From 5d20804e7670e5e55fce774ced1018665dc7969a Mon Sep 17 00:00:00 2001
From: Liu Jicong <liujicong@qq.com>
Date: Wed, 20 Jul 2022 17:10:41 +0800
Subject: [PATCH] fix(wal): use after free

---
 source/libs/wal/src/walMeta.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/libs/wal/src/walMeta.c b/source/libs/wal/src/walMeta.c
index 4bb6f07a47..a5fd3fca35 100644
--- a/source/libs/wal/src/walMeta.c
+++ b/source/libs/wal/src/walMeta.c
@@ -126,10 +126,11 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal) {
     return -1;
   }
   SWalCkHead* lastEntry = (SWalCkHead*)found;
+  int64_t     retVer = lastEntry->head.version;
   taosCloseFile(&pFile);
   taosMemoryFree(buf);
 
-  return lastEntry->head.version;
+  return retVer;
 }
 
 int walCheckAndRepairMeta(SWal* pWal) {