TCP: request_sock_TCP: Possible SYN flooding on port 20016. Sending cookies.  Check SNMP counters.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 9487 Comm: syz-executor1 Not tainted 4.13.0-rc4-next-20170811 #1
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=64 sclass=netlink_audit_socket pig=9516 comm=syz-executor4
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=64 sclass=netlink_audit_socket pig=9518 comm=syz-executor4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801bf56e280 task.stack: ffff8801d2610000
RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0 net/core/flow_dissector.c:445
RSP: 0018:ffff8801d2617340 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900043f5000
RDX: 0000000000000060 RSI: ffffffff83563983 RDI: 0000000000000300
RBP: ffff8801d2617870 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: ffffed003a4c2f1e R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff856dc080 R15: ffff8801c5ed0cc0
FS:  00007f01fe617700(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020008000 CR3: 00000001d56bd000 CR4: 00000000001406f0
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: ffff8801d2617340
---[ end trace 263dd6b848394d94 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..