linux-kernel - Re: 2.6.36.2 - loop on read /proc/net/tcp

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Message-Id: <20101223.093311.226768777.davem@davemloft.net>
Date:	Thu, 23 Dec 2010 09:33:11 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	renton@...ton.name, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: 2.6.36.2 - loop on read /proc/net/tcp

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 23 Dec 2010 06:07:26 +0100

> [PATCH] tcp: fix listening_get_next()
> 
> Alexey Vlasov found /proc/net/tcp could sometime loop and display
> millions of sockets in LISTEN state.
> 
> In 2.6.29, when we converted TCP hash tables to RCU, we left two
> sk_next() calls in listening_get_next().
> 
> We must instead use sk_nulls_next() to properly detect an end of chain.
> 
> Reported-by: Alexey Vlasov <renton@...ton.name>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks everyone.
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