vhost-vsock: detach the virqueue element in case of error

vhost-vsock: detach the virqueue element in case of error

In vhost_vsock_common_send_transport_reset(), if an element popped from
the virtqueue is invalid, we should call virtqueue_detach_element() to
detach it from the virtqueue before freeing its memory.

Fixes: fc0b9b0e1c ("vhost-vsock: add virtio sockets device")
Fixes: CVE-2022-26354
Cc: qemu-stable@nongnu.org
Reported-by: VictorV <vv474172261@gmail.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20220228095058.27899-1-sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>