From eada31bc1320088600bb0963b43397dbe0c21b91 Mon Sep 17 00:00:00 2001
From: Luan-233 <2533556772@qq.com>
Date: Fri, 28 Jul 2023 16:42:01 +0800
Subject: [PATCH] fix a bug when modify the parameter audit_data_format, if
 length is more than MAX_LENGTH, the errorcode is not the expected one.

---
 src/common/backend/utils/misc/guc.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/common/backend/utils/misc/guc.cpp b/src/common/backend/utils/misc/guc.cpp
index d5f45e920..08c83557f 100755
--- a/src/common/backend/utils/misc/guc.cpp
+++ b/src/common/backend/utils/misc/guc.cpp
@@ -8580,6 +8580,11 @@ static void replace_config_value(char** optlines, char* name, char* value, confi
             rc = snprintf_s(newline, MAX_PARAM_LEN, MAX_PARAM_LEN - 1, "%s = %s\n", name, value);
             break;
         case PGC_STRING:
+            if (strlen(name) + strlen(value) + 6 >= MAX_PARAM_LEN) {
+                pfree(newline);
+                ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+                errmsg("too long for GUC parameter.")));
+            }
             rc = snprintf_s(newline, MAX_PARAM_LEN, MAX_PARAM_LEN - 1, "%s = '%s'\n", name, value);
             break;
     }