[PATCH 6/7] crypto: qat - return error for block ciphers for invalid requests

[Giovanni Cabiddu]

Return -EINVAL if a request for a block cipher is not multiple of the
size of the block.

This problem was found with by the new extra run-time crypto self test.

Reviewed-by: Conor Mcloughlin <conor.mclough...@intel.com>
Tested-by: Sergey Portnoy <sergey.port...@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabi...@intel.com>
---
 drivers/crypto/qat/qat_common/qat_algs.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c 
b/drivers/crypto/qat/qat_common/qat_algs.c
index f9a46918c9d1..868fefa9bb65 100644
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -1096,6 +1096,14 @@ static int qat_alg_ablkcipher_encrypt(struct 
ablkcipher_request *req)
        return -EINPROGRESS;
 }
 
+static int qat_alg_ablkcipher_blk_encrypt(struct ablkcipher_request *req)
+{
+       if (req->nbytes % AES_BLOCK_SIZE != 0)
+               return -EINVAL;
+
+       return qat_alg_ablkcipher_encrypt(req);
+}
+
 static int qat_alg_ablkcipher_decrypt(struct ablkcipher_request *req)
 {
        struct crypto_ablkcipher *atfm = crypto_ablkcipher_reqtfm(req);
@@ -1145,6 +1153,13 @@ static int qat_alg_ablkcipher_decrypt(struct 
ablkcipher_request *req)
        return -EINPROGRESS;
 }
 
+static int qat_alg_ablkcipher_blk_decrypt(struct ablkcipher_request *req)
+{
+       if (req->nbytes % AES_BLOCK_SIZE != 0)
+               return -EINVAL;
+
+       return qat_alg_ablkcipher_decrypt(req);
+}
 static int qat_alg_aead_init(struct crypto_aead *tfm,
                             enum icp_qat_hw_auth_algo hash,
                             const char *hash_name)
@@ -1304,8 +1319,8 @@ static struct crypto_alg qat_algs[] = { {
        .cra_u = {
                .ablkcipher = {
                        .setkey = qat_alg_ablkcipher_cbc_setkey,
-                       .decrypt = qat_alg_ablkcipher_decrypt,
-                       .encrypt = qat_alg_ablkcipher_encrypt,
+                       .decrypt = qat_alg_ablkcipher_blk_decrypt,
+                       .encrypt = qat_alg_ablkcipher_blk_encrypt,
                        .min_keysize = AES_MIN_KEY_SIZE,
                        .max_keysize = AES_MAX_KEY_SIZE,
                        .ivsize = AES_BLOCK_SIZE,
@@ -1348,8 +1363,8 @@ static struct crypto_alg qat_algs[] = { {
        .cra_u = {
                .ablkcipher = {
                        .setkey = qat_alg_ablkcipher_xts_setkey,
-                       .decrypt = qat_alg_ablkcipher_decrypt,
-                       .encrypt = qat_alg_ablkcipher_encrypt,
+                       .decrypt = qat_alg_ablkcipher_blk_decrypt,
+                       .encrypt = qat_alg_ablkcipher_blk_encrypt,
                        .min_keysize = 2 * AES_MIN_KEY_SIZE,
                        .max_keysize = 2 * AES_MAX_KEY_SIZE,
                        .ivsize = AES_BLOCK_SIZE,
-- 
2.20.1