======================================
| [   27.811963][  T263] ip_gre: GRE over IPv4 tunneling driver
| [   28.197873][    C1] ------------[ cut here ]------------
| [   28.198140][    C1] kernel BUG at net/core/skbuff.c:3505!
| [   28.198311][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   28.198733][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   28.199069][    C1] Workqueue: mld mld_ifc_work
[ 28.199234][ C1] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.199395][ 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 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
[   28.199926][    C1] RSP: 0018:ffffc900001c8920 EFLAGS: 00010206
[   28.200116][    C1] RAX: 000000000000c2e5 RBX: 0000000000000008 RCX: 1ffff11000606f79
[   28.200340][    C1] RDX: 0000000000000072 RSI: dffffc0000000000 RDI: ffff888003037bc8
[   28.200564][    C1] RBP: 000000000000c2e5 R08: 0000000000000008 R09: fffffbfff70ea5a2
[   28.200791][    C1] R10: ffffffffb8752d17 R11: ffffffffb610dbc4 R12: 0000000000000008
[   28.201015][    C1] R13: 0000000000000000 R14: ffffc900001c89e0 R15: ffff888007b740c8
[   28.201250][    C1] FS:  0000000000000000(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   28.201516][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.201712][    C1] CR2: 00007f1f2f2e51b4 CR3: 000000002af32005 CR4: 0000000000770ef0
[   28.201935][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.202159][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.202392][    C1] PKRU: 55555554
[   28.202503][    C1] Call Trace:
[   28.202619][    C1]  <IRQ>
[ 28.202721][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 28.202849][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 28.202967][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.203119][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 28.203266][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.203417][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.203570][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 28.203724][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.203882][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 28.204035][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 28.204185][ C1] ? dst_init (net/core/dst.c:53) 
[ 28.204301][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 28.204456][ C1] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 28.204613][ C1] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 28.204807][ C1] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 28.204959][ C1] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 28.205107][ C1] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) 
[ 28.205223][ C1] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) 
[ 28.205375][ C1] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 28.205522][ C1] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 28.205667][ C1] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 28.205816][ C1] ? ip_rcv_finish_core.constprop.0 (net/ipv4/ip_input.c:367) 
[ 28.206005][ C1] 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) 
[ 28.206122][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 28.206271][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 28.206423][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 28.206571][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 28.206716][ C1] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 28.206895][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 28.207080][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 28.207319][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 28.207472][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 28.207624][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 28.207772][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 28.207924][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 28.208163][ C1] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) 
[ 28.208311][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 28.208460][ C1] __do_softirq (kernel/softirq.c:553) 
[ 28.208607][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 28.208752][ C1] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   28.208865][    C1]  </IRQ>
[   28.208946][    C1]  <TASK>
[ 28.209018][ C1] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 28.209258][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) 
[ 28.209401][ C1] __dev_queue_xmit (net/core/dev.c:4400) 
[ 28.209548][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 28.209693][ C1] ? eth_header (net/ethernet/eth.c:100) 
[ 28.209930][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 28.210080][ C1] ? neigh_resolve_output (./include/linux/netdevice.h:3226 net/core/neighbour.c:1558 net/core/neighbour.c:1543) 
[ 28.210229][ C1] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) 
[ 28.210380][ C1] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) 
[ 28.210729][ C1] ip6_output (./include/linux/netfilter.h:303 net/ipv6/ip6_output.c:243) 
[ 28.210839][ C1] ? __pfx_ip6_output (net/ipv6/ip6_output.c:230) 
[ 28.210982][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 28.211127][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 28.211272][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 28.211416][ C1] ? icmp6_dst_alloc (net/ipv6/route.c:3293) 
[ 28.211564][ C1] NF_HOOK.constprop.0 (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 ./include/linux/netfilter.h:238 ./include/linux/netfilter.h:312) 
[ 28.211714][ C1] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308) 
[ 28.211864][ C1] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3133) 
[ 28.212054][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 28.212234][ C1] ? icmp6_dst_alloc (net/ipv6/route.c:3293) 
[ 28.212376][ C1] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) 
[ 28.212524][ C1] mld_sendpack (net/ipv6/mcast.c:1822) 
[ 28.212689][ C1] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1779) 
[ 28.212835][ C1] ? mld_send_cr (net/ipv6/mcast.c:2096 (discriminator 11)) 
[ 28.212980][ C1] mld_ifc_work (net/ipv6/mcast.c:2652) 
[ 28.213124][ C1] process_one_work (kernel/workqueue.c:2633) 
[ 28.213361][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 28.213513][ C1] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 28.213662][ C1] ? assign_work (kernel/workqueue.c:1101) 
[ 28.213808][ C1] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 28.214041][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 28.214224][ C1] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 28.214373][ C1] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 28.214518][ C1] kthread (kernel/kthread.c:388) 
[ 28.214724][ C1] ? __pfx_kthread (kernel/kthread.c:341) 
[ 28.214871][ C1] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 28.215027][ C1] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu