kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3811 Comm: syzkaller751192 Not tainted 4.4.115-g037d237 #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb1d9800 task.stack: ffff8800a9d70000
RIP: 0010:[<ffffffff831a9571>]  [<ffffffff831a9571>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP: 0010:[<ffffffff831a9571>]  [<ffffffff831a9571>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP: 0010:[<ffffffff831a9571>]  [<ffffffff831a9571>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
RIP: 0010:[<ffffffff831a9571>]  [<ffffffff831a9571>] udp_queue_rcv_skb+0x191/0x1560 net/ipv4/udp.c:1517
RSP: 0018:ffff8800a9d77928  EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8801d99b85c0 RCX: ffffffff831a9558
RDX: 000000000000000c RSI: ffff8801c8528a00 RDI: 0000000000000060
RBP: ffff8800a9d77968 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff100153aeef6 R12: ffff8801c8528a00
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801c8528a58
FS:  000000000106c880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002082dff0 CR3: 00000000aa5a8000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d99b8648 ffff880100000001 ffff8801d99b8648 dffffc0000000000
 ffff8801d99b85c0 0000000000000000 ffffed003b33713e ffff8801c8528a00
 ffff8800a9d779d8 ffffffff82df8b16 ffff8801d99b8748 ffff8801d99b8750
Call Trace:
 [<ffffffff82df8b16>] sk_backlog_rcv include/net/sock.h:871 [inline]
 [<ffffffff82df8b16>] __release_sock net/core/sock.c:2023 [inline]
 [<ffffffff82df8b16>] release_sock+0x176/0x510 net/core/sock.c:2473
 [<ffffffff831a2b84>] udp_sendmsg+0x15c4/0x1c30 net/ipv4/udp.c:1105
 [<ffffffff831d712c>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:755
 [<ffffffff82deb8ca>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82deb8ca>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82dec818>] SYSC_sendto+0x2c8/0x340 net/socket.c:1665
 [<ffffffff82deed10>] SyS_sendto+0x40/0x50 net/socket.c:1633
 [<ffffffff8377441f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 28 78 1b fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 9f 0b 00 00 41 f6 46 60 04 
RIP  [<ffffffff831a9571>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP  [<ffffffff831a9571>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP  [<ffffffff831a9571>] xfrm4_policy_check include/net/xfrm.h:1081 [inline]
RIP  [<ffffffff831a9571>] udp_queue_rcv_skb+0x191/0x1560 net/ipv4/udp.c:1517
 RSP <ffff8800a9d77928>
---[ end trace 826ec98b7cd69bca ]---
Kernel panic - not syncing: Fatal exception in interrupt
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..