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kernel BUG at net/key/af_key.c:2067!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4862 Comm: syz-executor0 Not tainted 4.13.0-rc4-next-20170811 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff880055732800 task.stack: ffff88006ceb0000
RIP: 0010:pfkey_xfrm_policy2msg+0x1cc6/0x2330 net/key/af_key.c:2067
RSP: 0018:ffff88006ceb74b0 EFLAGS: 00010216
RAX: 0000000000010000 RBX: ffff88003d3058ac RCX: ffffc90000e41000
RDX: 0000000000000425 RSI: ffffffff843f7e86 RDI: ffff88003d30575c
RBP: ffff88006ceb7588 R08: 0000000000000001 R09: ffff88003a5de480
R10: 000000000000001b R11: ffffed00074bbcaa R12: ffff88003d305778
R13: 0000000000000001 R14: 0000000000000008 R15: ffff88003d305680
FS:  00007f8e09edf700(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002038d00f CR3: 000000006d2bf000 CR4: 00000000000006e0
DR0: 0000000020001000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 dump_sp+0x14f/0x500 net/key/af_key.c:2668
 xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1015
 pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2691
 pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299
 pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2718
 pfkey_process+0x606/0x710 net/key/af_key.c:2808
 pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3644
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 sock_write_iter+0x31a/0x5d0 net/socket.c:912
 call_write_iter include/linux/fs.h:1742 [inline]
 new_sync_write fs/read_write.c:457 [inline]
 __vfs_write+0x684/0x970 fs/read_write.c:470
 vfs_write+0x189/0x510 fs/read_write.c:518
 SYSC_write fs/read_write.c:565 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:557
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x446739
RSP: 002b:00007f8e09edec08 EFLAGS: 00000292 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000016 RCX: 0000000000446739
RDX: 0000000000000010 RSI: 0000000020000ff0 RDI: 0000000000000016
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8e09edf9c0 R15: 00007f8e09edf700
Code: ff ff ff 10 00 00 00 e9 2a e4 ff ff e8 84 ee 2d fd 48 8b 85 70 ff ff ff be 01 00 00 00 66 89 70 04 e9 73 f4 ff ff e8 6a ee 2d fd <0f> 0b e8 f3 ee 61 fd e9 13 ff ff ff 48 89 df e8 86 ef 61 fd e9 
RIP: pfkey_xfrm_policy2msg+0x1cc6/0x2330 net/key/af_key.c:2067 RSP: ffff88006ceb74b0
---[ end trace c4eea90739e6f2ed ]---