======================================
| [   12.871521] #PF: supervisor read access in kernel mode
| [   12.871541] #PF: error_code(0x0000) - not-present page
| [   12.871561] PGD 790f067 P4D 0
| [   12.871578] Oops: Oops: 0000 [#1] SMP
[   12.871626] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.871650] Workqueue: netns cleanup_net
[   12.871671] RIP: 0010:macvlan_port_release_mac (drivers/net/macvlan.c:128 (discriminator 1) drivers/net/macvlan.c:803 (discriminator 1)) macvlan
[   12.871696] Code: 10 eb d9 0f 1f 40 00 0f 1f 44 00 00 48 81 ec 88 00 00 00 65 48 8b 05 cc 4a b4 c2 48 89 84 24 80 00 00 00 48 8b 87 00 01 00 00 <f6> 80 58 08 00 00 01 74 24 48 8b 10 48 8b 92 48 04 00 00 8b 0a 0f
All code
========
   0:	10 eb                	adc    %ch,%bl
   2:	d9 0f                	(bad) (%rdi)
   4:	1f                   	(bad)
   5:	40 00 0f             	rex add %cl,(%rdi)
   8:	1f                   	(bad)
   9:	44 00 00             	add    %r8b,(%rax)
   c:	48 81 ec 88 00 00 00 	sub    $0x88,%rsp
  13:	65 48 8b 05 cc 4a b4 	mov    %gs:-0x3d4bb534(%rip),%rax        # 0xffffffffc2b44ae7
  1a:	c2 
  1b:	48 89 84 24 80 00 00 	mov    %rax,0x80(%rsp)
  22:	00 
  23:	48 8b 87 00 01 00 00 	mov    0x100(%rdi),%rax
  2a:*	f6 80 58 08 00 00 01 	testb  $0x1,0x858(%rax)		<-- trapping instruction
  31:	74 24                	je     0x57
  33:	48 8b 10             	mov    (%rax),%rdx
  36:	48 8b 92 48 04 00 00 	mov    0x448(%rdx),%rdx
  3d:	8b 0a                	mov    (%rdx),%ecx
  3f:	0f                   	.byte 0xf

Code starting with the faulting instruction
===========================================
   0:	f6 80 58 08 00 00 01 	testb  $0x1,0x858(%rax)
   7:	74 24                	je     0x2d
   9:	48 8b 10             	mov    (%rax),%rdx
   c:	48 8b 92 48 04 00 00 	mov    0x448(%rdx),%rdx
  13:	8b 0a                	mov    (%rdx),%ecx
  15:	0f                   	.byte 0xf
[   12.871762] RSP: 0018:ff62de6d0023faa0 EFLAGS: 00010286
[   12.871782] RAX: 0000000000000000 RBX: ff11f817c7802000 RCX: 0000000000000000
[   12.871806] RDX: 0000000000000000 RSI: ff11f817c7802818 RDI: ff11f817c6573000
[   12.871836] RBP: ff11f817c7802818 R08: ff11f817c1403e48 R09: ffffffff82a6e260
[   12.871862] R10: 0000000000000000 R11: 0000000000000000 R12: ff11f817c6573000
[   12.871885] R13: ff11f817c1897d00 R14: ff11f817c1c35d00 R15: 0000000000000003
[   12.871915] FS:  0000000000000000(0000) GS:ff11f8187ba7c000(0000) knlGS:0000000000000000
[   12.871945] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.871972] CR2: 0000000000000858 CR3: 00000000044dc002 CR4: 0000000000771ef0
[   12.871997] PKRU: 55555554
[   12.872006] Call Trace:
[   12.872016]  <TASK>
[   12.872027]  ? enable_work (kernel/workqueue.c:2200 kernel/workqueue.c:4624)
[   12.872047]  ? cancel_work_sync (kernel/workqueue.c:4497 kernel/workqueue.c:4531)
[   12.872062] macvlan_port_destroy (drivers/net/macvlan.c:1344) macvlan
[   12.872086]  unregister_netdevice_many_notify (net/core/dev.c:12460)
[   12.872110] macvlan_device_event (drivers/net/macvlan.c:1925) macvlan
[   12.872135]  notifier_call_chain (kernel/notifier.c:85)
[   12.872152]  unregister_netdevice_many_notify (net/core/dev.c:2291 net/core/dev.c:2305 net/core/dev.c:12441)
[   12.872172] vlan_device_event (net/8021q/vlan.c:455) 8021q
[   12.872195]  notifier_call_chain (kernel/notifier.c:85)
[   12.872212]  unregister_netdevice_many_notify (net/core/dev.c:2291 net/core/dev.c:2305 net/core/dev.c:12441)
[   12.872228]  ops_undo_list (net/core/net_namespace.c:187 net/core/net_namespace.c:248)
[   12.872242]  cleanup_net (net/core/net_namespace.c:702)
[   12.872257]  process_one_work (kernel/workqueue.c:3322)
[   12.872272]  worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486)
[   12.872290]  ? rescuer_thread (kernel/workqueue.c:3680)
[   12.872303]  kthread (kernel/kthread.c:436)
[   12.872317]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   12.872333]  ret_from_fork (arch/x86/kernel/process.c:158)
[   12.872348]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))


Finger prints:
macvlan_port_release_mac:macvlan_port_destroy:unregister_netdevice_many_notify:macvlan_device_event:notifier_call_chain