diff --git a/src/tfs/src/tfs.c b/src/tfs/src/tfs.c
index f78535b8ed5bd17cb232fbcbc73f9831db099547..9dc68dcdfdb73fec46bebd4d9b27e361cfc2d570 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 c4bd57760222ac3da7d25510cc2f434fe0cf0cac..442e83bb4f76499d7ce39792fc188d61536910c2 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);
       }