From 2ecd4900d36873a253e4f1924487e56054fae0ba Mon Sep 17 00:00:00 2001
From: liuxianliang <liuxianliang@rt-thread.com>
Date: Sat, 19 Jun 2021 16:49:15 +0800
Subject: [PATCH] [fix] add "resp_len" to avoid risk.

---
 src/webclient.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/webclient.c b/src/webclient.c
index df4716e..2f60628 100644
--- a/src/webclient.c
+++ b/src/webclient.c
@@ -1044,6 +1044,7 @@ int webclient_shard_position_function(struct webclient_session *session, const c
 {
     int rc = WEBCLIENT_OK;
     int resp_status = 0;
+    int resp_len = 0;
     char *buffer = RT_NULL;
     int start_position, end_position = 0;
     int total_len = 0;
@@ -1137,7 +1138,7 @@ int webclient_shard_position_function(struct webclient_session *session, const c
         }
 
         /* receive the incoming data */
-        data_len = webclient_response(session, (void **)&buffer, (size_t *)RT_NULL);
+        data_len = webclient_response(session, (void **)&buffer, &resp_len);
         if(data_len > 0)
         {
             start_position += mem_size;