======================================
| [ 51.552076][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   51.552282][    C0]
| [   51.552461][    C0]
| [   51.552461][    C0] stack backtrace:
[   51.552911][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   51.553477][    C0] Call Trace:
[   51.553600][    C0]  <IRQ>
[ 51.553684][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 51.553850][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 51.554226][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 51.554557][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 51.554822][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 51.555024][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 51.555305][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 51.555472][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 51.555635][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 51.555799][ C0] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 51.556055][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 51.556227][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 51.556352][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 51.556473][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 51.556640][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 51.556905][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.557207][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 51.557369][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.557609][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 51.557871][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 51.558036][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.558286][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.558454][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.558792][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 51.558952][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.559196][ C0] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 51.559531][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.559807][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 51.559975][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 51.560147][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 51.560404][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 51.560570][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 51.560696][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 51.560860][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 51.561241][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 51.561403][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.561657][ 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) 
[ 51.561914][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 51.562334][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.562600][ C0] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 51.562867][ C0] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 51.563129][ C0] 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) 
[ 51.563568][ C0] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 51.563916][ C0] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 51.564141][ C0] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 51.564303][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 51.564562][ C0] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 51.564727][ C0] __do_softirq (kernel/softirq.c:554) 
[ 51.564889][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 51.565012][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   51.565185][    C0]  </IRQ>
[   51.565363][    C0]  <TASK>
[ 51.565446][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 51.565650][ C0] RIP: 0010:arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 51.565820][ C0] Code: 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 75 ca 48 8b
All code
========
   0:	ff                   	(bad)
   1:	ff 85 d2 75 24 eb    	incl   -0x14db8a2e(%rbp)
   7:	36 4c 89 e7          	ss mov %r12,%rdi
   b:	ff d3                	call   *%rbx
   d:	0f 1f 00             	nopl   (%rax)
  10:	84 c0                	test   %al,%al
  12:	74 2a                	je     0x3e
  14:	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi
  1b:	e8 b4 16 07 00       	call   0x716d4
  20:	8b 85 68 ff ff ff    	mov    -0x98(%rbp),%eax
  26:	85 c0                	test   %eax,%eax
  28:	74 14                	je     0x3e
  2a:*	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi		<-- trapping instruction
  31:	e8 6e 10 07 00       	call   0x710a4
  36:	48 89 c6             	mov    %rax,%rsi
  39:	48 85 c0             	test   %rax,%rax
  3c:	75 ca                	jne    0x8
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	48 8d bd 68 ff ff ff 	lea    -0x98(%rbp),%rdi
   7:	e8 6e 10 07 00       	call   0x7107a
   c:	48 89 c6             	mov    %rax,%rsi
   f:	48 85 c0             	test   %rax,%rax
  12:	75 ca                	jne    0xffffffffffffffde
  14:	48                   	rex.W
  15:	8b                   	.byte 0x8b
[   51.566504][    C0] RSP: 0018:ffffc9000056f610 EFLAGS: 00000202
[   51.566715][    C0] RAX: 0000000000000001 RBX: ffffffff8e3c8260 RCX: ffffc90000570001
[   51.567080][    C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffc9000056f620
[   51.567323][    C0] RBP: ffffc9000056f6a8 R08: ffffc9000056f650 R09: fffff520000adeab
[   51.567568][    C0] R10: ffffc9000056f610 R11: ffffc9000056f651 R12: ffffc9000056f6d8
[   51.568005][    C0] R13: 0000000000000000 R14: ffff8880059d45c0 R15: ffff88800196b9c0
[ 51.568255][ C0] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 51.568469][ C0] ? kmem_cache_alloc_node (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3888) 
[ 51.568729][ C0] stack_trace_save (kernel/stacktrace.c:123) 
[ 51.568893][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 51.569053][ C0] ? ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 51.569224][ C0] ? kmem_cache_alloc (./include/linux/sched/mm.h:315 mm/slub.c:3746 mm/slub.c:3827 mm/slub.c:3852) 
[ 51.569477][ C0] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 51.569641][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 51.569802][ C0] set_track_prepare (mm/slub.c:889) 
[ 51.569969][ C0] ? __pfx_set_track_prepare (mm/slub.c:880) 
[ 51.570173][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 51.570615][ C0] ? lockdep_init_map_type (kernel/locking/lockdep.c:4892) 
[ 51.570878][ C0] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 51.571053][ C0] __alloc_object (mm/kmemleak.c:681) 
[ 51.571228][ C0] __create_object (mm/kmemleak.c:750) 
[ 51.571487][ C0] kmem_cache_alloc_node (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3888) 
[ 51.571650][ C0] ? kmalloc_reserve (net/core/skbuff.c:577) 
[ 51.571817][ C0] kmalloc_reserve (net/core/skbuff.c:580) 
[ 51.571978][ C0] __alloc_skb (net/core/skbuff.c:668) 
[ 51.572246][ C0] ? __pfx___alloc_skb (net/core/skbuff.c:641) 
[ 51.572405][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.572567][ C0] ? dev_queue_xmit_nit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:2332) 
[ 51.572727][ 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) 
[ 51.572982][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 51.573111][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.573272][ C0] alloc_skb_with_frags (./include/linux/skbuff.h:1313 net/core/skbuff.c:6477) 
[ 51.573437][ C0] sock_alloc_send_pskb (net/core/sock.c:2796) 
[ 51.573597][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 51.573857][ C0] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2767) 
[ 51.574017][ C0] ? dev_get_by_index (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/core/dev.c:888) 
[ 51.574185][ C0] packet_snd (net/packet/af_packet.c:2930 net/packet/af_packet.c:3024) 
[ 51.574346][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 51.574601][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 51.574760][ C0] ? __pfx_packet_snd (net/packet/af_packet.c:2944) 
[ 51.574927][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 51.575152][ C0] ? trace_raw_output_mmap_lock_acquire_returned (./include/trace/events/mmap_lock.h:52 (discriminator 2)) 
[ 51.575669][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 51.575922][ C0] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 51.576181][ C0] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 51.576445][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 51.576891][ C0] ? sock_ioctl (net/socket.c:1344) 
[ 51.577175][ C0] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 51.577516][ C0] __x64_sys_sendto (net/socket.c:2199) 
[ 51.577726][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 51.578023][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 51.578202][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   51.578409][    C0] RIP: 0033:0x7f82cb75785a
[ 51.578578][ C0] 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
[   51.579253][    C0] RSP: 002b:00007ffc2e94d218 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   51.579609][    C0] RAX: ffffffffffffffda RBX: 00000000039819d0 RCX: 00007f82cb75785a
[   51.579852][    C0] RDX: 0000000000001f6a RSI: 00000000039858e2 RDI: 0000000000000005
[   51.580101][    C0] RBP: 00000000039858e2 R08: 00007ffc2e94d220 R09: 0000000000000014
[   51.580443][    C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage