kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
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Modules linked in:
CPU: 1 PID: 6797 Comm: syz-executor1 Not tainted 4.13.0-rc4-next-20170811 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003ca58800 task.stack: ffff88003b360000
RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0 net/core/flow_dissector.c:445
RSP: 0018:ffff88003b3671d8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90000989000
RDX: 0000000000000060 RSI: ffffffff83563983 RDI: 0000000000000300
RBP: ffff88003b367708 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: ffffed000766cef1 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff856dc080 R15: ffff88003ac98700
FS:  00007f35a8835700(0000) GS:ffff88003fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c434f0f000 CR3: 000000003a18a000 CR4: 00000000000026e0
Call Trace:
 skb_flow_dissect_flow_keys include/linux/skbuff.h:1176 [inline]
 skb_get_poff+0x9a/0x1a0 net/core/flow_dissector.c:1079
 ______skb_get_pay_offset net/core/filter.c:114 [inline]
 __skb_get_pay_offset+0x15/0x20 net/core/filter.c:112
Code: 80 3c 02 00 44 89 6d 10 0f 85 44 2b 00 00 4d 8b 67 20 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 00 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 13 2b 00 00 4d 8b a4 24 00 03 00 00 4d 85 e4 
RIP: __skb_flow_dissect+0xdcd/0x3ae0 net/core/flow_dissector.c:445 RSP: ffff88003b3671d8
---[ end trace bf61fe2075e8f4bb ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..