diff --git a/components/connectivity/qcloud-iot-hub-sdk-3.1.2/3rdparty/sdk_src/utils/json_token.c b/components/connectivity/qcloud-iot-hub-sdk-3.1.2/3rdparty/sdk_src/utils/json_token.c
index 8c51cb9f..411d78bb 100644
--- a/components/connectivity/qcloud-iot-hub-sdk-3.1.2/3rdparty/sdk_src/utils/json_token.c
+++ b/components/connectivity/qcloud-iot-hub-sdk-3.1.2/3rdparty/sdk_src/utils/json_token.c
@@ -99,6 +99,9 @@ list_head_t *LITE_json_keys_of(char *src, char *prefix)
             json_key_t     *entry = NULL;
 
             entry = HAL_Malloc(sizeof(json_key_t));
+            if (NULL == entry) {
+                return NULL;
+            }
             memset(entry, 0, sizeof(json_key_t));
             entry->key = LITE_format_string("%s%.*s", prefix, klen, key);
             list_add_tail(&entry->list, &keylist);
@@ -117,6 +120,9 @@ list_head_t *LITE_json_keys_of(char *src, char *prefix)
         json_key_t     *entry = NULL;
 
         entry = HAL_Malloc(sizeof(json_key_t));
+        if (NULL == entry) {
+            return NULL;
+        }
         memset(entry, 0, sizeof(json_key_t));
         list_add_tail(&entry->list, &keylist);