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:[] [] __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: [] list_del+0xd/0x70 lib/list_debug.c:77 [] xfrm_state_walk_done+0x6e/0xa0 net/xfrm/xfrm_state.c:1675 [] xfrm_dump_sa_done+0x73/0xa0 net/xfrm/xfrm_user.c:913 [] netlink_dump+0x871/0xb40 net/netlink/af_netlink.c:2202 [] __netlink_dump_start+0x52e/0x7c0 net/netlink/af_netlink.c:2267 [] netlink_dump_start include/linux/netlink.h:175 [inline] [] xfrm_user_rcv_msg+0x5bd/0x6b0 net/xfrm/xfrm_user.c:2512 [] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349 [] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533 [] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline] [] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293 [] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:635 [] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962 [] __sys_sendmsg+0xd3/0x190 net/socket.c:1996 [] SYSC_sendmsg net/socket.c:2007 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2003 [] 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 [] __list_del_entry+0x86/0x1d0 lib/list_debug.c:57 RSP ---[ end trace 6ff451d48fa509e1 ]---