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: 8723 Comm: syz-executor7 Not tainted 4.4.113-ge70c132 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d50517c0 task.stack: ffff8801d4e90000
RIP: 0010:[<ffffffff81d62986>]  [<ffffffff81d62986>] __list_del_entry+0x86/0x1d0 lib/list_debug.c:57
RSP: 0018:ffff8801d4e975a8  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801cdb41e90
RDX: 0000000000000000 RSI: ffff8801d5052080 RDI: ffff8801cdb41e98
RBP: ffff8801d4e975c0 R08: 0000000000000001 R09: ffffffff85133c20
R10: 0000000000000001 R11: 1ffff1003a9d2e84 R12: 0000000000000000
R13: ffff8801cdb41e39 R14: ffff8801cdb41eb8 R15: 00000000ffffffde
FS:  00007f77d13ff700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc22000 CR3: 00000001c66d4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801cdb41eb8 ffff8801cdb41e90 ffff8801ced719c0 ffff8801d4e975d8
 ffffffff81d62add ffff8801cdb41e90 ffff8801d4e975f8 ffffffff832ae63e
 ffff8800aa41c400 ffff8801cdb41e90 ffff8801d4e97618 ffffffff832cdb93
Call Trace:
 [<ffffffff81d62add>] list_del+0xd/0x70 lib/list_debug.c:77
 [<ffffffff832ae63e>] xfrm_state_walk_done+0x6e/0xa0 net/xfrm/xfrm_state.c:1675
 [<ffffffff832cdb93>] xfrm_dump_sa_done+0x73/0xa0 net/xfrm/xfrm_user.c:913
 [<ffffffff82f7eae1>] netlink_dump+0x871/0xb40 net/netlink/af_netlink.c:2202
 [<ffffffff82f832ce>] __netlink_dump_start+0x52e/0x7c0 net/netlink/af_netlink.c:2267
 [<ffffffff832ce17d>] netlink_dump_start include/linux/netlink.h:175 [inline]
 [<ffffffff832ce17d>] xfrm_user_rcv_msg+0x5bd/0x6b0 net/xfrm/xfrm_user.c:2512
 [<ffffffff82f889be>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca50f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f87542>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f87542>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f88068>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea0aa>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea0aa>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debc81>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dedcd3>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82deddbd>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82deddbd>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: c4 0f 84 94 00 00 00 48 b8 00 02 00 00 00 00 ad de 48 39 c3 0f 84 a5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 e8 00 00 00 4c 8b 03 49 39 c8 0f 85 9b 00 00 
RIP  [<ffffffff81d62986>] __list_del_entry+0x86/0x1d0 lib/list_debug.c:57
 RSP <ffff8801d4e975a8>
---[ end trace 6ff451d48fa509e1 ]---