[PATCH 1/6] crypto-caamhash: Use kmalloc_array() in ahash_setkey()

SF Markus Elfring
2016-09-15T14:40:39Z

Date: Thu, 15 Sep 2016 11:20:09 +0200

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

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.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/crypto/caam/caamhash.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 9d7fc9e..f19df8f 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -525,8 +525,9 @@ static int ahash_setkey(struct crypto_ahash *ahash,
#endif

if (keylen > blocksize) {
- hashed_key = kmalloc(sizeof(u8) * digestsize, GFP_KERNEL |
- GFP_DMA);
+ hashed_key = kmalloc_array(digestsize,
+ sizeof(*hashed_key),
+ GFP_KERNEL | GFP_DMA);
if (!hashed_key)
return -ENOMEM;
ret = hash_digest_key(ctx, key, &keylen, hashed_key,
--
2.10.0