======================================
| [   17.013542][    C0]  #1: ffffffffb157de40 (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))
| [   17.014057][    C0]  #2: ff1100000c2b2f68 (&vxlan->hash_lock){+.-.}-{3:3}, at: vxlan_snoop (./include/linux/spinlock.h:342 drivers/net/vxlan/vxlan_core.c:1487) vxlan
| [   17.014515][    C0]
| [   17.014515][    C0] stack backtrace:
[   17.014724][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.014726][    C0] Call Trace:
[   17.014727][    C0]  <IRQ>
[   17.014729][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   17.014735][    C0]  lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6876)
[   17.014740][    C0] vxlan_fdb_create (drivers/net/vxlan/vxlan_core.c:872 (discriminator 8)) vxlan
[   17.014745][    C0]  ? 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
[   17.014751][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   17.014755][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.014758][    C0]  ? vxlan_open (drivers/net/vxlan/vxlan_core.c:3030) vxlan
[   17.014762][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   17.014767][    C0] vxlan_fdb_update (drivers/net/vxlan/vxlan_core.c:1095 drivers/net/vxlan/vxlan_core.c:1138) vxlan
[   17.014773][    C0]  ? vxlan_fdb_create (./arch/x86/include/asm/bitops.h:202 (discriminator 1)) vxlan
[   17.014776][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   17.014779][    C0]  ? 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)
[   17.014783][    C0] vxlan_snoop (drivers/net/vxlan/vxlan_core.c:1491) vxlan
[   17.014791][    C0] vxlan_rcv (drivers/net/vxlan/vxlan_core.c:1634 (discriminator 1) drivers/net/vxlan/vxlan_core.c:1772 (discriminator 1)) vxlan
[   17.014799][    C0]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[   17.014803][    C0]  ? __udp6_lib_lookup (net/ipv6/udp.c:392)
[   17.014810][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   17.014813][    C0]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[   17.014817][    C0]  ? udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[   17.014819][    C0]  udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[   17.014823][    C0]  udp6_unicast_rcv_skb (net/ipv6/udp.c:1029)
[   17.014826][    C0]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[   17.014833][    C0]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[   17.014835][    C0]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[   17.014837][    C0]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[   17.014840][    C0]  ? ip6_rcv_core (./include/linux/rcupdate.h:873 net/ipv6/ip6_input.c:328)
[   17.014844][    C0]  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))
[   17.014846][    C0]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[   17.014850][    C0]  ? mark_usage (kernel/locking/lockdep.c:4674)
[   17.014852][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.014856][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6667 (discriminator 2))
[   17.014857][    C0]  __netif_receive_skb_one_core (net/core/dev.c:6228)
[   17.014859][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   17.014862][    C0]  ? __netif_receive_skb_list_core (net/core/dev.c:6274 (discriminator 2))
[   17.014864][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   17.014870][    C0]  process_backlog (net/core/dev.c:6669)
[   17.014874][    C0]  __napi_poll (net/core/dev.c:7728)
[   17.014877][    C0]  net_rx_action (net/core/dev.c:7791 net/core/dev.c:7948)
[   17.014882][    C0]  ? __napi_poll (./include/net/gro.h:507)
[   17.014886][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.014892][    C0]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   17.014895][    C0]  ? run_timer_softirq (kernel/time/timer.c:2387 kernel/time/timer.c:2395 kernel/time/timer.c:2403)
[   17.014897][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:372)
[   17.014900][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   17.014903][    C0]  handle_softirqs (kernel/softirq.c:622)
[   17.014909][    C0]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   17.014913][    C0]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   17.014915][    C0]  irq_exit_rcu (kernel/softirq.c:752)
[   17.014917][    C0]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[   17.014920][    C0]  </IRQ>
[   17.014921][    C0]  <TASK>
[   17.014921][    C0]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   17.014924][    C0]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[   17.014926][    C0] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:63)
[   17.014929][    C0] Code: 48 8b 3d 44 a1 fb 01 e8 1f 00 00 00 48 2b 05 08 62 9b 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d 43 7d 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 a1 fb 01 	mov    0x1fba144(%rip),%rdi        # 0x1fba14b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 08 62 9b 00 	sub    0x9b6208(%rip),%rax        # 0x9b621b
  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 43 7d 19 00 	verw   0x197d43(%rip)        # 0x197d6b
  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
[   17.014931][    C0] RSP: 0018:ffffffffb1207e18 EFLAGS: 00000292
[   17.014933][    C0] RAX: 00000000000b7729 RBX: ffffffffb121c600 RCX: ffffffffae2e3d17
[   17.014934][    C0] RDX: ffffffffb121c600 RSI: ffffffffb1016f14 RDI: ffffffffb0a7a8e0
[   17.014935][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   17.014936][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: 1ffffffff6240fc6
[   17.014936][    C0] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000014770
[   17.014940][    C0]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   17.014945][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   17.014946][    C0]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:768)
[   17.014948][    C0]  default_idle_call (kernel/sched/idle.c:122)
[   17.014950][    C0]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   17.014952][    C0]  ? arch_cpu_idle_exit+0x40/0x40
[   17.014954][    C0]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   17.014958][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   17.014961][    C0]  do_idle (kernel/sched/idle.c:355)
[   17.014963][    C0]  cpu_startup_entry (kernel/sched/idle.c:454)
[   17.014965][    C0]  rest_init (init/main.c:717)
[   17.014968][    C0]  start_kernel (init/main.c:1175)
[   17.014976][    C0]  x86_64_start_reservations (arch/x86/kernel/head64.c:310)
[   17.014980][    C0]  x86_64_start_kernel (arch/x86/kernel/head64.c:291)


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