static int __init regulator_init_complete(void)
{
	struct regulator_dev *rdev;
	const struct regulator_ops *ops;
	struct regulation_constraints *c;
	int enabled, ret;

	/*
	 * Since DT doesn't provide an idiomatic mechanism for
	 * enabling full constraints and since it's much more natural
	 * with DT to provide them just assume that a DT enabled
	 * system has full constraints.
	 */
	if (of_have_populated_dt())
		has_full_constraints = true;

	mutex_lock(&regulator_list_mutex);

	/* If we have a full configuration then disable any regulators
	 * we have permission to change the status for and which are
	 * not in use or always_on.  This is effectively the default
	 * for DT and ACPI as they have full constraints.
	 */
	list_for_each_entry(rdev, &regulator_list, list) {
		ops = rdev->desc->ops;
		c = rdev->constraints;

		if (c && c->always_on)
			continue;

		if (c && !(c->valid_ops_mask & REGULATOR_CHANGE_STATUS))
			continue;

		mutex_lock(&rdev->mutex);

		if (rdev->use_count)
			goto unlock;

		/* If we can't read the status assume it's on. */
		if (ops->is_enabled)
			enabled = ops->is_enabled(rdev);
		else
			enabled = 1;

		if (!enabled)
			goto unlock;

		if (have_full_constraints()) {
			/* We log since this may kill the system if it
			 * goes wrong. */
			rdev_info(rdev, "disabling\n");
			ret = _regulator_do_disable(rdev);
			if (ret != 0)
				rdev_err(rdev, "couldn't disable: %d\n", ret);
		} else {
			/* The intention is that in future we will
			 * assume that full constraints are provided
			 * so warn even if we aren't going to do
			 * anything here.
			 */
			rdev_warn(rdev, "incomplete constraints, leaving on\n");
		}

unlock:
		mutex_unlock(&rdev->mutex);
	}

	mutex_unlock(&regulator_list_mutex);

	return 0;
}

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 Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.