public inbox for [email protected]
 help / color / mirror / Atom feed
From: Pavel Begunkov <[email protected]>
To: [email protected]
Cc: Jens Axboe <[email protected]>, [email protected]
Subject: [PATCH for-next 10/10] io_uring: add an warn_once for poll_find
Date: Mon, 20 Jun 2022 01:26:01 +0100	[thread overview]
Message-ID: <ec9a66f1e22f99dcd02288d4e42f3cc6bb357804.1655684496.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

io_poll_remove() expects poll_find() to search only for poll requests
and passes a flag for this. Just be a little bit extra cautious
considering lots of recent poll/cancellation changes and add a
WARN_ON_ONCE checking that we don't get an apoll'ed request.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 io_uring/poll.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/io_uring/poll.c b/io_uring/poll.c
index 9af6a34222a9..8f4fff76d3b4 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -827,6 +827,11 @@ int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags)
 	}
 
 found:
+	if (WARN_ON_ONCE(preq->opcode != IORING_OP_POLL_ADD)) {
+		ret = -EFAULT;
+		goto out;
+	}
+
 	if (poll_update->update_events || poll_update->update_user_data) {
 		/* only mask one event flags, keep behavior flags */
 		if (poll_update->update_events) {
-- 
2.36.1


  parent reply	other threads:[~2022-06-20  0:26 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-20  0:25 [PATCH for-next 00/10] 5.20 patches Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 01/10] io_uring: fix multi ctx cancellation Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 02/10] io_uring: improve task exit timeout cancellations Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 03/10] io_uring: fix io_poll_remove_all clang warnings Pavel Begunkov
2022-06-21 15:40   ` Nathan Chancellor
2022-06-20  0:25 ` [PATCH for-next 04/10] io_uring: hide eventfd assumptions in evenfd paths Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 05/10] io_uring: introduce locking helpers for CQE posting Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 06/10] io_uring: add io_commit_cqring_flush() Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 07/10] io_uring: opcode independent fixed buf import Pavel Begunkov
2022-06-20  0:25 ` [PATCH for-next 08/10] io_uring: move io_import_fixed() Pavel Begunkov
2022-06-20  0:26 ` [PATCH for-next 09/10] io_uring: consistent naming for inline completion Pavel Begunkov
2022-06-20  0:26 ` Pavel Begunkov [this message]
2022-06-20 11:52 ` [PATCH for-next 00/10] 5.20 patches Jens Axboe

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=ec9a66f1e22f99dcd02288d4e42f3cc6bb357804.1655684496.git.asml.silence@gmail.com \
    [email protected] \
    [email protected] \
    [email protected] \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox