======================================
| [ 15.017819][ C3] #0: ffff888005d8f1d8 (&fsvq->lock){+.+.}-{3:3}, at: virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1433) 
| [ 15.018189][ C3] #1: ffffffffaa3774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.018553][    C3]
| [   15.018553][    C3] stack backtrace:
[   15.018816][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.018818][    C3] Call Trace:
[   15.018820][    C3]  <IRQ>
[ 15.018821][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.018827][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.018832][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.018836][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.018840][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.018846][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.018850][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.018853][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.018856][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.018860][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.018863][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.018867][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.018871][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.018873][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.018878][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.018881][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.018884][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 15.018888][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.018891][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.018897][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.018901][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.018906][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.018909][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.018912][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.018915][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.018920][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.018923][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.018927][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.018931][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.018934][ C3] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.018937][ C3] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.018940][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.018944][ C3] ? __create_object (mm/kmemleak.c:770) 
[ 15.018948][ C3] ? __kmalloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4326 mm/slub.c:4339) 
[ 15.018952][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.018956][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.018960][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.018962][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.018965][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.018969][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.018973][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 15.018975][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.018978][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.018983][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.018986][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.018991][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.018994][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.018997][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.019000][    C3]  </IRQ>
[   15.019001][    C3]  <TASK>
[ 15.019003][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.019006][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.019010][ C3] Code: 74 24 10 e8 c1 2e 83 fd 48 89 ef e8 79 81 83 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 7e 77 fd 65 8b 05 13 7d 97 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 2e 83             	shrl   $0x83,(%rsi)
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 81 83 fd       	call   0xfffffffffd838189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 7e 77 fd       	call   0xfffffffffd777f29		<-- trapping instruction
  2f:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 7e 77 fd       	call   0xfffffffffd777eff
   5:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   15.019012][    C3] RSP: 0018:ffffc90000747638 EFLAGS: 00000206
[   15.019015][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
[   15.019017][    C3] RDX: 0000000000000000 RSI: ffffffffa9e8f4e4 RDI: 0000000000000001
[   15.019018][    C3] RBP: ffff88800104f440 R08: 0000000000000001 R09: 0000000000000001
[   15.019020][    C3] R10: ffffffffaade68d7 R11: ffff88800104f458 R12: ffff88800104f440
[   15.019022][    C3] R13: ffffea0000285200 R14: ffff88800104de40 R15: ffff88800a149730
[ 15.019028][ C3] get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.019033][ C3] ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.019037][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.019040][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:714) 
[ 15.019043][ C3] ? virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2282 drivers/virtio/virtio_ring.c:2316) 
[ 15.019047][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.019050][ C3] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.019054][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.019057][ C3] kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.019060][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.019062][ C3] ? filp_flush (fs/open.c:1542 (discriminator 3)) 
[ 15.019066][ C3] ? __x64_sys_close (fs/open.c:1589 fs/open.c:1574 fs/open.c:1574) 
[ 15.019071][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.019073][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.019077][ C3] __create_object (mm/kmemleak.c:770) 
[ 15.019081][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.019083][ C3] __kmalloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4326 mm/slub.c:4339) 
[ 15.019088][ C3] virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.019094][ C3] ? __pfx_virtqueue_add_split (drivers/virtio/virtio_ring.c:538) 
[ 15.019099][ C3] virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2282 drivers/virtio/virtio_ring.c:2316) 
[ 15.019104][ C3] virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1440) 
[ 15.019109][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 15.019113][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.019116][ C3] ? __pfx_virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1376) 
[ 15.019121][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.019127][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.019131][ C3] ? fuse_get_unique (fs/fuse/dev.c:317) 
[ 15.019134][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.019138][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.019143][ C3] virtio_fs_send_req (fs/fuse/virtio_fs.c:1499) 
[ 15.019147][ C3] ? fuse_send_one (fs/fuse/dev.c:400) 
[ 15.019151][ C3] __fuse_simple_request (fs/fuse/dev.c:578 fs/fuse/dev.c:672) 
[ 15.019156][ C3] fuse_flush (fs/fuse/file.c:558) 
[ 15.019161][ C3] ? __pfx_fuse_flush (fs/fuse/file.c:517) 
[ 15.019164][ C3] ? ovl_verify_lowerdata (fs/overlayfs/namei.c:1024) 
[ 15.019168][ C3] ? __pfx_ovl_verify_lowerdata (fs/overlayfs/namei.c:1017) 
[ 15.019174][ C3] ? ovl_real_file (fs/overlayfs/file.c:195) 
[ 15.019178][ C3] ? __pfx_ovl_real_file (fs/overlayfs/file.c:175) 
[ 15.019180][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.019184][ C3] ? file_close_fd (fs/file.c:845) 
[ 15.019189][ C3] ovl_flush (fs/overlayfs/file.c:650) 
[ 15.019192][ C3] filp_flush (fs/open.c:1549) 
[ 15.019196][ C3] __x64_sys_close (fs/open.c:1589 fs/open.c:1574 fs/open.c:1574) 
[ 15.019200][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.019203][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.019206][    C3] RIP: 0033:0x7fa82bef8227
[ 15.019210][ C3] Code: ff e8 9d e3 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 e3 c9 f5 ff
All code
========
   0:	ff                   	ljmp   (bad)
   1:	e8 9d e3 01 00       	call   0x1e3a3
   6:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 03 00 00 00       	mov    $0x3,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 41                	ja     0x73
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  3b:	e8 e3 c9 f5 ff       	call   0xfffffffffff5ca23

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 41                	ja     0x49
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  11:	e8 e3 c9 f5 ff       	call   0xfffffffffff5c9f9
[   15.019212][    C3] RSP: 002b:00007ffdd26b21a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   15.019214][    C3] RAX: ffffffffffffffda RBX: 0000000000000102 RCX: 00007fa82bef8227
[   15.019216][    C3] RDX: 00000000000000ff RSI: 00005585e73a7010 RDI: 00000000000000ff
[   15.019218][    C3] RBP: 00007ffdd26b22e0 R08: 00005585e73b8050 R09: 0000000000000000
[   15.019219][    C3] R10: 00007fa82c037008 R11: 0000000000000246 R12: 0000000000000000
[   15.019221][    C3] R13: 00007ffdd26b21e0 R14: 00005585d70d6f27 R15: 00005585e73b6620
| [   15.046781][    C3] RCU nest depth: 0, expected: 0
| [   15.046974][    C3] INFO: lockdep is turned off.
| [   15.047166][    C3] Preemption disabled at:
| [ 15.047168][ C3] 0x0 
[   15.047511][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.047512][    C3] Call Trace:
[   15.047514][    C3]  <IRQ>
[ 15.047515][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.047523][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 15.047530][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.047534][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.047537][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.047541][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.047545][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.047550][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.047553][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.047556][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.047561][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.047564][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.047569][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.047572][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.047578][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.047581][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.047584][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.047588][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.047593][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.047596][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.047600][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.047604][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.047607][ C3] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.047609][ C3] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.047613][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.047616][ C3] ? __create_object (mm/kmemleak.c:770) 
[ 15.047619][ C3] ? __kmalloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4326 mm/slub.c:4339) 
[ 15.047624][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.047627][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.047631][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.047634][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.047637][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.047642][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.047645][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 15.047648][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.047651][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.047655][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.047659][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.047664][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.047667][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.047670][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.047674][    C3]  </IRQ>
[   15.047675][    C3]  <TASK>
[ 15.047676][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.047679][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.047683][ C3] Code: 74 24 10 e8 c1 2e 83 fd 48 89 ef e8 79 81 83 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 7e 77 fd 65 8b 05 13 7d 97 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 2e 83             	shrl   $0x83,(%rsi)
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 81 83 fd       	call   0xfffffffffd838189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 7e 77 fd       	call   0xfffffffffd777f29		<-- trapping instruction
  2f:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 7e 77 fd       	call   0xfffffffffd777eff
   5:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   15.047685][    C3] RSP: 0018:ffffc90000747638 EFLAGS: 00000206
[   15.047688][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
[   15.047689][    C3] RDX: 0000000000000000 RSI: ffffffffa9e8f4e4 RDI: 0000000000000001
[   15.047691][    C3] RBP: ffff88800104f440 R08: 0000000000000001 R09: 0000000000000001
[   15.047693][    C3] R10: ffffffffaade68d7 R11: ffff88800104f458 R12: ffff88800104f440
[   15.047694][    C3] R13: ffffea0000285200 R14: ffff88800104de40 R15: ffff88800a149730
[ 15.047701][ C3] get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.047706][ C3] ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.047709][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.047712][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:714) 
[ 15.047715][ C3] ? virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2282 drivers/virtio/virtio_ring.c:2316) 
[ 15.047719][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.047722][ C3] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.047725][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.047728][ C3] kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.047731][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.047733][ C3] ? filp_flush (fs/open.c:1542 (discriminator 3)) 
[ 15.047737][ C3] ? __x64_sys_close (fs/open.c:1589 fs/open.c:1574 fs/open.c:1574) 
[ 15.047741][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.047744][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.047747][ C3] __create_object (mm/kmemleak.c:770) 
[ 15.047751][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.047754][ C3] __kmalloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4326 mm/slub.c:4339) 
[ 15.047759][ C3] virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 15.047765][ C3] ? __pfx_virtqueue_add_split (drivers/virtio/virtio_ring.c:538) 
[ 15.047771][ C3] virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2282 drivers/virtio/virtio_ring.c:2316) 
[ 15.047775][ C3] virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1440) 
[ 15.047782][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 15.047785][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.047788][ C3] ? __pfx_virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1376) 
[ 15.047793][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.047799][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.047803][ C3] ? fuse_get_unique (fs/fuse/dev.c:317) 
[ 15.047806][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.047810][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.047815][ C3] virtio_fs_send_req (fs/fuse/virtio_fs.c:1499) 
[ 15.047819][ C3] ? fuse_send_one (fs/fuse/dev.c:400) 
[ 15.047823][ C3] __fuse_simple_request (fs/fuse/dev.c:578 fs/fuse/dev.c:672) 
[ 15.047828][ C3] fuse_flush (fs/fuse/file.c:558) 
[ 15.047833][ C3] ? __pfx_fuse_flush (fs/fuse/file.c:517) 
[ 15.047836][ C3] ? ovl_verify_lowerdata (fs/overlayfs/namei.c:1024) 
[ 15.047840][ C3] ? __pfx_ovl_verify_lowerdata (fs/overlayfs/namei.c:1017) 
[ 15.047846][ C3] ? ovl_real_file (fs/overlayfs/file.c:195) 
[ 15.047849][ C3] ? __pfx_ovl_real_file (fs/overlayfs/file.c:175) 
[ 15.047852][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.047855][ C3] ? file_close_fd (fs/file.c:845) 
[ 15.047860][ C3] ovl_flush (fs/overlayfs/file.c:650) 
[ 15.047863][ C3] filp_flush (fs/open.c:1549) 
[ 15.047867][ C3] __x64_sys_close (fs/open.c:1589 fs/open.c:1574 fs/open.c:1574) 
[ 15.047870][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.047874][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.047876][    C3] RIP: 0033:0x7fa82bef8227
[ 15.047878][ C3] Code: ff e8 9d e3 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 e3 c9 f5 ff
All code
========
   0:	ff                   	ljmp   (bad)
   1:	e8 9d e3 01 00       	call   0x1e3a3
   6:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 03 00 00 00       	mov    $0x3,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 41                	ja     0x73
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  3b:	e8 e3 c9 f5 ff       	call   0xfffffffffff5ca23

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 41                	ja     0x49
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  11:	e8 e3 c9 f5 ff       	call   0xfffffffffff5c9f9
[   15.047880][    C3] RSP: 002b:00007ffdd26b21a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   15.047883][    C3] RAX: ffffffffffffffda RBX: 0000000000000102 RCX: 00007fa82bef8227
[   15.047885][    C3] RDX: 00000000000000ff RSI: 00005585e73a7010 RDI: 00000000000000ff
[   15.047886][    C3] RBP: 00007ffdd26b22e0 R08: 00005585e73b8050 R09: 0000000000000000
[   15.047888][    C3] R10: 00007fa82c037008 R11: 0000000000000246 R12: 0000000000000000
[   15.047889][    C3] R13: 00007ffdd26b21e0 R14: 00005585d70d6f27 R15: 00005585e73b6620
| [   16.885628][    C2] INFO: lockdep is turned off.
| [   16.885814][    C2] Preemption disabled at:
| [ 16.885816][ C2] 0x0 
| [   16.886155][    C2] Tainted: [W]=WARN
[   16.886156][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.886158][    C2] Call Trace:
[   16.886160][    C2]  <IRQ>
[ 16.886162][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.886170][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.886178][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.886182][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.886185][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.886189][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.886195][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.886201][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.886203][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.886207][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.886212][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.886215][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.886221][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.886225][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.886231][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.886234][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.886237][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.886242][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.886247][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.886251][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.886254][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.886257][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.886259][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.886263][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.886265][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.886268][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.886271][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.886276][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.886280][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.886284][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.886288][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.886292][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.886295][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.886299][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.886303][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.886309][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.886315][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.886319][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.886325][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.886328][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.886330][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.886334][    C2]  </IRQ>
[   16.886335][    C2]  <TASK>
[ 16.886336][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.886339][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.886343][ C2] Code: a2 b5 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 47 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	a2 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 83 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 fc 54 02 00       	jmp    0x25501
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   16.886346][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   16.886350][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffffa938f5d9
[   16.886352][    C2] RDX: ffffed1006c266fb RSI: ffffffffa9653b60 RDI: ffffffffa6b8d18f
[   16.886353][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c266fa
[   16.886355][    C2] R10: ffff8880361337d3 R11: ffffffffacc90298 R12: 0000000000000000
[   16.886357][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 16.886361][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.886364][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.886368][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.886370][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.886373][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.886376][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.886380][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 16.886384][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.886388][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.886391][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.886394][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit