Re: F38 proposal: Unified Kernel Support Phase 1 (System-Wide Change proposal)

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On Thu, Dec 22, 2022 at 10:35 AM Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:
>
>   Hi,
>
> > Hmm, the updated Change is mostly okay. I disagree that you have any
> > real security benefits since all the Secure Boot stuff in Linux is
> > still in a bad place.
>
> It's a step into the right direction, but I agree, it alone doesn't
> improve the situation much.  I think we need to overthink the whole
> secure boot signing process in Fedora.  For starters we need to use
> different signing keys for UKI and non-UKI kernels, so it is possible
> (for the user if he chooses so) to disable booting non-UKI kernels to
> really plug the unsigned initrd hole.
>
> shim project planning to move from compiled-in certificates to signed
> certificates in separate files should make it easier to manage this.
>

As part of this, we *really* need to make the process for managing
supported/enabled certificates reasonable and independent of the
firmware restrictions.

> But all that is probably worth a separate change proposal and a separate
> discussion.
>
> > I would like the Change document to be updated
> > to include feedback about Secure Boot in there to further justify how
> > restricted the scope will remain for Phase 1.
> >
> > Additionally, "discoverable partitions" fixes nothing for Fedora right
> > now. There are two problems here:
> > * We don't have a discoverable subvolume specification for Btrfs
> > * Discoverable partition specification falls over dead with snapshots.
> >
> > Don't plan on using systemd-boot. I've said why before in other
> > threads, so I'm not repeating it again.
> >
> > Drop locking out modified kernel command lines. That's pretty much a
> > non-starter.
> >
> > If you want to pursue a Fedora Cloud image with UKIs, please bring it
> > up with the Cloud SIG, keeping in mind the feedback I listed.
>
> Noted.  I'll rework the Change proposal early next year, I'm almost off
> into my xmas holidays.
>

Makes sense. Have a merry Christmas and a happy new year! :)



-- 
真実はいつも一つ!/ Always, there's only one truth!
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