crypto: ccree - zero out internal struct before use

We did not zero out the internal struct before use causing problem
in some rare error code paths.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccree/cc_aead.c

@@ -2095,6 +2095,8 @@ static int cc_aead_encrypt(struct aead_request *req)
 	struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
 	int rc;
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2124,6 +2126,8 @@ static int cc_rfc4309_ccm_encrypt(struct aead_request *req)
 		goto out;
 	}
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2143,6 +2147,8 @@ static int cc_aead_decrypt(struct aead_request *req)
 	struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
 	int rc;
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2170,6 +2176,8 @@ static int cc_rfc4309_ccm_decrypt(struct aead_request *req)
 		goto out;
 	}
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2287,6 +2295,8 @@ static int cc_rfc4106_gcm_encrypt(struct aead_request *req)
 		goto out;
 	}
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2310,6 +2320,8 @@ static int cc_rfc4543_gcm_encrypt(struct aead_request *req)
 	struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
 	int rc;
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	//plaintext is not encryped with rfc4543
 	areq_ctx->plaintext_authenticate_only = true;
 
@@ -2342,6 +2354,8 @@ static int cc_rfc4106_gcm_decrypt(struct aead_request *req)
 		goto out;
 	}
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	/* No generated IV required */
 	areq_ctx->backup_iv = req->iv;
 	areq_ctx->backup_giv = NULL;
@@ -2365,6 +2379,8 @@ static int cc_rfc4543_gcm_decrypt(struct aead_request *req)
 	struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
 	int rc;
 
+	memset(areq_ctx, 0, sizeof(*areq_ctx));
+
 	//plaintext is not decryped with rfc4543
 	areq_ctx->plaintext_authenticate_only = true;