From d5bacb71c604c3e1754dcfc58dc50ca5c2180c1a Mon Sep 17 00:00:00 2001
From: Shuduo Sang <sangshuduo@gmail.com>
Date: Fri, 19 Mar 2021 11:51:13 +0800
Subject: [PATCH] [TD-3369] <fix>: fix taosdemo invalid write valgrind reports.
 (#5496)

---
 src/kit/taosdemo/taosdemo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 2647d32ef5..13926e0712 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -997,7 +997,7 @@ void rand_string(char *str, int size) {
   if (size > 0) {
     //--size;
     int n;
-    for (n = 0; n < size; n++) {
+    for (n = 0; n < size - 1; n++) {
       int key = rand_tinyint() % (int)(sizeof(charset) - 1);
       str[n] = charset[key];
     }
-- 
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