======================================
| [ 51.573711][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   51.573896][    C2]
| [   51.573971][    C2]
| [   51.573971][    C2] stack backtrace:
[   51.574493][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   51.574844][    C2] Call Trace:
[   51.574966][    C2]  <IRQ>
[ 51.575046][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 51.575298][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 51.575493][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 51.575690][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 51.575934][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 51.576084][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 51.576236][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 51.576393][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 51.576545][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 51.576790][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 51.576940][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 51.577063][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 51.577177][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 51.577424][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 51.577617][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.577883][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 51.578035][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.578360][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 51.578518][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 51.578668][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.578902][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.579150][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.579372][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 51.579525][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.579845][ C2] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.580100][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.580373][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 51.580533][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 51.580781][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 51.580942][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 51.581105][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 51.581230][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 51.581484][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.581768][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 51.581930][ 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) 
[ 51.582091][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 51.582350][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.582511][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 51.582674][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 51.582856][ C2] __do_softirq (kernel/softirq.c:554) 
[ 51.583109][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 51.583238][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   51.583402][    C2]  </IRQ>
[   51.583489][    C2]  <TASK>
[ 51.583610][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 51.583811][ C2] RIP: 0010:arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 51.584101][ C2] Code: 8b 95 68 ff ff ff 85 d2 75 24 eb 36 4c 89 e7 ff d3 0f 1f 00 84 c0 74 2a 48 8d bd 68 ff ff ff e8 b4 16 07 00 8b 85 68 ff ff ff <85> c0 74 14 48 8d bd 68 ff ff ff e8 6e 10 07 00 48 89 c6 48 85 c0
All code
========
   0:	8b 95 68 ff ff ff    	mov    -0x98(%rbp),%edx
   6:	85 d2                	test   %edx,%edx
   8:	75 24                	jne    0x2e
   a:	eb 36                	jmp    0x42
   c:	4c 89 e7             	mov    %r12,%rdi
   f:	ff d3                	call   *%rbx
  11:	0f 1f 00             	nopl   (%rax)
  14:	84 c0                	test   %al,%al
  16:	74 2a                	je     0x42
  18:	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi
  1f:	e8 b4 16 07 00       	call   0x716d8
  24:	8b 85 68 ff ff ff    	mov    -0x98(%rbp),%eax
  2a:*	85 c0                	test   %eax,%eax		<-- trapping instruction
  2c:	74 14                	je     0x42
  2e:	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi
  35:	e8 6e 10 07 00       	call   0x710a8
  3a:	48 89 c6             	mov    %rax,%rsi
  3d:	48 85 c0             	test   %rax,%rax

Code starting with the faulting instruction
===========================================
   0:	85 c0                	test   %eax,%eax
   2:	74 14                	je     0x18
   4:	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi
   b:	e8 6e 10 07 00       	call   0x7107e
  10:	48 89 c6             	mov    %rax,%rsi
  13:	48 85 c0             	test   %rax,%rax
[   51.584740][    C2] RSP: 0018:ffffc9000053f4a8 EFLAGS: 00000292
[   51.584940][    C2] RAX: 0000000000000001 RBX: ffffffff93bc8260 RCX: ffffc90000540001
[   51.585164][    C2] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffc9000053f4b8
[   51.585487][    C2] RBP: ffffc9000053f540 R08: ffffc9000053f4e8 R09: fffff520000a7e7e
[   51.585713][    C2] R10: ffffc9000053f4a8 R11: ffffc9000053f4e9 R12: ffffc9000053f570
[   51.585945][    C2] R13: 0000000000000000 R14: ffff888005a6a300 R15: 0000000000092cc0
[ 51.586363][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 51.586551][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 51.586701][ C2] ? sock_alloc_send_pskb (net/core/sock.c:2796) 
[ 51.586865][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 51.587110][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 51.587260][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 51.587414][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 51.587564][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 51.587805][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 51.587953][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:341) 
[ 51.588103][ C2] ? kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 51.588252][ C2] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 51.588402][ C2] ? __create_object (mm/kmemleak.c:750) 
[ 51.588643][ C2] ? kmem_cache_alloc_node (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3888) 
[ 51.588791][ C2] ? __alloc_skb (net/core/skbuff.c:658) 
[ 51.588944][ C2] ? alloc_skb_with_frags (./include/linux/skbuff.h:1313 net/core/skbuff.c:6477) 
[ 51.589097][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 51.589377][ C2] ? get_partial_node.part.0 (mm/slub.c:2623) 
[ 51.589526][ C2] ? ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 51.589678][ C2] ? kmem_cache_alloc (./include/linux/sched/mm.h:315 mm/slub.c:3746 mm/slub.c:3827 mm/slub.c:3852) 
[ 51.589826][ C2] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 51.590068][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 51.590222][ C2] kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 51.590376][ C2] __kasan_slab_alloc (mm/kasan/common.c:341) 
[ 51.590524][ C2] kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 51.590774][ C2] __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 51.590930][ C2] __create_object (mm/kmemleak.c:750) 
[ 51.591079][ C2] kmem_cache_alloc_node (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3888) 
[ 51.591227][ C2] ? __alloc_skb (net/core/skbuff.c:684) 
[ 51.591474][ C2] __alloc_skb (net/core/skbuff.c:658) 
[ 51.591622][ C2] ? __pfx___alloc_skb (net/core/skbuff.c:641) 
[ 51.591770][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.591924][ C2] ? dev_queue_xmit_nit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:2332) 
[ 51.592075][ 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) 
[ 51.592321][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 51.592436][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.592585][ C2] alloc_skb_with_frags (./include/linux/skbuff.h:1313 net/core/skbuff.c:6477) 
[ 51.592735][ C2] sock_alloc_send_pskb (net/core/sock.c:2796) 
[ 51.592978][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 51.593127][ C2] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2767) 
[ 51.593290][ C2] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) 
[ 51.593449][ C2] packet_snd (net/packet/af_packet.c:2930 net/packet/af_packet.c:3024) 
[ 51.593702][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.593866][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 51.594027][ C2] ? __pfx_packet_snd (net/packet/af_packet.c:2944) 
[ 51.594225][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 51.594389][ C2] ? trace_raw_output_mmap_lock_acquire_returned (./include/trace/events/mmap_lock.h:52 (discriminator 2)) 
[ 51.594732][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 51.594915][ C2] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 51.595081][ C2] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 51.595341][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.595507][ C2] ? sock_ioctl (net/socket.c:1344) 
[ 51.595671][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 51.595839][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 51.596138][ C2] __x64_sys_sendto (net/socket.c:2199) 
[ 51.596302][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 51.596512][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 51.596676][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   51.596974][    C2] RIP: 0033:0x7fcb3b58b85a
[ 51.597149][ C2] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[   51.597820][    C2] RSP: 002b:00007ffd9c4bef88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   51.598072][    C2] RAX: ffffffffffffffda RBX: 00000000214cb9d0 RCX: 00007fcb3b58b85a
[   51.598317][    C2] RDX: 0000000000001f6a RSI: 00000000214cf8e2 RDI: 0000000000000005
[   51.598760][    C2] RBP: 00000000214cf8e2 R08: 00007ffd9c4bef90 R09: 0000000000000014
[   51.599014][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage