ubifs: Check for name being NULL while mounting
authorRichard Weinberger <richard@nod.at>
Mon, 3 Sep 2018 21:06:23 +0000 (23:06 +0200)
committerRichard Weinberger <richard@nod.at>
Thu, 20 Sep 2018 19:37:07 +0000 (21:37 +0200)
commit37f31b6ca4311b94d985fb398a72e5399ad57925
tree9d7931dccf8426d2d9e0d4910db908b717316cb3
parentae596de1a0c8c2c924dc99d23c026259372ab234
ubifs: Check for name being NULL while mounting

The requested device name can be NULL or an empty string.
Check for that and refuse to continue. UBIFS has to do this manually
since we cannot use mount_bdev(), which checks for this condition.

Fixes: 1e51764a3c2ac ("UBIFS: add new flash file system")
Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com
Signed-off-by: Richard Weinberger <richard@nod.at>
fs/ubifs/super.c