linux-kernel - Re: [PATCH 4.1 11/86] iommu/amd: Fix BUG when faulting a PROT

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Message-ID: <20151108114512.GF2255@suse.de>
Date:	Sun, 8 Nov 2015 12:45:12 +0100
From:	Joerg Roedel <jroedel@...e.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>, Jay Cornwall <jay@...rnwall.me>
Subject: Re: [PATCH 4.1 11/86] iommu/amd: Fix BUG when faulting a PROT_NONE
 VMA

On Fri, Nov 06, 2015 at 12:49:20PM -0800, Linus Torvalds wrote:
> I'm not arguing against the stable backport, because that is fine. But
> I think this should be fixed further.
> 
> Joerg?

Huh, you are right, I completly missed that. Basically the code needs to
do a lot of checks that the cpu page-fault handlers also do, including
the access-checks. Other checks are probably necessary too, I'll have
look at this. Thanks for pointing it out.


	Joerg

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