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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Luis Chamberlain <mcgrof@kernel.org>,
        Michal Suchanek <msuchanek@suse.de>,
        David Howells <dhowells@redhat.com>,
        Aaron Tomlin <atomlin@redhat.com>
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        linux-security-module@vger.kernel.org
Subject: Re: [PATCH v5 0/6] KEXEC_SIG with appended signature
In-Reply-To: <YfBd/EDGUx9UIHcb@bombadil.infradead.org>
References: <cover.1641900831.git.msuchanek@suse.de>
 <YfBd/EDGUx9UIHcb@bombadil.infradead.org>
Date:   Wed, 09 Feb 2022 15:46:05 +1100
Message-ID: <87pmnwlkaa.fsf@mpe.ellerman.id.au>
MIME-Version: 1.0
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Luis Chamberlain <mcgrof@kernel.org> writes:
> On Tue, Jan 11, 2022 at 12:37:42PM +0100, Michal Suchanek wrote:
>> Hello,
>> 
>> This is a refresh of the KEXEC_SIG series.
>> 
>> This adds KEXEC_SIG support on powerpc and deduplicates the code dealing
>> with appended signatures in the kernel.
>> 
>> powerpc supports IMA_KEXEC but that's an exception rather than the norm.
>> On the other hand, KEXEC_SIG is portable across platforms.
>> 
>> For distributions to have uniform security features across platforms one
>> option should be used on all platforms.
>> 
>> Thanks
>> 
>> Michal
>> 
>> Previous revision: https://lore.kernel.org/linuxppc-dev/cover.1637862358.git.msuchanek@suse.de/
>> Patched kernel tree: https://github.com/hramrach/kernel/tree/kexec_sig
>> 
>> Michal Suchanek (6):
>>   s390/kexec_file: Don't opencode appended signature check.
>>   powerpc/kexec_file: Add KEXEC_SIG support.
>>   kexec_file: Don't opencode appended signature verification.
>>   module: strip the signature marker in the verification function.
>>   module: Use key_being_used_for for log messages in
>>     verify_appended_signature
>>   module: Move duplicate mod_check_sig users code to mod_parse_sig
>
> What tree should this go through? I'd prefer if over through modules
> tree as it can give a chance for Aaron Tomlin to work with this for his
> code refactoring of kernel/module*.c to kernel/module/

Yeah that's fine by me, the arch changes are pretty minimal and unlikely
to conflict much.

cheers