[PATCH v2] hw/virtio: Fix leak of host-notifier memory-region

[Yajun Wu via]

If call virtio_queue_set_host_notifier_mr fails, should free
host-notifier memory-region.

Fixes: 44866521bd ("vhost-user: support registering external host notifiers")
Signed-off-by: Yajun Wu <yaj...@nvidia.com>
---
 hw/virtio/vhost-user.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index aec6cc1..3ae5297 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -1474,6 +1474,7 @@ static int 
vhost_user_slave_handle_vring_host_notifier(struct vhost_dev *dev,
     g_free(name);
 
     if (virtio_queue_set_host_notifier_mr(vdev, queue_idx, &n->mr, true)) {
+        object_unparent(OBJECT(&n->mr));
         munmap(addr, page_size);
         return -1;
     }
-- 
1.8.3.1