From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
Subject: [PATCH 2/4] io_uring: fix missing io_queue_linked_timeout()
Date: Sat, 25 Jul 2020 14:41:59 +0300 [thread overview]
Message-ID: <9408827d175b704f27a7577f8d12e755f9910162.1595677308.git.asml.silence@gmail.com> (raw)
In-Reply-To: <cover.1595677308.git.asml.silence@gmail.com>
Whoever called io_prep_linked_timeout() should also do
io_queue_linked_timeout(). __io_queue_sqe() doesn't follow that for the
punting path leaving linked timeouts prepared but never queued.
Fixes: 6df1db6b54243 ("io_uring: fix mis-refcounting linked timeouts")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 59f1f473ffc7..3e406bc1f855 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5987,20 +5987,20 @@ static void __io_queue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
* doesn't support non-blocking read/write attempts
*/
if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
- if (io_arm_poll_handler(req)) {
- if (linked_timeout)
- io_queue_linked_timeout(linked_timeout);
- goto exit;
- }
+ if (!io_arm_poll_handler(req)) {
punt:
- ret = io_prep_work_files(req);
- if (unlikely(ret))
- goto err;
- /*
- * Queued up for async execution, worker will release
- * submit reference when the iocb is actually submitted.
- */
- io_queue_async_work(req);
+ ret = io_prep_work_files(req);
+ if (unlikely(ret))
+ goto err;
+ /*
+ * Queued up for async execution, worker will release
+ * submit reference when the iocb is actually submitted.
+ */
+ io_queue_async_work(req);
+ }
+
+ if (linked_timeout)
+ io_queue_linked_timeout(linked_timeout);
goto exit;
}
--
2.24.0
next prev parent reply other threads:[~2020-07-25 11:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-25 11:41 [PATCH 0/4] 5.9 fixes Pavel Begunkov
2020-07-25 11:41 ` [PATCH 1/4] io_uring: mark ->work uninitialised after cleanup Pavel Begunkov
2020-07-25 11:41 ` Pavel Begunkov [this message]
2020-07-25 11:42 ` [PATCH 3/4] io-wq: update hash bits Pavel Begunkov
2020-07-25 11:42 ` [PATCH 4/4] io_uring: fix racy req->flags modification Pavel Begunkov
2020-07-25 15:48 ` [PATCH 0/4] 5.9 fixes Jens Axboe
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