static int ipmi_thread(void *data)
{
	struct smi_info *smi_info = data;
	unsigned long flags;
	enum si_sm_result smi_result;
	struct timespec64 busy_until;

	ipmi_si_set_not_busy(&busy_until);
	set_user_nice(current, MAX_NICE);
	while (!kthread_should_stop()) {
		int busy_wait;

		spin_lock_irqsave(&(smi_info->si_lock), flags);
		smi_result = smi_event_handler(smi_info, 0);

		/*
		 * If the driver is doing something, there is a possible
		 * race with the timer.  If the timer handler see idle,
		 * and the thread here sees something else, the timer
		 * handler won't restart the timer even though it is
		 * required.  So start it here if necessary.
		 */
		if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);

		spin_unlock_irqrestore(&(smi_info->si_lock), flags);
		busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
						  &busy_until);
		if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
			; /* do nothing */
		else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
			schedule();
		else if (smi_result == SI_SM_IDLE) {
			if (atomic_read(&smi_info->need_watch)) {
				schedule_timeout_interruptible(100);
			} else {
				/* Wait to be woken up when we are needed. */
				__set_current_state(TASK_INTERRUPTIBLE);
				schedule();
			}
		} else
			schedule_timeout_interruptible(1);
	}
	return 0;
}

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.