void tee_mmu_set_ctx(struct tee_ta_ctx *ctx)
{
	struct thread_specific_data *tsd = thread_get_tsd();

	core_mmu_set_user_map(NULL);
	/*
	 * No matter what happens below, the current user TA will not be
	 * current any longer. Make sure pager is in sync with that.
	 * This function has to be called before there's a chance that
	 * pgt_free_unlocked() is called.
	 *
	 * Save translation tables in a cache if it's a user TA.
	 */
	pgt_free(&tsd->pgt_cache, tsd->ctx && is_user_ta_ctx(tsd->ctx));

	if (ctx && is_user_ta_ctx(ctx)) {
		struct core_mmu_user_map map;
		struct user_ta_ctx *utc = to_user_ta_ctx(ctx);

		core_mmu_create_user_map(utc, &map);
		core_mmu_set_user_map(&map);
		tee_pager_assign_uta_tables(utc);
	}
	tsd->ctx = ctx;
}

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.