static long ioctl_file_dedupe_range(struct file *file, void __user *arg)
{
	struct file_dedupe_range __user *argp = arg;
	struct file_dedupe_range *same = NULL;
	int ret;
	unsigned long size;
	u16 count;

	if (get_user(count, &argp->dest_count)) {
		ret = -EFAULT;
		goto out;
	}

	size = offsetof(struct file_dedupe_range __user, info[count]);

	same = memdup_user(argp, size);
	if (IS_ERR(same)) {
		ret = PTR_ERR(same);
		same = NULL;
 		goto out;
 	}
 
 	ret = vfs_dedupe_file_range(file, same);
 	if (ret)
 		goto out;

	ret = copy_to_user(argp, same, size);
	if (ret)
		ret = -EFAULT;

out:
	kfree(same);
	return ret;
}

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.