1 files changed, 6 insertions, 1 deletions
diff --git a/Cryptlib/OpenSSL/crypto/conf/conf_mod.c b/Cryptlib/OpenSSL/crypto/conf/conf_mod.c
index ffc477c7..9acfca4f 100644
--- a/Cryptlib/OpenSSL/crypto/conf/conf_mod.c
+++ b/Cryptlib/OpenSSL/crypto/conf/conf_mod.c
@@ -562,8 +562,13 @@ int CONF_parse_list(const char *list_, int sep, int nospc,
 {
     int ret;
     const char *lstart, *tmpend, *p;
-    lstart = list_;
 
+    if (list_ == NULL) {
+        CONFerr(CONF_F_CONF_PARSE_LIST, CONF_R_LIST_CANNOT_BE_NULL);
+        return 0;
+    }
+
+    lstart = list_;
     for (;;) {
         if (nospc) {
             while (*lstart && isspace((unsigned char)*lstart))