======================================
| [  410.679660][    C3]  #1: ffffffff9357de40 (rcu_read_lock){....}-{1:3}, at: ip6_input (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:840 (discriminator 2) net/ipv6/ip6_input.c:544 (discriminator 2))
| [  410.679924][    C3]  #2: ff11000010f2af68 (&vxlan->hash_lock){+.-.}-{3:3}, at: vxlan_snoop (./include/linux/spinlock.h:342 drivers/net/vxlan/vxlan_core.c:1487) vxlan
| [  410.680252][    C3]
| [  410.680252][    C3] stack backtrace:
[  410.680438][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  410.680440][    C3] Call Trace:
[  410.680442][    C3]  <IRQ>
[  410.680443][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  410.680449][    C3]  lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6876)
[  410.680455][    C3] vxlan_fdb_create (drivers/net/vxlan/vxlan_core.c:872 (discriminator 8)) vxlan
[  410.680460][    C3]  ? vxlan_find_mac_rcu (./include/linux/rhashtable.h:648 (discriminator 8) ./include/linux/rhashtable.h:673 (discriminator 8) drivers/net/vxlan/vxlan_core.c:396 (discriminator 8)) vxlan
[  410.680466][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  410.680470][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  410.680473][    C3]  ? vxlan_open (drivers/net/vxlan/vxlan_core.c:3030) vxlan
[  410.680477][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  410.680482][    C3] vxlan_fdb_update (drivers/net/vxlan/vxlan_core.c:1095 drivers/net/vxlan/vxlan_core.c:1138) vxlan
[  410.680489][    C3]  ? vxlan_fdb_create (./arch/x86/include/asm/bitops.h:202 (discriminator 1)) vxlan
[  410.680492][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  410.680494][    C3]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[  410.680498][    C3] vxlan_snoop (drivers/net/vxlan/vxlan_core.c:1491) vxlan
[  410.680506][    C3] vxlan_rcv (drivers/net/vxlan/vxlan_core.c:1634 (discriminator 1) drivers/net/vxlan/vxlan_core.c:1772 (discriminator 1)) vxlan
[  410.680515][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[  410.680519][    C3]  ? __udp6_lib_lookup (net/ipv6/udp.c:392)
[  410.680526][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  410.680527][    C3]  ? ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:498 (discriminator 54))
[  410.680530][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[  410.680534][    C3]  ? udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[  410.680537][    C3]  udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[  410.680540][    C3]  udp6_unicast_rcv_skb (net/ipv6/udp.c:1029)
[  410.680544][    C3]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[  410.680550][    C3]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[  410.680553][    C3]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[  410.680555][    C3]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[  410.680558][    C3]  ? ip6_rcv_core (./include/linux/rcupdate.h:873 net/ipv6/ip6_input.c:328)
[  410.680562][    C3]  ipv6_rcv (./include/net/dst.h:480 (discriminator 4) net/ipv6/ip6_input.c:119 (discriminator 4) ./include/linux/netfilter.h:325 (discriminator 4) ./include/linux/netfilter.h:319 (discriminator 4) net/ipv6/ip6_input.c:351 (discriminator 4))
[  410.680564][    C3]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[  410.680568][    C3]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  410.680570][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  410.680574][    C3]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6667 (discriminator 2))
[  410.680576][    C3]  __netif_receive_skb_one_core (net/core/dev.c:6228)
[  410.680578][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  410.680580][    C3]  ? __netif_receive_skb_list_core (net/core/dev.c:6274 (discriminator 2))
[  410.680583][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  410.680589][    C3]  process_backlog (net/core/dev.c:6669)
[  410.680593][    C3]  __napi_poll (net/core/dev.c:7728)
[  410.680596][    C3]  net_rx_action (net/core/dev.c:7791 net/core/dev.c:7948)
[  410.680601][    C3]  ? __napi_poll (./include/net/gro.h:507)
[  410.680603][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  410.680608][    C3]  ? sched_balance_softirq (kernel/sched/sched.h:1691 (discriminator 6) kernel/sched/sched.h:1999 (discriminator 6) kernel/sched/sched.h:2032 (discriminator 6) kernel/sched/fair.c:11243 (discriminator 6) kernel/sched/fair.c:14513 (discriminator 6))
[  410.680614][    C3]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[  410.680618][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  410.680621][    C3]  handle_softirqs (kernel/softirq.c:622)
[  410.680626][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  410.680633][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  410.680635][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[  410.680637][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[  410.680641][    C3]  </IRQ>
[  410.680641][    C3]  <TASK>
[  410.680643][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[  410.680645][    C3] RIP: 0010:finish_task_switch.isra.0 (./include/linux/blkdev.h:1227 (discriminator 1) kernel/sched/core.c:5375 (discriminator 1))
[  410.680649][    C3] Code: 03 0f 8e 84 06 00 00 c7 83 40 0d 00 00 00 00 00 00 48 8d 7b 48 e8 89 56 4a 02 e8 c4 23 34 00 fb 48 b8 00 00 00 00 00 fc ff df <49> 8d 7c 24 2c 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07
All code
========
   0:	03 0f                	add    (%rdi),%ecx
   2:	8e 84 06 00 00 c7 83 	mov    -0x7c390000(%rsi,%rax,1),%es
   9:	40 0d 00 00 00 00    	rex or $0x0,%eax
   f:	00 00                	add    %al,(%rax)
  11:	48 8d 7b 48          	lea    0x48(%rbx),%rdi
  15:	e8 89 56 4a 02       	call   0x24a56a3
  1a:	e8 c4 23 34 00       	call   0x3423e3
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df 
  2a:*	49 8d 7c 24 2c       	lea    0x2c(%r12),%rdi		<-- trapping instruction
  2f:	48 89 fa             	mov    %rdi,%rdx
  32:	48 c1 ea 03          	shr    $0x3,%rdx
  36:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  3a:	48 89 f8             	mov    %rdi,%rax
  3d:	83 e0 07             	and    $0x7,%eax

Code starting with the faulting instruction
===========================================
   0:	49 8d 7c 24 2c       	lea    0x2c(%r12),%rdi
   5:	48 89 fa             	mov    %rdi,%rdx
   8:	48 c1 ea 03          	shr    $0x3,%rdx
   c:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  10:	48 89 f8             	mov    %rdi,%rax
  13:	83 e0 07             	and    $0x7,%eax
[  410.680651][    C3] RSP: 0018:ffa0000000167d50 EFLAGS: 00000286
[  410.680653][    C3] RAX: dffffc0000000000 RBX: ff110000353b7840 RCX: ffffffff90283b7c
[  410.680654][    C3] RDX: ff11000001bd8040 RSI: ffffffff93016f14 RDI: ffffffff92a7a8e0
[  410.680655][    C3] RBP: ffa0000000167d90 R08: 0000000000000000 R09: 0000000000000000
[  410.680656][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: ff11000001bd8040
[  410.680657][    C3] R13: ff1100000c6d0040 R14: 0000000000000000 R15: ff110000353b8580
[  410.680660][    C3]  ? finish_task_switch.isra.0 (kernel/sched/sched.h:1673 kernel/sched/core.c:5241 kernel/sched/core.c:5359)
[  410.680664][    C3]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[  410.680669][    C3]  __schedule (kernel/sched/core.c:5513 kernel/sched/core.c:7234)
[  410.680675][    C3]  ? io_schedule_timeout (kernel/sched/core.c:8123 (discriminator 1))
[  410.680677][    C3]  ? default_idle_call (kernel/sched/idle.c:129)
[  410.680679][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[  410.680682][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  410.680685][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  410.680690][    C3]  schedule_idle (kernel/sched/core.c:7352)
[  410.680692][    C3]  cpu_startup_entry (kernel/sched/idle.c:454)
[  410.680695][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  410.680697][    C3]  ? set_cpu_sibling_map (arch/x86/kernel/smpboot.c:733 (discriminator 4))


Finger prints:
vxlan_fdb_create:vxlan_fdb_update:vxlan_snoop:vxlan_rcv:udpv6_queue_rcv_one_skb