This is a note to let you know that I've just added the patch titled
io_uring/io-wq: free worker if task_work creation is canceled
to the 6.1-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-io-wq-free-worker-if-task_work-creation-is-canceled.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From af82425c6a2d2f347c79b63ce74fca6dc6be157f Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@xxxxxxxxx>
Date: Mon, 2 Jan 2023 16:49:46 -0700
Subject: io_uring/io-wq: free worker if task_work creation is canceled
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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From: Jens Axboe <axboe@xxxxxxxxx>
commit af82425c6a2d2f347c79b63ce74fca6dc6be157f upstream.
If we cancel the task_work, the worker will never come into existance.
As this is the last reference to it, ensure that we get it freed
appropriately.
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: 진호 <wnwlsgh98@xxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/io-wq.c | 1 +
1 file changed, 1 insertion(+)
--- a/io_uring/io-wq.c
+++ b/io_uring/io-wq.c
@@ -1230,6 +1230,7 @@ static void io_wq_cancel_tw_create(struc
worker = container_of(cb, struct io_worker, create_work);
io_worker_cancel_cb(worker);
+ kfree(worker);
}
}
Patches currently in stable-queue which might be from axboe@xxxxxxxxx are
queue-6.1/block-handle-bio_split_to_limits-null-return.patch
queue-6.1/io_uring-poll-attempt-request-issue-after-racy-poll-.patch
queue-6.1/io_uring-io-wq-only-free-worker-if-it-was-allocated-for-creation.patch
queue-6.1/blk-crypto-pass-a-gendisk-to-blk_crypto_sysfs_-un-re.patch
queue-6.1/block-drop-spurious-might_sleep-from-blk_put_queue.patch
queue-6.1/block-mark-blk_put_queue-as-potentially-blocking.patch
queue-6.1/io_uring-fdinfo-include-locked-hash-table-in-fdinfo-output.patch
queue-6.1/block-factor-out-a-blk_debugfs_remove-helper.patch
queue-6.1/block-fix-error-unwinding-in-blk_register_queue.patch
queue-6.1/io_uring-poll-add-hash-if-ready-poll-request-can-t-complete-inline.patch
queue-6.1/block-untangle-request_queue-refcounting-from-sysfs.patch
queue-6.1/io_uring-lock-overflowing-for-iopoll.patch
queue-6.1/io_uring-io-wq-free-worker-if-task_work-creation-is-canceled.patch
queue-6.1/blk-mq-move-the-srcu_struct-used-for-quiescing-to-th.patch
