netdev - Re: [PATCH net] ipv6: tcp: add rcu locking in tcp_v6_send

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Message-Id: <20160110.225953.2100331012103485299.davem@davemloft.net>
Date:	Sun, 10 Jan 2016 22:59:53 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	davej@...emonkey.org.uk, netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: tcp: add rcu locking in tcp_v6_send_synack()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Fri, 08 Jan 2016 09:35:51 -0800

> From: Eric Dumazet <edumazet@...gle.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@...emonkey.org.uk>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied and queued up for -stable, thanks Eric.