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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-08-20 10:36:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-15 10:02:32 +0200 |
| commit | 917342c3714358991d8ac2bd29bff8f6ea62f077 (patch) | |
| tree | fc5fa4502dddb376b3e32e1017b8dc6db85e3698 | |
| parent | 1b19425f8e2af878840897d09b3d2759b254d04e (diff) | |
| download | linux-stable-917342c3714358991d8ac2bd29bff8f6ea62f077.tar.gz linux-stable-917342c3714358991d8ac2bd29bff8f6ea62f077.tar.bz2 linux-stable-917342c3714358991d8ac2bd29bff8f6ea62f077.zip | |
io_uring: limit fixed table size by RLIMIT_NOFILE
commit 3a1b8a4e843f96b636431450d8d79061605cf74b upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index a2e20a6fbfed..0d6f1b335fb3 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7722,6 +7722,8 @@ 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; |