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: 3336 Comm: syzkaller663590 Not tainted 4.4.105-gb5797f6 #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b81b0000 task.stack: ffff8801d57c8000
RIP: 0010:[<ffffffff83334bc1>]  [<ffffffff83334bc1>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP: 0010:[<ffffffff83334bc1>]  [<ffffffff83334bc1>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP: 0010:[<ffffffff83334bc1>]  [<ffffffff83334bc1>] xfrm6_policy_check include/net/xfrm.h:1086 [inline]
RIP: 0010:[<ffffffff83334bc1>]  [<ffffffff83334bc1>] udpv6_queue_rcv_skb+0x171/0x1360 net/ipv6/udp.c:634
RSP: 0018:ffff8801d57cf8c8  EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffff8801d55e8000 RCX: 000000000000000c
RDX: dffffc0000000000 RSI: ffff8800b88a6fc0 RDI: 0000000000000060
RBP: ffff8801d57cf908 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 1ffff1003aaf9eea R12: ffff8800b88a6fc0
R13: 0000000000000001 R14: ffffed003aabd086 R15: ffff8800b88a7018
FS:  0000000002466880(0063) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020cf6000 CR3: 00000001d44bf000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 00000001d55e8088 ffff8801d55e8000 ffff8801d55e8088 dffffc0000000000
 ffff8801d55e8000 0000000000000000 ffffed003aabd086 ffffffff85765280
 ffff8801d57cf980 ffffffff82da0c15 ffff8801d55e8188 ffff8801d55e8190
Call Trace:
 [<ffffffff82da0c15>] sk_backlog_rcv include/net/sock.h:871 [inline]
 [<ffffffff82da0c15>] __release_sock net/core/sock.c:2023 [inline]
 [<ffffffff82da0c15>] release_sock+0x165/0x500 net/core/sock.c:2473
 [<ffffffff83332501>] udpv6_sendmsg+0x8c1/0x2360 net/ipv6/udp.c:1364
 [<ffffffff8319024c>] inet_sendmsg+0x26c/0x430 net/ipv4/af_inet.c:755
 [<ffffffff82d94005>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82d94005>] sock_sendmsg+0xb5/0xf0 net/socket.c:635
 [<ffffffff82d94e47>] SYSC_sendto+0x267/0x300 net/socket.c:1665
 [<ffffffff82d97179>] SyS_sendto+0x9/0x10 net/socket.c:1633
 [<ffffffff8374ab36>] entry_SYSCALL_64_fastpath+0x16/0x76
Code: 85 a0 10 00 00 49 8b 44 24 58 a8 01 0f 85 04 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 83 e0 fe 48 8d 78 60 48 89 f9 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 01 0f 8e 73 0a 00 00 f6 40 60 04 
RIP  [<ffffffff83334bc1>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP  [<ffffffff83334bc1>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP  [<ffffffff83334bc1>] xfrm6_policy_check include/net/xfrm.h:1086 [inline]
RIP  [<ffffffff83334bc1>] udpv6_queue_rcv_skb+0x171/0x1360 net/ipv6/udp.c:634
 RSP <ffff8801d57cf8c8>
---[ end trace c3368fd087b9c424 ]---
Kernel panic - not syncing: Fatal exception in interrupt
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..