From ebd2fdc1564bc9c65241239f4c6df71879b2b935 Mon Sep 17 00:00:00 2001
From: Huo Linhe <linhehuo@gmail.com>
Date: Wed, 23 Jun 2021 14:44:11 +0800
Subject: [PATCH] [TD-4872]<fix>: fix buffer overflow in -O3 build

---
 src/tfs/src/tfs.c      | 4 +++-
 src/util/src/tconfig.c | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/tfs/src/tfs.c b/src/tfs/src/tfs.c
index f78535b8ed..9dc68dcdfd 100644
--- a/src/tfs/src/tfs.c
+++ b/src/tfs/src/tfs.c
@@ -480,11 +480,13 @@ static int tfsFormatDir(char *idir, char *odir) {
     return -1;
   }
 
-  if (realpath(wep.we_wordv[0], odir) == NULL) {
+  char tmp[PATH_MAX] = {0};
+  if (realpath(wep.we_wordv[0], tmp) == NULL) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     wordfree(&wep);
     return -1;
   }
+  strcpy(odir, tmp);
 
   wordfree(&wep);
   return 0;
diff --git a/src/util/src/tconfig.c b/src/util/src/tconfig.c
index c4bd577602..442e83bb4f 100644
--- a/src/util/src/tconfig.c
+++ b/src/util/src/tconfig.c
@@ -151,7 +151,7 @@ static bool taosReadDirectoryConfig(SGlobalCfg *cfg, char *input_value) {
 
       wordfree(&full_path);
 
-      char tmp[1025] = {0};
+      char tmp[PATH_MAX] = {0};
       if (realpath(option, tmp) != NULL) {
         strcpy(option, tmp);
       }
-- 
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