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io-wq: fix ref leak for req in case of exit cancelations 

do_work such as io_wq_submit_work that cancel the work may leave a ref of
req as 1 if we have links. Fix it by call io_run_cancel.

Fixes: 4fb6ac3262 ("io-wq: improve manager/worker handling over exec")
Signed-off-by: yangerkun <yangerkun@huawei.com>
Link: https://lore.kernel.org/r/20210309030410.3294078-1-yangerkun@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
yangerkun 2021-03-09 11:04:10 +08:00 committed by Jens Axboe
parent 7a612350a9
commit 70e3512509
1 changed files with 1 additions and 2 deletions
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fs/io-wq.c
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@ -799,8 +799,7 @@ static void io_wqe_enqueue(struct io_wqe *wqe, struct io_wq_work *work)
/* Can only happen if manager creation fails after exec */
if (io_wq_fork_manager(wqe->wq) ||
test_bit(IO_WQ_BIT_EXIT, &wqe->wq->state)) {
work->flags |= IO_WQ_WORK_CANCEL;
wqe->wq->do_work(work);
io_run_cancel(work, wqe);
return;
}