linux-kernel - Re: [PATCH] mptcp: bugfix for RM

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Date:   Mon, 8 Jun 2020 18:59:29 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Matthieu Baerts <matthieu.baerts@...sares.net>
Cc:     Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Peter Krystad <peter.krystad@...ux.intel.com>,
        netdev@...r.kernel.org, mptcp@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mptcp: bugfix for RM_ADDR option parsing

On Mon, Jun 08, 2020 at 12:10:23PM +0200, Matthieu Baerts wrote:
> Hi Geliang,
> 
> On 08/06/2020 09:48, Geliang Tang wrote:
> > In MPTCPOPT_RM_ADDR option parsing, the pointer "ptr" pointed to the
> > "Subtype" octet, the pointer "ptr+1" pointed to the "Address ID" octet:
> > 
> >    +-------+-------+---------------+
> >    |Subtype|(resvd)|   Address ID  |
> >    +-------+-------+---------------+
> >    |               |
> >   ptr            ptr+1
> > 
> > We should set mp_opt->rm_id to the value of "ptr+1", not "ptr". This patch
> > will fix this bug.
> 
> Thank you for the patch, good catch!
> Indeed "ptr" should be incremented.
> 
> Because this is a bug-fix for net, may you clearly indicate that in the
> subject to help -net maintainers please? [PATCH net v2]
> 
> Also, may you add a "Fixes" tag as well as it is for -net ? I guess it
> should be:
> 
>     Fixes: 3df523ab582c ("mptcp: Add ADD_ADDR handling")
> 
> The rest is good!
> 
> Cheers,
> Matt
> -- 
> Matthieu Baerts | R&D Engineer
> matthieu.baerts@...sares.net
> Tessares SA | Hybrid Access Solutions
> www.tessares.net
> 1 Avenue Jean Monnet, 1348 Louvain-la-Neuve, Belgium

Hi Matt,

Thanks for your reply.

I have already resend patch v2 to you.

-Geliang