From: "Daniel P. Smith" <dpsmith@apertussolutions.com>
To: The development of GNU GRUB <grub-devel@gnu.org>,
Brendan Trotter <btrotter@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Daniel Kiper <daniel.kiper@oracle.com>,
Alec Brown <alec.r.brown@oracle.com>,
Kanth Ghatraju <kanth.ghatraju@oracle.com>,
Ross Philipson <ross.philipson@oracle.com>,
"piotr.krol@3mdeb.com" <piotr.krol@3mdeb.com>,
"krystian.hebel@3mdeb.com" <krystian.hebel@3mdeb.com>,
"persaur@gmail.com" <persaur@gmail.com>,
"Yoder, Stuart" <stuart.yoder@arm.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"michal.zygowski@3mdeb.com" <michal.zygowski@3mdeb.com>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
"lukasz@hawrylko.pl" <lukasz@hawrylko.pl>,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
James Morris <jmorris@namei.org>
Subject: Re: Linux DRTM on UEFI platforms
Date: Thu, 7 Jul 2022 05:46:40 -0400 [thread overview]
Message-ID: <b1e7b545-8e66-5dc0-ff5a-9f69d1751a5f@apertussolutions.com> (raw)
In-Reply-To: <CAELHeEfZ-feZnexp7Gx3VAJPerENcoO1Uccbe3xxUX95jvLUdA@mail.gmail.com>
On 7/5/22 20:03, Brendan Trotter wrote:
> Hi,
Greetings!
Not sure why I got dropped from distro, but no worries.
> On Wed, Jul 6, 2022 at 4:52 AM Daniel P. Smith
> <dpsmith@apertussolutions.com> wrote:
>> On 6/10/22 12:40, Ard Biesheuvel wrote:> On Thu, 19 May 2022 at 22:59,
>> To help provide clarity, consider the following flows for comparison,
>>
>> Normal/existing efi-stub:
>> EFI -> efi-stub -> head_64.S
>>
>> Proposed secure launch:
>> EFI -> efi-stub -> dl-handler -> [cpu] -> sl_stub ->head_64.S
>
> For more clarity; the entire point is to ensure that the kernel only
> has to trust itself and the CPU/TPM hardware (and does not have to
> trust a potentially malicious boot loader)..Any attempt to avoid a
> one-off solution for Linux is an attempt to weaken security.
Please elaborate so I might understand how this entrypoint allows for
the kernel to only trust itself and the CPU/TPM.
> The only correct approach is "efi-stub -> head_64.S -> kernel's own
> secure init"; where (on UEFI systems) neither GRUB nor Trenchboot has
> a valid reason to exist and should never be installed.
>
>
> Cheers,
>
> Brendan
v/r,
dps
next prev parent reply other threads:[~2022-07-07 9:48 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-29 17:40 Linux DRTM on UEFI platforms Matthew Garrett
2022-03-30 7:02 ` Ard Biesheuvel
2022-03-30 7:11 ` Matthew Garrett
2022-03-30 7:12 ` Ard Biesheuvel
2022-03-30 7:18 ` Matthew Garrett
2022-03-30 7:23 ` Ard Biesheuvel
2022-03-30 7:27 ` Matthew Garrett
2022-03-30 7:39 ` Ard Biesheuvel
2022-03-30 12:46 ` James Bottomley
2022-03-31 0:35 ` Daniel P. Smith
2022-03-31 7:13 ` Ard Biesheuvel
2022-03-31 10:59 ` Heinrich Schuchardt
2022-05-19 20:57 ` Daniel P. Smith
2022-05-19 20:57 ` Daniel P. Smith
2022-06-10 16:40 ` Ard Biesheuvel
2022-07-05 18:35 ` Daniel P. Smith
2022-07-06 0:03 ` Brendan Trotter
2022-07-06 0:12 ` Matthew Garrett
2022-07-07 9:46 ` Daniel P. Smith [this message]
2022-07-08 3:36 ` Brendan Trotter
2022-07-08 4:56 ` Matthew Garrett
2022-07-22 17:23 ` Daniel P. Smith
2022-07-23 5:15 ` Brendan Trotter
2022-08-09 10:53 ` Daniel P. Smith
2022-08-10 9:07 ` Brendan Trotter
2022-08-10 17:46 ` Matthew Garrett
2022-08-11 9:55 ` Brendan Trotter
2022-08-11 11:34 ` Daniel Kiper
2022-08-11 18:25 ` Matthew Garrett
2022-08-12 3:22 ` Brendan Trotter
2022-08-12 5:54 ` Matthew Garrett
2022-08-05 12:53 ` Ard Biesheuvel
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