main-loop: Fix GSource leak in qio_task_thread_worker()

After g_source_attach() the GMainContext holds a reference to the
GSource, so the caller does not need to keep it.

qio_task_thread_worker() is not releasing its reference so the GSource
is being leaked since a17536c594bfed94d05667b419f747b692f5fc7f.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <1565625509-404969-2-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/io/task.c b/io/task.c
index 64c4c7126a..1ae7b86488 100644
--- a/io/task.c
+++ b/io/task.c
@@ -136,6 +136,7 @@ static gpointer qio_task_thread_worker(gpointer opaque)
                           qio_task_thread_result, task, NULL);
     g_source_attach(task->thread->completion,
                     task->thread->context);
+    g_source_unref(task->thread->completion);
     trace_qio_task_thread_source_attach(task, task->thread->completion);
 
     qemu_cond_signal(&task->thread_cond);