diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 3f1799b52d06..09851ce2500e 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1815,7 +1815,17 @@ int drm_mode_getfb(struct drm_device *dev, r->depth = fb->depth; r->bpp = fb->bits_per_pixel; r->pitch = fb->pitch; - fb->funcs->create_handle(fb, file_priv, &r->handle); + if (file_priv->is_master || capable(CAP_SYS_ADMIN)) { + ret = fb->funcs->create_handle(fb, file_priv, &r->handle); + } else { + /* GET_FB() is an unprivileged ioctl so we must not + * return a buffer-handle to non-master processes! For + * backwards-compatibility reasons, we cannot make + * GET_FB() privileged, so just return an invalid handle + * for non-masters. */ + r->handle = 0; + ret = 0; + } out: mutex_unlock(&dev->mode_config.mutex); |