linux-kernel - Re: [PATCH 10/11] acpi: Ignore acpi_rsdp kernel parameter in a secure boot environment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAKocOOOMevXWCPgAddo4scC+GY+emw67XxC3vFnOtJM81QxkTA@mail.gmail.com>
Date:	Tue, 4 Sep 2012 10:44:59 -0600
From:	Shuah Khan <shuahkhan@...il.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org,
	Josh Boyer <jwboyer@...hat.com>
Subject: Re: [PATCH 10/11] acpi: Ignore acpi_rsdp kernel parameter in a secure
 boot environment

On Tue, Sep 4, 2012 at 10:38 AM, Matthew Garrett <mjg@...hat.com> wrote:
> On Tue, Sep 04, 2012 at 10:30:46AM -0600, Shuah Khan wrote:
>> On Tue, Sep 4, 2012 at 9:55 AM, Matthew Garrett <mjg@...hat.com> wrote:
>> > From: Josh Boyer <jwboyer@...hat.com>
>> >
>> > This option allows userspace to pass the RSDP address to the kernel.  This
>> > could potentially be used to circumvent the secure boot trust model.
>> > We ignore the setting if we don't have the CAP_SECURE_FIRMWARE capability.
>>
>> Does this mean, acpi_rsdp is disabled on all current platforms that
>> don't support CAP_SECURE_FIRMWARE?
>
> No, if you're not using secure boot then you'll have
> CAP_SECURE_FIRMWARE.

Gotta say this capability name is confusing. Naming is
CAP_PRE_SECURE_BOOT or something along the lines might be a better
choice. When I just look at this name, I sure thought this
CAP_SECURE_FIRMWARE true means it is a secure boot capable firmware.

-- Shuah
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/