Re: [PATCH v1 2/5] selftests/landlock: Fix FS tests when run on a private mount point

Mickaël Salaün
2024-04-29T12:39:18Z

On Fri, Apr 26, 2024 at 12:38:17PM -0700, Kees Cook wrote:
> On Fri, Apr 26, 2024 at 07:22:49PM +0200, Mickaël Salaün wrote:
> > According to the test environment, the mount point of the test's working
> > directory may be shared or not, which changes the visibility of the
> > nested "tmp" mount point for the test's parent process calling
> > umount("tmp").
> >
> > This was spotted while running tests on different Linux distributions,
> > with different mount point configurations.
>
> Which distros did what?

Actually it's not related to distros, but rather container runtime
(Docker) vs. non-container environment. With Docker (at least on my
environment) all mount points are private, which is not the case (by
default) when running the same UML environment not in a container. See
https://github.com/landlock-lsm/landlock-test-tools/pull/4

I'll update the description.