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drm/radeon: check incoming cliprects pointer 

The "boxes" parameter points into userspace memory. It should be verified
like any other operation against user memory.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Kees Cook 2013-05-12 22:00:51 -07:00 committed by Dave Airlie
parent 9f1d036648
commit fefaedcfb8
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/radeon/r300_cmdbuf.c
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@ -75,7 +75,7 @@ static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
OUT_RING(CP_PACKET0(R300_RE_CLIPRECT_TL_0, nr * 2 - 1));
for (i = 0; i < nr; ++i) {
if (DRM_COPY_FROM_USER_UNCHECKED
if (DRM_COPY_FROM_USER
(&box, &cmdbuf->boxes[n + i], sizeof(box))) {
DRM_ERROR("copy cliprect faulted\n");
return -EFAULT;