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Date:   Wed, 24 Apr 2019 11:47:15 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net-next] tipc: tipc_udp_recv() cleanup vs rcu verbs

From: Eric Dumazet <>
Date: Tue, 23 Apr 2019 09:24:46 -0700

> First thing tipc_udp_recv() does is to use rcu_dereference_sk_user_data(),
> and this is really hinting we already own rcu_read_lock() from the caller
> (UDP stack).
> No need to add another rcu_read_lock()/rcu_read_unlock() pair.
> Also use rcu_dereference() instead of rcu_dereference_rtnl()
> in the data path.
> Signed-off-by: Eric Dumazet <>

Applied, thanks Eric.

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