T72] 
[ 3415.712577][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3415.712577][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3415.712577][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3415.712577][   T72]      ipv6_find_idev+0x102/0x170
[ 3415.712577][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3415.712577][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.712577][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.712577][   T72]      netlink_unicast+0x449/0x710
[ 3415.712577][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.712577][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.712577][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.712577][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.712577][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.712577][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.712577][   T72] 
[ 3415.714242][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3415.714514][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3415.714514][   T72]      netdev_get_by_index+0x5e/0x80
[ 3415.714514][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3415.714514][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3415.714514][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3415.714514][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3415.714514][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3415.714514][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3415.714514][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3415.714514][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3415.714514][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3415.714514][   T72]      vfs_write+0x9e5/0x10a0
[ 3415.714514][   T72]      ksys_write+0xf5/0x1e0
[ 3415.714514][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.714514][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.714514][   T72] 
[ 3415.716323][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3415.716323][   T72]      netdev_get_by_index+0x5e/0x80
[ 3415.716323][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3415.716323][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3415.716323][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3415.716323][   T72]      ipv6_add_addr+0x411/0x2000
[ 3415.716323][   T72]      inet6_addr_add+0x30e/0xa40
[ 3415.716323][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3415.716323][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.716323][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.716323][   T72]      netlink_unicast+0x449/0x710
[ 3415.716323][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.716323][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.716323][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.716323][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.716323][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.716323][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.716323][   T72] 
[ 3415.718278][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3415.718278][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3415.718278][   T72]      ipv6_find_idev+0x102/0x170
[ 3415.718278][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3415.718278][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.718278][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.718278][   T72]      netlink_unicast+0x449/0x710
[ 3415.718278][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.718278][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.718278][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.718278][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.718278][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.718278][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.718278][   T72] 
[ 3415.719789][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3415.719789][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3415.719789][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3415.719789][   T72]      ipv6_find_idev+0x102/0x170
[ 3415.719789][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3415.719789][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3415.719789][   T72]      netlink_rcv_skb+0x130/0x360
[ 3415.719789][   T72]      netlink_unicast+0x449/0x710
[ 3415.719789][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3415.719789][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3415.719789][   T72]      ___sys_sendmsg+0xee/0x170
[ 3415.719789][   T72]      __sys_sendmsg+0xcd/0x170
[ 3415.719789][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.719789][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.719789][   T72] 
[ 3415.721954][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3415.722200][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3415.722200][   T72]      dst_init+0x84/0x4a0
[ 3415.722200][   T72]      dst_alloc+0x97/0x150
[ 3415.722200][   T72]      ip6_dst_alloc+0x23/0x90
[ 3415.722200][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3415.722200][   T72]      ip6_pol_route+0x56f/0x840
[ 3415.722200][   T72]      fib6_rule_lookup+0x227/0x600
[ 3415.722200][   T72]      ip6_route_output_flags+0x251/0x460
[ 3415.722200][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3415.722200][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3415.722200][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3415.722200][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3415.722200][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3415.722200][   T72]      __sys_connect+0x217/0x2a0
[ 3415.722200][   T72]      __x64_sys_connect+0x72/0xb0
[ 3415.722200][   T72]      do_syscall_64+0xc6/0x1e0
[ 3415.722200][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3415.722200][   T72] 
[ 3425.980702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3425.981129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3425.981129][   T72]      netdev_get_by_index+0x5e/0x80
[ 3425.981129][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3425.981129][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3425.981129][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3425.981129][   T72]      ipv6_add_addr+0x411/0x2000
[ 3425.981129][   T72]      inet6_addr_add+0x30e/0xa40
[ 3425.981129][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3425.981129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.981129][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.981129][   T72]      netlink_unicast+0x449/0x710
[ 3425.981129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.981129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.981129][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.981129][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.981129][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.981129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.981129][   T72] 
[ 3425.983113][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3425.983113][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3425.983113][   T72]      ipv6_find_idev+0x102/0x170
[ 3425.983113][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3425.983113][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.983113][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.983113][   T72]      netlink_unicast+0x449/0x710
[ 3425.983113][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.983113][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.983113][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.983113][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.983113][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.983113][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.983113][   T72] 
[ 3425.984638][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3425.984638][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3425.984638][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3425.984638][   T72]      ipv6_find_idev+0x102/0x170
[ 3425.984638][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3425.984638][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.984638][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.984638][   T72]      netlink_unicast+0x449/0x710
[ 3425.984638][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.984638][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.984638][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.984638][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.984638][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.984638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.984638][   T72] 
[ 3425.986294][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3425.986566][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3425.986566][   T72]      netdev_get_by_index+0x5e/0x80
[ 3425.986566][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3425.986566][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3425.986566][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3425.986566][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3425.986566][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3425.986566][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3425.986566][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3425.986566][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3425.986566][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3425.986566][   T72]      vfs_write+0x9e5/0x10a0
[ 3425.986566][   T72]      ksys_write+0xf5/0x1e0
[ 3425.986566][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.986566][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.986566][   T72] 
[ 3425.988385][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3425.988385][   T72]      netdev_get_by_index+0x5e/0x80
[ 3425.988385][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3425.988385][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3425.988385][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3425.988385][   T72]      ipv6_add_addr+0x411/0x2000
[ 3425.988385][   T72]      inet6_addr_add+0x30e/0xa40
[ 3425.988385][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3425.988385][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.988385][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.988385][   T72]      netlink_unicast+0x449/0x710
[ 3425.988385][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.988385][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.988385][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.988385][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.988385][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.988385][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.988385][   T72] 
[ 3425.990343][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3425.990343][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3425.990343][   T72]      ipv6_find_idev+0x102/0x170
[ 3425.990343][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3425.990343][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.990343][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.990343][   T72]      netlink_unicast+0x449/0x710
[ 3425.990343][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.990343][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.990343][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.990343][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.990343][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.990343][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.990343][   T72] 
[ 3425.991939][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3425.991939][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3425.991939][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3425.991939][   T72]      ipv6_find_idev+0x102/0x170
[ 3425.991939][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3425.991939][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3425.991939][   T72]      netlink_rcv_skb+0x130/0x360
[ 3425.991939][   T72]      netlink_unicast+0x449/0x710
[ 3425.991939][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3425.991939][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3425.991939][   T72]      ___sys_sendmsg+0xee/0x170
[ 3425.991939][   T72]      __sys_sendmsg+0xcd/0x170
[ 3425.991939][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.991939][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.991939][   T72] 
[ 3425.993578][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3425.993834][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3425.993834][   T72]      dst_init+0x84/0x4a0
[ 3425.993834][   T72]      dst_alloc+0x97/0x150
[ 3425.993834][   T72]      ip6_dst_alloc+0x23/0x90
[ 3425.993834][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3425.993834][   T72]      ip6_pol_route+0x56f/0x840
[ 3425.993834][   T72]      fib6_rule_lookup+0x227/0x600
[ 3425.993834][   T72]      ip6_route_output_flags+0x251/0x460
[ 3425.993834][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3425.993834][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3425.993834][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3425.993834][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3425.993834][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3425.993834][   T72]      __sys_connect+0x217/0x2a0
[ 3425.993834][   T72]      __x64_sys_connect+0x72/0xb0
[ 3425.993834][   T72]      do_syscall_64+0xc6/0x1e0
[ 3425.993834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3425.993834][   T72] 
[ 3436.212702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3436.213131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3436.213131][   T72]      netdev_get_by_index+0x5e/0x80
[ 3436.213131][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3436.213131][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3436.213131][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3436.213131][   T72]      ipv6_add_addr+0x411/0x2000
[ 3436.213131][   T72]      inet6_addr_add+0x30e/0xa40
[ 3436.213131][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3436.213131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.213131][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.213131][   T72]      netlink_unicast+0x449/0x710
[ 3436.213131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.213131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.213131][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.213131][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.213131][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.213131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.213131][   T72] 
[ 3436.217220][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3436.217220][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3436.217220][   T72]      ipv6_find_idev+0x102/0x170
[ 3436.217220][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3436.217220][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.217220][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.217220][   T72]      netlink_unicast+0x449/0x710
[ 3436.217220][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.217220][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.217220][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.217220][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.217220][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.217220][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.217220][   T72] 
[ 3436.220131][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3436.220131][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3436.220131][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3436.220131][   T72]      ipv6_find_idev+0x102/0x170
[ 3436.220131][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3436.220131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.220131][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.220131][   T72]      netlink_unicast+0x449/0x710
[ 3436.220131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.220131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.220131][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.220131][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.220131][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.220131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.220131][   T72] 
[ 3436.221807][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3436.222072][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3436.222072][   T72]      netdev_get_by_index+0x5e/0x80
[ 3436.222072][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3436.222072][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3436.222072][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3436.222072][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3436.222072][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3436.222072][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3436.222072][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3436.222072][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3436.222072][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3436.222072][   T72]      vfs_write+0x9e5/0x10a0
[ 3436.222072][   T72]      ksys_write+0xf5/0x1e0
[ 3436.222072][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.222072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.222072][   T72] 
[ 3436.223907][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3436.223907][   T72]      netdev_get_by_index+0x5e/0x80
[ 3436.223907][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3436.223907][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3436.223907][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3436.223907][   T72]      ipv6_add_addr+0x411/0x2000
[ 3436.223907][   T72]      inet6_addr_add+0x30e/0xa40
[ 3436.223907][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3436.223907][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.223907][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.223907][   T72]      netlink_unicast+0x449/0x710
[ 3436.223907][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.223907][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.223907][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.223907][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.223907][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.223907][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.223907][   T72] 
[ 3436.225901][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3436.225901][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3436.225901][   T72]      ipv6_find_idev+0x102/0x170
[ 3436.225901][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3436.225901][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.225901][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.225901][   T72]      netlink_unicast+0x449/0x710
[ 3436.225901][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.225901][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.225901][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.225901][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.225901][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.225901][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.225901][   T72] 
[ 3436.227425][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3436.227425][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3436.227425][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3436.227425][   T72]      ipv6_find_idev+0x102/0x170
[ 3436.227425][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3436.227425][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3436.227425][   T72]      netlink_rcv_skb+0x130/0x360
[ 3436.227425][   T72]      netlink_unicast+0x449/0x710
[ 3436.227425][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3436.227425][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3436.227425][   T72]      ___sys_sendmsg+0xee/0x170
[ 3436.227425][   T72]      __sys_sendmsg+0xcd/0x170
[ 3436.227425][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.227425][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.227425][   T72] 
[ 3436.229092][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3436.229335][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3436.229335][   T72]      dst_init+0x84/0x4a0
[ 3436.229335][   T72]      dst_alloc+0x97/0x150
[ 3436.229335][   T72]      ip6_dst_alloc+0x23/0x90
[ 3436.229335][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3436.229335][   T72]      ip6_pol_route+0x56f/0x840
[ 3436.229335][   T72]      fib6_rule_lookup+0x227/0x600
[ 3436.229335][   T72]      ip6_route_output_flags+0x251/0x460
[ 3436.229335][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3436.229335][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3436.229335][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3436.229335][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3436.229335][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3436.229335][   T72]      __sys_connect+0x217/0x2a0
[ 3436.229335][   T72]      __x64_sys_connect+0x72/0xb0
[ 3436.229335][   T72]      do_syscall_64+0xc6/0x1e0
[ 3436.229335][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3436.229335][   T72] 
[ 3446.468788][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3446.469240][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3446.469240][   T72]      netdev_get_by_index+0x5e/0x80
[ 3446.469240][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3446.469240][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3446.469240][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3446.469240][   T72]      ipv6_add_addr+0x411/0x2000
[ 3446.469240][   T72]      inet6_addr_add+0x30e/0xa40
[ 3446.469240][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3446.469240][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.469240][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.469240][   T72]      netlink_unicast+0x449/0x710
[ 3446.469240][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.469240][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.469240][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.469240][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.469240][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.469240][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.469240][   T72] 
[ 3446.471227][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3446.471227][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3446.471227][   T72]      ipv6_find_idev+0x102/0x170
[ 3446.471227][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3446.471227][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.471227][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.471227][   T72]      netlink_unicast+0x449/0x710
[ 3446.471227][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.471227][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.471227][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.471227][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.471227][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.471227][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.471227][   T72] 
[ 3446.472753][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3446.472753][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3446.472753][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3446.472753][   T72]      ipv6_find_idev+0x102/0x170
[ 3446.472753][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3446.472753][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.472753][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.472753][   T72]      netlink_unicast+0x449/0x710
[ 3446.472753][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.472753][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.472753][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.472753][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.472753][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.472753][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.472753][   T72] 
[ 3446.474451][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3446.474741][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3446.474741][   T72]      netdev_get_by_index+0x5e/0x80
[ 3446.474741][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3446.474741][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3446.474741][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3446.474741][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3446.474741][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3446.474741][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3446.474741][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3446.474741][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3446.474741][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3446.474741][   T72]      vfs_write+0x9e5/0x10a0
[ 3446.474741][   T72]      ksys_write+0xf5/0x1e0
[ 3446.474741][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.474741][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.474741][   T72] 
[ 3446.476572][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3446.476572][   T72]      netdev_get_by_index+0x5e/0x80
[ 3446.476572][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3446.476572][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3446.476572][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3446.476572][   T72]      ipv6_add_addr+0x411/0x2000
[ 3446.476572][   T72]      inet6_addr_add+0x30e/0xa40
[ 3446.476572][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3446.476572][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.476572][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.476572][   T72]      netlink_unicast+0x449/0x710
[ 3446.476572][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.476572][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.476572][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.476572][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.476572][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.476572][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.476572][   T72] 
[ 3446.478552][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3446.478552][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3446.478552][   T72]      ipv6_find_idev+0x102/0x170
[ 3446.478552][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3446.478552][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.478552][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.478552][   T72]      netlink_unicast+0x449/0x710
[ 3446.478552][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.478552][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.478552][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.478552][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.478552][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.478552][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.478552][   T72] 
[ 3446.480071][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3446.480071][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3446.480071][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3446.480071][   T72]      ipv6_find_idev+0x102/0x170
[ 3446.480071][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3446.480071][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3446.480071][   T72]      netlink_rcv_skb+0x130/0x360
[ 3446.480071][   T72]      netlink_unicast+0x449/0x710
[ 3446.480071][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3446.480071][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3446.480071][   T72]      ___sys_sendmsg+0xee/0x170
[ 3446.480071][   T72]      __sys_sendmsg+0xcd/0x170
[ 3446.480071][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.480071][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.480071][   T72] 
[ 3446.481735][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3446.481973][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3446.481973][   T72]      dst_init+0x84/0x4a0
[ 3446.481973][   T72]      dst_alloc+0x97/0x150
[ 3446.481973][   T72]      ip6_dst_alloc+0x23/0x90
[ 3446.481973][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3446.481973][   T72]      ip6_pol_route+0x56f/0x840
[ 3446.481973][   T72]      fib6_rule_lookup+0x227/0x600
[ 3446.481973][   T72]      ip6_route_output_flags+0x251/0x460
[ 3446.481973][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3446.481973][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3446.481973][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3446.481973][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3446.481973][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3446.481973][   T72]      __sys_connect+0x217/0x2a0
[ 3446.481973][   T72]      __x64_sys_connect+0x72/0xb0
[ 3446.481973][   T72]      do_syscall_64+0xc6/0x1e0
[ 3446.481973][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3446.481973][   T72] 
[ 3456.724642][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3456.725009][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3456.725009][   T72]      netdev_get_by_index+0x5e/0x80
[ 3456.725009][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3456.725009][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3456.725009][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3456.725009][   T72]      ipv6_add_addr+0x411/0x2000
[ 3456.725009][   T72]      inet6_addr_add+0x30e/0xa40
[ 3456.725009][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3456.725009][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.725009][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.725009][   T72]      netlink_unicast+0x449/0x710
[ 3456.725009][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.725009][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.725009][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.725009][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.725009][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.725009][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.725009][   T72] 
[ 3456.727015][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3456.727015][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3456.727015][   T72]      ipv6_find_idev+0x102/0x170
[ 3456.727015][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3456.727015][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.727015][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.727015][   T72]      netlink_unicast+0x449/0x710
[ 3456.727015][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.727015][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.727015][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.727015][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.727015][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.727015][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.727015][   T72] 
[ 3456.729047][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3456.729047][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3456.729047][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3456.729047][   T72]      ipv6_find_idev+0x102/0x170
[ 3456.729047][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3456.729047][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.729047][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.729047][   T72]      netlink_unicast+0x449/0x710
[ 3456.729047][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.729047][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.729047][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.729047][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.729047][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.729047][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.729047][   T72] 
[ 3456.730719][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3456.730990][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3456.730990][   T72]      netdev_get_by_index+0x5e/0x80
[ 3456.730990][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3456.730990][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3456.730990][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3456.730990][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3456.730990][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3456.730990][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3456.730990][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3456.730990][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3456.730990][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3456.730990][   T72]      vfs_write+0x9e5/0x10a0
[ 3456.730990][   T72]      ksys_write+0xf5/0x1e0
[ 3456.730990][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.730990][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.730990][   T72] 
[ 3456.732830][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3456.732830][   T72]      netdev_get_by_index+0x5e/0x80
[ 3456.732830][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3456.732830][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3456.732830][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3456.732830][   T72]      ipv6_add_addr+0x411/0x2000
[ 3456.732830][   T72]      inet6_addr_add+0x30e/0xa40
[ 3456.732830][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3456.732830][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.732830][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.732830][   T72]      netlink_unicast+0x449/0x710
[ 3456.732830][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.732830][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.732830][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.732830][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.732830][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.732830][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.732830][   T72] 
[ 3456.734819][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3456.734819][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3456.734819][   T72]      ipv6_find_idev+0x102/0x170
[ 3456.734819][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3456.734819][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.734819][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.734819][   T72]      netlink_unicast+0x449/0x710
[ 3456.734819][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.734819][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.734819][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.734819][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.734819][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.734819][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.734819][   T72] 
[ 3456.736351][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3456.736351][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3456.736351][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3456.736351][   T72]      ipv6_find_idev+0x102/0x170
[ 3456.736351][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3456.736351][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3456.736351][   T72]      netlink_rcv_skb+0x130/0x360
[ 3456.736351][   T72]      netlink_unicast+0x449/0x710
[ 3456.736351][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3456.736351][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3456.736351][   T72]      ___sys_sendmsg+0xee/0x170
[ 3456.736351][   T72]      __sys_sendmsg+0xcd/0x170
[ 3456.736351][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.736351][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.736351][   T72] 
[ 3456.738031][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3456.738267][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3456.738267][   T72]      dst_init+0x84/0x4a0
[ 3456.738267][   T72]      dst_alloc+0x97/0x150
[ 3456.738267][   T72]      ip6_dst_alloc+0x23/0x90
[ 3456.738267][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3456.738267][   T72]      ip6_pol_route+0x56f/0x840
[ 3456.738267][   T72]      fib6_rule_lookup+0x227/0x600
[ 3456.738267][   T72]      ip6_route_output_flags+0x251/0x460
[ 3456.738267][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3456.738267][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3456.738267][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3456.738267][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3456.738267][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3456.738267][   T72]      __sys_connect+0x217/0x2a0
[ 3456.738267][   T72]      __x64_sys_connect+0x72/0xb0
[ 3456.738267][   T72]      do_syscall_64+0xc6/0x1e0
[ 3456.738267][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3456.738267][   T72] 
[ 3466.980731][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3466.981114][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3466.981114][   T72]      netdev_get_by_index+0x5e/0x80
[ 3466.981114][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3466.981114][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3466.981114][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3466.981114][   T72]      ipv6_add_addr+0x411/0x2000
[ 3466.981114][   T72]      inet6_addr_add+0x30e/0xa40
[ 3466.981114][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3466.981114][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.981114][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.981114][   T72]      netlink_unicast+0x449/0x710
[ 3466.981114][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.981114][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.981114][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.981114][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.981114][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.981114][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.981114][   T72] 
[ 3466.983109][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3466.983109][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3466.983109][   T72]      ipv6_find_idev+0x102/0x170
[ 3466.983109][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3466.983109][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.983109][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.983109][   T72]      netlink_unicast+0x449/0x710
[ 3466.983109][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.983109][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.983109][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.983109][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.983109][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.983109][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.983109][   T72] 
[ 3466.984654][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3466.984654][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3466.984654][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3466.984654][   T72]      ipv6_find_idev+0x102/0x170
[ 3466.984654][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3466.984654][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.984654][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.984654][   T72]      netlink_unicast+0x449/0x710
[ 3466.984654][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.984654][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.984654][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.984654][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.984654][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.984654][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.984654][   T72] 
[ 3466.986334][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3466.986608][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3466.986608][   T72]      netdev_get_by_index+0x5e/0x80
[ 3466.986608][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3466.986608][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3466.986608][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3466.986608][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3466.986608][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3466.986608][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3466.986608][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3466.986608][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3466.986608][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3466.986608][   T72]      vfs_write+0x9e5/0x10a0
[ 3466.986608][   T72]      ksys_write+0xf5/0x1e0
[ 3466.986608][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.986608][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.986608][   T72] 
[ 3466.988452][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3466.988452][   T72]      netdev_get_by_index+0x5e/0x80
[ 3466.988452][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3466.988452][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3466.988452][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3466.988452][   T72]      ipv6_add_addr+0x411/0x2000
[ 3466.988452][   T72]      inet6_addr_add+0x30e/0xa40
[ 3466.988452][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3466.988452][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.988452][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.988452][   T72]      netlink_unicast+0x449/0x710
[ 3466.988452][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.988452][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.988452][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.988452][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.988452][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.988452][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.988452][   T72] 
[ 3466.990461][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3466.990461][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3466.990461][   T72]      ipv6_find_idev+0x102/0x170
[ 3466.990461][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3466.990461][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.990461][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.990461][   T72]      netlink_unicast+0x449/0x710
[ 3466.990461][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.990461][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.990461][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.990461][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.990461][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.990461][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.990461][   T72] 
[ 3466.992028][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3466.992028][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3466.992028][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3466.992028][   T72]      ipv6_find_idev+0x102/0x170
[ 3466.992028][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3466.992028][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3466.992028][   T72]      netlink_rcv_skb+0x130/0x360
[ 3466.992028][   T72]      netlink_unicast+0x449/0x710
[ 3466.992028][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3466.992028][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3466.992028][   T72]      ___sys_sendmsg+0xee/0x170
[ 3466.992028][   T72]      __sys_sendmsg+0xcd/0x170
[ 3466.992028][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.992028][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.992028][   T72] 
[ 3466.993728][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3466.993981][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3466.993981][   T72]      dst_init+0x84/0x4a0
[ 3466.993981][   T72]      dst_alloc+0x97/0x150
[ 3466.993981][   T72]      ip6_dst_alloc+0x23/0x90
[ 3466.993981][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3466.993981][   T72]      ip6_pol_route+0x56f/0x840
[ 3466.993981][   T72]      fib6_rule_lookup+0x227/0x600
[ 3466.993981][   T72]      ip6_route_output_flags+0x251/0x460
[ 3466.993981][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3466.993981][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3466.993981][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3466.993981][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3466.993981][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3466.993981][   T72]      __sys_connect+0x217/0x2a0
[ 3466.993981][   T72]      __x64_sys_connect+0x72/0xb0
[ 3466.993981][   T72]      do_syscall_64+0xc6/0x1e0
[ 3466.993981][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3466.993981][   T72] 
[ 3477.236696][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3477.237083][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3477.237083][   T72]      netdev_get_by_index+0x5e/0x80
[ 3477.237083][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3477.237083][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3477.237083][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3477.237083][   T72]      ipv6_add_addr+0x411/0x2000
[ 3477.237083][   T72]      inet6_addr_add+0x30e/0xa40
[ 3477.237083][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3477.237083][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.237083][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.237083][   T72]      netlink_unicast+0x449/0x710
[ 3477.237083][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.237083][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.237083][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.237083][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.237083][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.237083][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.237083][   T72] 
[ 3477.239151][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3477.239151][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3477.239151][   T72]      ipv6_find_idev+0x102/0x170
[ 3477.239151][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3477.239151][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.239151][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.239151][   T72]      netlink_unicast+0x449/0x710
[ 3477.239151][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.239151][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.239151][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.239151][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.239151][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.239151][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.239151][   T72] 
[ 3477.240699][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3477.240699][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3477.240699][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3477.240699][   T72]      ipv6_find_idev+0x102/0x170
[ 3477.240699][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3477.240699][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.240699][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.240699][   T72]      netlink_unicast+0x449/0x710
[ 3477.240699][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.240699][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.240699][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.240699][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.240699][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.240699][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.240699][   T72] 
[ 3477.242420][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3477.242714][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3477.242714][   T72]      netdev_get_by_index+0x5e/0x80
[ 3477.242714][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3477.242714][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3477.242714][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3477.242714][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3477.242714][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3477.242714][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3477.242714][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3477.242714][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3477.242714][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3477.242714][   T72]      vfs_write+0x9e5/0x10a0
[ 3477.242714][   T72]      ksys_write+0xf5/0x1e0
[ 3477.242714][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.242714][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.242714][   T72] 
[ 3477.244575][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3477.244575][   T72]      netdev_get_by_index+0x5e/0x80
[ 3477.244575][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3477.244575][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3477.244575][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3477.244575][   T72]      ipv6_add_addr+0x411/0x2000
[ 3477.244575][   T72]      inet6_addr_add+0x30e/0xa40
[ 3477.244575][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3477.244575][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.244575][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.244575][   T72]      netlink_unicast+0x449/0x710
[ 3477.244575][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.244575][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.244575][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.244575][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.244575][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.244575][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.244575][   T72] 
[ 3477.246589][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3477.246589][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3477.246589][   T72]      ipv6_find_idev+0x102/0x170
[ 3477.246589][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3477.246589][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.246589][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.246589][   T72]      netlink_unicast+0x449/0x710
[ 3477.246589][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.246589][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.246589][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.246589][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.246589][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.246589][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.246589][   T72] 
[ 3477.248213][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3477.248213][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3477.248213][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3477.248213][   T72]      ipv6_find_idev+0x102/0x170
[ 3477.248213][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3477.248213][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3477.248213][   T72]      netlink_rcv_skb+0x130/0x360
[ 3477.248213][   T72]      netlink_unicast+0x449/0x710
[ 3477.248213][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3477.248213][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3477.248213][   T72]      ___sys_sendmsg+0xee/0x170
[ 3477.248213][   T72]      __sys_sendmsg+0xcd/0x170
[ 3477.248213][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.248213][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.248213][   T72] 
[ 3477.249922][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3477.250164][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3477.250164][   T72]      dst_init+0x84/0x4a0
[ 3477.250164][   T72]      dst_alloc+0x97/0x150
[ 3477.250164][   T72]      ip6_dst_alloc+0x23/0x90
[ 3477.250164][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3477.250164][   T72]      ip6_pol_route+0x56f/0x840
[ 3477.250164][   T72]      fib6_rule_lookup+0x227/0x600
[ 3477.250164][   T72]      ip6_route_output_flags+0x251/0x460
[ 3477.250164][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3477.250164][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3477.250164][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3477.250164][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3477.250164][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3477.250164][   T72]      __sys_connect+0x217/0x2a0
[ 3477.250164][   T72]      __x64_sys_connect+0x72/0xb0
[ 3477.250164][   T72]      do_syscall_64+0xc6/0x1e0
[ 3477.250164][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3477.250164][   T72] 
[ 3487.444633][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3487.445121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3487.445121][   T72]      netdev_get_by_index+0x5e/0x80
[ 3487.445121][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3487.445121][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3487.445121][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3487.445121][   T72]      ipv6_add_addr+0x411/0x2000
[ 3487.445121][   T72]      inet6_addr_add+0x30e/0xa40
[ 3487.445121][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3487.445121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.445121][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.445121][   T72]      netlink_unicast+0x449/0x710
[ 3487.445121][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.445121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.445121][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.445121][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.445121][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.445121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.445121][   T72] 
[ 3487.447170][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3487.447170][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3487.447170][   T72]      ipv6_find_idev+0x102/0x170
[ 3487.447170][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3487.447170][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.447170][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.447170][   T72]      netlink_unicast+0x449/0x710
[ 3487.447170][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.447170][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.447170][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.447170][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.447170][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.447170][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.447170][   T72] 
[ 3487.448752][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3487.448752][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3487.448752][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3487.448752][   T72]      ipv6_find_idev+0x102/0x170
[ 3487.448752][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3487.448752][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.448752][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.448752][   T72]      netlink_unicast+0x449/0x710
[ 3487.448752][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.448752][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.448752][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.448752][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.448752][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.448752][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.448752][   T72] 
[ 3487.450472][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3487.450758][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3487.450758][   T72]      netdev_get_by_index+0x5e/0x80
[ 3487.450758][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3487.450758][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3487.450758][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3487.450758][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3487.450758][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3487.450758][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3487.450758][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3487.450758][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3487.450758][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3487.450758][   T72]      vfs_write+0x9e5/0x10a0
[ 3487.450758][   T72]      ksys_write+0xf5/0x1e0
[ 3487.450758][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.450758][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.450758][   T72] 
[ 3487.452628][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3487.452628][   T72]      netdev_get_by_index+0x5e/0x80
[ 3487.452628][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3487.452628][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3487.452628][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3487.452628][   T72]      ipv6_add_addr+0x411/0x2000
[ 3487.452628][   T72]      inet6_addr_add+0x30e/0xa40
[ 3487.452628][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3487.452628][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.452628][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.452628][   T72]      netlink_unicast+0x449/0x710
[ 3487.452628][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.452628][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.452628][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.452628][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.452628][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.452628][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.452628][   T72] 
[ 3487.454637][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3487.454637][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3487.454637][   T72]      ipv6_find_idev+0x102/0x170
[ 3487.454637][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3487.454637][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.454637][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.454637][   T72]      netlink_unicast+0x449/0x710
[ 3487.454637][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.454637][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.454637][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.454637][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.454637][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.454637][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.454637][   T72] 
[ 3487.456187][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3487.456187][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3487.456187][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3487.456187][   T72]      ipv6_find_idev+0x102/0x170
[ 3487.456187][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3487.456187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3487.456187][   T72]      netlink_rcv_skb+0x130/0x360
[ 3487.456187][   T72]      netlink_unicast+0x449/0x710
[ 3487.456187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3487.456187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3487.456187][   T72]      ___sys_sendmsg+0xee/0x170
[ 3487.456187][   T72]      __sys_sendmsg+0xcd/0x170
[ 3487.456187][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.456187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.456187][   T72] 
[ 3487.457880][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3487.458130][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3487.458130][   T72]      dst_init+0x84/0x4a0
[ 3487.458130][   T72]      dst_alloc+0x97/0x150
[ 3487.458130][   T72]      ip6_dst_alloc+0x23/0x90
[ 3487.458130][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3487.458130][   T72]      ip6_pol_route+0x56f/0x840
[ 3487.458130][   T72]      fib6_rule_lookup+0x227/0x600
[ 3487.458130][   T72]      ip6_route_output_flags+0x251/0x460
[ 3487.458130][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3487.458130][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3487.458130][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3487.458130][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3487.458130][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3487.458130][   T72]      __sys_connect+0x217/0x2a0
[ 3487.458130][   T72]      __x64_sys_connect+0x72/0xb0
[ 3487.458130][   T72]      do_syscall_64+0xc6/0x1e0
[ 3487.458130][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3487.458130][   T72] 
[ 3497.700723][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3497.701182][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3497.701182][   T72]      netdev_get_by_index+0x5e/0x80
[ 3497.701182][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3497.701182][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3497.701182][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3497.701182][   T72]      ipv6_add_addr+0x411/0x2000
[ 3497.701182][   T72]      inet6_addr_add+0x30e/0xa40
[ 3497.701182][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3497.701182][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.701182][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.701182][   T72]      netlink_unicast+0x449/0x710
[ 3497.701182][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.701182][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.701182][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.701182][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.701182][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.701182][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.701182][   T72] 
[ 3497.703169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3497.703169][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3497.703169][   T72]      ipv6_find_idev+0x102/0x170
[ 3497.703169][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3497.703169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.703169][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.703169][   T72]      netlink_unicast+0x449/0x710
[ 3497.703169][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.703169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.703169][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.703169][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.703169][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.703169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.703169][   T72] 
[ 3497.704712][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3497.704712][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3497.704712][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3497.704712][   T72]      ipv6_find_idev+0x102/0x170
[ 3497.704712][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3497.704712][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.704712][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.704712][   T72]      netlink_unicast+0x449/0x710
[ 3497.704712][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.704712][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.704712][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.704712][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.704712][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.704712][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.704712][   T72] 
[ 3497.706372][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3497.706660][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3497.706660][   T72]      netdev_get_by_index+0x5e/0x80
[ 3497.706660][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3497.706660][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3497.706660][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3497.706660][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3497.706660][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3497.706660][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3497.706660][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3497.706660][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3497.706660][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3497.706660][   T72]      vfs_write+0x9e5/0x10a0
[ 3497.706660][   T72]      ksys_write+0xf5/0x1e0
[ 3497.706660][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.706660][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.706660][   T72] 
[ 3497.708488][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3497.708488][   T72]      netdev_get_by_index+0x5e/0x80
[ 3497.708488][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3497.708488][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3497.708488][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3497.708488][   T72]      ipv6_add_addr+0x411/0x2000
[ 3497.708488][   T72]      inet6_addr_add+0x30e/0xa40
[ 3497.708488][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3497.708488][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.708488][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.708488][   T72]      netlink_unicast+0x449/0x710
[ 3497.708488][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.708488][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.708488][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.708488][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.708488][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.708488][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.708488][   T72] 
[ 3497.710461][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3497.710461][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3497.710461][   T72]      ipv6_find_idev+0x102/0x170
[ 3497.710461][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3497.710461][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.710461][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.710461][   T72]      netlink_unicast+0x449/0x710
[ 3497.710461][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.710461][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.710461][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.710461][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.710461][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.710461][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.710461][   T72] 
[ 3497.711983][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3497.711983][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3497.711983][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3497.711983][   T72]      ipv6_find_idev+0x102/0x170
[ 3497.711983][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3497.711983][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3497.711983][   T72]      netlink_rcv_skb+0x130/0x360
[ 3497.711983][   T72]      netlink_unicast+0x449/0x710
[ 3497.711983][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3497.711983][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3497.711983][   T72]      ___sys_sendmsg+0xee/0x170
[ 3497.711983][   T72]      __sys_sendmsg+0xcd/0x170
[ 3497.711983][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.711983][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.711983][   T72] 
[ 3497.713641][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3497.713881][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3497.713881][   T72]      dst_init+0x84/0x4a0
[ 3497.713881][   T72]      dst_alloc+0x97/0x150
[ 3497.713881][   T72]      ip6_dst_alloc+0x23/0x90
[ 3497.713881][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3497.713881][   T72]      ip6_pol_route+0x56f/0x840
[ 3497.713881][   T72]      fib6_rule_lookup+0x227/0x600
[ 3497.713881][   T72]      ip6_route_output_flags+0x251/0x460
[ 3497.713881][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3497.713881][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3497.713881][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3497.713881][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3497.713881][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3497.713881][   T72]      __sys_connect+0x217/0x2a0
[ 3497.713881][   T72]      __x64_sys_connect+0x72/0xb0
[ 3497.713881][   T72]      do_syscall_64+0xc6/0x1e0
[ 3497.713881][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3497.713881][   T72] 
[ 3507.836794][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3507.837175][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3507.837175][   T72]      netdev_get_by_index+0x5e/0x80
[ 3507.837175][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3507.837175][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3507.837175][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3507.837175][   T72]      ipv6_add_addr+0x411/0x2000
[ 3507.837175][   T72]      inet6_addr_add+0x30e/0xa40
[ 3507.837175][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3507.837175][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.837175][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.837175][   T72]      netlink_unicast+0x449/0x710
[ 3507.837175][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.837175][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.837175][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.837175][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.837175][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.837175][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.837175][   T72] 
[ 3507.839185][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3507.839185][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3507.839185][   T72]      ipv6_find_idev+0x102/0x170
[ 3507.839185][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3507.839185][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.839185][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.839185][   T72]      netlink_unicast+0x449/0x710
[ 3507.839185][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.839185][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.839185][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.839185][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.839185][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.839185][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.839185][   T72] 
[ 3507.840715][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3507.840715][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3507.840715][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3507.840715][   T72]      ipv6_find_idev+0x102/0x170
[ 3507.840715][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3507.840715][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.840715][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.840715][   T72]      netlink_unicast+0x449/0x710
[ 3507.840715][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.840715][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.840715][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.840715][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.840715][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.840715][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.840715][   T72] 
[ 3507.842489][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3507.842769][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3507.842769][   T72]      netdev_get_by_index+0x5e/0x80
[ 3507.842769][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3507.842769][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3507.842769][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3507.842769][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3507.842769][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3507.842769][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3507.842769][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3507.842769][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3507.842769][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3507.842769][   T72]      vfs_write+0x9e5/0x10a0
[ 3507.842769][   T72]      ksys_write+0xf5/0x1e0
[ 3507.842769][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.842769][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.842769][   T72] 
[ 3507.844624][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3507.844624][   T72]      netdev_get_by_index+0x5e/0x80
[ 3507.844624][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3507.844624][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3507.844624][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3507.844624][   T72]      ipv6_add_addr+0x411/0x2000
[ 3507.844624][   T72]      inet6_addr_add+0x30e/0xa40
[ 3507.844624][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3507.844624][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.844624][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.844624][   T72]      netlink_unicast+0x449/0x710
[ 3507.844624][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.844624][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.844624][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.844624][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.844624][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.844624][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.844624][   T72] 
[ 3507.846592][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3507.846592][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3507.846592][   T72]      ipv6_find_idev+0x102/0x170
[ 3507.846592][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3507.846592][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.846592][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.846592][   T72]      netlink_unicast+0x449/0x710
[ 3507.846592][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.846592][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.846592][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.846592][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.846592][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.846592][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.846592][   T72] 
[ 3507.848187][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3507.848187][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3507.848187][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3507.848187][   T72]      ipv6_find_idev+0x102/0x170
[ 3507.848187][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3507.848187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3507.848187][   T72]      netlink_rcv_skb+0x130/0x360
[ 3507.848187][   T72]      netlink_unicast+0x449/0x710
[ 3507.848187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3507.848187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3507.848187][   T72]      ___sys_sendmsg+0xee/0x170
[ 3507.848187][   T72]      __sys_sendmsg+0xcd/0x170
[ 3507.848187][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.848187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.848187][   T72] 
[ 3507.851084][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3507.851492][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3507.851492][   T72]      dst_init+0x84/0x4a0
[ 3507.851492][   T72]      dst_alloc+0x97/0x150
[ 3507.851492][   T72]      ip6_dst_alloc+0x23/0x90
[ 3507.851492][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3507.851492][   T72]      ip6_pol_route+0x56f/0x840
[ 3507.851492][   T72]      fib6_rule_lookup+0x227/0x600
[ 3507.851492][   T72]      ip6_route_output_flags+0x251/0x460
[ 3507.851492][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3507.851492][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3507.851492][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3507.851492][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3507.851492][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3507.851492][   T72]      __sys_connect+0x217/0x2a0
[ 3507.851492][   T72]      __x64_sys_connect+0x72/0xb0
[ 3507.851492][   T72]      do_syscall_64+0xc6/0x1e0
[ 3507.851492][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3507.851492][   T72] 
[ 3518.092704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3518.093154][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3518.093154][   T72]      netdev_get_by_index+0x5e/0x80
[ 3518.093154][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3518.093154][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3518.093154][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3518.093154][   T72]      ipv6_add_addr+0x411/0x2000
[ 3518.093154][   T72]      inet6_addr_add+0x30e/0xa40
[ 3518.093154][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3518.093154][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.093154][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.093154][   T72]      netlink_unicast+0x449/0x710
[ 3518.093154][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.093154][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.093154][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.093154][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.093154][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.093154][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.093154][   T72] 
[ 3518.095156][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3518.095156][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3518.095156][   T72]      ipv6_find_idev+0x102/0x170
[ 3518.095156][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3518.095156][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.095156][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.095156][   T72]      netlink_unicast+0x449/0x710
[ 3518.095156][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.095156][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.095156][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.095156][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.095156][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.095156][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.095156][   T72] 
[ 3518.096685][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3518.096685][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3518.096685][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3518.096685][   T72]      ipv6_find_idev+0x102/0x170
[ 3518.096685][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3518.096685][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.096685][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.096685][   T72]      netlink_unicast+0x449/0x710
[ 3518.096685][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.096685][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.096685][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.096685][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.096685][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.096685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.096685][   T72] 
[ 3518.098364][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3518.098639][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3518.098639][   T72]      netdev_get_by_index+0x5e/0x80
[ 3518.098639][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3518.098639][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3518.098639][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3518.098639][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3518.098639][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3518.098639][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3518.098639][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3518.098639][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3518.098639][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3518.098639][   T72]      vfs_write+0x9e5/0x10a0
[ 3518.098639][   T72]      ksys_write+0xf5/0x1e0
[ 3518.098639][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.098639][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.098639][   T72] 
[ 3518.100463][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3518.100463][   T72]      netdev_get_by_index+0x5e/0x80
[ 3518.100463][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3518.100463][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3518.100463][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3518.100463][   T72]      ipv6_add_addr+0x411/0x2000
[ 3518.100463][   T72]      inet6_addr_add+0x30e/0xa40
[ 3518.100463][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3518.100463][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.100463][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.100463][   T72]      netlink_unicast+0x449/0x710
[ 3518.100463][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.100463][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.100463][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.100463][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.100463][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.100463][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.100463][   T72] 
[ 3518.102446][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3518.102446][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3518.102446][   T72]      ipv6_find_idev+0x102/0x170
[ 3518.102446][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3518.102446][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.102446][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.102446][   T72]      netlink_unicast+0x449/0x710
[ 3518.102446][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.102446][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.102446][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.102446][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.102446][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.102446][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.102446][   T72] 
[ 3518.103979][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3518.103979][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3518.103979][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3518.103979][   T72]      ipv6_find_idev+0x102/0x170
[ 3518.103979][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3518.103979][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3518.103979][   T72]      netlink_rcv_skb+0x130/0x360
[ 3518.103979][   T72]      netlink_unicast+0x449/0x710
[ 3518.103979][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3518.103979][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3518.103979][   T72]      ___sys_sendmsg+0xee/0x170
[ 3518.103979][   T72]      __sys_sendmsg+0xcd/0x170
[ 3518.103979][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.103979][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.103979][   T72] 
[ 3518.105691][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3518.105932][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3518.105932][   T72]      dst_init+0x84/0x4a0
[ 3518.105932][   T72]      dst_alloc+0x97/0x150
[ 3518.105932][   T72]      ip6_dst_alloc+0x23/0x90
[ 3518.105932][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3518.105932][   T72]      ip6_pol_route+0x56f/0x840
[ 3518.105932][   T72]      fib6_rule_lookup+0x227/0x600
[ 3518.105932][   T72]      ip6_route_output_flags+0x251/0x460
[ 3518.105932][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3518.105932][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3518.105932][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3518.105932][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3518.105932][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3518.105932][   T72]      __sys_connect+0x217/0x2a0
[ 3518.105932][   T72]      __x64_sys_connect+0x72/0xb0
[ 3518.105932][   T72]      do_syscall_64+0xc6/0x1e0
[ 3518.105932][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3518.105932][   T72] 
[ 3528.348694][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3528.349121][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3528.349121][   T72]      netdev_get_by_index+0x5e/0x80
[ 3528.349121][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3528.349121][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3528.349121][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3528.349121][   T72]      ipv6_add_addr+0x411/0x2000
[ 3528.349121][   T72]      inet6_addr_add+0x30e/0xa40
[ 3528.349121][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3528.349121][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.349121][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.349121][   T72]      netlink_unicast+0x449/0x710
[ 3528.349121][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.349121][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.349121][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.349121][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.349121][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.349121][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.349121][   T72] 
[ 3528.351144][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3528.351144][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3528.351144][   T72]      ipv6_find_idev+0x102/0x170
[ 3528.351144][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3528.351144][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.351144][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.351144][   T72]      netlink_unicast+0x449/0x710
[ 3528.351144][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.351144][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.351144][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.351144][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.351144][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.351144][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.351144][   T72] 
[ 3528.352680][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3528.352680][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3528.352680][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3528.352680][   T72]      ipv6_find_idev+0x102/0x170
[ 3528.352680][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3528.352680][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.352680][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.352680][   T72]      netlink_unicast+0x449/0x710
[ 3528.352680][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.352680][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.352680][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.352680][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.352680][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.352680][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.352680][   T72] 
[ 3528.354384][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3528.354677][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3528.354677][   T72]      netdev_get_by_index+0x5e/0x80
[ 3528.354677][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3528.354677][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3528.354677][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3528.354677][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3528.354677][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3528.354677][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3528.354677][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3528.354677][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3528.354677][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3528.354677][   T72]      vfs_write+0x9e5/0x10a0
[ 3528.354677][   T72]      ksys_write+0xf5/0x1e0
[ 3528.354677][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.354677][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.354677][   T72] 
[ 3528.356514][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3528.356514][   T72]      netdev_get_by_index+0x5e/0x80
[ 3528.356514][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3528.356514][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3528.356514][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3528.356514][   T72]      ipv6_add_addr+0x411/0x2000
[ 3528.356514][   T72]      inet6_addr_add+0x30e/0xa40
[ 3528.356514][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3528.356514][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.356514][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.356514][   T72]      netlink_unicast+0x449/0x710
[ 3528.356514][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.356514][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.356514][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.356514][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.356514][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.356514][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.356514][   T72] 
[ 3528.358498][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3528.358498][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3528.358498][   T72]      ipv6_find_idev+0x102/0x170
[ 3528.358498][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3528.358498][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.358498][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.358498][   T72]      netlink_unicast+0x449/0x710
[ 3528.358498][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.358498][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.358498][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.358498][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.358498][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.358498][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.358498][   T72] 
[ 3528.360018][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3528.360018][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3528.360018][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3528.360018][   T72]      ipv6_find_idev+0x102/0x170
[ 3528.360018][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3528.360018][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3528.360018][   T72]      netlink_rcv_skb+0x130/0x360
[ 3528.360018][   T72]      netlink_unicast+0x449/0x710
[ 3528.360018][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3528.360018][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3528.360018][   T72]      ___sys_sendmsg+0xee/0x170
[ 3528.360018][   T72]      __sys_sendmsg+0xcd/0x170
[ 3528.360018][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.360018][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.360018][   T72] 
[ 3528.361690][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3528.361923][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3528.361923][   T72]      dst_init+0x84/0x4a0
[ 3528.361923][   T72]      dst_alloc+0x97/0x150
[ 3528.361923][   T72]      ip6_dst_alloc+0x23/0x90
[ 3528.361923][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3528.361923][   T72]      ip6_pol_route+0x56f/0x840
[ 3528.361923][   T72]      fib6_rule_lookup+0x227/0x600
[ 3528.361923][   T72]      ip6_route_output_flags+0x251/0x460
[ 3528.361923][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3528.361923][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3528.361923][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3528.361923][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3528.361923][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3528.361923][   T72]      __sys_connect+0x217/0x2a0
[ 3528.361923][   T72]      __x64_sys_connect+0x72/0xb0
[ 3528.361923][   T72]      do_syscall_64+0xc6/0x1e0
[ 3528.361923][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3528.361923][   T72] 
[ 3538.364697][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3538.365129][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3538.365129][   T72]      netdev_get_by_index+0x5e/0x80
[ 3538.365129][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3538.365129][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3538.365129][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3538.365129][   T72]      ipv6_add_addr+0x411/0x2000
[ 3538.365129][   T72]      inet6_addr_add+0x30e/0xa40
[ 3538.365129][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3538.365129][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.365129][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.365129][   T72]      netlink_unicast+0x449/0x710
[ 3538.365129][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.365129][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.365129][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.365129][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.365129][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.365129][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.365129][   T72] 
[ 3538.367143][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3538.367143][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3538.367143][   T72]      ipv6_find_idev+0x102/0x170
[ 3538.367143][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3538.367143][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.367143][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.367143][   T72]      netlink_unicast+0x449/0x710
[ 3538.367143][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.367143][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.367143][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.367143][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.367143][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.367143][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.367143][   T72] 
[ 3538.368667][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3538.368667][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3538.368667][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3538.368667][   T72]      ipv6_find_idev+0x102/0x170
[ 3538.368667][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3538.368667][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.368667][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.368667][   T72]      netlink_unicast+0x449/0x710
[ 3538.368667][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.368667][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.368667][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.368667][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.368667][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.368667][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.368667][   T72] 
[ 3538.370328][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3538.370593][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3538.370593][   T72]      netdev_get_by_index+0x5e/0x80
[ 3538.370593][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3538.370593][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3538.370593][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3538.370593][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3538.370593][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3538.370593][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3538.370593][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3538.370593][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3538.370593][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3538.370593][   T72]      vfs_write+0x9e5/0x10a0
[ 3538.370593][   T72]      ksys_write+0xf5/0x1e0
[ 3538.370593][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.370593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.370593][   T72] 
[ 3538.372428][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3538.372428][   T72]      netdev_get_by_index+0x5e/0x80
[ 3538.372428][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3538.372428][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3538.372428][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3538.372428][   T72]      ipv6_add_addr+0x411/0x2000
[ 3538.372428][   T72]      inet6_addr_add+0x30e/0xa40
[ 3538.372428][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3538.372428][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.372428][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.372428][   T72]      netlink_unicast+0x449/0x710
[ 3538.372428][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.372428][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.372428][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.372428][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.372428][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.372428][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.372428][   T72] 
[ 3538.374403][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3538.374403][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3538.374403][   T72]      ipv6_find_idev+0x102/0x170
[ 3538.374403][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3538.374403][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.374403][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.374403][   T72]      netlink_unicast+0x449/0x710
[ 3538.374403][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.374403][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.374403][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.374403][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.374403][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.374403][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.374403][   T72] 
[ 3538.375926][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3538.375926][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3538.375926][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3538.375926][   T72]      ipv6_find_idev+0x102/0x170
[ 3538.375926][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3538.375926][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3538.375926][   T72]      netlink_rcv_skb+0x130/0x360
[ 3538.375926][   T72]      netlink_unicast+0x449/0x710
[ 3538.375926][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3538.375926][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3538.375926][   T72]      ___sys_sendmsg+0xee/0x170
[ 3538.375926][   T72]      __sys_sendmsg+0xcd/0x170
[ 3538.375926][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.375926][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.375926][   T72] 
[ 3538.377611][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3538.377870][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3538.377870][   T72]      dst_init+0x84/0x4a0
[ 3538.377870][   T72]      dst_alloc+0x97/0x150
[ 3538.377870][   T72]      ip6_dst_alloc+0x23/0x90
[ 3538.377870][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3538.377870][   T72]      ip6_pol_route+0x56f/0x840
[ 3538.377870][   T72]      fib6_rule_lookup+0x227/0x600
[ 3538.377870][   T72]      ip6_route_output_flags+0x251/0x460
[ 3538.377870][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3538.377870][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3538.377870][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3538.377870][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3538.377870][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3538.377870][   T72]      __sys_connect+0x217/0x2a0
[ 3538.377870][   T72]      __x64_sys_connect+0x72/0xb0
[ 3538.377870][   T72]      do_syscall_64+0xc6/0x1e0
[ 3538.377870][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3538.377870][   T72] 
[ 3548.628716][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3548.629125][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3548.629125][   T72]      netdev_get_by_index+0x5e/0x80
[ 3548.629125][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3548.629125][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3548.629125][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3548.629125][   T72]      ipv6_add_addr+0x411/0x2000
[ 3548.629125][   T72]      inet6_addr_add+0x30e/0xa40
[ 3548.629125][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3548.629125][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.629125][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.629125][   T72]      netlink_unicast+0x449/0x710
[ 3548.629125][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.629125][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.629125][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.629125][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.629125][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.629125][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.629125][   T72] 
[ 3548.631111][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3548.631111][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3548.631111][   T72]      ipv6_find_idev+0x102/0x170
[ 3548.631111][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3548.631111][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.631111][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.631111][   T72]      netlink_unicast+0x449/0x710
[ 3548.631111][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.631111][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.631111][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.631111][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.631111][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.631111][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.631111][   T72] 
[ 3548.632675][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3548.632675][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3548.632675][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3548.632675][   T72]      ipv6_find_idev+0x102/0x170
[ 3548.632675][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3548.632675][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.632675][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.632675][   T72]      netlink_unicast+0x449/0x710
[ 3548.632675][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.632675][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.632675][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.632675][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.632675][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.632675][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.632675][   T72] 
[ 3548.634358][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3548.634632][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3548.634632][   T72]      netdev_get_by_index+0x5e/0x80
[ 3548.634632][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3548.634632][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3548.634632][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3548.634632][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3548.634632][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3548.634632][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3548.634632][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3548.634632][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3548.634632][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3548.634632][   T72]      vfs_write+0x9e5/0x10a0
[ 3548.634632][   T72]      ksys_write+0xf5/0x1e0
[ 3548.634632][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.634632][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.634632][   T72] 
[ 3548.636468][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3548.636468][   T72]      netdev_get_by_index+0x5e/0x80
[ 3548.636468][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3548.636468][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3548.636468][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3548.636468][   T72]      ipv6_add_addr+0x411/0x2000
[ 3548.636468][   T72]      inet6_addr_add+0x30e/0xa40
[ 3548.636468][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3548.636468][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.636468][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.636468][   T72]      netlink_unicast+0x449/0x710
[ 3548.636468][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.636468][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.636468][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.636468][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.636468][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.636468][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.636468][   T72] 
[ 3548.638455][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3548.638455][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3548.638455][   T72]      ipv6_find_idev+0x102/0x170
[ 3548.638455][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3548.638455][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.638455][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.638455][   T72]      netlink_unicast+0x449/0x710
[ 3548.638455][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.638455][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.638455][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.638455][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.638455][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.638455][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.638455][   T72] 
[ 3548.639975][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3548.639975][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3548.639975][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3548.639975][   T72]      ipv6_find_idev+0x102/0x170
[ 3548.639975][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3548.639975][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3548.639975][   T72]      netlink_rcv_skb+0x130/0x360
[ 3548.639975][   T72]      netlink_unicast+0x449/0x710
[ 3548.639975][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3548.639975][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3548.639975][   T72]      ___sys_sendmsg+0xee/0x170
[ 3548.639975][   T72]      __sys_sendmsg+0xcd/0x170
[ 3548.639975][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.639975][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.639975][   T72] 
[ 3548.641640][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3548.641911][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3548.641911][   T72]      dst_init+0x84/0x4a0
[ 3548.641911][   T72]      dst_alloc+0x97/0x150
[ 3548.641911][   T72]      ip6_dst_alloc+0x23/0x90
[ 3548.641911][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3548.641911][   T72]      ip6_pol_route+0x56f/0x840
[ 3548.641911][   T72]      fib6_rule_lookup+0x227/0x600
[ 3548.641911][   T72]      ip6_route_output_flags+0x251/0x460
[ 3548.641911][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3548.641911][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3548.641911][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3548.641911][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3548.641911][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3548.641911][   T72]      __sys_connect+0x217/0x2a0
[ 3548.641911][   T72]      __x64_sys_connect+0x72/0xb0
[ 3548.641911][   T72]      do_syscall_64+0xc6/0x1e0
[ 3548.641911][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3548.641911][   T72] 
[ 3558.644666][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3558.645038][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3558.645038][   T72]      netdev_get_by_index+0x5e/0x80
[ 3558.645038][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3558.645038][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3558.645038][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3558.645038][   T72]      ipv6_add_addr+0x411/0x2000
[ 3558.645038][   T72]      inet6_addr_add+0x30e/0xa40
[ 3558.645038][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3558.645038][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.645038][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.645038][   T72]      netlink_unicast+0x449/0x710
[ 3558.645038][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.645038][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.645038][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.645038][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.645038][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.645038][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.645038][   T72] 
[ 3558.647055][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3558.647055][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3558.647055][   T72]      ipv6_find_idev+0x102/0x170
[ 3558.647055][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3558.647055][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.647055][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.647055][   T72]      netlink_unicast+0x449/0x710
[ 3558.647055][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.647055][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.647055][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.647055][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.647055][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.647055][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.647055][   T72] 
[ 3558.648588][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3558.648588][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3558.648588][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3558.648588][   T72]      ipv6_find_idev+0x102/0x170
[ 3558.648588][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3558.648588][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.648588][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.648588][   T72]      netlink_unicast+0x449/0x710
[ 3558.648588][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.648588][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.648588][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.648588][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.648588][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.648588][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.648588][   T72] 
[ 3558.650266][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3558.650529][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3558.650529][   T72]      netdev_get_by_index+0x5e/0x80
[ 3558.650529][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3558.650529][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3558.650529][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3558.650529][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3558.650529][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3558.650529][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3558.650529][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3558.650529][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3558.650529][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3558.650529][   T72]      vfs_write+0x9e5/0x10a0
[ 3558.650529][   T72]      ksys_write+0xf5/0x1e0
[ 3558.650529][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.650529][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.650529][   T72] 
[ 3558.652380][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3558.652380][   T72]      netdev_get_by_index+0x5e/0x80
[ 3558.652380][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3558.652380][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3558.652380][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3558.652380][   T72]      ipv6_add_addr+0x411/0x2000
[ 3558.652380][   T72]      inet6_addr_add+0x30e/0xa40
[ 3558.652380][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3558.652380][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.652380][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.652380][   T72]      netlink_unicast+0x449/0x710
[ 3558.652380][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.652380][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.652380][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.652380][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.652380][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.652380][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.652380][   T72] 
[ 3558.654380][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3558.654380][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3558.654380][   T72]      ipv6_find_idev+0x102/0x170
[ 3558.654380][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3558.654380][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.654380][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.654380][   T72]      netlink_unicast+0x449/0x710
[ 3558.654380][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.654380][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.654380][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.654380][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.654380][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.654380][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.654380][   T72] 
[ 3558.655913][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3558.655913][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3558.655913][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3558.655913][   T72]      ipv6_find_idev+0x102/0x170
[ 3558.655913][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3558.655913][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3558.655913][   T72]      netlink_rcv_skb+0x130/0x360
[ 3558.655913][   T72]      netlink_unicast+0x449/0x710
[ 3558.655913][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3558.655913][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3558.655913][   T72]      ___sys_sendmsg+0xee/0x170
[ 3558.655913][   T72]      __sys_sendmsg+0xcd/0x170
[ 3558.655913][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.655913][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.655913][   T72] 
[ 3558.657616][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3558.657857][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3558.657857][   T72]      dst_init+0x84/0x4a0
[ 3558.657857][   T72]      dst_alloc+0x97/0x150
[ 3558.657857][   T72]      ip6_dst_alloc+0x23/0x90
[ 3558.657857][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3558.657857][   T72]      ip6_pol_route+0x56f/0x840
[ 3558.657857][   T72]      fib6_rule_lookup+0x227/0x600
[ 3558.657857][   T72]      ip6_route_output_flags+0x251/0x460
[ 3558.657857][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3558.657857][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3558.657857][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3558.657857][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3558.657857][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3558.657857][   T72]      __sys_connect+0x217/0x2a0
[ 3558.657857][   T72]      __x64_sys_connect+0x72/0xb0
[ 3558.657857][   T72]      do_syscall_64+0xc6/0x1e0
[ 3558.657857][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3558.657857][   T72] 
[ 3568.900734][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3568.901199][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3568.901199][   T72]      netdev_get_by_index+0x5e/0x80
[ 3568.901199][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3568.901199][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3568.901199][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3568.901199][   T72]      ipv6_add_addr+0x411/0x2000
[ 3568.901199][   T72]      inet6_addr_add+0x30e/0xa40
[ 3568.901199][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3568.901199][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.901199][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.901199][   T72]      netlink_unicast+0x449/0x710
[ 3568.901199][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.901199][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.901199][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.901199][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.901199][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.901199][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.901199][   T72] 
[ 3568.903197][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3568.903197][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3568.903197][   T72]      ipv6_find_idev+0x102/0x170
[ 3568.903197][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3568.903197][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.903197][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.903197][   T72]      netlink_unicast+0x449/0x710
[ 3568.903197][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.903197][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.903197][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.903197][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.903197][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.903197][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.903197][   T72] 
[ 3568.904738][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3568.904738][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3568.904738][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3568.904738][   T72]      ipv6_find_idev+0x102/0x170
[ 3568.904738][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3568.904738][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.904738][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.904738][   T72]      netlink_unicast+0x449/0x710
[ 3568.904738][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.904738][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.904738][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.904738][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.904738][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.904738][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.904738][   T72] 
[ 3568.906425][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3568.906705][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3568.906705][   T72]      netdev_get_by_index+0x5e/0x80
[ 3568.906705][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3568.906705][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3568.906705][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3568.906705][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3568.906705][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3568.906705][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3568.906705][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3568.906705][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3568.906705][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3568.906705][   T72]      vfs_write+0x9e5/0x10a0
[ 3568.906705][   T72]      ksys_write+0xf5/0x1e0
[ 3568.906705][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.906705][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.906705][   T72] 
[ 3568.908541][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3568.908541][   T72]      netdev_get_by_index+0x5e/0x80
[ 3568.908541][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3568.908541][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3568.908541][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3568.908541][   T72]      ipv6_add_addr+0x411/0x2000
[ 3568.908541][   T72]      inet6_addr_add+0x30e/0xa40
[ 3568.908541][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3568.908541][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.908541][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.908541][   T72]      netlink_unicast+0x449/0x710
[ 3568.908541][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.908541][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.908541][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.908541][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.908541][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.908541][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.908541][   T72] 
[ 3568.910535][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3568.910535][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3568.910535][   T72]      ipv6_find_idev+0x102/0x170
[ 3568.910535][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3568.910535][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.910535][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.910535][   T72]      netlink_unicast+0x449/0x710
[ 3568.910535][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.910535][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.910535][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.910535][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.910535][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.910535][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.910535][   T72] 
[ 3568.912061][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3568.912061][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3568.912061][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3568.912061][   T72]      ipv6_find_idev+0x102/0x170
[ 3568.912061][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3568.912061][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3568.912061][   T72]      netlink_rcv_skb+0x130/0x360
[ 3568.912061][   T72]      netlink_unicast+0x449/0x710
[ 3568.912061][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3568.912061][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3568.912061][   T72]      ___sys_sendmsg+0xee/0x170
[ 3568.912061][   T72]      __sys_sendmsg+0xcd/0x170
[ 3568.912061][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.912061][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.912061][   T72] 
[ 3568.913843][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3568.914083][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3568.914083][   T72]      dst_init+0x84/0x4a0
[ 3568.914083][   T72]      dst_alloc+0x97/0x150
[ 3568.914083][   T72]      ip6_dst_alloc+0x23/0x90
[ 3568.914083][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3568.914083][   T72]      ip6_pol_route+0x56f/0x840
[ 3568.914083][   T72]      fib6_rule_lookup+0x227/0x600
[ 3568.914083][   T72]      ip6_route_output_flags+0x251/0x460
[ 3568.914083][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3568.914083][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3568.914083][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3568.914083][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3568.914083][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3568.914083][   T72]      __sys_connect+0x217/0x2a0
[ 3568.914083][   T72]      __x64_sys_connect+0x72/0xb0
[ 3568.914083][   T72]      do_syscall_64+0xc6/0x1e0
[ 3568.914083][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3568.914083][   T72] 
[ 3579.156728][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3579.157186][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3579.157186][   T72]      netdev_get_by_index+0x5e/0x80
[ 3579.157186][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3579.157186][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3579.157186][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3579.157186][   T72]      ipv6_add_addr+0x411/0x2000
[ 3579.157186][   T72]      inet6_addr_add+0x30e/0xa40
[ 3579.157186][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3579.157186][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.157186][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.157186][   T72]      netlink_unicast+0x449/0x710
[ 3579.157186][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.157186][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.157186][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.157186][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.157186][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.157186][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.157186][   T72] 
[ 3579.159214][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3579.159214][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3579.159214][   T72]      ipv6_find_idev+0x102/0x170
[ 3579.159214][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3579.159214][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.159214][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.159214][   T72]      netlink_unicast+0x449/0x710
[ 3579.159214][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.159214][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.159214][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.159214][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.159214][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.159214][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.159214][   T72] 
[ 3579.160744][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3579.160744][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3579.160744][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3579.160744][   T72]      ipv6_find_idev+0x102/0x170
[ 3579.160744][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3579.160744][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.160744][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.160744][   T72]      netlink_unicast+0x449/0x710
[ 3579.160744][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.160744][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.160744][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.160744][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.160744][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.160744][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.160744][   T72] 
[ 3579.162433][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3579.162715][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3579.162715][   T72]      netdev_get_by_index+0x5e/0x80
[ 3579.162715][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3579.162715][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3579.162715][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3579.162715][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3579.162715][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3579.162715][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3579.162715][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3579.162715][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3579.162715][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3579.162715][   T72]      vfs_write+0x9e5/0x10a0
[ 3579.162715][   T72]      ksys_write+0xf5/0x1e0
[ 3579.162715][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.162715][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.162715][   T72] 
[ 3579.164561][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3579.164561][   T72]      netdev_get_by_index+0x5e/0x80
[ 3579.164561][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3579.164561][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3579.164561][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3579.164561][   T72]      ipv6_add_addr+0x411/0x2000
[ 3579.164561][   T72]      inet6_addr_add+0x30e/0xa40
[ 3579.164561][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3579.164561][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.164561][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.164561][   T72]      netlink_unicast+0x449/0x710
[ 3579.164561][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.164561][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.164561][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.164561][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.164561][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.164561][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.164561][   T72] 
[ 3579.166554][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3579.166554][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3579.166554][   T72]      ipv6_find_idev+0x102/0x170
[ 3579.166554][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3579.166554][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.166554][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.166554][   T72]      netlink_unicast+0x449/0x710
[ 3579.166554][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.166554][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.166554][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.166554][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.166554][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.166554][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.166554][   T72] 
[ 3579.168080][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3579.168080][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3579.168080][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3579.168080][   T72]      ipv6_find_idev+0x102/0x170
[ 3579.168080][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3579.168080][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3579.168080][   T72]      netlink_rcv_skb+0x130/0x360
[ 3579.168080][   T72]      netlink_unicast+0x449/0x710
[ 3579.168080][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3579.168080][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3579.168080][   T72]      ___sys_sendmsg+0xee/0x170
[ 3579.168080][   T72]      __sys_sendmsg+0xcd/0x170
[ 3579.168080][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.168080][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.168080][   T72] 
[ 3579.169748][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3579.169981][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3579.169981][   T72]      dst_init+0x84/0x4a0
[ 3579.169981][   T72]      dst_alloc+0x97/0x150
[ 3579.169981][   T72]      ip6_dst_alloc+0x23/0x90
[ 3579.169981][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3579.169981][   T72]      ip6_pol_route+0x56f/0x840
[ 3579.169981][   T72]      fib6_rule_lookup+0x227/0x600
[ 3579.169981][   T72]      ip6_route_output_flags+0x251/0x460
[ 3579.169981][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3579.169981][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3579.169981][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3579.169981][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3579.169981][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3579.169981][   T72]      __sys_connect+0x217/0x2a0
[ 3579.169981][   T72]      __x64_sys_connect+0x72/0xb0
[ 3579.169981][   T72]      do_syscall_64+0xc6/0x1e0
[ 3579.169981][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3579.169981][   T72] 
[ 3589.412728][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3589.413206][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3589.413206][   T72]      netdev_get_by_index+0x5e/0x80
[ 3589.413206][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3589.413206][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3589.413206][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3589.413206][   T72]      ipv6_add_addr+0x411/0x2000
[ 3589.413206][   T72]      inet6_addr_add+0x30e/0xa40
[ 3589.413206][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3589.413206][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.413206][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.413206][   T72]      netlink_unicast+0x449/0x710
[ 3589.413206][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.413206][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.413206][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.413206][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.413206][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.413206][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.413206][   T72] 
[ 3589.415235][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3589.415235][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3589.415235][   T72]      ipv6_find_idev+0x102/0x170
[ 3589.415235][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3589.415235][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.415235][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.415235][   T72]      netlink_unicast+0x449/0x710
[ 3589.415235][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.415235][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.415235][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.415235][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.415235][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.415235][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.415235][   T72] 
[ 3589.416777][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3589.416777][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3589.416777][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3589.416777][   T72]      ipv6_find_idev+0x102/0x170
[ 3589.416777][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3589.416777][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.416777][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.416777][   T72]      netlink_unicast+0x449/0x710
[ 3589.416777][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.416777][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.416777][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.416777][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.416777][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.416777][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.416777][   T72] 
[ 3589.418448][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3589.418729][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3589.418729][   T72]      netdev_get_by_index+0x5e/0x80
[ 3589.418729][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3589.418729][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3589.418729][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3589.418729][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3589.418729][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3589.418729][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3589.418729][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3589.418729][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3589.418729][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3589.418729][   T72]      vfs_write+0x9e5/0x10a0
[ 3589.418729][   T72]      ksys_write+0xf5/0x1e0
[ 3589.418729][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.418729][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.418729][   T72] 
[ 3589.420583][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3589.420583][   T72]      netdev_get_by_index+0x5e/0x80
[ 3589.420583][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3589.420583][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3589.420583][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3589.420583][   T72]      ipv6_add_addr+0x411/0x2000
[ 3589.420583][   T72]      inet6_addr_add+0x30e/0xa40
[ 3589.420583][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3589.420583][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.420583][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.420583][   T72]      netlink_unicast+0x449/0x710
[ 3589.420583][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.420583][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.420583][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.420583][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.420583][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.420583][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.420583][   T72] 
[ 3589.422568][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3589.422568][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3589.422568][   T72]      ipv6_find_idev+0x102/0x170
[ 3589.422568][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3589.422568][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.422568][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.422568][   T72]      netlink_unicast+0x449/0x710
[ 3589.422568][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.422568][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.422568][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.422568][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.422568][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.422568][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.422568][   T72] 
[ 3589.424116][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3589.424116][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3589.424116][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3589.424116][   T72]      ipv6_find_idev+0x102/0x170
[ 3589.424116][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3589.424116][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3589.424116][   T72]      netlink_rcv_skb+0x130/0x360
[ 3589.424116][   T72]      netlink_unicast+0x449/0x710
[ 3589.424116][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3589.424116][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3589.424116][   T72]      ___sys_sendmsg+0xee/0x170
[ 3589.424116][   T72]      __sys_sendmsg+0xcd/0x170
[ 3589.424116][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.424116][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.424116][   T72] 
[ 3589.425805][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3589.426050][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3589.426050][   T72]      dst_init+0x84/0x4a0
[ 3589.426050][   T72]      dst_alloc+0x97/0x150
[ 3589.426050][   T72]      ip6_dst_alloc+0x23/0x90
[ 3589.426050][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3589.426050][   T72]      ip6_pol_route+0x56f/0x840
[ 3589.426050][   T72]      fib6_rule_lookup+0x227/0x600
[ 3589.426050][   T72]      ip6_route_output_flags+0x251/0x460
[ 3589.426050][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3589.426050][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3589.426050][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3589.426050][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3589.426050][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3589.426050][   T72]      __sys_connect+0x217/0x2a0
[ 3589.426050][   T72]      __x64_sys_connect+0x72/0xb0
[ 3589.426050][   T72]      do_syscall_64+0xc6/0x1e0
[ 3589.426050][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3589.426050][   T72] 
[ 3599.668735][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3599.669200][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3599.669200][   T72]      netdev_get_by_index+0x5e/0x80
[ 3599.669200][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3599.669200][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3599.669200][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3599.669200][   T72]      ipv6_add_addr+0x411/0x2000
[ 3599.669200][   T72]      inet6_addr_add+0x30e/0xa40
[ 3599.669200][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3599.669200][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.669200][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.669200][   T72]      netlink_unicast+0x449/0x710
[ 3599.669200][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.669200][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.669200][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.669200][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.669200][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.669200][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.669200][   T72] 
[ 3599.671211][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3599.671211][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3599.671211][   T72]      ipv6_find_idev+0x102/0x170
[ 3599.671211][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3599.671211][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.671211][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.671211][   T72]      netlink_unicast+0x449/0x710
[ 3599.671211][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.671211][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.671211][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.671211][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.671211][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.671211][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.671211][   T72] 
[ 3599.672747][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3599.672747][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3599.672747][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3599.672747][   T72]      ipv6_find_idev+0x102/0x170
[ 3599.672747][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3599.672747][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.672747][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.672747][   T72]      netlink_unicast+0x449/0x710
[ 3599.672747][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.672747][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.672747][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.672747][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.672747][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.672747][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.672747][   T72] 
[ 3599.674441][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3599.674738][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3599.674738][   T72]      netdev_get_by_index+0x5e/0x80
[ 3599.674738][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3599.674738][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3599.674738][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3599.674738][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3599.674738][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3599.674738][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3599.674738][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3599.674738][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3599.674738][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3599.674738][   T72]      vfs_write+0x9e5/0x10a0
[ 3599.674738][   T72]      ksys_write+0xf5/0x1e0
[ 3599.674738][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.674738][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.674738][   T72] 
[ 3599.676579][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3599.676579][   T72]      netdev_get_by_index+0x5e/0x80
[ 3599.676579][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3599.676579][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3599.676579][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3599.676579][   T72]      ipv6_add_addr+0x411/0x2000
[ 3599.676579][   T72]      inet6_addr_add+0x30e/0xa40
[ 3599.676579][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3599.676579][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.676579][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.676579][   T72]      netlink_unicast+0x449/0x710
[ 3599.676579][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.676579][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.676579][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.676579][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.676579][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.676579][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.676579][   T72] 
[ 3599.678573][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3599.678573][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3599.678573][   T72]      ipv6_find_idev+0x102/0x170
[ 3599.678573][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3599.678573][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.678573][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.678573][   T72]      netlink_unicast+0x449/0x710
[ 3599.678573][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.678573][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.678573][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.678573][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.678573][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.678573][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.678573][   T72] 
[ 3599.680103][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3599.680103][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3599.680103][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3599.680103][   T72]      ipv6_find_idev+0x102/0x170
[ 3599.680103][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3599.680103][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3599.680103][   T72]      netlink_rcv_skb+0x130/0x360
[ 3599.680103][   T72]      netlink_unicast+0x449/0x710
[ 3599.680103][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3599.680103][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3599.680103][   T72]      ___sys_sendmsg+0xee/0x170
[ 3599.680103][   T72]      __sys_sendmsg+0xcd/0x170
[ 3599.680103][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.680103][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.680103][   T72] 
[ 3599.681778][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3599.682014][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3599.682014][   T72]      dst_init+0x84/0x4a0
[ 3599.682014][   T72]      dst_alloc+0x97/0x150
[ 3599.682014][   T72]      ip6_dst_alloc+0x23/0x90
[ 3599.682014][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3599.682014][   T72]      ip6_pol_route+0x56f/0x840
[ 3599.682014][   T72]      fib6_rule_lookup+0x227/0x600
[ 3599.682014][   T72]      ip6_route_output_flags+0x251/0x460
[ 3599.682014][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3599.682014][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3599.682014][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3599.682014][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3599.682014][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3599.682014][   T72]      __sys_connect+0x217/0x2a0
[ 3599.682014][   T72]      __x64_sys_connect+0x72/0xb0
[ 3599.682014][   T72]      do_syscall_64+0xc6/0x1e0
[ 3599.682014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3599.682014][   T72] 
[ 3609.836656][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3609.837099][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3609.837099][   T72]      netdev_get_by_index+0x5e/0x80
[ 3609.837099][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3609.837099][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3609.837099][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3609.837099][   T72]      ipv6_add_addr+0x411/0x2000
[ 3609.837099][   T72]      inet6_addr_add+0x30e/0xa40
[ 3609.837099][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3609.837099][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.837099][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.837099][   T72]      netlink_unicast+0x449/0x710
[ 3609.837099][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.837099][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.837099][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.837099][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.837099][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.837099][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.837099][   T72] 
[ 3609.839201][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3609.839201][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3609.839201][   T72]      ipv6_find_idev+0x102/0x170
[ 3609.839201][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3609.839201][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.839201][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.839201][   T72]      netlink_unicast+0x449/0x710
[ 3609.839201][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.839201][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.839201][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.839201][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.839201][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.839201][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.839201][   T72] 
[ 3609.840820][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3609.840820][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3609.840820][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3609.840820][   T72]      ipv6_find_idev+0x102/0x170
[ 3609.840820][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3609.840820][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.840820][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.840820][   T72]      netlink_unicast+0x449/0x710
[ 3609.840820][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.840820][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.840820][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.840820][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.840820][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.840820][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.840820][   T72] 
[ 3609.842917][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3609.843316][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3609.843316][   T72]      netdev_get_by_index+0x5e/0x80
[ 3609.843316][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3609.843316][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3609.843316][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3609.843316][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3609.843316][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3609.843316][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3609.843316][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3609.843316][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3609.843316][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3609.843316][   T72]      vfs_write+0x9e5/0x10a0
[ 3609.843316][   T72]      ksys_write+0xf5/0x1e0
[ 3609.843316][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.843316][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.843316][   T72] 
[ 3609.846228][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3609.846228][   T72]      netdev_get_by_index+0x5e/0x80
[ 3609.846228][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3609.846228][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3609.846228][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3609.846228][   T72]      ipv6_add_addr+0x411/0x2000
[ 3609.846228][   T72]      inet6_addr_add+0x30e/0xa40
[ 3609.846228][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3609.846228][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.846228][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.846228][   T72]      netlink_unicast+0x449/0x710
[ 3609.846228][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.846228][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.846228][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.846228][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.846228][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.846228][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.846228][   T72] 
[ 3609.849370][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3609.849370][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3609.849370][   T72]      ipv6_find_idev+0x102/0x170
[ 3609.849370][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3609.849370][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.849370][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.849370][   T72]      netlink_unicast+0x449/0x710
[ 3609.849370][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.849370][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.849370][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.849370][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.849370][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.849370][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.849370][   T72] 
[ 3609.851827][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3609.851827][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3609.851827][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3609.851827][   T72]      ipv6_find_idev+0x102/0x170
[ 3609.851827][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3609.851827][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3609.851827][   T72]      netlink_rcv_skb+0x130/0x360
[ 3609.851827][   T72]      netlink_unicast+0x449/0x710
[ 3609.851827][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3609.851827][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3609.851827][   T72]      ___sys_sendmsg+0xee/0x170
[ 3609.851827][   T72]      __sys_sendmsg+0xcd/0x170
[ 3609.851827][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.851827][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.851827][   T72] 
[ 3609.853645][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3609.853885][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3609.853885][   T72]      dst_init+0x84/0x4a0
[ 3609.853885][   T72]      dst_alloc+0x97/0x150
[ 3609.853885][   T72]      ip6_dst_alloc+0x23/0x90
[ 3609.853885][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3609.853885][   T72]      ip6_pol_route+0x56f/0x840
[ 3609.853885][   T72]      fib6_rule_lookup+0x227/0x600
[ 3609.853885][   T72]      ip6_route_output_flags+0x251/0x460
[ 3609.853885][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3609.853885][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3609.853885][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3609.853885][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3609.853885][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3609.853885][   T72]      __sys_connect+0x217/0x2a0
[ 3609.853885][   T72]      __x64_sys_connect+0x72/0xb0
[ 3609.853885][   T72]      do_syscall_64+0xc6/0x1e0
[ 3609.853885][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3609.853885][   T72] 
[ 3620.092685][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3620.093253][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3620.093253][   T72]      netdev_get_by_index+0x5e/0x80
[ 3620.093253][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3620.093253][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3620.093253][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3620.093253][   T72]      ipv6_add_addr+0x411/0x2000
[ 3620.093253][   T72]      inet6_addr_add+0x30e/0xa40
[ 3620.093253][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3620.093253][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.093253][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.093253][   T72]      netlink_unicast+0x449/0x710
[ 3620.093253][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.093253][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.093253][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.093253][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.093253][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.093253][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.093253][   T72] 
[ 3620.096473][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3620.096473][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3620.096473][   T72]      ipv6_find_idev+0x102/0x170
[ 3620.096473][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3620.096473][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.096473][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.096473][   T72]      netlink_unicast+0x449/0x710
[ 3620.096473][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.096473][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.096473][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.096473][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.096473][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.096473][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.096473][   T72] 
[ 3620.098892][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3620.098892][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3620.098892][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3620.098892][   T72]      ipv6_find_idev+0x102/0x170
[ 3620.098892][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3620.098892][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.098892][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.098892][   T72]      netlink_unicast+0x449/0x710
[ 3620.098892][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.098892][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.098892][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.098892][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.098892][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.098892][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.098892][   T72] 
[ 3620.101544][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3620.102010][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3620.102010][   T72]      netdev_get_by_index+0x5e/0x80
[ 3620.102010][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3620.102010][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3620.102010][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3620.102010][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3620.102010][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3620.102010][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3620.102010][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3620.102010][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3620.102010][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3620.102010][   T72]      vfs_write+0x9e5/0x10a0
[ 3620.102010][   T72]      ksys_write+0xf5/0x1e0
[ 3620.102010][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.102010][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.102010][   T72] 
[ 3620.104891][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3620.104891][   T72]      netdev_get_by_index+0x5e/0x80
[ 3620.104891][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3620.104891][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3620.104891][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3620.104891][   T72]      ipv6_add_addr+0x411/0x2000
[ 3620.104891][   T72]      inet6_addr_add+0x30e/0xa40
[ 3620.104891][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3620.104891][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.104891][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.104891][   T72]      netlink_unicast+0x449/0x710
[ 3620.104891][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.104891][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.104891][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.104891][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.104891][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.104891][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.104891][   T72] 
[ 3620.108027][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3620.108027][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3620.108027][   T72]      ipv6_find_idev+0x102/0x170
[ 3620.108027][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3620.108027][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.108027][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.108027][   T72]      netlink_unicast+0x449/0x710
[ 3620.108027][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.108027][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.108027][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.108027][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.108027][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.108027][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.108027][   T72] 
[ 3620.109698][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3620.109698][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3620.109698][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3620.109698][   T72]      ipv6_find_idev+0x102/0x170
[ 3620.109698][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3620.109698][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3620.109698][   T72]      netlink_rcv_skb+0x130/0x360
[ 3620.109698][   T72]      netlink_unicast+0x449/0x710
[ 3620.109698][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3620.109698][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3620.109698][   T72]      ___sys_sendmsg+0xee/0x170
[ 3620.109698][   T72]      __sys_sendmsg+0xcd/0x170
[ 3620.109698][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.109698][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.109698][   T72] 
[ 3620.111505][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3620.112216][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3620.112216][   T72]      dst_init+0x84/0x4a0
[ 3620.112216][   T72]      dst_alloc+0x97/0x150
[ 3620.112216][   T72]      ip6_dst_alloc+0x23/0x90
[ 3620.112216][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3620.112216][   T72]      ip6_pol_route+0x56f/0x840
[ 3620.112216][   T72]      fib6_rule_lookup+0x227/0x600
[ 3620.112216][   T72]      ip6_route_output_flags+0x251/0x460
[ 3620.112216][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3620.112216][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3620.112216][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3620.112216][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3620.112216][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3620.112216][   T72]      __sys_connect+0x217/0x2a0
[ 3620.112216][   T72]      __x64_sys_connect+0x72/0xb0
[ 3620.112216][   T72]      do_syscall_64+0xc6/0x1e0
[ 3620.112216][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3620.112216][   T72] 
[ 3630.356668][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3630.357246][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3630.357246][   T72]      netdev_get_by_index+0x5e/0x80
[ 3630.357246][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3630.357246][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3630.357246][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3630.357246][   T72]      ipv6_add_addr+0x411/0x2000
[ 3630.357246][   T72]      inet6_addr_add+0x30e/0xa40
[ 3630.357246][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3630.357246][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.357246][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.357246][   T72]      netlink_unicast+0x449/0x710
[ 3630.357246][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.357246][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.357246][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.357246][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.357246][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.357246][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.357246][   T72] 
[ 3630.359790][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3630.359790][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3630.359790][   T72]      ipv6_find_idev+0x102/0x170
[ 3630.359790][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3630.359790][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.359790][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.359790][   T72]      netlink_unicast+0x449/0x710
[ 3630.359790][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.359790][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.359790][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.359790][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.359790][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.359790][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.359790][   T72] 
[ 3630.362870][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3630.362870][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3630.362870][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3630.362870][   T72]      ipv6_find_idev+0x102/0x170
[ 3630.362870][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3630.362870][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.362870][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.362870][   T72]      netlink_unicast+0x449/0x710
[ 3630.362870][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.362870][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.362870][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.362870][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.362870][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.362870][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.362870][   T72] 
[ 3630.365541][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3630.365994][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3630.365994][   T72]      netdev_get_by_index+0x5e/0x80
[ 3630.365994][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3630.365994][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3630.365994][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3630.365994][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3630.365994][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3630.365994][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3630.365994][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3630.365994][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3630.365994][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3630.365994][   T72]      vfs_write+0x9e5/0x10a0
[ 3630.365994][   T72]      ksys_write+0xf5/0x1e0
[ 3630.365994][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.365994][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.365994][   T72] 
[ 3630.368553][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3630.368553][   T72]      netdev_get_by_index+0x5e/0x80
[ 3630.368553][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3630.368553][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3630.368553][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3630.368553][   T72]      ipv6_add_addr+0x411/0x2000
[ 3630.368553][   T72]      inet6_addr_add+0x30e/0xa40
[ 3630.368553][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3630.368553][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.368553][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.368553][   T72]      netlink_unicast+0x449/0x710
[ 3630.368553][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.368553][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.368553][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.368553][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.368553][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.368553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.368553][   T72] 
[ 3630.370856][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3630.370856][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3630.370856][   T72]      ipv6_find_idev+0x102/0x170
[ 3630.370856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3630.370856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.370856][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.370856][   T72]      netlink_unicast+0x449/0x710
[ 3630.370856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.370856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.370856][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.370856][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.370856][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.370856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.370856][   T72] 
[ 3630.372462][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3630.372462][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3630.372462][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3630.372462][   T72]      ipv6_find_idev+0x102/0x170
[ 3630.372462][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3630.372462][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3630.372462][   T72]      netlink_rcv_skb+0x130/0x360
[ 3630.372462][   T72]      netlink_unicast+0x449/0x710
[ 3630.372462][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3630.372462][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3630.372462][   T72]      ___sys_sendmsg+0xee/0x170
[ 3630.372462][   T72]      __sys_sendmsg+0xcd/0x170
[ 3630.372462][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.372462][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.372462][   T72] 
[ 3630.374187][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3630.374448][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3630.374448][   T72]      dst_init+0x84/0x4a0
[ 3630.374448][   T72]      dst_alloc+0x97/0x150
[ 3630.374448][   T72]      ip6_dst_alloc+0x23/0x90
[ 3630.374448][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3630.374448][   T72]      ip6_pol_route+0x56f/0x840
[ 3630.374448][   T72]      fib6_rule_lookup+0x227/0x600
[ 3630.374448][   T72]      ip6_route_output_flags+0x251/0x460
[ 3630.374448][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3630.374448][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3630.374448][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3630.374448][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3630.374448][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3630.374448][   T72]      __sys_connect+0x217/0x2a0
[ 3630.374448][   T72]      __x64_sys_connect+0x72/0xb0
[ 3630.374448][   T72]      do_syscall_64+0xc6/0x1e0
[ 3630.374448][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3630.374448][   T72] 
[ 3640.612698][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3640.613343][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3640.613343][   T72]      netdev_get_by_index+0x5e/0x80
[ 3640.613343][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3640.613343][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3640.613343][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3640.613343][   T72]      ipv6_add_addr+0x411/0x2000
[ 3640.613343][   T72]      inet6_addr_add+0x30e/0xa40
[ 3640.613343][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3640.613343][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.613343][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.613343][   T72]      netlink_unicast+0x449/0x710
[ 3640.613343][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.613343][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.613343][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.613343][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.613343][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.613343][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.613343][   T72] 
[ 3640.616531][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3640.616531][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3640.616531][   T72]      ipv6_find_idev+0x102/0x170
[ 3640.616531][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3640.616531][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.616531][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.616531][   T72]      netlink_unicast+0x449/0x710
[ 3640.616531][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.616531][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.616531][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.616531][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.616531][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.616531][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.616531][   T72] 
[ 3640.618840][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3640.618840][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3640.618840][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3640.618840][   T72]      ipv6_find_idev+0x102/0x170
[ 3640.618840][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3640.618840][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.618840][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.618840][   T72]      netlink_unicast+0x449/0x710
[ 3640.618840][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.618840][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.618840][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.618840][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.618840][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.618840][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.618840][   T72] 
[ 3640.621244][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3640.621656][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3640.621656][   T72]      netdev_get_by_index+0x5e/0x80
[ 3640.621656][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3640.621656][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3640.621656][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3640.621656][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3640.621656][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3640.621656][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3640.621656][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3640.621656][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3640.621656][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3640.621656][   T72]      vfs_write+0x9e5/0x10a0
[ 3640.621656][   T72]      ksys_write+0xf5/0x1e0
[ 3640.621656][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.621656][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.621656][   T72] 
[ 3640.623912][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3640.623912][   T72]      netdev_get_by_index+0x5e/0x80
[ 3640.623912][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3640.623912][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3640.623912][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3640.623912][   T72]      ipv6_add_addr+0x411/0x2000
[ 3640.623912][   T72]      inet6_addr_add+0x30e/0xa40
[ 3640.623912][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3640.623912][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.623912][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.623912][   T72]      netlink_unicast+0x449/0x710
[ 3640.623912][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.623912][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.623912][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.623912][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.623912][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.623912][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.623912][   T72] 
[ 3640.626500][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3640.626500][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3640.626500][   T72]      ipv6_find_idev+0x102/0x170
[ 3640.626500][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3640.626500][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.626500][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.626500][   T72]      netlink_unicast+0x449/0x710
[ 3640.626500][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.626500][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.626500][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.626500][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.626500][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.626500][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.626500][   T72] 
[ 3640.628422][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3640.628422][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3640.628422][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3640.628422][   T72]      ipv6_find_idev+0x102/0x170
[ 3640.628422][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3640.628422][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3640.628422][   T72]      netlink_rcv_skb+0x130/0x360
[ 3640.628422][   T72]      netlink_unicast+0x449/0x710
[ 3640.628422][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3640.628422][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3640.628422][   T72]      ___sys_sendmsg+0xee/0x170
[ 3640.628422][   T72]      __sys_sendmsg+0xcd/0x170
[ 3640.628422][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.628422][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.628422][   T72] 
[ 3640.630139][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3640.630399][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3640.630399][   T72]      dst_init+0x84/0x4a0
[ 3640.630399][   T72]      dst_alloc+0x97/0x150
[ 3640.630399][   T72]      ip6_dst_alloc+0x23/0x90
[ 3640.630399][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3640.630399][   T72]      ip6_pol_route+0x56f/0x840
[ 3640.630399][   T72]      fib6_rule_lookup+0x227/0x600
[ 3640.630399][   T72]      ip6_route_output_flags+0x251/0x460
[ 3640.630399][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3640.630399][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3640.630399][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3640.630399][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3640.630399][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3640.630399][   T72]      __sys_connect+0x217/0x2a0
[ 3640.630399][   T72]      __x64_sys_connect+0x72/0xb0
[ 3640.630399][   T72]      do_syscall_64+0xc6/0x1e0
[ 3640.630399][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3640.630399][   T72] 
[ 3650.868643][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3650.869042][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3650.869042][   T72]      netdev_get_by_index+0x5e/0x80
[ 3650.869042][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3650.869042][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3650.869042][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3650.869042][   T72]      ipv6_add_addr+0x411/0x2000
[ 3650.869042][   T72]      inet6_addr_add+0x30e/0xa40
[ 3650.869042][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3650.869042][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.869042][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.869042][   T72]      netlink_unicast+0x449/0x710
[ 3650.869042][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.869042][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.869042][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.869042][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.869042][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.869042][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.869042][   T72] 
[ 3650.871035][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3650.871035][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3650.871035][   T72]      ipv6_find_idev+0x102/0x170
[ 3650.871035][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3650.871035][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.871035][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.871035][   T72]      netlink_unicast+0x449/0x710
[ 3650.871035][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.871035][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.871035][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.871035][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.871035][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.871035][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.871035][   T72] 
[ 3650.872593][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3650.872593][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3650.872593][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3650.872593][   T72]      ipv6_find_idev+0x102/0x170
[ 3650.872593][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3650.872593][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.872593][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.872593][   T72]      netlink_unicast+0x449/0x710
[ 3650.872593][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.872593][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.872593][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.872593][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.872593][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.872593][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.872593][   T72] 
[ 3650.874285][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3650.874559][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3650.874559][   T72]      netdev_get_by_index+0x5e/0x80
[ 3650.874559][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3650.874559][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3650.874559][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3650.874559][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3650.874559][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3650.874559][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3650.874559][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3650.874559][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3650.874559][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3650.874559][   T72]      vfs_write+0x9e5/0x10a0
[ 3650.874559][   T72]      ksys_write+0xf5/0x1e0
[ 3650.874559][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.874559][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.874559][   T72] 
[ 3650.876413][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3650.876413][   T72]      netdev_get_by_index+0x5e/0x80
[ 3650.876413][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3650.876413][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3650.876413][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3650.876413][   T72]      ipv6_add_addr+0x411/0x2000
[ 3650.876413][   T72]      inet6_addr_add+0x30e/0xa40
[ 3650.876413][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3650.876413][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.876413][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.876413][   T72]      netlink_unicast+0x449/0x710
[ 3650.876413][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.876413][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.876413][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.876413][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.876413][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.876413][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.876413][   T72] 
[ 3650.878400][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3650.878400][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3650.878400][   T72]      ipv6_find_idev+0x102/0x170
[ 3650.878400][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3650.878400][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.878400][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.878400][   T72]      netlink_unicast+0x449/0x710
[ 3650.878400][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.878400][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.878400][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.878400][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.878400][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.878400][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.878400][   T72] 
[ 3650.879961][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3650.879961][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3650.879961][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3650.879961][   T72]      ipv6_find_idev+0x102/0x170
[ 3650.879961][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3650.879961][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3650.879961][   T72]      netlink_rcv_skb+0x130/0x360
[ 3650.879961][   T72]      netlink_unicast+0x449/0x710
[ 3650.879961][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3650.879961][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3650.879961][   T72]      ___sys_sendmsg+0xee/0x170
[ 3650.879961][   T72]      __sys_sendmsg+0xcd/0x170
[ 3650.879961][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.879961][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.879961][   T72] 
[ 3650.881643][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3650.881911][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3650.881911][   T72]      dst_init+0x84/0x4a0
[ 3650.881911][   T72]      dst_alloc+0x97/0x150
[ 3650.881911][   T72]      ip6_dst_alloc+0x23/0x90
[ 3650.881911][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3650.881911][   T72]      ip6_pol_route+0x56f/0x840
[ 3650.881911][   T72]      fib6_rule_lookup+0x227/0x600
[ 3650.881911][   T72]      ip6_route_output_flags+0x251/0x460
[ 3650.881911][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3650.881911][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3650.881911][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3650.881911][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3650.881911][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3650.881911][   T72]      __sys_connect+0x217/0x2a0
[ 3650.881911][   T72]      __x64_sys_connect+0x72/0xb0
[ 3650.881911][   T72]      do_syscall_64+0xc6/0x1e0
[ 3650.881911][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3650.881911][   T72] 
[ 3661.124729][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3661.125110][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3661.125110][   T72]      netdev_get_by_index+0x5e/0x80
[ 3661.125110][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3661.125110][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3661.125110][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3661.125110][   T72]      ipv6_add_addr+0x411/0x2000
[ 3661.125110][   T72]      inet6_addr_add+0x30e/0xa40
[ 3661.125110][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3661.125110][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.125110][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.125110][   T72]      netlink_unicast+0x449/0x710
[ 3661.125110][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.125110][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.125110][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.125110][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.125110][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.125110][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.125110][   T72] 
[ 3661.127211][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3661.127211][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3661.127211][   T72]      ipv6_find_idev+0x102/0x170
[ 3661.127211][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3661.127211][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.127211][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.127211][   T72]      netlink_unicast+0x449/0x710
[ 3661.127211][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.127211][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.127211][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.127211][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.127211][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.127211][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.127211][   T72] 
[ 3661.128738][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3661.128738][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3661.128738][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3661.128738][   T72]      ipv6_find_idev+0x102/0x170
[ 3661.128738][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3661.128738][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.128738][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.128738][   T72]      netlink_unicast+0x449/0x710
[ 3661.128738][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.128738][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.128738][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.128738][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.128738][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.128738][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.128738][   T72] 
[ 3661.130413][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3661.130690][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3661.130690][   T72]      netdev_get_by_index+0x5e/0x80
[ 3661.130690][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3661.130690][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3661.130690][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3661.130690][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3661.130690][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3661.130690][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3661.130690][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3661.130690][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3661.130690][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3661.130690][   T72]      vfs_write+0x9e5/0x10a0
[ 3661.130690][   T72]      ksys_write+0xf5/0x1e0
[ 3661.130690][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.130690][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.130690][   T72] 
[ 3661.133509][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3661.133509][   T72]      netdev_get_by_index+0x5e/0x80
[ 3661.133509][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3661.133509][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3661.133509][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3661.133509][   T72]      ipv6_add_addr+0x411/0x2000
[ 3661.133509][   T72]      inet6_addr_add+0x30e/0xa40
[ 3661.133509][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3661.133509][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.133509][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.133509][   T72]      netlink_unicast+0x449/0x710
[ 3661.133509][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.133509][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.133509][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.133509][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.133509][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.133509][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.133509][   T72] 
[ 3661.136811][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3661.136811][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3661.136811][   T72]      ipv6_find_idev+0x102/0x170
[ 3661.136811][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3661.136811][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.136811][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.136811][   T72]      netlink_unicast+0x449/0x710
[ 3661.136811][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.136811][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.136811][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.136811][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.136811][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.136811][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.136811][   T72] 
[ 3661.139353][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3661.139353][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3661.139353][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3661.139353][   T72]      ipv6_find_idev+0x102/0x170
[ 3661.139353][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3661.139353][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3661.139353][   T72]      netlink_rcv_skb+0x130/0x360
[ 3661.139353][   T72]      netlink_unicast+0x449/0x710
[ 3661.139353][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3661.139353][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3661.139353][   T72]      ___sys_sendmsg+0xee/0x170
[ 3661.139353][   T72]      __sys_sendmsg+0xcd/0x170
[ 3661.139353][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.139353][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.139353][   T72] 
[ 3661.142162][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3661.142553][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3661.142553][   T72]      dst_init+0x84/0x4a0
[ 3661.142553][   T72]      dst_alloc+0x97/0x150
[ 3661.142553][   T72]      ip6_dst_alloc+0x23/0x90
[ 3661.142553][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3661.142553][   T72]      ip6_pol_route+0x56f/0x840
[ 3661.142553][   T72]      fib6_rule_lookup+0x227/0x600
[ 3661.142553][   T72]      ip6_route_output_flags+0x251/0x460
[ 3661.142553][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3661.142553][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3661.142553][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3661.142553][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3661.142553][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3661.142553][   T72]      __sys_connect+0x217/0x2a0
[ 3661.142553][   T72]      __x64_sys_connect+0x72/0xb0
[ 3661.142553][   T72]      do_syscall_64+0xc6/0x1e0
[ 3661.142553][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3661.142553][   T72] 
[ 3671.388657][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3671.389133][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3671.389133][   T72]      netdev_get_by_index+0x5e/0x80
[ 3671.389133][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3671.389133][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3671.389133][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3671.389133][   T72]      ipv6_add_addr+0x411/0x2000
[ 3671.389133][   T72]      inet6_addr_add+0x30e/0xa40
[ 3671.389133][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3671.389133][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.389133][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.389133][   T72]      netlink_unicast+0x449/0x710
[ 3671.389133][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.389133][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.389133][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.389133][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.389133][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.389133][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.389133][   T72] 
[ 3671.391336][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3671.391336][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3671.391336][   T72]      ipv6_find_idev+0x102/0x170
[ 3671.391336][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3671.391336][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.391336][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.391336][   T72]      netlink_unicast+0x449/0x710
[ 3671.391336][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.391336][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.391336][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.391336][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.391336][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.391336][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.391336][   T72] 
[ 3671.394035][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3671.394035][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3671.394035][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3671.394035][   T72]      ipv6_find_idev+0x102/0x170
[ 3671.394035][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3671.394035][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.394035][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.394035][   T72]      netlink_unicast+0x449/0x710
[ 3671.394035][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.394035][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.394035][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.394035][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.394035][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.394035][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.394035][   T72] 
[ 3671.396870][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3671.397311][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3671.397311][   T72]      netdev_get_by_index+0x5e/0x80
[ 3671.397311][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3671.397311][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3671.397311][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3671.397311][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3671.397311][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3671.397311][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3671.397311][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3671.397311][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3671.397311][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3671.397311][   T72]      vfs_write+0x9e5/0x10a0
[ 3671.397311][   T72]      ksys_write+0xf5/0x1e0
[ 3671.397311][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.397311][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.397311][   T72] 
[ 3671.400340][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3671.400340][   T72]      netdev_get_by_index+0x5e/0x80
[ 3671.400340][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3671.400340][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3671.400340][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3671.400340][   T72]      ipv6_add_addr+0x411/0x2000
[ 3671.400340][   T72]      inet6_addr_add+0x30e/0xa40
[ 3671.400340][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3671.400340][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.400340][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.400340][   T72]      netlink_unicast+0x449/0x710
[ 3671.400340][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.400340][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.400340][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.400340][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.400340][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.400340][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.400340][   T72] 
[ 3671.404444][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3671.404444][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3671.404444][   T72]      ipv6_find_idev+0x102/0x170
[ 3671.404444][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3671.404444][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.404444][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.404444][   T72]      netlink_unicast+0x449/0x710
[ 3671.404444][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.404444][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.404444][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.404444][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.404444][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.404444][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.404444][   T72] 
[ 3671.406975][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3671.406975][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3671.406975][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3671.406975][   T72]      ipv6_find_idev+0x102/0x170
[ 3671.406975][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3671.406975][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3671.406975][   T72]      netlink_rcv_skb+0x130/0x360
[ 3671.406975][   T72]      netlink_unicast+0x449/0x710
[ 3671.406975][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3671.406975][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3671.406975][   T72]      ___sys_sendmsg+0xee/0x170
[ 3671.406975][   T72]      __sys_sendmsg+0xcd/0x170
[ 3671.406975][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.406975][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.406975][   T72] 
[ 3671.409755][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3671.410160][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3671.410160][   T72]      dst_init+0x84/0x4a0
[ 3671.410160][   T72]      dst_alloc+0x97/0x150
[ 3671.410160][   T72]      ip6_dst_alloc+0x23/0x90
[ 3671.410160][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3671.410160][   T72]      ip6_pol_route+0x56f/0x840
[ 3671.410160][   T72]      fib6_rule_lookup+0x227/0x600
[ 3671.410160][   T72]      ip6_route_output_flags+0x251/0x460
[ 3671.410160][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3671.410160][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3671.410160][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3671.410160][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3671.410160][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3671.410160][   T72]      __sys_connect+0x217/0x2a0
[ 3671.410160][   T72]      __x64_sys_connect+0x72/0xb0
[ 3671.410160][   T72]      do_syscall_64+0xc6/0x1e0
[ 3671.410160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3671.410160][   T72] 
[ 3681.652638][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3681.653086][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3681.653086][   T72]      netdev_get_by_index+0x5e/0x80
[ 3681.653086][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3681.653086][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3681.653086][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3681.653086][   T72]      ipv6_add_addr+0x411/0x2000
[ 3681.653086][   T72]      inet6_addr_add+0x30e/0xa40
[ 3681.653086][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3681.653086][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.653086][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.653086][   T72]      netlink_unicast+0x449/0x710
[ 3681.653086][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.653086][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.653086][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.653086][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.653086][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.653086][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.653086][   T72] 
[ 3681.655102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3681.655102][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3681.655102][   T72]      ipv6_find_idev+0x102/0x170
[ 3681.655102][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3681.655102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.655102][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.655102][   T72]      netlink_unicast+0x449/0x710
[ 3681.655102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.655102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.655102][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.655102][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.655102][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.655102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.655102][   T72] 
[ 3681.656635][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3681.656635][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3681.656635][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3681.656635][   T72]      ipv6_find_idev+0x102/0x170
[ 3681.656635][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3681.656635][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.656635][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.656635][   T72]      netlink_unicast+0x449/0x710
[ 3681.656635][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.656635][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.656635][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.656635][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.656635][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.656635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.656635][   T72] 
[ 3681.658313][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3681.658587][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3681.658587][   T72]      netdev_get_by_index+0x5e/0x80
[ 3681.658587][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3681.658587][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3681.658587][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3681.658587][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3681.658587][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3681.658587][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3681.658587][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3681.658587][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3681.658587][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3681.658587][   T72]      vfs_write+0x9e5/0x10a0
[ 3681.658587][   T72]      ksys_write+0xf5/0x1e0
[ 3681.658587][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.658587][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.658587][   T72] 
[ 3681.661582][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3681.661582][   T72]      netdev_get_by_index+0x5e/0x80
[ 3681.661582][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3681.661582][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3681.661582][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3681.661582][   T72]      ipv6_add_addr+0x411/0x2000
[ 3681.661582][   T72]      inet6_addr_add+0x30e/0xa40
[ 3681.661582][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3681.661582][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.661582][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.661582][   T72]      netlink_unicast+0x449/0x710
[ 3681.661582][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.661582][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.661582][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.661582][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.661582][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.661582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.661582][   T72] 
[ 3681.664975][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3681.664975][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3681.664975][   T72]      ipv6_find_idev+0x102/0x170
[ 3681.664975][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3681.664975][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.664975][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.664975][   T72]      netlink_unicast+0x449/0x710
[ 3681.664975][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.664975][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.664975][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.664975][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.664975][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.664975][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.664975][   T72] 
[ 3681.667520][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3681.667520][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3681.667520][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3681.667520][   T72]      ipv6_find_idev+0x102/0x170
[ 3681.667520][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3681.667520][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3681.667520][   T72]      netlink_rcv_skb+0x130/0x360
[ 3681.667520][   T72]      netlink_unicast+0x449/0x710
[ 3681.667520][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3681.667520][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3681.667520][   T72]      ___sys_sendmsg+0xee/0x170
[ 3681.667520][   T72]      __sys_sendmsg+0xcd/0x170
[ 3681.667520][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.667520][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.667520][   T72] 
[ 3681.670332][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3681.670756][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3681.670756][   T72]      dst_init+0x84/0x4a0
[ 3681.670756][   T72]      dst_alloc+0x97/0x150
[ 3681.670756][   T72]      ip6_dst_alloc+0x23/0x90
[ 3681.670756][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3681.670756][   T72]      ip6_pol_route+0x56f/0x840
[ 3681.670756][   T72]      fib6_rule_lookup+0x227/0x600
[ 3681.670756][   T72]      ip6_route_output_flags+0x251/0x460
[ 3681.670756][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3681.670756][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3681.670756][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3681.670756][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3681.670756][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3681.670756][   T72]      __sys_connect+0x217/0x2a0
[ 3681.670756][   T72]      __x64_sys_connect+0x72/0xb0
[ 3681.670756][   T72]      do_syscall_64+0xc6/0x1e0
[ 3681.670756][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3681.670756][   T72] 
[ 3691.916768][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3691.917254][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3691.917254][   T72]      netdev_get_by_index+0x5e/0x80
[ 3691.917254][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3691.917254][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3691.917254][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3691.917254][   T72]      ipv6_add_addr+0x411/0x2000
[ 3691.917254][   T72]      inet6_addr_add+0x30e/0xa40
[ 3691.917254][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3691.917254][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.917254][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.917254][   T72]      netlink_unicast+0x449/0x710
[ 3691.917254][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.917254][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.917254][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.917254][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.917254][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.917254][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.917254][   T72] 
[ 3691.919297][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3691.919297][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3691.919297][   T72]      ipv6_find_idev+0x102/0x170
[ 3691.919297][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3691.919297][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.919297][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.919297][   T72]      netlink_unicast+0x449/0x710
[ 3691.919297][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.919297][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.919297][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.919297][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.919297][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.919297][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.919297][   T72] 
[ 3691.920856][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3691.920856][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3691.920856][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3691.920856][   T72]      ipv6_find_idev+0x102/0x170
[ 3691.920856][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3691.920856][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.920856][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.920856][   T72]      netlink_unicast+0x449/0x710
[ 3691.920856][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.920856][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.920856][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.920856][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.920856][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.920856][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.920856][   T72] 
[ 3691.922577][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3691.922874][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3691.922874][   T72]      netdev_get_by_index+0x5e/0x80
[ 3691.922874][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3691.922874][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3691.922874][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3691.922874][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3691.922874][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3691.922874][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3691.922874][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3691.922874][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3691.922874][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3691.922874][   T72]      vfs_write+0x9e5/0x10a0
[ 3691.922874][   T72]      ksys_write+0xf5/0x1e0
[ 3691.922874][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.922874][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.922874][   T72] 
[ 3691.924751][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3691.924751][   T72]      netdev_get_by_index+0x5e/0x80
[ 3691.924751][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3691.924751][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3691.924751][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3691.924751][   T72]      ipv6_add_addr+0x411/0x2000
[ 3691.924751][   T72]      inet6_addr_add+0x30e/0xa40
[ 3691.924751][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3691.924751][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.924751][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.924751][   T72]      netlink_unicast+0x449/0x710
[ 3691.924751][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.924751][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.924751][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.924751][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.924751][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.924751][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.924751][   T72] 
[ 3691.926759][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3691.926759][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3691.926759][   T72]      ipv6_find_idev+0x102/0x170
[ 3691.926759][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3691.926759][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.926759][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.926759][   T72]      netlink_unicast+0x449/0x710
[ 3691.926759][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.926759][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.926759][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.926759][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.926759][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.926759][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.926759][   T72] 
[ 3691.928303][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3691.928303][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3691.928303][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3691.928303][   T72]      ipv6_find_idev+0x102/0x170
[ 3691.928303][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3691.928303][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3691.928303][   T72]      netlink_rcv_skb+0x130/0x360
[ 3691.928303][   T72]      netlink_unicast+0x449/0x710
[ 3691.928303][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3691.928303][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3691.928303][   T72]      ___sys_sendmsg+0xee/0x170
[ 3691.928303][   T72]      __sys_sendmsg+0xcd/0x170
[ 3691.928303][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.928303][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.928303][   T72] 
[ 3691.930000][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3691.930258][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3691.930258][   T72]      dst_init+0x84/0x4a0
[ 3691.930258][   T72]      dst_alloc+0x97/0x150
[ 3691.930258][   T72]      ip6_dst_alloc+0x23/0x90
[ 3691.930258][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3691.930258][   T72]      ip6_pol_route+0x56f/0x840
[ 3691.930258][   T72]      fib6_rule_lookup+0x227/0x600
[ 3691.930258][   T72]      ip6_route_output_flags+0x251/0x460
[ 3691.930258][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3691.930258][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3691.930258][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3691.930258][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3691.930258][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3691.930258][   T72]      __sys_connect+0x217/0x2a0
[ 3691.930258][   T72]      __x64_sys_connect+0x72/0xb0
[ 3691.930258][   T72]      do_syscall_64+0xc6/0x1e0
[ 3691.930258][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3691.930258][   T72] 
[ 3702.172645][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3702.173148][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3702.173148][   T72]      netdev_get_by_index+0x5e/0x80
[ 3702.173148][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3702.173148][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3702.173148][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3702.173148][   T72]      ipv6_add_addr+0x411/0x2000
[ 3702.173148][   T72]      inet6_addr_add+0x30e/0xa40
[ 3702.173148][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3702.173148][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.173148][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.173148][   T72]      netlink_unicast+0x449/0x710
[ 3702.173148][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.173148][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.173148][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.173148][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.173148][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.173148][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.173148][   T72] 
[ 3702.175421][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3702.175421][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3702.175421][   T72]      ipv6_find_idev+0x102/0x170
[ 3702.175421][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3702.175421][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.175421][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.175421][   T72]      netlink_unicast+0x449/0x710
[ 3702.175421][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.175421][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.175421][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.175421][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.175421][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.175421][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.175421][   T72] 
[ 3702.176965][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3702.176965][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3702.176965][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3702.176965][   T72]      ipv6_find_idev+0x102/0x170
[ 3702.176965][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3702.176965][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.176965][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.176965][   T72]      netlink_unicast+0x449/0x710
[ 3702.176965][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.176965][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.176965][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.176965][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.176965][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.176965][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.176965][   T72] 
[ 3702.178685][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3702.178963][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3702.178963][   T72]      netdev_get_by_index+0x5e/0x80
[ 3702.178963][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3702.178963][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3702.178963][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3702.178963][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3702.178963][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3702.178963][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3702.178963][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3702.178963][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3702.178963][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3702.178963][   T72]      vfs_write+0x9e5/0x10a0
[ 3702.178963][   T72]      ksys_write+0xf5/0x1e0
[ 3702.178963][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.178963][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.178963][   T72] 
[ 3702.180820][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3702.180820][   T72]      netdev_get_by_index+0x5e/0x80
[ 3702.180820][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3702.180820][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3702.180820][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3702.180820][   T72]      ipv6_add_addr+0x411/0x2000
[ 3702.180820][   T72]      inet6_addr_add+0x30e/0xa40
[ 3702.180820][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3702.180820][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.180820][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.180820][   T72]      netlink_unicast+0x449/0x710
[ 3702.180820][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.180820][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.180820][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.180820][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.180820][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.180820][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.180820][   T72] 
[ 3702.182839][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3702.182839][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3702.182839][   T72]      ipv6_find_idev+0x102/0x170
[ 3702.182839][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3702.182839][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.182839][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.182839][   T72]      netlink_unicast+0x449/0x710
[ 3702.182839][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.182839][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.182839][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.182839][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.182839][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.182839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.182839][   T72] 
[ 3702.184387][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3702.184387][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3702.184387][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3702.184387][   T72]      ipv6_find_idev+0x102/0x170
[ 3702.184387][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3702.184387][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3702.184387][   T72]      netlink_rcv_skb+0x130/0x360
[ 3702.184387][   T72]      netlink_unicast+0x449/0x710
[ 3702.184387][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3702.184387][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3702.184387][   T72]      ___sys_sendmsg+0xee/0x170
[ 3702.184387][   T72]      __sys_sendmsg+0xcd/0x170
[ 3702.184387][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.184387][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.184387][   T72] 
[ 3702.186063][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3702.186321][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3702.186321][   T72]      dst_init+0x84/0x4a0
[ 3702.186321][   T72]      dst_alloc+0x97/0x150
[ 3702.186321][   T72]      ip6_dst_alloc+0x23/0x90
[ 3702.186321][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3702.186321][   T72]      ip6_pol_route+0x56f/0x840
[ 3702.186321][   T72]      fib6_rule_lookup+0x227/0x600
[ 3702.186321][   T72]      ip6_route_output_flags+0x251/0x460
[ 3702.186321][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3702.186321][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3702.186321][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3702.186321][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3702.186321][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3702.186321][   T72]      __sys_connect+0x217/0x2a0
[ 3702.186321][   T72]      __x64_sys_connect+0x72/0xb0
[ 3702.186321][   T72]      do_syscall_64+0xc6/0x1e0
[ 3702.186321][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3702.186321][   T72] 
[ 3712.348702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3712.349135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3712.349135][   T72]      netdev_get_by_index+0x5e/0x80
[ 3712.349135][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3712.349135][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3712.349135][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3712.349135][   T72]      ipv6_add_addr+0x411/0x2000
[ 3712.349135][   T72]      inet6_addr_add+0x30e/0xa40
[ 3712.349135][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3712.349135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.349135][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.349135][   T72]      netlink_unicast+0x449/0x710
[ 3712.349135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.349135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.349135][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.349135][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.349135][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.349135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.349135][   T72] 
[ 3712.351166][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3712.351166][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3712.351166][   T72]      ipv6_find_idev+0x102/0x170
[ 3712.351166][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3712.351166][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.351166][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.351166][   T72]      netlink_unicast+0x449/0x710
[ 3712.351166][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.351166][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.351166][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.351166][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.351166][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.351166][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.351166][   T72] 
[ 3712.352684][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3712.352684][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3712.352684][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3712.352684][   T72]      ipv6_find_idev+0x102/0x170
[ 3712.352684][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3712.352684][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.352684][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.352684][   T72]      netlink_unicast+0x449/0x710
[ 3712.352684][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.352684][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.352684][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.352684][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.352684][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.352684][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.352684][   T72] 
[ 3712.354368][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3712.354635][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3712.354635][   T72]      netdev_get_by_index+0x5e/0x80
[ 3712.354635][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3712.354635][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3712.354635][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3712.354635][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3712.354635][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3712.354635][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3712.354635][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3712.354635][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3712.354635][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3712.354635][   T72]      vfs_write+0x9e5/0x10a0
[ 3712.354635][   T72]      ksys_write+0xf5/0x1e0
[ 3712.354635][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.354635][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.354635][   T72] 
[ 3712.356451][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3712.356451][   T72]      netdev_get_by_index+0x5e/0x80
[ 3712.356451][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3712.356451][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3712.356451][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3712.356451][   T72]      ipv6_add_addr+0x411/0x2000
[ 3712.356451][   T72]      inet6_addr_add+0x30e/0xa40
[ 3712.356451][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3712.356451][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.356451][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.356451][   T72]      netlink_unicast+0x449/0x710
[ 3712.356451][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.356451][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.356451][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.356451][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.356451][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.356451][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.356451][   T72] 
[ 3712.358440][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3712.358440][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3712.358440][   T72]      ipv6_find_idev+0x102/0x170
[ 3712.358440][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3712.358440][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.358440][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.358440][   T72]      netlink_unicast+0x449/0x710
[ 3712.358440][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.358440][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.358440][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.358440][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.358440][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.358440][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.358440][   T72] 
[ 3712.359947][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3712.359947][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3712.359947][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3712.359947][   T72]      ipv6_find_idev+0x102/0x170
[ 3712.359947][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3712.359947][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3712.359947][   T72]      netlink_rcv_skb+0x130/0x360
[ 3712.359947][   T72]      netlink_unicast+0x449/0x710
[ 3712.359947][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3712.359947][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3712.359947][   T72]      ___sys_sendmsg+0xee/0x170
[ 3712.359947][   T72]      __sys_sendmsg+0xcd/0x170
[ 3712.359947][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.359947][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.359947][   T72] 
[ 3712.361637][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3712.361889][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3712.361889][   T72]      dst_init+0x84/0x4a0
[ 3712.361889][   T72]      dst_alloc+0x97/0x150
[ 3712.361889][   T72]      ip6_dst_alloc+0x23/0x90
[ 3712.361889][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3712.361889][   T72]      ip6_pol_route+0x56f/0x840
[ 3712.361889][   T72]      fib6_rule_lookup+0x227/0x600
[ 3712.361889][   T72]      ip6_route_output_flags+0x251/0x460
[ 3712.361889][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3712.361889][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3712.361889][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3712.361889][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3712.361889][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3712.361889][   T72]      __sys_connect+0x217/0x2a0
[ 3712.361889][   T72]      __x64_sys_connect+0x72/0xb0
[ 3712.361889][   T72]      do_syscall_64+0xc6/0x1e0
[ 3712.361889][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3712.361889][   T72] 
[ 3722.404704][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3722.405165][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3722.405165][   T72]      netdev_get_by_index+0x5e/0x80
[ 3722.405165][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3722.405165][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3722.405165][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3722.405165][   T72]      ipv6_add_addr+0x411/0x2000
[ 3722.405165][   T72]      inet6_addr_add+0x30e/0xa40
[ 3722.405165][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3722.405165][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.405165][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.405165][   T72]      netlink_unicast+0x449/0x710
[ 3722.405165][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.405165][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.405165][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.405165][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.405165][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.405165][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.405165][   T72] 
[ 3722.407193][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3722.407193][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3722.407193][   T72]      ipv6_find_idev+0x102/0x170
[ 3722.407193][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3722.407193][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.407193][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.407193][   T72]      netlink_unicast+0x449/0x710
[ 3722.407193][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.407193][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.407193][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.407193][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.407193][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.407193][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.407193][   T72] 
[ 3722.408726][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3722.408726][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3722.408726][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3722.408726][   T72]      ipv6_find_idev+0x102/0x170
[ 3722.408726][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3722.408726][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.408726][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.408726][   T72]      netlink_unicast+0x449/0x710
[ 3722.408726][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.408726][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.408726][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.408726][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.408726][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.408726][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.408726][   T72] 
[ 3722.410422][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3722.410734][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3722.410734][   T72]      netdev_get_by_index+0x5e/0x80
[ 3722.410734][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3722.410734][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3722.410734][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3722.410734][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3722.410734][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3722.410734][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3722.410734][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3722.410734][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3722.410734][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3722.410734][   T72]      vfs_write+0x9e5/0x10a0
[ 3722.410734][   T72]      ksys_write+0xf5/0x1e0
[ 3722.410734][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.410734][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.410734][   T72] 
[ 3722.412582][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3722.412582][   T72]      netdev_get_by_index+0x5e/0x80
[ 3722.412582][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3722.412582][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3722.412582][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3722.412582][   T72]      ipv6_add_addr+0x411/0x2000
[ 3722.412582][   T72]      inet6_addr_add+0x30e/0xa40
[ 3722.412582][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3722.412582][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.412582][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.412582][   T72]      netlink_unicast+0x449/0x710
[ 3722.412582][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.412582][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.412582][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.412582][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.412582][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.412582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.412582][   T72] 
[ 3722.414582][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3722.414582][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3722.414582][   T72]      ipv6_find_idev+0x102/0x170
[ 3722.414582][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3722.414582][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.414582][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.414582][   T72]      netlink_unicast+0x449/0x710
[ 3722.414582][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.414582][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.414582][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.414582][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.414582][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.414582][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.414582][   T72] 
[ 3722.416114][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3722.416114][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3722.416114][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3722.416114][   T72]      ipv6_find_idev+0x102/0x170
[ 3722.416114][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3722.416114][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3722.416114][   T72]      netlink_rcv_skb+0x130/0x360
[ 3722.416114][   T72]      netlink_unicast+0x449/0x710
[ 3722.416114][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3722.416114][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3722.416114][   T72]      ___sys_sendmsg+0xee/0x170
[ 3722.416114][   T72]      __sys_sendmsg+0xcd/0x170
[ 3722.416114][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.416114][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.416114][   T72] 
[ 3722.417848][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3722.418094][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3722.418094][   T72]      dst_init+0x84/0x4a0
[ 3722.418094][   T72]      dst_alloc+0x97/0x150
[ 3722.418094][   T72]      ip6_dst_alloc+0x23/0x90
[ 3722.418094][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3722.418094][   T72]      ip6_pol_route+0x56f/0x840
[ 3722.418094][   T72]      fib6_rule_lookup+0x227/0x600
[ 3722.418094][   T72]      ip6_route_output_flags+0x251/0x460
[ 3722.418094][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3722.418094][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3722.418094][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3722.418094][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3722.418094][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3722.418094][   T72]      __sys_connect+0x217/0x2a0
[ 3722.418094][   T72]      __x64_sys_connect+0x72/0xb0
[ 3722.418094][   T72]      do_syscall_64+0xc6/0x1e0
[ 3722.418094][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3722.418094][   T72] 
[ 3732.420620][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3732.421007][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3732.421007][   T72]      netdev_get_by_index+0x5e/0x80
[ 3732.421007][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3732.421007][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3732.421007][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3732.421007][   T72]      ipv6_add_addr+0x411/0x2000
[ 3732.421007][   T72]      inet6_addr_add+0x30e/0xa40
[ 3732.421007][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3732.421007][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.421007][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.421007][   T72]      netlink_unicast+0x449/0x710
[ 3732.421007][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.421007][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.421007][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.421007][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.421007][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.421007][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.421007][   T72] 
[ 3732.423044][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3732.423044][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3732.423044][   T72]      ipv6_find_idev+0x102/0x170
[ 3732.423044][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3732.423044][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.423044][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.423044][   T72]      netlink_unicast+0x449/0x710
[ 3732.423044][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.423044][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.423044][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.423044][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.423044][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.423044][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.423044][   T72] 
[ 3732.424577][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3732.424577][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3732.424577][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3732.424577][   T72]      ipv6_find_idev+0x102/0x170
[ 3732.424577][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3732.424577][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.424577][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.424577][   T72]      netlink_unicast+0x449/0x710
[ 3732.424577][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.424577][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.424577][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.424577][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.424577][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.424577][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.424577][   T72] 
[ 3732.426264][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3732.426543][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3732.426543][   T72]      netdev_get_by_index+0x5e/0x80
[ 3732.426543][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3732.426543][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3732.426543][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3732.426543][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3732.426543][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3732.426543][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3732.426543][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3732.426543][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3732.426543][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3732.426543][   T72]      vfs_write+0x9e5/0x10a0
[ 3732.426543][   T72]      ksys_write+0xf5/0x1e0
[ 3732.426543][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.426543][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.426543][   T72] 
[ 3732.428396][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3732.428396][   T72]      netdev_get_by_index+0x5e/0x80
[ 3732.428396][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3732.428396][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3732.428396][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3732.428396][   T72]      ipv6_add_addr+0x411/0x2000
[ 3732.428396][   T72]      inet6_addr_add+0x30e/0xa40
[ 3732.428396][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3732.428396][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.428396][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.428396][   T72]      netlink_unicast+0x449/0x710
[ 3732.428396][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.428396][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.428396][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.428396][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.428396][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.428396][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.428396][   T72] 
[ 3732.430410][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3732.430410][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3732.430410][   T72]      ipv6_find_idev+0x102/0x170
[ 3732.430410][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3732.430410][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.430410][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.430410][   T72]      netlink_unicast+0x449/0x710
[ 3732.430410][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.430410][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.430410][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.430410][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.430410][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.430410][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.430410][   T72] 
[ 3732.431951][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3732.431951][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3732.431951][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3732.431951][   T72]      ipv6_find_idev+0x102/0x170
[ 3732.431951][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3732.431951][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3732.431951][   T72]      netlink_rcv_skb+0x130/0x360
[ 3732.431951][   T72]      netlink_unicast+0x449/0x710
[ 3732.431951][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3732.431951][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3732.431951][   T72]      ___sys_sendmsg+0xee/0x170
[ 3732.431951][   T72]      __sys_sendmsg+0xcd/0x170
[ 3732.431951][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.431951][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.431951][   T72] 
[ 3732.433657][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3732.433904][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3732.433904][   T72]      dst_init+0x84/0x4a0
[ 3732.433904][   T72]      dst_alloc+0x97/0x150
[ 3732.433904][   T72]      ip6_dst_alloc+0x23/0x90
[ 3732.433904][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3732.433904][   T72]      ip6_pol_route+0x56f/0x840
[ 3732.433904][   T72]      fib6_rule_lookup+0x227/0x600
[ 3732.433904][   T72]      ip6_route_output_flags+0x251/0x460
[ 3732.433904][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3732.433904][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3732.433904][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3732.433904][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3732.433904][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3732.433904][   T72]      __sys_connect+0x217/0x2a0
[ 3732.433904][   T72]      __x64_sys_connect+0x72/0xb0
[ 3732.433904][   T72]      do_syscall_64+0xc6/0x1e0
[ 3732.433904][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3732.433904][   T72] 
[ 3742.676738][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3742.677188][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3742.677188][   T72]      netdev_get_by_index+0x5e/0x80
[ 3742.677188][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3742.677188][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3742.677188][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3742.677188][   T72]      ipv6_add_addr+0x411/0x2000
[ 3742.677188][   T72]      inet6_addr_add+0x30e/0xa40
[ 3742.677188][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3742.677188][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.677188][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.677188][   T72]      netlink_unicast+0x449/0x710
[ 3742.677188][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.677188][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.677188][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.677188][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.677188][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.677188][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.677188][   T72] 
[ 3742.679223][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3742.679223][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3742.679223][   T72]      ipv6_find_idev+0x102/0x170
[ 3742.679223][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3742.679223][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.679223][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.679223][   T72]      netlink_unicast+0x449/0x710
[ 3742.679223][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.679223][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.679223][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.679223][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.679223][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.679223][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.679223][   T72] 
[ 3742.680761][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3742.680761][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3742.680761][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3742.680761][   T72]      ipv6_find_idev+0x102/0x170
[ 3742.680761][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3742.680761][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.680761][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.680761][   T72]      netlink_unicast+0x449/0x710
[ 3742.680761][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.680761][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.680761][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.680761][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.680761][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.680761][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.680761][   T72] 
[ 3742.682461][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3742.682785][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3742.682785][   T72]      netdev_get_by_index+0x5e/0x80
[ 3742.682785][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3742.682785][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3742.682785][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3742.682785][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3742.682785][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3742.682785][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3742.682785][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3742.682785][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3742.682785][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3742.682785][   T72]      vfs_write+0x9e5/0x10a0
[ 3742.682785][   T72]      ksys_write+0xf5/0x1e0
[ 3742.682785][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.682785][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.682785][   T72] 
[ 3742.684634][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3742.684634][   T72]      netdev_get_by_index+0x5e/0x80
[ 3742.684634][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3742.684634][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3742.684634][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3742.684634][   T72]      ipv6_add_addr+0x411/0x2000
[ 3742.684634][   T72]      inet6_addr_add+0x30e/0xa40
[ 3742.684634][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3742.684634][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.684634][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.684634][   T72]      netlink_unicast+0x449/0x710
[ 3742.684634][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.684634][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.684634][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.684634][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.684634][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.684634][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.684634][   T72] 
[ 3742.686613][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3742.686613][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3742.686613][   T72]      ipv6_find_idev+0x102/0x170
[ 3742.686613][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3742.686613][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.686613][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.686613][   T72]      netlink_unicast+0x449/0x710
[ 3742.686613][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.686613][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.686613][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.686613][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.686613][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.686613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.686613][   T72] 
[ 3742.688200][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3742.688200][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3742.688200][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3742.688200][   T72]      ipv6_find_idev+0x102/0x170
[ 3742.688200][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3742.688200][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3742.688200][   T72]      netlink_rcv_skb+0x130/0x360
[ 3742.688200][   T72]      netlink_unicast+0x449/0x710
[ 3742.688200][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3742.688200][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3742.688200][   T72]      ___sys_sendmsg+0xee/0x170
[ 3742.688200][   T72]      __sys_sendmsg+0xcd/0x170
[ 3742.688200][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.688200][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.688200][   T72] 
[ 3742.689881][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3742.690127][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3742.690127][   T72]      dst_init+0x84/0x4a0
[ 3742.690127][   T72]      dst_alloc+0x97/0x150
[ 3742.690127][   T72]      ip6_dst_alloc+0x23/0x90
[ 3742.690127][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3742.690127][   T72]      ip6_pol_route+0x56f/0x840
[ 3742.690127][   T72]      fib6_rule_lookup+0x227/0x600
[ 3742.690127][   T72]      ip6_route_output_flags+0x251/0x460
[ 3742.690127][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3742.690127][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3742.690127][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3742.690127][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3742.690127][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3742.690127][   T72]      __sys_connect+0x217/0x2a0
[ 3742.690127][   T72]      __x64_sys_connect+0x72/0xb0
[ 3742.690127][   T72]      do_syscall_64+0xc6/0x1e0
[ 3742.690127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3742.690127][   T72] 
[ 3752.836809][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3752.837248][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3752.837248][   T72]      netdev_get_by_index+0x5e/0x80
[ 3752.837248][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3752.837248][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3752.837248][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3752.837248][   T72]      ipv6_add_addr+0x411/0x2000
[ 3752.837248][   T72]      inet6_addr_add+0x30e/0xa40
[ 3752.837248][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3752.837248][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.837248][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.837248][   T72]      netlink_unicast+0x449/0x710
[ 3752.837248][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.837248][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.837248][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.837248][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.837248][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.837248][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.837248][   T72] 
[ 3752.839272][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3752.839272][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3752.839272][   T72]      ipv6_find_idev+0x102/0x170
[ 3752.839272][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3752.839272][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.839272][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.839272][   T72]      netlink_unicast+0x449/0x710
[ 3752.839272][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.839272][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.839272][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.839272][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.839272][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.839272][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.839272][   T72] 
[ 3752.840812][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3752.840812][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3752.840812][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3752.840812][   T72]      ipv6_find_idev+0x102/0x170
[ 3752.840812][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3752.840812][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.840812][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.840812][   T72]      netlink_unicast+0x449/0x710
[ 3752.840812][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.840812][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.840812][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.840812][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.840812][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.840812][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.840812][   T72] 
[ 3752.842530][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3752.842839][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3752.842839][   T72]      netdev_get_by_index+0x5e/0x80
[ 3752.842839][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3752.842839][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3752.842839][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3752.842839][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3752.842839][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3752.842839][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3752.842839][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3752.842839][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3752.842839][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3752.842839][   T72]      vfs_write+0x9e5/0x10a0
[ 3752.842839][   T72]      ksys_write+0xf5/0x1e0
[ 3752.842839][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.842839][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.842839][   T72] 
[ 3752.844721][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3752.844721][   T72]      netdev_get_by_index+0x5e/0x80
[ 3752.844721][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3752.844721][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3752.844721][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3752.844721][   T72]      ipv6_add_addr+0x411/0x2000
[ 3752.844721][   T72]      inet6_addr_add+0x30e/0xa40
[ 3752.844721][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3752.844721][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.844721][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.844721][   T72]      netlink_unicast+0x449/0x710
[ 3752.844721][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.844721][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.844721][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.844721][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.844721][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.844721][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.844721][   T72] 
[ 3752.846720][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3752.846720][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3752.846720][   T72]      ipv6_find_idev+0x102/0x170
[ 3752.846720][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3752.846720][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.846720][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.846720][   T72]      netlink_unicast+0x449/0x710
[ 3752.846720][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.846720][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.846720][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.846720][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.846720][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.846720][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.846720][   T72] 
[ 3752.848298][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3752.848298][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3752.848298][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3752.848298][   T72]      ipv6_find_idev+0x102/0x170
[ 3752.848298][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3752.848298][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3752.848298][   T72]      netlink_rcv_skb+0x130/0x360
[ 3752.848298][   T72]      netlink_unicast+0x449/0x710
[ 3752.848298][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3752.848298][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3752.848298][   T72]      ___sys_sendmsg+0xee/0x170
[ 3752.848298][   T72]      __sys_sendmsg+0xcd/0x170
[ 3752.848298][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.848298][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.848298][   T72] 
[ 3752.849996][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3752.850263][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3752.850263][   T72]      dst_init+0x84/0x4a0
[ 3752.850263][   T72]      dst_alloc+0x97/0x150
[ 3752.850263][   T72]      ip6_dst_alloc+0x23/0x90
[ 3752.850263][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3752.850263][   T72]      ip6_pol_route+0x56f/0x840
[ 3752.850263][   T72]      fib6_rule_lookup+0x227/0x600
[ 3752.850263][   T72]      ip6_route_output_flags+0x251/0x460
[ 3752.850263][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3752.850263][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3752.850263][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3752.850263][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3752.850263][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3752.850263][   T72]      __sys_connect+0x217/0x2a0
[ 3752.850263][   T72]      __x64_sys_connect+0x72/0xb0
[ 3752.850263][   T72]      do_syscall_64+0xc6/0x1e0
[ 3752.850263][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3752.850263][   T72] 
[ 3762.956711][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3762.957235][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3762.957235][   T72]      netdev_get_by_index+0x5e/0x80
[ 3762.957235][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3762.957235][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3762.957235][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3762.957235][   T72]      ipv6_add_addr+0x411/0x2000
[ 3762.957235][   T72]      inet6_addr_add+0x30e/0xa40
[ 3762.957235][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3762.957235][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.957235][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.957235][   T72]      netlink_unicast+0x449/0x710
[ 3762.957235][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.957235][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.957235][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.957235][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.957235][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.957235][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.957235][   T72] 
[ 3762.959264][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3762.959264][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3762.959264][   T72]      ipv6_find_idev+0x102/0x170
[ 3762.959264][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3762.959264][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.959264][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.959264][   T72]      netlink_unicast+0x449/0x710
[ 3762.959264][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.959264][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.959264][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.959264][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.959264][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.959264][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.959264][   T72] 
[ 3762.960810][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3762.960810][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3762.960810][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3762.960810][   T72]      ipv6_find_idev+0x102/0x170
[ 3762.960810][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3762.960810][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.960810][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.960810][   T72]      netlink_unicast+0x449/0x710
[ 3762.960810][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.960810][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.960810][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.960810][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.960810][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.960810][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.960810][   T72] 
[ 3762.962583][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3762.962869][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3762.962869][   T72]      netdev_get_by_index+0x5e/0x80
[ 3762.962869][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3762.962869][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3762.962869][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3762.962869][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3762.962869][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3762.962869][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3762.962869][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3762.962869][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3762.962869][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3762.962869][   T72]      vfs_write+0x9e5/0x10a0
[ 3762.962869][   T72]      ksys_write+0xf5/0x1e0
[ 3762.962869][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.962869][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.962869][   T72] 
[ 3762.964713][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3762.964713][   T72]      netdev_get_by_index+0x5e/0x80
[ 3762.964713][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3762.964713][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3762.964713][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3762.964713][   T72]      ipv6_add_addr+0x411/0x2000
[ 3762.964713][   T72]      inet6_addr_add+0x30e/0xa40
[ 3762.964713][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3762.964713][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.964713][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.964713][   T72]      netlink_unicast+0x449/0x710
[ 3762.964713][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.964713][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.964713][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.964713][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.964713][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.964713][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.964713][   T72] 
[ 3762.966708][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3762.966708][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3762.966708][   T72]      ipv6_find_idev+0x102/0x170
[ 3762.966708][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3762.966708][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.966708][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.966708][   T72]      netlink_unicast+0x449/0x710
[ 3762.966708][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.966708][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.966708][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.966708][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.966708][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.966708][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.966708][   T72] 
[ 3762.968252][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3762.968252][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3762.968252][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3762.968252][   T72]      ipv6_find_idev+0x102/0x170
[ 3762.968252][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3762.968252][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3762.968252][   T72]      netlink_rcv_skb+0x130/0x360
[ 3762.968252][   T72]      netlink_unicast+0x449/0x710
[ 3762.968252][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3762.968252][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3762.968252][   T72]      ___sys_sendmsg+0xee/0x170
[ 3762.968252][   T72]      __sys_sendmsg+0xcd/0x170
[ 3762.968252][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.968252][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.968252][   T72] 
[ 3762.969936][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3762.970174][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3762.970174][   T72]      dst_init+0x84/0x4a0
[ 3762.970174][   T72]      dst_alloc+0x97/0x150
[ 3762.970174][   T72]      ip6_dst_alloc+0x23/0x90
[ 3762.970174][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3762.970174][   T72]      ip6_pol_route+0x56f/0x840
[ 3762.970174][   T72]      fib6_rule_lookup+0x227/0x600
[ 3762.970174][   T72]      ip6_route_output_flags+0x251/0x460
[ 3762.970174][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3762.970174][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3762.970174][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3762.970174][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3762.970174][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3762.970174][   T72]      __sys_connect+0x217/0x2a0
[ 3762.970174][   T72]      __x64_sys_connect+0x72/0xb0
[ 3762.970174][   T72]      do_syscall_64+0xc6/0x1e0
[ 3762.970174][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3762.970174][   T72] 
[ 3773.220733][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3773.221202][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3773.221202][   T72]      netdev_get_by_index+0x5e/0x80
[ 3773.221202][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3773.221202][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3773.221202][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3773.221202][   T72]      ipv6_add_addr+0x411/0x2000
[ 3773.221202][   T72]      inet6_addr_add+0x30e/0xa40
[ 3773.221202][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3773.221202][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.221202][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.221202][   T72]      netlink_unicast+0x449/0x710
[ 3773.221202][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.221202][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.221202][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.221202][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.221202][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.221202][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.221202][   T72] 
[ 3773.223219][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3773.223219][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3773.223219][   T72]      ipv6_find_idev+0x102/0x170
[ 3773.223219][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3773.223219][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.223219][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.223219][   T72]      netlink_unicast+0x449/0x710
[ 3773.223219][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.223219][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.223219][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.223219][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.223219][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.223219][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.223219][   T72] 
[ 3773.224760][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3773.224760][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3773.224760][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3773.224760][   T72]      ipv6_find_idev+0x102/0x170
[ 3773.224760][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3773.224760][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.224760][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.224760][   T72]      netlink_unicast+0x449/0x710
[ 3773.224760][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.224760][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.224760][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.224760][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.224760][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.224760][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.224760][   T72] 
[ 3773.226450][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3773.226724][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3773.226724][   T72]      netdev_get_by_index+0x5e/0x80
[ 3773.226724][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3773.226724][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3773.226724][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3773.226724][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3773.226724][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3773.226724][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3773.226724][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3773.226724][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3773.226724][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3773.226724][   T72]      vfs_write+0x9e5/0x10a0
[ 3773.226724][   T72]      ksys_write+0xf5/0x1e0
[ 3773.226724][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.226724][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.226724][   T72] 
[ 3773.228560][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3773.228560][   T72]      netdev_get_by_index+0x5e/0x80
[ 3773.228560][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3773.228560][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3773.228560][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3773.228560][   T72]      ipv6_add_addr+0x411/0x2000
[ 3773.228560][   T72]      inet6_addr_add+0x30e/0xa40
[ 3773.228560][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3773.228560][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.228560][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.228560][   T72]      netlink_unicast+0x449/0x710
[ 3773.228560][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.228560][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.228560][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.228560][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.228560][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.228560][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.228560][   T72] 
[ 3773.230545][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3773.230545][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3773.230545][   T72]      ipv6_find_idev+0x102/0x170
[ 3773.230545][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3773.230545][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.230545][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.230545][   T72]      netlink_unicast+0x449/0x710
[ 3773.230545][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.230545][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.230545][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.230545][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.230545][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.230545][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.230545][   T72] 
[ 3773.232083][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3773.232083][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3773.232083][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3773.232083][   T72]      ipv6_find_idev+0x102/0x170
[ 3773.232083][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3773.232083][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3773.232083][   T72]      netlink_rcv_skb+0x130/0x360
[ 3773.232083][   T72]      netlink_unicast+0x449/0x710
[ 3773.232083][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3773.232083][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3773.232083][   T72]      ___sys_sendmsg+0xee/0x170
[ 3773.232083][   T72]      __sys_sendmsg+0xcd/0x170
[ 3773.232083][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.232083][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.232083][   T72] 
[ 3773.233775][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3773.234014][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3773.234014][   T72]      dst_init+0x84/0x4a0
[ 3773.234014][   T72]      dst_alloc+0x97/0x150
[ 3773.234014][   T72]      ip6_dst_alloc+0x23/0x90
[ 3773.234014][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3773.234014][   T72]      ip6_pol_route+0x56f/0x840
[ 3773.234014][   T72]      fib6_rule_lookup+0x227/0x600
[ 3773.234014][   T72]      ip6_route_output_flags+0x251/0x460
[ 3773.234014][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3773.234014][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3773.234014][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3773.234014][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3773.234014][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3773.234014][   T72]      __sys_connect+0x217/0x2a0
[ 3773.234014][   T72]      __x64_sys_connect+0x72/0xb0
[ 3773.234014][   T72]      do_syscall_64+0xc6/0x1e0
[ 3773.234014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3773.234014][   T72] 
[ 3783.236671][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3783.237134][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3783.237134][   T72]      netdev_get_by_index+0x5e/0x80
[ 3783.237134][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3783.237134][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3783.237134][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3783.237134][   T72]      ipv6_add_addr+0x411/0x2000
[ 3783.237134][   T72]      inet6_addr_add+0x30e/0xa40
[ 3783.237134][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3783.237134][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.237134][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.237134][   T72]      netlink_unicast+0x449/0x710
[ 3783.237134][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.237134][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.237134][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.237134][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.237134][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.237134][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.237134][   T72] 
[ 3783.239147][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3783.239147][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3783.239147][   T72]      ipv6_find_idev+0x102/0x170
[ 3783.239147][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3783.239147][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.239147][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.239147][   T72]      netlink_unicast+0x449/0x710
[ 3783.239147][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.239147][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.239147][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.239147][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.239147][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.239147][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.239147][   T72] 
[ 3783.240698][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3783.240698][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3783.240698][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3783.240698][   T72]      ipv6_find_idev+0x102/0x170
[ 3783.240698][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3783.240698][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.240698][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.240698][   T72]      netlink_unicast+0x449/0x710
[ 3783.240698][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.240698][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.240698][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.240698][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.240698][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.240698][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.240698][   T72] 
[ 3783.242369][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3783.242659][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3783.242659][   T72]      netdev_get_by_index+0x5e/0x80
[ 3783.242659][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3783.242659][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3783.242659][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3783.242659][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3783.242659][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3783.242659][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3783.242659][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3783.242659][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3783.242659][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3783.242659][   T72]      vfs_write+0x9e5/0x10a0
[ 3783.242659][   T72]      ksys_write+0xf5/0x1e0
[ 3783.242659][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.242659][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.242659][   T72] 
[ 3783.244851][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3783.244851][   T72]      netdev_get_by_index+0x5e/0x80
[ 3783.244851][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3783.244851][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3783.244851][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3783.244851][   T72]      ipv6_add_addr+0x411/0x2000
[ 3783.244851][   T72]      inet6_addr_add+0x30e/0xa40
[ 3783.244851][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3783.244851][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.244851][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.244851][   T72]      netlink_unicast+0x449/0x710
[ 3783.244851][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.244851][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.244851][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.244851][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.244851][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.244851][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.244851][   T72] 
[ 3783.246813][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3783.246813][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3783.246813][   T72]      ipv6_find_idev+0x102/0x170
[ 3783.246813][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3783.246813][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.246813][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.246813][   T72]      netlink_unicast+0x449/0x710
[ 3783.246813][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.246813][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.246813][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.246813][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.246813][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.246813][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.246813][   T72] 
[ 3783.248328][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3783.248328][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3783.248328][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3783.248328][   T72]      ipv6_find_idev+0x102/0x170
[ 3783.248328][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3783.248328][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3783.248328][   T72]      netlink_rcv_skb+0x130/0x360
[ 3783.248328][   T72]      netlink_unicast+0x449/0x710
[ 3783.248328][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3783.248328][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3783.248328][   T72]      ___sys_sendmsg+0xee/0x170
[ 3783.248328][   T72]      __sys_sendmsg+0xcd/0x170
[ 3783.248328][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.248328][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.248328][   T72] 
[ 3783.250000][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3783.250240][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3783.250240][   T72]      dst_init+0x84/0x4a0
[ 3783.250240][   T72]      dst_alloc+0x97/0x150
[ 3783.250240][   T72]      ip6_dst_alloc+0x23/0x90
[ 3783.250240][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3783.250240][   T72]      ip6_pol_route+0x56f/0x840
[ 3783.250240][   T72]      fib6_rule_lookup+0x227/0x600
[ 3783.250240][   T72]      ip6_route_output_flags+0x251/0x460
[ 3783.250240][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3783.250240][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3783.250240][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3783.250240][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3783.250240][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3783.250240][   T72]      __sys_connect+0x217/0x2a0
[ 3783.250240][   T72]      __x64_sys_connect+0x72/0xb0
[ 3783.250240][   T72]      do_syscall_64+0xc6/0x1e0
[ 3783.250240][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3783.250240][   T72] 
[ 3793.492650][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3793.493075][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3793.493075][   T72]      netdev_get_by_index+0x5e/0x80
[ 3793.493075][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3793.493075][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3793.493075][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3793.493075][   T72]      ipv6_add_addr+0x411/0x2000
[ 3793.493075][   T72]      inet6_addr_add+0x30e/0xa40
[ 3793.493075][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3793.493075][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.493075][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.493075][   T72]      netlink_unicast+0x449/0x710
[ 3793.493075][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.493075][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.493075][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.493075][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.493075][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.493075][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.493075][   T72] 
[ 3793.495081][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3793.495081][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3793.495081][   T72]      ipv6_find_idev+0x102/0x170
[ 3793.495081][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3793.495081][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.495081][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.495081][   T72]      netlink_unicast+0x449/0x710
[ 3793.495081][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.495081][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.495081][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.495081][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.495081][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.495081][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.495081][   T72] 
[ 3793.496711][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3793.496711][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3793.496711][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3793.496711][   T72]      ipv6_find_idev+0x102/0x170
[ 3793.496711][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3793.496711][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.496711][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.496711][   T72]      netlink_unicast+0x449/0x710
[ 3793.496711][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.496711][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.496711][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.496711][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.496711][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.496711][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.496711][   T72] 
[ 3793.498377][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3793.498655][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3793.498655][   T72]      netdev_get_by_index+0x5e/0x80
[ 3793.498655][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3793.498655][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3793.498655][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3793.498655][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3793.498655][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3793.498655][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3793.498655][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3793.498655][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3793.498655][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3793.498655][   T72]      vfs_write+0x9e5/0x10a0
[ 3793.498655][   T72]      ksys_write+0xf5/0x1e0
[ 3793.498655][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.498655][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.498655][   T72] 
[ 3793.500481][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3793.500481][   T72]      netdev_get_by_index+0x5e/0x80
[ 3793.500481][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3793.500481][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3793.500481][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3793.500481][   T72]      ipv6_add_addr+0x411/0x2000
[ 3793.500481][   T72]      inet6_addr_add+0x30e/0xa40
[ 3793.500481][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3793.500481][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.500481][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.500481][   T72]      netlink_unicast+0x449/0x710
[ 3793.500481][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.500481][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.500481][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.500481][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.500481][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.500481][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.500481][   T72] 
[ 3793.502450][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3793.502450][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3793.502450][   T72]      ipv6_find_idev+0x102/0x170
[ 3793.502450][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3793.502450][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.502450][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.502450][   T72]      netlink_unicast+0x449/0x710
[ 3793.502450][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.502450][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.502450][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.502450][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.502450][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.502450][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.502450][   T72] 
[ 3793.503980][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3793.503980][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3793.503980][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3793.503980][   T72]      ipv6_find_idev+0x102/0x170
[ 3793.503980][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3793.503980][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3793.503980][   T72]      netlink_rcv_skb+0x130/0x360
[ 3793.503980][   T72]      netlink_unicast+0x449/0x710
[ 3793.503980][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3793.503980][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3793.503980][   T72]      ___sys_sendmsg+0xee/0x170
[ 3793.503980][   T72]      __sys_sendmsg+0xcd/0x170
[ 3793.503980][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.503980][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.503980][   T72] 
[ 3793.505653][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3793.505897][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3793.505897][   T72]      dst_init+0x84/0x4a0
[ 3793.505897][   T72]      dst_alloc+0x97/0x150
[ 3793.505897][   T72]      ip6_dst_alloc+0x23/0x90
[ 3793.505897][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3793.505897][   T72]      ip6_pol_route+0x56f/0x840
[ 3793.505897][   T72]      fib6_rule_lookup+0x227/0x600
[ 3793.505897][   T72]      ip6_route_output_flags+0x251/0x460
[ 3793.505897][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3793.505897][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3793.505897][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3793.505897][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3793.505897][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3793.505897][   T72]      __sys_connect+0x217/0x2a0
[ 3793.505897][   T72]      __x64_sys_connect+0x72/0xb0
[ 3793.505897][   T72]      do_syscall_64+0xc6/0x1e0
[ 3793.505897][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3793.505897][   T72] 
[ 3803.748734][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3803.749188][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3803.749188][   T72]      netdev_get_by_index+0x5e/0x80
[ 3803.749188][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3803.749188][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3803.749188][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3803.749188][   T72]      ipv6_add_addr+0x411/0x2000
[ 3803.749188][   T72]      inet6_addr_add+0x30e/0xa40
[ 3803.749188][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3803.749188][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.749188][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.749188][   T72]      netlink_unicast+0x449/0x710
[ 3803.749188][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.749188][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.749188][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.749188][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.749188][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.749188][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.749188][   T72] 
[ 3803.751187][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3803.751187][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3803.751187][   T72]      ipv6_find_idev+0x102/0x170
[ 3803.751187][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3803.751187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.751187][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.751187][   T72]      netlink_unicast+0x449/0x710
[ 3803.751187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.751187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.751187][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.751187][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.751187][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.751187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.751187][   T72] 
[ 3803.752721][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3803.752721][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3803.752721][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3803.752721][   T72]      ipv6_find_idev+0x102/0x170
[ 3803.752721][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3803.752721][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.752721][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.752721][   T72]      netlink_unicast+0x449/0x710
[ 3803.752721][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.752721][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.752721][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.752721][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.752721][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.752721][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.752721][   T72] 
[ 3803.754397][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3803.754676][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3803.754676][   T72]      netdev_get_by_index+0x5e/0x80
[ 3803.754676][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3803.754676][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3803.754676][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3803.754676][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3803.754676][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3803.754676][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3803.754676][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3803.754676][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3803.754676][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3803.754676][   T72]      vfs_write+0x9e5/0x10a0
[ 3803.754676][   T72]      ksys_write+0xf5/0x1e0
[ 3803.754676][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.754676][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.754676][   T72] 
[ 3803.756500][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3803.756500][   T72]      netdev_get_by_index+0x5e/0x80
[ 3803.756500][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3803.756500][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3803.756500][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3803.756500][   T72]      ipv6_add_addr+0x411/0x2000
[ 3803.756500][   T72]      inet6_addr_add+0x30e/0xa40
[ 3803.756500][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3803.756500][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.756500][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.756500][   T72]      netlink_unicast+0x449/0x710
[ 3803.756500][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.756500][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.756500][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.756500][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.756500][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.756500][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.756500][   T72] 
[ 3803.758463][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3803.758463][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3803.758463][   T72]      ipv6_find_idev+0x102/0x170
[ 3803.758463][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3803.758463][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.758463][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.758463][   T72]      netlink_unicast+0x449/0x710
[ 3803.758463][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.758463][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.758463][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.758463][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.758463][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.758463][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.758463][   T72] 
[ 3803.759977][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3803.759977][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3803.759977][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3803.759977][   T72]      ipv6_find_idev+0x102/0x170
[ 3803.759977][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3803.759977][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3803.759977][   T72]      netlink_rcv_skb+0x130/0x360
[ 3803.759977][   T72]      netlink_unicast+0x449/0x710
[ 3803.759977][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3803.759977][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3803.759977][   T72]      ___sys_sendmsg+0xee/0x170
[ 3803.759977][   T72]      __sys_sendmsg+0xcd/0x170
[ 3803.759977][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.759977][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.759977][   T72] 
[ 3803.761638][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3803.761880][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3803.761880][   T72]      dst_init+0x84/0x4a0
[ 3803.761880][   T72]      dst_alloc+0x97/0x150
[ 3803.761880][   T72]      ip6_dst_alloc+0x23/0x90
[ 3803.761880][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3803.761880][   T72]      ip6_pol_route+0x56f/0x840
[ 3803.761880][   T72]      fib6_rule_lookup+0x227/0x600
[ 3803.761880][   T72]      ip6_route_output_flags+0x251/0x460
[ 3803.761880][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3803.761880][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3803.761880][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3803.761880][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3803.761880][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3803.761880][   T72]      __sys_connect+0x217/0x2a0
[ 3803.761880][   T72]      __x64_sys_connect+0x72/0xb0
[ 3803.761880][   T72]      do_syscall_64+0xc6/0x1e0
[ 3803.761880][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3803.761880][   T72] 
[ 3814.004671][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3814.005072][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3814.005072][   T72]      netdev_get_by_index+0x5e/0x80
[ 3814.005072][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3814.005072][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3814.005072][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3814.005072][   T72]      ipv6_add_addr+0x411/0x2000
[ 3814.005072][   T72]      inet6_addr_add+0x30e/0xa40
[ 3814.005072][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3814.005072][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.005072][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.005072][   T72]      netlink_unicast+0x449/0x710
[ 3814.005072][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.005072][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.005072][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.005072][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.005072][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.005072][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.005072][   T72] 
[ 3814.007064][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3814.007064][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3814.007064][   T72]      ipv6_find_idev+0x102/0x170
[ 3814.007064][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3814.007064][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.007064][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.007064][   T72]      netlink_unicast+0x449/0x710
[ 3814.007064][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.007064][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.007064][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.007064][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.007064][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.007064][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.007064][   T72] 
[ 3814.008586][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3814.008586][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3814.008586][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3814.008586][   T72]      ipv6_find_idev+0x102/0x170
[ 3814.008586][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3814.008586][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.008586][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.008586][   T72]      netlink_unicast+0x449/0x710
[ 3814.008586][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.008586][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.008586][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.008586][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.008586][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.008586][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.008586][   T72] 
[ 3814.010249][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3814.010511][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3814.010511][   T72]      netdev_get_by_index+0x5e/0x80
[ 3814.010511][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3814.010511][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3814.010511][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3814.010511][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3814.010511][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3814.010511][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3814.010511][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3814.010511][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3814.010511][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3814.010511][   T72]      vfs_write+0x9e5/0x10a0
[ 3814.010511][   T72]      ksys_write+0xf5/0x1e0
[ 3814.010511][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.010511][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.010511][   T72] 
[ 3814.012359][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3814.012359][   T72]      netdev_get_by_index+0x5e/0x80
[ 3814.012359][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3814.012359][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3814.012359][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3814.012359][   T72]      ipv6_add_addr+0x411/0x2000
[ 3814.012359][   T72]      inet6_addr_add+0x30e/0xa40
[ 3814.012359][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3814.012359][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.012359][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.012359][   T72]      netlink_unicast+0x449/0x710
[ 3814.012359][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.012359][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.012359][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.012359][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.012359][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.012359][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.012359][   T72] 
[ 3814.014330][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3814.014330][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3814.014330][   T72]      ipv6_find_idev+0x102/0x170
[ 3814.014330][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3814.014330][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.014330][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.014330][   T72]      netlink_unicast+0x449/0x710
[ 3814.014330][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.014330][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.014330][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.014330][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.014330][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.014330][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.014330][   T72] 
[ 3814.015841][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3814.015841][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3814.015841][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3814.015841][   T72]      ipv6_find_idev+0x102/0x170
[ 3814.015841][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3814.015841][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3814.015841][   T72]      netlink_rcv_skb+0x130/0x360
[ 3814.015841][   T72]      netlink_unicast+0x449/0x710
[ 3814.015841][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3814.015841][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3814.015841][   T72]      ___sys_sendmsg+0xee/0x170
[ 3814.015841][   T72]      __sys_sendmsg+0xcd/0x170
[ 3814.015841][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.015841][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.015841][   T72] 
[ 3814.017507][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3814.017754][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3814.017754][   T72]      dst_init+0x84/0x4a0
[ 3814.017754][   T72]      dst_alloc+0x97/0x150
[ 3814.017754][   T72]      ip6_dst_alloc+0x23/0x90
[ 3814.017754][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3814.017754][   T72]      ip6_pol_route+0x56f/0x840
[ 3814.017754][   T72]      fib6_rule_lookup+0x227/0x600
[ 3814.017754][   T72]      ip6_route_output_flags+0x251/0x460
[ 3814.017754][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3814.017754][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3814.017754][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3814.017754][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3814.017754][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3814.017754][   T72]      __sys_connect+0x217/0x2a0
[ 3814.017754][   T72]      __x64_sys_connect+0x72/0xb0
[ 3814.017754][   T72]      do_syscall_64+0xc6/0x1e0
[ 3814.017754][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3814.017754][   T72] 
[ 3824.260744][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3824.261213][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3824.261213][   T72]      netdev_get_by_index+0x5e/0x80
[ 3824.261213][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3824.261213][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3824.261213][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3824.261213][   T72]      ipv6_add_addr+0x411/0x2000
[ 3824.261213][   T72]      inet6_addr_add+0x30e/0xa40
[ 3824.261213][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3824.261213][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.261213][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.261213][   T72]      netlink_unicast+0x449/0x710
[ 3824.261213][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.261213][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.261213][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.261213][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.261213][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.261213][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.261213][   T72] 
[ 3824.263219][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3824.263219][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3824.263219][   T72]      ipv6_find_idev+0x102/0x170
[ 3824.263219][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3824.263219][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.263219][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.263219][   T72]      netlink_unicast+0x449/0x710
[ 3824.263219][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.263219][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.263219][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.263219][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.263219][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.263219][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.263219][   T72] 
[ 3824.264755][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3824.264755][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3824.264755][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3824.264755][   T72]      ipv6_find_idev+0x102/0x170
[ 3824.264755][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3824.264755][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.264755][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.264755][   T72]      netlink_unicast+0x449/0x710
[ 3824.264755][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.264755][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.264755][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.264755][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.264755][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.264755][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.264755][   T72] 
[ 3824.266448][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3824.266774][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3824.266774][   T72]      netdev_get_by_index+0x5e/0x80
[ 3824.266774][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3824.266774][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3824.266774][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3824.266774][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3824.266774][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3824.266774][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3824.266774][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3824.266774][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3824.266774][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3824.266774][   T72]      vfs_write+0x9e5/0x10a0
[ 3824.266774][   T72]      ksys_write+0xf5/0x1e0
[ 3824.266774][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.266774][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.266774][   T72] 
[ 3824.268610][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3824.268610][   T72]      netdev_get_by_index+0x5e/0x80
[ 3824.268610][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3824.268610][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3824.268610][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3824.268610][   T72]      ipv6_add_addr+0x411/0x2000
[ 3824.268610][   T72]      inet6_addr_add+0x30e/0xa40
[ 3824.268610][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3824.268610][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.268610][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.268610][   T72]      netlink_unicast+0x449/0x710
[ 3824.268610][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.268610][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.268610][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.268610][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.268610][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.268610][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.268610][   T72] 
[ 3824.270598][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3824.270598][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3824.270598][   T72]      ipv6_find_idev+0x102/0x170
[ 3824.270598][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3824.270598][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.270598][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.270598][   T72]      netlink_unicast+0x449/0x710
[ 3824.270598][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.270598][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.270598][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.270598][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.270598][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.270598][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.270598][   T72] 
[ 3824.272131][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3824.272131][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3824.272131][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3824.272131][   T72]      ipv6_find_idev+0x102/0x170
[ 3824.272131][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3824.272131][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3824.272131][   T72]      netlink_rcv_skb+0x130/0x360
[ 3824.272131][   T72]      netlink_unicast+0x449/0x710
[ 3824.272131][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3824.272131][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3824.272131][   T72]      ___sys_sendmsg+0xee/0x170
[ 3824.272131][   T72]      __sys_sendmsg+0xcd/0x170
[ 3824.272131][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.272131][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.272131][   T72] 
[ 3824.273820][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3824.274062][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3824.274062][   T72]      dst_init+0x84/0x4a0
[ 3824.274062][   T72]      dst_alloc+0x97/0x150
[ 3824.274062][   T72]      ip6_dst_alloc+0x23/0x90
[ 3824.274062][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3824.274062][   T72]      ip6_pol_route+0x56f/0x840
[ 3824.274062][   T72]      fib6_rule_lookup+0x227/0x600
[ 3824.274062][   T72]      ip6_route_output_flags+0x251/0x460
[ 3824.274062][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3824.274062][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3824.274062][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3824.274062][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3824.274062][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3824.274062][   T72]      __sys_connect+0x217/0x2a0
[ 3824.274062][   T72]      __x64_sys_connect+0x72/0xb0
[ 3824.274062][   T72]      do_syscall_64+0xc6/0x1e0
[ 3824.274062][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3824.274062][   T72] 
[ 3834.516708][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3834.517276][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3834.517276][   T72]      netdev_get_by_index+0x5e/0x80
[ 3834.517276][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3834.517276][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3834.517276][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3834.517276][   T72]      ipv6_add_addr+0x411/0x2000
[ 3834.517276][   T72]      inet6_addr_add+0x30e/0xa40
[ 3834.517276][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3834.517276][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.517276][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.517276][   T72]      netlink_unicast+0x449/0x710
[ 3834.517276][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.517276][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.517276][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.517276][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.517276][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.517276][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.517276][   T72] 
[ 3834.520242][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3834.520242][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3834.520242][   T72]      ipv6_find_idev+0x102/0x170
[ 3834.520242][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3834.520242][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.520242][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.520242][   T72]      netlink_unicast+0x449/0x710
[ 3834.520242][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.520242][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.520242][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.520242][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.520242][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.520242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.520242][   T72] 
[ 3834.522638][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3834.522638][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3834.522638][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3834.522638][   T72]      ipv6_find_idev+0x102/0x170
[ 3834.522638][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3834.522638][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.522638][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.522638][   T72]      netlink_unicast+0x449/0x710
[ 3834.522638][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.522638][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.522638][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.522638][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.522638][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.522638][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.522638][   T72] 
[ 3834.525276][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3834.525722][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3834.525722][   T72]      netdev_get_by_index+0x5e/0x80
[ 3834.525722][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3834.525722][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3834.525722][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3834.525722][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3834.525722][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3834.525722][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3834.525722][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3834.525722][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3834.525722][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3834.525722][   T72]      vfs_write+0x9e5/0x10a0
[ 3834.525722][   T72]      ksys_write+0xf5/0x1e0
[ 3834.525722][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.525722][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.525722][   T72] 
[ 3834.528605][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3834.528605][   T72]      netdev_get_by_index+0x5e/0x80
[ 3834.528605][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3834.528605][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3834.528605][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3834.528605][   T72]      ipv6_add_addr+0x411/0x2000
[ 3834.528605][   T72]      inet6_addr_add+0x30e/0xa40
[ 3834.528605][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3834.528605][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.528605][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.528605][   T72]      netlink_unicast+0x449/0x710
[ 3834.528605][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.528605][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.528605][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.528605][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.528605][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.528605][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.528605][   T72] 
[ 3834.531619][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3834.531619][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3834.531619][   T72]      ipv6_find_idev+0x102/0x170
[ 3834.531619][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3834.531619][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.531619][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.531619][   T72]      netlink_unicast+0x449/0x710
[ 3834.531619][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.531619][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.531619][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.531619][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.531619][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.531619][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.531619][   T72] 
[ 3834.534096][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3834.534096][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3834.534096][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3834.534096][   T72]      ipv6_find_idev+0x102/0x170
[ 3834.534096][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3834.534096][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3834.534096][   T72]      netlink_rcv_skb+0x130/0x360
[ 3834.534096][   T72]      netlink_unicast+0x449/0x710
[ 3834.534096][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3834.534096][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3834.534096][   T72]      ___sys_sendmsg+0xee/0x170
[ 3834.534096][   T72]      __sys_sendmsg+0xcd/0x170
[ 3834.534096][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.534096][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.534096][   T72] 
[ 3834.536762][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3834.537146][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3834.537146][   T72]      dst_init+0x84/0x4a0
[ 3834.537146][   T72]      dst_alloc+0x97/0x150
[ 3834.537146][   T72]      ip6_dst_alloc+0x23/0x90
[ 3834.537146][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3834.537146][   T72]      ip6_pol_route+0x56f/0x840
[ 3834.537146][   T72]      fib6_rule_lookup+0x227/0x600
[ 3834.537146][   T72]      ip6_route_output_flags+0x251/0x460
[ 3834.537146][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3834.537146][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3834.537146][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3834.537146][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3834.537146][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3834.537146][   T72]      __sys_connect+0x217/0x2a0
[ 3834.537146][   T72]      __x64_sys_connect+0x72/0xb0
[ 3834.537146][   T72]      do_syscall_64+0xc6/0x1e0
[ 3834.537146][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3834.537146][   T72] 
[ 3844.644737][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3844.645191][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3844.645191][   T72]      netdev_get_by_index+0x5e/0x80
[ 3844.645191][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3844.645191][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3844.645191][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3844.645191][   T72]      ipv6_add_addr+0x411/0x2000
[ 3844.645191][   T72]      inet6_addr_add+0x30e/0xa40
[ 3844.645191][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3844.645191][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.645191][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.645191][   T72]      netlink_unicast+0x449/0x710
[ 3844.645191][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.645191][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.645191][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.645191][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.645191][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.645191][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.645191][   T72] 
[ 3844.647211][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3844.647211][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3844.647211][   T72]      ipv6_find_idev+0x102/0x170
[ 3844.647211][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3844.647211][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.647211][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.647211][   T72]      netlink_unicast+0x449/0x710
[ 3844.647211][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.647211][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.647211][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.647211][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.647211][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.647211][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.647211][   T72] 
[ 3844.648736][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3844.648736][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3844.648736][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3844.648736][   T72]      ipv6_find_idev+0x102/0x170
[ 3844.648736][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3844.648736][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.648736][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.648736][   T72]      netlink_unicast+0x449/0x710
[ 3844.648736][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.648736][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.648736][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.648736][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.648736][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.648736][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.648736][   T72] 
[ 3844.650411][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3844.650685][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3844.650685][   T72]      netdev_get_by_index+0x5e/0x80
[ 3844.650685][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3844.650685][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3844.650685][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3844.650685][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3844.650685][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3844.650685][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3844.650685][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3844.650685][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3844.650685][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3844.650685][   T72]      vfs_write+0x9e5/0x10a0
[ 3844.650685][   T72]      ksys_write+0xf5/0x1e0
[ 3844.650685][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.650685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.650685][   T72] 
[ 3844.652534][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3844.652534][   T72]      netdev_get_by_index+0x5e/0x80
[ 3844.652534][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3844.652534][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3844.652534][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3844.652534][   T72]      ipv6_add_addr+0x411/0x2000
[ 3844.652534][   T72]      inet6_addr_add+0x30e/0xa40
[ 3844.652534][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3844.652534][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.652534][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.652534][   T72]      netlink_unicast+0x449/0x710
[ 3844.652534][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.652534][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.652534][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.652534][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.652534][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.652534][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.652534][   T72] 
[ 3844.654503][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3844.654503][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3844.654503][   T72]      ipv6_find_idev+0x102/0x170
[ 3844.654503][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3844.654503][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.654503][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.654503][   T72]      netlink_unicast+0x449/0x710
[ 3844.654503][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.654503][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.654503][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.654503][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.654503][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.654503][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.654503][   T72] 
[ 3844.656026][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3844.656026][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3844.656026][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3844.656026][   T72]      ipv6_find_idev+0x102/0x170
[ 3844.656026][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3844.656026][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3844.656026][   T72]      netlink_rcv_skb+0x130/0x360
[ 3844.656026][   T72]      netlink_unicast+0x449/0x710
[ 3844.656026][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3844.656026][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3844.656026][   T72]      ___sys_sendmsg+0xee/0x170
[ 3844.656026][   T72]      __sys_sendmsg+0xcd/0x170
[ 3844.656026][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.656026][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.656026][   T72] 
[ 3844.657677][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3844.657920][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3844.657920][   T72]      dst_init+0x84/0x4a0
[ 3844.657920][   T72]      dst_alloc+0x97/0x150
[ 3844.657920][   T72]      ip6_dst_alloc+0x23/0x90
[ 3844.657920][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3844.657920][   T72]      ip6_pol_route+0x56f/0x840
[ 3844.657920][   T72]      fib6_rule_lookup+0x227/0x600
[ 3844.657920][   T72]      ip6_route_output_flags+0x251/0x460
[ 3844.657920][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3844.657920][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3844.657920][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3844.657920][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3844.657920][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3844.657920][   T72]      __sys_connect+0x217/0x2a0
[ 3844.657920][   T72]      __x64_sys_connect+0x72/0xb0
[ 3844.657920][   T72]      do_syscall_64+0xc6/0x1e0
[ 3844.657920][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3844.657920][   T72] 
[ 3854.860635][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3854.861079][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3854.861079][   T72]      netdev_get_by_index+0x5e/0x80
[ 3854.861079][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3854.861079][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3854.861079][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3854.861079][   T72]      ipv6_add_addr+0x411/0x2000
[ 3854.861079][   T72]      inet6_addr_add+0x30e/0xa40
[ 3854.861079][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3854.861079][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.861079][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.861079][   T72]      netlink_unicast+0x449/0x710
[ 3854.861079][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.861079][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.861079][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.861079][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.861079][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.861079][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.861079][   T72] 
[ 3854.863087][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3854.863087][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3854.863087][   T72]      ipv6_find_idev+0x102/0x170
[ 3854.863087][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3854.863087][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.863087][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.863087][   T72]      netlink_unicast+0x449/0x710
[ 3854.863087][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.863087][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.863087][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.863087][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.863087][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.863087][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.863087][   T72] 
[ 3854.864617][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3854.864617][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3854.864617][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3854.864617][   T72]      ipv6_find_idev+0x102/0x170
[ 3854.864617][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3854.864617][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.864617][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.864617][   T72]      netlink_unicast+0x449/0x710
[ 3854.864617][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.864617][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.864617][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.864617][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.864617][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.864617][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.864617][   T72] 
[ 3854.866285][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3854.866559][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3854.866559][   T72]      netdev_get_by_index+0x5e/0x80
[ 3854.866559][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3854.866559][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3854.866559][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3854.866559][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3854.866559][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3854.866559][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3854.866559][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3854.866559][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3854.866559][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3854.866559][   T72]      vfs_write+0x9e5/0x10a0
[ 3854.866559][   T72]      ksys_write+0xf5/0x1e0
[ 3854.866559][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.866559][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.866559][   T72] 
[ 3854.868390][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3854.868390][   T72]      netdev_get_by_index+0x5e/0x80
[ 3854.868390][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3854.868390][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3854.868390][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3854.868390][   T72]      ipv6_add_addr+0x411/0x2000
[ 3854.868390][   T72]      inet6_addr_add+0x30e/0xa40
[ 3854.868390][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3854.868390][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.868390][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.868390][   T72]      netlink_unicast+0x449/0x710
[ 3854.868390][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.868390][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.868390][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.868390][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.868390][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.868390][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.868390][   T72] 
[ 3854.870367][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3854.870367][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3854.870367][   T72]      ipv6_find_idev+0x102/0x170
[ 3854.870367][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3854.870367][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.870367][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.870367][   T72]      netlink_unicast+0x449/0x710
[ 3854.870367][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.870367][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.870367][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.870367][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.870367][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.870367][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.870367][   T72] 
[ 3854.871902][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3854.871902][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3854.871902][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3854.871902][   T72]      ipv6_find_idev+0x102/0x170
[ 3854.871902][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3854.871902][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3854.871902][   T72]      netlink_rcv_skb+0x130/0x360
[ 3854.871902][   T72]      netlink_unicast+0x449/0x710
[ 3854.871902][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3854.871902][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3854.871902][   T72]      ___sys_sendmsg+0xee/0x170
[ 3854.871902][   T72]      __sys_sendmsg+0xcd/0x170
[ 3854.871902][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.871902][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.871902][   T72] 
[ 3854.873578][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3854.873834][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3854.873834][   T72]      dst_init+0x84/0x4a0
[ 3854.873834][   T72]      dst_alloc+0x97/0x150
[ 3854.873834][   T72]      ip6_dst_alloc+0x23/0x90
[ 3854.873834][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3854.873834][   T72]      ip6_pol_route+0x56f/0x840
[ 3854.873834][   T72]      fib6_rule_lookup+0x227/0x600
[ 3854.873834][   T72]      ip6_route_output_flags+0x251/0x460
[ 3854.873834][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3854.873834][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3854.873834][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3854.873834][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3854.873834][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3854.873834][   T72]      __sys_connect+0x217/0x2a0
[ 3854.873834][   T72]      __x64_sys_connect+0x72/0xb0
[ 3854.873834][   T72]      do_syscall_64+0xc6/0x1e0
[ 3854.873834][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3854.873834][   T72] 
[ 3865.124720][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3865.125165][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3865.125165][   T72]      netdev_get_by_index+0x5e/0x80
[ 3865.125165][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3865.125165][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3865.125165][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3865.125165][   T72]      ipv6_add_addr+0x411/0x2000
[ 3865.125165][   T72]      inet6_addr_add+0x30e/0xa40
[ 3865.125165][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3865.125165][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.125165][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.125165][   T72]      netlink_unicast+0x449/0x710
[ 3865.125165][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.125165][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.125165][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.125165][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.125165][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.125165][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.125165][   T72] 
[ 3865.127197][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3865.127197][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3865.127197][   T72]      ipv6_find_idev+0x102/0x170
[ 3865.127197][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3865.127197][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.127197][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.127197][   T72]      netlink_unicast+0x449/0x710
[ 3865.127197][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.127197][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.127197][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.127197][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.127197][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.127197][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.127197][   T72] 
[ 3865.128725][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3865.128725][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3865.128725][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3865.128725][   T72]      ipv6_find_idev+0x102/0x170
[ 3865.128725][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3865.128725][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.128725][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.128725][   T72]      netlink_unicast+0x449/0x710
[ 3865.128725][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.128725][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.128725][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.128725][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.128725][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.128725][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.128725][   T72] 
[ 3865.130403][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3865.130681][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3865.130681][   T72]      netdev_get_by_index+0x5e/0x80
[ 3865.130681][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3865.130681][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3865.130681][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3865.130681][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3865.130681][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3865.130681][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3865.130681][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3865.130681][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3865.130681][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3865.130681][   T72]      vfs_write+0x9e5/0x10a0
[ 3865.130681][   T72]      ksys_write+0xf5/0x1e0
[ 3865.130681][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.130681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.130681][   T72] 
[ 3865.132528][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3865.132528][   T72]      netdev_get_by_index+0x5e/0x80
[ 3865.132528][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3865.132528][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3865.132528][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3865.132528][   T72]      ipv6_add_addr+0x411/0x2000
[ 3865.132528][   T72]      inet6_addr_add+0x30e/0xa40
[ 3865.132528][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3865.132528][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.132528][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.132528][   T72]      netlink_unicast+0x449/0x710
[ 3865.132528][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.132528][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.132528][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.132528][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.132528][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.132528][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.132528][   T72] 
[ 3865.134493][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3865.134493][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3865.134493][   T72]      ipv6_find_idev+0x102/0x170
[ 3865.134493][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3865.134493][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.134493][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.134493][   T72]      netlink_unicast+0x449/0x710
[ 3865.134493][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.134493][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.134493][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.134493][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.134493][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.134493][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.134493][   T72] 
[ 3865.136014][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3865.136014][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3865.136014][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3865.136014][   T72]      ipv6_find_idev+0x102/0x170
[ 3865.136014][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3865.136014][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3865.136014][   T72]      netlink_rcv_skb+0x130/0x360
[ 3865.136014][   T72]      netlink_unicast+0x449/0x710
[ 3865.136014][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3865.136014][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3865.136014][   T72]      ___sys_sendmsg+0xee/0x170
[ 3865.136014][   T72]      __sys_sendmsg+0xcd/0x170
[ 3865.136014][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.136014][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.136014][   T72] 
[ 3865.137680][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3865.137914][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3865.137914][   T72]      dst_init+0x84/0x4a0
[ 3865.137914][   T72]      dst_alloc+0x97/0x150
[ 3865.137914][   T72]      ip6_dst_alloc+0x23/0x90
[ 3865.137914][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3865.137914][   T72]      ip6_pol_route+0x56f/0x840
[ 3865.137914][   T72]      fib6_rule_lookup+0x227/0x600
[ 3865.137914][   T72]      ip6_route_output_flags+0x251/0x460
[ 3865.137914][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3865.137914][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3865.137914][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3865.137914][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3865.137914][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3865.137914][   T72]      __sys_connect+0x217/0x2a0
[ 3865.137914][   T72]      __x64_sys_connect+0x72/0xb0
[ 3865.137914][   T72]      do_syscall_64+0xc6/0x1e0
[ 3865.137914][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3865.137914][   T72] 
[ 3875.140725][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3875.141136][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3875.141136][   T72]      netdev_get_by_index+0x5e/0x80
[ 3875.141136][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3875.141136][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3875.141136][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3875.141136][   T72]      ipv6_add_addr+0x411/0x2000
[ 3875.141136][   T72]      inet6_addr_add+0x30e/0xa40
[ 3875.141136][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3875.141136][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.141136][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.141136][   T72]      netlink_unicast+0x449/0x710
[ 3875.141136][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.141136][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.141136][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.141136][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.141136][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.141136][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.141136][   T72] 
[ 3875.143127][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3875.143127][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3875.143127][   T72]      ipv6_find_idev+0x102/0x170
[ 3875.143127][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3875.143127][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.143127][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.143127][   T72]      netlink_unicast+0x449/0x710
[ 3875.143127][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.143127][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.143127][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.143127][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.143127][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.143127][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.143127][   T72] 
[ 3875.144658][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3875.144658][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3875.144658][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3875.144658][   T72]      ipv6_find_idev+0x102/0x170
[ 3875.144658][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3875.144658][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.144658][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.144658][   T72]      netlink_unicast+0x449/0x710
[ 3875.144658][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.144658][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.144658][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.144658][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.144658][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.144658][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.144658][   T72] 
[ 3875.146332][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3875.146604][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3875.146604][   T72]      netdev_get_by_index+0x5e/0x80
[ 3875.146604][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3875.146604][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3875.146604][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3875.146604][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3875.146604][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3875.146604][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3875.146604][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3875.146604][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3875.146604][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3875.146604][   T72]      vfs_write+0x9e5/0x10a0
[ 3875.146604][   T72]      ksys_write+0xf5/0x1e0
[ 3875.146604][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.146604][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.146604][   T72] 
[ 3875.148428][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3875.148428][   T72]      netdev_get_by_index+0x5e/0x80
[ 3875.148428][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3875.148428][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3875.148428][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3875.148428][   T72]      ipv6_add_addr+0x411/0x2000
[ 3875.148428][   T72]      inet6_addr_add+0x30e/0xa40
[ 3875.148428][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3875.148428][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.148428][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.148428][   T72]      netlink_unicast+0x449/0x710
[ 3875.148428][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.148428][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.148428][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.148428][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.148428][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.148428][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.148428][   T72] 
[ 3875.150394][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3875.150394][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3875.150394][   T72]      ipv6_find_idev+0x102/0x170
[ 3875.150394][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3875.150394][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.150394][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.150394][   T72]      netlink_unicast+0x449/0x710
[ 3875.150394][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.150394][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.150394][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.150394][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.150394][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.150394][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.150394][   T72] 
[ 3875.151910][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3875.151910][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3875.151910][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3875.151910][   T72]      ipv6_find_idev+0x102/0x170
[ 3875.151910][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3875.151910][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3875.151910][   T72]      netlink_rcv_skb+0x130/0x360
[ 3875.151910][   T72]      netlink_unicast+0x449/0x710
[ 3875.151910][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3875.151910][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3875.151910][   T72]      ___sys_sendmsg+0xee/0x170
[ 3875.151910][   T72]      __sys_sendmsg+0xcd/0x170
[ 3875.151910][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.151910][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.151910][   T72] 
[ 3875.153565][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3875.153808][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3875.153808][   T72]      dst_init+0x84/0x4a0
[ 3875.153808][   T72]      dst_alloc+0x97/0x150
[ 3875.153808][   T72]      ip6_dst_alloc+0x23/0x90
[ 3875.153808][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3875.153808][   T72]      ip6_pol_route+0x56f/0x840
[ 3875.153808][   T72]      fib6_rule_lookup+0x227/0x600
[ 3875.153808][   T72]      ip6_route_output_flags+0x251/0x460
[ 3875.153808][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3875.153808][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3875.153808][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3875.153808][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3875.153808][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3875.153808][   T72]      __sys_connect+0x217/0x2a0
[ 3875.153808][   T72]      __x64_sys_connect+0x72/0xb0
[ 3875.153808][   T72]      do_syscall_64+0xc6/0x1e0
[ 3875.153808][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3875.153808][   T72] 
[ 3885.396717][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3885.397159][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3885.397159][   T72]      netdev_get_by_index+0x5e/0x80
[ 3885.397159][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3885.397159][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3885.397159][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3885.397159][   T72]      ipv6_add_addr+0x411/0x2000
[ 3885.397159][   T72]      inet6_addr_add+0x30e/0xa40
[ 3885.397159][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3885.397159][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.397159][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.397159][   T72]      netlink_unicast+0x449/0x710
[ 3885.397159][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.397159][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.397159][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.397159][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.397159][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.397159][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.397159][   T72] 
[ 3885.399163][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3885.399163][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3885.399163][   T72]      ipv6_find_idev+0x102/0x170
[ 3885.399163][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3885.399163][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.399163][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.399163][   T72]      netlink_unicast+0x449/0x710
[ 3885.399163][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.399163][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.399163][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.399163][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.399163][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.399163][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.399163][   T72] 
[ 3885.400681][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3885.400681][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3885.400681][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3885.400681][   T72]      ipv6_find_idev+0x102/0x170
[ 3885.400681][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3885.400681][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.400681][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.400681][   T72]      netlink_unicast+0x449/0x710
[ 3885.400681][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.400681][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.400681][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.400681][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.400681][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.400681][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.400681][   T72] 
[ 3885.402353][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3885.402629][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3885.402629][   T72]      netdev_get_by_index+0x5e/0x80
[ 3885.402629][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3885.402629][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3885.402629][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3885.402629][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3885.402629][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3885.402629][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3885.402629][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3885.402629][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3885.402629][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3885.402629][   T72]      vfs_write+0x9e5/0x10a0
[ 3885.402629][   T72]      ksys_write+0xf5/0x1e0
[ 3885.402629][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.402629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.402629][   T72] 
[ 3885.404446][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3885.404446][   T72]      netdev_get_by_index+0x5e/0x80
[ 3885.404446][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3885.404446][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3885.404446][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3885.404446][   T72]      ipv6_add_addr+0x411/0x2000
[ 3885.404446][   T72]      inet6_addr_add+0x30e/0xa40
[ 3885.404446][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3885.404446][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.404446][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.404446][   T72]      netlink_unicast+0x449/0x710
[ 3885.404446][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.404446][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.404446][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.404446][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.404446][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.404446][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.404446][   T72] 
[ 3885.406410][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3885.406410][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3885.406410][   T72]      ipv6_find_idev+0x102/0x170
[ 3885.406410][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3885.406410][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.406410][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.406410][   T72]      netlink_unicast+0x449/0x710
[ 3885.406410][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.406410][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.406410][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.406410][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.406410][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.406410][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.406410][   T72] 
[ 3885.407923][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3885.407923][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3885.407923][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3885.407923][   T72]      ipv6_find_idev+0x102/0x170
[ 3885.407923][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3885.407923][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3885.407923][   T72]      netlink_rcv_skb+0x130/0x360
[ 3885.407923][   T72]      netlink_unicast+0x449/0x710
[ 3885.407923][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3885.407923][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3885.407923][   T72]      ___sys_sendmsg+0xee/0x170
[ 3885.407923][   T72]      __sys_sendmsg+0xcd/0x170
[ 3885.407923][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.407923][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.407923][   T72] 
[ 3885.409601][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3885.409836][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3885.409836][   T72]      dst_init+0x84/0x4a0
[ 3885.409836][   T72]      dst_alloc+0x97/0x150
[ 3885.409836][   T72]      ip6_dst_alloc+0x23/0x90
[ 3885.409836][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3885.409836][   T72]      ip6_pol_route+0x56f/0x840
[ 3885.409836][   T72]      fib6_rule_lookup+0x227/0x600
[ 3885.409836][   T72]      ip6_route_output_flags+0x251/0x460
[ 3885.409836][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3885.409836][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3885.409836][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3885.409836][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3885.409836][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3885.409836][   T72]      __sys_connect+0x217/0x2a0
[ 3885.409836][   T72]      __x64_sys_connect+0x72/0xb0
[ 3885.409836][   T72]      do_syscall_64+0xc6/0x1e0
[ 3885.409836][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3885.409836][   T72] 
[ 3895.604724][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3895.605203][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3895.605203][   T72]      netdev_get_by_index+0x5e/0x80
[ 3895.605203][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3895.605203][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3895.605203][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3895.605203][   T72]      ipv6_add_addr+0x411/0x2000
[ 3895.605203][   T72]      inet6_addr_add+0x30e/0xa40
[ 3895.605203][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3895.605203][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.605203][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.605203][   T72]      netlink_unicast+0x449/0x710
[ 3895.605203][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.605203][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.605203][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.605203][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.605203][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.605203][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.605203][   T72] 
[ 3895.607197][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3895.607197][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3895.607197][   T72]      ipv6_find_idev+0x102/0x170
[ 3895.607197][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3895.607197][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.607197][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.607197][   T72]      netlink_unicast+0x449/0x710
[ 3895.607197][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.607197][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.607197][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.607197][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.607197][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.607197][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.607197][   T72] 
[ 3895.608724][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3895.608724][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3895.608724][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3895.608724][   T72]      ipv6_find_idev+0x102/0x170
[ 3895.608724][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3895.608724][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.608724][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.608724][   T72]      netlink_unicast+0x449/0x710
[ 3895.608724][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.608724][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.608724][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.608724][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.608724][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.608724][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.608724][   T72] 
[ 3895.610386][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3895.610685][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3895.610685][   T72]      netdev_get_by_index+0x5e/0x80
[ 3895.610685][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3895.610685][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3895.610685][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3895.610685][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3895.610685][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3895.610685][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3895.610685][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3895.610685][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3895.610685][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3895.610685][   T72]      vfs_write+0x9e5/0x10a0
[ 3895.610685][   T72]      ksys_write+0xf5/0x1e0
[ 3895.610685][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.610685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.610685][   T72] 
[ 3895.613032][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3895.613032][   T72]      netdev_get_by_index+0x5e/0x80
[ 3895.613032][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3895.613032][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3895.613032][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3895.613032][   T72]      ipv6_add_addr+0x411/0x2000
[ 3895.613032][   T72]      inet6_addr_add+0x30e/0xa40
[ 3895.613032][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3895.613032][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.613032][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.613032][   T72]      netlink_unicast+0x449/0x710
[ 3895.613032][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.613032][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.613032][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.613032][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.613032][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.613032][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.613032][   T72] 
[ 3895.615358][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3895.615358][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3895.615358][   T72]      ipv6_find_idev+0x102/0x170
[ 3895.615358][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3895.615358][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.615358][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.615358][   T72]      netlink_unicast+0x449/0x710
[ 3895.615358][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.615358][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.615358][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.615358][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.615358][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.615358][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.615358][   T72] 
[ 3895.616863][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3895.616863][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3895.616863][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3895.616863][   T72]      ipv6_find_idev+0x102/0x170
[ 3895.616863][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3895.616863][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3895.616863][   T72]      netlink_rcv_skb+0x130/0x360
[ 3895.616863][   T72]      netlink_unicast+0x449/0x710
[ 3895.616863][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3895.616863][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3895.616863][   T72]      ___sys_sendmsg+0xee/0x170
[ 3895.616863][   T72]      __sys_sendmsg+0xcd/0x170
[ 3895.616863][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.616863][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.616863][   T72] 
[ 3895.618512][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3895.619185][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3895.619185][   T72]      dst_init+0x84/0x4a0
[ 3895.619185][   T72]      dst_alloc+0x97/0x150
[ 3895.619185][   T72]      ip6_dst_alloc+0x23/0x90
[ 3895.619185][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3895.619185][   T72]      ip6_pol_route+0x56f/0x840
[ 3895.619185][   T72]      fib6_rule_lookup+0x227/0x600
[ 3895.619185][   T72]      ip6_route_output_flags+0x251/0x460
[ 3895.619185][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3895.619185][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3895.619185][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3895.619185][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3895.619185][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3895.619185][   T72]      __sys_connect+0x217/0x2a0
[ 3895.619185][   T72]      __x64_sys_connect+0x72/0xb0
[ 3895.619185][   T72]      do_syscall_64+0xc6/0x1e0
[ 3895.619185][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3895.619185][   T72] 
[ 3905.860702][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3905.861153][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3905.861153][   T72]      netdev_get_by_index+0x5e/0x80
[ 3905.861153][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3905.861153][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3905.861153][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3905.861153][   T72]      ipv6_add_addr+0x411/0x2000
[ 3905.861153][   T72]      inet6_addr_add+0x30e/0xa40
[ 3905.861153][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3905.861153][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.861153][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.861153][   T72]      netlink_unicast+0x449/0x710
[ 3905.861153][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.861153][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.861153][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.861153][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.861153][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.861153][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.861153][   T72] 
[ 3905.863135][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3905.863135][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3905.863135][   T72]      ipv6_find_idev+0x102/0x170
[ 3905.863135][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3905.863135][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.863135][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.863135][   T72]      netlink_unicast+0x449/0x710
[ 3905.863135][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.863135][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.863135][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.863135][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.863135][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.863135][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.863135][   T72] 
[ 3905.864647][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3905.864647][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3905.864647][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3905.864647][   T72]      ipv6_find_idev+0x102/0x170
[ 3905.864647][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3905.864647][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.864647][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.864647][   T72]      netlink_unicast+0x449/0x710
[ 3905.864647][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.864647][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.864647][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.864647][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.864647][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.864647][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.864647][   T72] 
[ 3905.866308][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3905.866579][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3905.866579][   T72]      netdev_get_by_index+0x5e/0x80
[ 3905.866579][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3905.866579][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3905.866579][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3905.866579][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3905.866579][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3905.866579][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3905.866579][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3905.866579][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3905.866579][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3905.866579][   T72]      vfs_write+0x9e5/0x10a0
[ 3905.866579][   T72]      ksys_write+0xf5/0x1e0
[ 3905.866579][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.866579][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.866579][   T72] 
[ 3905.868396][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3905.868396][   T72]      netdev_get_by_index+0x5e/0x80
[ 3905.868396][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3905.868396][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3905.868396][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3905.868396][   T72]      ipv6_add_addr+0x411/0x2000
[ 3905.868396][   T72]      inet6_addr_add+0x30e/0xa40
[ 3905.868396][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3905.868396][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.868396][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.868396][   T72]      netlink_unicast+0x449/0x710
[ 3905.868396][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.868396][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.868396][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.868396][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.868396][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.868396][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.868396][   T72] 
[ 3905.870357][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3905.870357][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3905.870357][   T72]      ipv6_find_idev+0x102/0x170
[ 3905.870357][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3905.870357][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.870357][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.870357][   T72]      netlink_unicast+0x449/0x710
[ 3905.870357][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.870357][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.870357][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.870357][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.870357][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.870357][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.870357][   T72] 
[ 3905.871881][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3905.871881][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3905.871881][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3905.871881][   T72]      ipv6_find_idev+0x102/0x170
[ 3905.871881][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3905.871881][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3905.871881][   T72]      netlink_rcv_skb+0x130/0x360
[ 3905.871881][   T72]      netlink_unicast+0x449/0x710
[ 3905.871881][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3905.871881][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3905.871881][   T72]      ___sys_sendmsg+0xee/0x170
[ 3905.871881][   T72]      __sys_sendmsg+0xcd/0x170
[ 3905.871881][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.871881][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.871881][   T72] 
[ 3905.873543][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3905.873790][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3905.873790][   T72]      dst_init+0x84/0x4a0
[ 3905.873790][   T72]      dst_alloc+0x97/0x150
[ 3905.873790][   T72]      ip6_dst_alloc+0x23/0x90
[ 3905.873790][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3905.873790][   T72]      ip6_pol_route+0x56f/0x840
[ 3905.873790][   T72]      fib6_rule_lookup+0x227/0x600
[ 3905.873790][   T72]      ip6_route_output_flags+0x251/0x460
[ 3905.873790][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3905.873790][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3905.873790][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3905.873790][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3905.873790][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3905.873790][   T72]      __sys_connect+0x217/0x2a0
[ 3905.873790][   T72]      __x64_sys_connect+0x72/0xb0
[ 3905.873790][   T72]      do_syscall_64+0xc6/0x1e0
[ 3905.873790][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3905.873790][   T72] 
[ 3916.116706][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3916.117172][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3916.117172][   T72]      netdev_get_by_index+0x5e/0x80
[ 3916.117172][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3916.117172][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3916.117172][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3916.117172][   T72]      ipv6_add_addr+0x411/0x2000
[ 3916.117172][   T72]      inet6_addr_add+0x30e/0xa40
[ 3916.117172][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3916.117172][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.117172][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.117172][   T72]      netlink_unicast+0x449/0x710
[ 3916.117172][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.117172][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.117172][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.117172][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.117172][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.117172][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.117172][   T72] 
[ 3916.119160][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3916.119160][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3916.119160][   T72]      ipv6_find_idev+0x102/0x170
[ 3916.119160][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3916.119160][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.119160][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.119160][   T72]      netlink_unicast+0x449/0x710
[ 3916.119160][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.119160][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.119160][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.119160][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.119160][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.119160][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.119160][   T72] 
[ 3916.120685][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3916.120685][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3916.120685][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3916.120685][   T72]      ipv6_find_idev+0x102/0x170
[ 3916.120685][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3916.120685][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.120685][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.120685][   T72]      netlink_unicast+0x449/0x710
[ 3916.120685][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.120685][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.120685][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.120685][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.120685][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.120685][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.120685][   T72] 
[ 3916.122732][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3916.122995][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3916.122995][   T72]      netdev_get_by_index+0x5e/0x80
[ 3916.122995][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3916.122995][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3916.122995][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3916.122995][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3916.122995][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3916.122995][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3916.122995][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3916.122995][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3916.122995][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3916.122995][   T72]      vfs_write+0x9e5/0x10a0
[ 3916.122995][   T72]      ksys_write+0xf5/0x1e0
[ 3916.122995][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.122995][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.122995][   T72] 
[ 3916.124822][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3916.124822][   T72]      netdev_get_by_index+0x5e/0x80
[ 3916.124822][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3916.124822][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3916.124822][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3916.124822][   T72]      ipv6_add_addr+0x411/0x2000
[ 3916.124822][   T72]      inet6_addr_add+0x30e/0xa40
[ 3916.124822][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3916.124822][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.124822][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.124822][   T72]      netlink_unicast+0x449/0x710
[ 3916.124822][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.124822][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.124822][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.124822][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.124822][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.124822][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.124822][   T72] 
[ 3916.126786][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3916.126786][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3916.126786][   T72]      ipv6_find_idev+0x102/0x170
[ 3916.126786][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3916.126786][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.126786][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.126786][   T72]      netlink_unicast+0x449/0x710
[ 3916.126786][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.126786][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.126786][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.126786][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.126786][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.126786][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.126786][   T72] 
[ 3916.128303][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3916.128303][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3916.128303][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3916.128303][   T72]      ipv6_find_idev+0x102/0x170
[ 3916.128303][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3916.128303][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3916.128303][   T72]      netlink_rcv_skb+0x130/0x360
[ 3916.128303][   T72]      netlink_unicast+0x449/0x710
[ 3916.128303][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3916.128303][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3916.128303][   T72]      ___sys_sendmsg+0xee/0x170
[ 3916.128303][   T72]      __sys_sendmsg+0xcd/0x170
[ 3916.128303][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.128303][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.128303][   T72] 
[ 3916.129996][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3916.130231][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3916.130231][   T72]      dst_init+0x84/0x4a0
[ 3916.130231][   T72]      dst_alloc+0x97/0x150
[ 3916.130231][   T72]      ip6_dst_alloc+0x23/0x90
[ 3916.130231][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3916.130231][   T72]      ip6_pol_route+0x56f/0x840
[ 3916.130231][   T72]      fib6_rule_lookup+0x227/0x600
[ 3916.130231][   T72]      ip6_route_output_flags+0x251/0x460
[ 3916.130231][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3916.130231][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3916.130231][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3916.130231][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3916.130231][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3916.130231][   T72]      __sys_connect+0x217/0x2a0
[ 3916.130231][   T72]      __x64_sys_connect+0x72/0xb0
[ 3916.130231][   T72]      do_syscall_64+0xc6/0x1e0
[ 3916.130231][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3916.130231][   T72] 
[ 3926.372653][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3926.373102][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3926.373102][   T72]      netdev_get_by_index+0x5e/0x80
[ 3926.373102][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3926.373102][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3926.373102][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3926.373102][   T72]      ipv6_add_addr+0x411/0x2000
[ 3926.373102][   T72]      inet6_addr_add+0x30e/0xa40
[ 3926.373102][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3926.373102][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.373102][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.373102][   T72]      netlink_unicast+0x449/0x710
[ 3926.373102][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.373102][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.373102][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.373102][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.373102][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.373102][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.373102][   T72] 
[ 3926.375084][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3926.375084][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3926.375084][   T72]      ipv6_find_idev+0x102/0x170
[ 3926.375084][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3926.375084][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.375084][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.375084][   T72]      netlink_unicast+0x449/0x710
[ 3926.375084][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.375084][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.375084][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.375084][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.375084][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.375084][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.375084][   T72] 
[ 3926.376613][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3926.376613][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3926.376613][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3926.376613][   T72]      ipv6_find_idev+0x102/0x170
[ 3926.376613][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3926.376613][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.376613][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.376613][   T72]      netlink_unicast+0x449/0x710
[ 3926.376613][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.376613][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.376613][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.376613][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.376613][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.376613][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.376613][   T72] 
[ 3926.378271][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3926.378571][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3926.378571][   T72]      netdev_get_by_index+0x5e/0x80
[ 3926.378571][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3926.378571][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3926.378571][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3926.378571][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3926.378571][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3926.378571][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3926.378571][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3926.378571][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3926.378571][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3926.378571][   T72]      vfs_write+0x9e5/0x10a0
[ 3926.378571][   T72]      ksys_write+0xf5/0x1e0
[ 3926.378571][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.378571][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.378571][   T72] 
[ 3926.380435][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3926.380435][   T72]      netdev_get_by_index+0x5e/0x80
[ 3926.380435][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3926.380435][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3926.380435][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3926.380435][   T72]      ipv6_add_addr+0x411/0x2000
[ 3926.380435][   T72]      inet6_addr_add+0x30e/0xa40
[ 3926.380435][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3926.380435][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.380435][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.380435][   T72]      netlink_unicast+0x449/0x710
[ 3926.380435][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.380435][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.380435][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.380435][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.380435][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.380435][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.380435][   T72] 
[ 3926.382398][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3926.382398][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3926.382398][   T72]      ipv6_find_idev+0x102/0x170
[ 3926.382398][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3926.382398][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.382398][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.382398][   T72]      netlink_unicast+0x449/0x710
[ 3926.382398][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.382398][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.382398][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.382398][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.382398][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.382398][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.382398][   T72] 
[ 3926.383910][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3926.383910][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3926.383910][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3926.383910][   T72]      ipv6_find_idev+0x102/0x170
[ 3926.383910][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3926.383910][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3926.383910][   T72]      netlink_rcv_skb+0x130/0x360
[ 3926.383910][   T72]      netlink_unicast+0x449/0x710
[ 3926.383910][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3926.383910][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3926.383910][   T72]      ___sys_sendmsg+0xee/0x170
[ 3926.383910][   T72]      __sys_sendmsg+0xcd/0x170
[ 3926.383910][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.383910][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.383910][   T72] 
[ 3926.385561][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3926.385805][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3926.385805][   T72]      dst_init+0x84/0x4a0
[ 3926.385805][   T72]      dst_alloc+0x97/0x150
[ 3926.385805][   T72]      ip6_dst_alloc+0x23/0x90
[ 3926.385805][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3926.385805][   T72]      ip6_pol_route+0x56f/0x840
[ 3926.385805][   T72]      fib6_rule_lookup+0x227/0x600
[ 3926.385805][   T72]      ip6_route_output_flags+0x251/0x460
[ 3926.385805][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3926.385805][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3926.385805][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3926.385805][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3926.385805][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3926.385805][   T72]      __sys_connect+0x217/0x2a0
[ 3926.385805][   T72]      __x64_sys_connect+0x72/0xb0
[ 3926.385805][   T72]      do_syscall_64+0xc6/0x1e0
[ 3926.385805][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3926.385805][   T72] 
[ 3936.628654][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3936.629038][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3936.629038][   T72]      netdev_get_by_index+0x5e/0x80
[ 3936.629038][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3936.629038][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3936.629038][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3936.629038][   T72]      ipv6_add_addr+0x411/0x2000
[ 3936.629038][   T72]      inet6_addr_add+0x30e/0xa40
[ 3936.629038][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3936.629038][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.629038][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.629038][   T72]      netlink_unicast+0x449/0x710
[ 3936.629038][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.629038][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.629038][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.629038][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.629038][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.629038][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.629038][   T72] 
[ 3936.631017][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3936.631017][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3936.631017][   T72]      ipv6_find_idev+0x102/0x170
[ 3936.631017][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3936.631017][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.631017][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.631017][   T72]      netlink_unicast+0x449/0x710
[ 3936.631017][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.631017][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.631017][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.631017][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.631017][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.631017][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.631017][   T72] 
[ 3936.632555][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3936.632555][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3936.632555][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3936.632555][   T72]      ipv6_find_idev+0x102/0x170
[ 3936.632555][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3936.632555][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.632555][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.632555][   T72]      netlink_unicast+0x449/0x710
[ 3936.632555][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.632555][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.632555][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.632555][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.632555][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.632555][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.632555][   T72] 
[ 3936.634212][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3936.634474][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3936.634474][   T72]      netdev_get_by_index+0x5e/0x80
[ 3936.634474][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3936.634474][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3936.634474][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3936.634474][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3936.634474][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3936.634474][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3936.634474][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3936.634474][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3936.634474][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3936.634474][   T72]      vfs_write+0x9e5/0x10a0
[ 3936.634474][   T72]      ksys_write+0xf5/0x1e0
[ 3936.634474][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.634474][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.634474][   T72] 
[ 3936.636292][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3936.636292][   T72]      netdev_get_by_index+0x5e/0x80
[ 3936.636292][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3936.636292][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3936.636292][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3936.636292][   T72]      ipv6_add_addr+0x411/0x2000
[ 3936.636292][   T72]      inet6_addr_add+0x30e/0xa40
[ 3936.636292][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3936.636292][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.636292][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.636292][   T72]      netlink_unicast+0x449/0x710
[ 3936.636292][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.636292][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.636292][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.636292][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.636292][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.636292][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.636292][   T72] 
[ 3936.638242][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3936.638242][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3936.638242][   T72]      ipv6_find_idev+0x102/0x170
[ 3936.638242][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3936.638242][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.638242][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.638242][   T72]      netlink_unicast+0x449/0x710
[ 3936.638242][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.638242][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.638242][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.638242][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.638242][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.638242][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.638242][   T72] 
[ 3936.639768][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3936.639768][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3936.639768][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3936.639768][   T72]      ipv6_find_idev+0x102/0x170
[ 3936.639768][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3936.639768][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3936.639768][   T72]      netlink_rcv_skb+0x130/0x360
[ 3936.639768][   T72]      netlink_unicast+0x449/0x710
[ 3936.639768][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3936.639768][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3936.639768][   T72]      ___sys_sendmsg+0xee/0x170
[ 3936.639768][   T72]      __sys_sendmsg+0xcd/0x170
[ 3936.639768][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.639768][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.639768][   T72] 
[ 3936.641414][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3936.641658][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3936.641658][   T72]      dst_init+0x84/0x4a0
[ 3936.641658][   T72]      dst_alloc+0x97/0x150
[ 3936.641658][   T72]      ip6_dst_alloc+0x23/0x90
[ 3936.641658][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3936.641658][   T72]      ip6_pol_route+0x56f/0x840
[ 3936.641658][   T72]      fib6_rule_lookup+0x227/0x600
[ 3936.641658][   T72]      ip6_route_output_flags+0x251/0x460
[ 3936.641658][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3936.641658][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3936.641658][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3936.641658][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3936.641658][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3936.641658][   T72]      __sys_connect+0x217/0x2a0
[ 3936.641658][   T72]      __x64_sys_connect+0x72/0xb0
[ 3936.641658][   T72]      do_syscall_64+0xc6/0x1e0
[ 3936.641658][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3936.641658][   T72] 
[ 3946.884653][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3946.885032][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3946.885032][   T72]      netdev_get_by_index+0x5e/0x80
[ 3946.885032][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3946.885032][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3946.885032][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3946.885032][   T72]      ipv6_add_addr+0x411/0x2000
[ 3946.885032][   T72]      inet6_addr_add+0x30e/0xa40
[ 3946.885032][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3946.885032][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.885032][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.885032][   T72]      netlink_unicast+0x449/0x710
[ 3946.885032][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.885032][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.885032][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.885032][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.885032][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.885032][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.885032][   T72] 
[ 3946.887007][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3946.887007][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3946.887007][   T72]      ipv6_find_idev+0x102/0x170
[ 3946.887007][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3946.887007][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.887007][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.887007][   T72]      netlink_unicast+0x449/0x710
[ 3946.887007][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.887007][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.887007][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.887007][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.887007][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.887007][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.887007][   T72] 
[ 3946.888527][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3946.888527][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3946.888527][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3946.888527][   T72]      ipv6_find_idev+0x102/0x170
[ 3946.888527][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3946.888527][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.888527][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.888527][   T72]      netlink_unicast+0x449/0x710
[ 3946.888527][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.888527][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.888527][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.888527][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.888527][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.888527][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.888527][   T72] 
[ 3946.890181][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3946.890442][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3946.890442][   T72]      netdev_get_by_index+0x5e/0x80
[ 3946.890442][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3946.890442][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3946.890442][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3946.890442][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3946.890442][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3946.890442][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3946.890442][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3946.890442][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3946.890442][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3946.890442][   T72]      vfs_write+0x9e5/0x10a0
[ 3946.890442][   T72]      ksys_write+0xf5/0x1e0
[ 3946.890442][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.890442][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.890442][   T72] 
[ 3946.892285][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3946.892285][   T72]      netdev_get_by_index+0x5e/0x80
[ 3946.892285][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3946.892285][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3946.892285][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3946.892285][   T72]      ipv6_add_addr+0x411/0x2000
[ 3946.892285][   T72]      inet6_addr_add+0x30e/0xa40
[ 3946.892285][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3946.892285][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.892285][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.892285][   T72]      netlink_unicast+0x449/0x710
[ 3946.892285][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.892285][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.892285][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.892285][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.892285][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.892285][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.892285][   T72] 
[ 3946.894263][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3946.894263][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3946.894263][   T72]      ipv6_find_idev+0x102/0x170
[ 3946.894263][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3946.894263][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.894263][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.894263][   T72]      netlink_unicast+0x449/0x710
[ 3946.894263][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.894263][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.894263][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.894263][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.894263][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.894263][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.894263][   T72] 
[ 3946.895790][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3946.895790][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3946.895790][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3946.895790][   T72]      ipv6_find_idev+0x102/0x170
[ 3946.895790][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3946.895790][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3946.895790][   T72]      netlink_rcv_skb+0x130/0x360
[ 3946.895790][   T72]      netlink_unicast+0x449/0x710
[ 3946.895790][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3946.895790][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3946.895790][   T72]      ___sys_sendmsg+0xee/0x170
[ 3946.895790][   T72]      __sys_sendmsg+0xcd/0x170
[ 3946.895790][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.895790][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.895790][   T72] 
[ 3946.897454][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3946.897704][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3946.897704][   T72]      dst_init+0x84/0x4a0
[ 3946.897704][   T72]      dst_alloc+0x97/0x150
[ 3946.897704][   T72]      ip6_dst_alloc+0x23/0x90
[ 3946.897704][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3946.897704][   T72]      ip6_pol_route+0x56f/0x840
[ 3946.897704][   T72]      fib6_rule_lookup+0x227/0x600
[ 3946.897704][   T72]      ip6_route_output_flags+0x251/0x460
[ 3946.897704][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3946.897704][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3946.897704][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3946.897704][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3946.897704][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3946.897704][   T72]      __sys_connect+0x217/0x2a0
[ 3946.897704][   T72]      __x64_sys_connect+0x72/0xb0
[ 3946.897704][   T72]      do_syscall_64+0xc6/0x1e0
[ 3946.897704][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3946.897704][   T72] 
[ 3957.140738][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3957.141187][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3957.141187][   T72]      netdev_get_by_index+0x5e/0x80
[ 3957.141187][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3957.141187][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3957.141187][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3957.141187][   T72]      ipv6_add_addr+0x411/0x2000
[ 3957.141187][   T72]      inet6_addr_add+0x30e/0xa40
[ 3957.141187][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3957.141187][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.141187][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.141187][   T72]      netlink_unicast+0x449/0x710
[ 3957.141187][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.141187][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.141187][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.141187][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.141187][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.141187][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.141187][   T72] 
[ 3957.143169][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3957.143169][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3957.143169][   T72]      ipv6_find_idev+0x102/0x170
[ 3957.143169][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3957.143169][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.143169][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.143169][   T72]      netlink_unicast+0x449/0x710
[ 3957.143169][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.143169][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.143169][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.143169][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.143169][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.143169][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.143169][   T72] 
[ 3957.144794][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3957.144794][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3957.144794][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3957.144794][   T72]      ipv6_find_idev+0x102/0x170
[ 3957.144794][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3957.144794][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.144794][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.144794][   T72]      netlink_unicast+0x449/0x710
[ 3957.144794][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.144794][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.144794][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.144794][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.144794][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.144794][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.144794][   T72] 
[ 3957.146463][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3957.146748][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3957.146748][   T72]      netdev_get_by_index+0x5e/0x80
[ 3957.146748][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3957.146748][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3957.146748][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3957.146748][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3957.146748][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3957.146748][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3957.146748][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3957.146748][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3957.146748][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3957.146748][   T72]      vfs_write+0x9e5/0x10a0
[ 3957.146748][   T72]      ksys_write+0xf5/0x1e0
[ 3957.146748][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.146748][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.146748][   T72] 
[ 3957.148566][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3957.148566][   T72]      netdev_get_by_index+0x5e/0x80
[ 3957.148566][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3957.148566][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3957.148566][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3957.148566][   T72]      ipv6_add_addr+0x411/0x2000
[ 3957.148566][   T72]      inet6_addr_add+0x30e/0xa40
[ 3957.148566][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3957.148566][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.148566][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.148566][   T72]      netlink_unicast+0x449/0x710
[ 3957.148566][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.148566][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.148566][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.148566][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.148566][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.148566][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.148566][   T72] 
[ 3957.150533][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3957.150533][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3957.150533][   T72]      ipv6_find_idev+0x102/0x170
[ 3957.150533][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3957.150533][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.150533][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.150533][   T72]      netlink_unicast+0x449/0x710
[ 3957.150533][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.150533][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.150533][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.150533][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.150533][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.150533][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.150533][   T72] 
[ 3957.152051][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3957.152051][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3957.152051][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3957.152051][   T72]      ipv6_find_idev+0x102/0x170
[ 3957.152051][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3957.152051][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3957.152051][   T72]      netlink_rcv_skb+0x130/0x360
[ 3957.152051][   T72]      netlink_unicast+0x449/0x710
[ 3957.152051][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3957.152051][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3957.152051][   T72]      ___sys_sendmsg+0xee/0x170
[ 3957.152051][   T72]      __sys_sendmsg+0xcd/0x170
[ 3957.152051][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.152051][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.152051][   T72] 
[ 3957.153701][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3957.153972][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3957.153972][   T72]      dst_init+0x84/0x4a0
[ 3957.153972][   T72]      dst_alloc+0x97/0x150
[ 3957.153972][   T72]      ip6_dst_alloc+0x23/0x90
[ 3957.153972][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3957.153972][   T72]      ip6_pol_route+0x56f/0x840
[ 3957.153972][   T72]      fib6_rule_lookup+0x227/0x600
[ 3957.153972][   T72]      ip6_route_output_flags+0x251/0x460
[ 3957.153972][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3957.153972][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3957.153972][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3957.153972][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3957.153972][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3957.153972][   T72]      __sys_connect+0x217/0x2a0
[ 3957.153972][   T72]      __x64_sys_connect+0x72/0xb0
[ 3957.153972][   T72]      do_syscall_64+0xc6/0x1e0
[ 3957.153972][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3957.153972][   T72] 
[ 3967.396722][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3967.397161][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3967.397161][   T72]      netdev_get_by_index+0x5e/0x80
[ 3967.397161][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3967.397161][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3967.397161][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3967.397161][   T72]      ipv6_add_addr+0x411/0x2000
[ 3967.397161][   T72]      inet6_addr_add+0x30e/0xa40
[ 3967.397161][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3967.397161][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.397161][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.397161][   T72]      netlink_unicast+0x449/0x710
[ 3967.397161][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.397161][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.397161][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.397161][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.397161][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.397161][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.397161][   T72] 
[ 3967.399176][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3967.399176][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3967.399176][   T72]      ipv6_find_idev+0x102/0x170
[ 3967.399176][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3967.399176][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.399176][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.399176][   T72]      netlink_unicast+0x449/0x710
[ 3967.399176][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.399176][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.399176][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.399176][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.399176][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.399176][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.399176][   T72] 
[ 3967.400703][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3967.400703][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3967.400703][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3967.400703][   T72]      ipv6_find_idev+0x102/0x170
[ 3967.400703][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3967.400703][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.400703][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.400703][   T72]      netlink_unicast+0x449/0x710
[ 3967.400703][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.400703][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.400703][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.400703][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.400703][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.400703][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.400703][   T72] 
[ 3967.402399][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3967.402675][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3967.402675][   T72]      netdev_get_by_index+0x5e/0x80
[ 3967.402675][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3967.402675][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3967.402675][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3967.402675][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3967.402675][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3967.402675][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3967.402675][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3967.402675][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3967.402675][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3967.402675][   T72]      vfs_write+0x9e5/0x10a0
[ 3967.402675][   T72]      ksys_write+0xf5/0x1e0
[ 3967.402675][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.402675][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.402675][   T72] 
[ 3967.404507][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3967.404507][   T72]      netdev_get_by_index+0x5e/0x80
[ 3967.404507][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3967.404507][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3967.404507][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3967.404507][   T72]      ipv6_add_addr+0x411/0x2000
[ 3967.404507][   T72]      inet6_addr_add+0x30e/0xa40
[ 3967.404507][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3967.404507][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.404507][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.404507][   T72]      netlink_unicast+0x449/0x710
[ 3967.404507][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.404507][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.404507][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.404507][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.404507][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.404507][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.404507][   T72] 
[ 3967.406483][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3967.406483][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3967.406483][   T72]      ipv6_find_idev+0x102/0x170
[ 3967.406483][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3967.406483][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.406483][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.406483][   T72]      netlink_unicast+0x449/0x710
[ 3967.406483][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.406483][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.406483][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.406483][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.406483][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.406483][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.406483][   T72] 
[ 3967.407997][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3967.407997][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3967.407997][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3967.407997][   T72]      ipv6_find_idev+0x102/0x170
[ 3967.407997][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3967.407997][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3967.407997][   T72]      netlink_rcv_skb+0x130/0x360
[ 3967.407997][   T72]      netlink_unicast+0x449/0x710
[ 3967.407997][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3967.407997][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3967.407997][   T72]      ___sys_sendmsg+0xee/0x170
[ 3967.407997][   T72]      __sys_sendmsg+0xcd/0x170
[ 3967.407997][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.407997][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.407997][   T72] 
[ 3967.409665][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3967.409900][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3967.409900][   T72]      dst_init+0x84/0x4a0
[ 3967.409900][   T72]      dst_alloc+0x97/0x150
[ 3967.409900][   T72]      ip6_dst_alloc+0x23/0x90
[ 3967.409900][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3967.409900][   T72]      ip6_pol_route+0x56f/0x840
[ 3967.409900][   T72]      fib6_rule_lookup+0x227/0x600
[ 3967.409900][   T72]      ip6_route_output_flags+0x251/0x460
[ 3967.409900][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3967.409900][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3967.409900][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3967.409900][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3967.409900][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3967.409900][   T72]      __sys_connect+0x217/0x2a0
[ 3967.409900][   T72]      __x64_sys_connect+0x72/0xb0
[ 3967.409900][   T72]      do_syscall_64+0xc6/0x1e0
[ 3967.409900][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3967.409900][   T72] 
[ 3977.652667][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3977.653138][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3977.653138][   T72]      netdev_get_by_index+0x5e/0x80
[ 3977.653138][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3977.653138][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3977.653138][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3977.653138][   T72]      ipv6_add_addr+0x411/0x2000
[ 3977.653138][   T72]      inet6_addr_add+0x30e/0xa40
[ 3977.653138][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3977.653138][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.653138][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.653138][   T72]      netlink_unicast+0x449/0x710
[ 3977.653138][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.653138][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.653138][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.653138][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.653138][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.653138][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.653138][   T72] 
[ 3977.655168][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3977.655168][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3977.655168][   T72]      ipv6_find_idev+0x102/0x170
[ 3977.655168][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3977.655168][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.655168][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.655168][   T72]      netlink_unicast+0x449/0x710
[ 3977.655168][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.655168][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.655168][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.655168][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.655168][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.655168][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.655168][   T72] 
[ 3977.656718][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3977.656718][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3977.656718][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3977.656718][   T72]      ipv6_find_idev+0x102/0x170
[ 3977.656718][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3977.656718][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.656718][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.656718][   T72]      netlink_unicast+0x449/0x710
[ 3977.656718][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.656718][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.656718][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.656718][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.656718][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.656718][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.656718][   T72] 
[ 3977.658465][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3977.658758][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3977.658758][   T72]      netdev_get_by_index+0x5e/0x80
[ 3977.658758][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3977.658758][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3977.658758][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3977.658758][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3977.658758][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3977.658758][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3977.658758][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3977.658758][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3977.658758][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3977.658758][   T72]      vfs_write+0x9e5/0x10a0
[ 3977.658758][   T72]      ksys_write+0xf5/0x1e0
[ 3977.658758][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.658758][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.658758][   T72] 
[ 3977.660608][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3977.660608][   T72]      netdev_get_by_index+0x5e/0x80
[ 3977.660608][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3977.660608][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3977.660608][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3977.660608][   T72]      ipv6_add_addr+0x411/0x2000
[ 3977.660608][   T72]      inet6_addr_add+0x30e/0xa40
[ 3977.660608][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3977.660608][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.660608][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.660608][   T72]      netlink_unicast+0x449/0x710
[ 3977.660608][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.660608][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.660608][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.660608][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.660608][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.660608][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.660608][   T72] 
[ 3977.662629][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3977.662629][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3977.662629][   T72]      ipv6_find_idev+0x102/0x170
[ 3977.662629][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3977.662629][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.662629][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.662629][   T72]      netlink_unicast+0x449/0x710
[ 3977.662629][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.662629][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.662629][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.662629][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.662629][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.662629][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.662629][   T72] 
[ 3977.664162][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3977.664162][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3977.664162][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3977.664162][   T72]      ipv6_find_idev+0x102/0x170
[ 3977.664162][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3977.664162][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3977.664162][   T72]      netlink_rcv_skb+0x130/0x360
[ 3977.664162][   T72]      netlink_unicast+0x449/0x710
[ 3977.664162][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3977.664162][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3977.664162][   T72]      ___sys_sendmsg+0xee/0x170
[ 3977.664162][   T72]      __sys_sendmsg+0xcd/0x170
[ 3977.664162][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.664162][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.664162][   T72] 
[ 3977.665872][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3977.666120][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3977.666120][   T72]      dst_init+0x84/0x4a0
[ 3977.666120][   T72]      dst_alloc+0x97/0x150
[ 3977.666120][   T72]      ip6_dst_alloc+0x23/0x90
[ 3977.666120][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3977.666120][   T72]      ip6_pol_route+0x56f/0x840
[ 3977.666120][   T72]      fib6_rule_lookup+0x227/0x600
[ 3977.666120][   T72]      ip6_route_output_flags+0x251/0x460
[ 3977.666120][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3977.666120][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3977.666120][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3977.666120][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3977.666120][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3977.666120][   T72]      __sys_connect+0x217/0x2a0
[ 3977.666120][   T72]      __x64_sys_connect+0x72/0xb0
[ 3977.666120][   T72]      do_syscall_64+0xc6/0x1e0
[ 3977.666120][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3977.666120][   T72] 
[ 3987.892678][   T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4
[ 3987.893137][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3987.893137][   T72]      netdev_get_by_index+0x5e/0x80
[ 3987.893137][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3987.893137][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3987.893137][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3987.893137][   T72]      ipv6_add_addr+0x411/0x2000
[ 3987.893137][   T72]      inet6_addr_add+0x30e/0xa40
[ 3987.893137][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3987.893137][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.893137][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.893137][   T72]      netlink_unicast+0x449/0x710
[ 3987.893137][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.893137][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.893137][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.893137][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.893137][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.893137][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.893137][   T72] 
[ 3987.895150][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3987.895150][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3987.895150][   T72]      ipv6_find_idev+0x102/0x170
[ 3987.895150][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3987.895150][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.895150][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.895150][   T72]      netlink_unicast+0x449/0x710
[ 3987.895150][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.895150][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.895150][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.895150][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.895150][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.895150][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.895150][   T72] 
[ 3987.896686][   T72] ref_tracker: ns1eth2@ffff8880064b15c0 has 1/3 users at
[ 3987.896686][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3987.896686][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3987.896686][   T72]      ipv6_find_idev+0x102/0x170
[ 3987.896686][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3987.896686][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.896686][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.896686][   T72]      netlink_unicast+0x449/0x710
[ 3987.896686][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.896686][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.896686][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.896686][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.896686][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.896686][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.896686][   T72] 
[ 3987.898379][   T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5
[ 3987.898670][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3987.898670][   T72]      netdev_get_by_index+0x5e/0x80
[ 3987.898670][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3987.898670][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3987.898670][   T72]      addrconf_f6i_alloc+0x19e/0x410
[ 3987.898670][   T72]      __ipv6_dev_ac_inc+0x25f/0xb10
[ 3987.898670][   T72]      addrconf_join_anycast+0x1c0/0x220
[ 3987.898670][   T72]      dev_forward_change+0x2a6/0x7b0
[ 3987.898670][   T72]      addrconf_fixup_forwarding+0x23f/0x460
[ 3987.898670][   T72]      addrconf_sysctl_forward+0x212/0x2b0
[ 3987.898670][   T72]      proc_sys_call_handler+0x403/0x5e0
[ 3987.898670][   T72]      vfs_write+0x9e5/0x10a0
[ 3987.898670][   T72]      ksys_write+0xf5/0x1e0
[ 3987.898670][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.898670][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.898670][   T72] 
[ 3987.900513][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3987.900513][   T72]      netdev_get_by_index+0x5e/0x80
[ 3987.900513][   T72]      fib6_nh_init+0x3d8/0x15b0
[ 3987.900513][   T72]      ip6_route_info_create+0xf18/0x17d0
[ 3987.900513][   T72]      addrconf_f6i_alloc+0x244/0x410
[ 3987.900513][   T72]      ipv6_add_addr+0x411/0x2000
[ 3987.900513][   T72]      inet6_addr_add+0x30e/0xa40
[ 3987.900513][   T72]      inet6_rtm_newaddr+0x560/0x6b0
[ 3987.900513][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.900513][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.900513][   T72]      netlink_unicast+0x449/0x710
[ 3987.900513][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.900513][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.900513][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.900513][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.900513][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.900513][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.900513][   T72] 
[ 3987.902512][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3987.902512][   T72]      ipv6_add_dev+0x3ba/0x11c0
[ 3987.902512][   T72]      ipv6_find_idev+0x102/0x170
[ 3987.902512][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3987.902512][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.902512][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.902512][   T72]      netlink_unicast+0x449/0x710
[ 3987.902512][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.902512][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.902512][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.902512][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.902512][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.902512][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.902512][   T72] 
[ 3987.904038][   T72] ref_tracker: ns2eth1@ffff8880059f15c0 has 1/4 users at
[ 3987.904038][   T72]      neigh_parms_alloc+0x1e5/0x510
[ 3987.904038][   T72]      ipv6_add_dev+0x2fe/0x11c0
[ 3987.904038][   T72]      ipv6_find_idev+0x102/0x170
[ 3987.904038][   T72]      inet6_rtm_newaddr+0x37c/0x6b0
[ 3987.904038][   T72]      rtnetlink_rcv_msg+0x2fb/0xbf0
[ 3987.904038][   T72]      netlink_rcv_skb+0x130/0x360
[ 3987.904038][   T72]      netlink_unicast+0x449/0x710
[ 3987.904038][   T72]      netlink_sendmsg+0x723/0xbe0
[ 3987.904038][   T72]      ____sys_sendmsg+0x7b2/0xa10
[ 3987.904038][   T72]      ___sys_sendmsg+0xee/0x170
[ 3987.904038][   T72]      __sys_sendmsg+0xcd/0x170
[ 3987.904038][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.904038][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.904038][   T72] 
[ 3987.905732][   T72] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 3987.905978][   T72] ref_tracker: lo@ffff8880068a15c0 has 1/1 users at
[ 3987.905978][   T72]      dst_init+0x84/0x4a0
[ 3987.905978][   T72]      dst_alloc+0x97/0x150
[ 3987.905978][   T72]      ip6_dst_alloc+0x23/0x90
[ 3987.905978][   T72]      ip6_rt_pcpu_alloc+0x1e6/0x520
[ 3987.905978][   T72]      ip6_pol_route+0x56f/0x840
[ 3987.905978][   T72]      fib6_rule_lookup+0x227/0x600
[ 3987.905978][   T72]      ip6_route_output_flags+0x251/0x460
[ 3987.905978][   T72]      ip6_dst_lookup_tail.constprop.0+0x31c/0xb60
[ 3987.905978][   T72]      ip6_dst_lookup_flow+0x88/0x190
[ 3987.905978][   T72]      ip6_datagram_dst_update+0x52d/0xc60
[ 3987.905978][   T72]      __ip6_datagram_connect+0xa93/0x1050
[ 3987.905978][   T72]      ip6_datagram_connect+0x2c/0x50
[ 3987.905978][   T72]      __sys_connect+0x217/0x2a0
[ 3987.905978][   T72]      __x64_sys_connect+0x72/0xb0
[ 3987.905978][   T72]      do_syscall_64+0xc6/0x1e0
[ 3987.905978][   T72]      entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 3987.905978][   T72]