Re: [PATCH 2/3] c/r: Add UTS support (v6)

["Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Quoting Dan Smith (danms-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):
> +	ret = cr_read_string(ctx, nn, hh.nodename_len);
> +	if (ret < 0)
> +		goto out;
> +
> +	ret = cr_read_string(ctx, dn, hh.domainname_len);
> +	if (ret < 0)
> +		goto out;
> +
> +	ret = sys_unshare(CLONE_NEWUTS);
> +	if (ret)
> +		goto out;
> +
> +	ns = t->nsproxy->uts_ns;
> +	memcpy(ns->name.nodename, nn, hh.nodename_len);
> +	memcpy(ns->name.domainname, dn, hh.domainname_len);

Actually, I think you must make sure the user didn't slip
in a nodename_len which was > sizeof(ns->name.nodename).

-serge