[ 3626.926844][ T72] unregister_netdevice: waiting for ns1eth4 to become free. Usage count = 4 [ 3626.927217][ T72] ref_tracker: ns1eth4@ffff8880064645c0 has 1/3 users at [ 3626.927217][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.927217][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.927217][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.927217][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.927217][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.927217][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.927217][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.927217][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.927217][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.927217][ T72] netlink_unicast+0x449/0x710 [ 3626.927217][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.927217][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.927217][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.927217][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.927217][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.927217][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.927217][ T72] [ 3626.929289][ T72] ref_tracker: ns1eth4@ffff8880064645c0 has 1/3 users at [ 3626.929289][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.929289][ T72] ipv6_find_idev+0x102/0x170 [ 3626.929289][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.929289][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.929289][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.929289][ T72] netlink_unicast+0x449/0x710 [ 3626.929289][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.929289][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.929289][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.929289][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.929289][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.929289][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.929289][ T72] [ 3626.930888][ T72] ref_tracker: ns1eth4@ffff8880064645c0 has 1/3 users at [ 3626.930888][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.930888][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.930888][ T72] ipv6_find_idev+0x102/0x170 [ 3626.930888][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.930888][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.930888][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.930888][ T72] netlink_unicast+0x449/0x710 [ 3626.930888][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.930888][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.930888][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.930888][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.930888][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.930888][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.930888][ T72] [ 3626.932621][ T72] unregister_netdevice: waiting for ns2eth4 to become free. Usage count = 4 [ 3626.932910][ T72] ref_tracker: ns2eth4@ffff8880064415c0 has 1/3 users at [ 3626.932910][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.932910][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.932910][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.932910][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.932910][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.932910][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.932910][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.932910][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.932910][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.932910][ T72] netlink_unicast+0x449/0x710 [ 3626.932910][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.932910][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.932910][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.932910][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.932910][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.932910][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.932910][ T72] [ 3626.934956][ T72] ref_tracker: ns2eth4@ffff8880064415c0 has 1/3 users at [ 3626.934956][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.934956][ T72] ipv6_find_idev+0x102/0x170 [ 3626.934956][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.934956][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.934956][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.934956][ T72] netlink_unicast+0x449/0x710 [ 3626.934956][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.934956][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.934956][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.934956][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.934956][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.934956][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.934956][ T72] [ 3626.936524][ T72] ref_tracker: ns2eth4@ffff8880064415c0 has 1/3 users at [ 3626.936524][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.936524][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.936524][ T72] ipv6_find_idev+0x102/0x170 [ 3626.936524][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.936524][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.936524][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.936524][ T72] netlink_unicast+0x449/0x710 [ 3626.936524][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.936524][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.936524][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.936524][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.936524][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.936524][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.936524][ T72] [ 3626.938204][ T72] unregister_netdevice: waiting for ns1eth3 to become free. Usage count = 4 [ 3626.938473][ T72] ref_tracker: ns1eth3@ffff8880074b95c0 has 1/3 users at [ 3626.938473][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.938473][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.938473][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.938473][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.938473][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.938473][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.938473][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.938473][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.938473][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.938473][ T72] netlink_unicast+0x449/0x710 [ 3626.938473][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.938473][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.938473][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.938473][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.938473][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.938473][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.938473][ T72] [ 3626.940488][ T72] ref_tracker: ns1eth3@ffff8880074b95c0 has 1/3 users at [ 3626.940488][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.940488][ T72] ipv6_find_idev+0x102/0x170 [ 3626.940488][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.940488][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.940488][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.940488][ T72] netlink_unicast+0x449/0x710 [ 3626.940488][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.940488][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.940488][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.940488][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.940488][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.940488][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.940488][ T72] [ 3626.942029][ T72] ref_tracker: ns1eth3@ffff8880074b95c0 has 1/3 users at [ 3626.942029][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.942029][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.942029][ T72] ipv6_find_idev+0x102/0x170 [ 3626.942029][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.942029][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.942029][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.942029][ T72] netlink_unicast+0x449/0x710 [ 3626.942029][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.942029][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.942029][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.942029][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.942029][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.942029][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.942029][ T72] [ 3626.943741][ T72] unregister_netdevice: waiting for ns2eth3 to become free. Usage count = 4 [ 3626.944012][ T72] ref_tracker: ns2eth3@ffff8880056795c0 has 1/3 users at [ 3626.944012][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.944012][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.944012][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.944012][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.944012][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.944012][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.944012][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.944012][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.944012][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.944012][ T72] netlink_unicast+0x449/0x710 [ 3626.944012][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.944012][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.944012][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.944012][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.944012][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.944012][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.944012][ T72] [ 3626.946028][ T72] ref_tracker: ns2eth3@ffff8880056795c0 has 1/3 users at [ 3626.946028][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.946028][ T72] ipv6_find_idev+0x102/0x170 [ 3626.946028][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.946028][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.946028][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.946028][ T72] netlink_unicast+0x449/0x710 [ 3626.946028][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.946028][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.946028][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.946028][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.946028][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.946028][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.946028][ T72] [ 3626.947552][ T72] ref_tracker: ns2eth3@ffff8880056795c0 has 1/3 users at [ 3626.947552][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.947552][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.947552][ T72] ipv6_find_idev+0x102/0x170 [ 3626.947552][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.947552][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.947552][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.947552][ T72] netlink_unicast+0x449/0x710 [ 3626.947552][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.947552][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.947552][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.947552][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.947552][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.947552][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.947552][ T72] [ 3626.949276][ T72] unregister_netdevice: waiting for ns1eth2 to become free. Usage count = 4 [ 3626.949545][ T72] ref_tracker: ns1eth2@ffff8880067e45c0 has 1/3 users at [ 3626.949545][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.949545][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.949545][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.949545][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.949545][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.949545][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.949545][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.949545][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.949545][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.949545][ T72] netlink_unicast+0x449/0x710 [ 3626.949545][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.949545][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.949545][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.949545][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.949545][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.949545][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.949545][ T72] [ 3626.951671][ T72] ref_tracker: ns1eth2@ffff8880067e45c0 has 1/3 users at [ 3626.951671][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.951671][ T72] ipv6_find_idev+0x102/0x170 [ 3626.951671][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.951671][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.951671][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.951671][ T72] netlink_unicast+0x449/0x710 [ 3626.951671][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.951671][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.951671][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.951671][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.951671][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.951671][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.951671][ T72] [ 3626.953408][ T72] ref_tracker: ns1eth2@ffff8880067e45c0 has 1/3 users at [ 3626.953408][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.953408][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.953408][ T72] ipv6_find_idev+0x102/0x170 [ 3626.953408][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.953408][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.953408][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.953408][ T72] netlink_unicast+0x449/0x710 [ 3626.953408][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.953408][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.953408][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.953408][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.953408][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.953408][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.953408][ T72] [ 3626.955336][ T72] unregister_netdevice: waiting for ns2eth2 to become free. Usage count = 4 [ 3626.955603][ T72] ref_tracker: ns2eth2@ffff888005b795c0 has 1/3 users at [ 3626.955603][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.955603][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.955603][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.955603][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.955603][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.955603][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.955603][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.955603][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.955603][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.955603][ T72] netlink_unicast+0x449/0x710 [ 3626.955603][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.955603][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.955603][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.955603][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.955603][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.955603][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.955603][ T72] [ 3626.957732][ T72] ref_tracker: ns2eth2@ffff888005b795c0 has 1/3 users at [ 3626.957732][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.957732][ T72] ipv6_find_idev+0x102/0x170 [ 3626.957732][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.957732][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.957732][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.957732][ T72] netlink_unicast+0x449/0x710 [ 3626.957732][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.957732][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.957732][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.957732][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.957732][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.957732][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.957732][ T72] [ 3626.959456][ T72] ref_tracker: ns2eth2@ffff888005b795c0 has 1/3 users at [ 3626.959456][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.959456][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.959456][ T72] ipv6_find_idev+0x102/0x170 [ 3626.959456][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.959456][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.959456][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.959456][ T72] netlink_unicast+0x449/0x710 [ 3626.959456][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.959456][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.959456][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.959456][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.959456][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.959456][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.959456][ T72] [ 3626.961471][ T72] unregister_netdevice: waiting for ns1eth1 to become free. Usage count = 4 [ 3626.961741][ T72] ref_tracker: ns1eth1@ffff888002dc95c0 has 1/3 users at [ 3626.961741][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.961741][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.961741][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.961741][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.961741][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.961741][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.961741][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.961741][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.961741][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.961741][ T72] netlink_unicast+0x449/0x710 [ 3626.961741][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.961741][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.961741][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.961741][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.961741][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.961741][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.961741][ T72] [ 3626.963987][ T72] ref_tracker: ns1eth1@ffff888002dc95c0 has 1/3 users at [ 3626.963987][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.963987][ T72] ipv6_find_idev+0x102/0x170 [ 3626.963987][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.963987][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.963987][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.963987][ T72] netlink_unicast+0x449/0x710 [ 3626.963987][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.963987][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.963987][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.963987][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.963987][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.963987][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.963987][ T72] [ 3626.965677][ T72] ref_tracker: ns1eth1@ffff888002dc95c0 has 1/3 users at [ 3626.965677][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.965677][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.965677][ T72] ipv6_find_idev+0x102/0x170 [ 3626.965677][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.965677][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.965677][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.965677][ T72] netlink_unicast+0x449/0x710 [ 3626.965677][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.965677][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.965677][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.965677][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.965677][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.965677][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.965677][ T72] [ 3626.967619][ T72] unregister_netdevice: waiting for ns2eth1 to become free. Usage count = 4 [ 3626.967949][ T72] ref_tracker: ns2eth1@ffff8880065345c0 has 1/3 users at [ 3626.967949][ T72] netdev_get_by_index+0x5e/0x80 [ 3626.967949][ T72] fib6_nh_init+0x3d8/0x15b0 [ 3626.967949][ T72] ip6_route_info_create+0xf18/0x17d0 [ 3626.967949][ T72] addrconf_f6i_alloc+0x244/0x410 [ 3626.967949][ T72] ipv6_add_addr+0x411/0x2000 [ 3626.967949][ T72] inet6_addr_add+0x30e/0xa40 [ 3626.967949][ T72] inet6_rtm_newaddr+0x560/0x6b0 [ 3626.967949][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.967949][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.967949][ T72] netlink_unicast+0x449/0x710 [ 3626.967949][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.967949][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.967949][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.967949][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.967949][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.967949][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.967949][ T72] [ 3626.970088][ T72] ref_tracker: ns2eth1@ffff8880065345c0 has 1/3 users at [ 3626.970088][ T72] ipv6_add_dev+0x3ba/0x11c0 [ 3626.970088][ T72] ipv6_find_idev+0x102/0x170 [ 3626.970088][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.970088][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.970088][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.970088][ T72] netlink_unicast+0x449/0x710 [ 3626.970088][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.970088][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.970088][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.970088][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.970088][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.970088][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.970088][ T72] [ 3626.971748][ T72] ref_tracker: ns2eth1@ffff8880065345c0 has 1/3 users at [ 3626.971748][ T72] neigh_parms_alloc+0x1e5/0x510 [ 3626.971748][ T72] ipv6_add_dev+0x2fe/0x11c0 [ 3626.971748][ T72] ipv6_find_idev+0x102/0x170 [ 3626.971748][ T72] inet6_rtm_newaddr+0x37c/0x6b0 [ 3626.971748][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 3626.971748][ T72] netlink_rcv_skb+0x130/0x360 [ 3626.971748][ T72] netlink_unicast+0x449/0x710 [ 3626.971748][ T72] netlink_sendmsg+0x723/0xbe0 [ 3626.971748][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 3626.971748][ T72] ___sys_sendmsg+0xee/0x170 [ 3626.971748][ T72] __sys_sendmsg+0xcd/0x170 [ 3626.971748][ T72] do_syscall_64+0xc6/0x1e0 [ 3626.971748][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 3626.971748][ T72] [ 3627.000669][ T1064] ACPI: PM: Preparing to enter system sleep state S5 [ 3627.002035][ T1064] kvm: exiting hardware virtualization [ 3627.002312][ T1064] reboot: Power down