======================================
| xx__-> [    1.890050] ------------[ cut here ]------------
| [    1.890157] RTNL: assertion failed at net/core/link_watch.c (59)
| [    1.890252] WARNING: CPU: 3 PID: 65 at net/core/link_watch.c:59 rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
| [    1.890369] Modules linked in: veth
[    1.890475] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    1.890534] Workqueue: netns cleanup_net
[    1.890591] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 1.890642] 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 a8 48 c7 c7 d0 91 49 a8 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 a8 	mov    $0xffffffffa85798f5,%rsi
  1d:	48 c7 c7 d0 91 49 a8 	mov    $0xffffffffa84991d0,%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
[    1.890835] RSP: 0018:ffffa5c30023fd10 EFLAGS: 00010286
[    1.890879] RAX: 0000000000000000 RBX: ffff8a1a077ee000 RCX: 00000000ffffdfff
[    1.890943] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    1.891013] RBP: 0000000000000000 R08: ffffffffa8956968 R09: 00000000ffffdfff
[    1.891080] R10: ffffffffa8876980 R11: ffffffffa8926980 R12: dead000000000122
[    1.891150] R13: dead000000000100 R14: ffffffffa857924c R15: ffff8a1a077ed000
[    1.891216] FS:  0000000000000000(0000) GS:ffff8a1a3ed80000(0000) knlGS:0000000000000000
[    1.891288] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.891375] CR2: 00007f265f27b510 CR3: 00000000074b6006 CR4: 0000000000772ef0
[    1.891455] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    1.891517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    1.891587] PKRU: 55555554
[    1.891612] Call Trace:
[    1.891634]  <TASK>
[    1.891661] ? __warn (kernel/panic.c:748)
[    1.891706] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[    1.891742] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[    1.891798] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[    1.891852] ? handle_bug (arch/x86/kernel/traps.c:285)
[    1.891892] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[    1.891928] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[    1.891977] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[    1.892021] linkwatch_do_dev (net/core/link_watch.c:180)
[    1.892061] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[    1.892101] ? unregister_netdevice_queue (net/core/dev.c:11456)
[    1.892174] default_device_exit_batch (net/core/dev.c:12077)
[    1.892224] ? sit_exit_batch_rtnl (net/ipv6/sit.c:1812 net/ipv6/sit.c:1886)
[    1.892275] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[    1.892317] process_one_work (kernel/workqueue.c:3229)
[    1.892359] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[    1.892398] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[    1.892448] kthread (kernel/kthread.c:389)
[    1.892488] ? __pfx_kthread (kernel/kthread.c:342)
[    1.892524] ret_from_fork (arch/x86/kernel/process.c:147)
[    1.892566] ? __pfx_kthread (kernel/kthread.c:342)


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