linux-kernel - Re: 2.6.37-rc7: Regression: b43: crashes in hwrng

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Message-ID: <20110105054735.GA7773@gondor.apana.org.au>
Date:	Wed, 5 Jan 2011 16:47:35 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Mario 'BitKoenig' Holbe <Mario.Holbe@...Ilmenau.DE>,
	Larry Finger <Larry.Finger@...inger.net>,
	Matt Mackall <mpm@...enic.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
	Harald Welte <HaraldWelte@...tech.com>,
	Michal Ludvig <michal@...ix.cz>
Subject: Re: 2.6.37-rc7: Regression: b43: crashes in hwrng_register()

On Wed, Jan 05, 2011 at 04:52:22AM +0100, Mario 'BitKoenig' Holbe wrote:
>
> According to the VIA PadLock Programming Guide, XSTORE increments EDI by
> the number of bytes stored.
> This did obviously not matter as long as the buffer was "sufficiently
> distant", but now you have the buffer close on the stack and I believe,
> the optimizer crops up, hence the EDI increment begins to matter.

Interesting.  So your compiler was producing incorrect output.
What version of gcc were you using?

Please attach the assembly output of the function in question.

Thanks!
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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