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: 6115 Comm: syz-executor6 Not tainted 4.13.0-rc3+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d7ec8680 task.stack: ffff8801d9b70000
RIP: 0010:fib_dump_info+0x3aa/0x13b0 net/ipv4/fib_semantics.c:1314
RSP: 0018:ffff8801d9b77068 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 00000000000000fe RCX: ffffc90004f9b000
RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030
RBP: ffff8801d9b772c0 R08: ffffed003aebc041 R09: ffffed003aebc041
R10: 0000000000000001 R11: ffffed003aebc040 R12: ffff8801d75e01f5
R13: 00000000000000ff R14: ffff8801d75e01e4 R15: ffff8801d962bd40
FS:  00007f0d6c49a700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 00000001c4c61000 CR4: 00000000001406e0
Call Trace:
 inet_rtm_getroute+0xfb7/0x2d40 net/ipv4/route.c:2766
 rtnetlink_rcv_msg+0x5ea/0x840 net/core/rtnetlink.c:4217
 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2397
 rtnetlink_rcv+0x2a/0x40 net/core/rtnetlink.c:4223
 netlink_unicast_kernel net/netlink/af_netlink.c:1265 [inline]
 netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1291
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1854
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 sock_write_iter+0x31a/0x5d0 net/socket.c:898
 call_write_iter include/linux/fs.h:1743 [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: 0033:0x4512c9
RSP: 002b:00007f0d6c499c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004512c9
RDX: 0000000000000025 RSI: 0000000020002000 RDI: 0000000000000005
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b706a
R13: 00000000ffffffff R14: 0000000020002000 R15: 0000000000001000
Code: 0f b6 b5 e4 fd ff ff 48 8b 85 f0 fd ff ff 40 88 70 17 48 8b 45 28 48 8d 78 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e ba 0f 00 00 48 8b 45 28 44 
RIP: fib_dump_info+0x3aa/0x13b0 net/ipv4/fib_semantics.c:1314 RSP: ffff8801d9b77068
---[ end trace 7c561dfc5d5d2db3 ]---