backend/wayland: Avoid uninitialized read
keyboard_handle_leave would always process 1 keycode more than was
pending, which meant reading uninitialized memory from the "pressed"
array.
Found by valgrind.
@@ -235,11 +235,12 @@ static void keyboard_handle_leave(void *data, struct wl_keyboard *wl_keyboard,
uint32_t time = get_current_time_msec();
- uint32_t pressed[dev->keyboard->num_keycodes + 1];
+ size_t num_keycodes = dev->keyboard->num_keycodes;
+ uint32_t pressed[num_keycodes + 1];
memcpy(pressed, dev->keyboard->keycodes,
- dev->keyboard->num_keycodes * sizeof(uint32_t));
+ num_keycodes * sizeof(uint32_t));
- for (size_t i = 0; i < sizeof(pressed)/sizeof(pressed[0]); ++i) {
+ for (size_t i = 0; i < num_keycodes; ++i) {
uint32_t keycode = pressed[i];
struct wlr_event_keyboard_key event = {
