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: 20463 Comm: syz-executor6 Not tainted 4.14.0-rc4+ #81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d8d22000 task.stack: ffff8801ce8a0000
RIP: 0010:ip6_setup_cork+0x274/0x15c0 net/ipv6/ip6_output.c:1168
RSP: 0018:ffff8801ce8a7550 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8801ce8a7748 RCX: 0000000000000010
RDX: 0000000000000002 RSI: ffffffff842a2ee9 RDI: 0000000000000014
RBP: ffff8801ce8a7620 R08: ffff8801d88d5700 R09: ffff8801ce8a7b10
R10: ffff8801d8d22000 R11: 0000000000000000 R12: ffff8801ce8a7ab0
R13: ffff8801ce8a7b10 R14: 0000000000000000 R15: ffff8801c6bb7840
FS:  00007f8caf387700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e0afe4 CR3: 00000001caa53000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6_make_skb+0x282/0x530 net/ipv6/ip6_output.c:1729
 udpv6_sendmsg+0x2769/0x3380 net/ipv6/udp.c:1340
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 SYSC_sendto+0x358/0x5a0 net/socket.c:1750
 SyS_sendto+0x40/0x50 net/socket.c:1718
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452719
RSP: 002b:00007f8caf386be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452719
RDX: 0000000000000001 RSI: 0000000020e17000 RDI: 0000000000000015
RBP: 0000000000000000 R08: 0000000020e0afe4 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f8caf3879c0 R15: 0000000000000000
Code: e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ea 0f 00 00 48 8d 79 04 48 b8 00 00 00 00 00 fc ff df 45 8b 74 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RIP: ip6_setup_cork+0x274/0x15c0 net/ipv6/ip6_output.c:1168 RSP: ffff8801ce8a7550
---[ end trace 0089d073ec1cbcb5 ]---
netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
sctp: [Deprecated]: syz-executor2 (pid 20478) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 20481 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 mm/slab_common.c:970