======================================
| [  231.756283] ------------[ cut here ]------------
| [  231.756418] RTNL: assertion failed at net/core/link_watch.c (59)
| [  231.756523] WARNING: CPU: 2 PID: 11 at net/core/link_watch.c:59 rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
| [  231.756624] Modules linked in: act_tunnel_key cls_matchall vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress ip6_gre ip6_tunnel tunnel6 gre dummy bridge stp llc 8021q vrf veth
[  231.756916] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  231.757010] Workqueue: netns cleanup_net
[  231.757069] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 231.757137] 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 d8 a1 48 c7 c7 28 0d ca a1 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 d8 a1 	mov    $0xffffffffa1d82208,%rsi
  1d:	48 c7 c7 28 0d ca a1 	mov    $0xffffffffa1ca0d28,%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
[  231.757339] RSP: 0018:ffffac2b8005fd10 EFLAGS: 00010286
[  231.757410] RAX: 0000000000000000 RBX: ffff9d0b06268000 RCX: 00000000ffffdfff
[  231.757501] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  231.757592] RBP: 0000000000000000 R08: ffffffffa2156968 R09: 00000000ffffdfff
[  231.757697] R10: ffffffffa2076980 R11: ffffffffa2126980 R12: dead000000000122
[  231.757790] R13: dead000000000100 R14: ffffffffa1d81b5f R15: ffff9d0b06269000
[  231.757882] FS:  0000000000000000(0000) GS:ffff9d0b3ed00000(0000) knlGS:0000000000000000
[  231.757979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  231.758081] CR2: 00007f64944a439a CR3: 0000000006c2e001 CR4: 0000000000772ef0
[  231.758176] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  231.758274] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  231.758362] PKRU: 55555554
[  231.758408] Call Trace:
[  231.758472]  <TASK>
[  231.758522] ? __warn (kernel/panic.c:748)
[  231.758602] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[  231.758661] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[  231.758734] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[  231.758807] ? handle_bug (arch/x86/kernel/traps.c:285)
[  231.758866] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[  231.758937] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[  231.759015] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[  231.759076] linkwatch_do_dev (net/core/link_watch.c:180)
[  231.759135] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[  231.759208] ? unregister_netdevice_queue (net/core/dev.c:11456)
[  231.759293] default_device_exit_batch (net/core/dev.c:12077)
[  231.759372] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[  231.759428] process_one_work (kernel/workqueue.c:3229)
[  231.759497] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[  231.759557] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[  231.759629] kthread (kernel/kthread.c:389)
[  231.759672] ? __pfx_kthread (kernel/kthread.c:342)
[  231.759739] ret_from_fork (arch/x86/kernel/process.c:147)
[  231.759819] ? __pfx_kthread (kernel/kthread.c:342)


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