======================================
| [ 44.921884][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   44.922089][    C2]
| [   44.922178][    C2]
| [   44.922178][    C2] stack backtrace:
[   44.922828][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.923196][    C2] Call Trace:
[   44.923321][    C2]  <IRQ>
[ 44.923409][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 44.923580][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.923789][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 44.923964][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.924169][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 44.924426][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 44.924591][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 44.924756][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 44.924922][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 44.925182][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 44.925357][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.925520][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 44.925684][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 44.925905][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 44.926039][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 44.926204][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 44.926327][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 44.926492][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.926758][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 44.926919][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 44.927120][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 44.927284][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.927446][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 44.927609][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.927771][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 44.927937][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 44.928202][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 44.928364][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 44.928528][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 44.928690][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 44.928852][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.929128][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.929298][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.929460][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 44.929628][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 44.929901][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.930068][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.930231][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 44.930394][ 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) 
[ 44.930556][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.930722][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 44.930888][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 44.931050][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 44.931317][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.931484][ 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) 
[ 44.931646][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.931810][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.931975][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 44.932238][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 44.932403][ 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) 
[ 44.932566][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 44.932772][ 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) 
[ 44.933031][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 44.933152][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.933321][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 44.933484][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 44.933744][ 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) 
[ 44.933907][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 44.934069][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 44.934276][ C2] __do_softirq (kernel/softirq.c:554) 
[ 44.934445][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 44.934569][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   44.934730][    C2]  </IRQ>
[   44.934815][    C2]  <TASK>
[ 44.934896][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 44.935287][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 44.935499][ C2] Code: 10 e8 11 39 9b fd 48 89 ef e8 49 a9 9b 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 f5 ae 8f 63 <74> 0e 5b 5d c3 cc cc cc cc e8 3f a3 be fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	11 39                	adc    %edi,(%rcx)
   4:	9b                   	fwait
   5:	fd                   	std
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 49 a9 9b fd       	call   0xfffffffffd9ba957
   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 f5 ae 8f 63 	decl   %gs:0x638faef5(%rip)        # 0x638faf1f
  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 3f a3 be fd       	call   0xfffffffffdbea377
  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 3f a3 be fd       	call   0xfffffffffdbea34d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[   44.936180][    C2] RSP: 0018:ffffc9000068f3a0 EFLAGS: 00000286
[   44.936387][    C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff3f28271
[   44.936626][    C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9c741921
[   44.936964][    C2] RBP: ffff88800552a008 R08: 0000000000000001 R09: fffffbfff3f23caf
[   44.937208][    C2] R10: ffffffff9f91e57f R11: 0000000000000000 R12: dffffc0000000000
[   44.937449][    C2] R13: 0000000000000001 R14: 0000000000000286 R15: ffff88800552a078
[ 44.937794][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 44.937994][ C2] p9_virtio_request (net/9p/trans_virtio.c:305) 
[ 44.938161][ C2] ? trace_9p_client_req (./include/trace/events/9p.h:124 (discriminator 52)) 
[ 44.938323][ C2] ? __pfx_p9_virtio_request (net/9p/trans_virtio.c:256) 
[ 44.938586][ C2] ? p9_client_prepare_req (net/9p/client.c:625) 
[ 44.938746][ 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) 
[ 44.938920][ C2] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 44.939119][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 44.939377][ C2] p9_client_rpc (net/9p/client.c:703) 
[ 44.939540][ C2] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 44.939700][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.939865][ C2] ? p9_fid_create (./include/linux/local_lock_internal.h:38 ./include/linux/idr.h:174 net/9p/client.c:867) 
[ 44.940124][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.940284][ 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) 
[ 44.940446][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.940615][ C2] ? p9_fid_create (./include/linux/local_lock_internal.h:38 ./include/linux/idr.h:174 net/9p/client.c:867) 
[ 44.940873][ C2] p9_client_walk (net/9p/client.c:1169) 
[ 44.941041][ C2] ? __pfx_p9_client_walk (net/9p/client.c:1143) 
[ 44.941200][ C2] ? d_alloc_parallel (./arch/x86/include/asm/bitops.h:94 ./arch/x86/include/asm/bitops.h:112 ./include/asm-generic/bitops/instrumented-lock.h:43 ./include/linux/bit_spinlock.h:80 ./include/linux/list_bl.h:153 fs/dcache.c:2556) 
[ 44.941363][ C2] ? v9fs_fid_lookup_with_uid (fs/9p/fid.c:181) 
[ 44.941627][ C2] ? v9fs_vfs_lookup.part.0 (fs/9p/vfs_inode.c:676) 
[ 44.941791][ C2] v9fs_vfs_lookup.part.0 (fs/9p/vfs_inode.c:676) 
[ 44.941949][ C2] ? __pfx_v9fs_vfs_lookup.part.0 (fs/9p/vfs_inode.c:649) 
[ 44.942154][ C2] ? lockdep_init_map_type (kernel/locking/lockdep.c:4892) 
[ 44.942408][ C2] __lookup_slow (fs/namei.c:1692) 
[ 44.942574][ C2] ? __pfx___lookup_slow (fs/namei.c:1668) 
[ 44.942738][ C2] ? walk_component (fs/namei.c:1709 fs/namei.c:2004) 
[ 44.942902][ C2] walk_component (./include/linux/fs.h:808 fs/namei.c:1710 fs/namei.c:2004) 
[ 44.943072][ C2] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 44.943368][ C2] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 44.943569][ C2] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 44.943732][ 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) 
[ 44.943992][ C2] path_lookupat (fs/namei.c:2254 (discriminator 2) fs/namei.c:2484 (discriminator 2)) 
[ 44.944156][ C2] filename_lookup (fs/namei.c:2514) 
[ 44.944319][ C2] ? __pfx_filename_lookup (fs/namei.c:2508) 
[ 44.944493][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 44.944657][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.944923][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.945084][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.945245][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.945413][ C2] vfs_statx (fs/stat.c:244) 
[ 44.945540][ C2] ? __pfx_vfs_statx (fs/stat.c:234) 
[ 44.945704][ C2] ? 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) 
[ 44.945867][ C2] vfs_fstatat (fs/stat.c:305) 
[ 44.945999][ C2] __do_sys_newfstatat (fs/stat.c:469) 
[ 44.946163][ C2] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 44.946427][ C2] ? __x64_sys_openat (fs/open.c:1432) 
[ 44.946591][ C2] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 44.946749][ C2] ? __pfx_do_faccessat (fs/open.c:465) 
[ 44.946915][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.947211][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 44.947375][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   44.947586][    C2] RIP: 0033:0x7f1654d08eae
[ 44.947759][ C2] 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
[   44.948542][    C2] RSP: 002b:00007fffd96906b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
[   44.948905][    C2] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007f1654d08eae
[   44.949153][    C2] RDX: 00007fffd9690780 RSI: 00007fffd96906c0 RDI: 00000000ffffff9c
[   44.949403][    C2] RBP: 00007fffd9690840 R08: 00000000ffffffff R09: 00007fffd96906c0
[   44.949645][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffd96906c7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage