| commit | e523a29c4f2703bdb98f68ce1bb256e259fd8d5f | [log] [tgz] |
|---|---|---|
| author | Stefan Bühler <source@stbuehler.de> | Fri Apr 19 11:57:44 2019 +0200 |
| committer | Jens Axboe <axboe@kernel.dk> | Mon Apr 22 11:00:55 2019 -0600 |
| tree | 0ba64403279546f48c7a7839c935ddbc110fa7df | |
| parent | 35fa71a030caa50458a043560d4814ea9bcd639f [diff] |
io_uring: fix race condition reading SQ entries A read memory barrier is required between reading SQ tail and reading the actual data belonging to the SQ entry. Userspace needs a matching write barrier between writing SQ entries and updating SQ tail (using smp_store_release to update tail will do). Signed-off-by: Stefan Bühler <source@stbuehler.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>