From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 23 Dec 2010 17:32:46 +0000 (-0800)
Subject: tcp: fix listening_get_next()
X-Git-Tag: v2.6.37-rc8~13^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1bde5ac49398a064c753bb490535cfad89e99a5f;p=pandora-kernel.git

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@renton.name>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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