1 files changed, 7 insertions, 0 deletions
diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index 86ef809fbf..fe0020b277 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -153,6 +153,13 @@ struct dfs_fd *fd_get(int fd)
     dfs_lock();
     d = &fd_table[fd];
 
+    /* check dfs_fd valid or not */
+    if (d->path == RT_NULL || d->fs == RT_NULL)
+	{
+        dfs_unlock();
+        return RT_NULL;
+	}
+
     /* increase the reference count */
     d->ref_count ++;
     dfs_unlock();