Commit dd201662 authored Dec 19, 2020 by Pavel Begunkov Committed by Jens Axboe Dec 19, 2020

io_uring: fix 0-iov read buffer select



Doing vectored buf-select read with 0 iovec passed is meaningless and
utterly broken, forbid it.

Cc: <stable@vger.kernel.org> # 5.7+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent dfea9fce

fs/io_uring.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -3125,9 +3125,7 @@ static ssize_t io_iov_buffer_select(struct io_kiocb req, struct iovec iov,
		iov[0].iov_len = kbuf->len;
		return 0;
		}
		if (!req->rw.len)
		return 0;
		else if (req->rw.len > 1)
		if (req->rw.len != 1)
		return -EINVAL;

		#ifdef CONFIG_COMPAT

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