======================================
| [  282.870405][   T11] ------------[ cut here ]------------
| [  282.870920][   T11] RTNL: assertion failed at net/core/link_watch.c (59)
| [ 282.871221][ T11] WARNING: CPU: 0 PID: 11 at net/core/link_watch.c:59 default_operstate (net/core/link_watch.c:59 (discriminator 3))
| [  282.871673][   T11] Modules linked in: macvlan act_mirred ip6_gre ip6_tunnel tunnel6 cls_matchall ip_gre gre vxlan ip6_udp_tunnel udp_tunnel sch_tbf sch_prio bridge stp llc act_gact cls_flower sch_ingress 8021q vrf veth
[  282.873087][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  282.873309][   T11] Workqueue: netns cleanup_net
[ 282.873577][ T11] RIP: 0010:default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 282.873768][ T11] Code: 83 e4 01 0f 85 03 ff ff ff c6 05 2e 39 3a 02 01 90 ba 3b 00 00 00 48 c7 c6 00 2b 97 ad 48 c7 c7 40 2b 97 ad e8 13 95 ea fd 90 <0f> 0b 90 90 e9 d9 fe ff ff 48 89 ef e8 d1 bb 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 2e 39 3a 02 01 	movb   $0x1,0x23a392e(%rip)        # 0x23a393e
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 00 2b 97 ad 	mov    $0xffffffffad972b00,%rsi
  1d:	48 c7 c7 40 2b 97 ad 	mov    $0xffffffffad972b40,%rdi
  24:	e8 13 95 ea fd       	call   0xfffffffffdea953c
  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 d1 bb 71 fe       	call   0xfffffffffe71bc0c
  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 d1 bb 71 fe       	call   0xfffffffffe71bbe2
  11:	e9 f7 fd ff ff       	jmp    0xfffffffffffffe0d
[  282.874353][   T11] RSP: 0018:ffffc900000b7ae8 EFLAGS: 00010286
[  282.874605][   T11] RAX: 0000000000000000 RBX: ffff888005ca9000 RCX: 1ffffffff5c3b58c
[  282.874852][   T11] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  282.875104][   T11] RBP: 0000000000000012 R08: 0000000000000000 R09: fffffbfff5c3b58c
[  282.875414][   T11] R10: 0000000000000003 R11: ffff888001a82300 R12: 0000000000000000
[  282.875777][   T11] R13: dffffc0000000000 R14: ffff88800fbc4000 R15: ffff888005ca95b0
[  282.876020][   T11] FS:  0000000000000000(0000) GS:ffff88802f600000(0000) knlGS:0000000000000000
[  282.876315][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  282.876560][   T11] CR2: 000055d7168d1dec CR3: 00000000098a8004 CR4: 0000000000772ef0
[  282.876824][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  282.877141][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  282.877442][   T11] PKRU: 55555554
[  282.877614][   T11] Call Trace:
[  282.877761][   T11]  <TASK>
[ 282.877844][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 282.878006][ T11] ? __warn (kernel/panic.c:748)
[ 282.878126][ T11] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[ 282.878380][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 282.878553][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[ 282.878737][ T11] ? handle_bug (arch/x86/kernel/traps.c:285)
[ 282.878854][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[ 282.879003][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[ 282.879183][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 282.879481][ T11] ? default_operstate (net/core/link_watch.c:59 (discriminator 3))
[ 282.879686][ T11] rfc2863_policy (net/core/link_watch.c:78)
[ 282.879845][ T11] linkwatch_do_dev (net/core/link_watch.c:180)
[ 282.879997][ T11] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[ 282.880155][ T11] ? __pfx_netdev_run_todo (net/core/dev.c:10867)
[ 282.880400][ 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)
[ 282.880568][ 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)
[ 282.880759][ T11] cleanup_net (net/core/net_namespace.c:647)
[ 282.880915][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 282.881077][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592)
[ 282.881232][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 282.881461][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 282.881620][ T11] ? process_one_work (kernel/workqueue.c:3205)
[ 282.881779][ T11] process_one_work (kernel/workqueue.c:3229)
[ 282.881940][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 282.882093][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131)
[ 282.882265][ T11] ? assign_work (kernel/workqueue.c:1200)
[ 282.882509][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[ 282.882712][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 282.882864][ T11] kthread (kernel/kthread.c:389)
[ 282.882984][ T11] ? __pfx_kthread (kernel/kthread.c:342)
[ 282.883141][ T11] ret_from_fork (arch/x86/kernel/process.c:147)
[ 282.883312][ T11] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
default_operstate:rfc2863_policy:linkwatch_do_dev:netdev_run_todo:cleanup_net