linux-kernel - Re: [PATCH net v2] ipv6: fix rtnl locking in setsockopt for anycast and multicast

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Message-Id: <20140905.115305.809714259412705649.davem@davemloft.net>
Date:	Fri, 05 Sep 2014 11:53:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sd@...asysnail.net
Cc:	hannes@...essinduktion.org, cwang@...pensource.com,
	tt.rantala@...il.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, trinity@...r.kernel.org,
	davej@...hat.com
Subject: Re: [PATCH net v2] ipv6: fix rtnl locking in setsockopt for
 anycast and multicast

From: Sabrina Dubroca <sd@...asysnail.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@...il.com>
> Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
> Reported-by: Tommi Rantala <tt.rantala@...il.com>

Applied and queued up for -stable, thanks.
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