linux-kernel - Re: [PATCH v2 0/6] KEXEC_SIG with appended signature

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]

Date:   Thu, 9 Dec 2021 15:57:44 +0100
From:   Michal Suchánek <msuchanek@...e.de>
To:     Nayna <nayna@...ux.vnet.ibm.com>
Cc:     keyrings@...r.kernel.org, kexec@...ts.infradead.org,
        Philipp Rudo <prudo@...hat.com>,
        Mimi Zohar <zohar@...ux.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,
        David Howells <dhowells@...hat.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        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-crypto@...r.kernel.org,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v2 0/6] KEXEC_SIG with appended signature

Hello,

On Wed, Dec 08, 2021 at 08:50:54PM -0500, Nayna wrote:
> 
> On 11/25/21 13:02, Michal Suchanek wrote:
> > Hello,
> 
> Hi Michael,
> 
> > 
> > This is resend of the KEXEC_SIG patchset.
> > 
> > The first patch is new because it'a a cleanup that does not require any
> > change to the module verification code.
> > 
> > The second patch is the only one that is intended to change any
> > functionality.
> > 
> > The rest only deduplicates code but I did not receive any review on that
> > part so I don't know if it's desirable as implemented.
> > 
> > The first two patches can be applied separately without the rest.
> 
> Patch 2 fails to apply on v5.16-rc4. Can you please also include git
> tree/branch while posting the patches ?

Sorry, I did not have a clean base and the Kconfig had another change.

Here is a tree with the changes applied:
https://github.com/hramrach/kernel/tree/kexec_sig

> 
> Secondly, I see that you add the powerpc support in Patch 2 and then modify
> it again in Patch 5 after cleanup. Why not add the support for powerpc after
> the clean up ? This will reduce some rework and also probably simplify
> patches.

That's because I don't know if the later patches will be accepted. By
queueing this patch first it can be applied standalone to ppc tree
without regard for the other patches. It's a copy of the s390 code so it
needs the same rework - not really adding complexity.

Thanks

Michal