Files
linux-stable-mirror/fs
Jens Axboe b2e720ace2 io_uring: fix race around poll update and poll triggering
Joakim reports that in some conditions he sees a multishot poll request
being canceled, and that it coincides with getting -EALREADY on
modification. As part of the poll update procedure, there's a small window
where the request is marked as canceled, and if this coincides with the
event actually triggering, then we can get a spurious -ECANCELED and
termination of the multishot request.

Don't mark the poll request as being canceled for update. We also don't
care if we race on removal unless it's a one-shot request, we can safely
updated for either case.

Fixes: b69de288e9 ("io_uring: allow events and user_data update of running poll requests")
Reported-by: Joakim Hassila <joj@mac.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-11 19:30:17 -06:00
..
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-04-07 21:30:27 -05:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-02-24 13:38:26 -08:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-02-26 09:41:05 -08:00
2021-02-24 13:38:26 -08:00
2021-02-24 13:38:26 -08:00
2021-01-24 14:27:19 +01:00
2021-01-29 10:06:46 +05:30
2021-02-24 13:38:26 -08:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:19 +01:00
2021-01-21 14:06:00 -07:00
2021-01-24 14:27:20 +01:00
2021-02-13 17:17:53 +01:00
2021-01-24 14:27:18 +01:00