diff --git a/src/common/backend/catalog/gs_package.cpp b/src/common/backend/catalog/gs_package.cpp
index 5c7797fef..46cf35dd5 100644
--- a/src/common/backend/catalog/gs_package.cpp
+++ b/src/common/backend/catalog/gs_package.cpp
@@ -1748,15 +1748,18 @@ bool isSameArgList(CreateFunctionStmt* stmt1, CreateFunctionStmt* stmt2)
         if (inArgNum1 != inArgNum2) {
             return false;
         } else if (inArgNum1 == inArgNum2 && length1 != length2) {
-            char message[MAXSTRLEN];
-            errno_t rc = sprintf_s(message, MAXSTRLEN, "can not override out param:%s", NameListToString(stmt1->funcname));
+            char message[MAXSTRLEN], funcname[MAXSTRLEN];
+            char *p = NameListToString(stmt1->funcname);
+            errno_t rc = strcpy_s(funcname, MAXSTRLEN, p);
+            securec_check(rc, "\0", "\0");
+            pfree(p);
+            rc = sprintf_s(message, MAXSTRLEN, "can not override out param:%s", funcname);
             securec_check_ss(rc, "", "");
             InsertErrorMessage(message, stmt1->startLineNumber);
             ereport(ERROR,
                 (errcode(ERRCODE_UNDEFINED_FUNCTION),
                     errmodule(MOD_PLSQL),
-                    errmsg("can not override out param:%s",
-                    NameListToString(stmt1->funcname))));
+                    errmsg("can not override out param:%s", funcname)));
         }
     } else {
         if (length1 != length2) {