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Fix race in POSIX AIO emulation (Jan Kiszka)
[qemu]
/
posix-aio-compat.c
diff --git
a/posix-aio-compat.c
b/posix-aio-compat.c
index
92ec234
..
c919e3b
100644
(file)
--- a/
posix-aio-compat.c
+++ b/
posix-aio-compat.c
@@
-81,21
+81,16
@@
static void *aio_thread(void *unused)
if (len == -1 && errno == EINTR)
continue;
else if (len == -1) {
if (len == -1 && errno == EINTR)
continue;
else if (len == -1) {
- pthread_mutex_lock(&lock);
- aiocb->ret = -errno;
- pthread_mutex_unlock(&lock);
+ offset = -errno;
break;
} else if (len == 0)
break;
offset += len;
break;
} else if (len == 0)
break;
offset += len;
-
- pthread_mutex_lock(&lock);
- aiocb->ret = offset;
- pthread_mutex_unlock(&lock);
}
pthread_mutex_lock(&lock);
}
pthread_mutex_lock(&lock);
+ aiocb->ret = offset;
idle_threads++;
pthread_mutex_unlock(&lock);
idle_threads++;
pthread_mutex_unlock(&lock);