static int set_global_enables(struct smi_info *smi_info, u8 enables)
{
	unsigned char         msg[3];
	unsigned char         *resp;
	unsigned long         resp_len;
	int                   rv;

	resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
	if (!resp)
		return -ENOMEM;

	msg[0] = IPMI_NETFN_APP_REQUEST << 2;
	msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
	msg[2] = enables;
	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);

	rv = wait_for_msg_done(smi_info);
	if (rv) {
		dev_warn(smi_info->io.dev,
			 "Error getting response from set global enables command: %d\n",
			 rv);
		goto out;
	}

	resp_len = smi_info->handlers->get_result(smi_info->si_sm,
						  resp, IPMI_MAX_MSG_LENGTH);

	if (resp_len < 3 ||
			resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
			resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
		dev_warn(smi_info->io.dev,
			 "Invalid return from set global enables command: %ld %x %x\n",
			 resp_len, resp[0], resp[1]);
		rv = -EINVAL;
		goto out;
	}

	if (resp[2] != 0)
		rv = 1;

out:
	kfree(resp);
	return rv;
}

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 Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.