diff --git a/lab5/user/lab5/apps/init.c b/lab5/user/lab5/apps/init.c
index dd83e0e..acfa870 100644
--- a/lab5/user/lab5/apps/init.c
+++ b/lab5/user/lab5/apps/init.c
@@ -223,7 +223,6 @@ int fs_read_all(char *path, void **ret_buf)
     *ret_buf = buf;
 
     // 读入文件
-    // FIXME: 读取 1 页以上会遇到 warning: vmr overlap
     int pos = 0;
     while (size - pos > 0) {
         int cur = fs_read(path, pos, PAGE_SIZE);
diff --git a/lab5/user/lab5/tmpfs/tmpfs_main.c b/lab5/user/lab5/tmpfs/tmpfs_main.c
index 995cb13..4ad73f6 100644
--- a/lab5/user/lab5/tmpfs/tmpfs_main.c
+++ b/lab5/user/lab5/tmpfs/tmpfs_main.c
@@ -52,6 +52,7 @@ static void fs_dispatch(ipc_msg_t * ipc_msg)
                     break;
                 }
                 ret = fs_server_write(fr->path, fr->offset, fr->buff, fr->count);
+                usys_unmap_pmo(SELF_CAP, cap, (u64) fr->buff);
 				break;
 			}
 		case FS_REQ_READ:{
@@ -61,6 +62,7 @@ static void fs_dispatch(ipc_msg_t * ipc_msg)
                     break;
                 }
                 ret = fs_server_read(fr->path, fr->offset, fr->buff, fr->count);
+                usys_unmap_pmo(SELF_CAP, cap, (u64) fr->buff);
 				break;
 			}
 		case FS_REQ_GET_SIZE:{