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iothread: fix crash with invalid properties 

-object iothread,id=foo,? will crash qemu:

qemu-system-x86_64:qemu-thread-posix.c:128: qemu_cond_destroy: Assertion `cond->initialized' failed.

Use thread_id != -1 to check if iothread_complete() finished
successfully and the mutex/cond have been initialized.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180821100716.13803-1-marcandre.lureau@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-08-21 12:07:16 +02:00 committed by Fam Zheng
parent 75e50c80e0
commit 14a2d11825
1 changed files with 6 additions and 3 deletions
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9
iothread.c
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@ -110,6 +110,7 @@ static void iothread_instance_init(Object *obj)
IOThread *iothread = IOTHREAD(obj);
iothread->poll_max_ns = IOTHREAD_POLL_MAX_NS_DEFAULT;
iothread->thread_id = -1;
}
static void iothread_instance_finalize(Object *obj)
@ -117,6 +118,11 @@ static void iothread_instance_finalize(Object *obj)
IOThread *iothread = IOTHREAD(obj);
iothread_stop(iothread);
if (iothread->thread_id != -1) {
qemu_cond_destroy(&iothread->init_done_cond);
qemu_mutex_destroy(&iothread->init_done_lock);
}
/*
* Before glib2 2.33.10, there is a glib2 bug that GSource context
* pointer may not be cleared even if the context has already been
@ -135,8 +141,6 @@ static void iothread_instance_finalize(Object *obj)
g_main_context_unref(iothread->worker_context);
iothread->worker_context = NULL;
}
qemu_cond_destroy(&iothread->init_done_cond);
qemu_mutex_destroy(&iothread->init_done_lock);
}
static void iothread_complete(UserCreatable *obj, Error **errp)
@ -147,7 +151,6 @@ static void iothread_complete(UserCreatable *obj, Error **errp)
iothread->stopping = false;
iothread->running = true;
iothread->thread_id = -1;
iothread->ctx = aio_context_new(&local_error);
if (!iothread->ctx) {
error_propagate(errp, local_error);