======================================
| [   88.477443][   T46] br1: port 4(veth2) entered forwarding state
| [   90.976215][    C1] ------------[ cut here ]------------
| [ 90.976723][ C1] WARNING: CPU: 1 PID: 0 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) 
| [   90.977571][    C1] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel bridge stp llc sch_ingress 8021q vrf veth
[   90.978867][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 90.979278][ C1] RIP: 0010:icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
[ 90.979692][ 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
[   90.980826][    C1] RSP: 0018:ffffc900001c0688 EFLAGS: 00010286
[   90.981303][    C1] RAX: ffff88800c08b9c0 RBX: 1ffff920000380d5 RCX: 0000000000000002
[   90.981786][    C1] RDX: 1ffff11001d46d9b RSI: ffffffffb589e3c3 RDI: ffffc900001c073a
[   90.982271][    C1] RBP: ffff88800ea36c80 R08: 0000000000000001 R09: ffff88800c08bb40
[   90.982747][    C1] R10: ffffffffb68050d7 R11: ffff88800ea36cd8 R12: ffffffffb87e5b00
[   90.983237][    C1] R13: ffffc900001c0938 R14: ffff88800c08bcc0 R15: ffffc900001c06c8
[   90.983719][    C1] FS:  0000000000000000(0000) GS:ffff88807e931000(0000) knlGS:0000000000000000
[   90.984292][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   90.984698][    C1] CR2: 00007f536f8a8000 CR3: 0000000029b36003 CR4: 0000000000772ef0
[   90.985179][    C1] PKRU: 55555554
[   90.985429][    C1] Call Trace:
[   90.985665][    C1]  <IRQ>
[ 90.985853][ C1] ? __pfx_icmp_route_lookup.constprop.0 (net/ipv4/icmp.c:480) 
[ 90.986270][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 90.986593][ C1] ? __ip_options_echo (net/ipv4/ip_options.c:86) 
[ 90.986908][ C1] ? __icmp_send (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/icmp.c:718) 
[ 90.987234][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 90.987553][ C1] __icmp_send (net/ipv4/icmp.c:746) 
[ 90.987879][ C1] ? ip_route_input_slow (net/ipv4/route.c:2423) 
[ 90.988210][ C1] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 90.988540][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 90.988856][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 90.989167][ C1] ? ip_error (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/route.c:1004) 
[ 90.989415][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 90.989744][ C1] ip_error (./include/net/icmp.h:44 net/ipv4/route.c:1007) 
[ 90.989980][ C1] ? __pfx_ip_error (net/ipv4/route.c:933) 
[ 90.990304][ C1] ? ip_rcv_finish_core (net/ipv4/ip_input.c:371) 
[ 90.990627][ 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) 
[ 90.990862][ 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) 
[ 90.991095][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 90.991420][ C1] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 90.991737][ C1] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 90.992060][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 90.992388][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 90.992701][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 90.993016][ C1] __netif_receive_skb_one_core (net/core/dev.c:5979 (discriminator 4)) 
[ 90.993417][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5972) 
[ 90.993808][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 90.994123][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 90.994444][ C1] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 90.994766][ C1] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6445) 
[ 90.995084][ C1] __napi_poll.constprop.0 (net/core/dev.c:7483) 
[ 90.995405][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 90.995720][ C1] net_rx_action (net/core/dev.c:7546 net/core/dev.c:7673) 
[ 90.996042][ C1] ? __pfx_net_rx_action (net/core/dev.c:7635) 
[ 90.996365][ C1] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 90.996694][ C1] ? _raw_spin_unlock_irq (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) 
[ 90.997013][ C1] ? tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 90.997340][ C1] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 90.997657][ C1] ? run_timer_softirq (kernel/time/timer.c:2404) 
[ 90.997975][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 90.998312][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 90.998644][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 90.998955][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 90.999205][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   90.999519][    C1]  </IRQ>
[   90.999680][    C1]  <TASK>
[ 90.999839][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 91.000249][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 91.000577][ C1] Code: 74 cf 00 e9 43 59 02 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 bf 27 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	74 cf                	je     0xffffffffffffffd1
   2:	00 e9                	add    %ch,%cl
   4:	43 59                	rex.XB pop %r9
   6:	02 00                	add    (%rax),%al
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 23 bf 27 00 	verw   0x27bf23(%rip)        # 0x27bf4b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   91.001716][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000242
[   91.002115][    C1] RAX: 00000000002976f7 RBX: 1ffff92000026fc1 RCX: ffffffffb4c193f9
[   91.002592][    C1] RDX: 0000000000000000 RSI: ffffffffb58b4dd5 RDI: ffffffffb5056320
[   91.003061][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c16702
[   91.003541][    C1] R10: ffff8880360b3813 R11: ffff8880360a8358 R12: 0000000000000000
[   91.004009][    C1] R13: ffff888001bf0040 R14: dffffc0000000000 R15: 0000000000000000
[ 91.004503][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 91.004899][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:749) 
[ 91.005135][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 91.005454][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 91.005773][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 91.006089][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 91.006417][ C1] do_idle (kernel/sched/idle.c:325) 
[ 91.006658][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 91.006974][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 91.007296][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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