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Subject[PATCH 71/91] UBI: fix nameless volumes handling
2.6.27-longterm review patch.  If anyone has any objections, please let us know.

------------------
commit 4a59c797a18917a5cf3ff7ade296b46134d91e6a upstream.

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.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/mtd/ubi/cdev.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
Index: longterm-2.6.27/drivers/mtd/ubi/cdev.c
===================================================================
--- longterm-2.6.27.orig/drivers/mtd/ubi/cdev.c 2012-02-05 22:34:32.837915400 +0100
+++ longterm-2.6.27/drivers/mtd/ubi/cdev.c 2012-02-05 22:34:44.966914934 +0100
@@ -569,6 +569,9 @@
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;



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