======================================
| [ 37.635461][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   37.635654][    C3]
| [   37.635735][    C3]
| [   37.635735][    C3] stack backtrace:
[   37.636167][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.636612][    C3] Call Trace:
[   37.636734][    C3]  <IRQ>
[ 37.636817][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 37.637092][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 37.637289][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 37.637489][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 37.637651][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 37.637907][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 37.638076][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 37.638234][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 37.638391][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 37.638652][ C3] ? save_trace (kernel/locking/lockdep.c:586) 
[ 37.638809][ C3] mark_lock (kernel/locking/lockdep.c:4678) 
[ 37.638928][ C3] mark_usage (kernel/locking/lockdep.c:4567) 
[ 37.639045][ C3] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 37.639208][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 37.639462][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.639620][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 37.639775][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 37.639932][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.640187][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 37.640342][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.640499][ C3] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 37.640654][ C3] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.640812][ C3] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.641066][ C3] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 37.641221][ C3] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 37.641385][ C3] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009) 
[ 37.641581][ C3] ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 37.641859][ C3] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 37.642015][ C3] ? neigh_probe (net/core/neighbour.c:1074) 
[ 37.642171][ C3] neigh_probe (net/core/neighbour.c:1075) 
[ 37.642292][ C3] __neigh_event_send (net/core/neighbour.c:1242) 
[ 37.642462][ C3] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 37.642617][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 37.642774][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 37.642929][ C3] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 37.643091][ C3] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 37.643246][ C3] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 37.643362][ C3] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 37.643517][ C3] ? ip6_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/ip6_route.h:336) 
[ 37.643715][ C3] 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) 
[ 37.643972][ C3] ? ip6_route_input (./include/linux/skbuff.h:1163 net/ipv6/route.c:2594) 
[ 37.644131][ C3] ? __pfx_ip6_forward (net/ipv6/ip6_output.c:494) 
[ 37.644297][ C3] ? ip6_rcv_core (./include/linux/skbuff.h:3202 net/ipv6/ip6_input.c:291) 
[ 37.644462][ C3] ? 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) 
[ 37.644580][ C3] 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) 
[ 37.644697][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 37.644859][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 37.645020][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 37.645178][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 37.645333][ C3] __netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 37.645531][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5597) 
[ 37.645724][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 37.645978][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 37.646133][ C3] ? process_backlog (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 net/core/dev.c:6046) 
[ 37.646289][ C3] process_backlog (./include/linux/rcupdate.h:810 net/core/dev.c:6048) 
[ 37.646445][ C3] __napi_poll.constprop.0 (net/core/dev.c:6701) 
[ 37.646608][ C3] net_rx_action (net/core/dev.c:6770 net/core/dev.c:6886) 
[ 37.646985][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 37.647141][ C3] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 37.647298][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 37.647456][ C3] __do_softirq (kernel/softirq.c:554) 
[ 37.647613][ C3] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 37.647772][ C3] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442) 
[   37.647890][    C3]  </IRQ>
[   37.647975][    C3]  <TASK>
[ 37.648055][ C3] __local_bh_enable_ip (kernel/softirq.c:382) 
[ 37.648210][ C3] __neigh_event_send (net/core/neighbour.c:1246) 
[ 37.648367][ C3] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 37.648523][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:387) 
[ 37.648677][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 37.648835][ C3] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 37.649097][ C3] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 37.649263][ C3] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 37.649386][ C3] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 37.649550][ C3] ? vrf_l3_out (drivers/net/vrf.c:1035) vrf
[ 37.649831][ C3] ? ip6_local_out (net/ipv6/output_core.c:154) 
[ 37.649990][ C3] ip6_send_skb (net/ipv6/ip6_output.c:1956) 
[ 37.650147][ C3] rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 37.650307][ C3] ? __pfx_raw6_getfrag (net/ipv6/raw.c:711) 
[ 37.650480][ C3] ? ip6_append_data (net/ipv6/ip6_output.c:1835) 
[ 37.650636][ C3] ? __pfx_rawv6_push_pending_frames (net/ipv6/raw.c:512) 
[ 37.650830][ C3] rawv6_sendmsg (net/ipv6/raw.c:926) 
[ 37.650989][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 37.651145][ C3] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741) 
[ 37.651301][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 37.651459][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 37.651620][ C3] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 37.651791][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 37.652052][ C3] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 37.652208][ C3] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 37.652371][ C3] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 37.652527][ C3] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 37.652793][ C3] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 37.652948][ C3] ? do_user_addr_fault (./include/linux/rcupdate.h:329 ./include/linux/rcupdate.h:781 ./include/linux/mm.h:700 arch/x86/mm/fault.c:1364) 
[ 37.653105][ C3] ? reacquire_held_locks (kernel/locking/lockdep.c:5279) 
[ 37.653262][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 37.653517][ C3] ? do_user_addr_fault (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 37.653673][ C3] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2749 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3317 kernel/locking/rwsem.c:1347) 
[ 37.653837][ C3] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 37.653997][ C3] ? do_user_addr_fault (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 37.654252][ C3] __x64_sys_sendto (net/socket.c:2199) 
[ 37.654407][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 37.654600][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 37.654761][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   37.655053][    C3] RIP: 0033:0x7f4e93e6f85a
[ 37.655216][ C3] 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
[   37.655906][    C3] RSP: 002b:00007ffdf8c99948 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   37.656143][    C3] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f4e93e6f85a
[   37.656376][    C3] RDX: 0000000000000040 RSI: 000000001bea5340 RDI: 0000000000000005
[   37.656612][    C3] RBP: 00007ffdf8c999d0 R08: 0000000000418574 R09: 000000000000001c
[   37.656846][    C3] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000419ac0


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage