From dc7e42c6a12637bae1660561d3f4cef039001475 Mon Sep 17 00:00:00 2001
From: x2018 <xkernel.wang@foxmail.com>
Date: Tue, 23 Nov 2021 19:25:43 +0800
Subject: [PATCH] check the return value of OPENSSL_strdup to prevent potential
 memory access error

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17110)
---
 apps/lib/engine_loader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/lib/engine_loader.c b/apps/lib/engine_loader.c
index 7ea05943f38..aa1bad26a4b 100644
--- a/apps/lib/engine_loader.c
+++ b/apps/lib/engine_loader.c
@@ -89,7 +89,7 @@ static OSSL_STORE_LOADER_CTX *engine_open(const OSSL_STORE_LOADER *loader,
         keyid = OPENSSL_strdup(q + 1);
     }
 
-    if (e != NULL)
+    if (e != NULL && keyid != NULL)
         ctx = OSSL_STORE_LOADER_CTX_new(e, keyid);
 
     if (ctx == NULL) {
-- 
2.47.2