linux-kernel - Re: [bug] crypto/vmx/p8_ghash memory corruption in 4.8-rc7

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Message-ID: <20160927030826.GB8579@gondor.apana.org.au>
Date:   Tue, 27 Sep 2016 11:08:26 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Marcelo Cerri <marcelo.cerri@...onical.com>
Cc:     Jan Stancek <jstancek@...hat.com>, rui.y.wang@...el.com,
        mhcerri@...ux.vnet.ibm.com, leosilva@...ux.vnet.ibm.com,
        pfsmorigo@...ux.vnet.ibm.com, linux-crypto@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [bug] crypto/vmx/p8_ghash memory corruption in 4.8-rc7

On Mon, Sep 26, 2016 at 02:43:17PM -0300, Marcelo Cerri wrote:
> 
> Wouldn't be enough to provide a pair of import/export functions as the
> padlock-sha driver does?

I don't think that will help as ultimately you need to call the
export function on the fallback and that's what requires the extra
memory.  In fact very operation involving the fallback will need
that extra memory too.

Cheers,
-- 
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