======================================
| [    1.652134] bond0 (unregistering): Released all slaves
| [    1.652265] ------------[ cut here ]------------
| [    1.652306] WARNING: CPU: 3 PID: 64 at net/core/rtnetlink.c:135 __rtnl_unlock (net/core/rtnetlink.c:135 (discriminator 1))
| [    1.652369] Modules linked in: bonding
[    1.652465] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    1.652514] Workqueue: netns cleanup_net
[    1.652546] RIP: 0010:__rtnl_unlock (net/core/rtnetlink.c:135 (discriminator 1))
[ 1.652585] Code: 28 00 48 85 db 74 1c 48 89 de 31 ff 48 8b 1b ba 02 00 00 00 e8 62 22 fc ff e8 3d 9a 28 00 48 85 db 75 e4 5b c3 cc cc cc cc 90 <0f> 0b 90 eb c7 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
All code
========
   0:	28 00                	sub    %al,(%rax)
   2:	48 85 db             	test   %rbx,%rbx
   5:	74 1c                	je     0x23
   7:	48 89 de             	mov    %rbx,%rsi
   a:	31 ff                	xor    %edi,%edi
   c:	48 8b 1b             	mov    (%rbx),%rbx
   f:	ba 02 00 00 00       	mov    $0x2,%edx
  14:	e8 62 22 fc ff       	call   0xfffffffffffc227b
  19:	e8 3d 9a 28 00       	call   0x289a5b
  1e:	48 85 db             	test   %rbx,%rbx
  21:	75 e4                	jne    0x7
  23:	5b                   	pop    %rbx
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	eb c7                	jmp    0xfffffffffffffff6
  2f:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 00 
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	eb c7                	jmp    0xffffffffffffffcc
   5:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 00 
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[    1.652704] RSP: 0018:ffffb50b4023fd78 EFLAGS: 00010283
[    1.652743] RAX: ffff9138c54f2508 RBX: 0000000000000000 RCX: ffff9138c11f9540
[    1.652793] RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff9138c2ca5000
[    1.652843] RBP: ffffb50b4023fcc0 R08: ffff9138c2d23cc0 R09: ffff9138c1194a10
[    1.652899] R10: ffffb50b4023fca8 R11: ffffb50b4023fcb0 R12: dead000000000122
[    1.652950] R13: dead000000000100 R14: ffff9138c3196b00 R15: 0000000000000000
[    1.653002] FS:  0000000000000000(0000) GS:ffff9138fed80000(0000) knlGS:0000000000000000
[    1.653058] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.653105] CR2: 00007fa77f8b7000 CR3: 0000000009e46002 CR4: 0000000000772ef0
[    1.653161] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    1.653217] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    1.653267] PKRU: 55555554
[    1.653284] Call Trace:
[    1.653302]  <TASK>
[    1.653319] ? __warn (kernel/panic.c:748)
[    1.653351] ? __rtnl_unlock (net/core/rtnetlink.c:135 (discriminator 1))
[    1.653379] ? report_bug (lib/bug.c:201 lib/bug.c:219)
[    1.653421] ? handle_bug (arch/x86/kernel/traps.c:285)
[    1.653452] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1))
[    1.653478] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
[    1.653508] ? __rtnl_unlock (net/core/rtnetlink.c:135 (discriminator 1))
[    1.653533] unregister_netdevice_many_notify (./include/linux/kernel.h:73 net/core/dev.c:11470 net/core/dev.c:11639)
[    1.653574] cleanup_net (net/core/net_namespace.c:648)
[    1.653606] process_one_work (kernel/workqueue.c:3229)
[    1.653636] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[    1.653661] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[    1.653695] kthread (kernel/kthread.c:389)
[    1.653726] ? __pfx_kthread (kernel/kthread.c:342)
[    1.653751] ret_from_fork (arch/x86/kernel/process.c:147)
[    1.653783] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
__rtnl_unlock:unregister_netdevice_many_notify:cleanup_net:process_one_work:worker_thread