netdev - Re: [Patch net] ipv6: fix rtnl lock assertion failure in ipv6_sock_ac

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Date:	Tue, 02 Sep 2014 23:29:41 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Sabrina Dubroca <sd@...asysnail.net>
Subject: Re: [Patch net] ipv6: fix rtnl lock assertion failure in
 ipv6_sock_ac_join()

Hi Cong,

On Di, 2014-09-02 at 11:07 -0700, Cong Wang wrote:
> @@ -198,7 +198,7 @@ void ipv6_sock_ac_close(struct sock *sk)
>  	spin_unlock_bh(&ipv6_sk_ac_lock);
>  
>  	prev_index = 0;
> -	rcu_read_lock();
> +	rtnl_lock();
>  	while (pac) {
>  		struct ipv6_ac_socklist *next = pac->acl_next;
>  
> @@ -211,7 +211,7 @@ void ipv6_sock_ac_close(struct sock *sk)
>  		sock_kfree_s(sk, pac, sizeof(*pac));
>  		pac = next;
>  	}
> -	rcu_read_unlock();
> +	rtnl_unlock();
>  }
>  

Nit:
You forgot to convert a dev_get_by_index_rcu to __dev_get_by_index in
ipv6_sock_ac_close.

Bye,
Hannes


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