Fix a leak in SSL_clear()

SSL_clear() was resetting numwpipes to 0, but not freeing any allocated
memory for existing write buffers.

Fixes #2026

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 4bf086005fe5ebcda5dc4d48ff701b41ab9b07f0)

1 files changed, 9 insertions, 1 deletions

diff --git a/test/sslapitest.c b/test/sslapitest.c
index 90326d9f9d..01811bf7e6 100644
--- a/test/sslapitest.c
+++ b/test/sslapitest.c
@@ -101,8 +101,16 @@ static int execute_test_large_message(const SSL_METHOD *smeth,
         goto end;
     }
 
-    testresult = 1;
+    /*
+     * Calling SSL_clear() first is not required but this tests that SSL_clear()
+     * doesn't leak (when using enable-crypto-mdebug).
+     */
+    if (!SSL_clear(serverssl)) {
+        printf("Unexpected failure from SSL_clear()\n");
+        goto end;
+    }
 
+    testresult = 1;
  end:
     X509_free(chaincert);
     SSL_free(serverssl);