======================================
| [  656.587347][    C3]    entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
| [  656.587462][    C3]
| [  656.587509][    C3]
| [  656.587509][    C3] stack backtrace:
[  656.587681][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  656.587683][    C3] Call Trace:
[  656.587685][    C3]  <IRQ>
[  656.587686][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  656.587689][    C3]  print_irq_inversion_bug.part.0.cold (kernel/locking/lockdep.c:4125)
[  656.587692][    C3]  mark_lock_irq (kernel/locking/lockdep.c:4079 kernel/locking/lockdep.c:4158 kernel/locking/lockdep.c:4294)
[  656.587695][    C3]  mark_lock (kernel/locking/lockdep.c:4753)
[  656.587697][    C3]  mark_usage (kernel/locking/lockdep.c:4642)
[  656.587698][    C3]  __lock_acquire (kernel/locking/lockdep.c:5191)
[  656.587700][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  656.587702][    C3]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  656.587703][    C3]  ? ipv6_get_lladdr (net/ipv6/addrconf.c:1941)
[  656.587705][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  656.587709][    C3]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  656.587711][    C3]  _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:192 (discriminator 3) kernel/locking/spinlock.c:256 (discriminator 3))
[  656.587712][    C3]  ? ipv6_get_lladdr (net/ipv6/addrconf.c:1941)
[  656.587714][    C3]  ipv6_get_lladdr (net/ipv6/addrconf.c:1941)
[  656.587716][    C3]  ndisc_send_ns (net/ipv6/ndisc.c:662)
[  656.587718][    C3]  ? __ipv6_chk_addr_and_flags (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/ipv6/addrconf.c:2015 (discriminator 2))
[  656.587720][    C3]  ? ndisc_parse_options (net/ipv6/ndisc.c:285)
[  656.587721][    C3]  ? __ipv6_chk_addr_and_flags (./include/linux/rcupdate.h:871 net/ipv6/addrconf.c:2015)
[  656.587724][    C3]  ndisc_solicit (net/ipv6/ndisc.c:762)
[  656.587726][    C3]  ? ndisc_send_ns (net/ipv6/ndisc.c:672)
[  656.587727][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  656.587728][    C3]  ? neigh_probe (net/core/neighbour.c:1094)
[  656.587730][    C3]  neigh_probe (net/core/neighbour.c:1096)
[  656.587732][    C3]  __neigh_event_send (net/core/neighbour.c:1276)
[  656.587734][    C3]  ? warn_bogus_irq_restore (kernel/locking/irqflag-debug.c:8)
[  656.587736][    C3]  ? ___neigh_create (./include/linux/spinlock.h:396 net/core/neighbour.c:724)
[  656.587738][    C3]  neigh_resolve_output (./include/net/neighbour.h:480 ./include/net/neighbour.h:486 ./include/net/neighbour.h:484 net/core/neighbour.c:1603)
[  656.587740][    C3]  ip6_finish_output2 (./include/net/neighbour.h:560 (discriminator 3) net/ipv6/ip6_output.c:136 (discriminator 3))
[  656.587742][    C3]  ? ip6_xmit (net/ipv6/ip6_output.c:328)
[  656.587744][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  656.587746][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  656.587747][    C3]  ? ip6_mtu (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/net/ip6_route.h:382 (discriminator 2) net/ipv6/route.c:3288 (discriminator 2))
[  656.587749][    C3]  ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)
[  656.587752][    C3]  ip6_output (./include/linux/netfilter.h:307 net/ipv6/ip6_output.c:246)
[  656.587753][    C3]  ? ip6_finish_output (./include/linux/skbuff.h:1167)
[  656.587755][    C3]  ? l3mdev_l3_out.constprop.0 (./include/linux/rcupdate.h:871 ./include/net/l3mdev.h:222)
[  656.587758][    C3]  ip6_send_skb (net/ipv6/ip6_output.c:2018)
[  656.587760][    C3]  icmp6_send (net/ipv6/icmp.c:827)
[  656.587763][    C3]  ? icmpv6_push_pending_frames (net/ipv6/icmp.c:292 (discriminator 1))
[  656.587765][    C3]  ? __local_bh_enable_ip (kernel/softirq.c:455)
[  656.587767][    C3]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  656.587769][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  656.587772][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  656.587773][    C3]  ? tcf_qevent_handle (./include/net/sch_generic.h:1252)
[  656.587776][    C3]  udpv6_rcv (./include/linux/icmpv6.h:24 net/ipv6/udp.c:1159)
[  656.587779][    C3]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[  656.587782][    C3]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[  656.587784][    C3]  ip6_input (./include/linux/netfilter.h:318 ./include/linux/netfilter.h:312 net/ipv6/ip6_input.c:545)
[  656.587786][    C3]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[  656.587788][    C3]  ? ip6_rcv_core (./include/linux/skbuff.h:3394 net/ipv6/ip6_input.c:332)
[  656.587790][    C3]  ipv6_rcv (./include/net/dst.h:480 (discriminator 4) net/ipv6/ip6_input.c:119 (discriminator 4) ./include/linux/netfilter.h:318 (discriminator 4) ./include/linux/netfilter.h:312 (discriminator 4) net/ipv6/ip6_input.c:351 (discriminator 4))
[  656.587792][    C3]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[  656.587794][    C3]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  656.587795][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  656.587797][    C3]  ? lock_unpin_lock (kernel/locking/lockdep.c:5684 (discriminator 6) kernel/locking/lockdep.c:5997 (discriminator 6))
[  656.587798][    C3]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6665 (discriminator 2))
[  656.587800][    C3]  __netif_receive_skb_one_core (net/core/dev.c:6203)
[  656.587802][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  656.587803][    C3]  ? __netif_receive_skb_list_core (net/core/dev.c:6249 (discriminator 2))
[  656.587805][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  656.587807][    C3]  process_backlog (net/core/dev.c:6667)
[  656.587810][    C3]  __napi_poll (net/core/dev.c:7726)
[  656.587812][    C3]  net_rx_action (net/core/dev.c:7789 net/core/dev.c:7946)
[  656.587815][    C3]  ? __napi_poll (./include/net/gro.h:507)
[  656.587817][    C3]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  656.587820][    C3]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[  656.587822][    C3]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[  656.587824][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  656.587825][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  656.587827][    C3]  handle_softirqs (kernel/softirq.c:622)
[  656.587829][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  656.587831][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  656.587833][    C3]  do_softirq (kernel/softirq.c:523 (discriminator 19) kernel/softirq.c:510 (discriminator 19))
[  656.587834][    C3]  </IRQ>
[  656.587835][    C3]  <TASK>
[  656.587836][    C3]  ? __dev_queue_xmit (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:909 (discriminator 2) net/core/dev.c:4906 (discriminator 2))
[  656.587837][    C3]  __local_bh_enable_ip (kernel/softirq.c:450)
[  656.587839][    C3]  __dev_queue_xmit (./include/linux/bottom_half.h:33 (discriminator 2) ./include/linux/rcupdate.h:912 (discriminator 2) net/core/dev.c:4906 (discriminator 2))
[  656.587841][    C3]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[  656.587845][    C3]  ? _copy_from_iter_flushcache (./include/linux/iov_iter.h:112)
[  656.587846][    C3]  ? ref_tracker_alloc (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:252 ./include/linux/refcount.h:283 ./include/linux/refcount.h:366 ./include/linux/refcount.h:383 lib/ref_tracker.c:265)
[  656.587849][    C3]  ? netdev_core_pick_tx (net/core/dev.c:4732)
[  656.587852][    C3]  ? packet_release (net/packet/af_packet.c:3171)
[  656.587855][    C3]  packet_snd (net/packet/af_packet.c:3082)
[  656.587858][    C3]  ? tpacket_snd (net/packet/af_packet.c:2685)
[  656.587859][    C3]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[  656.587863][    C3]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[  656.587865][    C3]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[  656.587867][    C3]  __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[  656.587868][    C3]  ? __ia32_sys_getpeername (net/socket.c:2219)
[  656.587871][    C3]  ? sock_ioctl (net/socket.c:1434)
[  656.587874][    C3]  ? __sys_setsockopt (net/socket.c:2406)
[  656.587876][    C3]  __x64_sys_sendto (net/socket.c:2272 net/socket.c:2268 net/socket.c:2268)
[  656.587878][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  656.587881][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  656.587883][    C3]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[  656.587884][    C3]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  656.587886][    C3]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[  656.587888][    C3]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[  656.587889][    C3]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  656.587891][    C3] RIP: 0033:0x7f3a91c6808e
[  656.587893][    C3] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[  656.587895][    C3] RSP: 002b:00007fff0e59d590 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  656.587898][    C3] RAX: ffffffffffffffda RBX: 00005650e9303b52 RCX: 00007f3a91c6808e
[  656.587899][    C3] RDX: 000000000000008e RSI: 00005650e9303b52 RDI: 0000000000000005
[  656.587900][    C3] RBP: 00007fff0e59d5a0 R08: 00007fff0e59d5f0 R09: 0000000000000014
[  656.587901][    C3] R10: 0000000000000000 R11: 0000000000000202 R12: 00005650e9303830


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_read_lock_bh