[PATCH] drm: Check for invalid cursor flags

[Jakob Bornecrantz]

Signed-off-by: Jakob Bornecrantz <jakob at vmware.com>
---
 drivers/gpu/drm/drm_crtc.c |    2 +-
 include/drm/drm_mode.h     |    5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 08a7aa7..6fbfc24 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1981,7 +1981,7 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
        if (!drm_core_check_feature(dev, DRIVER_MODESET))
                return -EINVAL;

-       if (!req->flags)
+       if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
                return -EINVAL;

        mutex_lock(&dev->mode_config.mutex);
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index 5581980..3d6301b 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -359,8 +359,9 @@ struct drm_mode_mode_cmd {
        struct drm_mode_modeinfo mode;
 };

-#define DRM_MODE_CURSOR_BO     (1<<0)
-#define DRM_MODE_CURSOR_MOVE   (1<<1)
+#define DRM_MODE_CURSOR_BO     0x01
+#define DRM_MODE_CURSOR_MOVE   0x02
+#define DRM_MODE_CURSOR_FLAGS  0x03

 /*
  * depending on the value in flags different members are used.
-- 
1.7.9.5