[PATCH v2 9/9] crypto: qat - zeroize crypto_aes_ctx with __cleanup(aes_clear_ctx)

[Thomas Huth <thuth@redhat.com>]

From: Thomas Huth <thuth@redhat.com>

A recent patch by Giovanni Cabiddu already added a memzero_explicit()
for the crypto_aes_ctx in the qat_alg_xts_reverse_key() function,
but since we introduced __cleanup(aes_clear_ctx) markers in previous
commits in many spots of the code already, let's use it here now, too,
to have the same code pattern everywhere.

Cc: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 drivers/crypto/intel/qat/qat_common/qat_algs.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/crypto/intel/qat/qat_common/qat_algs.c b/drivers/crypto/intel/qat/qat_common/qat_algs.c
index 91663805d9e60..9a56fcdedd579 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/intel/qat/qat_common/qat_algs.c
@@ -388,7 +388,7 @@ static void qat_alg_skcipher_init_enc(struct qat_alg_skcipher_ctx *ctx,
 static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen,
 				    u8 *key_reverse)
 {
-	struct crypto_aes_ctx aes_expanded;
+	struct crypto_aes_ctx aes_expanded __cleanup(aes_clear_ctx);
 	int nrounds;
 	u8 *key;
 
@@ -405,7 +405,6 @@ static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen,
 		memcpy(key_reverse + AES_BLOCK_SIZE, key - AES_BLOCK_SIZE,
 		       AES_BLOCK_SIZE);
 	}
-	memzero_explicit(&aes_expanded, sizeof(aes_expanded));
 }
 
 static void qat_alg_skcipher_init_dec(struct qat_alg_skcipher_ctx *ctx,
-- 
2.55.0