int oz_cdev_register(void)
{
	int err;
	struct device *dev;

	memset(&g_cdev, 0, sizeof(g_cdev));
	err = alloc_chrdev_region(&g_cdev.devnum, 0, 1, "ozwpan");
	if (err < 0)
		return err;
	oz_dbg(ON, "Alloc dev number %d:%d\n",
	       MAJOR(g_cdev.devnum), MINOR(g_cdev.devnum));
	cdev_init(&g_cdev.cdev, &oz_fops);
	g_cdev.cdev.owner = THIS_MODULE;
	g_cdev.cdev.ops = &oz_fops;
	spin_lock_init(&g_cdev.lock);
	init_waitqueue_head(&g_cdev.rdq);
	err = cdev_add(&g_cdev.cdev, g_cdev.devnum, 1);
	if (err < 0) {
		oz_dbg(ON, "Failed to add cdev\n");
		goto unregister;
	}
	g_oz_class = class_create(THIS_MODULE, "ozmo_wpan");
	if (IS_ERR(g_oz_class)) {
		oz_dbg(ON, "Failed to register ozmo_wpan class\n");
		err = PTR_ERR(g_oz_class);
		goto delete;
	}
	dev = device_create(g_oz_class, NULL, g_cdev.devnum, NULL, "ozwpan");
	if (IS_ERR(dev)) {
		oz_dbg(ON, "Failed to create sysfs entry for cdev\n");
		err = PTR_ERR(dev);
		goto delete;
	}
	return 0;

delete:
	cdev_del(&g_cdev.cdev);
unregister:
	unregister_chrdev_region(g_cdev.devnum, 1);
	return err;
}

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.