Re: [PATCH] x86: Lock down MSR writing in secure boot

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Feb 8, 2013 at 5:29 PM, Matthew Garrett
<matthew.garrett@xxxxxxxxxx> wrote:
> On Fri, 2013-02-08 at 17:22 -0800, H. Peter Anvin wrote:
>
>> You don't have to build the kernel twice to exclude a loadable module.
>
> I guess you could just strip the signatures off any modules you don't
> want to support under Secure Boot, but that breaks some other use cases.

Also, _reading_ MSRs from userspace arguably has utility that doesn't
compromise ring-0. So excluding the driver entirely seems like
overkill.

-Kees

--
Kees Cook
Chrome OS Security
--
To unsubscribe from this list: send the line "unsubscribe linux-efi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux