linux-kernel - Re: [PATCH 4/4] iommu/vt-d: Do access checks before calling handle_mm

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Date:	Fri, 20 Nov 2015 15:35:53 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	Joerg Roedel <joro@...tes.org>, iommu@...ts.linux-foundation.org
Cc:	Joerg Roedel <jroedel@...e.de>, linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 4/4] iommu/vt-d: Do access checks before calling
 handle_mm_fault()

On Tue, 2015-11-17 at 16:11 +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> Not doing so is a bug and might trigger a BUG_ON in
> handle_mm_fault(). So add the proper permission checks
> before calling into mm code.
> 
> Signed-off-by: Joerg Roedel <jroedel@...e.de>

Acked-By: David Woodhouse <David.Woodhouse@...el.com>

As noted, I can't test it right now until I've replaced my test
hardware. Certainly looks better than the last version though :)

Thanks.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation


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