commit 4a59c797a18917a5cf3ff7ade296b46134d91e6a
author Richard Weinberger <richard@nod.at> Fri Jan 13 15:07:40 2012 +0100
committer Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Sun Jan 15 15:06:08 2012 +0200
tree 5f6f45af1f25eb25f99ac110f27084bd29cfb260
parent e234b5f2079414b3d772286e3ee00e7bbf6da833

UBI: fix nameless volumes handling

Currently it's possible to create a volume without a name. E.g:
ubimkvol -n 32 -s 2MiB -t static /dev/ubi0 -N ""

After that vtbl_check() will always fail because it does not permit
empty strings.

Cc: stable@kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>

drivers/mtd/ubi/cdev.c

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 3320a50..ad76592 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -632,6 +632,9 @@
 	if (req->alignment != 1 && n)
 		goto bad;
 
+	if (!req->name[0] || !req->name_len)
+		goto bad;
+
 	if (req->name_len > UBI_VOL_NAME_MAX) {
 		err = -ENAMETOOLONG;
 		goto bad;