Merge "AIO: properly check iovec sizes"

				       unsigned long *nr_segs,

				       struct iovec *iovec)

{

	if (unlikely(!access_ok(!rw, buf, kiocb->ki_nbytes)))

	size_t len = kiocb->ki_nbytes;

	if (len > MAX_RW_COUNT)

		len = MAX_RW_COUNT;

	if (unlikely(!access_ok(!rw, buf, len)))

		return -EFAULT;

	iovec->iov_base = buf;

	iovec->iov_len = kiocb->ki_nbytes;

	iovec->iov_len = len;

	*nr_segs = 1;

	return 0;

}