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io_uring: improve poll warning handling

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Don't try to complete requests if their refs are broken and we've got
a warning, it's much better to drop them and potentially leaking than
double freeing.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/31edf9f96f05d03ab62c114508a231a2dce434cb.1669821213.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-11-30 15:21:54 +00:00 committed by Jens Axboe
parent 047b6aef09
commit c3bfb57ea7
1 changed files with 1 additions and 1 deletions
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2
io_uring/poll.c
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@ -249,7 +249,7 @@ static int io_poll_check_events(struct io_kiocb *req, bool *locked)
if (unlikely(v != 1)) {
/* tw should be the owner and so have some refs */
if (WARN_ON_ONCE(!(v & IO_POLL_REF_MASK)))
return IOU_POLL_DONE;
return IOU_POLL_NO_ACTION;
if (v & IO_POLL_CANCEL_FLAG)
return -ECANCELED;
/*