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: 9847 Comm: syz-executor3 Not tainted 4.16.0-rc2+ #322
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ipt_do_table+0x12ee/0x1950 net/ipv4/netfilter/ip_tables.c:334
RSP: 0018:ffff8801b017e6b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801b323f908 RCX: ffffffff84b795fd
RDX: 000000000000036d RSI: 0000000000000000 RDI: ffff8801b323f71a
RBP: ffff8801b017e8b8 R08: ffff8801b017e9b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8801b323f6c0 R15: ffff8801b017e830
FS:  00007f89665db700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc21000 CR3: 00000001b1f7d005 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 iptable_filter_hook+0x65/0x80 net/ipv4/netfilter/iptable_filter.c:41
 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline]
 nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483
 nf_hook include/linux/netfilter.h:243 [inline]
 NF_HOOK include/linux/netfilter.h:286 [inline]
 ip_local_deliver+0x445/0x6e0 net/ipv4/ip_input.c:257
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0xa36/0x2040 net/ipv4/ip_input.c:397
 NF_HOOK include/linux/netfilter.h:288 [inline]
 ip_rcv+0xc5a/0x1840 net/ipv4/ip_input.c:493
 __netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4554
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4619
 netif_receive_skb_internal+0x10b/0x670 net/core/dev.c:4693
 netif_receive_skb+0xae/0x390 net/core/dev.c:4717
 tun_rx_batched.isra.52+0x5ee/0x870 drivers/net/tun.c:1555
 tun_get_user+0x25a5/0x3810 drivers/net/tun.c:1956
 tun_chr_write_iter+0xbd/0x1c0 drivers/net/tun.c:1984
 call_write_iter include/linux/fs.h:1781 [inline]
 do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653
 do_iter_write+0x154/0x540 fs/read_write.c:932
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453c81
RSP: 002b:00007f89665daba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 0000000000453c81
RDX: 0000000000000001 RSI: 00007f89665dabf0 RDI: 0000000000000012
RBP: 0000000020000000 R08: 0000000000000012 R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000610 R14: 00000000006f9220 R15: 0000000000000000
Code: 46 52 02 75 41 e8 d3 75 b9 fc 8b 85 80 fe ff ff 8d 70 01 89 b5 00 ff ff ff 48 8b b5 88 fe ff ff 4c 8d 24 c6 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 e8 01 00 00 8b 85 00 ff ff ff 4d 89 34 24 
RIP: ipt_do_table+0x12ee/0x1950 net/ipv4/netfilter/ip_tables.c:334 RSP: ffff8801b017e6b0
---[ end trace 34951e5005c5d76b ]---