This is a note to let you know that I've just added the patch titled io_uring: don't reuse linked_timeout to the 5.9-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-don-t-reuse-linked_timeout.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ff5771613cd7b3a76cd16cb54aa81d30d3c11d48 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov <asml.silence@xxxxxxxxx> Date: Tue, 20 Oct 2020 23:50:27 +0100 Subject: io_uring: don't reuse linked_timeout From: Pavel Begunkov <asml.silence@xxxxxxxxx> commit ff5771613cd7b3a76cd16cb54aa81d30d3c11d48 upstream. Clear linked_timeout for next requests in __io_queue_sqe() so we won't queue it up unnecessary when it's going to be punted. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v5.9 Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/io_uring.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -6249,8 +6249,10 @@ err: if (nxt) { req = nxt; - if (req->flags & REQ_F_FORCE_ASYNC) + if (req->flags & REQ_F_FORCE_ASYNC) { + linked_timeout = NULL; goto punt; + } goto again; } exit: Patches currently in stable-queue which might be from asml.silence@xxxxxxxxx are queue-5.9/io_uring-stash-ctx-task-reference-for-sqpoll.patch queue-5.9/io_uring-return-cancelation-status-from-poll-timeout-files-handlers.patch queue-5.9/io-wq-fix-use-after-free-in-io_wq_worker_running.patch queue-5.9/io_uring-don-t-rely-on-weak-files-references.patch queue-5.9/io_uring-allow-timeout-poll-files-killing-to-take-task-into-account.patch queue-5.9/io_uring-move-dropping-of-files-into-separate-helper.patch queue-5.9/io_uring-unconditionally-grab-req-task.patch queue-5.9/io_uring-enable-task-files-specific-overflow-flushing.patch queue-5.9/io_uring-don-t-reuse-linked_timeout.patch