======================================
| [   42.338234][   T49] br1: port 4(veth2) entered forwarding state
| [   45.991122][    C1] ------------[ cut here ]------------
| [   45.991504][    C1] kernel BUG at net/core/skbuff.c:3505!
| [   45.991771][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   45.992410][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 45.992882][ C1] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 45.993106][ C1] 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 17 a6 91 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 17 a6 91 fe       	call   0xfffffffffe91a656
  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 17 a6 91 fe       	call   0xfffffffffe91a62c
  15:	8b                   	.byte 0x8b
[   45.993849][    C1] RSP: 0018:ffffc9000019f740 EFLAGS: 00010202
[   45.994110][    C1] RAX: 000000000000cd6b RBX: 0000000000000008 RCX: 1ffff11000ff7259
[   45.994425][    C1] RDX: 00000000000000ce RSI: dffffc0000000000 RDI: ffff888007fb92c8
[   45.994744][    C1] RBP: 000000000000cd6b R08: 0000000000000008 R09: ffffed1000734989
[   45.995047][    C1] R10: ffff888008e38288 R11: ffff888007fb9000 R12: 0000000000000008
[   45.995358][    C1] R13: 0000000000000000 R14: ffffc9000019f800 R15: ffff888008e38288
[   45.995683][    C1] FS:  0000000000000000(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   45.996084][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   45.996371][    C1] CR2: 00007f59db777270 CR3: 000000002831e004 CR4: 0000000000770ef0
[   45.996728][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   45.997063][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   45.997389][    C1] PKRU: 55555554
[   45.997556][    C1] Call Trace:
[   45.997725][    C1]  <TASK>
[ 45.997849][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 45.998011][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 45.998167][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 45.998385][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 45.998585][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 45.998788][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 45.998998][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 45.999202][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 45.999410][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 45.999639][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 45.999874][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 46.000084][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 46.000303][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 46.000513][ C1] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 46.000734][ C1] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 46.001009][ C1] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 46.001237][ C1] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 46.001470][ C1] ? ipv6_raw_deliver (net/ipv6/raw.c:142) 
[ 46.001689][ C1] icmpv6_rcv (./include/linux/skbuff.h:4567 net/ipv6/icmp.c:921) 
[ 46.001911][ C1] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438 (discriminator 5)) 
[ 46.002144][ C1] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484) 
[ 46.002357][ C1] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492) 
[ 46.002520][ C1] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491) 
[ 46.002733][ C1] ? ip6_rcv_core (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/ipv6/ip6_input.c:287) 
[ 46.002959][ C1] ? ip6_rcv_core (./include/net/sock.h:2827 net/ipv6/ip6_input.c:290) 
[ 46.003180][ C1] ipv6_rcv (./include/net/dst.h:460 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310) 
[ 46.003354][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 46.003576][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 46.003799][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 46.004028][ C1] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 46.004242][ C1] __netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 46.004518][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 46.004789][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 46.005016][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 46.005226][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 46.005452][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 46.005674][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 46.005902][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 46.006120][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 46.006345][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 46.006554][ C1] ? __pfx___schedule (kernel/sched/core.c:6608) 
[ 46.006793][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 46.007152][ C1] __do_softirq (kernel/softirq.c:553) 
[ 46.007381][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:914) 
[ 46.007608][ C1] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 46.007828][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 46.008191][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 46.008407][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 46.008616][ C1] kthread (kernel/kthread.c:388) 
[ 46.008793][ C1] ? __pfx_kthread (kernel/kthread.c:341) 
[ 46.009021][ C1] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 46.009235][ C1] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmpv6_rcv:ip6_protocol_deliver_rcu