======================================
| [    3.378343] ip6_tunnel: gt6 xmit: Local address not yet configured!
| [    6.258389] ------------[ cut here ]------------
| [    6.258527] kernel BUG at net/core/skbuff.c:3505!
| [    6.258562] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[    6.258644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    6.258706] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 6.258749] Code: 89 5c 24 04 44 89 d9 44 89 ff 44 89 ea ff d0 0f 1f 00 44 8b 5c 24 04 41 89 c7 eb b6 ff d0 0f 1f 00 41 89 c1 e9 71 fd ff ff 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
All code
========
   0:	89 5c 24 04          	mov    %ebx,0x4(%rsp)
   4:	44 89 d9             	mov    %r11d,%ecx
   7:	44 89 ff             	mov    %r15d,%edi
   a:	44 89 ea             	mov    %r13d,%edx
   d:	ff d0                	call   *%rax
   f:	0f 1f 00             	nopl   (%rax)
  12:	44 8b 5c 24 04       	mov    0x4(%rsp),%r11d
  17:	41 89 c7             	mov    %eax,%r15d
  1a:	eb b6                	jmp    0xffffffffffffffd2
  1c:	ff d0                	call   *%rax
  1e:	0f 1f 00             	nopl   (%rax)
  21:	41 89 c1             	mov    %eax,%r9d
  24:	e9 71 fd ff ff       	jmp    0xfffffffffffffd9a
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  33:	00 00 00 00 
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 00 
   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
[    6.258850] RSP: 0018:ffffaf6a4008bc38 EFLAGS: 00010206
[    6.258883] RAX: 000000000000009a RBX: 0000000000000008 RCX: ffff90cb01b10d00
[    6.258929] RDX: ffff90cb026ad540 RSI: 0000000000000100 RDI: ffff90cb026ad440
[    6.258970] RBP: ffffaf6a4008bc90 R08: ffffaf6a4008bc90 R09: 00000000e7e30301
[    6.259016] R10: 0000000000000008 R11: ffff90cb01b10d00 R12: ffff90cb02b78000
[    6.259057] R13: 0000000000000008 R14: 0000000000000000 R15: 00000000e7e30301
[    6.259099] FS:  0000000000000000(0000) GS:ffff90cb3ec00000(0000) knlGS:0000000000000000
[    6.259145] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    6.259184] CR2: 000000000041aad0 CR3: 0000000001da0001 CR4: 0000000000770ef0
[    6.259226] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    6.259271] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    6.259311] PKRU: 55555554
[    6.259325] Call Trace:
[    6.259342]  <TASK>
[    6.259359] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[    6.259389] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[    6.259415] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[    6.259441] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[    6.259467] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[    6.259494] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[    6.259519] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[    6.259545] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    6.259573] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[    6.259598] ? __skb_checksum (./include/net/checksum.h:121 (discriminator 1) net/core/skbuff.c:3439 (discriminator 1)) 
[    6.259625] __skb_checksum_complete (./arch/x86/include/asm/checksum_64.h:170 ./arch/x86/include/asm/checksum_64.h:180 net/core/skbuff.c:3643) 
[    6.259657] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[    6.259690] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[    6.259717] rawv6_rcv (net/ipv6/raw.c:355 net/ipv6/raw.c:416 net/ipv6/raw.c:379) 
[    6.259745] raw6_local_deliver (net/ipv6/raw.c:157 net/ipv6/raw.c:206) 
[    6.259770] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:387) 
[    6.259804] ip6_input_finish (./include/linux/rcupdate.h:782 net/ipv6/ip6_input.c:484) 
[    6.259829] __netif_receive_skb_one_core (net/core/dev.c:5613) 
[    6.259863] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) 
[    6.259888] __napi_poll (net/core/dev.c:6703) 
[    6.259915] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) 
[    6.259940] __do_softirq (kernel/softirq.c:553) 
[    6.259967] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[    6.260002] run_ksoftirqd (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:410 kernel/softirq.c:922 kernel/softirq.c:913) 
[    6.260029] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[    6.260055] kthread (kernel/kthread.c:388) 
[    6.260081] ? __pfx_kthread (kernel/kthread.c:341) 
[    6.260101] ret_from_fork (arch/x86/kernel/process.c:147) 
[    6.260127] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:rawv6_rcv:raw6_local_deliver