kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 7782 Comm: syz-executor2 Not tainted 4.9.56-g5c73594 #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c7e1b000 task.stack: ffff8801c7e30000
RIP: 0010:[<ffffffff8341053c>]  [<ffffffff8341053c>] ip6_setup_cork+0x20c/0x1200 net/ipv6/ip6_output.c:1230
RSP: 0018:ffff8801c7e376d8  EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8801c7e378b8 RCX: ffffc9000217b000
RDX: 0000000000000002 RSI: 00000000024080c0 RDI: 0000000000000014
RBP: ffff8801c7e37740 R08: ffff8801ca0b9880 R09: ffff8801c7e37b70
R10: 0000000000000000 R11: 1ffff10038fc6efa R12: ffff8801c7e37ad0
R13: ffff8801c7e37b70 R14: 0000000000000000 R15: 0000000000000010
FS:  00007fa515b21700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 00000001c51d5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c7e37860 ffffffff833bff90 ffff8801d8475048 ffff8801d8475340
 ffff8801d8474e00 ffff8801c7e37a90 ffff8801ca0b9880 ffff8801c7e377f8
 ffff8801c7e37958 ffff8801c7e37a90 ffff8801c7e37838 ffff8801d8474e00
Call Trace:
 [<ffffffff834242b8>] ip6_make_skb+0x1b8/0x440 net/ipv6/ip6_output.c:1802
 [<ffffffff8348a21d>] udpv6_sendmsg+0x1b1d/0x2540 net/ipv6/udp.c:1240
 [<ffffffff832ebcdc>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753
 [<ffffffff82ed1b9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed1b9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed2af8>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82ed4fa0>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff838ad085>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 5d 0d 00 00 49 8d 7f 04 45 8b 74 24 04 48 b8 00 00 00 00 00 fc ff df 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  [<ffffffff8341053c>] ip6_setup_cork+0x20c/0x1200 net/ipv6/ip6_output.c:1230
 RSP <ffff8801c7e376d8>
9pnet_virtio: no channels available for device ./file0
---[ end trace 38e6ebcc09fe8d4e ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..