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13 June 2022, 11:31:42 UTC
Revision a8d13dbccb137c46fead2ec1a4f1fbc8cfc9ea91 authored by Jens Axboe on 15 January 2021, 23:04:23 UTC, committed by Jens Axboe on 15 January 2021, 23:04:23 UTC 
io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
 
If we enter with requests pending and performm cancelations, we'll have
a different inflight count before and after calling prepare_to_wait().
This causes the loop to restart. If we actually ended up canceling
everything, or everything completed in-between, then we'll break out
of the loop without calling finish_wait() on the waitqueue. This can
trigger a warning on exit_signals(), as we leave the task state in
TASK_UNINTERRUPTIBLE.

Put a finish_wait() after the loop to catch that case.

Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent f010505
History
Tip revision: a8d13dbccb137c46fead2ec1a4f1fbc8cfc9ea91 authored by Jens Axboe on 15 January 2021, 23:04:23 UTC
io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
Tip revision: a8d13db
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