| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 299/846] io_uring: remove double poll on poll update | Date | Mon, 24 Jan 2022 19:36:56 +0100 |
| |
From: Pavel Begunkov <asml.silence@gmail.com>
[ Upstream commit e840b4baf3cfb37e2ead4f649a45bb78178677ff ]
Before updating a poll request we should remove it from poll queues, including the double poll entry.
Fixes: b69de288e913 ("io_uring: allow events and user_data update of running poll requests") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/ac39e7f80152613603b8a6cc29a2b6063ac2434f.1639605189.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/io_uring.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 0006fc7479ca3..ecffeddf90c68 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5925,6 +5925,7 @@ static int io_poll_update(struct io_kiocb *req, unsigned int issue_flags) * update those. For multishot, if we're racing with completion, just * let completion re-add it. */ + io_poll_remove_double(preq); completing = !__io_poll_remove_one(preq, &preq->poll, false); if (completing && (preq->poll.events & EPOLLONESHOT)) { ret = -EALREADY; -- 2.34.1
|