======================================
| [  318.849877][    C1]  #0: ffffffffb7377d20 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:838 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) arch/x86/kernel/unwind_orc.c:495 (discriminator 2))
| [  318.850058][    C1]  #1: ffffffffb7377c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  318.850240][    C1]
| [  318.850240][    C1] stack backtrace:
[  318.850367][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  318.850369][    C1] Call Trace:
[  318.850370][    C1]  <IRQ>
[  318.850372][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  318.850377][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[  318.850380][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[  318.850383][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[  318.850385][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  318.850387][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  318.850389][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[  318.850390][    C1]  ? fuse_dax_inode_init (fs/fuse/dax.c:1323)
[  318.850395][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[  318.850396][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[  318.850398][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[  318.850399][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850401][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  318.850404][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  318.850405][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  318.850407][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850409][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  318.850411][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[  318.850412][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  318.850414][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  318.850415][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[  318.850417][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  318.850419][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  318.850421][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850423][    C1]  ? sched_balance_softirq (kernel/sched/fair.c:13350)
[  318.850425][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  318.850427][    C1]  ? sched_balance_domains (kernel/sched/fair.c:12634)
[  318.850429][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850431][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  318.850432][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  318.850434][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[  318.850436][    C1]  handle_softirqs (kernel/softirq.c:622)
[  318.850437][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  318.850440][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  318.850442][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  318.850444][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  318.850445][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[  318.850447][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  318.850449][    C1]  </IRQ>
[  318.850449][    C1]  <TASK>
[  318.850450][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  318.850452][    C1] RIP: 0010:lock_acquire.part.0 (./arch/x86/include/asm/irqflags.h:158 (discriminator 1) kernel/locking/lockdep.c:5871 (discriminator 1))
[  318.850454][    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
[  318.850456][    C1] RSP: 0018:ffa0000000707580 EFLAGS: 00000206
[  318.850458][    C1] RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0ac0d5affe09d4ff
[  318.850460][    C1] RDX: 0000000000000001 RSI: ffffffffb6debde8 RDI: ffffffffb686f6c0
[  318.850461][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ff1100001747ae30
[  318.850461][    C1] R10: 0000000000000200 R11: 0000000000000001 R12: ffffffffb7377d20
[  318.850462][    C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
[  318.850464][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850466][    C1]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  318.850467][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  318.850469][    C1]  unwind_next_frame (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:838 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) arch/x86/kernel/unwind_orc.c:495 (discriminator 2))
[  318.850470][    C1]  ? unwind_next_frame (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:838 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) arch/x86/kernel/unwind_orc.c:495 (discriminator 2))
[  318.850472][    C1]  ? arch_stack_walk (./arch/x86/include/asm/unwind.h:64 arch/x86/kernel/stacktrace.c:24)
[  318.850476][    C1]  ? stack_access_ok (./arch/x86/include/asm/stacktrace.h:55)
[  318.850477][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  318.850478][    C1]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  318.850479][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  318.850481][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  318.850482][    C1]  ? get_stack_info_noinstr (arch/x86/kernel/dumpstack_64.c:173)
[  318.850484][    C1]  __unwind_start (arch/x86/kernel/unwind_orc.c:787)
[  318.850486][    C1]  ? write_profile (profile.c:?)
[  318.850488][    C1]  arch_stack_walk (./arch/x86/include/asm/unwind.h:64 arch/x86/kernel/stacktrace.c:24)
[  318.850490][    C1]  ? arch_stack_walk (./arch/x86/include/asm/unwind.h:64 arch/x86/kernel/stacktrace.c:24)
[  318.850492][    C1]  ? copy_args_to_argbuf (fs/fuse/virtio_fs.c:704)
[  318.850494][    C1]  stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[  318.850496][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[  318.850498][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  318.850499][    C1]  ? check_object (mm/slub.c:1407 (discriminator 1) mm/slub.c:1514 (discriminator 1))
[  318.850503][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  318.850505][    C1]  set_track_prepare (mm/slub.c:1037)
[  318.850508][    C1]  ___slab_alloc (mm/slub.c:1067 mm/slub.c:4480)
[  318.850510][    C1]  ? copy_args_to_argbuf (./include/linux/slab.h:954 fs/fuse/virtio_fs.c:709)
[  318.850512][    C1]  ? copy_args_to_argbuf (./include/linux/slab.h:954 fs/fuse/virtio_fs.c:709)
[  318.850514][    C1]  ? copy_args_to_argbuf (./include/linux/slab.h:954 fs/fuse/virtio_fs.c:709)
[  318.850515][    C1]  __kmalloc_noprof (mm/slub.c:4511 mm/slub.c:4887 mm/slub.c:5295 mm/slub.c:5308)
[  318.850518][    C1]  copy_args_to_argbuf (./include/linux/slab.h:954 fs/fuse/virtio_fs.c:709)
[  318.850519][    C1]  ? write_profile (profile.c:?)
[  318.850522][    C1]  virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1423)
[  318.850524][    C1]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  318.850526][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  318.850527][    C1]  ? virtio_fs_probe (./include/linux/virtio_config.h:371)
[  318.850529][    C1]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[  318.850533][    C1]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[  318.850535][    C1]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[  318.850537][    C1]  virtio_fs_send_req (fs/fuse/virtio_fs.c:1517)
[  318.850539][    C1]  ? fuse_request_alloc (./include/linux/instrumented.h:41 ./include/asm-generic/bitops/instrumented-non-atomic.h:28 fs/fuse/dev.c:135 fs/fuse/dev.c:144)
[  318.850542][    C1]  __fuse_simple_request (fs/fuse/dev.c:602 fs/fuse/dev.c:699)
[  318.850544][    C1]  fuse_flush (fs/fuse/fuse_i.h:1262 fs/fuse/file.c:500)
[  318.850547][    C1]  ? fuse_release (fs/fuse/file.c:389)
[  318.850548][    C1]  ? ovl_verify_lowerdata (fs/overlayfs/namei.c:1051)
[  318.850550][    C1]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[  318.850552][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  318.850554][    C1]  ? ovl_path_next (fs/overlayfs/ovl_entry.h:120)
[  318.850557][    C1]  ? ovl_real_file (fs/overlayfs/file.c:195)
[  318.850559][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  318.850561][    C1]  ? ovl_fsync (fs/overlayfs/file.c:464 (discriminator 1))
[  318.850563][    C1]  ovl_flush (fs/overlayfs/file.c:629)
[  318.850565][    C1]  filp_flush (fs/open.c:1467)
[  318.850568][    C1]  __x64_sys_close (fs/open.c:1501 (discriminator 1) fs/open.c:1492 (discriminator 1) fs/open.c:1492 (discriminator 1))
[  318.850570][    C1]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  318.850572][    C1]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[  318.850575][    C1]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[  318.850577][    C1]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  318.850578][    C1] RIP: 0033:0x7f0a1d27d4cb
[  318.850581][    C1] Code: 0f 1e fa 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 0a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 f7 d8 89 05 c0 4d 01 00 b8
All code
========
   0:	0f 1e fa             	nop    %edx
   3:	48 89 f2             	mov    %rsi,%rdx
   6:	31 c9                	xor    %ecx,%ecx
   8:	48 89 fe             	mov    %rdi,%rsi
   b:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  10:	e9 0a ff ff ff       	jmp    0xffffffffffffff1f
  15:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1c:	00 00 00 
  1f:	f3 0f 1e fa          	endbr64
  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 05                	ja     0x37
  32:	c3                   	ret
  33:	0f 1f 40 00          	nopl   0x0(%rax)
  37:	f7 d8                	neg    %eax
  39:	89 05 c0 4d 01 00    	mov    %eax,0x14dc0(%rip)        # 0x14dff
  3f:	b8                   	.byte 0xb8

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 05                	ja     0xd
   8:	c3                   	ret
   9:	0f 1f 40 00          	nopl   0x0(%rax)
   d:	f7 d8                	neg    %eax
   f:	89 05 c0 4d 01 00    	mov    %eax,0x14dc0(%rip)        # 0x14dd5
  15:	b8                   	.byte 0xb8
[  318.850582][    C1] RSP: 002b:00007ffd263572b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  318.850583][    C1] RAX: ffffffffffffffda RBX: 00007f0a1d185530 RCX: 00007f0a1d27d4cb
[  318.850584][    C1] RDX: 0000000000000001 RSI: 00007f0a1d175160 RDI: 0000000000000005
[  318.850585][    C1] RBP: 00007ffd26357420 R08: 00007f0a1d175138 R09: 000000000000000f
[  318.850585][    C1] R10: 00000000c0000002 R11: 0000000000000246 R12: 0000000000000003


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