======================================
| [   33.517930] ------------[ cut here ]------------
| [   33.518021] RTNL: assertion failed at net/core/link_watch.c (59)
| [   33.518107] WARNING: CPU: 0 PID: 374 at net/core/link_watch.c:59 rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
| [   33.518193] Modules linked in:
[   33.518320] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   33.518383] Workqueue: netns cleanup_net
[   33.518434] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 33.518490] Code: 80 3d 71 85 e6 00 00 75 ca c6 05 68 85 e6 00 01 90 ba 3b 00 00 00 48 c7 c6 9f 2c f9 88 48 c7 c7 90 e0 ea 88 e8 2f b5 55 ff 90 <0f> 0b 90 90 eb a3 83 f8 06 0f 85 14 ff ff ff b8 05 00 00 00 e9 0a
All code
========
   0:	80 3d 71 85 e6 00 00 	cmpb   $0x0,0xe68571(%rip)        # 0xe68578
   7:	75 ca                	jne    0xffffffffffffffd3
   9:	c6 05 68 85 e6 00 01 	movb   $0x1,0xe68568(%rip)        # 0xe68578
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 9f 2c f9 88 	mov    $0xffffffff88f92c9f,%rsi
  1d:	48 c7 c7 90 e0 ea 88 	mov    $0xffffffff88eae090,%rdi
  24:	e8 2f b5 55 ff       	call   0xffffffffff55b558
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	eb a3                	jmp    0xffffffffffffffd3
  30:	83 f8 06             	cmp    $0x6,%eax
  33:	0f 85 14 ff ff ff    	jne    0xffffffffffffff4d
  39:	b8 05 00 00 00       	mov    $0x5,%eax
  3e:	e9                   	.byte 0xe9
  3f:	0a                   	.byte 0xa

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	eb a3                	jmp    0xffffffffffffffa9
   6:	83 f8 06             	cmp    $0x6,%eax
   9:	0f 85 14 ff ff ff    	jne    0xffffffffffffff23
   f:	b8 05 00 00 00       	mov    $0x5,%eax
  14:	e9                   	.byte 0xe9
  15:	0a                   	.byte 0xa
[   33.518672] RSP: 0018:ffffad3a80967d10 EFLAGS: 00010286
[   33.518729] RAX: 0000000000000000 RBX: ffff8fc201dbe000 RCX: 00000000ffffdfff
[   33.518812] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   33.518895] RBP: 0000000000000000 R08: ffffffff89356968 R09: 00000000ffffdfff
[   33.518978] R10: ffffffff89276980 R11: ffffffff89326980 R12: dead000000000122
[   33.519061] R13: dead000000000100 R14: ffffffff88f92610 R15: ffff8fc203091000
[   33.519145] FS:  0000000000000000(0000) GS:ffff8fc23ec00000(0000) knlGS:0000000000000000
[   33.519228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.519294] CR2: 00007fc3cb0cd8e8 CR3: 000000000a842003 CR4: 0000000000772ef0
[   33.519370] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.519448] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.519526] PKRU: 55555554
[   33.519549] Call Trace:
[   33.519577]  <TASK>
[   33.519609] ? __warn (kernel/panic.c:748)
[   33.519659] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   33.519703] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[   33.519749] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[   33.519795] ? handle_bug (arch/x86/kernel/traps.c:285)
[   33.519840] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[   33.519885] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[   33.519938] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   33.519985] linkwatch_do_dev (net/core/link_watch.c:180)
[   33.520030] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[   33.520076] ? unregister_netdevice_queue (net/core/dev.c:11456)
[   33.520133] default_device_exit_batch (net/core/dev.c:12077)
[   33.520191] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[   33.520239] process_one_work (kernel/workqueue.c:3229)
[   33.520285] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[   33.520329] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[   33.520387] kthread (kernel/kthread.c:389)
[   33.520432] ? __pfx_kthread (kernel/kthread.c:342)
[   33.520479] ret_from_fork (arch/x86/kernel/process.c:147)
[   33.520525] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
rfc2863_policy:linkwatch_do_dev:netdev_run_todo:default_device_exit_batch:cleanup_net