linux-kernel - Re: HMAC broken on s390

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Message-ID: <20071203220900.GA8573@gondor.apana.org.au>
Date:	Tue, 4 Dec 2007 09:09:00 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jan Glauber <jang@...ux.vnet.ibm.com>
Cc:	linux-crypto <linux-crypto@...r.kernel.org>,
	Jens Axboe <axboe@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: HMAC broken on s390

On Mon, Dec 03, 2007 at 02:31:40PM +0100, Jan Glauber wrote:
> Hi Herbert,
> 
> commit 788fefa33b0b50581585925c53c230a36af35d0e in cryptodev breaks hmac
> on s390 du to the usage of sg_chain():
> 
> static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
>                             struct scatterlist *sgl)
> {
> #ifndef ARCH_HAS_SG_CHAIN
>         BUG();
> #endif
> 
> ARCH_HAS_SG_CHAIN is false for s390 (and also for some other arch's).
> 
> What should we do with this?

Looks like we took a step backwards because the chaining I had
before worked on all architectures :)

I suppose either we'll have to do our own chaining again or implement
it for all architectures.  I'll look into this.

Thanks,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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