Multibooting UX, how well it ought to work

[Matthew Garrett]

On Mon, Jun 30, 2014 at 10:35:17PM -0600, Chris Murphy wrote:
> 
> On Jun 30, 2014, at 4:20 PM, Matthew Garrett <mjg59 at srcf.ucam.org> wrote:
> 
> > On Mon, Jun 30, 2014 at 03:09:01PM -0600, Chris Murphy wrote:
> > 
> >> Ok for long term. In the next two weeks before freeze is it possible 
> >> to modify the grub2-efi package spec file GRUB_MODULES= so that the 
> >> grux64.efi has xnu, xnu_uuid, xnu_uuid_test modules baked in? That 
> >> would fix the main problem in bug 893179 so that the first two OS X 
> >> entries would then have a chance of working.
> > 
> > Not unless somebody writes signature checking support for them, no.
> 
> Ahh. So without that, it'd be possible to execute arbitrary code masquerading as xnu on a Secure Boot system?

Yeah. One option would be to just disable the code if secure boot is 
enabled - Macs don't implement it, so that would be fine for basically 
every real world case. But I'd still prefer to chain the Apple 
bootloader rather than fiddling with XNU.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org