======================================
| [   46.729427] #PF: supervisor read access in kernel mode
| [   46.729457] #PF: error_code(0x0000) - not-present page
| [   46.729489] PGD 432c067 P4D 432c067 PUD 0
| [   46.729519] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
[   46.729601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   46.729664] Workqueue: events_unbound linkwatch_event
[   46.729700] RIP: 0010:neigh_flush_dev.isra.0 (net/core/neighbour.c:380) 
[ 46.729736] Code: 55 53 48 8b ac c6 70 09 00 00 48 85 ed 0f 84 1f 01 00 00 49 bd 22 01 00 00 00 00 ad de 41 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
All code
========
   0:	55                   	push   %rbp
   1:	53                   	push   %rbx
   2:	48 8b ac c6 70 09 00 	mov    0x970(%rsi,%rax,8),%rbp
   9:	00 
   a:	48 85 ed             	test   %rbp,%rbp
   d:	0f 84 1f 01 00 00    	je     0x132
  13:	49 bd 22 01 00 00 00 	movabs $0xdead000000000122,%r13
  1a:	00 ad de 
  1d:	41 89 d6             	mov    %edx,%r14d
  20:	48 83 ed 10          	sub    $0x10,%rbp
  24:	0f 84 08 01 00 00    	je     0x132
  2a:*	48 8b 5d 10          	mov    0x10(%rbp),%rbx		<-- trapping instruction
  2e:	45 84 f6             	test   %r14b,%r14b
  31:	74 0d                	je     0x40
  33:	80 bd 9c 00 00 00 00 	cmpb   $0x0,0x9c(%rbp)
  3a:	0f 88 e0 00 00 00    	js     0x120

Code starting with the faulting instruction
===========================================
   0:	48 8b 5d 10          	mov    0x10(%rbp),%rbx
   4:	45 84 f6             	test   %r14b,%r14b
   7:	74 0d                	je     0x16
   9:	80 bd 9c 00 00 00 00 	cmpb   $0x0,0x9c(%rbp)
  10:	0f 88 e0 00 00 00    	js     0xf6
[   46.729830] RSP: 0018:ffffb2cb8043fd40 EFLAGS: 00010202
[   46.729860] RAX: 0000000000000000 RBX: 00007fffffdff140 RCX: 0000000000000000
[   46.729908] RDX: 0000000000000001 RSI: ffff8ac142687000 RDI: 0000000000000002
[   46.729959] RBP: 00007fffffdff140 R08: ffffffffb968b390 R09: ffffffffba3595e0
[   46.730003] R10: ffffffffba3595e0 R11: 0000000000000000 R12: ffffffffba427160
[   46.730046] R13: dead000000000122 R14: 0000000000000001 R15: 0000000000000000
[   46.730092] FS:  0000000000000000(0000) GS:ffff8ac17ed00000(0000) knlGS:0000000000000000
[   46.730139] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.730177] CR2: 00007fffffdff150 CR3: 0000000002716006 CR4: 0000000000772ef0
[   46.730222] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.730267] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.730310] PKRU: 55555554
[   46.730328] Call Trace:
[   46.730351]  <TASK>
[   46.730371] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) 
[   46.730400] ? page_fault_oops (arch/x86/mm/fault.c:715) 
[   46.730428] ? update_curr (kernel/sched/fair.c:1245) 
[   46.730456] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) 
[   46.730484] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   46.730512] ? __pfx_arp_netdev_event (net/ipv4/arp.c:1320) 
[   46.730546] ? neigh_flush_dev.isra.0 (net/core/neighbour.c:380) 
[   46.730589] __neigh_ifdown.isra.0 (net/core/neighbour.c:425) 
[   46.730620] neigh_carrier_down (net/core/neighbour.c:438) 
[   46.730648] arp_netdev_event (net/ipv4/arp.c:1343) 
[   46.730675] notifier_call_chain (kernel/notifier.c:93) 
[   46.730703] netdev_state_change (net/core/dev.c:1380 net/core/dev.c:1371) 
[   46.730733] linkwatch_do_dev (net/core/link_watch.c:177) 
[   46.730764] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:236) 
[   46.730797] linkwatch_event (net/core/link_watch.c:278) 
[   46.730823] process_one_work (kernel/workqueue.c:3229) 
[   46.730851] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) 
[   46.730877] ? __pfx_worker_thread (kernel/workqueue.c:3337) 
[   46.730908] kthread (kernel/kthread.c:389) 
[   46.730938] ? __pfx_kthread (kernel/kthread.c:342) 
[   46.730967] ret_from_fork (arch/x86/kernel/process.c:147) 
[   46.730995] ? __pfx_kthread (kernel/kthread.c:342) 


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