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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-05-04 15:14:29 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-05-04 15:14:29 +0200 |
| commit | fd67a9cf7b733da082e4b6a5f25c19ea7921b4cd (patch) | |
| tree | d3b9b15daa78a73e36a4624021585f916f8646d5 | |
| parent | 066746783d6c6c0f61b39c741177e24a9b398a20 (diff) | |
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aio: fix newp->running data race
* sysdeps/pthread/aio_misc.c (__aio_enqueue_request): Do not write
`running` field of `newp` when a thread was started to process it,
since that thread will not take `__aio_requests_mutex`, and the field
already has the proper value actually.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | sysdeps/pthread/aio_misc.c | 8 |
2 files changed, 12 insertions, 3 deletions
@@ -1,3 +1,10 @@ +2016-05-04 Samuel Thibault <samuel.thibault@ens-lyon.org> + + * sysdeps/pthread/aio_misc.c (__aio_enqueue_request): Do not write + `running` field of `newp` when a thread was started to process it, + since that thread will not take `__aio_requests_mutex`, and the field + already has the proper value actually. + 2016-05-04 Florian Weimer <fweimer@redhat.com> [BZ #19787] diff --git a/sysdeps/pthread/aio_misc.c b/sysdeps/pthread/aio_misc.c index f55570d23b..faf139d901 100644 --- a/sysdeps/pthread/aio_misc.c +++ b/sysdeps/pthread/aio_misc.c @@ -453,7 +453,11 @@ __aio_enqueue_request (aiocb_union *aiocbp, int operation) result = 0; } } + else + newp->running = running; } + else + newp->running = running; /* Enqueue the request in the run queue if it is not yet running. */ if (running == yes && result == 0) @@ -466,9 +470,7 @@ __aio_enqueue_request (aiocb_union *aiocbp, int operation) pthread_cond_signal (&__aio_new_request_notification); } - if (result == 0) - newp->running = running; - else + if (result != 0) { /* Something went wrong. */ __aio_free_request (newp); |