diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 9acf213171bb0ca62da40cbd43eb88932a44d431..528c936e124a26f25c1c27fad2bea3310cf50059 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -2241,7 +2241,7 @@ int32_t setShowInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
 
     // show vnodes may be ip addr of dnode in payload
     SSQLToken* pDnodeIp = &pShowInfo->prefix;
-    if (pDnodeIp->n > TSDB_IPv4ADDR_LEN) {  // ip addr is too long
+    if (pDnodeIp->n >= TSDB_IPv4ADDR_LEN) {  // ip addr is too long
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
     }
 
diff --git a/src/mnode/src/mnodeProfile.c b/src/mnode/src/mnodeProfile.c
index bfb92096ecf84ecf4b8afcd77d83ec389468567d..96bc98d6590c4effa0ae894904dcdb2f648dc69f 100644
--- a/src/mnode/src/mnodeProfile.c
+++ b/src/mnode/src/mnodeProfile.c
@@ -222,7 +222,7 @@ static int32_t mnodeRetrieveConns(SShowObj *pShow, char *data, int32_t rows, voi
   SConnObj *pConnObj = NULL;
   int32_t   cols = 0;
   char *    pWrite;
-  char      ipStr[TSDB_IPv4ADDR_LEN + 7];
+  char      ipStr[TSDB_IPv4ADDR_LEN + 6];
 
   while (numOfRows < rows) {
     pShow->pIter = mnodeGetNextConn(pShow->pIter, &pConnObj);
@@ -239,8 +239,8 @@ static int32_t mnodeRetrieveConns(SShowObj *pShow, char *data, int32_t rows, voi
     cols++;
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-    snprintf(ipStr, TSDB_IPv4ADDR_LEN + 6, "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
-    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, TSDB_IPv4ADDR_LEN + 6);
+    snprintf(ipStr, sizeof(ipStr), "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, sizeof(ipStr));
     cols++;
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
@@ -342,7 +342,7 @@ static int32_t mnodeRetrieveQueries(SShowObj *pShow, char *data, int32_t rows, v
   SConnObj *pConnObj = NULL;
   int32_t   cols = 0;
   char *    pWrite;
-  char      ipStr[TSDB_IPv4ADDR_LEN + 7];
+  char      ipStr[TSDB_IPv4ADDR_LEN + 6];
 
   while (numOfRows < rows) {
     pShow->pIter = mnodeGetNextConn(pShow->pIter, &pConnObj);
@@ -362,8 +362,8 @@ static int32_t mnodeRetrieveQueries(SShowObj *pShow, char *data, int32_t rows, v
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      snprintf(ipStr, TSDB_IPv4ADDR_LEN + 6, "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
-      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, TSDB_IPv4ADDR_LEN + 6);
+      snprintf(ipStr, sizeof(ipStr), "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, sizeof(ipStr));
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
@@ -463,7 +463,7 @@ static int32_t mnodeRetrieveStreams(SShowObj *pShow, char *data, int32_t rows, v
   SConnObj *pConnObj = NULL;
   int32_t   cols = 0;
   char *    pWrite;
-  char      ipStr[TSDB_IPv4ADDR_LEN + 7];
+  char      ipStr[TSDB_IPv4ADDR_LEN + 6];
 
   while (numOfRows < rows) {
     pShow->pIter = mnodeGetNextConn(pShow->pIter, &pConnObj);
@@ -483,8 +483,8 @@ static int32_t mnodeRetrieveStreams(SShowObj *pShow, char *data, int32_t rows, v
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      snprintf(ipStr, TSDB_IPv4ADDR_LEN + 6, "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
-      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, TSDB_IPv4ADDR_LEN + 6);
+      snprintf(ipStr, sizeof(ipStr), "%s:%u", taosIpStr(pConnObj->ip), pConnObj->port);
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, ipStr, sizeof(ipStr));
       cols++;
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;