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ubifs: Check for name being NULL while mounting

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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: 1e51764a3c ("UBIFS: add new flash file system")
Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2018-09-03 23:06:23 +02:00
parent ae596de1a0
commit 37f31b6ca4
1 changed files with 3 additions and 0 deletions
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3
fs/ubifs/super.c
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@ -1954,6 +1954,9 @@ static struct ubi_volume_desc *open_ubi(const char *name, int mode)
int dev, vol;
char *endptr;
if (!name || !*name)
return ERR_PTR(-EINVAL);
/* First, try to open using the device node path method */
ubi = ubi_open_volume_path(name, mode);
if (!IS_ERR(ubi))