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(parent: 37d16d5) | patch
drm/i915: fix integer overflow in i915_gem_do_execbuffer()
authorXi Wang <xi.wang@gmail.com>
Mon, 23 Apr 2012 08:06:42 +0000 (04:06 -0400)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 23 Apr 2012 20:32:15 +0000 (22:32 +0200)
commitd5efca15b71872f954b3816f5f72f96c933a3a5c
treefeec2dbbdc8a76932bd10289a3532a4b29c6ef6atree | snapshot
parent37d16d5cc29a29e847ee215fca43839140aee47ccommit | diff
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 66a147da ("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>
drivers/gpu/drm/i915/i915_gem_execbuffer.c diff | blob | history
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