From cf9cd211f5daa4bbce9ee8dc167a613927c1d397 Mon Sep 17 00:00:00 2001
From: Hongze Cheng <hzcheng@taosdata.com>
Date: Mon, 3 Jun 2024 13:36:16 +0800
Subject: [PATCH] fix: possible coredump

---
 source/common/src/tdataformat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 8d3db72fb5..fb97c011fa 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -383,7 +383,9 @@ static int32_t tRowBuildKVRow(SArray *aColVal, const SRowBuildScanInfo *sinfo, c
           if (IS_VAR_DATA_TYPE(schema->columns[i].type)) {
             payloadSize += tPutI16v(payload + payloadSize, colValArray[colValIndex].cid);
             payloadSize += tPutU32v(payload + payloadSize, colValArray[colValIndex].value.nData);
-            memcpy(payload + payloadSize, colValArray[colValIndex].value.pData, colValArray[colValIndex].value.nData);
+            if (colValArray[colValIndex].value.nData > 0) {
+              memcpy(payload + payloadSize, colValArray[colValIndex].value.pData, colValArray[colValIndex].value.nData);
+            }
             payloadSize += colValArray[colValIndex].value.nData;
           } else {
             payloadSize += tPutI16v(payload + payloadSize, colValArray[colValIndex].cid);