backend/drm: fix VLA overflow
@@ -428,6 +428,19 @@ bool enable_drm_connector(struct wlr_output *output, bool enable) {
return true;
}
+static ssize_t connector_index_from_crtc(struct wlr_drm_backend *drm,
+ struct wlr_drm_crtc *crtc) {
+ size_t i = 0;
+ struct wlr_drm_connector *conn;
+ wl_list_for_each(conn, &drm->outputs, link) {
+ if (conn->crtc == crtc) {
+ return i;
+ }
+ ++i;
+ }
+ return -1;
+}
+
static void realloc_planes(struct wlr_drm_backend *drm, const uint32_t *crtc_in,
bool *changed_outputs) {
wlr_log(WLR_DEBUG, "Reallocating planes");
@@ -477,7 +490,10 @@ static void realloc_planes(struct wlr_drm_backend *drm, const uint32_t *crtc_in,
type,
c->id);
- changed_outputs[crtc_res[i]] = true;
+ ssize_t conn_idx = connector_index_from_crtc(drm, c);
+ if (conn_idx >= 0) {
+ changed_outputs[conn_idx] = true;
+ }
if (*old) {
finish_drm_surface(&(*old)->surf);
}
