======================================
| [  102.592362][    C1]  #1: ffa000000036fd10 ((work_completion)(&fsvq->done_work)){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3290 (discriminator 2))
| [  102.592550][    C1]  #2: ffffffffac977c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  102.592749][    C1]
| [  102.592749][    C1] stack backtrace:
[  102.592859][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  102.592860][    C1] Workqueue: events virtio_fs_requests_done_work
[  102.592866][    C1] Call Trace:
[  102.592867][    C1]  <IRQ>
[  102.592869][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  102.592874][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[  102.592877][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[  102.592880][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[  102.592882][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  102.592884][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  102.592886][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[  102.592889][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[  102.592891][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[  102.592892][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[  102.592893][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  102.592895][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  102.592897][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  102.592899][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  102.592901][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  102.592903][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  102.592904][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[  102.592906][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  102.592908][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  102.592910][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[  102.592911][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  102.592913][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  102.592915][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  102.592916][    C1]  ? sched_balance_softirq (kernel/sched/fair.c:13350)
[  102.592920][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  102.592921][    C1]  ? sched_balance_domains (kernel/sched/fair.c:12634)
[  102.592923][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  102.592925][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  102.592926][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  102.592928][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[  102.592930][    C1]  handle_softirqs (kernel/softirq.c:622)
[  102.592932][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  102.592935][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  102.592936][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  102.592938][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  102.592940][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[  102.592941][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  102.592943][    C1]  </IRQ>
[  102.592944][    C1]  <TASK>
[  102.592944][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  102.592946][    C1] RIP: 0010:memset (arch/x86/lib/memset_64.S:37)
[  102.592949][    C1] Code: 44 89 54 17 fe eb 0c 48 83 fa 01 72 06 44 8a 1e 44 88 1f c3 0f 1f 80 00 00 00 00 f3 0f 1e fa 66 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 66 66 2e 0f 1f 84 00 00 00 00 00 49 89 fa 40 0f
All code
========
   0:	44 89 54 17 fe       	mov    %r10d,-0x2(%rdi,%rdx,1)
   5:	eb 0c                	jmp    0x13
   7:	48 83 fa 01          	cmp    $0x1,%rdx
   b:	72 06                	jb     0x13
   d:	44 8a 1e             	mov    (%rsi),%r11b
  10:	44 88 1f             	mov    %r11b,(%rdi)
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	49 89 f9             	mov    %rdi,%r9
  24:	40 88 f0             	mov    %sil,%al
  27:	48 89 d1             	mov    %rdx,%rcx
  2a:*	f3 aa                	rep stos %al,(%rdi)		<-- trapping instruction
  2c:	4c 89 c8             	mov    %r9,%rax
  2f:	c3                   	ret
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	49 89 fa             	mov    %rdi,%r10
  3e:	40                   	rex
  3f:	0f                   	.byte 0xf

Code starting with the faulting instruction
===========================================
   0:	f3 aa                	rep stos %al,(%rdi)
   2:	4c 89 c8             	mov    %r9,%rax
   5:	c3                   	ret
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	49 89 fa             	mov    %rdi,%r10
  14:	40                   	rex
  15:	0f                   	.byte 0xf
[  102.592951][    C1] RSP: 0018:ffa000000036fae8 EFLAGS: 00000286
[  102.592953][    C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 00000000000003ff
[  102.592954][    C1] RDX: 0000000000000ff6 RSI: 0000000000000000 RDI: ff1100000bf57c00
[  102.592955][    C1] RBP: 0000000000000009 R08: ffffffffaa2e1198 R09: ff1100000bf57009
[  102.592956][    C1] R10: ffe21c00017eb000 R11: 0000000000000000 R12: ffd40000002fd5c0
[  102.592957][    C1] R13: ffd40000002fd5c0 R14: ffd40000002fd5c0 R15: 0000000000000000
[  102.592959][    C1]  ? virtio_fs_request_complete (./include/linux/highmem.h:377 ./include/linux/highmem.h:755 fs/fuse/virtio_fs.c:802)
[  102.592961][    C1]  virtio_fs_request_complete (./include/linux/highmem.h:377 ./include/linux/highmem.h:755 fs/fuse/virtio_fs.c:802)
[  102.592964][    C1]  virtio_fs_requests_done_work (fs/fuse/virtio_fs.c:869)
[  102.592967][    C1]  ? virtio_fs_complete_req_work (fs/fuse/virtio_fs.c:823)
[  102.592968][    C1]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[  102.592970][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  102.592972][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  102.592974][    C1]  process_one_work (kernel/workqueue.c:3314)
[  102.592976][    C1]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[  102.592978][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  102.592981][    C1]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  102.592983][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[  102.592985][    C1]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[  102.592987][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[  102.592989][    C1]  kthread (kernel/kthread.c:436)
[  102.592990][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  102.592994][    C1]  ? kthread_affine_node (kernel/kthread.c:378)
[  102.592995][    C1]  ret_from_fork (arch/x86/kernel/process.c:158)
[  102.592998][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  102.593000][    C1]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[  102.593003][    C1]  ? kthread_affine_node (kernel/kthread.c:378)


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