From 9c9d57c961c655599f340a4618a2840883b09a57 Mon Sep 17 00:00:00 2001
From: Li Minghao <castermode@gmail.com>
Date: Sat, 23 Apr 2022 22:38:49 -0700
Subject: [PATCH] fix bug, syncEnv free NULL

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

diff --git a/source/libs/sync/src/syncEnv.c b/source/libs/sync/src/syncEnv.c
index 0e04793a83..8f7a717e00 100644
--- a/source/libs/sync/src/syncEnv.c
+++ b/source/libs/sync/src/syncEnv.c
@@ -91,8 +91,10 @@ static SSyncEnv *doSyncEnvStart() {
 }
 
 static int32_t doSyncEnvStop(SSyncEnv *pSyncEnv) {
-  taosTmrCleanUp(pSyncEnv->pTimerManager);
-  taosMemoryFree(pSyncEnv);
+  if (pSyncEnv != NULL) {
+    taosTmrCleanUp(pSyncEnv->pTimerManager);
+    taosMemoryFree(pSyncEnv);
+  }
   return 0;
 }