netdev - Re: [PATCH net] net: bridge: multicast: use rcu to access port list from br_multicast_start

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Message-Id: <20190411.111653.1887675087098656430.davem@davemloft.net>
Date:   Thu, 11 Apr 2019 11:16:53 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     nikolay@...ulusnetworks.com
Cc:     netdev@...r.kernel.org, herbert@...dor.apana.org.au,
        roopa@...ulusnetworks.com, bridge@...ts.linux-foundation.org
Subject: Re: [PATCH net] net: bridge: multicast: use rcu to access port
 list from br_multicast_start_querier

From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Date: Thu, 11 Apr 2019 15:08:25 +0300

> br_multicast_start_querier() walks over the port list but it can be
> called from a timer with only multicast_lock held which doesn't protect
> the port list, so use RCU to walk over it.
> 
> Fixes: c83b8fab06fc ("bridge: Restart queries when last querier expires")
> Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>

Applied and queued up for -stable, thanks.