======================================
| [   77.652235][   T11] ------------[ cut here ]------------
| [   77.652573][   T11] RTNL: assertion failed at net/core/link_watch.c (59)
| [ 77.652827][ T11] WARNING: CPU: 3 PID: 11 at net/core/link_watch.c:59 default_operstate (net/core/link_watch.c:59 (discriminator 3))
| [   77.653143][   T11] Modules linked in: nf_conntrack_netlink nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sctp_diag nft_limit tcp_diag inet_diag nfnetlink_queue nft_queue nf_tables veth sctp ip6_udp_tunnel udp_tunnel libcrc32c
[   77.654219][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   77.654460][   T11] Workqueue: netns cleanup_net
[ 77.654645][ T11] RIP: 0010:default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 77.654819][ T11] Code: 83 e4 01 0f 85 03 ff ff ff c6 05 09 a7 37 02 01 90 ba 3b 00 00 00 48 c7 c6 a0 67 97 a3 48 c7 c7 e0 67 97 a3 e8 c3 8b e7 fd 90 <0f> 0b 90 90 e9 d9 fe ff ff 48 89 ef e8 11 be 71 fe e9 f7 fd ff ff
All code
========
   0:	83 e4 01             	and    $0x1,%esp
   3:	0f 85 03 ff ff ff    	jne    0xffffffffffffff0c
   9:	c6 05 09 a7 37 02 01 	movb   $0x1,0x237a709(%rip)        # 0x237a719
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 a0 67 97 a3 	mov    $0xffffffffa39767a0,%rsi
  1d:	48 c7 c7 e0 67 97 a3 	mov    $0xffffffffa39767e0,%rdi
  24:	e8 c3 8b e7 fd       	call   0xfffffffffde78bec
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 d9 fe ff ff       	jmp    0xffffffffffffff0c
  33:	48 89 ef             	mov    %rbp,%rdi
  36:	e8 11 be 71 fe       	call   0xfffffffffe71be4c
  3b:	e9 f7 fd ff ff       	jmp    0xfffffffffffffe37

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 d9 fe ff ff       	jmp    0xfffffffffffffee2
   9:	48 89 ef             	mov    %rbp,%rdi
   c:	e8 11 be 71 fe       	call   0xfffffffffe71be22
  11:	e9 f7 fd ff ff       	jmp    0xfffffffffffffe0d
[   77.655452][   T11] RSP: 0018:ffffc900000b7a48 EFLAGS: 00010282
[   77.655686][   T11] RAX: 0000000000000000 RBX: ffff888008fd4000 RCX: 1ffffffff483b678
[   77.655939][   T11] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[   77.656213][   T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff483b678
[   77.656479][   T11] R10: 0000000000000003 R11: ffff888001a82300 R12: 0000000000000000
[   77.656734][   T11] R13: dffffc0000000000 R14: ffff888009391000 R15: ffff888008fd45b0
[   77.657004][   T11] FS:  0000000000000000(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   77.657299][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   77.657531][   T11] CR2: 000055c5035993d8 CR3: 000000000b5cc004 CR4: 0000000000772ef0
[   77.657963][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   77.658213][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   77.658474][   T11] PKRU: 55555554
[   77.658604][   T11] Call Trace:
[   77.658734][   T11]  <TASK>
[ 77.658827][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 77.659002][ T11] ? __warn (kernel/panic.c:748)
[ 77.659135][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 77.659303][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[ 77.659486][ T11] ? handle_bug (arch/x86/kernel/traps.c:285)
[ 77.659616][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[ 77.659785][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[ 77.659959][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 77.660148][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 77.660317][ T11] rfc2863_policy (net/core/link_watch.c:78)
[ 77.660497][ T11] linkwatch_do_dev (net/core/link_watch.c:180)
[ 77.660664][ T11] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[ 77.660835][ T11] ? __pfx_netdev_run_todo (net/core/dev.c:10867)
[ 77.661007][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11455)
[ 77.661223][ T11] default_device_exit_batch (net/core/dev.c:12051)
[ 77.661411][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:12051)
[ 77.661623][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:66)
[ 77.661792][ T11] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:585 net/ipv4/nexthop.c:2158 net/ipv4/nexthop.c:2666 net/ipv4/nexthop.c:4010)
[ 77.662008][ T11] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[ 77.662176][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 77.662346][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592)
[ 77.662522][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 77.662698][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 77.662866][ T11] ? process_one_work (kernel/workqueue.c:3205)
[ 77.663043][ T11] process_one_work (kernel/workqueue.c:3229)
[ 77.663223][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 77.663390][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131)
[ 77.663578][ T11] ? assign_work (kernel/workqueue.c:1200)
[ 77.663751][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[ 77.663938][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 77.664116][ T11] kthread (kernel/kthread.c:389)
[ 77.664254][ T11] ? __pfx_kthread (kernel/kthread.c:342)
[ 77.664430][ T11] ret_from_fork (arch/x86/kernel/process.c:147)
[ 77.664614][ T11] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
default_operstate:rfc2863_policy:linkwatch_do_dev:netdev_run_todo:default_device_exit_batch