From 948fa60ef0532fa94d8ff5de54e78a33ddcf2bcb Mon Sep 17 00:00:00 2001
From: Benguang Zhao <bgzhao@taosdata.com>
Date: Sun, 9 Oct 2022 11:52:06 +0800
Subject: [PATCH] fix: check the length of remaining content for computing
 CRC32 chksum of WAL record body

---
 source/libs/wal/src/walMeta.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/source/libs/wal/src/walMeta.c b/source/libs/wal/src/walMeta.c
index 7cc92c46e9..7bf707a8ef 100644
--- a/source/libs/wal/src/walMeta.c
+++ b/source/libs/wal/src/walMeta.c
@@ -94,8 +94,10 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal) {
           break;
       }
       SWalCkHead* logContent = (SWalCkHead*)candidate;
-      if (walValidHeadCksum(logContent) == 0 && walValidBodyCksum(logContent) == 0) {
-        found = candidate;
+      if (walValidHeadCksum(logContent) == 0 &&
+          walCkHeadSz + logContent->head.bodyLen <= len &&
+          walValidBodyCksum(logContent) == 0) {
+            found = candidate;
       }
       haystack = candidate + 1;
     }