static int snd_timer_user_gparams(struct file *file,
				  struct snd_timer_gparams __user *_gparams)
{
	struct snd_timer_gparams gparams;
	struct snd_timer *t;
	int err;

	if (copy_from_user(&gparams, _gparams, sizeof(gparams)))
		return -EFAULT;
	mutex_lock(&register_mutex);
	t = snd_timer_find(&gparams.tid);
	if (!t) {
		err = -ENODEV;
		goto _error;
	}
	if (!list_empty(&t->open_list_head)) {
		err = -EBUSY;
		goto _error;
	}
	if (!t->hw.set_period) {
		err = -ENOSYS;
		goto _error;
	}
	err = t->hw.set_period(t, gparams.period_num, gparams.period_den);
_error:
	mutex_unlock(&register_mutex);
	return err;
}

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.