======================================
| [  154.001216] ------------[ cut here ]------------
| [  154.001297] RTNL: assertion failed at net/core/link_watch.c (59)
| [  154.001389] WARNING: CPU: 0 PID: 64 at net/core/link_watch.c:59 rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
| [  154.001479] Modules linked in: mptcp_diag tcp_diag inet_diag nft_tproxy nf_tproxy_ipv6 nf_tproxy_ipv4 nft_socket nf_socket_ipv4 nf_socket_ipv6 nf_tables sch_netem
[  154.001703] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  154.001748] Workqueue: netns cleanup_net
[  154.001798] RIP: 0010:rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[ 154.001853] Code: 80 3d 73 fc e8 00 00 75 ca c6 05 6a fc e8 00 01 90 ba 3b 00 00 00 48 c7 c6 08 bc 38 b0 48 c7 c7 e0 9d 2a b0 e8 7f c0 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 73 fc e8 00 00 	cmpb   $0x0,0xe8fc73(%rip)        # 0xe8fc7a
   7:	75 ca                	jne    0xffffffffffffffd3
   9:	c6 05 6a fc e8 00 01 	movb   $0x1,0xe8fc6a(%rip)        # 0xe8fc7a
  10:	90                   	nop
  11:	ba 3b 00 00 00       	mov    $0x3b,%edx
  16:	48 c7 c6 08 bc 38 b0 	mov    $0xffffffffb038bc08,%rsi
  1d:	48 c7 c7 e0 9d 2a b0 	mov    $0xffffffffb02a9de0,%rdi
  24:	e8 7f c0 57 ff       	call   0xffffffffff57c0a8
  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
[  154.002024] RSP: 0018:ffffb63a80237d10 EFLAGS: 00010286
[  154.002075] RAX: 0000000000000000 RBX: ffff9d1284b4c000 RCX: 00000000ffffdfff
[  154.002159] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  154.002241] RBP: 0000000000000000 R08: ffffffffb075c968 R09: 00000000ffffdfff
[  154.002331] R10: ffffffffb067c980 R11: ffffffffb072c980 R12: dead000000000122
[  154.002416] R13: dead000000000100 R14: ffffffffb038b55f R15: ffff9d1284b4d000
[  154.002497] FS:  0000000000000000(0000) GS:ffff9d12bec00000(0000) knlGS:0000000000000000
[  154.002582] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  154.002653] CR2: 00007fb050f2d470 CR3: 0000000031048002 CR4: 0000000000772ef0
[  154.002739] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  154.002823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  154.002894] PKRU: 55555554
[  154.002918] Call Trace:
[  154.002948]  <TASK>
[  154.002982] ? __warn (kernel/panic.c:748)
[  154.003033] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[  154.003082] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[  154.003141] ? prb_read_valid (kernel/printk/printk_ringbuffer.c:2183)
[  154.003188] ? handle_bug (arch/x86/kernel/traps.c:285)
[  154.003236] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[  154.003285] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[  154.003331] ? rfc2863_policy (net/core/link_watch.c:59 net/core/link_watch.c:76)
[  154.003375] linkwatch_do_dev (net/core/link_watch.c:180)
[  154.003420] netdev_run_todo (net/core/dev.c:10894 (discriminator 2))
[  154.003467] ? unregister_netdevice_queue (net/core/dev.c:11456)
[  154.003521] default_device_exit_batch (net/core/dev.c:12077)
[  154.003579] ? sit_exit_batch_rtnl (net/ipv6/sit.c:1812 net/ipv6/sit.c:1886)
[  154.003637] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[  154.003683] process_one_work (kernel/workqueue.c:3229)
[  154.003732] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[  154.003778] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[  154.003836] kthread (kernel/kthread.c:389)
[  154.003880] ? __pfx_kthread (kernel/kthread.c:342)
[  154.003926] ret_from_fork (arch/x86/kernel/process.c:147)
[  154.003975] ? __pfx_kthread (kernel/kthread.c:342)


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