linux-kernel - Re: [PATCH 6/8] x86, microcode, intel: total_size is valid only when data

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Message-ID: <20140728142640.GB5350@pd.tnic>
Date:	Mon, 28 Jul 2014 16:26:40 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	linux-kernel@...r.kernel.org, H Peter Anvin <hpa@...or.com>
Subject: Re: [PATCH 6/8] x86, microcode, intel: total_size is valid only when
 data_size != 0

On Fri, Jul 25, 2014 at 04:04:11PM -0300, Henrique de Moraes Holschuh wrote:
> As far as I can tell, Intel has always filled the reserved fields in the
> microcode data files with zeros.

Yes, and this is the statement I was looking for. IF(!) this really
is the case, then we don't have anything to worry about because new
kernel with old container will look at ->datasize, see 0 and return
DEFAULT_UCODE_TOTALSIZE and we're fine.

I've updated the patch with your additional explanation.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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