From: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx> [ Upstream commit cb5d2c1f6cc0e5769099a7d44b9d08cf58cae206 ] Do not call vDPA drivers' callbacks with vq indicies larger than what the drivers indicate that they support. vDPA drivers do not bounds check the indices. Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx> Link: https://lore.kernel.org/r/20210701114652.21956-1-vincent.whitchurch@xxxxxxxx Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> Acked-by: Jason Wang <jasowang@xxxxxxxxxx> Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/virtio/virtio_vdpa.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index 4a9ddb44b2a7..3f95dedccceb 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -149,6 +149,9 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, if (!name) return NULL; + if (index >= vdpa->nvqs) + return ERR_PTR(-ENOENT); + /* Queue shouldn't already be set up. */ if (ops->get_vq_ready(vdpa, index)) return ERR_PTR(-ENOENT); -- 2.30.2
