From 77cfab5093c69723b568c8e6580d79aa455345c2 Mon Sep 17 00:00:00 2001
From: wangjiaming0909 <604227650@qq.com>
Date: Tue, 16 May 2023 18:12:44 +0800
Subject: [PATCH] fix: invalid memory access of buffer after vsnprintf

---
 source/util/src/tlog.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index c8ac15786f..16dac70103 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -556,6 +556,7 @@ void taosPrintLongString(const char *flags, ELogLevel level, int32_t dflag, cons
   len += vsnprintf(buffer + len, LOG_MAX_LINE_DUMP_BUFFER_SIZE - 2 - len, format, argpointer);
   va_end(argpointer);
 
+  len = len > LOG_MAX_LINE_DUMP_BUFFER_SIZE - 2 ? LOG_MAX_LINE_DUMP_BUFFER_SIZE - 2 : len;
   buffer[len++] = '\n';
   buffer[len] = 0;