linux-kernel - Re: [PATCH v5 4/6] module: strip the signature marker in the verification function.

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Date:   Tue, 25 Jan 2022 12:23:51 -0800
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Michal Suchanek <msuchanek@...e.de>,
        David Howells <dhowells@...hat.com>
Cc:     keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-integrity@...r.kernel.org, kexec@...ts.infradead.org,
        Philipp Rudo <prudo@...hat.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Nayna <nayna@...ux.vnet.ibm.com>, Rob Herring <robh@...nel.org>,
        linux-s390@...r.kernel.org, Vasily Gorbik <gor@...ux.ibm.com>,
        Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Jessica Yu <jeyu@...nel.org>, linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Paul Mackerras <paulus@...ba.org>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Frank van der Linden <fllinden@...zon.com>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Daniel Axtens <dja@...ens.net>, buendgen@...ibm.com,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Baoquan He <bhe@...hat.com>,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v5 4/6] module: strip the signature marker in the
 verification function.

On Tue, Jan 11, 2022 at 12:37:46PM +0100, Michal Suchanek wrote:
> It is stripped by each caller separately.
> 
> Note: this changes the error for kexec_file from EKEYREJECTED to ENODATA
> when the signature marker is missing.
> 
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> ---
> v3: - Philipp Rudo <prudo@...hat.com>: Update the commit with note about
>       change of raturn value
>     - the module_signature.h is now no longer needed for kexec_file

Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>

  Luis