diff --git a/source/dnode/mnode/impl/src/mndMnode.c b/source/dnode/mnode/impl/src/mndMnode.c
index 37378cd8cd..b7d7358110 100644
--- a/source/dnode/mnode/impl/src/mndMnode.c
+++ b/source/dnode/mnode/impl/src/mndMnode.c
@@ -625,7 +625,7 @@ static int32_t mndRetrieveMnodes(SNodeMsg *pReq, SShowObj *pShow, SSDataBlock *p
     colDataAppend(pColInfo, numOfRows, b1, false);
 
     const char *roles = syncStr(pObj->role);
-    char       *b2 = taosMemoryCalloc(1, strlen(roles) + 1 + VARSTR_HEADER_SIZE);
+    char       *b2 = taosMemoryCalloc(1, 12 + VARSTR_HEADER_SIZE);
     STR_WITH_MAXSIZE_TO_VARSTR(b2, roles, pShow->pMeta->pSchemas[cols].bytes);
 
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
diff --git a/source/dnode/vnode/src/vnd/vnodeCommit.c b/source/dnode/vnode/src/vnd/vnodeCommit.c
index 1c0e65aa95..39ab9a4580 100644
--- a/source/dnode/vnode/src/vnd/vnodeCommit.c
+++ b/source/dnode/vnode/src/vnd/vnodeCommit.c
@@ -190,7 +190,7 @@ int vnodeSyncCommit(SVnode *pVnode) {
 }
 
 int vnodeCommit(SVnode *pVnode) {
-  SVnodeInfo info;
+  SVnodeInfo info = {0};
   char       dir[TSDB_FILENAME_LEN];
 
   vInfo("vgId:%d start to commit, version: %" PRId64, TD_VID(pVnode), pVnode->state.applied);