[ 167.356971][ T10] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4 [ 167.357541][ T10] ref_tracker: ns1eth2@ffff8880053995c0 has 1/3 users at [ 167.357541][ T10] netdev_get_by_index+0x5e/0x80 [ 167.357541][ T10] fib6_nh_init+0x3d8/0x15b0 [ 167.357541][ T10] ip6_route_info_create+0xf18/0x17d0 [ 167.357541][ T10] addrconf_f6i_alloc+0x244/0x410 [ 167.357541][ T10] ipv6_add_addr+0x411/0x2000 [ 167.357541][ T10] inet6_addr_add+0x30e/0xa40 [ 167.357541][ T10] inet6_rtm_newaddr+0x560/0x6b0 [ 167.357541][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.357541][ T10] netlink_rcv_skb+0x130/0x360 [ 167.357541][ T10] netlink_unicast+0x449/0x710 [ 167.357541][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.357541][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.357541][ T10] ___sys_sendmsg+0xee/0x170 [ 167.357541][ T10] __sys_sendmsg+0xcd/0x170 [ 167.357541][ T10] do_syscall_64+0xc6/0x1e0 [ 167.357541][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.357541][ T10] [ 167.360168][ T10] ref_tracker: ns1eth2@ffff8880053995c0 has 1/3 users at [ 167.360168][ T10] ipv6_add_dev+0x3ba/0x11c0 [ 167.360168][ T10] ipv6_find_idev+0x102/0x170 [ 167.360168][ T10] inet6_rtm_newaddr+0x37c/0x6b0 [ 167.360168][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.360168][ T10] netlink_rcv_skb+0x130/0x360 [ 167.360168][ T10] netlink_unicast+0x449/0x710 [ 167.360168][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.360168][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.360168][ T10] ___sys_sendmsg+0xee/0x170 [ 167.360168][ T10] __sys_sendmsg+0xcd/0x170 [ 167.360168][ T10] do_syscall_64+0xc6/0x1e0 [ 167.360168][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.360168][ T10] [ 167.361944][ T10] ref_tracker: ns1eth2@ffff8880053995c0 has 1/3 users at [ 167.361944][ T10] neigh_parms_alloc+0x1e5/0x510 [ 167.361944][ T10] ipv6_add_dev+0x2fe/0x11c0 [ 167.361944][ T10] ipv6_find_idev+0x102/0x170 [ 167.361944][ T10] inet6_rtm_newaddr+0x37c/0x6b0 [ 167.361944][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.361944][ T10] netlink_rcv_skb+0x130/0x360 [ 167.361944][ T10] netlink_unicast+0x449/0x710 [ 167.361944][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.361944][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.361944][ T10] ___sys_sendmsg+0xee/0x170 [ 167.361944][ T10] __sys_sendmsg+0xcd/0x170 [ 167.361944][ T10] do_syscall_64+0xc6/0x1e0 [ 167.361944][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.361944][ T10] [ 167.363892][ T10] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 5 [ 167.364379][ T10] ref_tracker: ns2eth1@ffff88800da2c5c0 has 1/4 users at [ 167.364379][ T10] netdev_get_by_index+0x5e/0x80 [ 167.364379][ T10] fib6_nh_init+0x3d8/0x15b0 [ 167.364379][ T10] ip6_route_info_create+0xf18/0x17d0 [ 167.364379][ T10] addrconf_f6i_alloc+0x19e/0x410 [ 167.364379][ T10] __ipv6_dev_ac_inc+0x25f/0xb10 [ 167.364379][ T10] addrconf_join_anycast+0x1c0/0x220 [ 167.364379][ T10] dev_forward_change+0x2a6/0x7b0 [ 167.364379][ T10] addrconf_fixup_forwarding+0x23f/0x460 [ 167.364379][ T10] addrconf_sysctl_forward+0x212/0x2b0 [ 167.364379][ T10] proc_sys_call_handler+0x403/0x5e0 [ 167.364379][ T10] vfs_write+0x9e5/0x10a0 [ 167.364379][ T10] ksys_write+0xf5/0x1e0 [ 167.364379][ T10] do_syscall_64+0xc6/0x1e0 [ 167.364379][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.364379][ T10] [ 167.366471][ T10] ref_tracker: ns2eth1@ffff88800da2c5c0 has 1/4 users at [ 167.366471][ T10] netdev_get_by_index+0x5e/0x80 [ 167.366471][ T10] fib6_nh_init+0x3d8/0x15b0 [ 167.366471][ T10] ip6_route_info_create+0xf18/0x17d0 [ 167.366471][ T10] addrconf_f6i_alloc+0x244/0x410 [ 167.366471][ T10] ipv6_add_addr+0x411/0x2000 [ 167.366471][ T10] inet6_addr_add+0x30e/0xa40 [ 167.366471][ T10] inet6_rtm_newaddr+0x560/0x6b0 [ 167.366471][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.366471][ T10] netlink_rcv_skb+0x130/0x360 [ 167.366471][ T10] netlink_unicast+0x449/0x710 [ 167.366471][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.366471][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.366471][ T10] ___sys_sendmsg+0xee/0x170 [ 167.366471][ T10] __sys_sendmsg+0xcd/0x170 [ 167.366471][ T10] do_syscall_64+0xc6/0x1e0 [ 167.366471][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.366471][ T10] [ 167.368699][ T10] ref_tracker: ns2eth1@ffff88800da2c5c0 has 1/4 users at [ 167.368699][ T10] ipv6_add_dev+0x3ba/0x11c0 [ 167.368699][ T10] ipv6_find_idev+0x102/0x170 [ 167.368699][ T10] inet6_rtm_newaddr+0x37c/0x6b0 [ 167.368699][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.368699][ T10] netlink_rcv_skb+0x130/0x360 [ 167.368699][ T10] netlink_unicast+0x449/0x710 [ 167.368699][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.368699][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.368699][ T10] ___sys_sendmsg+0xee/0x170 [ 167.368699][ T10] __sys_sendmsg+0xcd/0x170 [ 167.368699][ T10] do_syscall_64+0xc6/0x1e0 [ 167.368699][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.368699][ T10] [ 167.370430][ T10] ref_tracker: ns2eth1@ffff88800da2c5c0 has 1/4 users at [ 167.370430][ T10] neigh_parms_alloc+0x1e5/0x510 [ 167.370430][ T10] ipv6_add_dev+0x2fe/0x11c0 [ 167.370430][ T10] ipv6_find_idev+0x102/0x170 [ 167.370430][ T10] inet6_rtm_newaddr+0x37c/0x6b0 [ 167.370430][ T10] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 167.370430][ T10] netlink_rcv_skb+0x130/0x360 [ 167.370430][ T10] netlink_unicast+0x449/0x710 [ 167.370430][ T10] netlink_sendmsg+0x723/0xbe0 [ 167.370430][ T10] ____sys_sendmsg+0x7b2/0xa10 [ 167.370430][ T10] ___sys_sendmsg+0xee/0x170 [ 167.370430][ T10] __sys_sendmsg+0xcd/0x170 [ 167.370430][ T10] do_syscall_64+0xc6/0x1e0 [ 167.370430][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.370430][ T10] [ 167.372317][ T10] unregister_netdevice: waiting for lo to become free. Usage count = 2 [ 167.372584][ T10] ref_tracker: lo@ffff888009b615c0 has 1/1 users at [ 167.372584][ T10] dst_init+0x84/0x4a0 [ 167.372584][ T10] dst_alloc+0x97/0x150 [ 167.372584][ T10] ip6_dst_alloc+0x23/0x90 [ 167.372584][ T10] ip6_rt_pcpu_alloc+0x1e6/0x520 [ 167.372584][ T10] ip6_pol_route+0x56f/0x840 [ 167.372584][ T10] fib6_rule_lookup+0x227/0x600 [ 167.372584][ T10] ip6_route_output_flags+0x251/0x460 [ 167.372584][ T10] ip6_dst_lookup_tail.constprop.0+0x31c/0xb60 [ 167.372584][ T10] ip6_dst_lookup_flow+0x88/0x190 [ 167.372584][ T10] ip6_datagram_dst_update+0x52d/0xc60 [ 167.372584][ T10] __ip6_datagram_connect+0xa93/0x1050 [ 167.372584][ T10] ip6_datagram_connect+0x2c/0x50 [ 167.372584][ T10] __sys_connect+0x217/0x2a0 [ 167.372584][ T10] __x64_sys_connect+0x72/0xb0 [ 167.372584][ T10] do_syscall_64+0xc6/0x1e0 [ 167.372584][ T10] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 167.372584][ T10]