[coreboot] NULL pointer dereference in search_bus_device()

[Myles Watson]

> diff --git a/src/devices/device_util.c b/src/devices/device_util.c
> index 9081a36..d761cba 100644
> --- a/src/devices/device_util.c
> +++ b/src/devices/device_util.c
> @@ -583,8 +583,9 @@ void search_bus_resources(struct bus *bus, unsigned
> long type_mask,
>  					if (subbus->link_num
>  					==
IOINDEX_SUBTRACTIVE_LINK(res->index))
>  						break;
> -				search_bus_resources(subbus, type_mask,
type,
> -						     search, gp);
> +				if (subbus)
> +					search_bus_resources(subbus,
type_mask,
> type,
> +								search, gp);
>  				continue;
>  			}
>  			search(gp, curdev, res);

If subbus is NULL, then accessing subbus->link_num is also a problem.

Thanks,
Myles