[PATCH 103/241] mtd: ofpart: Fix incorrect NULL check in parse_ofoldpart_partitions()

Herton Ronaldo Krzesinski herton.krzesinski at canonical.com
Thu Dec 13 13:57:48 UTC 2012 -stable review patch.  If anyone has any objections, please let me know.


From: Sachin Kamat <sachin.kamat at linaro.org>

commit 5a6ea4af0907f995dc06df21a9c9ef764c7cd3bc upstream.

The pointer returned by kzalloc should be tested for NULL
to avoid potential NULL pointer dereference later. Incorrect
pointer was being tested for NULL. Bug introduced by commit fbcf62a3
(mtd: physmap_of: move parse_obsolete_partitions to become separate
This patch fixes this bug.

Cc: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>
Cc: Artem Bityutskiy <artem.bityutskiy at intel.com>
Signed-off-by: Sachin Kamat <sachin.kamat at linaro.org>
Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
 drivers/mtd/ofpart.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c
index 64be8f0..d9127e2 100644
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -121,7 +121,7 @@ static int parse_ofoldpart_partitions(struct mtd_info *master,
 	nr_parts = plen / sizeof(part[0]);
 	*pparts = kzalloc(nr_parts * sizeof(*(*pparts)), GFP_KERNEL);
-	if (!pparts)
+	if (!*pparts)
 		return -ENOMEM;
 	names = of_get_property(dp, "partition-names", &plen);

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