From: Eric Dumazet <edumazet@google.com>
Date: Fri, 8 Jun 2012 06:25:00 +0000 (+0000)
Subject: l2tp: fix a race in l2tp_ip_sendmsg()
X-Git-Tag: v3.2.23~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b73845cd7629c3b944542999b8e69989a4dd70e;p=pandora-kernel.git

l2tp: fix a race in l2tp_ip_sendmsg()

[ Upstream commit 4399a4df98a63e30fd16e9d0cecc46ea92269e8f ]

Commit 081b1b1bb27f (l2tp: fix l2tp_ip_sendmsg() route handling) added
a race, in case IP route cache is disabled.

In this case, we should not do the dst_release(&rt->dst), since it'll
free the dst immediately, instead of waiting a RCU grace period.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Chapman <jchapman@katalix.com>
Cc: Denys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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