From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Cc: [email protected]
Subject: [PATCH 1/3] io_uring: limit fixed table size by RLIMIT_NOFILE
Date: Fri, 20 Aug 2021 10:36:35 +0100 [thread overview]
Message-ID: <b2756c340aed7d6c0b302c26dab50c6c5907f4ce.1629451684.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>
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: [email protected]
Suggested-by: Jens Axboe <[email protected]>
Signed-off-by: Pavel Begunkov <[email protected]>
---
fs/io_uring.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 30edc329d803..e6301d5d03a8 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7730,6 +7730,8 @@ 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;
--
2.32.0
next prev parent reply other threads:[~2021-08-20 9:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 9:36 [PATCH 0/3] changes around fixed rsrc Pavel Begunkov
2021-08-20 9:36 ` Pavel Begunkov [this message]
2021-08-20 9:36 ` [PATCH 2/3] io_uring: place fixed tables under memcg limits Pavel Begunkov
2021-08-20 9:36 ` [PATCH 3/3] io_uring: add ->splice_fd_in checks Pavel Begunkov
2021-08-21 13:18 ` [PATCH 0/3] changes around fixed rsrc Jens Axboe
2021-08-21 14:25 ` Pavel Begunkov
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