On Пан, 07 кас 2024, Zdenek Pytela wrote:
On Mon, Oct 7, 2024 at 12:36 PM Alexander Bokovoy <abokovoy@xxxxxxxxxx>
wrote:
On Няд, 06 кас 2024, Zbigniew Jędrzejewski-Szmek wrote:
>On Sat, Oct 05, 2024 at 10:53:16AM +0300, Alexander Bokovoy wrote:
>> Can we move systemd-homed configuration and activation into something
>> that could be explicitly enabled by the administrators? Whether this is
>> done during installation or post, it still would need to be a concious
>> step made by admins.
>
>It can be enabled and disabled. Nevertheless, having it enabled seems
>to e a good default. If there are no homed users defined, it should
>just hang in the background doing nothing. (Though maybe it could exit
>after being started. I'll try to look into this.)
>
>Any SELinux denials will have to be fixed anyway. So this is not an
>argument for disabling it.
Sure, it does need to be fixed. However, I think it is a signal that
systemd-homed is not really in use across Fedora community. The original
SELinux issue was opened in 2021, against Fedora 35:
https://bugzilla.redhat.com/show_bug.cgi?id=2036108
Since that time multiple people tried to get SELinux policy developed
and merged upstream and none happened until we re-raised its importance
from OpenQA failures for FreeIPA. So SELinux policy changes would come
but this is not enough.
A question was raised in 2023 by mattdm about systemd-homed support of
SELinux on newly created homes as somebody commented that systemd-homed
does not support proper labeling of the homes:
https://github.com/fedora-selinux/selinux-policy/pull/939#issuecomment-1409217811
No follow up happened on that, sadly.
I do not see any work done on that yet. Without having SELinux support
properly integrated, I think enabling systemd-homed by default is
premature.
Actually selinux-policy has support for systemd-homed in F41 and F42 since
Sep 24th.
Thanks, though this is about the first part (selinux-policy allowing
systemd-homed to access its own default home directory), while the
github comment talks about drives that systemd-homed creates for user
homes. That part needs to be addressed in systemd-homed, if I understand
correctly, pretty much like we address labeling of auto-created home
directories in oddjob.
--
/ Alexander Bokovoy
Sr. Principal Software Engineer
Security / Identity Management Engineering
Red Hat Limited, Finland
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