diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index c5496cffb0..a268a3547a 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -6924,7 +6924,9 @@ void tDestroySVCreateTbReq(SVCreateTbReq *pReq, int32_t flags) {
     }
   }
 
-  taosMemoryFree(pReq->sql);
+  if(pReq->sql != NULL){
+    taosMemoryFree(pReq->sql);
+  }
   pReq->sql = NULL;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index e9abacfb61..bafc060331 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -694,10 +694,12 @@ static int32_t mndProcessDropTopicReq(SRpcMsg *pReq) {
   if (pTopic == NULL) {
     if (dropReq.igNotExists) {
       mInfo("topic:%s, not exist, ignore not exist is set", dropReq.name);
+      tFreeSMDropTopicReq(&dropReq);
       return 0;
     } else {
       terrno = TSDB_CODE_MND_TOPIC_NOT_EXIST;
       mError("topic:%s, failed to drop since %s", dropReq.name, terrstr());
+      tFreeSMDropTopicReq(&dropReq);
       return -1;
     }
   }