From: Xi Wang <xi.wang@gmail.com>
Date: Mon, 23 Apr 2012 08:06:42 +0000 (-0400)
Subject: drm/i915: fix integer overflow in i915_gem_do_execbuffer()
X-Git-Tag: v3.4-rc5~14^2~2^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44afb3a04391a74309d16180d1e4f8386fdfa745;p=pandora-kernel.git

drm/i915: fix integer overflow in i915_gem_do_execbuffer()

On 32-bit systems, a large args->num_cliprects from userspace via ioctl
may overflow the allocation size, leading to out-of-bounds access.

This vulnerability was introduced in commit 432e58ed ("drm/i915: Avoid
allocation for execbuffer object list").

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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