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drm: plane: Check source coordinates 

Make sure the source coordinates stay within the buffer.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ville Syrjälä 2011-12-20 00:06:44 +02:00 committed by Dave Airlie
parent e5e3b44c67
commit 42ef87896a
1 changed files with 23 additions and 0 deletions
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23
drivers/gpu/drm/drm_crtc.c
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@ -1661,6 +1661,7 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
struct drm_crtc *crtc;
struct drm_framebuffer *fb;
int ret = 0;
unsigned int fb_width, fb_height;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
@ -1709,6 +1710,28 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
}
fb = obj_to_fb(obj);
fb_width = fb->width << 16;
fb_height = fb->height << 16;
/* Make sure source coordinates are inside the fb. */
if (plane_req->src_w > fb_width ||
plane_req->src_x > fb_width - plane_req->src_w ||
plane_req->src_h > fb_height ||
plane_req->src_y > fb_height - plane_req->src_h) {
DRM_DEBUG_KMS("Invalid source coordinates "
"%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
plane_req->src_w >> 16,
((plane_req->src_w & 0xffff) * 15625) >> 10,
plane_req->src_h >> 16,
((plane_req->src_h & 0xffff) * 15625) >> 10,
plane_req->src_x >> 16,
((plane_req->src_x & 0xffff) * 15625) >> 10,
plane_req->src_y >> 16,
((plane_req->src_y & 0xffff) * 15625) >> 10);
ret = -ENOSPC;
goto out;
}
ret = plane->funcs->update_plane(plane, crtc, fb,
plane_req->crtc_x, plane_req->crtc_y,
plane_req->crtc_w, plane_req->crtc_h,