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Commit 4c925efc authored by Richard Weinberger's avatar Richard Weinberger Committed by Greg Kroah-Hartman
Browse files

ubifs: Check for name being NULL while mounting 



commit 37f31b6c upstream.

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: 1e51764a ("UBIFS: add new flash file system")
Reported-by: default avatar <syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5656b735

fs/ubifs/super.c

+3 −0
Original line number Diff line number Diff line
@@ -1930,6 +1930,9 @@ 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))