tree db70ccc1196e4b9a691f8a44d85ba7eb732c4b60
parent f010505b78a4fa8d5b6480752566e7313fb5ca6e
author Jens Axboe <axboe@kernel.dk> 1610751863 -0700
committer Jens Axboe <axboe@kernel.dk> 1610751863 -0700

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>