linux-kernel - Re: [dm-devel] [PATCH v2 10/11] crypto: ahash: Remove VLA usage for AHASH_REQUEST_ON

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Message-ID: <20180627143453.gu44ghqh6jnaf4tz@gondor.apana.org.au>
Date:   Wed, 27 Jun 2018 22:34:53 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Kees Cook <keescook@...omium.org>
Cc:     Eric Biggers <ebiggers3@...il.com>,
        Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Eric Biggers <ebiggers@...gle.com>,
        Mike Snitzer <snitzer@...hat.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        qat-linux@...el.com, LKML <linux-kernel@...r.kernel.org>,
        dm-devel@...hat.com, linux-crypto <linux-crypto@...r.kernel.org>,
        Lars Persson <larper@...s.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        "David S. Miller" <davem@...emloft.net>,
        Alasdair Kergon <agk@...hat.com>,
        Rabin Vincent <rabinv@...s.com>
Subject: Re: [dm-devel] [PATCH v2 10/11] crypto: ahash: Remove VLA usage for
 AHASH_REQUEST_ON_STACK

On Tue, Jun 26, 2018 at 10:02:31AM -0700, Kees Cook wrote:
>
> There is no SHASH_MAX_REQSIZE?
> 
> As for users of AHASH_REQUEST_ON_STACK, I see:

These users are only using the top-level ahash interface.  The
underlying algorithms must all be shas.

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