linux-kernel - Re: [PATCH 4/4] module, KEYS: Make use of platform keyring for signature verification

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Message-ID: <3e39412657a4b0839bcf38544d591959e89877b8.camel@linux.ibm.com>
Date:   Tue, 15 Feb 2022 15:08:18 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Michal Suchanek <msuchanek@...e.de>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Philipp Rudo <prudo@...hat.com>, Baoquan He <bhe@...hat.com>,
        Alexander Egorenkov <egorenar@...ux.ibm.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        James Morse <james.morse@....com>,
        Dave Young <dyoung@...hat.com>,
        Kairui Song <kasong@...hat.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-modules@...r.kernel.org,
        keyrings@...r.kernel.org, linux-security-module@...r.kernel.org,
        stable@...nel.org, Eric Snowberg <eric.snowberg@...cle.com>
Subject: Re: [PATCH 4/4] module, KEYS: Make use of platform keyring for
 signature verification

[Cc'ing Eric Snowberg]

Hi Michal,

On Tue, 2022-02-15 at 20:39 +0100, Michal Suchanek wrote:
> Commit 278311e417be ("kexec, KEYS: Make use of platform keyring for signature verify")
> adds support for use of platform keyring in kexec verification but
> support for modules is missing.
> 
> Add support for verification of modules with keys from platform keyring
> as well.

Permission for loading the pre-OS keys onto the "platform" keyring and
using them is limited to verifying the kexec kernel image, nothing
else.

FYI, Eric Snowberg's initial patch set titled "[PATCH v10 0/8] Enroll
kernel keys thru MOK" is queued in Jarkko's git repo to be usptreamed. 
A subsequent patch set is expected.

-- 
thanks,

Mimi

[1] Message-Id: <20211124044124.998170-11-eric.snowberg@...cle.com>