static int add_regulator_attributes(struct regulator_dev *rdev)
{
	struct device *dev = &rdev->dev;
	const struct regulator_ops *ops = rdev->desc->ops;
	int status = 0;

	/* some attributes need specific methods to be displayed */
	if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
	    (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
	    (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) ||
		(rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1))) {
		status = device_create_file(dev, &dev_attr_microvolts);
		if (status < 0)
			return status;
	}
	if (ops->get_current_limit) {
		status = device_create_file(dev, &dev_attr_microamps);
		if (status < 0)
			return status;
	}
	if (ops->get_mode) {
		status = device_create_file(dev, &dev_attr_opmode);
		if (status < 0)
			return status;
	}
	if (rdev->ena_pin || ops->is_enabled) {
		status = device_create_file(dev, &dev_attr_state);
		if (status < 0)
			return status;
	}
	if (ops->get_status) {
		status = device_create_file(dev, &dev_attr_status);
		if (status < 0)
			return status;
	}
	if (ops->get_bypass) {
		status = device_create_file(dev, &dev_attr_bypass);
		if (status < 0)
			return status;
	}

	/* some attributes are type-specific */
	if (rdev->desc->type == REGULATOR_CURRENT) {
		status = device_create_file(dev, &dev_attr_requested_microamps);
		if (status < 0)
			return status;
	}

	/* all the other attributes exist to support constraints;
	 * don't show them if there are no constraints, or if the
	 * relevant supporting methods are missing.
	 */
	if (!rdev->constraints)
		return status;

	/* constraints need specific supporting methods */
	if (ops->set_voltage || ops->set_voltage_sel) {
		status = device_create_file(dev, &dev_attr_min_microvolts);
		if (status < 0)
			return status;
		status = device_create_file(dev, &dev_attr_max_microvolts);
		if (status < 0)
			return status;
	}
	if (ops->set_current_limit) {
		status = device_create_file(dev, &dev_attr_min_microamps);
		if (status < 0)
			return status;
		status = device_create_file(dev, &dev_attr_max_microamps);
		if (status < 0)
			return status;
	}

	status = device_create_file(dev, &dev_attr_suspend_standby_state);
	if (status < 0)
		return status;
	status = device_create_file(dev, &dev_attr_suspend_mem_state);
	if (status < 0)
		return status;
	status = device_create_file(dev, &dev_attr_suspend_disk_state);
	if (status < 0)
		return status;

	if (ops->set_suspend_voltage) {
		status = device_create_file(dev,
				&dev_attr_suspend_standby_microvolts);
		if (status < 0)
			return status;
		status = device_create_file(dev,
				&dev_attr_suspend_mem_microvolts);
		if (status < 0)
			return status;
		status = device_create_file(dev,
				&dev_attr_suspend_disk_microvolts);
		if (status < 0)
			return status;
	}

	if (ops->set_suspend_mode) {
		status = device_create_file(dev,
				&dev_attr_suspend_standby_mode);
		if (status < 0)
			return status;
		status = device_create_file(dev,
				&dev_attr_suspend_mem_mode);
		if (status < 0)
			return status;
		status = device_create_file(dev,
				&dev_attr_suspend_disk_mode);
		if (status < 0)
			return status;
	}

	return status;
}

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.