linux-kernel - Re: [PATCH 1/1] crypto: Fix data mismatch over ipsec tunnel encrypted/decrypted with ppc64le AES/GCM module.

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Message-ID: <3b3e019a-0576-4ef6-a5c7-aa5ebc35d600@linux.ibm.com>
Date: Fri, 13 Sep 2024 06:12:00 -0500
From: Danny Tsen <dtsen@...ux.ibm.com>
To: Michael Ellerman <mpe@...erman.id.au>, linux-crypto@...r.kernel.org
Cc: herbert@...dor.apana.org.au, leitao@...ian.org, nayna@...ux.ibm.com,
        appro@...ptogams.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, ltcgcw@...ux.vnet.ibm.com,
        dtsen@...ibm.com
Subject: Re: [PATCH 1/1] crypto: Fix data mismatch over ipsec tunnel
 encrypted/decrypted with ppc64le AES/GCM module.

Hi Michael,

I did think of that.  I can try to remove the feature first and apply 
the subsequent changes.

Thanks.

-Danny

On 9/12/24 10:00 PM, Michael Ellerman wrote:
> Danny Tsen <dtsen@...ux.ibm.com> writes:
>> This patch is to fix an issue when simd is not usable that data mismatch
>> may occur over ipsec tunnel. The fix is to register algs as SIMD modules
>> so that the algorithm is excecuted when SIMD instructions is usable.
>>
>> A new module rfc4106(gcm(aes)) is also added. Re-write AES/GCM assembly
>> codes with smaller footprints and small performance gain.
>>
>> This patch has been tested with the kernel crypto module tcrypt.ko and
>> has passed the selftest.  The patch is also tested with
>> CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.
>>
>> Signed-off-by: Danny Tsen <dtsen@...ux.ibm.com>
>> ---
>>   arch/powerpc/crypto/Kconfig            |    1 +
>>   arch/powerpc/crypto/aes-gcm-p10-glue.c |  141 +-
>>   arch/powerpc/crypto/aes-gcm-p10.S      | 2421 +++++++++++-------------
>>   3 files changed, 1187 insertions(+), 1376 deletions(-)
> As this is a bug fix it should have a Fixes: tag, and probably a stable
> Cc as well.
>
> But that diffstat is really large for a bug fix. Is there no way to fix
> the issue in a smaller patch? Even if that is just disabling the feature
> until it can be fixed in subsequent commits?
>
> cheers
>