static void ss_wakeup(struct list_head *h, int kill)
{
	struct msg_sender *mss, *t;

	list_for_each_entry_safe(mss, t, h, list) {
		if (kill)
			mss->list.next = NULL;
		wake_up_process(mss->tsk);
	}
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.