int save_mc_for_early(u8 *mc)
{
	struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
	unsigned int mc_saved_count_init;
	unsigned int mc_saved_count;
	struct microcode_intel **mc_saved;
	int ret = 0;
	int i;

	/*
	 * Hold hotplug lock so mc_saved_data is not accessed by a CPU in
	 * hotplug.
	 */
	mutex_lock(&x86_cpu_microcode_mutex);

	mc_saved_count_init = mc_saved_data.mc_saved_count;
	mc_saved_count = mc_saved_data.mc_saved_count;
	mc_saved = mc_saved_data.mc_saved;

	if (mc_saved && mc_saved_count)
		memcpy(mc_saved_tmp, mc_saved,
		       mc_saved_count * sizeof(struct microcode_intel *));
	/*
	 * Save the microcode patch mc in mc_save_tmp structure if it's a newer
	 * version.
	 */

	_save_mc(mc_saved_tmp, mc, &mc_saved_count);

	/*
	 * Save the mc_save_tmp in global mc_saved_data.
	 */
	ret = save_microcode(&mc_saved_data, mc_saved_tmp, mc_saved_count);
	if (ret) {
		pr_err("Cannot save microcode patch.\n");
		goto out;
	}

	show_saved_mc();

	/*
	 * Free old saved microcode data.
	 */
	if (mc_saved) {
		for (i = 0; i < mc_saved_count_init; i++)
			kfree(mc_saved[i]);
		kfree(mc_saved);
	}

out:
	mutex_unlock(&x86_cpu_microcode_mutex);

	return ret;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.