======================================
| [   48.465320][  T428] br2: port 2(vx100) entered forwarding state
| [   48.699593][    C3] ------------[ cut here ]------------
| [   48.699985][    C3] kernel BUG at net/core/skbuff.c:3505!
| [   48.700198][    C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   48.700609][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 48.700941][ C3] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.701098][ C3] 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
[   48.701603][    C3] RSP: 0018:ffffc9000024f740 EFLAGS: 00010206
[   48.701787][    C3] RAX: 0000000000003a6a RBX: 0000000000000008 RCX: 1ffff11000be5f11
[   48.702002][    C3] RDX: 00000000000000aa RSI: dffffc0000000000 RDI: ffff888005f2f888
[   48.702218][    C3] RBP: 0000000000003a6a R08: 0000000000000008 R09: ffffed100046cda9
[   48.702431][    C3] R10: ffff8880068fe988 R11: ffff888005f2f780 R12: 0000000000000008
[   48.702640][    C3] R13: 0000000000000000 R14: ffffc9000024f800 R15: ffff8880068fe988
[   48.702850][    C3] FS:  0000000000000000(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   48.703099][    C3] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.703277][    C3] CR2: 00007f39d756b270 CR3: 000000001c31e006 CR4: 0000000000770ef0
[   48.703495][    C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   48.703705][    C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   48.703950][    C3] PKRU: 55555554
[   48.704064][    C3] Call Trace:
[   48.704172][    C3]  <TASK>
[ 48.704245][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 48.704357][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 48.704467][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.704613][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 48.704758][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.704908][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.705052][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 48.705192][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.705332][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 48.705473][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 48.705623][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 48.705769][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 48.705914][ C3] ? 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) 
[ 48.706065][ C3] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 48.706221][ C3] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 48.706396][ C3] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 48.706539][ C3] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 48.706681][ C3] ? ipv6_raw_deliver (net/ipv6/raw.c:142) 
[ 48.706828][ C3] icmpv6_rcv (./include/linux/skbuff.h:4567 net/ipv6/icmp.c:921) 
[ 48.706975][ C3] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438 (discriminator 5)) 
[ 48.707117][ C3] ? ip6_route_input (./include/linux/skbuff.h:1168 net/ipv6/route.c:2594) 
[ 48.707271][ C3] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484) 
[ 48.707415][ C3] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492) 
[ 48.707524][ C3] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491) 
[ 48.707672][ C3] ? ip6_rcv_core (./include/linux/skbuff.h:3181 net/ipv6/ip6_input.c:291) 
[ 48.707845][ C3] 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) 
[ 48.707958][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 48.708101][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 48.708243][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 48.708393][ C3] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304) 
[ 48.708545][ C3] __netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 48.708737][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 48.708912][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 48.709058][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 48.709199][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 48.709342][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 48.709487][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 48.709635][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 48.709779][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 48.709937][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 48.710084][ C3] ? __pfx___schedule (kernel/sched/core.c:6608) 
[ 48.710227][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 48.710389][ C3] __do_softirq (kernel/softirq.c:553) 
[ 48.710616][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:914) 
[ 48.710759][ C3] run_ksoftirqd (kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[ 48.710900][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 48.711043][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 48.711193][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 48.711419][ C3] kthread (kernel/kthread.c:388) 
[ 48.711531][ C3] ? __pfx_kthread (kernel/kthread.c:341) 
[ 48.711767][ C3] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 48.711935][ C3] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmpv6_rcv:ip6_protocol_deliver_rcu