netdev - Re: [PATCH net] macvlan: fix a race on port dismantle and possible skb leaks

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Date:	Sat, 25 Oct 2014 16:24:21 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net] macvlan: fix a race on port dismantle and possible
 skb leaks

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Thu, 23 Oct 2014 11:28:58 +0800

> On Wed, Oct 22, 2014 at 07:43:46PM -0700, Eric Dumazet wrote:
>> From: Eric Dumazet <edumazet@...gle.com>
>> 
>> We need to cancel the work queue after rcu grace period,
>> otherwise it can be rescheduled by incoming packets.
>> 
>> We need to purge queue if some skbs are still in it.
>> 
>> We can use __skb_queue_head_init() variant in
>> macvlan_process_broadcast()
>> 
>> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
>> Fixes: 412ca1550cbec ("macvlan: Move broadcasts into a work queue")
>> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> 
> Good catch! Your fix looks good to me.

Applied and queued up for -stable, thanks everyone.
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