======================================
| [   24.939547][   T37] br1: port 4(veth2) entered forwarding state
| [   27.498302][    C1] ------------[ cut here ]------------
| [ 27.498765][ C1] WARNING: CPU: 1 PID: 22 at ./include/linux/skbuff.h:1164 icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
| [   27.499536][    C1] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel bridge stp llc 8021q sch_ingress vrf veth
[   27.500718][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 27.501085][ C1] RIP: 0010:icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
[ 27.501455][ C1] Code: c1 ea 03 80 3c 02 00 0f 85 2c 05 00 00 48 8b 45 58 48 89 44 24 08 a8 01 0f 85 35 02 00 00 48 f7 44 24 08 fe ff ff ff 74 04 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 4c 89 da 48 c1 ea 03 80 3c
All code
========
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 2c 05 00 00    	jne    0x539
   d:	48 8b 45 58          	mov    0x58(%rbp),%rax
  11:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  16:	a8 01                	test   $0x1,%al
  18:	0f 85 35 02 00 00    	jne    0x253
  1e:	48 f7 44 24 08 fe ff 	testq  $0xfffffffffffffffe,0x8(%rsp)
  25:	ff ff 
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	4c 89 da             	mov    %r11,%rdx
  3a:	48 c1 ea 03          	shr    $0x3,%rdx
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	4c 89 da             	mov    %r11,%rdx
  10:	48 c1 ea 03          	shr    $0x3,%rdx
  14:	80                   	.byte 0x80
  15:	3c                   	.byte 0x3c
[   27.502518][    C1] RSP: 0018:ffffc900001974e8 EFLAGS: 00010286
[   27.502881][    C1] RAX: ffff888012b219c0 RBX: 1ffff92000032ea1 RCX: 0000000000000002
[   27.503316][    C1] RDX: 1ffff1100297320b RSI: ffffffffa7a9e3c3 RDI: ffffc9000019759a
[   27.503751][    C1] RBP: ffff888014b99000 R08: 0000000000000001 R09: ffff888012b21b40
[   27.504190][    C1] R10: ffffffffa8a050d7 R11: ffff888014b99058 R12: ffffffffaa9e5b00
[   27.504619][    C1] R13: ffffc90000197798 R14: ffff888012b21cc0 R15: ffffc90000197528
[   27.505075][    C1] FS:  0000000000000000(0000) GS:ffff88808c731000(0000) knlGS:0000000000000000
[   27.505567][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.505928][    C1] CR2: 00007f164bde2000 CR3: 000000000f336001 CR4: 0000000000772ef0
[   27.506351][    C1] PKRU: 55555554
[   27.506563][    C1] Call Trace:
[   27.506776][    C1]  <TASK>
[ 27.506942][ C1] ? __pfx_icmp_route_lookup.constprop.0 (net/ipv4/icmp.c:480) 
[ 27.507310][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.507591][ C1] ? __ip_options_echo (net/ipv4/ip_options.c:86) 
[ 27.507871][ C1] ? __icmp_send (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/icmp.c:718) 
[ 27.508155][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 27.508436][ C1] __icmp_send (net/ipv4/icmp.c:746) 
[ 27.508728][ C1] ? ip_route_input_slow (net/ipv4/route.c:2423) 
[ 27.509022][ C1] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 27.509322][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.509606][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 27.509886][ C1] ? ip_error (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/route.c:1004) 
[ 27.510103][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 27.510390][ C1] ip_error (./include/net/icmp.h:44 net/ipv4/route.c:1007) 
[ 27.510604][ C1] ? __pfx_ip_error (net/ipv4/route.c:933) 
[ 27.510891][ C1] ? ip_rcv_finish_core (net/ipv4/ip_input.c:371) 
[ 27.511194][ C1] ? ip_rcv (./include/net/dst.h:471 ./include/net/dst.h:469 net/ipv4/ip_input.c:454 ./include/linux/netfilter.h:317 ./include/linux/netfilter.h:311 net/ipv4/ip_input.c:574) 
[ 27.511404][ C1] ip_rcv (./include/net/dst.h:471 ./include/net/dst.h:469 net/ipv4/ip_input.c:454 ./include/linux/netfilter.h:317 ./include/linux/netfilter.h:311 net/ipv4/ip_input.c:574) 
[ 27.511614][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 27.511892][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 27.512190][ C1] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 27.512474][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.512758][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 27.513047][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 27.513335][ C1] __netif_receive_skb_one_core (net/core/dev.c:5979 (discriminator 4)) 
[ 27.513686][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5972) 
[ 27.514044][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.514323][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 27.514599][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 27.514882][ C1] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6445) 
[ 27.515172][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 27.515456][ C1] __napi_poll.constprop.0 (net/core/dev.c:7483) 
[ 27.515739][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.516030][ C1] net_rx_action (net/core/dev.c:7546 net/core/dev.c:7673) 
[ 27.516314][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.516598][ C1] ? __pfx_net_rx_action (net/core/dev.c:7635) 
[ 27.516877][ C1] ? trace_sched_exit_tp (./include/trace/events/sched.h:888 (discriminator 21)) 
[ 27.517166][ C1] ? __schedule (kernel/sched/core.c:6663) 
[ 27.517452][ C1] ? __pfx___schedule (kernel/sched/core.c:6663) 
[ 27.517749][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 27.518044][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 27.518325][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 27.518601][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 27.518885][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 27.519172][ C1] kthread (kernel/kthread.c:464) 
[ 27.519388][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 27.519668][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 27.519964][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 27.520245][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 27.520524][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 27.520807][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 27.521091][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
__icmp_send:ip_error:ip_rcv:__netif_receive_skb_one_core:process_backlog