kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 15992 Comm: syz-executor1 Not tainted 4.15.0-rc8+ #196 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:strlen+0x1f/0xa0 lib/string.c:479 RSP: 0018:ffff8801d49df760 EFLAGS: 00010286 RAX: 00000000000000f4 RBX: ffff8801cd913700 RCX: 000000000000001e RDX: dffffc0000000000 RSI: ffffc90002530000 RDI: 00000000000000f4 RBP: ffff8801d49df778 R08: ffffffff84b08640 R09: 0000000000000004 IPv4: Oversized IP packet from 127.0.0.1 R10: ffff8801d49df920 R11: 0000000000000005 R12: ffff8801d49df898 R13: 00000000000000f4 R14: 0000000000000040 R15: 1ffff1003a93bef7 FS: 00007f50eaf51700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000001d63f7003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strlen include/linux/string.h:266 [inline] netlink_ack+0x120/0xa10 net/netlink/af_netlink.c:2357 IPv4: Oversized IP packet from 127.0.0.1 netlink_rcv_skb+0x2d1/0x400 net/netlink/af_netlink.c:2448 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 IPv4: Oversized IP packet from 127.0.0.1 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2020 __sys_sendmsg+0xe5/0x210 net/socket.c:2054 SYSC_sendmsg net/socket.c:2065 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2061 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452e99 RSP: 002b:00007f50eaf50c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452e99 RDX: 0000000000000000 RSI: 0000000020f1efc8 RDI: 000000000000001a RBP: 00000000000005b3 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6968 R13: 00000000ffffffff R14: 00007f50eaf516d4 R15: 0000000000000002 Code: 37 ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 f9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 f8 48 89 e5 41 54 53 48 83 ec 08 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 04 84 d2 75 4b 80 38 00 RIP: strlen+0x1f/0xa0 lib/string.c:479 RSP: ffff8801d49df760 ---[ end trace c6ec26a72b07db30 ]---