======================================
| [ 38.687150][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   38.687355][    C1]
| [   38.687437][    C1]
| [   38.687437][    C1] stack backtrace:
[   38.687992][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   38.688354][    C1] Call Trace:
[   38.688478][    C1]  <IRQ>
[ 38.688569][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 38.688740][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 38.688948][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 38.689159][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 38.689521][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 38.689688][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 38.689856][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 38.690024][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 38.690293][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 38.690462][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 38.690632][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 38.690760][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 38.690888][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 38.691157][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 38.691322][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 38.691500][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 38.691664][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 38.691928][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 38.692092][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 38.692257][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 38.692421][ C1] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 38.692584][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 38.692849][ C1] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 38.693022][ C1] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 38.693189][ C1] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 38.693356][ C1] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009) 
[ 38.693666][ C1] ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 38.693833][ C1] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 38.693998][ C1] ? neigh_probe (net/core/neighbour.c:1074) 
[ 38.694163][ C1] neigh_probe (net/core/neighbour.c:1075) 
[ 38.694387][ C1] __neigh_event_send (net/core/neighbour.c:1242) 
[ 38.694554][ C1] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 38.694719][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 38.694884][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 38.695150][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 38.695315][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 38.695481][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 38.695605][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 38.695771][ C1] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336) 
[ 38.696073][ 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) 
[ 38.696237][ C1] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594) 
[ 38.696402][ C1] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494) 
[ 38.696569][ C1] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291) 
[ 38.696837][ 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) 
[ 38.696960][ 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) 
[ 38.697085][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 38.697250][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 38.697414][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 38.697578][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 38.697741][ C1] __netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 38.697946][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 38.698254][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 38.698420][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 38.698585][ C1] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 38.698752][ C1] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048) 
[ 38.698925][ C1] __napi_poll.constprop.0 (net/core/dev.c:6701) 
[ 38.699191][ C1] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886) 
[ 38.699360][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 38.699527][ C1] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 38.699693][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 38.699963][ C1] __do_softirq (kernel/softirq.c:554) 
[ 38.700128][ C1] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 38.700296][ C1] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) 
[   38.700421][    C1]  </IRQ>
[   38.700507][    C1]  <TASK>
[ 38.700691][ C1] __local_bh_enable_ip (kernel/softirq.c:382) 
[ 38.700858][ C1] __neigh_event_send (net/core/neighbour.c:1246) 
[ 38.701025][ C1] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 38.701190][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 38.701364][ C1] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 38.701629][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 38.701794][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 38.701960][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 38.702087][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 38.702450][ C1] ? vrf_l3_out (drivers/net/vrf.c:1035) vrf
[ 38.702624][ C1] ? ip6_local_out (net/ipv6/output_core.c:154) 
[ 38.702794][ C1] ip6_send_skb (net/ipv6/ip6_output.c:1956) 
[ 38.702960][ C1] rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 38.703242][ C1] ? __pfx_raw6_getfrag (net/ipv6/raw.c:711) 
[ 38.703408][ C1] ? ip6_append_data (net/ipv6/ip6_output.c:1835) 
[ 38.703575][ C1] ? __pfx_rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 38.703782][ C1] rawv6_sendmsg (net/ipv6/raw.c:926) 
[ 38.704045][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 38.704214][ C1] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741) 
[ 38.704382][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 38.704550][ 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) 
[ 38.704720][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 38.704990][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 38.705160][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 38.705325][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 38.705490][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 38.705657][ C1] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 38.705823][ C1] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 38.705988][ C1] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 38.706153][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 38.706325][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 38.706494][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 38.706660][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 38.706827][ C1] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 52)) 
[ 38.707094][ C1] ? __rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 38.707300][ C1] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 38.707510][ C1] __x64_sys_sendto (net/socket.c:2199) 
[ 38.707677][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 38.707989][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 38.708156][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   38.708361][    C1] RIP: 0033:0x7fbb5a72985a
[ 38.708540][ 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
[   38.709232][    C1] RSP: 002b:00007ffdaae9ee38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   38.709488][    C1] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fbb5a72985a
[   38.709738][    C1] RDX: 0000000000000040 RSI: 000000003e2bb340 RDI: 0000000000000005
[   38.709986][    C1] RBP: 00007ffdaae9eec0 R08: 0000000000418574 R09: 000000000000001c
[   38.710334][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000419ac0


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage