======================================
| [   13.005189][   T38] br1: port 5(w3) entered forwarding state
| [   13.234252][    C0] ------------[ cut here ]------------
| [   13.234469][    C0] WARNING: ./include/linux/skbuff.h:3239 at __udp6_lib_err_encap+0x614/0x950, CPU#0: ksoftirqd/0/14
| [   13.234799][    C0] Modules linked in: macvlan 8021q vxlan ip6_udp_tunnel udp_tunnel bridge stp llc vrf veth
[   13.235398][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.235560][    C0] RIP: 0010:__udp6_lib_err_encap (./include/linux/skbuff.h:3239 (discriminator 3) ./include/linux/skbuff.h:3235 (discriminator 3) net/ipv6/udp.c:652 (discriminator 3))
[   13.235743][    C0] Code: 08 84 d2 0f 85 4f 02 00 00 44 8b 4b 28 e9 a9 fe ff ff 4c 8b 6c 24 20 4c 8b 7c 24 28 45 31 e4 4c 8b 74 24 30 e9 d7 fd ff ff 90 <0f> 0b 90 48 29 c5 48 89 e8 48 81 fd ff ff 00 00 0f 86 ff fa ff ff
All code
========
   0:	08 84 d2 0f 85 4f 02 	or     %al,0x24f850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	44 8b 4b 28          	mov    0x28(%rbx),%r9d
   d:	e9 a9 fe ff ff       	jmp    0xfffffffffffffebb
  12:	4c 8b 6c 24 20       	mov    0x20(%rsp),%r13
  17:	4c 8b 7c 24 28       	mov    0x28(%rsp),%r15
  1c:	45 31 e4             	xor    %r12d,%r12d
  1f:	4c 8b 74 24 30       	mov    0x30(%rsp),%r14
  24:	e9 d7 fd ff ff       	jmp    0xfffffffffffffe00
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 29 c5             	sub    %rax,%rbp
  30:	48 89 e8             	mov    %rbp,%rax
  33:	48 81 fd ff ff 00 00 	cmp    $0xffff,%rbp
  3a:	0f 86 ff fa ff ff    	jbe    0xfffffffffffffb3f

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 29 c5             	sub    %rax,%rbp
   6:	48 89 e8             	mov    %rbp,%rax
   9:	48 81 fd ff ff 00 00 	cmp    $0xffff,%rbp
  10:	0f 86 ff fa ff ff    	jbe    0xfffffffffffffb15
[   13.236223][    C0] RSP: 0018:ffa00000000e74b8 EFLAGS: 00010293
[   13.236390][    C0] RAX: ff110000090e5c40 RBX: ff1100000da1de00 RCX: ff110000090e5cb0
[   13.236581][    C0] RDX: ff110000090e5c80 RSI: ff110000090e5c88 RDI: fffffffffffffff8
[   13.236780][    C0] RBP: ff110000090e5c88 R08: 1fe2200001b43bd9 R09: ff1100000da1de00
[   13.236987][    C0] R10: ffffffffa2335c00 R11: 0000000000000003 R12: 0000000000000000
[   13.237181][    C0] R13: ff1100000da1deb2 R14: ff1100000da1dec0 R15: ff1100000da1deb4
[   13.237373][    C0] FS:  0000000000000000(0000) GS:ff11000094bab000(0000) knlGS:0000000000000000
[   13.237598][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.237767][    C0] CR2: 00007fc4bd228574 CR3: 000000002993a002 CR4: 0000000000771ef0
[   13.237959][    C0] PKRU: 55555554
[   13.238060][    C0] Call Trace:
[   13.238157][    C0]  <TASK>
[   13.238225][    C0]  ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 (discriminator 2) arch/x86/kernel/kvmclock.c:81 (discriminator 2) arch/x86/kernel/kvmclock.c:87 (discriminator 2))
[   13.238356][    C0]  ? ktime_get (kernel/time/timekeeping.c:299 kernel/time/timekeeping.c:449 kernel/time/timekeeping.c:967)
[   13.238486][    C0]  udpv6_err (net/ipv6/udp.c:714)
[   13.238585][    C0]  ? mark_usage (kernel/locking/lockdep.c:4674 (discriminator 1))
[   13.238717][    C0]  ? __udp6_lib_err_encap (net/ipv6/udp.c:695)
[   13.238848][    C0]  icmpv6_notify (net/ipv6/icmp.c:1087)
[   13.238983][    C0]  ? icmpv6_param_prob_reason (net/ipv6/icmp.c:1039)
[   13.239113][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[   13.239241][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[   13.239370][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[   13.239501][    C0]  icmpv6_rcv (net/ipv6/icmp.c:1230)
[   13.239645][    C0]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:480)
[   13.239784][    C0]  ip6_input_finish (net/ipv6/ip6_input.c:532)
[   13.239917][    C0]  ip6_input (./include/linux/rcupdate.h:867 net/ipv6/ip6_input.c:543)
[   13.240022][    C0]  ? ip6_input_finish (net/ipv6/ip6_input.c:536)
[   13.240153][    C0]  ? ip6_rcv_core (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/ipv6/ip6_input.c:328 (discriminator 2))
[   13.240281][    C0]  ? __asan_memset (mm/kasan/shadow.c:84 (discriminator 2))
[   13.240416][    C0]  ? ip6_rcv_core (./include/net/sock.h:2995 net/ipv6/ip6_input.c:331)
[   13.240553][    C0]  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))
[   13.240654][    C0]  ? ip6_rcv_core (net/ipv6/ip6_input.c:345)
[   13.240784][    C0]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 3) kernel/locking/lockdep.c:3821 (discriminator 3) kernel/locking/lockdep.c:3876 (discriminator 3))
[   13.240913][    C0]  ? kasan_save_stack (mm/kasan/common.c:59)
[   13.241045][    C0]  ? kasan_save_stack (mm/kasan/common.c:58)
[   13.241178][    C0]  ? mark_usage (kernel/locking/lockdep.c:4674 (discriminator 1))
[   13.241310][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   13.241442][    C0]  ? ns_tree_node_add (./include/linux/rbtree.h:105 ./include/linux/rbtree.h:406 kernel/nstree.c:121)
[   13.241579][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[   13.241717][    C0]  __netif_receive_skb_one_core (net/core/dev.c:6202)
[   13.241879][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[   13.242014][    C0]  ? __netif_receive_skb_list_core (net/core/dev.c:6202)
[   13.242180][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   13.242316][    C0]  process_backlog (./include/linux/rcupdate.h:867 net/core/dev.c:6674)
[   13.242450][    C0]  __napi_poll (net/core/dev.c:7737)
[   13.242549][    C0]  net_rx_action (net/core/dev.c:7800 net/core/dev.c:7957)
[   13.242690][    C0]  ? __napi_poll (net/core/dev.c:7919)
[   13.242823][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[   13.242962][    C0]  ? trace_sched_exit_tp (./include/trace/events/sched.h:886 (discriminator 24))
[   13.243101][    C0]  ? __schedule (kernel/sched/core.c:7012)
[   13.243233][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   13.243365][    C0]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[   13.243495][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[   13.243634][    C0]  ? _local_bh_enable (kernel/softirq.c:580)
[   13.243768][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   13.243898][    C0]  run_ksoftirqd (kernel/softirq.c:479 kernel/softirq.c:1077 kernel/softirq.c:1068)
[   13.244035][    C0]  smpboot_thread_fn (kernel/smpboot.c:160)
[   13.244165][    C0]  ? sort_range (kernel/smpboot.c:103)
[   13.244262][    C0]  kthread (kernel/kthread.c:436)
[   13.244362][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 24))
[   13.244523][    C0]  ? kthread_affine_node (kernel/kthread.c:381)
[   13.244657][    C0]  ret_from_fork (arch/x86/kernel/process.c:164)
[   13.244792][    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   13.244953][    C0]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 (discriminator 1) arch/x86/kernel/process_64.c:377 (discriminator 1) arch/x86/kernel/process_64.c:665 (discriminator 1))
[   13.245086][    C0]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
__udp6_lib_err_encap:udpv6_err:icmpv6_notify:icmpv6_rcv:ip6_protocol_deliver_rcu