diff --git a/drivers/gpu/drm/drm_drawable.c b/drivers/gpu/drm/drm_drawable.c
index 1839c57..70b15d1 100644
--- a/drivers/gpu/drm/drm_drawable.c
+++ b/drivers/gpu/drm/drm_drawable.c
@@ -111,7 +111,9 @@
 
 	switch (update->type) {
 	case DRM_DRAWABLE_CLIPRECTS:
-		if (update->num != info->num_rects) {
+		if (update->num == 0)
+			rects = NULL;
+		else if (update->num != info->num_rects) {
 			rects = drm_alloc(update->num * sizeof(struct drm_clip_rect),
 					 DRM_MEM_BUFS);
 		} else