diff --git a/fs/vfs/path_cache.c b/fs/vfs/path_cache.c
index 5cd4afb14f9c2c566bf409bb4aa4eebaaea5cb43..c76eab56d440dac086af7205b72f830940d1109c 100644
--- a/fs/vfs/path_cache.c
+++ b/fs/vfs/path_cache.c
@@ -107,7 +107,7 @@ struct PathCache *PathCacheAlloc(struct Vnode *parent, struct Vnode *vnode, cons
         return NULL;
     }
 
-    ret = strncpy_s(nc->name, pathCacheSize, name, len);
+    ret = strncpy_s(nc->name, len + 1, name, len);
     if (ret != LOS_OK) {
         return NULL;
     }