static inline int vop_vdev_inited(struct vop_vdev *vdev)
{
	if (!vdev)
		return -EINVAL;
	/* Device has not been created yet */
	if (!vdev->dd || !vdev->dd->type) {
		dev_err(vop_dev(vdev), "%s %d err %d\n",
			__func__, __LINE__, -EINVAL);
		return -EINVAL;
	}
	/* Device has been removed/deleted */
	if (vdev->dd->type == -1) {
		dev_dbg(vop_dev(vdev), "%s %d err %d\n",
			__func__, __LINE__, -ENODEV);
		return -ENODEV;
	}
	return 0;
}

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.