diff --git a/src/util/src/tlist.c b/src/util/src/tlist.c
index f11a5481f6b5a130b69f9ea352323b70f4a6de07..8844a5f787c1923310ac71a30cc39594ed7f04f8 100644
--- a/src/util/src/tlist.c
+++ b/src/util/src/tlist.c
@@ -24,7 +24,7 @@ SList *tdListNew(int eleSize) {
   list->eleSize = eleSize;
   list->numOfEles = 0;
   list->head = list->tail = NULL;
-  return NULL;
+  return list;
 }
 
 void tdListEmpty(SList *list) {
@@ -135,7 +135,7 @@ SListNode *tdListPopNode(SList *list, SListNode *node) {
   return node;
 }
 
-void tdListNodeGetData(SList *list, SListNode *node, void *target) { memcpy(node->data, target, list->eleSize); }
+void tdListNodeGetData(SList *list, SListNode *node, void *target) { memcpy(target, node->data, list->eleSize); }
 
 void tdListInitIter(SList *list, SListIter *pIter, TD_LIST_DIRECTION_T direction) {
   pIter->direction = direction;
diff --git a/src/vnode/tsdb/src/tsdbCache.c b/src/vnode/tsdb/src/tsdbCache.c
index 4baedf55a332f6ff063b8c2fe224a23c872c0927..56ec040daf323498c3c8b2416da8f5d40a5e77dc 100644
--- a/src/vnode/tsdb/src/tsdbCache.c
+++ b/src/vnode/tsdb/src/tsdbCache.c
@@ -23,6 +23,8 @@ STsdbCache *tsdbInitCache(int maxBytes, int cacheBlockSize) {
   STsdbCache *pCache = (STsdbCache *)calloc(1, sizeof(STsdbCache));
   if (pCache == NULL) return NULL;
 
+  if (cacheBlockSize < 0) cacheBlockSize = TSDB_DEFAULT_CACHE_BLOCK_SIZE;
+
   pCache->maxBytes = maxBytes;
   pCache->cacheBlockSize = cacheBlockSize;
 
@@ -83,6 +85,7 @@ void *tsdbAllocFromCache(STsdbCache *pCache, int bytes) {
   void *ptr = (void *)(pCache->curBlock->data + pCache->curBlock->offset);
   pCache->curBlock->offset += bytes;
   pCache->curBlock->remain -= bytes;
+  memset(ptr, 0, bytes);
 
   return ptr;
 }