From e97d5f54bc3608be8dec1d2d317c18028bb63e15 Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Mon, 3 Jul 2023 12:48:21 +0000
Subject: [PATCH] fix core: Observer crash due to incorrect assessment of
 allocated buffer in deserialization of ObDynamicSamplePieceMsg.

---
 src/sql/engine/px/datahub/components/ob_dh_sample.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sql/engine/px/datahub/components/ob_dh_sample.cpp b/src/sql/engine/px/datahub/components/ob_dh_sample.cpp
index beb24a898c..b2d6560953 100644
--- a/src/sql/engine/px/datahub/components/ob_dh_sample.cpp
+++ b/src/sql/engine/px/datahub/components/ob_dh_sample.cpp
@@ -93,7 +93,7 @@ OB_DEF_DESERIALIZE(ObDynamicSamplePieceMsg)
         }
       } else {
         void *tmp_buf = arena_.alloc(sizeof(ObChunkDatumStore));
-        if (OB_ISNULL(buf)) {
+        if (OB_ISNULL(tmp_buf)) {
           ret = OB_ALLOCATE_MEMORY_FAILED;
           LOG_WARN("allocate memory failed", K(ret));
         } else {