netdev - Re: [PATCH net-next v2 1/4] net: hsr: generate supervision frame without HSR/PRP tag

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 8 Feb 2021 11:31:58 -0600
From:   George McCollister <george.mccollister@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jonathan Corbet <corbet@....net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 1/4] net: hsr: generate supervision frame
 without HSR/PRP tag

On Sat, Feb 6, 2021 at 7:26 PM Vladimir Oltean <olteanv@...il.com> wrote:
>
> On Thu, Feb 04, 2021 at 03:59:23PM -0600, George McCollister wrote:
> > @@ -289,23 +286,12 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
> >               hsr->announce_count++;
> >       }
> >
> > -     if (!hsr->prot_version)
> > -             proto = ETH_P_PRP;
> > -     else
> > -             proto = ETH_P_HSR;
> > -
> > -     skb = hsr_init_skb(master, proto);
> > +     skb = hsr_init_skb(master, ETH_P_PRP);
> >       if (!skb) {
> >               WARN_ONCE(1, "HSR: Could not send supervision frame\n");
> >               return;
> >       }
>
> I wonder why you aren't even more aggressive, just remove the proto
> argument from hsr_init_skb and delay setting skb->protocol to
> hsr_fill_tag or the whereabouts. This is probably also more correct
> since as far as I can see, nobody is updating the skb->proto of
> supervision frames from HSR v0 to v1 after your change.

Will do. Thanks.