Index: openssl/ssl/t1_enc.c
============================================================================
$ diff -ru ssl/t1_enc.c ssl/t1_enc.c
--- t1_enc.c.orig       Tue Dec 10 15:36:05 2013
+++ t1_enc.c    Wed Dec 11 09:29:02 2013
@@ -980,7 +980,10 @@
 		}
 		else
 		{
-			EVP_MD_CTX_copy(&hmac,hash);
+			if (EVP_MD_CTX_copy(&hmac,hash) != 1)
+				{
+				return (0);
+				}
 			mac_ctx = &hmac;
 		}