Re: [PATCH 05/27] kexec: Disable at runtime if the kernel is locked down

[James Morris]

On Thu, 19 Oct 2017, David Howells wrote:

> From: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
> 
> kexec permits the loading and execution of arbitrary code in ring 0, which
> is something that lock-down is meant to prevent. It makes sense to disable
> kexec in this situation.
> 
> This does not affect kexec_file_load() which can check for a signature on the
> image to be booted.
> 
> Signed-off-by: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
> Acked-by: Dave Young <dyoung@xxxxxxxxxx>
> cc: kexec@xxxxxxxxxxxxxxxxxxx


Reviewed-by: James Morris <james.l.morris@xxxxxxxxxx>

-- 
James Morris
<james.l.morris@xxxxxxxxxx>