======================================
| [  413.072222][    C3]  #1: ffffffffb817dd40 (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))
| [  413.072488][    C3]  #2: ff11000013462f68 (&vxlan->hash_lock){+.-.}-{3:3}, at: vxlan_snoop (./include/linux/spinlock.h:342 drivers/net/vxlan/vxlan_core.c:1487) vxlan
| [  413.072801][    C3]
| [  413.072801][    C3] stack backtrace:
[  413.072996][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  413.072998][    C3] Call Trace:
[  413.073000][    C3]  <IRQ>
[  413.073002][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  413.073008][    C3]  lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6876)
[  413.073013][    C3] vxlan_fdb_create (drivers/net/vxlan/vxlan_core.c:872 (discriminator 8)) vxlan
[  413.073019][    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
[  413.073025][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  413.073029][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  413.073032][    C3]  ? vxlan_open (drivers/net/vxlan/vxlan_core.c:3030) vxlan
[  413.073037][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  413.073042][    C3] vxlan_fdb_update (drivers/net/vxlan/vxlan_core.c:1095 drivers/net/vxlan/vxlan_core.c:1138) vxlan
[  413.073048][    C3]  ? vxlan_fdb_create (./arch/x86/include/asm/bitops.h:202 (discriminator 1)) vxlan
[  413.073052][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  413.073054][    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)
[  413.073061][    C3] vxlan_snoop (drivers/net/vxlan/vxlan_core.c:1491) vxlan
[  413.073069][    C3] vxlan_rcv (drivers/net/vxlan/vxlan_core.c:1634 (discriminator 1) drivers/net/vxlan/vxlan_core.c:1772 (discriminator 1)) vxlan
[  413.073078][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[  413.073082][    C3]  ? __udp6_lib_lookup (net/ipv6/udp.c:392)
[  413.073088][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  413.073092][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[  413.073096][    C3]  ? udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[  413.073099][    C3]  udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[  413.073102][    C3]  udp6_unicast_rcv_skb (net/ipv6/udp.c:1029)
[  413.073106][    C3]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[  413.073113][    C3]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[  413.073115][    C3]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[  413.073117][    C3]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[  413.073121][    C3]  ? ip6_rcv_core (./include/linux/rcupdate.h:873 net/ipv6/ip6_input.c:328)
[  413.073125][    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))
[  413.073128][    C3]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[  413.073131][    C3]  ? mark_usage (kernel/locking/lockdep.c:4674)
[  413.073133][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  413.073137][    C3]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6673 (discriminator 2))
[  413.073139][    C3]  __netif_receive_skb_one_core (net/core/dev.c:6234)
[  413.073141][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  413.073144][    C3]  ? __netif_receive_skb_list_core (net/core/dev.c:6280 (discriminator 2))
[  413.073146][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  413.073152][    C3]  process_backlog (net/core/dev.c:6675)
[  413.073157][    C3]  __napi_poll (net/core/dev.c:7734)
[  413.073160][    C3]  net_rx_action (net/core/dev.c:7797 net/core/dev.c:7954)
[  413.073165][    C3]  ? __napi_poll (./include/net/gro.h:507)
[  413.073169][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  413.073175][    C3]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[  413.073178][    C3]  ? run_timer_softirq (kernel/time/timer.c:2387 kernel/time/timer.c:2395 kernel/time/timer.c:2403)
[  413.073180][    C3]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[  413.073184][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  413.073187][    C3]  handle_softirqs (kernel/softirq.c:622)
[  413.073193][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  413.073197][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  413.073200][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[  413.073202][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[  413.073205][    C3]  </IRQ>
[  413.073205][    C3]  <TASK>
[  413.073206][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  413.073208][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[  413.073210][    C3] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:63)
[  413.073213][    C3] Code: 48 8b 3d 44 91 fb 01 e8 1f 00 00 00 48 2b 05 08 42 9b 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d 63 5d 19 00 fb f4 <c3> 0f 1f 40 d6 48 83 ec 20 8b 17 49 89 f8 83 e2 fe 41 89 d2 0f 01
All code
========
   0:	48 8b 3d 44 91 fb 01 	mov    0x1fb9144(%rip),%rdi        # 0x1fb914b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 08 42 9b 00 	sub    0x9b4208(%rip),%rax        # 0x9b421b
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d 63 5d 19 00 	verw   0x195d63(%rip)        # 0x195d8b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  2f:	48 83 ec 20          	sub    $0x20,%rsp
  33:	8b 17                	mov    (%rdi),%edx
  35:	49 89 f8             	mov    %rdi,%r8
  38:	83 e2 fe             	and    $0xfffffffe,%edx
  3b:	41 89 d2             	mov    %edx,%r10d
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	0f 1f 40 d6          	nopl   -0x2a(%rax)
   5:	48 83 ec 20          	sub    $0x20,%rsp
   9:	8b 17                	mov    (%rdi),%edx
   b:	49 89 f8             	mov    %rdi,%r8
   e:	83 e2 fe             	and    $0xfffffffe,%edx
  11:	41 89 d2             	mov    %edx,%r10d
  14:	0f                   	.byte 0xf
  15:	01                   	.byte 0x1
[  413.073215][    C3] RSP: 0018:ffa0000000167e00 EFLAGS: 00000282
[  413.073217][    C3] RAX: 0000000000e89709 RBX: ff11000001bd8040 RCX: ffffffffb4ee3c17
[  413.073219][    C3] RDX: ff11000001bd8040 RSI: ffffffffb7c17342 RDI: ffffffffb767a960
[  413.073220][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  413.073220][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: 1ff400000002cfc3
[  413.073221][    C3] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  413.073225][    C3]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  413.073230][    C3]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:768)
[  413.073232][    C3]  default_idle_call (kernel/sched/idle.c:122)
[  413.073233][    C3]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  413.073236][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[  413.073238][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  413.073242][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  413.073245][    C3]  do_idle (kernel/sched/idle.c:355)
[  413.073247][    C3]  cpu_startup_entry (kernel/sched/idle.c:454)
[  413.073250][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  413.073252][    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