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: 1 PID: 5913 Comm: syz-executor5 Not tainted 4.15.0-rc8+ #198
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip6_xmit+0xc16/0x2090 net/ipv6/ip6_output.c:264
RSP: 0018:ffff8801bbac69f8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8801d0743628 RCX: ffffffff84b52fed
RDX: 000000002000f185 RSI: ffffc900048e2000 RDI: 0000000100078c2d
RBP: ffff8801bbac6c68 R08: 0000000000000000 R09: 1ffff10037758d0d
R10: ffff8801bbac6830 R11: 0000000000000002 R12: 000000010007895d
R13: 0000000000000001 R14: 0000000000000040 R15: ffff8801c72cc57c
FS:  00007f1828fe4700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020aa2fc6 CR3: 00000001d8c4f002 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 inet6_csk_xmit+0x2fc/0x580 net/ipv6/inet6_connection_sock.c:139
 tcp_transmit_skb+0x1b1b/0x38c0 net/ipv4/tcp_output.c:1176
 tcp_send_syn_data net/ipv4/tcp_output.c:3457 [inline]
 tcp_connect+0x1edb/0x4090 net/ipv4/tcp_output.c:3496
 tcp_v4_connect+0x15ef/0x1e70 net/ipv4/tcp_ipv4.c:257
 __inet_stream_connect+0x2d4/0xf00 net/ipv4/af_inet.c:620
 tcp_sendmsg_fastopen net/ipv4/tcp.c:1168 [inline]
 tcp_sendmsg_locked+0x264e/0x3c70 net/ipv4/tcp.c:1214
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1463
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2020
 __sys_sendmsg+0xe5/0x210 net/socket.c:2054
 SYSC_sendmsg net/socket.c:2065 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2061
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452ee9
RSP: 002b:00007f1828fe3c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1828fe4700 RCX: 0000000000452ee9
RDX: 0000000020004000 RSI: 000000002088b000 RDI: 0000000000000013
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7cf R14: 00007f1828fe49c0 R15: 0000000000000000
Code: 4d 8b a4 24 18 01 00 00 4d 85 e4 74 67 e8 83 ef ba fc 49 8d bc 24 d0 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ce 10 00 00 48 8b 95 e8 fd ff ff 48 b8 00 00 
RIP: ip6_xmit+0xc16/0x2090 net/ipv6/ip6_output.c:264 RSP: ffff8801bbac69f8
---[ end trace 54d047e37559e716 ]---