From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Subject: Re: [PATCH net v2] ipv6: fix rtnl locking in setsockopt for anycast
 and multicast
Date: Fri, 05 Sep 2014 21:12:56 +0200
Message-ID: <1409944376.5306.9.camel@localhost>
References: <20140901210520.GB25543@kria>
	 <1409610378.21965.52.camel@localhost> <20140902082929.GA8483@kria>
	 <20140905.115305.809714259412705649.davem@davemloft.net>
	 <CAHA+R7M1qd5g1ta=YFqefgXDf1EfF2_VsJGUvH6Dd+ttnHc_VQ@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Cc: David Miller <davem@davemloft.net>,
	Sabrina Dubroca <sd@queasysnail.net>,
	Tommi Rantala <tt.rantala@gmail.com>,
	Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
	James Morris <jmorris@namei.org>,
	Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
	Patrick McHardy <kaber@trash.net>,
	netdev <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	trinity@vger.kernel.org, Dave Jones <davej@redhat.com>
To: Cong Wang <cwang@twopensource.com>
Return-path: <trinity-owner@vger.kernel.org>
In-Reply-To: <CAHA+R7M1qd5g1ta=YFqefgXDf1EfF2_VsJGUvH6Dd+ttnHc_VQ@mail.gmail.com>
Sender: trinity-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

On Fr, 2014-09-05 at 11:58 -0700, Cong Wang wrote:
> On Fri, Sep 5, 2014 at 11:53 AM, David Miller <davem@davemloft.net> wrote:
> > From: Sabrina Dubroca <sd@queasysnail.net>
> > Date: Tue, 2 Sep 2014 10:29:29 +0200
> >
> >> Calling setsockopt with IPV6_JOIN_ANYCAST or IPV6_LEAVE_ANYCAST
> >> triggers the assertion in addrconf_join_solict()/addrconf_leave_solict()
> >>
> >> ipv6_sock_ac_join(), ipv6_sock_ac_drop(), ipv6_sock_ac_close() need to
> >> take RTNL before calling ipv6_dev_ac_inc/dec. Same thing with
> >> ipv6_sock_mc_join(), ipv6_sock_mc_drop(), ipv6_sock_mc_close() before
> >> calling ipv6_dev_mc_inc/dec.
> >>
> >> This patch moves ASSERT_RTNL() up a level in the call stack.
> >>
> >> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
> >> Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
> >> Reported-by: Tommi Rantala <tt.rantala@gmail.com>
> >
> > Applied and queued up for -stable, thanks.
> 
> I believe you applied a wrong version, at least the following
> is not correct:
> 
> +       if (!dev)
> +               return -ENODEV;
> 
> Sabrina took that from my draft patch, but they all don't
> realize this is wrong.
> 
> (I did provide a correct version which is just ignored by you.)

What games are you playing? You know how patches are processed by David
and I even let him the choice by pointing out a problem in your patch so
that you could an update and send v2.

I really feel miffed about your behavior!

Anyway, I saw the hunk adding the return -ENODEV and didn't see any
problems with it. Sure it might be better if it would gone into a
separate patch. Can you elaborate what problems you see?

Thanks,
Hannes