From: Matt Caswell <matt@openssl.org>
Date: Fri, 24 Apr 2020 10:44:15 +0000 (+0100)
Subject: Ensure OSSL_PARAM_BLD_free() can accept a NULL
X-Git-Tag: openssl-3.0.0-alpha2~91
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=a6f8a834ba6f877baa427e3d25694d49beb29306

Ensure OSSL_PARAM_BLD_free() can accept a NULL

All OpenSSL free functions should accept NULL.

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/11635)
---

diff --git a/crypto/param_build.c b/crypto/param_build.c
index 43b194bcea..76522cd377 100644
--- a/crypto/param_build.c
+++ b/crypto/param_build.c
@@ -125,6 +125,8 @@ static void free_all_params(OSSL_PARAM_BLD *bld)
 
 void OSSL_PARAM_BLD_free(OSSL_PARAM_BLD *bld)
 {
+    if (bld == NULL)
+        return;
     free_all_params(bld);
     sk_OSSL_PARAM_BLD_DEF_free(bld->params);
     OPENSSL_free(bld);