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 --- drivers/gpu/drm/radeon/r300_cmdbuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/r300_cmdbuf.c b/drivers/gpu/drm/radeon/r300_cmdbuf.c index 865e2c9..60170ea 100644 --- a/drivers/gpu/drm/radeon/r300_cmdbuf.c +++ b/drivers/gpu/drm/radeon/r300_cmdbuf.c @@ -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;