======================================
| [   52.545183] ------------[ cut here ]------------
| [   52.545252] RTNL: assertion failed at net/core/link_watch.c (59)
| [   52.545357] 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)
| [   52.545444] Modules linked in: act_gact cls_flower vxlan ip6_udp_tunnel udp_tunnel bridge stp llc sch_ingress vrf veth
[   52.545641] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   52.545696] Workqueue: netns cleanup_net
[   52.545730] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 52.545770] Code: 80 3d 03 5d e8 00 00 75 ca c6 05 fa 5c e8 00 01 90 ba 3b 00 00 00 48 c7 c6 08 22 98 a6 48 c7 c7 28 0d 8a a6 e8 ef 95 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 03 5d e8 00 00 	cmpb   $0x0,0xe85d03(%rip)        # 0xe85d0a
   7:	75 ca                	jne    0xffffffffffffffd3
   9:	c6 05 fa 5c e8 00 01 	movb   $0x1,0xe85cfa(%rip)        # 0xe85d0a
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 08 22 98 a6 	mov    $0xffffffffa6982208,%rsi
  1d:	48 c7 c7 28 0d 8a a6 	mov    $0xffffffffa68a0d28,%rdi
  24:	e8 ef 95 57 ff       	call   0xffffffffff579618
  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
[   52.545890] RSP: 0018:ffffb0f380237d10 EFLAGS: 00010286
[   52.545929] RAX: 0000000000000000 RBX: ffff8c8785ace000 RCX: 00000000ffffdfff
[   52.545988] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   52.546050] RBP: 0000000000000000 R08: ffffffffa6d56968 R09: 00000000ffffdfff
[   52.546107] R10: ffffffffa6c76980 R11: ffffffffa6d26980 R12: dead000000000122
[   52.546165] R13: dead000000000100 R14: ffffffffa6981b5f R15: ffff8c8785acf000
[   52.546222] FS:  0000000000000000(0000) GS:ffff8c87bec80000(0000) knlGS:0000000000000000
[   52.546286] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.546333] CR2: 00007f6aab687270 CR3: 000000000315a002 CR4: 0000000000772ef0
[   52.546383] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   52.546437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   52.546487] PKRU: 55555554
[   52.546503] Call Trace:
[   52.546523]  <TASK>
[   52.546549] ? __warn (kernel/panic.c:748)
[   52.546583] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   52.546612] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[   52.546644] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[   52.546674] ? handle_bug (arch/x86/kernel/traps.c:285)
[   52.546704] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[   52.546736] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[   52.546770] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[   52.546795] linkwatch_do_dev (net/core/link_watch.c:180)
[   52.546820] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[   52.546851] ? unregister_netdevice_queue (net/core/dev.c:11456)
[   52.546891] default_device_exit_batch (net/core/dev.c:12077)
[   52.546925] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[   52.546957] process_one_work (kernel/workqueue.c:3229)
[   52.547005] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[   52.547039] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[   52.547081] kthread (kernel/kthread.c:389)
[   52.547112] ? __pfx_kthread (kernel/kthread.c:342)
[   52.547138] ret_from_fork (arch/x86/kernel/process.c:147)
[   52.547169] ? __pfx_kthread (kernel/kthread.c:342)


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