From: Ville Syrjälä ville.syrjala@linux.intel.com
Make sure the requested CRTC viewport fits inside the framebuffer.
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/drm_crtc.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 4d9e69c..3f5c603 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1835,6 +1835,18 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, }
drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); + + if (mode->hdisplay > fb->width || + mode->vdisplay > fb->height || + crtc_req->x > fb->width - mode->hdisplay || + crtc_req->y > fb->height - mode->vdisplay) { + DRM_DEBUG_KMS("Invalid CRTC viewport %ux%u+%u+%u for fb size %ux%u.\n", + mode->hdisplay, mode->vdisplay, + crtc_req->x, crtc_req->y, + fb->width, fb->height); + ret = -ENOSPC; + goto out; + } }
if (crtc_req->count_connectors == 0 && mode) { @@ -3206,6 +3218,18 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev, goto out; fb = obj_to_fb(obj);
+ if (crtc->mode.hdisplay > fb->width || + crtc->mode.vdisplay > fb->height || + crtc->x > fb->width - crtc->mode.hdisplay || + crtc->y > fb->height - crtc->mode.vdisplay) { + DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d.\n", + fb->width, fb->height, + crtc->mode.hdisplay, crtc->mode.vdisplay, + crtc->x, crtc->y); + ret = -ENOSPC; + goto out; + } + if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { ret = -ENOMEM; spin_lock_irqsave(&dev->event_lock, flags);