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author | Jens Axboe <axboe@kernel.dk> | 2021-02-23 19:59:06 -0700 |
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committer | Jens Axboe <axboe@kernel.dk> | 2021-02-23 20:33:41 -0700 |
commit | eb2de9418d56b5e6ebf27bad51dbce3e22ee109b (patch) | |
tree | ca26faeedb21d7d419bbd5e4c809dd82516ca4da /fs/io-wq.h | |
parent | 8b3e78b5955abb98863832453f5c74eca8f53c3a (diff) | |
download | linux-eb2de9418d56b5e6ebf27bad51dbce3e22ee109b.tar.bz2 |
io-wq: fix race around io_worker grabbing
There's a small window between lookup dropping the reference to the
worker and calling wake_up_process() on the worker task, where the worker
itself could have exited. We ensure that the worker struct itself is
valid, but worker->task may very well be gone by the time we issue the
wakeup.
Fix the race by using a completion triggered by the reference going to
zero, and having exit wait for that completion before proceeding.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.h')
0 files changed, 0 insertions, 0 deletions