ssl_create_cipher_list: check whether push onto cipherstack succeeds

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/ssl_ciph.c

diff --git a/ssl/ssl_ciph.c b/ssl/ssl_ciph.c
index 464a767..a846c75 100644
--- a/ssl/ssl_ciph.c
+++ b/ssl/ssl_ciph.c
@@ -1621,7 +1621,12 @@
 		if (curr->active)
 #endif
 			{
-			sk_SSL_CIPHER_push(cipherstack, curr->cipher);
+			if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher))
+				{
+				OPENSSL_free(co_list);
+				sk_SSL_CIPHER_free(cipherstack);
+				return NULL;
+				}
 #ifdef CIPHER_DEBUG
 			printf("<%s>\n",curr->cipher->name);
 #endif