From 7e4d5dabe7a9b754c601f214e65b544e67ba9f59 Mon Sep 17 00:00:00 2001
From: Up-wind <lj.upwind@gmail.com>
Date: Mon, 25 Mar 2024 20:07:11 +0800
Subject: [PATCH] Add NULL check to cJSON_SetValuestring()

If the valuestring passed to cJSON_SetValuestring is NULL, a null pointer dereference will happen.

This commit adds the NULL check of valuestring before it is dereferenced.
---
 cJSON.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cJSON.c b/cJSON.c
index 4e4979e9..8903e4c2 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -406,7 +406,7 @@ CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring)
         return NULL;
     }
     /* return NULL if the object is corrupted */
-    if (object->valuestring == NULL)
+    if (object->valuestring == NULL || valuestring == NULL)
     {
         return NULL;
     }