linux-kernel - Re: [PATCH v2 2/6] powerpc/kexec_file: Add KEXEC

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] [day] [month] [year] [list]

Message-ID: <790c68ce-070d-c391-0c3a-4637c616fa5e@linux.vnet.ibm.com>
Date:   Thu, 9 Dec 2021 16:53:33 -0500
From:   Nayna <nayna@...ux.vnet.ibm.com>
To:     Michal Suchánek <msuchanek@...e.de>
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 2/6] powerpc/kexec_file: Add KEXEC_SIG support.


On 12/9/21 04:21, Michal Suchánek wrote:
> Hello,
Hi,
> On Wed, Dec 08, 2021 at 08:51:47PM -0500, Nayna wrote:
>> On 11/25/21 13:02, Michal Suchanek wrote:
>>> Copy the code from s390x
>>>
>>> Signed-off-by: Michal Suchanek<msuchanek@...e.de>
>>> ---
>>>    arch/powerpc/Kconfig        | 11 +++++++++++
>>>    arch/powerpc/kexec/elf_64.c | 36 ++++++++++++++++++++++++++++++++++++
>>>    2 files changed, 47 insertions(+)
>>>
>>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
>>> index ac0c515552fd..ecc1227a77f1 100644
>>> --- a/arch/powerpc/Kconfig
>>> +++ b/arch/powerpc/Kconfig
>>> @@ -561,6 +561,17 @@ config KEXEC_FILE
>>>    config ARCH_HAS_KEXEC_PURGATORY
>>>    	def_bool KEXEC_FILE
>>>
>>> +config KEXEC_SIG
>>> +	bool "Verify kernel signature during kexec_file_load() syscall"
>>> +	depends on KEXEC_FILE && MODULE_SIG_FORMAT
>> After manually applying the patch, the build is failing with the following
>> error:
>>
>> build failed with error "arch/powerpc/kexec/elf_64.o: In function
>> `elf64_verify_sig':
>> /root/kernel/linus/linux/arch/powerpc/kexec/elf_64.c:160: undefined
>> reference to `verify_appended_signature'"
> This patch does not add call to verify_appended_signature.
>
> Maybe you applied the following patch as well?

Yes, I tried build after applying all the patches.

Thanks & Regards,

     - Nayna