This is a note to let you know that I've just added the patch titled io_uring: fail links when poll fails to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: io_uring-fail-links-when-poll-fails.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Thu Sep 1 11:59:31 AM CEST 2022 From: Pavel Begunkov <asml.silence@xxxxxxxxx> Date: Mon, 29 Aug 2022 14:30:22 +0100 Subject: io_uring: fail links when poll fails To: stable@xxxxxxxxxxxxxxx Cc: Jens Axboe <axboe@xxxxxxxxx>, asml.silence@xxxxxxxxx Message-ID: <e9e78439b420e0b502fe7db89f5424c717a7ddca.1661594698.git.asml.silence@xxxxxxxxx> From: Pavel Begunkov <asml.silence@xxxxxxxxx> [ 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@xxxxxxxxx> Link: https://lore.kernel.org/r/a78aad962460f9fdfe4aa4c0b62425c88f9415bc.1655852245.git.asml.silence@xxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> [pavel: backport] Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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); Patches currently in stable-queue which might be from asml.silence@xxxxxxxxx are queue-5.15/io_uring-fix-wrong-arm_poll-error-handling.patch queue-5.15/io_uring-poll-rework.patch queue-5.15/io_uring-remove-unused-function-req_ref_put.patch queue-5.15/io_uring-fail-links-when-poll-fails.patch queue-5.15/io_uring-inline-io_poll_complete.patch queue-5.15/io_uring-bump-poll-refs-to-full-31-bits.patch queue-5.15/io_uring-clean-cqe-filling-functions.patch queue-5.15/io_uring-fix-uaf-due-to-missing-pollfree-handling.patch queue-5.15/io_uring-correct-fill-events-helpers-types.patch queue-5.15/io_uring-refactor-poll-update.patch queue-5.15/io_uring-kill-poll-linking-optimisation.patch queue-5.15/io_uring-remove-poll-entry-from-list-when-canceling-all.patch queue-5.15/io_uring-move-common-poll-bits.patch