From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] ipv6: tcp: add rcu locking in tcp_v6_send_synack()
Date: Sun, 10 Jan 2016 22:59:53 -0500 (EST)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 08 Jan 2016 09:35:51 -0800

> From: Eric Dumazet <edumazet@google.com>
> 
> When first SYNACK is sent, we already hold rcu_read_lock(), but this
> is not true if a SYNACK is retransmitted, as a timer (soft) interrupt
> does not hold rcu_read_lock()
> 
> Fixes: 45f6fad84cc30 ("ipv6: add complete rcu protection around np->opt")
> Reported-by: Dave Jones <davej@codemonkey.org.uk>
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied and queued up for -stable, thanks Eric.