linux-kernel - Re: [Patch V2] crypto: x86/sha1 : Fix reads beyond the number of blocks passed

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Message-ID: <20170802022944.GA4237@gondor.apana.org.au>
Date:   Wed, 2 Aug 2017 10:29:45 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Megha Dey <megha.dey@...ux.intel.com>
Cc:     tim.c.chen@...ux.intel.com, davem@...emloft.net,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        jstancek@...hat.com, ilya.albrekht@...el.com, megha.dey@...el.com
Subject: Re: [Patch V2] crypto: x86/sha1 : Fix reads beyond the number of
 blocks passed

On Tue, Aug 01, 2017 at 05:38:32PM -0700, Megha Dey wrote:
> It was reported that the sha1 AVX2 function(sha1_transform_avx2) is
> reading ahead beyond its intended data, and causing a crash if the next
> block is beyond page boundary:
> http://marc.info/?l=linux-crypto-vger&m=149373371023377
> 
> This patch makes sure that there is no overflow for any buffer length.
> 
> It passes the tests written by Jan Stancek that revealed this problem:
> https://github.com/jstancek/sha1-avx2-crash
> 
> Jan, can you verify this fix?
> Herbert, can you re-enable sha1-avx2 once Jan has checked it out and
> revert commit b82ce24426a4071da9529d726057e4e642948667 ?

Can you please include the hunk to actually reenable sha1-avx2
in your patch? Thanks!
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt