From: Ville Syrjälä ville.syrjala@linux.intel.com
Make sure the source coordinates stay within the buffer.
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/drm_crtc.c | 23 +++++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index d9bf9d8..1242e12 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -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,