[PATCH 5.10 62/64] io_uring/io-wq: free worker if task_work creation is canceled

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

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
@@ -1217,6 +1217,7 @@ static void io_wq_cancel_tw_create(struc
 
 		worker = container_of(cb, struct io_worker, create_work);
 		io_worker_cancel_cb(worker);
+		kfree(worker);
 	}
 }