Patchwork [103/115] drm/radeon: check incoming cliprects pointer

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Submitter Luis Henriques
Date May 20, 2013, 10:51 a.m.
Message ID <1369047116-9378-104-git-send-email-luis.henriques@canonical.com>
Download mbox | patch
Permalink /patch/244941/
State New
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Luis Henriques - May 20, 2013, 10:51 a.m.
3.5.7.13 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kees Cook <keescook@chromium.org>

commit fefaedcfb82d2e57c2320acf60604ab03b750cc0 upstream.

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>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/radeon/r300_cmdbuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drivers/gpu/drm/radeon/r300_cmdbuf.c b/drivers/gpu/drm/radeon/r300_cmdbuf.c
index 1fe98b4..9aa02be 100644
--- a/drivers/gpu/drm/radeon/r300_cmdbuf.c
+++ b/drivers/gpu/drm/radeon/r300_cmdbuf.c
@@ -74,7 +74,7 @@  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;