Re: [PATCH 3/5] net/netfilter/ipvs/ip_vs_ctl.c: drop argument range check just before the check for equality

From: Dan Carpenter
Date: Tue Jul 22 2014 - 05:15:58 EST


On Tue, Jul 22, 2014 at 11:52:02AM +0300, Julian Anastasov wrote:
> > > - if (copylen > 128)
> > > + if (*len < (int) copylen || *len < 0) {
> > > + pr_err("get_ctl: len %d < %u\n", *len, copylen);
> >
> > Don't let users flood dmesg. Just return an error. (This can be
> > triggered by non-root as well).
>
> For now both set and get are privileged operations,
> so we can keep it, it can catch if something wrong happens
> with the structure sizes.

If you have namespaces enabled then it's not *that* privaleged.

regards,
dan carpenter

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/