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: 0 PID: 2920 Comm: syzkaller278140 Not tainted 4.13.0-rc4+ #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d2604340 task.stack: ffff8801d22d0000
RIP: 0010:fib_dump_info+0x3aa/0x13b0 net/ipv4/fib_semantics.c:1315
RSP: 0018:ffff8801d22d7068 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 00000000000000fe RCX: 0000000000000000
RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030
RBP: ffff8801d22d72c0 R08: ffffed003a28b859 R09: ffffed003a28b859
R10: 0000000000000001 R11: ffffed003a28b858 R12: ffff8801d145c2b5
R13: 00000000000000ff R14: ffff8801d145c2a4 R15: ffff8801d4f00680
FS:  0000000001bce880(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f68fdb CR3: 00000001d6a21000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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: 0033:0x43fcd9
RSP: 002b:00007fff70a420a8 EFLAGS: 00000203 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcd9
RDX: 0000000000000025 RSI: 0000000020f68fdb RDI: 0000000000000003
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401640
R13: 00000000004016d0 R14: 0000000000000000 R15: 0000000000000000
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:1315 RSP: ffff8801d22d7068
---[ end trace 4f5289f2f859db70 ]---