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

On Fri, Sep 5, 2014 at 11:53 AM, David Miller <[email protected]> wrote:
> From: Sabrina Dubroca <[email protected]>
> 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 <[email protected]>
>> Signed-off-by: Sabrina Dubroca <[email protected]>
>> Reported-by: Tommi Rantala <[email protected]>
>
> 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.)