drm: Check for invalid cursor flags
authorJakob Bornecrantz <jakob@vmware.com>
Thu, 16 Aug 2012 08:29:03 +0000 (08:29 +0000)
committerDave Airlie <airlied@redhat.com>
Thu, 23 Aug 2012 23:38:40 +0000 (09:38 +1000)
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/drm_crtc.c
include/drm/drm_mode.h

index 08a7aa722d6b8f0d798b7a59ccd5b8146183f497..6fbfc244748fd9f5e23e05c90d57bcfbdead4b6b 100644 (file)
@@ -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);
index 5581980b14f606e593e9827e175980e5a50802f0..3d6301b6ec16d36b60cb4f69570170b8c804fb6d 100644 (file)
@@ -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.