Commit 3a1b8a4e authored Aug 20, 2021 by Pavel Begunkov Committed by Jens Axboe Aug 23, 2021

io_uring: limit fixed table size by RLIMIT_NOFILE



Limit the number of files in io_uring fixed tables by RLIMIT_NOFILE,
that's the first and the simpliest restriction that we should impose.

Cc: stable@vger.kernel.org
Suggested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b2756c340aed7d6c0b302c26dab50c6c5907f4ce.1629451684.git.asml.silence@gmail.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 99c8bc52

fs/io_uring.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -7733,6 +7733,8 @@ static int io_sqe_files_register(struct io_ring_ctx ctx, void __user arg,
		return -EINVAL;
		if (nr_args > IORING_MAX_FIXED_FILES)
		return -EMFILE;
		if (nr_args > rlimit(RLIMIT_NOFILE))
		return -EMFILE;
		ret = io_rsrc_node_switch_start(ctx);
		if (ret)
		return ret;