======================================
| [ 36.879099][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   36.879313][    C1]
| [   36.879399][    C1]
| [   36.879399][    C1] stack backtrace:
[   36.879964][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   36.880347][    C1] Call Trace:
[   36.880480][    C1]  <IRQ>
[ 36.880567][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 36.880871][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 36.881091][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 36.881312][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 36.881483][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 36.881652][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 36.881830][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 36.882018][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 36.882190][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 36.882378][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 36.882549][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 36.882679][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 36.882808][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 36.882983][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 36.883358][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.883531][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 36.883703][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 36.883873][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.884154][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.884323][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.884495][ C1] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 36.884678][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.884947][ C1] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.885128][ C1] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 36.885297][ C1] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 36.885466][ C1] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009) 
[ 36.885786][ C1] ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 36.885956][ C1] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 36.886168][ C1] ? neigh_probe (net/core/neighbour.c:1074) 
[ 36.886340][ C1] neigh_probe (net/core/neighbour.c:1075) 
[ 36.886470][ C1] __neigh_event_send (net/core/neighbour.c:1242) 
[ 36.886641][ C1] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 36.886811][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 36.886980][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 36.887161][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 36.887331][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 36.887499][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 36.887624][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 36.887793][ C1] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336) 
[ 36.888172][ C1] ip6_forward (./include/net/dst.h:450 net/ipv6/ip6_output.c:472 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_output.c:660) 
[ 36.888384][ C1] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594) 
[ 36.888653][ C1] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494) 
[ 36.888894][ C1] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291) 
[ 36.889304][ C1] ? ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 36.889502][ C1] ipv6_rcv (./include/net/dst.h:460 ./include/net/dst.h:458 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 36.889706][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 36.889967][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 36.890228][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 36.890672][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 36.890950][ C1] __netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 36.891279][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 36.891609][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 36.891878][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.892151][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 36.892421][ C1] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048) 
[ 36.892693][ C1] ? __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2418) 
[ 36.892975][ C1] __napi_poll.constprop.0 (net/core/dev.c:6701) 
[ 36.893253][ C1] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886) 
[ 36.893524][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 36.893790][ C1] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 36.894243][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 36.894518][ C1] __do_softirq (kernel/softirq.c:554) 
[ 36.894812][ C1] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 36.895092][ C1] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) 
[   36.895308][    C1]  </IRQ>
[   36.895631][    C1]  <TASK>
[ 36.895786][ C1] __local_bh_enable_ip (kernel/softirq.c:382) 
[ 36.896047][ C1] __neigh_event_send (net/core/neighbour.c:1246) 
[ 36.896321][ C1] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 36.896582][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 36.897015][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 36.897283][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 36.897558][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 36.897827][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 36.898032][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 36.898482][ C1] ? vrf_l3_out (drivers/net/vrf.c:1035) vrf
[ 36.898770][ C1] ? ip6_local_out (net/ipv6/output_core.c:154) 
[ 36.899044][ C1] ip6_send_skb (net/ipv6/ip6_output.c:1956) 
[ 36.899318][ C1] rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 36.899763][ C1] ? __pfx_raw6_getfrag (net/ipv6/raw.c:711) 
[ 36.900031][ C1] ? ip6_append_data (net/ipv6/ip6_output.c:1835) 
[ 36.900299][ C1] ? __pfx_rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 36.900636][ C1] rawv6_sendmsg (net/ipv6/raw.c:926) 
[ 36.901244][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 36.901521][ C1] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741) 
[ 36.901797][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 36.902082][ C1] ? 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) 
[ 36.902543][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 36.902820][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 36.903110][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.903386][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 36.903848][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 36.904137][ C1] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 36.904416][ C1] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 36.904705][ C1] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 36.904982][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 36.905267][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 36.905550][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.905831][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 36.906110][ C1] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 52)) 
[ 36.906396][ C1] ? __rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 36.906749][ C1] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 36.907099][ C1] __x64_sys_sendto (net/socket.c:2199) 
[ 36.907385][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 36.907908][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 36.908192][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   36.908545][    C1] RIP: 0033:0x7fb29a40f85a
[ 36.909015][ C1] 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
[   36.910018][    C1] RSP: 002b:00007ffe74a891a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   36.910641][    C1] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fb29a40f85a
[   36.911083][    C1] RDX: 0000000000000040 RSI: 00000000268b1340 RDI: 0000000000000005
[   36.911518][    C1] RBP: 00007ffe74a89230 R08: 0000000000418574 R09: 000000000000001c
[   36.912138][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000419ac0


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage