linux-kernel - Re: [PATCH v3] x86: avoid remapping data in parse_setup

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Message-ID: <520B2327.9080404@iki.fi>
Date:	Wed, 14 Aug 2013 09:26:47 +0300
From:	Pekka Enberg <penberg@....fi>
To:	Linn Crosetto <linn@...com>
CC:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, paulmck@...ux.vnet.ibm.com, dhowells@...hat.com,
	mtk.manpages@...il.com, yinghai@...nel.org, penberg@...nel.org,
	jacob.shin@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] x86: avoid remapping data in parse_setup_data()

On 8/14/13 12:46 AM, Linn Crosetto wrote:
> Type SETUP_PCI, added by setup_efi_pci(), may advertise a ROM size
> larger than early_memremap() is able to handle, which is currently
> limited to 256kB. If this occurs it leads to a NULL dereference in
> parse_setup_data().
>
> To avoid this, remap the setup_data header and allow parsing functions
> for individual types to handle their own data remapping.
>
> Signed-off-by: Linn Crosetto <linn@...com>

Reviewed-by: Pekka Enberg <penberg@...nel.org>
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