======================================
| [ 39.268024][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   39.268234][    C0]
| [   39.268319][    C0]
| [   39.268319][    C0] stack backtrace:
[   39.268867][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   39.269321][    C0] Call Trace:
[   39.269441][    C0]  <IRQ>
[ 39.269524][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 39.269692][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 39.269887][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 39.270146][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 39.270339][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 39.270494][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 39.270650][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 39.270916][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 39.271081][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 39.271238][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 39.271398][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 39.271562][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 39.271680][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 39.271842][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 39.271960][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 39.272123][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 39.272279][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 39.272432][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 39.272586][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 39.272746][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 39.273008][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 39.273169][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 39.273324][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 39.273489][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 39.273645][ C0] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 39.273800][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 39.273953][ C0] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 39.274121][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 39.274370][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 39.274527][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 39.274678][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 39.274830][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 39.274987][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 39.275241][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 39.275395][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 39.275561][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 39.275726][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 39.275997][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 39.276129][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 39.276299][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 39.276468][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 39.276755][ 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) 
[ 39.276929][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 39.277094][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 39.277271][ C0] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 39.277447][ C0] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 39.277622][ C0] __do_softirq (kernel/softirq.c:554) 
[ 39.277800][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 39.277930][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   39.278105][    C0]  </IRQ>
[   39.278199][    C0]  <TASK>
[ 39.278282][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 39.278592][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 39.278830][ 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 86 7b <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 86 7b 	decl   %gs:0x7b8661e5(%rip)        # 0x7b86620f
  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
[   39.279552][    C0] RSP: 0018:ffffc90000eff330 EFLAGS: 00000282
[   39.279775][    C0] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff0c6dc01
[   39.280046][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff847d67f1
[   39.280315][    C0] RBP: ffff888001041080 R08: 0000000000000001 R09: fffffbfff0c6e482
[   39.280568][    C0] R10: ffffffff86372417 R11: 0000000000001000 R12: ffff888001041080
[   39.280968][    C0] R13: ffffea000019f600 R14: ffff8880010433c0 R15: ffff8880067dc000
[ 39.281255][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 39.281481][ C0] get_partial_node.part.0 (mm/slub.c:2623) 
[ 39.281863][ C0] ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 39.282035][ C0] ? fs_reclaim_acquire (mm/page_alloc.c:3715 mm/page_alloc.c:3706) 
[ 39.282207][ C0] ? p9_fcall_init (net/9p/client.c:232) 
[ 39.282400][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 39.282577][ C0] ? p9_fcall_init (net/9p/client.c:232) 
[ 39.282748][ C0] ? __kmalloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3965 mm/slub.c:3979) 
[ 39.282928][ C0] __kmalloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3965 mm/slub.c:3979) 
[ 39.283060][ C0] p9_fcall_init (net/9p/client.c:232) 
[ 39.283377][ C0] p9_tag_alloc (net/9p/client.c:295) 
[ 39.283581][ C0] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 39.283785][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 39.284159][ C0] p9_client_prepare_req (net/9p/client.c:641) 
[ 39.284405][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 39.284690][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 39.285123][ C0] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 39.285375][ 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) 
[ 39.285627][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 39.286049][ C0] ? v9fs_fid_find (fs/9p/fid.c:114) 
[ 39.286320][ 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) 
[ 39.286576][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 39.286829][ C0] ? __pfx_v9fs_fid_find (fs/9p/fid.c:114) 
[ 39.287261][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 39.287510][ C0] p9_client_readlink (net/9p/client.c:2238) 
[ 39.287783][ C0] v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:822 fs/9p/vfs_inode_dotl.c:806) 
[ 39.288048][ C0] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 39.288541][ C0] ? try_to_unlazy (fs/namei.c:786) 
[ 39.288787][ C0] pick_link (fs/namei.c:1806) 
[ 39.288972][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 39.289224][ C0] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 39.289701][ C0] step_into (fs/namei.c:1874) 
[ 39.289888][ C0] ? read_word_at_a_time (./include/asm-generic/rwonce.h:86) 
[ 39.290299][ 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) 
[ 39.290559][ C0] ? __pfx_step_into (fs/namei.c:1839) 
[ 39.290808][ C0] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 39.291300][ C0] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 39.291609][ C0] path_openat (fs/namei.c:3795) 
[ 39.292044][ C0] ? __pfx_path_openat (fs/namei.c:3781) 
[ 39.292308][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 39.292569][ C0] do_filp_open (fs/namei.c:3826) 
[ 39.292819][ C0] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 39.293088][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 39.293358][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 39.293749][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 39.293930][ 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) 
[ 39.294157][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 39.294372][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 39.294562][ C0] do_sys_openat2 (fs/open.c:1406) 
[ 39.294920][ C0] ? vfs_fstatat (fs/stat.c:308) 
[ 39.295090][ C0] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 39.295252][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 39.295422][ C0] __x64_sys_openat (fs/open.c:1432) 
[ 39.295702][ C0] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 39.295858][ C0] ? __pfx_do_faccessat (fs/open.c:465) 
[ 39.296028][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 39.296188][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   39.296384][    C0] RIP: 0033:0x7f0388dad0e8
[ 39.296552][ C0] Code: f9 41 89 f0 41 83 e2 40 75 30 89 f0 25 00 00 41 00 3d 00 00 41 00 74 22 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 30 c3 0f 1f 80 00 00 00 00 48 8d 44 24 08 c7
All code
========
   0:	f9                   	stc
   1:	41 89 f0             	mov    %esi,%r8d
   4:	41 83 e2 40          	and    $0x40,%r10d
   8:	75 30                	jne    0x3a
   a:	89 f0                	mov    %esi,%eax
   c:	25 00 00 41 00       	and    $0x410000,%eax
  11:	3d 00 00 41 00       	cmp    $0x410000,%eax
  16:	74 22                	je     0x3a
  18:	44 89 c2             	mov    %r8d,%edx
  1b:	4c 89 ce             	mov    %r9,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 30                	ja     0x62
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	48 8d 44 24 08       	lea    0x8(%rsp),%rax
  3f:	c7                   	.byte 0xc7

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 30                	ja     0x38
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	48 8d 44 24 08       	lea    0x8(%rsp),%rax
  15:	c7                   	.byte 0xc7
[   39.297115][    C0] RSP: 002b:00007ffcb842f868 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   39.297368][    C0] RAX: ffffffffffffffda RBX: 00007ffcb842faef RCX: 00007f0388dad0e8
[   39.297714][    C0] RDX: 0000000000080000 RSI: 00007ffcb842f8e0 RDI: 00000000ffffff9c
[   39.297956][    C0] RBP: 00007ffcb842f8d0 R08: 0000000000080000 R09: 00007ffcb842f8e0
[   39.298298][    C0] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffcb842f8e7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage