Re: [PATCH 6.1.y] landlock: Require LANDLOCK_ACCESS_FS_MAKE_REG for whiteout creation

["Mickaël Salaün" <mic@digikod.net>]

On Sun, Sep 06, 2026 at 09:32:50AM -0400, Sasha Levin wrote:
> > Whiteout objects are used in the upper layer of an OverlayFS to
> > indicate that the file with this name does not exist in the unified
> > view, even if it is present in one of the lower layer file systems.
> >
> > For the userspace implementations of OverlayFS (fuse-overlayfs),
> > whiteout objects can be created from userspace as well:
> 
> Queued for 6.1, thanks. Note: 6.1 is missing 49c9e09d9610 ("landlock: Fix
> handling of disconnected directories"), one of the two prerequisites this
> commit's own message names -- 6.12 and 6.6 already carry it. The whiteout
> check itself is still correct and worth having, but if a disconnected/
> bind-mounted directory is involved on 6.1 specifically the enforcement may
> not be reliable yet. Could you send 49c9e09d9610 as a follow-up for 6.1.y?

Hi Sasha,

These dependencies are indeed required to properly apply the patch, and
they are in fact fixes too (that failed to apply without changes).  I'm
preparing a few backported patches (including these dependencies) that
I'll send this week.

 Mickaël