======================================
| [   16.700212][    C3]  #1: ffffffff93d7de40 (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))
| [   16.700489][    C3]  #2: ff11000010b9af68 (&vxlan->hash_lock){+.-.}-{3:3}, at: vxlan_snoop (./include/linux/spinlock.h:342 drivers/net/vxlan/vxlan_core.c:1487) vxlan
| [   16.700805][    C3]
| [   16.700805][    C3] stack backtrace:
[   16.701002][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.701004][    C3] Call Trace:
[   16.701005][    C3]  <IRQ>
[   16.701007][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   16.701014][    C3]  lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6876)
[   16.701019][    C3] vxlan_fdb_create (drivers/net/vxlan/vxlan_core.c:872 (discriminator 8)) vxlan
[   16.701025][    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
[   16.701032][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   16.701036][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   16.701039][    C3]  ? vxlan_open (drivers/net/vxlan/vxlan_core.c:3030) vxlan
[   16.701043][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   16.701048][    C3] vxlan_fdb_update (drivers/net/vxlan/vxlan_core.c:1095 drivers/net/vxlan/vxlan_core.c:1138) vxlan
[   16.701059][    C3]  ? vxlan_fdb_create (./arch/x86/include/asm/bitops.h:202 (discriminator 1)) vxlan
[   16.701063][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   16.701066][    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)
[   16.701070][    C3] vxlan_snoop (drivers/net/vxlan/vxlan_core.c:1491) vxlan
[   16.701078][    C3] vxlan_rcv (drivers/net/vxlan/vxlan_core.c:1634 (discriminator 1) drivers/net/vxlan/vxlan_core.c:1772 (discriminator 1)) vxlan
[   16.701087][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[   16.701092][    C3]  ? __udp6_lib_lookup (net/ipv6/udp.c:392)
[   16.701099][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   16.701103][    C3]  ? encap_bypass_if_local (drivers/net/vxlan/vxlan_core.c:2353) vxlan
[   16.701107][    C3]  ? udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[   16.701110][    C3]  udpv6_queue_rcv_one_skb (net/ipv6/udp.c:842)
[   16.701114][    C3]  udp6_unicast_rcv_skb (net/ipv6/udp.c:1029)
[   16.701117][    C3]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[   16.701124][    C3]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[   16.701127][    C3]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[   16.701129][    C3]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[   16.701132][    C3]  ? ip6_rcv_core (./include/linux/rcupdate.h:873 net/ipv6/ip6_input.c:328)
[   16.701137][    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))
[   16.701139][    C3]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[   16.701143][    C3]  ? mark_usage (kernel/locking/lockdep.c:4674)
[   16.701146][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.701152][    C3]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6667 (discriminator 2))
[   16.701154][    C3]  __netif_receive_skb_one_core (net/core/dev.c:6228)
[   16.701157][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   16.701160][    C3]  ? __netif_receive_skb_list_core (net/core/dev.c:6274 (discriminator 2))
[   16.701162][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   16.701168][    C3]  process_backlog (net/core/dev.c:6669)
[   16.701173][    C3]  __napi_poll (net/core/dev.c:7728)
[   16.701176][    C3]  net_rx_action (net/core/dev.c:7791 net/core/dev.c:7948)
[   16.701181][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   16.701183][    C3]  ? __napi_poll (./include/net/gro.h:507)
[   16.701187][    C3]  ? trace_rcu_this_gp.isra.0 (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3) ./include/trace/events/rcu.h:107 (discriminator 3) kernel/rcu/tree.c:992 (discriminator 3))
[   16.701190][    C3]  ? trace_rcu_quiescent_state_report (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3) ./include/trace/events/rcu.h:368 (discriminator 3))
[   16.701196][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   16.701199][    C3]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   16.701200][    C3]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   16.701202][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   16.701205][    C3]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   16.701208][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   16.701211][    C3]  handle_softirqs (kernel/softirq.c:622)
[   16.701217][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   16.701221][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   16.701224][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[   16.701226][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1062 (discriminator 37) arch/x86/kernel/apic/apic.c:1062 (discriminator 37))
[   16.701228][    C3]  </IRQ>
[   16.701229][    C3]  <TASK>
[   16.701229][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   16.701231][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:674)
[   16.701234][    C3] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:63)
[   16.701236][    C3] 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
[   16.701238][    C3] RSP: 0018:ffa0000000167e00 EFLAGS: 00000282
[   16.701240][    C3] RAX: 00000000000cfa87 RBX: ff11000001bd8040 RCX: ffffffff90ae3d17
[   16.701242][    C3] RDX: ff11000001bd8040 RSI: ffffffff93816f14 RDI: ffffffff9327a8e0
[   16.701243][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   16.701244][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: 1ff400000002cfc3
[   16.701245][    C3] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   16.701248][    C3]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   16.701253][    C3]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:768)
[   16.701255][    C3]  default_idle_call (kernel/sched/idle.c:122)
[   16.701257][    C3]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   16.701260][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[   16.701263][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   16.701267][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   16.701270][    C3]  do_idle (kernel/sched/idle.c:355)
[   16.701272][    C3]  cpu_startup_entry (kernel/sched/idle.c:454)
[   16.701274][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   16.701277][    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