======================================
| [  563.941002] br1: port 1(lag) entered blocking state
| [  563.941082] br1: port 1(lag) entered forwarding state
| [  582.978077] br1: port 1(lag) entered disabled state
| [  584.033689] Oops: general protection fault, probably for non-canonical address 0xdead000000000122: 0000 [#1] PREEMPT SMP NOPTI
[  584.033883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  584.033948] Workqueue: events_unbound linkwatch_event
[  584.033987] RIP: 0010:neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[ 584.034021] Code: 89 d6 48 83 ed 10 0f 84 08 01 00 00 48 8b 5d 10 45 84 f6 74 0d 80 bd 9c 00 00 00 00 0f 88 e0 00 00 00 48 8b 45 00 48 8b 55 08 <48> 89 02 48 85 c0 74 04 48 89 50 08 48 8b 45 10 48 8b 55 18 4c 89
All code
========
   0:	89 d6                	mov    %edx,%esi
   2:	48 83 ed 10          	sub    $0x10,%rbp
   6:	0f 84 08 01 00 00    	je     0x114
   c:	48 8b 5d 10          	mov    0x10(%rbp),%rbx
  10:	45 84 f6             	test   %r14b,%r14b
  13:	74 0d                	je     0x22
  15:	80 bd 9c 00 00 00 00 	cmpb   $0x0,0x9c(%rbp)
  1c:	0f 88 e0 00 00 00    	js     0x102
  22:	48 8b 45 00          	mov    0x0(%rbp),%rax
  26:	48 8b 55 08          	mov    0x8(%rbp),%rdx
  2a:*	48 89 02             	mov    %rax,(%rdx)		<-- trapping instruction
  2d:	48 85 c0             	test   %rax,%rax
  30:	74 04                	je     0x36
  32:	48 89 50 08          	mov    %rdx,0x8(%rax)
  36:	48 8b 45 10          	mov    0x10(%rbp),%rax
  3a:	48 8b 55 18          	mov    0x18(%rbp),%rdx
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 89 02             	mov    %rax,(%rdx)
   3:	48 85 c0             	test   %rax,%rax
   6:	74 04                	je     0xc
   8:	48 89 50 08          	mov    %rdx,0x8(%rax)
   c:	48 8b 45 10          	mov    0x10(%rbp),%rax
  10:	48 8b 55 18          	mov    0x18(%rbp),%rdx
  14:	4c                   	rex.WR
  15:	89                   	.byte 0x89
[  584.034118] RSP: 0018:ffffb122801efd40 EFLAGS: 00010202
[  584.034148] RAX: ffff95d941915800 RBX: ffff95d94264ae10 RCX: 0000000000001388
[  584.034195] RDX: dead000000000122 RSI: 0000000000000286 RDI: ffff95d97ec9d070
[  584.034238] RBP: ffff95d944070600 R08: ffff95d941b363fc R09: ffff95d97ec9cf40
[  584.034277] R10: ffff95d97ec9cf58 R11: 0000000000000104 R12: ffffffff93427160
[  584.034321] R13: dead000000000122 R14: 0000000000000001 R15: ffff95d94264b640
[  584.034367] FS:  0000000000000000(0000) GS:ffff95d97ec80000(0000) knlGS:0000000000000000
[  584.034415] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  584.034451] CR2: 00007f0eefef5000 CR3: 0000000009c40003 CR4: 0000000000772ef0
[  584.034496] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  584.034546] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  584.034585] PKRU: 55555554
[  584.034598] Call Trace:
[  584.034618]  <TASK>
[  584.034640] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[  584.034670] ? exc_general_protection (arch/x86/kernel/traps.c:748 arch/x86/kernel/traps.c:693) 
[  584.034702] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[  584.034738] ? neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[  584.034770] __neigh_ifdown.isra.0 (net/core/neighbour.c:425) 
[  584.034803] neigh_carrier_down (net/core/neighbour.c:438) 
[  584.034828] arp_netdev_event (net/ipv4/arp.c:1343) 
[  584.034860] notifier_call_chain (kernel/notifier.c:93) 
[  584.034892] netdev_state_change (net/core/dev.c:1380 net/core/dev.c:1371) 
[  584.034924] linkwatch_do_dev (net/core/link_watch.c:177) 
[  584.034950] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:236) 
[  584.034980] linkwatch_event (net/core/link_watch.c:278) 
[  584.035005] process_one_work (kernel/workqueue.c:3229) 
[  584.035033] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) 
[  584.035058] ? __pfx_worker_thread (kernel/workqueue.c:3337) 
[  584.035090] kthread (kernel/kthread.c:389) 
[  584.035117] ? __pfx_kthread (kernel/kthread.c:342) 
[  584.035143] ret_from_fork (arch/x86/kernel/process.c:147) 
[  584.035170] ? __pfx_kthread (kernel/kthread.c:342) 


Finger prints:
neigh_carrier_down:arp_netdev_event:notifier_call_chain:netdev_state_change:linkwatch_do_dev