io_uring: fail links when poll fails

[ 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>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 2c8cc3180fb48c2a11da643aa2da67294aa27f78..2eb33d0fa55043790d0ed26e1db07cc316ffb2e0 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5844,6 +5844,8 @@ static int io_poll_add(struct io_kiocb *req, unsigned int issue_flags)
        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);