======================================
| [ 142.233840][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [  142.234027][    C0]
| [  142.234195][    C0]
| [  142.234195][    C0] stack backtrace:
[  142.234608][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  142.235036][    C0] Call Trace:
[  142.235156][    C0]  <IRQ>
[ 142.235234][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 142.235392][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 142.235671][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 142.235827][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 142.236017][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 142.236167][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 142.236416][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 142.236571][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 142.236722][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 142.236872][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 142.237026][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 142.237272][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 142.237387][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 142.237539][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 142.237653][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 142.237908][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 142.238059][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 142.238208][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 142.238357][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 142.238506][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 142.238750][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 142.238903][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 142.239071][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 142.239220][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 142.239463][ C0] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 142.239612][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 142.239761][ C0] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 142.239911][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 142.240157][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 142.240309][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 142.240459][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 142.240608][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 142.240861][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 142.241011][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 142.241160][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 142.241312][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 142.241462][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 142.241612][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 142.241730][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 142.241880][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 142.242030][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 142.242181][ C0] ? 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) 
[ 142.242330][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 142.242480][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 142.242630][ C0] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 142.242883][ C0] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 142.243036][ C0] __do_softirq (kernel/softirq.c:554) 
[ 142.243189][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 142.243303][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[  142.243452][    C0]  </IRQ>
[  142.243530][    C0]  <TASK>
[ 142.243606][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 142.243791][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 142.243984][ C0] Code: 10 e8 41 ea 91 fd 48 89 ef e8 79 5a 92 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d e5 61 26 69 <74> 0e 5b 5d c3 cc cc cc cc e8 6f 54 b5 fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	41 ea                	rex.B (bad)
   4:	91                   	xchg   %eax,%ecx
   5:	fd                   	std
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 79 5a 92 fd       	call   0xfffffffffd925a87
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d e5 61 26 69 	decl   %gs:0x692661e5(%rip)        # 0x6926620f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 6f 54 b5 fd       	call   0xfffffffffdb554a7
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 6f 54 b5 fd       	call   0xfffffffffdb5547d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[  142.244618][    C0] RSP: 0018:ffffc9000282f3e0 EFLAGS: 00000286
[  142.244811][    C0] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff312dc01
[  142.245134][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff96dd67f1
[  142.245359][    C0] RBP: ffffffff9814e4c0 R08: 0000000000000001 R09: fffffbfff312e482
[  142.245586][    C0] R10: ffffffff98972417 R11: ffffc9000282f1d1 R12: ffff888005774000
[  142.245909][    C0] R13: 0000000000001000 R14: 0000000000000001 R15: 0000000000000282
[ 142.246135][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 142.246322][ C0] __create_object (mm/kmemleak.c:756) 
[ 142.246567][ C0] ? p9_fcall_init (net/9p/client.c:232) 
[ 142.246716][ C0] __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 142.246832][ C0] p9_fcall_init (net/9p/client.c:232) 
[ 142.246986][ C0] p9_tag_alloc (net/9p/client.c:295) 
[ 142.247233][ C0] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 142.247383][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 142.247499][ C0] p9_client_prepare_req (net/9p/client.c:641) 
[ 142.247650][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 142.247838][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 142.248082][ C0] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 142.248231][ C0] ? 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) 
[ 142.248391][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 142.248541][ C0] ? v9fs_fid_find (fs/9p/fid.c:114) 
[ 142.248789][ C0] ? 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) 
[ 142.248940][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 142.249102][ C0] ? __pfx_v9fs_fid_find (fs/9p/fid.c:114) 
[ 142.249254][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 142.249499][ C0] p9_client_readlink (net/9p/client.c:2238) 
[ 142.249651][ C0] v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:822 fs/9p/vfs_inode_dotl.c:806) 
[ 142.249803][ C0] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 142.249989][ C0] ? try_to_unlazy (fs/namei.c:786) 
[ 142.250234][ C0] pick_link (fs/namei.c:1806) 
[ 142.250348][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 142.250501][ C0] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 142.250686][ C0] step_into (fs/namei.c:1874) 
[ 142.250807][ C0] ? read_word_at_a_time (./include/asm-generic/rwonce.h:86) 
[ 142.251051][ C0] ? __d_lookup_rcu (./arch/x86/include/asm/word-at-a-time.h:85 fs/dcache.c:226 fs/dcache.c:277 fs/dcache.c:2228) 
[ 142.251201][ C0] ? __pfx_step_into (fs/namei.c:1839) 
[ 142.251354][ C0] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 142.251543][ C0] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 142.251820][ C0] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 142.251968][ C0] ? 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) 
[ 142.252117][ C0] path_lookupat (fs/namei.c:2254 (discriminator 2) fs/namei.c:2484 (discriminator 2)) 
[ 142.252267][ C0] filename_lookup (fs/namei.c:2514) 
[ 142.252510][ C0] ? __pfx_filename_lookup (fs/namei.c:2508) 
[ 142.252665][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 142.252815][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 142.252964][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 142.253209][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 142.253359][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 142.253509][ C0] vfs_statx (fs/stat.c:244) 
[ 142.253623][ C0] ? __pfx_vfs_statx (fs/stat.c:234) 
[ 142.253877][ C0] ? getname_flags (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 fs/namei.c:190) 
[ 142.254026][ C0] vfs_fstatat (fs/stat.c:305) 
[ 142.254141][ C0] __do_sys_newfstatat (fs/stat.c:469) 
[ 142.254289][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 142.254440][ C0] ? __x64_sys_openat (fs/open.c:1432) 
[ 142.254589][ C0] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 142.254738][ C0] ? __pfx_do_faccessat (fs/open.c:465) 
[ 142.254890][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 142.255075][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 142.255318][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  142.255505][    C0] RIP: 0033:0x7f480a57deae
[ 142.255658][ C0] Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 07 00 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 0b 31 c0 c3 0f 1f 84 00 00 00 00 00 f7 d8 89 05
All code
========
   0:	48 89 f2             	mov    %rsi,%rdx
   3:	b9 00 01 00 00       	mov    $0x100,%ecx
   8:	48 89 fe             	mov    %rdi,%rsi
   b:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  10:	e9 07 00 00 00       	jmp    0x1c
  15:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	41 89 ca             	mov    %ecx,%r10d
  23:	b8 06 01 00 00       	mov    $0x106,%eax
  28:	0f 05                	syscall
  2a:*	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax		<-- trapping instruction
  2f:	77 0b                	ja     0x3c
  31:	31 c0                	xor    %eax,%eax
  33:	c3                   	ret
  34:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  3b:	00 
  3c:	f7 d8                	neg    %eax
  3e:	89                   	.byte 0x89
  3f:	05                   	.byte 0x5

Code starting with the faulting instruction
===========================================
   0:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   5:	77 0b                	ja     0x12
   7:	31 c0                	xor    %eax,%eax
   9:	c3                   	ret
   a:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  11:	00 
  12:	f7 d8                	neg    %eax
  14:	89                   	.byte 0x89
  15:	05                   	.byte 0x5
[  142.256283][    C0] RSP: 002b:00007ffcfd2d5618 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
[  142.256508][    C0] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00007f480a57deae
[  142.256827][    C0] RDX: 00007ffcfd2d56f0 RSI: 00007ffcfd2d5620 RDI: 00000000ffffff9c
[  142.257051][    C0] RBP: 00007ffcfd2d57b0 R08: 00000000ffffffff R09: 00007ffcfd2d5620
[  142.257272][    C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcfd2d5627


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage