Avoid NULL deref on BIO_new{_mem_buf,}() failure.

diff --git a/regress/lib/libssl/client/clienttest.c b/regress/lib/libssl/client/clienttest.c
index be9ebc1..51b2398 100644 (file)
--- a/regress/lib/libssl/client/clienttest.c
+++ b/regress/lib/libssl/client/clienttest.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: clienttest.c,v 1.26 2020/11/19 09:35:50 tb Exp $ */
+/*     $OpenBSD: clienttest.c,v 1.27 2021/01/22 15:54:32 tb Exp $ */
 /*
  * Copyright (c) 2015 Joel Sing <jsing@openbsd.org>
  *
@@ -456,8 +456,10 @@ client_hello_test(int testno, struct client_hello_test *cht)
        SSL_CTX_free(ssl_ctx);
        SSL_free(ssl);
 
-       rbio->references = 1;
-       wbio->references = 1;
+       if (rbio != NULL)
+               rbio->references = 1;
+       if (wbio != NULL)
+               wbio->references = 1;
 
        BIO_free(rbio);
        BIO_free(wbio);