Post protocol error on invalid wl_surface scale
Letting the scale be set to 0 causes division by zero errors.
@@ -459,6 +459,11 @@ static void surface_set_buffer_transform(struct wl_client *client,
static void surface_set_buffer_scale(struct wl_client *client,
struct wl_resource *resource,
int32_t scale) {
+ if (scale <= 0) {
+ wl_resource_post_error(resource, WL_SURFACE_ERROR_INVALID_SCALE,
+ "Specified scale value (%d) is not positive", scale);
+ return;
+ }
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_SCALE;
surface->pending.scale = scale;
