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
next prev 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
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