kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 18669 Comm: syz-executor.4 Not tainted 4.4.174+ #4
task: ffff8801d2e817c0 task.stack: ffff880096a68000
RIP: 0010:[<ffffffff81b0af9c>]  [<ffffffff81b0af9c>] __list_del_entry_valid+0x7c/0x1a0 lib/list_debug.c:51
RSP: 0018:ffff880096a6f5d8  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8800a5a20510
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8800a5a20518
RBP: ffff880096a6f5f0 R08: 0000000000000000 R09: ffff8801d2e820f8
R10: ffffffff839f68d0 R11: 0000000000000000 R12: ffff8800a5a20518
R13: ffff8801c0399e00 R14: ffff8800a5a204b9 R15: ffff8800a5a20538
FS:  00007f4fbc29d700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 00000001d123f000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffffffff82717d94 ffffffff8255c29c ffff8800a5a20510 ffff880096a6f628
 ffffffff8255c2a4 ffff8800a5a34400 ffff8800a5a20510 ffff8800b5417a00
 ffff8800a5a204b9 ffff8800a5a20538 ffff880096a6f648 ffffffff825784e3
Call Trace:
 [<ffffffff8255c2a4>] __list_del_entry include/linux/list.h:116 [inline]
 [<ffffffff8255c2a4>] list_del include/linux/list.h:124 [inline]
 [<ffffffff8255c2a4>] xfrm_state_walk_done+0x84/0x1e0 net/xfrm/xfrm_state.c:1687
 [<ffffffff825784e3>] xfrm_dump_sa_done+0x73/0xa0 net/xfrm/xfrm_user.c:914
 [<ffffffff822e784b>] netlink_dump+0x76b/0xad0 net/netlink/af_netlink.c:2214
 [<ffffffff822e948a>] __netlink_dump_start+0x4ca/0x750 net/netlink/af_netlink.c:2279
 [<ffffffff82578a66>] netlink_dump_start include/linux/netlink.h:175 [inline]
 [<ffffffff82578a66>] xfrm_user_rcv_msg+0x556/0x630 net/xfrm/xfrm_user.c:2550
 [<ffffffff822f06e4>] netlink_rcv_skb+0xd4/0x2e0 net/netlink/af_netlink.c:2361
 [<ffffffff82571210>] xfrm_netlink_rcv+0x70/0x90 net/xfrm/xfrm_user.c:2571
 [<ffffffff822ef137>] netlink_unicast_kernel net/netlink/af_netlink.c:1277 [inline]
 [<ffffffff822ef137>] netlink_unicast+0x4d7/0x700 net/netlink/af_netlink.c:1303
 [<ffffffff822efb86>] netlink_sendmsg+0x6b6/0xc80 net/netlink/af_netlink.c:1859
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff821dd18d>] SYSC_sendmsg net/socket.c:2020 [inline]
 [<ffffffff821dd18d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2016
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 00 ad de 4c 8b 01 49 39 c0 74 66 48 b8 00 02 00 00 00 00 ad de 48 39 c3 74 78 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 fb 00 00 00 48 8b 03 48 39 c8 75 74 49 8d 78 
RIP  [<ffffffff81b0af9c>] __list_del_entry_valid+0x7c/0x1a0 lib/list_debug.c:51
 RSP <ffff880096a6f5d8>
---[ end trace 2c3f6611de7f020a ]---