From 94d76ffcd27f5940b5e022d83b7ea16ae8f05522 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Wed, 18 Sep 2024 15:07:46 +0800
Subject: [PATCH] fix(stmt/settag): return error if var tag's length is null

---
 source/libs/parser/src/parInsertStmt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/libs/parser/src/parInsertStmt.c b/source/libs/parser/src/parInsertStmt.c
index 9f3d5b5a81..ea11f7434f 100644
--- a/source/libs/parser/src/parInsertStmt.c
+++ b/source/libs/parser/src/parInsertStmt.c
@@ -155,6 +155,10 @@ int32_t qBindStmtTagsValue(void* pBlock, void* boundTags, int64_t suid, const ch
     SSchema* pTagSchema = &pSchema[tags->pColIndex[c]];
     int32_t  colLen = pTagSchema->bytes;
     if (IS_VAR_DATA_TYPE(pTagSchema->type)) {
+      if (!bind[c].length) {
+        code = buildInvalidOperationMsg(&pBuf, "var tag length is null");
+        goto end;
+      }
       colLen = bind[c].length[0];
       if ((colLen + VARSTR_HEADER_SIZE) > pTagSchema->bytes) {
         code = buildInvalidOperationMsg(&pBuf, "tag length is too big");