Re: [PATCH] virtio-rng: block max-bytes=0

[Amit Shah]

On Wed, 2024-07-24 at 06:51 -0400, Michael S. Tsirkin wrote:
> with max-bytes set to 0, quota is 0 and so device does not work.
> block this to avoid user confusion
> 
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  hw/virtio/virtio-rng.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
> index f74efffef7..7cf31da071 100644
> --- a/hw/virtio/virtio-rng.c
> +++ b/hw/virtio/virtio-rng.c
> @@ -184,8 +184,9 @@ static void virtio_rng_device_realize(DeviceState
> *dev, Error **errp)
>  
>      /* Workaround: Property parsing does not enforce unsigned
> integers,
>       * So this is a hack to reject such numbers. */
> -    if (vrng->conf.max_bytes > INT64_MAX) {
> -        error_setg(errp, "'max-bytes' parameter must be non-
> negative, "
> +    if (vrng->conf.max_bytes == 0 ||
> +        vrng->conf.max_bytes > INT64_MAX) {
> +        error_setg(errp, "'max-bytes' parameter must be positive, "
>                     "and less than 2^63");
>          return;
>      }

Reviewed-by: Amit Shah <amit@kernel.org>