Re: [PATCH] vfs: move_mount: reject moving kernel internal mounts

Al Viro
2019-06-29T20:39:20Z

On Sat, Jun 29, 2019 at 01:27:44PM -0700, Eric Biggers wrote:

> @@ -2600,7 +2600,7 @@ static int do_move_mount(struct path *old_path, struct path *new_path)
> if (attached && !check_mnt(old))
> goto out;
>
> - if (!attached && !(ns && is_anon_ns(ns)))
> + if (!attached && !(ns && ns != MNT_NS_INTERNAL && is_anon_ns(ns)))
> goto out;
>
> if (old->mnt.mnt_flags & MNT_LOCKED)

*UGH*

Applied, but that code is getting really ugly ;-/