======================================
| [   26.678214][    C1]  #2: ff11000005d705d8 (&fsvq->lock){+.+.}-{3:3}, at: virtio_fs_requests_done_work (./include/linux/spinlock.h:342 fs/fuse/virtio_fs.c:839)
| [   26.678386][    C1]  #3: ffffffff8a577c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   26.678590][    C1]
| [   26.678590][    C1] stack backtrace:
[   26.678699][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.678700][    C1] Workqueue: events virtio_fs_requests_done_work
[   26.678704][    C1] Call Trace:
[   26.678705][    C1]  <IRQ>
[   26.678707][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   26.678711][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[   26.678714][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   26.678717][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[   26.678719][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   26.678721][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   26.678723][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[   26.678724][    C1]  ? pidfd_getfd (kernel/pid.c:908 kernel/pid.c:927)
[   26.678727][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[   26.678729][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[   26.678730][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   26.678732][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   26.678733][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   26.678735][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   26.678737][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   26.678739][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   26.678741][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   26.678743][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   26.678744][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   26.678746][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   26.678747][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[   26.678749][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   26.678751][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   26.678753][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   26.678755][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   26.678757][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   26.678758][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   26.678760][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   26.678762][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[   26.678764][    C1]  handle_softirqs (kernel/softirq.c:622)
[   26.678765][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   26.678768][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   26.678769][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   26.678771][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   26.678773][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[   26.678774][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   26.678776][    C1]  </IRQ>
[   26.678776][    C1]  <TASK>
[   26.678777][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   26.678779][    C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 12) kernel/locking/spinlock.c:198 (discriminator 12))
[   26.678781][    C1] Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 21 7e ca fd 48 89 df e8 a9 d4 ca fd f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f <bf> 01 00 00 00 e8 30 62 bd fd 65 8b 05 29 0a fe 01 85 c0 74 12 5b
All code
========
   0:	f5                   	cmc
   1:	53                   	push   %rbx
   2:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
   7:	48 89 fb             	mov    %rdi,%rbx
   a:	48 83 c7 18          	add    $0x18,%rdi
   e:	e8 21 7e ca fd       	call   0xfffffffffdca7e34
  13:	48 89 df             	mov    %rbx,%rdi
  16:	e8 a9 d4 ca fd       	call   0xfffffffffdcad4c4
  1b:	f7 c5 00 02 00 00    	test   $0x200,%ebp
  21:	75 1f                	jne    0x42
  23:	9c                   	pushf
  24:	58                   	pop    %rax
  25:	f6 c4 02             	test   $0x2,%ah
  28:	75 2f                	jne    0x59
  2a:*	bf 01 00 00 00       	mov    $0x1,%edi		<-- trapping instruction
  2f:	e8 30 62 bd fd       	call   0xfffffffffdbd6264
  34:	65 8b 05 29 0a fe 01 	mov    %gs:0x1fe0a29(%rip),%eax        # 0x1fe0a64
  3b:	85 c0                	test   %eax,%eax
  3d:	74 12                	je     0x51
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	bf 01 00 00 00       	mov    $0x1,%edi
   5:	e8 30 62 bd fd       	call   0xfffffffffdbd623a
   a:	65 8b 05 29 0a fe 01 	mov    %gs:0x1fe0a29(%rip),%eax        # 0x1fe0a3a
  11:	85 c0                	test   %eax,%eax
  13:	74 12                	je     0x27
  15:	5b                   	pop    %rbx
[   26.678782][    C1] RSP: 0018:ffa0000000467a28 EFLAGS: 00000246
[   26.678785][    C1] RAX: 0000000000000092 RBX: ff1100000a067730 RCX: ffffffff89690613
[   26.678786][    C1] RDX: ff1100000596a340 RSI: ffffffff8a001bcb RDI: ffffffff89a6f6c0
[   26.678787][    C1] RBP: 0000000000000202 R08: 0000000000000000 R09: 0000000000000000
[   26.678788][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: ff1100000103cc40
[   26.678788][    C1] R13: ffffffff88529268 R14: 0000000000000000 R15: 000000000002608f
[   26.678789][    C1]  ? detach_buf_split_in_order (drivers/virtio/virtio_ring.c:850 drivers/virtio/virtio_ring.c:881)
[   26.678794][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   26.678796][    C1]  __delete_object (mm/kmemleak.c:827 (discriminator 3))
[   26.678799][    C1]  kfree (./include/linux/kmemleak.h:50 mm/slub.c:2614 mm/slub.c:6251 mm/slub.c:6566)
[   26.678802][    C1]  detach_buf_split_in_order (drivers/virtio/virtio_ring.c:850 drivers/virtio/virtio_ring.c:881)
[   26.678804][    C1]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[   26.678806][    C1]  virtqueue_get_buf_ctx_split (drivers/virtio/virtio_ring.c:891 drivers/virtio/virtio_ring.c:958)
[   26.678809][    C1]  virtio_fs_requests_done_work (fs/fuse/virtio_fs.c:843 (discriminator 1))
[   26.678811][    C1]  ? virtio_fs_complete_req_work (fs/fuse/virtio_fs.c:823)
[   26.678813][    C1]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   26.678814][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   26.678816][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   26.678818][    C1]  process_one_work (kernel/workqueue.c:3314)
[   26.678820][    C1]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   26.678822][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   26.678825][    C1]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   26.678827][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   26.678828][    C1]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[   26.678830][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   26.678832][    C1]  kthread (kernel/kthread.c:436)
[   26.678833][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   26.678836][    C1]  ? kthread_affine_node (kernel/kthread.c:378)
[   26.678838][    C1]  ret_from_fork (arch/x86/kernel/process.c:158)
[   26.678840][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   26.678842][    C1]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   26.678844][    C1]  ? kthread_affine_node (kernel/kthread.c:378)


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