Re: [PATCH] vdpa/ifcvf: handle dev_set_name() failure in ifcvf_vdpa_dev_add()

[Zhu Lingshan <lingshan.zhu@kernel.org>]

On Thu, Feb 26, 2026 at 11:31 PM Evgenii Burenchev <evg28bur@yandex.ru> wrote:
>
> dev_set_name() may fail and return an error, but its return value
> is currently ignored and overwritten by _vdpa_register_device().
>
> Abort device creation if dev_set_name() fails and release the
> device reference to avoid continuing with an improperly initialized
> struct device.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Signed-off-by: Evgenii Burenchev <evg28bur@yandex.ru>
> ---
>  drivers/vdpa/ifcvf/ifcvf_main.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> index d46c1606c97a..ab6d6ab3b3d8 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -734,15 +734,22 @@ static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
>                 ret = dev_set_name(&vdpa_dev->dev, "%s", name);
>         else
>                 ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);
> +       if (ret) {
> +               IFCVF_ERR(pdev, "Failed to set device name");
> +               goto err;
> +       }
>
>         ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
>         if (ret) {
> -               put_device(&adapter->vdpa.dev);
>                 IFCVF_ERR(pdev, "Failed to register to vDPA bus");
> -               return ret;
> +               goto err;
>         }
>
>         return 0;
> +
> +err:
> +       put_device(&adapter->vdpa.dev);
> +       return ret;
>  }
>
>  static void ifcvf_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
> --
> 2.43.0
>

Acked-by: Zhu Lingshan <lingshan.zhu@kernel.org>