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authorAlexey Izbyshev <izbyshev@ispras.ru>2022-10-07 15:23:57 +0300
committerRich Felker <dalias@aerifal.cx>2022-10-19 14:01:32 -0400
commit26c76a908b8613ea8a77d40f3bd51b02f984501c (patch)
tree14c3b07590672b8554ca50f246fe7b55a0283829
parentaebd6a36449e91c06763a40121d558b6cea90d50 (diff)
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fix use of uninitialized dummy_fut in aio_suspend
aio_suspend waits on a dummy futex in the corner case when the array of
requests contains NULL pointers only. But the value of this futex was
left uninitialized, so if it happens to be non-zero, aio_suspend
degrades to spinning instead of blocking.
-rw-r--r--src/aio/aio_suspend.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/aio/aio_suspend.c b/src/aio/aio_suspend.c
index 95def796..1f0c9aaa 100644
--- a/src/aio/aio_suspend.c
+++ b/src/aio/aio_suspend.c
@@ -9,7 +9,7 @@ int aio_suspend(const struct aiocb *const cbs[], int cnt, const struct timespec
 {
 	int i, tid = 0, ret, expect = 0;
 	struct timespec at;
-	volatile int dummy_fut, *pfut;
+	volatile int dummy_fut = 0, *pfut;
 	int nzcnt = 0;
 	const struct aiocb *cb = 0;