[PULL 02/35] hw/virtio: Fix leak of host-notifier memory-region

[Michael S. Tsirkin]

From: Yajun Wu <yajunw@nvidia.com>

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 <yajunw@nvidia.com>
Message-Id: <1629077555-19907-1-git-send-email-yajunw@nvidia.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.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 2407836fac..33002300c2 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;
     }
-- 
MST