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: 2245 Comm: syz-executor927 Not tainted 4.4.153+ #92
task: ffff8800b0ab17c0 task.stack: ffff8801d79f0000
RIP: 0010:[<ffffffff8257b92f>]  [<ffffffff8257b92f>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP: 0010:[<ffffffff8257b92f>]  [<ffffffff8257b92f>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP: 0010:[<ffffffff8257b92f>]  [<ffffffff8257b92f>] xfrm6_policy_check include/net/xfrm.h:1086 [inline]
RIP: 0010:[<ffffffff8257b92f>]  [<ffffffff8257b92f>] udpv6_queue_rcv_skb+0x18f/0x1510 net/ipv6/udp.c:634
RSP: 0018:ffff8801d79f78d0  EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8800b0a98000 RCX: 0000000000000000
RDX: 000000000000000c RSI: ffffffff8257b916 RDI: 0000000000000060
RBP: ffff8801d79f7910 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8800b4f68280
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8800b4f682d8
FS:  0000000000b7f880(0063) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020184000 CR3: 00000000b5a28000 CR4: 00000000001606b0
Stack:
 00000001b0a98088 ffff8800b4f68280 ffff8800b0a98088 ffff8800b0a98000
 ffff8800b4f68280 dffffc0000000000 ffff8800b4f682d8 0000000000000000
 ffff8801d79f7980 ffffffff82154b3b ffff8800b0a98430 ffff8800b0a98188
Call Trace:
 [<ffffffff82154b3b>] sk_backlog_rcv include/net/sock.h:871 [inline]
 [<ffffffff82154b3b>] __release_sock net/core/sock.c:2023 [inline]
 [<ffffffff82154b3b>] release_sock+0x17b/0x500 net/core/sock.c:2473
 [<ffffffff82579087>] udpv6_sendmsg+0x917/0x24c0 net/ipv6/udp.c:1364
 [<ffffffff82412203>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82146f7b>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff82146f7b>] sock_sendmsg+0xbb/0x110 net/socket.c:648
 [<ffffffff8214b180>] SYSC_sendto net/socket.c:1678 [inline]
 [<ffffffff8214b180>] SyS_sendto+0x220/0x370 net/socket.c:1646
 [<ffffffff8267cca1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 74 24 58 41 f6 c6 01 0f 85 24 08 00 00 e8 2a 8a d7 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 d0 0e 00 00 41 f6 46 60 04 
RIP  [<ffffffff8257b92f>] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline]
RIP  [<ffffffff8257b92f>] xfrm_policy_check include/net/xfrm.h:1076 [inline]
RIP  [<ffffffff8257b92f>] xfrm6_policy_check include/net/xfrm.h:1086 [inline]
RIP  [<ffffffff8257b92f>] udpv6_queue_rcv_skb+0x18f/0x1510 net/ipv6/udp.c:634
 RSP <ffff8801d79f78d0>
---[ end trace 9315ffaea049a1a8 ]---