======================================
| [ 32.344018][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   32.344207][    C2]
| [   32.344284][    C2]
| [   32.344284][    C2] stack backtrace:
[   32.344804][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   32.345152][    C2] Call Trace:
[   32.345270][    C2]  <IRQ>
[ 32.345462][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 32.345620][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 32.345812][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.345967][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 32.346166][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 32.346322][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 32.346475][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 32.346630][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 32.346890][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 32.347044][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.347200][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 32.347357][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 32.347473][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.347724][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 32.347840][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 32.347994][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 32.348158][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.348419][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 32.348573][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.348726][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.348880][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 32.349034][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.349186][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.349339][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.349494][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 32.349656][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.349908][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.350061][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.350215][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.350369][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.350619][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.350772][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.350925][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.351081][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 32.351334][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.351488][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.351643][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 32.351796][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 32.351959][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 32.352212][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 32.352367][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.352520][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 32.352677][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 32.352927][ C2] ? 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) 
[ 32.353081][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.353233][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.353387][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 32.353639][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 32.353793][ C2] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 kernel/time/timer_migration.c:925) 
[ 32.353949][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 32.354143][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 32.354393][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 32.354510][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 32.354666][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 32.354820][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 32.354978][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 32.355232][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 32.355387][ C2] __do_softirq (kernel/softirq.c:554) 
[ 32.355544][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 32.355661][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   32.355911][    C2]  </IRQ>
[   32.355991][    C2]  <TASK>
[ 32.356085][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 32.356276][ C2] RIP: 0010:memchr_inv (lib/string.c:856) 
[ 32.356439][ C2] Code: cc cc cc cc 48 83 c4 10 48 89 d8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 48 89 df 48 89 04 24 e8 cc 6c f3 fd 48 8b 04 24 <e9> d2 fe ff ff 48 89 c7 48 89 74 24 08 48 89 04 24 e8 22 6c f3 fd
All code
========
   0:	cc                   	int3
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	48 83 c4 10          	add    $0x10,%rsp
   8:	48 89 d8             	mov    %rbx,%rax
   b:	5b                   	pop    %rbx
   c:	5d                   	pop    %rbp
   d:	41 5c                	pop    %r12
   f:	41 5d                	pop    %r13
  11:	41 5e                	pop    %r14
  13:	41 5f                	pop    %r15
  15:	c3                   	ret
  16:	cc                   	int3
  17:	cc                   	int3
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	48 89 df             	mov    %rbx,%rdi
  1d:	48 89 04 24          	mov    %rax,(%rsp)
  21:	e8 cc 6c f3 fd       	call   0xfffffffffdf36cf2
  26:	48 8b 04 24          	mov    (%rsp),%rax
  2a:*	e9 d2 fe ff ff       	jmp    0xffffffffffffff01		<-- trapping instruction
  2f:	48 89 c7             	mov    %rax,%rdi
  32:	48 89 74 24 08       	mov    %rsi,0x8(%rsp)
  37:	48 89 04 24          	mov    %rax,(%rsp)
  3b:	e8 22 6c f3 fd       	call   0xfffffffffdf36c62

Code starting with the faulting instruction
===========================================
   0:	e9 d2 fe ff ff       	jmp    0xfffffffffffffed7
   5:	48 89 c7             	mov    %rax,%rdi
   8:	48 89 74 24 08       	mov    %rsi,0x8(%rsp)
   d:	48 89 04 24          	mov    %rax,(%rsp)
  11:	e8 22 6c f3 fd       	call   0xfffffffffdf36c38
[   32.357096][    C2] RSP: 0018:ffffc90000b5f868 EFLAGS: 00000286
[   32.357299][    C2] RAX: ffff88800875e000 RBX: ffff88800875d720 RCX: ffffffff9b458784
[   32.357637][    C2] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800875d720
[   32.357866][    C2] RBP: 0000000000001f98 R08: ffff88800875c064 R09: 000000000000005a
[   32.358108][    C2] R10: 0000000000000008 R11: 0000000000002000 R12: 5a5a5a5a5a5a5a5a
[   32.358340][    C2] R13: 000000000000005a R14: dffffc0000000000 R15: ffff88800875c068
[ 32.358571][ C2] ? memchr_inv (lib/string.c:856) 
[ 32.358726][ C2] ? memchr_inv (lib/string.c:856) 
[ 32.358977][ C2] check_bytes_and_report (mm/slub.c:1175) 
[ 32.359132][ C2] check_object (mm/slub.c:853 mm/slub.c:1353) 
[ 32.359286][ C2] free_slab (mm/slub.c:2424 (discriminator 3)) 
[ 32.359410][ C2] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 32.359665][ C2] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 32.359819][ C2] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 32.359973][ C2] kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 32.360126][ C2] ? __vm_munmap (mm/mmap.c:2972) 
[ 32.360381][ C2] ? do_munmap (mm/mmap.c:2710) 
[ 32.360500][ C2] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 32.360653][ C2] p9_tag_alloc (net/9p/client.c:285) 
[ 32.360806][ C2] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 32.360963][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 32.361127][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 32.361281][ C2] ? __virt_addr_valid (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:894 ./include/linux/mmzone.h:2029 arch/x86/mm/physaddr.c:65) 
[ 32.361436][ C2] p9_client_prepare_req (net/9p/client.c:641) 
[ 32.361592][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 32.361841][ C2] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 32.362031][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 32.362185][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 32.362341][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 32.362556][ C2] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 32.362712][ C2] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 32.362865][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 32.362981][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 32.363135][ C2] ? v9fs_dir_release (./include/net/9p/client.h:269 fs/9p/vfs_dir.c:224) 
[ 32.363385][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 32.363537][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.363694][ C2] ? 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) 
[ 32.363855][ C2] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 32.364104][ C2] v9fs_dir_release (./include/net/9p/client.h:278 fs/9p/vfs_dir.c:224) 
[ 32.364258][ C2] __fput (fs/file_table.c:422) 
[ 32.364382][ C2] task_work_run (kernel/task_work.c:180 (discriminator 1)) 
[ 32.364535][ C2] ? __pfx_task_work_run (kernel/task_work.c:148) 
[ 32.364690][ C2] syscall_exit_to_user_mode (./include/linux/resume_user_mode.h:50 kernel/entry/common.c:114 ./include/linux/entry-common.h:328 kernel/entry/common.c:207 kernel/entry/common.c:218) 
[ 32.364941][ C2] do_syscall_64 (arch/x86/entry/common.c:102) 
[ 32.365093][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   32.365286][    C2] RIP: 0033:0x7fb110c50e8b
[ 32.365444][ C2] Code: ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 45 9f 1b 00 f7 d8 64 89 01 48
All code
========
   0:	ff                   	(bad)
   1:	ff 73 01             	push   0x1(%rbx)
   4:	c3                   	ret
   5:	48 8b 0d 73 9f 1b 00 	mov    0x1b9f73(%rip),%rcx        # 0x1b9f7f
   c:	f7 d8                	neg    %eax
   e:	64 89 01             	mov    %eax,%fs:(%rcx)
  11:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  15:	c3                   	ret
  16:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  1d:	00 00 
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 0b 00 00 00       	mov    $0xb,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 45 9f 1b 00 	mov    0x1b9f45(%rip),%rcx        # 0x1b9f7f
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 45 9f 1b 00 	mov    0x1b9f45(%rip),%rcx        # 0x1b9f55
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[   32.366093][    C2] RSP: 002b:00007ffd73fb2708 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
[   32.366425][    C2] RAX: 0000000000000000 RBX: 0000558dd081b358 RCX: 00007fb110c50e8b
[   32.366659][    C2] RDX: 00005588885cbccb RSI: 0000000000004202 RDI: 00007fb110bf1000
[   32.366887][    C2] RBP: 0000558dd081c960 R08: 0000558dd081b570 R09: 0000000000000000
[   32.367314][    C2] R10: 0000000000000000 R11: 0000000000000206 R12: 0000558dd081b370


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage