======================================
| [ 45.418340][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   45.418547][    C1]
| [   45.418631][    C1]
| [   45.418631][    C1] stack backtrace:
[   45.419102][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   45.419485][    C1] Call Trace:
[   45.419646][    C1]  <IRQ>
[ 45.419743][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 45.420026][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 45.420236][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 45.420459][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 45.420624][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 45.420889][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 45.421058][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 45.421225][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 45.421403][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 45.421679][ C1] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 45.421843][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 45.422018][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 45.422143][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 45.422267][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 45.422445][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 45.422620][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.422915][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 45.423086][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.423326][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 45.423495][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 45.423679][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.424030][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 45.424210][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.424461][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 45.424628][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.424983][ C1] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.425240][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.425535][ C1] call_timer_fn (kernel/time/timer.c:1793) 
[ 45.425809][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 45.425983][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 45.426163][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 45.426354][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 45.426483][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 45.426756][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.427054][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 45.427222][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 45.427394][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.427682][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 45.427854][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 45.428027][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 45.428199][ C1] __do_softirq (kernel/softirq.c:554) 
[ 45.428380][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 45.428508][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   45.428686][    C1]  </IRQ>
[   45.428778][    C1]  <TASK>
[ 45.428862][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 45.429070][ C1] RIP: 0010:orc_find.part.0 (arch/x86/kernel/unwind_orc.c:198) 
[ 45.429252][ C1] Code: 84 00 eb c0 48 89 ef e8 83 1f 84 00 eb da 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 56 41 55 41 54 <49> 89 fc 55 53 48 bb 00 00 00 00 00 fc ff df 48 83 ec 10 49 81 fc
All code
========
   0:	84 00                	test   %al,(%rax)
   2:	eb c0                	jmp    0xffffffffffffffc4
   4:	48 89 ef             	mov    %rbp,%rdi
   7:	e8 83 1f 84 00       	call   0x841f8f
   c:	eb da                	jmp    0xffffffffffffffe8
   e:	90                   	nop
   f:	90                   	nop
  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:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  24:	41 56                	push   %r14
  26:	41 55                	push   %r13
  28:	41 54                	push   %r12
  2a:*	49 89 fc             	mov    %rdi,%r12		<-- trapping instruction
  2d:	55                   	push   %rbp
  2e:	53                   	push   %rbx
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df 
  39:	48 83 ec 10          	sub    $0x10,%rsp
  3d:	49                   	rex.WB
  3e:	81                   	.byte 0x81
  3f:	fc                   	cld

Code starting with the faulting instruction
===========================================
   0:	49 89 fc             	mov    %rdi,%r12
   3:	55                   	push   %rbp
   4:	53                   	push   %rbx
   5:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
   c:	fc ff df 
   f:	48 83 ec 10          	sub    $0x10,%rsp
  13:	49                   	rex.WB
  14:	81                   	.byte 0x81
  15:	fc                   	cld
[   45.429979][    C1] RSP: 0018:ffffc9000068f790 EFLAGS: 00000282
[   45.430186][    C1] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90000690001
[   45.430435][    C1] RDX: 1ffff920000d1f21 RSI: ffffffffb8600126 RDI: ffffffffb8600125
[   45.430889][    C1] RBP: ffffc9000068f908 R08: ffffc9000068f8f0 R09: 1ffff920000d1eff
[   45.431136][    C1] R10: ffffc9000068f8b0 R11: ffffc9000068f8f1 R12: 1ffff920000d1eff
[   45.431395][    C1] R13: ffffc9000068f8b0 R14: 0000000000000000 R15: 0000000000000000
[ 45.431762][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.431967][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) 
[ 45.432176][ C1] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 45.432351][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.432557][ C1] ? is_bpf_text_address (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 kernel/bpf/core.c:769) 
[ 45.432734][ C1] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 45.432907][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.433115][ C1] ? kernel_text_address (kernel/extable.c:99) 
[ 45.433295][ C1] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 45.433502][ C1] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 45.433679][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.433991][ C1] stack_trace_save (kernel/stacktrace.c:123) 
[ 45.434161][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 45.434333][ C1] kasan_save_stack (mm/kasan/common.c:48) 
[ 45.434498][ C1] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 45.434761][ C1] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 45.434930][ C1] ? kasan_save_free_info (mm/kasan/generic.c:582) 
[ 45.435114][ C1] ? __kasan_slab_free (mm/kasan/common.c:274) 
[ 45.435286][ C1] ? kfree (mm/slub.c:4280 mm/slub.c:4390) 
[ 45.435422][ C1] ? p9_client_clunk (net/9p/client.c:1459) 
[ 45.435712][ C1] ? v9fs_dir_release (./include/net/9p/client.h:278 fs/9p/vfs_dir.c:224) 
[ 45.435887][ C1] ? __fput (fs/file_table.c:422) 
[ 45.436020][ C1] ? task_work_run (kernel/task_work.c:180 (discriminator 1)) 
[ 45.436194][ C1] ? do_exit (kernel/exit.c:879) 
[ 45.436319][ C1] ? do_group_exit (kernel/exit.c:1008) 
[ 45.436492][ C1] ? __x64_sys_exit_group (kernel/exit.c:1036) 
[ 45.436662][ C1] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 45.436845][ C1] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.437058][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.437224][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 45.437436][ C1] ? __debug_check_no_obj_freed (lib/debugobjects.c:1000) 
[ 45.437650][ C1] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:960) 
[ 45.437953][ C1] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:896 ./include/linux/mmzone.h:2029 arch/x86/mm/physaddr.c:65) 
[ 45.438119][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 45.438337][ C1] ? p9_client_clunk (net/9p/client.c:1459) 
[ 45.438505][ C1] kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 45.438765][ C1] kasan_save_free_info (mm/kasan/generic.c:582) 
[ 45.438926][ C1] __kasan_slab_free (mm/kasan/common.c:274) 
[ 45.439090][ C1] kfree (mm/slub.c:4280 mm/slub.c:4390) 
[ 45.439216][ C1] ? p9_client_clunk (net/9p/client.c:1459) 
[ 45.439480][ C1] p9_client_clunk (net/9p/client.c:1459) 
[ 45.439653][ C1] v9fs_dir_release (./include/net/9p/client.h:278 fs/9p/vfs_dir.c:224) 
[ 45.439828][ C1] __fput (fs/file_table.c:422) 
[ 45.439960][ C1] task_work_run (kernel/task_work.c:180 (discriminator 1)) 
[ 45.440125][ C1] ? __pfx_task_work_run (kernel/task_work.c:148) 
[ 45.440384][ C1] ? switch_task_namespaces (kernel/nsproxy.c:250) 
[ 45.440547][ C1] ? 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) 
[ 45.440726][ C1] do_exit (kernel/exit.c:879) 
[ 45.440859][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 45.441124][ C1] ? __pfx_do_exit (kernel/exit.c:819) 
[ 45.441294][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.441473][ C1] do_group_exit (kernel/exit.c:1008) 
[ 45.441649][ C1] __x64_sys_exit_group (kernel/exit.c:1036) 
[ 45.441821][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 45.442090][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   45.442298][    C1] RIP: 0033:0x7f848f79ba8d
[ 45.442513][ C1] Code: Unable to access opcode bytes at 0x7f848f79ba63.

Code starting with the faulting instruction
===========================================
[   45.442836][    C1] RSP: 002b:00007ffc37ea7058 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   45.443105][    C1] RAX: ffffffffffffffda RBX: 00007f848f8789c0 RCX: 00007f848f79ba8d
[   45.443369][    C1] RDX: 00000000000000e7 RSI: fffffffffffffe90 RDI: 0000000000000000
[   45.443830][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000060
[   45.444079][    C1] R10: 00007ffc37ea6e80 R11: 0000000000000246 R12: 00007f848f8789c0


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage