Re: [PATCH 0/3] KEXEC_SIG with appended signature

Michal Suchánek
2021-11-05T13:14:23Z

On Fri, Nov 05, 2021 at 09:55:52PM +1100, Daniel Axtens wrote:
> Michal Suchanek <msuchanek@suse.de> writes:
>
> > S390 uses appended signature for kernel but implements the check
> > separately from module loader.
> >
> > Support for secure boot on powerpc with appended signature is planned -
> > grub patches submitted upstream but not yet merged.
>
> Power Non-Virtualised / OpenPower already supports secure boot via kexec
> with signature verification via IMA. I think you have now sent a
> follow-up series that merges some of the IMA implementation, I just
> wanted to make sure it was clear that we actually already have support

So is IMA_KEXEC and KEXEC_SIG redundant?

I see some architectures have both. I also see there is a lot of overlap
between the IMA framework and the KEXEC_SIG and MODULE_SIg.

Thanks

Michal