From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 24 Sep 2009 10:49:24 +0000 (+0000)
Subject: net: Fix sock_wfree() race
X-Git-Tag: v2.6.32-rc3~56^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d99927f4d93f36553699573b279e0ff98ad7dea6;p=pandora-kernel.git

net: Fix sock_wfree() race

Commit 2b85a34e911bf483c27cfdd124aeb1605145dc80
(net: No more expensive sock_hold()/sock_put() on each tx)
opens a window in sock_wfree() where another cpu
might free the socket we are working on.

A fix is to call sk->sk_write_space(sk) while still
holding a reference on sk.

Reported-by: Jike Song <albcamus@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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