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Message-ID: <202010301217.7EF0009E83@keescook> Date: Fri, 30 Oct 2020 12:25:38 -0700 From: Kees Cook <keescook@...omium.org> To: laniel_francis@...vacyrequired.com Cc: linux-hardening@...r.kernel.org, netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org Subject: Re: [PATCH v4 2/3] Modify return value of nla_strlcpy to match that of strscpy. On Fri, Oct 30, 2020 at 04:36:46PM +0100, laniel_francis@...vacyrequired.com wrote: > diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c > index 2a76a2f5ed88..f9b053b30a7b 100644 > --- a/net/sched/sch_api.c > +++ b/net/sched/sch_api.c > @@ -1170,7 +1170,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev, > #ifdef CONFIG_MODULES > if (ops == NULL && kind != NULL) { > char name[IFNAMSIZ]; > - if (nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { > + if (nla_strlcpy(name, kind, IFNAMSIZ) > 0) { > /* We dropped the RTNL semaphore in order to > * perform the module load. So, even if we > * succeeded in loading the module we have to Oops, I think this should be >= 0 ? -- Kees Cook
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