Re: [PATCH v2 1/2] drm/i915: fix integer overflow in i915_gem_execbuffer2()

From: Chris Wilson
Date: Mon Apr 23 2012 - 04:19:26 EST

On Mon, 23 Apr 2012 04:06:41 -0400, Xi Wang <> wrote:
> On 32-bit systems, a large args->buffer_count from userspace via ioctl
> may overflow the allocation size, leading to out-of-bounds access.
> This vulnerability was introduced in commit 8408c282 ("drm/i915:
> First try a normal large kmalloc for the temporary exec buffers").
> Signed-off-by: Xi Wang <>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

Chris Wilson, Intel Open Source Technology Centre
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