static void __munlock_isolated_page(struct page *page)
{
	/*
	 * Optimization: if the page was mapped just once, that's our mapping
	 * and we don't need to check all the other vmas.
	 */
	if (page_mapcount(page) > 1)
		try_to_munlock(page);

	/* Did try_to_unlock() succeed or punt? */
	if (!PageMlocked(page))
		count_vm_event(UNEVICTABLE_PGMUNLOCKED);

	putback_lru_page(page);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.