Commit 1d97e915 authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Dave Airlie

drm: Check crtc x and y coordinates

The crtc x/y panning coordinates are stored as signed integers
internally. The user provides them as unsigned, so we should check
that the user provided values actually fit in the internal datatypes.
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e36fae38
...@@ -1774,6 +1774,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data, ...@@ -1774,6 +1774,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET)) if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL; return -EINVAL;
/* For some reason crtc x/y offsets are signed internally. */
if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
return -ERANGE;
mutex_lock(&dev->mode_config.mutex); mutex_lock(&dev->mode_config.mutex);
obj = drm_mode_object_find(dev, crtc_req->crtc_id, obj = drm_mode_object_find(dev, crtc_req->crtc_id,
DRM_MODE_OBJECT_CRTC); DRM_MODE_OBJECT_CRTC);
......
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