======================================
| [   84.642156][    C1]  #2: ff11000005d305d8 (&fsvq->lock){+.+.}-{3:3}, at: virtio_fs_requests_done_work (./include/linux/spinlock.h:342 fs/fuse/virtio_fs.c:839)
| [   84.642341][    C1]  #3: ffffffffb3577c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   84.642501][    C1]
| [   84.642501][    C1] stack backtrace:
[   84.642615][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   84.642617][    C1] Workqueue: events virtio_fs_requests_done_work
[   84.642621][    C1] Call Trace:
[   84.642622][    C1]  <IRQ>
[   84.642624][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   84.642628][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[   84.642631][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   84.642635][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[   84.642636][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   84.642639][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   84.642641][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[   84.642642][    C1]  ? virtqueue_enable_cb_prepare_packed (drivers/virtio/virtio_ring.c:2239)
[   84.642646][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[   84.642648][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[   84.642649][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   84.642651][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   84.642652][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   84.642655][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   84.642657][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   84.642658][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   84.642660][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   84.642662][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   84.642664][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   84.642666][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   84.642667][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[   84.642669][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   84.642671][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   84.642673][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   84.642676][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   84.642677][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   84.642679][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   84.642681][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[   84.642683][    C1]  handle_softirqs (kernel/softirq.c:622)
[   84.642684][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   84.642687][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   84.642689][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   84.642691][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   84.642692][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[   84.642694][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   84.642695][    C1]  </IRQ>
[   84.642696][    C1]  <TASK>
[   84.642697][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   84.642698][    C1] RIP: 0010:__unwind_start (arch/x86/kernel/unwind_orc.c:787)
[   84.642702][    C1] Code: 4c 24 08 85 d2 0f 84 8f 00 00 00 48 bd 00 00 00 00 00 fc ff df 48 c1 e8 03 48 c1 e9 03 4c 8d 2c 28 4c 8d 24 29 eb 26 4c 89 ff <e8> 2e dd ff ff 4c 89 f8 48 c1 e8 03 0f b6 04 28 84 c0 74 08 3c 03
All code
========
   0:	4c 24 08             	rex.WR and $0x8,%al
   3:	85 d2                	test   %edx,%edx
   5:	0f 84 8f 00 00 00    	je     0x9a
   b:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  12:	fc ff df 
  15:	48 c1 e8 03          	shr    $0x3,%rax
  19:	48 c1 e9 03          	shr    $0x3,%rcx
  1d:	4c 8d 2c 28          	lea    (%rax,%rbp,1),%r13
  21:	4c 8d 24 29          	lea    (%rcx,%rbp,1),%r12
  25:	eb 26                	jmp    0x4d
  27:	4c 89 ff             	mov    %r15,%rdi
  2a:*	e8 2e dd ff ff       	call   0xffffffffffffdd5d		<-- trapping instruction
  2f:	4c 89 f8             	mov    %r15,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
  3a:	84 c0                	test   %al,%al
  3c:	74 08                	je     0x46
  3e:	3c 03                	cmp    $0x3,%al

Code starting with the faulting instruction
===========================================
   0:	e8 2e dd ff ff       	call   0xffffffffffffdd33
   5:	4c 89 f8             	mov    %r15,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
  10:	84 c0                	test   %al,%al
  12:	74 08                	je     0x1c
  14:	3c 03                	cmp    $0x3,%al
[   84.642704][    C1] RSP: 0018:ffa000000037f658 EFLAGS: 00000216
[   84.642706][    C1] RAX: 1ff400000006fede RBX: ffa000000037f740 RCX: ffa000000037f748
[   84.642707][    C1] RDX: ffa0000000380000 RSI: ff110000024ac640 RDI: ffa000000037f6a8
[   84.642708][    C1] RBP: dffffc0000000000 R08: ffa000000037f6d0 R09: ffa000000037f6a8
[   84.642708][    C1] R10: fff3fc000006fee3 R11: fff3fc000006fee3 R12: fff3fc000006fed7
[   84.642709][    C1] R13: fff3fc000006fed6 R14: ffa000000037f6f0 R15: ffa000000037f6a8
[   84.642711][    C1]  ? __unwind_start (arch/x86/kernel/unwind_orc.c:756)
[   84.642713][    C1]  ? __unwind_start (arch/x86/kernel/unwind_orc.c:787)
[   84.642714][    C1]  ? write_profile (profile.c:?)
[   84.642716][    C1]  arch_stack_walk (./arch/x86/include/asm/unwind.h:64 arch/x86/kernel/stacktrace.c:24)
[   84.642720][    C1]  ? __unwind_start (arch/x86/kernel/unwind_orc.c:741)
[   84.642722][    C1]  ? detach_buf_split_in_order (drivers/virtio/virtio_ring.c:850 drivers/virtio/virtio_ring.c:881)
[   84.642724][    C1]  stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   84.642726][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   84.642728][    C1]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[   84.642730][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[   84.642732][    C1]  ? sched_ttwu_pending (kernel/sched/core.c:3807 (discriminator 7))
[   84.642735][    C1]  kasan_save_stack (mm/kasan/common.c:57)
[   84.642743][    C1]  kasan_record_aux_stack (mm/kasan/generic.c:556)
[   84.642745][    C1]  ? __remove_object (mm/kmemleak.c:609)
[   84.642747][    C1]  __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[   84.642748][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   84.642750][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   84.642752][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   84.642753][    C1]  kfree (./include/linux/kmemleak.h:50 mm/slub.c:2614 mm/slub.c:6251 mm/slub.c:6566)
[   84.642757][    C1]  detach_buf_split_in_order (drivers/virtio/virtio_ring.c:850 drivers/virtio/virtio_ring.c:881)
[   84.642759][    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)
[   84.642761][    C1]  virtqueue_get_buf_ctx_split (drivers/virtio/virtio_ring.c:891 drivers/virtio/virtio_ring.c:958)
[   84.642764][    C1]  virtio_fs_requests_done_work (fs/fuse/virtio_fs.c:843 (discriminator 1))
[   84.642766][    C1]  ? virtio_fs_complete_req_work (fs/fuse/virtio_fs.c:823)
[   84.642768][    C1]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   84.642770][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   84.642771][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   84.642773][    C1]  process_one_work (kernel/workqueue.c:3314)
[   84.642776][    C1]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   84.642777][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   84.642780][    C1]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   84.642782][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   84.642784][    C1]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[   84.642786][    C1]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   84.642788][    C1]  kthread (kernel/kthread.c:436)
[   84.642790][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   84.642793][    C1]  ? kthread_affine_node (kernel/kthread.c:378)
[   84.642795][    C1]  ret_from_fork (arch/x86/kernel/process.c:158)
[   84.642797][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   84.642799][    C1]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   84.642801][    C1]  ? kthread_affine_node (kernel/kthread.c:378)


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