static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,
			    struct fuse_copy_state *cs)
{
	struct fuse_notify_poll_wakeup_out outarg;
	int err = -EINVAL;

	if (size != sizeof(outarg))
		goto err;

	err = fuse_copy_one(cs, &outarg, sizeof(outarg));
	if (err)
		goto err;

	fuse_copy_finish(cs);
	return fuse_notify_poll_wakeup(fc, &outarg);

err:
	fuse_copy_finish(cs);
	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.