[PATCH] crypto/openssl: fix memory leak in auth processing function

[Didier Pallard]

Contexts allocated with EVP_MAC_CTX_new calls are leaking, they are created
then overwritten by the return value of EVP_MAC_CTX_dup call.

Fixes: 75adf1eae44f ("crypto/openssl: update HMAC routine with 3.0 EVP API")
Fixes: 2b9c693f6ef5 ("crypto/openssl: support AES-CMAC operations")
Signed-off-by: Didier Pallard <didier.pallard at 6wind.com>
Cc: stable at dpdk.org
---
 drivers/crypto/openssl/rte_openssl_pmd.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/crypto/openssl/rte_openssl_pmd.c b/drivers/crypto/openssl/rte_openssl_pmd.c
index 384d26262105..e00db0facba5 100644
--- a/drivers/crypto/openssl/rte_openssl_pmd.c
+++ b/drivers/crypto/openssl/rte_openssl_pmd.c
@@ -1797,7 +1797,6 @@ process_openssl_auth_op(struct openssl_qp *qp, struct rte_crypto_op *op,
 # if OPENSSL_VERSION_NUMBER >= 0x30000000L
 	EVP_MAC_CTX *ctx_h;
 	EVP_MAC_CTX *ctx_c;
-	EVP_MAC *mac;
 # else
 	HMAC_CTX *ctx_h;
 	CMAC_CTX *ctx_c;
@@ -1818,10 +1817,7 @@ process_openssl_auth_op(struct openssl_qp *qp, struct rte_crypto_op *op,
 		break;
 	case OPENSSL_AUTH_AS_HMAC:
 # if OPENSSL_VERSION_NUMBER >= 0x30000000L
-		mac = EVP_MAC_fetch(NULL, "HMAC", NULL);
-		ctx_h = EVP_MAC_CTX_new(mac);
 		ctx_h = EVP_MAC_CTX_dup(sess->auth.hmac.ctx);
-		EVP_MAC_free(mac);
 		status = process_openssl_auth_mac(mbuf_src, dst,
 				op->sym->auth.data.offset, srclen,
 				ctx_h);
@@ -1836,10 +1832,7 @@ process_openssl_auth_op(struct openssl_qp *qp, struct rte_crypto_op *op,
 		break;
 	case OPENSSL_AUTH_AS_CMAC:
 # if OPENSSL_VERSION_NUMBER >= 0x30000000L
-		mac = EVP_MAC_fetch(NULL, OSSL_MAC_NAME_CMAC, NULL);
-		ctx_c = EVP_MAC_CTX_new(mac);
 		ctx_c = EVP_MAC_CTX_dup(sess->auth.cmac.ctx);
-		EVP_MAC_free(mac);
 		status = process_openssl_auth_mac(mbuf_src, dst,
 				op->sym->auth.data.offset, srclen,
 				ctx_c);
-- 
2.30.2