======================================
| [  785.451999][    C1]  #2: ff11000005da85d8 (&fsvq->lock){+.+.}-{3:3}, at: virtio_fs_requests_done_work (./include/linux/spinlock.h:342 fs/fuse/virtio_fs.c:839)
| [  785.452165][    C1]  #3: ffffffffbc177c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  785.452309][    C1]
| [  785.452309][    C1] stack backtrace:
[  785.452415][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  785.452417][    C1] Workqueue: events virtio_fs_requests_done_work
[  785.452420][    C1] Call Trace:
[  785.452422][    C1]  <IRQ>
[  785.452423][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  785.452428][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[  785.452431][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[  785.452434][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[  785.452436][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  785.452438][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  785.452440][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[  785.452442][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[  785.452444][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[  785.452445][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[  785.452447][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  785.452448][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  785.452450][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  785.452452][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  785.452454][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  785.452456][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  785.452457][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[  785.452459][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  785.452460][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  785.452462][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[  785.452463][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  785.452465][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  785.452467][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  785.452469][    C1]  ? sched_balance_softirq (kernel/sched/fair.c:13350)
[  785.452471][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  785.452473][    C1]  ? sched_balance_domains (kernel/sched/fair.c:12634)
[  785.452475][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  785.452476][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  785.452477][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  785.452479][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[  785.452481][    C1]  handle_softirqs (kernel/softirq.c:622)
[  785.452483][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  785.452485][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  785.452487][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  785.452489][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  785.452490][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[  785.452491][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  785.452493][    C1]  </IRQ>
[  785.452494][    C1]  <TASK>
[  785.452494][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  785.452496][    C1] RIP: 0010:lock_acquire.part.0 (./arch/x86/include/asm/irqflags.h:158 (discriminator 1) kernel/locking/lockdep.c:5871 (discriminator 1))
[  785.452498][    C1] Code: ff 65 0f c1 05 37 d9 33 04 83 f8 01 4c 8b 14 24 0f 85 30 01 00 00 9c 58 f6 c4 02 0f 85 4d 01 00 00 4d 85 d2 0f 85 16 01 00 00 <48> 8b 44 24 30 65 48 2b 05 a9 92 33 04 0f 85 43 01 00 00 48 83 c4
All code
========
   0:	ff 65 0f             	jmp    *0xf(%rbp)
   3:	c1 05 37 d9 33 04 83 	roll   $0x83,0x433d937(%rip)        # 0x433d941
   a:	f8                   	clc
   b:	01 4c 8b 14          	add    %ecx,0x14(%rbx,%rcx,4)
   f:	24 0f                	and    $0xf,%al
  11:	85 30                	test   %esi,(%rax)
  13:	01 00                	add    %eax,(%rax)
  15:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1c:	85 4d 01             	test   %ecx,0x1(%rbp)
  1f:	00 00                	add    %al,(%rax)
  21:	4d 85 d2             	test   %r10,%r10
  24:	0f 85 16 01 00 00    	jne    0x140
  2a:*	48 8b 44 24 30       	mov    0x30(%rsp),%rax		<-- trapping instruction
  2f:	65 48 2b 05 a9 92 33 	sub    %gs:0x43392a9(%rip),%rax        # 0x43392e0
  36:	04 
  37:	0f 85 43 01 00 00    	jne    0x180
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c4                   	.byte 0xc4

Code starting with the faulting instruction
===========================================
   0:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
   5:	65 48 2b 05 a9 92 33 	sub    %gs:0x43392a9(%rip),%rax        # 0x43392b6
   c:	04 
   d:	0f 85 43 01 00 00    	jne    0x156
  13:	48                   	rex.W
  14:	83                   	.byte 0x83
  15:	c4                   	.byte 0xc4
[  785.452500][    C1] RSP: 0018:ffa0000000a67af8 EFLAGS: 00000206
[  785.452502][    C1] RAX: 0000000000000046 RBX: 0000000000000000 RCX: 877584498755db5b
[  785.452503][    C1] RDX: 0000000000000001 RSI: ffffffffbbbebde8 RDI: ffffffffbb66f6c0
[  785.452504][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ff1100000bfa5180
[  785.452505][    C1] R10: 0000000000000200 R11: 0000000000000001 R12: ff11000005da85d8
[  785.452505][    C1] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
[  785.452508][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  785.452509][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  785.452511][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[  785.452513][    C1]  ? virtio_fs_requests_done_work (./include/linux/spinlock.h:342 fs/fuse/virtio_fs.c:839)
[  785.452514][    C1]  virtio_fs_requests_done_work (./include/linux/spinlock.h:342 fs/fuse/virtio_fs.c:839)
[  785.452517][    C1]  ? virtio_fs_complete_req_work (fs/fuse/virtio_fs.c:823)
[  785.452518][    C1]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[  785.452520][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  785.452521][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  785.452523][    C1]  process_one_work (kernel/workqueue.c:3314)
[  785.452526][    C1]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[  785.452527][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  785.452530][    C1]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  785.452532][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[  785.452533][    C1]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[  785.452536][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[  785.452537][    C1]  kthread (kernel/kthread.c:436)
[  785.452539][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  785.452542][    C1]  ? kthread_affine_node (kernel/kthread.c:378)
[  785.452544][    C1]  ret_from_fork (arch/x86/kernel/process.c:158)
[  785.452546][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  785.452548][    C1]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[  785.452551][    C1]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock