linux-kernel - Re: [PATCH 7/8] x86, microcode, intel: guard against misaligned microcode data

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Date:	Tue, 11 Nov 2014 18:13:57 +0100
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 7/8] x86, microcode, intel: guard against misaligned
 microcode data

On Tue, Nov 11, 2014 at 02:57:31PM -0200, Henrique de Moraes Holschuh wrote:
> Meh, I don't know where I came up with the wrong information that kmalloc
> aligned to 16-bytes instead of 8 bytes.
> 
> I do wonder why I didn't hit this while testing, though.  Maybe an artifact
> of slub, or just my luck that I never got a memory block that was not
> aligned to 16 bytes.

The ARCH_KMALLOC_MINALIGN is conditioned on ARCH_DMA_MINALIGN and a
bunch of other things. All I'm saying is, this needs a careful study
when, if at all, kmalloc will not give an 16-byte aligned buffer.

-- 
Regards/Gruss,
    Boris.

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