io_uring: fix race with canceling timeouts

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If we get -1 from hrtimer_try_to_cancel(), we know that the timer
is running. Hence leave all completion to the timeout handler. If
we don't, we can corrupt the list and miss a completion.

Fixes: 11365043e5 ("io_uring: add support for canceling timeout requests")
Reported-by: Hrvoje Zeba <zeba.hrvoje@gmail.com>
Tested-by: Hrvoje Zeba <zeba.hrvoje@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2019-10-29 12:34:10 -06:00

parent 65e19f54d2

commit 842f96124c

1 changed files with 8 additions and 12 deletions

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fs/io_uring.c

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