======================================
| [ 1390.500833][ T9234] br2: port 2(veth2.20) entered forwarding state
| [ 1392.802214][    C0] ------------[ cut here ]------------
| [ 1392.802648][ C0] WARNING: CPU: 0 PID: 14 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) 
| [ 1392.803431][    C0] Modules linked in: ip6_gre ip6_tunnel tunnel6 macvlan ip_gre gre sch_prio act_mirred cls_matchall sch_red sch_tbf vxlan ip6_udp_tunnel udp_tunnel dummy act_gact cls_flower sch_ingress bridge stp llc 8021q vrf veth
[ 1392.805141][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1392.805504][ C0] RIP: 0010:icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
[ 1392.805885][ C0] 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
[ 1392.806908][    C0] RSP: 0018:ffffc900000e74e8 EFLAGS: 00010286
[ 1392.807305][    C0] RAX: ffff8880159799c0 RBX: 1ffff9200001cea1 RCX: 0000000000000002
[ 1392.807738][    C0] RDX: 1ffff11002dcdbcb RSI: ffffffffb189e3c3 RDI: ffffc900000e759a
[ 1392.808175][    C0] RBP: ffff888016e6de00 R08: 0000000000000001 R09: ffff888015978340
[ 1392.808612][    C0] R10: ffffffffb28050d7 R11: ffff888016e6de58 R12: ffffffffb47e5b00
[ 1392.809067][    C0] R13: ffffc900000e7798 R14: ffff8880159784c0 R15: ffffc900000e7528
[ 1392.809491][    C0] FS:  0000000000000000(0000) GS:ffff8880828b1000(0000) knlGS:0000000000000000
[ 1392.809998][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1392.810355][    C0] CR2: 00007fca72533800 CR3: 0000000005dd8005 CR4: 0000000000772ef0
[ 1392.810799][    C0] PKRU: 55555554
[ 1392.811013][    C0] Call Trace:
[ 1392.811229][    C0]  <TASK>
[ 1392.811384][ C0] ? __pfx_icmp_route_lookup.constprop.0 (net/ipv4/icmp.c:480) 
[ 1392.811759][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1392.812055][ C0] ? __ip_options_echo (net/ipv4/ip_options.c:86) 
[ 1392.812338][ C0] ? __icmp_send (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/icmp.c:718) 
[ 1392.812629][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1392.812916][ C0] __icmp_send (net/ipv4/icmp.c:746) 
[ 1392.813228][ C0] ? ip_route_input_slow (net/ipv4/route.c:2423) 
[ 1392.813515][ C0] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 1392.813803][ C0] ? handle_softirqs (kernel/softirq.c:579) 
[ 1392.814096][ C0] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1392.814401][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1392.814706][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1392.814990][ C0] ? ip_error (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/route.c:1004) 
[ 1392.815207][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1392.815504][ C0] ip_error (./include/net/icmp.h:44 net/ipv4/route.c:1007) 
[ 1392.815730][ C0] ? __pfx_ip_error (net/ipv4/route.c:933) 
[ 1392.816020][ C0] ? ip_rcv_finish_core (net/ipv4/ip_input.c:371) 
[ 1392.816307][ C0] ? 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) 
[ 1392.816524][ C0] 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) 
[ 1392.816745][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 1392.817027][ C0] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 1392.817319][ C0] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 1392.817617][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1392.817919][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 1392.818222][ C0] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 1392.818527][ C0] __netif_receive_skb_one_core (net/core/dev.c:5979 (discriminator 4)) 
[ 1392.818910][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5972) 
[ 1392.819289][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1392.819603][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 1392.819905][ C0] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 1392.820209][ C0] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6445) 
[ 1392.820512][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1392.820816][ C0] __napi_poll.constprop.0 (net/core/dev.c:7483) 
[ 1392.821101][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1392.821386][ C0] net_rx_action (net/core/dev.c:7546 net/core/dev.c:7673) 
[ 1392.821681][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1392.821966][ C0] ? __pfx_net_rx_action (net/core/dev.c:7635) 
[ 1392.822253][ C0] ? trace_sched_exit_tp (./include/trace/events/sched.h:888 (discriminator 21)) 
[ 1392.822541][ C0] ? __schedule (kernel/sched/core.c:6663) 
[ 1392.822848][ C0] ? __pfx___schedule (kernel/sched/core.c:6663) 
[ 1392.823150][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 1392.823435][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 1392.823724][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 1392.824006][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1392.824297][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1392.824589][ C0] kthread (kernel/kthread.c:464) 
[ 1392.824808][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1392.825088][ C0] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1392.825374][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1392.825663][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1392.825945][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1392.826235][ C0] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1392.826519][ C0] ? __pfx_kthread (kernel/kthread.c:413) 


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