======================================
| xx__-> [   15.090974] ------------[ cut here ]------------
| [   15.091110] RTNL: assertion failed at net/core/link_watch.c (59)
| [   15.091192] WARNING: CPU: 1 PID: 64 at net/core/link_watch.c:59 rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
| [   15.091275] Modules linked in: veth
[   15.091395] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.091458] Workqueue: netns cleanup_net
[   15.091502] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 15.091559] Code: 80 3d f3 6e e8 00 00 75 ca c6 05 ea 6e e8 00 01 90 ba 3b 00 00 00 48 c7 c6 f5 98 57 a7 48 c7 c7 d0 91 49 a7 e8 5f b8 57 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 f3 6e e8 00 00 	cmpb   $0x0,0xe86ef3(%rip)        # 0xe86efa
   7:	75 ca                	jne    0xffffffffffffffd3
   9:	c6 05 ea 6e e8 00 01 	movb   $0x1,0xe86eea(%rip)        # 0xe86efa
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 f5 98 57 a7 	mov    $0xffffffffa75798f5,%rsi
  1d:	48 c7 c7 d0 91 49 a7 	mov    $0xffffffffa74991d0,%rdi
  24:	e8 5f b8 57 ff       	call   0xffffffffff57b888
  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
[   15.091732] RSP: 0018:ffffb18980237d10 EFLAGS: 00010286
[   15.091781] RAX: 0000000000000000 RBX: ffffa0a9865c5000 RCX: 00000000ffffdfff
[   15.091856] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   15.091931] RBP: 0000000000000000 R08: ffffffffa7956968 R09: 00000000ffffdfff
[   15.092025] R10: ffffffffa7876980 R11: ffffffffa7926980 R12: dead000000000122
[   15.092100] R13: dead000000000100 R14: ffffffffa757924c R15: ffffa0a9865c6000
[   15.092176] FS:  0000000000000000(0000) GS:ffffa0a9bec80000(0000) knlGS:0000000000000000
[   15.092258] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.092320] CR2: 00007f7ac00102d8 CR3: 0000000025e42001 CR4: 0000000000772ef0
[   15.092395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   15.092472] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   15.092547] PKRU: 55555554
[   15.092571] Call Trace:
[   15.092598]  <TASK>
[   15.092624] ? __warn (kernel/panic.c:748)
[   15.092667] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   15.092705] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[   15.092747] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[   15.092790] ? handle_bug (arch/x86/kernel/traps.c:285)
[   15.092828] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[   15.092865] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[   15.092911] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   15.092953] linkwatch_do_dev (net/core/link_watch.c:180)
[   15.092993] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[   15.093030] ? unregister_netdevice_queue (net/core/dev.c:11456)
[   15.093081] default_device_exit_batch (net/core/dev.c:12077)
[   15.093130] ? sit_exit_batch_rtnl (net/ipv6/sit.c:1812 net/ipv6/sit.c:1886)
[   15.093187] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[   15.093226] process_one_work (kernel/workqueue.c:3229)
[   15.093268] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[   15.093305] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[   15.093356] kthread (kernel/kthread.c:389)
[   15.093400] ? __pfx_kthread (kernel/kthread.c:342)
[   15.093436] ret_from_fork (arch/x86/kernel/process.c:147)
[   15.093480] ? __pfx_kthread (kernel/kthread.c:342)


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