From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 4 May 2010 06:18:14 +0000 (-0700)
Subject: net: skb_free_datagram_locked() fix
X-Git-Tag: v2.6.35-rc1~473^2~286
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93bb64eac10aad3dae6178d7da94765f207d121f;p=pandora-kernel.git

net: skb_free_datagram_locked() fix

Commit 4b0b72f7dd617b ( net: speedup udp receive path )
introduced a bug in skb_free_datagram_locked().

We should not skb_orphan() skb if we dont have the guarantee we are the
last skb user, this might happen with MSG_PEEK concurrent users.

To keep socket locked for the smallest period of time, we split
consume_skb() logic, inlined in skb_free_datagram_locked()

Reported-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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