diff --git a/source/libs/function/src/tpercentile.c b/source/libs/function/src/tpercentile.c
index 3ec802a7ce..8101b342a4 100644
--- a/source/libs/function/src/tpercentile.c
+++ b/source/libs/function/src/tpercentile.c
@@ -39,6 +39,7 @@ static SFilePage *loadDataFromFilePage(tMemBucket *pMemBucket, int32_t slotIdx)
   if (p != NULL) {
     pIdList = *(SArray **)p;
   } else {
+    taosMemoryFree(buffer);
     return NULL;
   }
 
@@ -48,6 +49,7 @@ static SFilePage *loadDataFromFilePage(tMemBucket *pMemBucket, int32_t slotIdx)
 
     SFilePage *pg = getBufPage(pMemBucket->pBuffer, *pageId);
     if (pg == NULL) {
+      taosMemoryFree(buffer);
       return NULL;
     }