[PATCH 5.15 21/73] io_uring: fail links when poll fails

Greg Kroah-Hartman
2022-09-02T12:44:33Z

From: Pavel Begunkov <asml.silence@gmail.com>

[ upstream commmit c487a5ad48831afa6784b368ec40d0ee50f2fe1b ]

Don't forget to cancel all linked requests of poll request when
__io_arm_poll_handler() failed.

Fixes: aa43477b04025 ("io_uring: poll rework")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a78aad962460f9fdfe4aa4c0b62425c88f9415bc.1655852245.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[pavel: backport]
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/io_uring.c | 2 ++
1 file changed, 2 insertions(+)

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5844,6 +5844,8 @@ static int io_poll_add(struct io_kiocb *
ipt.pt._qproc = io_poll_queue_proc;

ret = __io_arm_poll_handler(req, &req->poll, &ipt, poll->events);
+ if (!ret && ipt.error)
+ req_set_fail(req);
ret = ret ?: ipt.error;
if (ret)
__io_req_complete(req, issue_flags, ret, 0);