======================================
| WAIT TIMEOUT stdout
| [  172.596671][   T66] fbnic 0000:01:00.0 enp1s0: Link is Down
| [  173.398119][   T83] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000045: 0000 [#1] SMP KASAN
| [  173.398512][   T83] KASAN: null-ptr-deref in range [0x0000000000000228-0x000000000000022f]
[  173.399061][   T83] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  173.399408][   T83] Workqueue: events fbnic_service_task
[  173.399579][   T83] RIP: 0010:fbnic_napi_depletion_check (drivers/net/ethernet/meta/fbnic/fbnic_txrx.c:2773)
[  173.399795][   T83] Code: 00 48 89 d1 48 c1 e9 03 42 80 3c 21 00 0f 85 3c 06 00 00 48 8b 1a 48 8d bb 2a 02 00 00 48 89 f9 48 89 fe 48 c1 e9 03 83 e6 07 <42> 0f b6 0c 21 40 38 f1 7f 08 84 c9 0f 85 e1 05 00 00 48 8d bb 2b
All code
========
   0:	00 48 89             	add    %cl,-0x77(%rax)
   3:	d1 48 c1             	rorl   $1,-0x3f(%rax)
   6:	e9 03 42 80 3c       	jmp    0x3c80420e
   b:	21 00                	and    %eax,(%rax)
   d:	0f 85 3c 06 00 00    	jne    0x64f
  13:	48 8b 1a             	mov    (%rdx),%rbx
  16:	48 8d bb 2a 02 00 00 	lea    0x22a(%rbx),%rdi
  1d:	48 89 f9             	mov    %rdi,%rcx
  20:	48 89 fe             	mov    %rdi,%rsi
  23:	48 c1 e9 03          	shr    $0x3,%rcx
  27:	83 e6 07             	and    $0x7,%esi
  2a:*	42 0f b6 0c 21       	movzbl (%rcx,%r12,1),%ecx		<-- trapping instruction
  2f:	40 38 f1             	cmp    %sil,%cl
  32:	7f 08                	jg     0x3c
  34:	84 c9                	test   %cl,%cl
  36:	0f 85 e1 05 00 00    	jne    0x61d
  3c:	48                   	rex.W
  3d:	8d                   	.byte 0x8d
  3e:	bb                   	.byte 0xbb
  3f:	2b                   	.byte 0x2b

Code starting with the faulting instruction
===========================================
   0:	42 0f b6 0c 21       	movzbl (%rcx,%r12,1),%ecx
   5:	40 38 f1             	cmp    %sil,%cl
   8:	7f 08                	jg     0x12
   a:	84 c9                	test   %cl,%cl
   c:	0f 85 e1 05 00 00    	jne    0x5f3
  12:	48                   	rex.W
  13:	8d                   	.byte 0x8d
  14:	bb                   	.byte 0xbb
  15:	2b                   	.byte 0x2b
[  173.400359][   T83] RSP: 0018:ffffc900005bfb58 EFLAGS: 00010202
[  173.400552][   T83] RAX: ffffc900005bfbc0 RBX: 0000000000000000 RCX: 0000000000000045
[  173.400789][   T83] RDX: ffff888008199908 RSI: 0000000000000002 RDI: 000000000000022a
[  173.401034][   T83] RBP: ffff8880081980a0 R08: 0000000000000000 R09: fffffbfff58502ea
[  173.401263][   T83] R10: 0000000000000003 R11: ffff888008198c98 R12: dffffc0000000000
[  173.401481][   T83] R13: ffff888008198c30 R14: 0000000000000003 R15: 0000000000000000
[  173.401712][   T83] FS:  0000000000000000(0000) GS:ffff8880c0136000(0000) knlGS:0000000000000000
[  173.402019][   T83] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  173.402205][   T83] CR2: 00007f451fbe9050 CR3: 0000000054d35003 CR4: 0000000000772ef0
[  173.402452][   T83] PKRU: 55555554
[  173.402609][   T83] Call Trace:
[  173.402719][   T83]  <TASK>
[  173.402818][   T83]  ? fbnic_write_rules (drivers/net/ethernet/meta/fbnic/fbnic_rpc.c:1210 drivers/net/ethernet/meta/fbnic/fbnic_rpc.c:1238)
[  173.403009][   T83]  ? fbnic_napi_enable (drivers/net/ethernet/meta/fbnic/fbnic_txrx.c:2763)
[  173.403174][   T83]  fbnic_service_task (./include/linux/netdevice.h:2773 drivers/net/ethernet/meta/fbnic/fbnic_pci.c:231)
[  173.403332][   T83]  process_one_work (kernel/workqueue.c:3268)
[  173.403502][   T83]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3165)
[  173.403687][   T83]  ? assign_work (kernel/workqueue.c:1206)
[  173.403854][   T83]  worker_thread (kernel/workqueue.c:3340 kernel/workqueue.c:3427)
[  173.404026][   T83]  ? rescuer_thread (kernel/workqueue.c:3373)
[  173.404198][   T83]  kthread (kernel/kthread.c:463)
[  173.404322][   T83]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  173.404476][   T83]  ? ret_from_fork (arch/x86/kernel/process.c:157)
[  173.404661][   T83]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  173.404825][   T83]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  173.405014][   T83]  ? kthread_is_per_cpu (kernel/kthread.c:412)
[  173.405181][   T83]  ret_from_fork (arch/x86/kernel/process.c:164)
[  173.405334][   T83]  ? kthread_is_per_cpu (kernel/kthread.c:412)


Finger prints:
fbnic_napi_depletion_check:fbnic_service_task:process_one_work:worker_thread:kthread