crypto/ipsec_mb: fix buffer overrun

[ upstream commit 4582f79 ]

Memory for ZUC cipher/auth key in session had to be expanded to 32 bytes,
instead of 16 bytes, when adding ZUC-256 support.
However, impact is low as this memory is part of a union
with bigger size than 32 bytes.

Coverity issue: 374374
Coverity issue: 374379
Fixes: 8c83501 ("crypto/ipsec_mb: support ZUC-256 for aesni_mb")

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>

drivers/crypto/ipsec_mb/pmd_aesni_mb_priv.h

@@ -848,7 +848,7 @@ struct aesni_mb_session {
 
 			struct gcm_key_data gcm_key;
 			/* *< Expanded GCM key */
-			uint8_t zuc_cipher_key[16];
+			uint8_t zuc_cipher_key[32];
 			/* *< ZUC cipher key */
 			snow3g_key_schedule_t pKeySched_snow3g_cipher;
 			/* *< SNOW3G scheduled cipher key */
@@ -893,7 +893,7 @@ struct aesni_mb_session {
 				/* *< k3. */
 			} cmac;
 			/* *< Expanded XCBC authentication keys */
-			uint8_t zuc_auth_key[16];
+			uint8_t zuc_auth_key[32];
 			/* *< ZUC authentication key */
 			snow3g_key_schedule_t pKeySched_snow3g_auth;
 			/* *< SNOW3G scheduled authentication key */