======================================
| [   36.483928][  T321] br0: port 2(vx0) entered forwarding state
| [   39.075036][    C2] ------------[ cut here ]------------
| [   39.075271][    C2] kernel BUG at net/core/skbuff.c:3505!
| [   39.075423][    C2] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   39.075795][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 39.076091][ C2] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.076233][ C2] Code: 44 89 14 24 ff d0 0f 1f 00 4c 8b 44 24 08 44 8b 14 24 41 89 c1 eb a5 89 e8 e9 2d fe ff ff 41 ff d5 0f 1f 00 e9 1f fa ff ff 90 <0f> 0b 48 8b 7c 24 10 89 54 24 48 48 89 44 24 40 e8 e7 53 8d fe 8b
All code
========
   0:	44 89 14 24          	mov    %r10d,(%rsp)
   4:	ff d0                	call   *%rax
   6:	0f 1f 00             	nopl   (%rax)
   9:	4c 8b 44 24 08       	mov    0x8(%rsp),%r8
   e:	44 8b 14 24          	mov    (%rsp),%r10d
  12:	41 89 c1             	mov    %eax,%r9d
  15:	eb a5                	jmp    0xffffffffffffffbc
  17:	89 e8                	mov    %ebp,%eax
  19:	e9 2d fe ff ff       	jmp    0xfffffffffffffe4b
  1e:	41 ff d5             	call   *%r13
  21:	0f 1f 00             	nopl   (%rax)
  24:	e9 1f fa ff ff       	jmp    0xfffffffffffffa48
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
  31:	89 54 24 48          	mov    %edx,0x48(%rsp)
  35:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  3a:	e8 e7 53 8d fe       	call   0xfffffffffe8d5426
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
   7:	89 54 24 48          	mov    %edx,0x48(%rsp)
   b:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  10:	e8 e7 53 8d fe       	call   0xfffffffffe8d53fc
  15:	8b                   	.byte 0x8b
[   39.076707][    C2] RSP: 0018:ffffc900001f77c8 EFLAGS: 00010206
[   39.076882][    C2] RAX: 0000000000000141 RBX: 0000000000000008 RCX: 1ffff11000b47779
[   39.077081][    C2] RDX: 000000000000006a RSI: dffffc0000000000 RDI: ffff888005a3bbc8
[   39.077277][    C2] RBP: 0000000000000141 R08: 0000000000000008 R09: fffffbfff67ea5a2
[   39.077474][    C2] R10: ffffffffb3f52d17 R11: ffffc900001f7501 R12: 0000000000000008
[   39.077668][    C2] R13: 0000000000000000 R14: ffffc900001f7888 R15: ffff888006fbb248
[   39.077866][    C2] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[   39.078094][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.078260][    C2] CR2: 00007f924e7ca270 CR3: 00000000065ae006 CR4: 0000000000770ef0
[   39.078456][    C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   39.078650][    C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   39.078847][    C2] PKRU: 55555554
[   39.078946][    C2] Call Trace:
[   39.079045][    C2]  <TASK>
[ 39.079112][ C2] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 39.079215][ C2] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 39.079314][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.079445][ C2] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 39.079576][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.079705][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.079841][ C2] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 39.079971][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.080099][ C2] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 39.080230][ C2] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 39.080365][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.080495][ C2] ? __skb_checksum (net/core/skbuff.c:3441 (discriminator 4)) 
[ 39.080627][ C2] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 39.080767][ C2] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 39.080930][ C2] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 39.081061][ C2] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 39.081191][ C2] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) 
[ 39.081291][ C2] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) 
[ 39.081425][ C2] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 39.081556][ C2] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 39.081686][ C2] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 39.081817][ C2] ? ip_rcv_finish_core.constprop.0 (net/ipv4/ip_input.c:367) 
[ 39.081985][ C2] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 39.082082][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 39.082213][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 39.082344][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 39.082476][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 39.082607][ C2] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 39.082769][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 39.082930][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 39.083062][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 39.083193][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 39.083323][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 39.083454][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 39.083584][ C2] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 39.083716][ C2] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 39.083848][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 39.083978][ C2] ? __pfx___schedule (kernel/sched/core.c:6608) 
[ 39.084108][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 39.084243][ C2] __do_softirq (kernel/softirq.c:553) 
[ 39.084373][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:914) 
[ 39.084505][ C2] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 39.084635][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 39.084767][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 39.084897][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 39.085030][ C2] kthread (kernel/kthread.c:388) 
[ 39.085128][ C2] ? __pfx_kthread (kernel/kthread.c:341) 
[ 39.085259][ C2] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 39.085390][ C2] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu