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hw/virtio: vdpa: Fix leak of host-notifier memory-region 

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

This problem can trigger a coredump with some vDPA drivers (mlx5,
but not with the vdpasim), if we unplug the virtio-net card from
the guest after a stop/start.

The same fix has been done for vhost-user:
  1f89d3b91e ("hw/virtio: Fix leak of host-notifier memory-region")

Fixes: d0416d487b ("vhost-vdpa: map virtqueue notification area if possible")
Cc: jasowang@redhat.com
Resolves: https://bugzilla.redhat.com/2027208
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20220211170259.1388734-1-lvivier@redhat.com>
Cc: qemu-stable@nongnu.org
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Laurent Vivier 2022-02-11 18:02:59 +01:00 committed by Michael S. Tsirkin
parent 0a24dd1fd5
commit 98f7607ecd
1 changed files with 1 additions and 0 deletions
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1
hw/virtio/vhost-vdpa.c
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@ -431,6 +431,7 @@ static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index)
g_free(name);
if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) {
object_unparent(OBJECT(&n->mr));
munmap(addr, page_size);
goto err;
}