diff --git a/dbaccess/sql_db.cpp b/dbaccess/sql_db.cpp
index ad81ed9..3077f96 100644
--- a/dbaccess/sql_db.cpp
+++ b/dbaccess/sql_db.cpp
@@ -1194,7 +1194,7 @@ int SqliteDB::QueryofflineData() {
                 char whereCon[64] = {0};
                 memset(whereCon, 0, 64);
                 sprintf(whereCon, "dataNodeNo = '%s' and TimeStamp = '%s'", arrRetData[j][0].c_str(), arrRetData[j][8].c_str());
-                memcpy(updateSql, "sendMsg='1'", sizeof(updateSql));
+                memcpy(updateSql, "sendMsg='1'", 11);
                 res = sqlite_db_ctrl::instance().UpdateTableData(StaticTableName, updateSql, whereCon);
                 if(res !=0 ){
                     zlog_error(zct, "res = %d", res);
diff --git a/jsonparse/mqtt_cmd_parse.cpp b/jsonparse/mqtt_cmd_parse.cpp
index 73dcfab..dfbed36 100644
--- a/jsonparse/mqtt_cmd_parse.cpp
+++ b/jsonparse/mqtt_cmd_parse.cpp
@@ -397,7 +397,7 @@ std::string JsonData::JsonCmd_52() {
     char whereCon[512] = {};
     std::string strTimeStamp = "";
     char selectCon[128] = {0};
-    memcpy(selectCon, "sendMsg = '0'", sizeof(selectCon));
+    memcpy(selectCon, "sendMsg = '0'", 13);
     int count = sqlite_db_ctrl::instance().GetTableRows(T_DATASTATIC_INFO(TNAME), selectCon);
     if (count < 1) {
         return "";
diff --git a/uart/uart.cpp b/uart/uart.cpp
index f4663fa..0953cb3 100644
--- a/uart/uart.cpp
+++ b/uart/uart.cpp
@@ -517,7 +517,7 @@ void Uart::DealDataNodeName(const char *pData) {
     std::string strTime = GetLocalTimeWithMs();
     char szShortAdd[8] = {0x00};
     char shortAdd[8] = {0x00};
-    char NodeName[64] = {0x00};
+    char NodeName[128] = {0x00};
     sprintf(szShortAdd, "%02x%02x", pData[3] & 0xFF, pData[4] & 0xFF);
     memcpy(NodeName, &pData[7], 64);
     memcpy(shortAdd, &pData[3], 2);