On Mon, Apr 11, 2022 at 09:13:32AM +0800, Baoquan He wrote:
On 04/08/22 at 10:59am, Michal Suchánek wrote:
On Fri, Apr 08, 2022 at 03:17:19PM +0800, Baoquan He wrote:
> Hi Coiby,
>
> On 04/01/22 at 09:31am, Coiby Xu wrote:
> > Currently, a problem faced by arm64 is if a kernel image is signed by a
> > MOK key, loading it via the kexec_file_load() system call would be
> > rejected with the error "Lockdown: kexec: kexec of unsigned images is
> > restricted; see man kernel_lockdown.7".
> >
> > This patch set allows arm64 to use more system keyrings to verify kdump
> > kernel image signature by making the existing code in x64 public.
>
> Thanks for updating. It would be great to tell why the problem is
> met, then allow arm64 to use more system keyrings can solve it.
The reason is that MOK keys are (if anywhere) linked to the secondary
^^^^^^^^^
platform?
keyring, and only primary keyring is used on arm64.
Thanks Michal for providing the info! Btw, I think you made a typo
because MOK keys are linked to the platform keyring, right?
Thanks for explaining. This is valuable information and should
be put into log for better understanding when reviewing or
reading code later.
Thanks for the reminder! I'll include this info in the commit message.
--
Best regards,
Coiby
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