From: Daniel Vetter <daniel@ffwll.ch>
To: Chris Wilson <chris@chris-wilson.co.uk>,
Kees Cook <keescook@chromium.org>,
linux-kernel@vger.kernel.org,
Daniel Vetter <daniel.vetter@ffwll.ch>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
Julien Tinnes <jln@google.com>,
marcheu@chromium.org
Subject: Re: [PATCH v3] drm/i915: bounds check execbuffer relocation count
Date: Wed, 13 Mar 2013 21:28:58 +0100 [thread overview]
Message-ID: <20130313202858.GD1896@bremse> (raw)
In-Reply-To: <20130312090746.GD31324@cantiga.alporthouse.com>
On Tue, Mar 12, 2013 at 09:07:46AM +0000, Chris Wilson wrote:
> On Mon, Mar 11, 2013 at 05:31:45PM -0700, Kees Cook wrote:
> > It is possible to wrap the counter used to allocate the buffer for
> > relocation copies. This could lead to heap writing overflows.
> >
> > CVE-2013-0913
> >
> > v3: collapse test, improve comment
> > v2: move check into validate_exec_list
> >
> > Signed-off-by: Kees Cook <keescook@chromium.org>
> > Reported-by: Pinkie Pie
> > Cc: stable@vger.kernel.org
>
> Looks good to me. The only bikeshed that remains is whether we should
> just collapse the two variables into one, but the current 'max - count'
> is more idiomatic and so preferrable.
> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Picked up for -fixes, thanks for the patch.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
next prev parent reply other threads:[~2013-03-13 20:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-12 0:31 [PATCH v3] drm/i915: bounds check execbuffer relocation count Kees Cook
2013-03-12 9:07 ` Chris Wilson
2013-03-13 20:28 ` Daniel Vetter [this message]
2013-03-14 16:57 ` Daniel Vetter
2013-03-14 19:32 ` Kees Cook
2013-03-15 12:32 ` [Intel-gfx] " Damien Lespiau
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