[PATCH 01/10] md/dm-crypt: Use kcalloc() in crypt_alloc_tfms()

From: SF Markus Elfring
Date: Wed Sep 28 2016 - 11:37:17 EST

From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Sep 2016 13:26:22 +0200

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus reuse the corresponding function "kcalloc".

This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.

Fixes: 5d0be84ec0cacfc7a6d6ea548afdd07d481324cd ("dm crypt: fix free of bad values after tfm allocation failure")
Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
drivers/md/dm-crypt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a276883..68971a2 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1454,8 +1454,7 @@ static int crypt_alloc_tfms(struct crypt_config *cc, char *ciphermode)
unsigned i;
int err;

- cc->tfms = kzalloc(cc->tfms_count * sizeof(struct crypto_skcipher *),
+ cc->tfms = kcalloc(cc->tfms_count, sizeof(*cc->tfms), GFP_KERNEL);
if (!cc->tfms)
return -ENOMEM;