From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Tue, 15 Mar 2011 21:08:28 +0000 (+0000)
Subject: xfrm: Force a dst refcount before entering the xfrm type handlers
X-Git-Tag: v2.6.39-rc1~9^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bc07321ccc236f693ce1b6a8786f0a2e38bb87e;p=pandora-kernel.git

xfrm: Force a dst refcount before entering the xfrm type handlers

Crypto requests might return asynchronous. In this case we leave
the rcu protected region, so force a refcount on the skb's
destination entry before we enter the xfrm type input/output
handlers.

This fixes a crash when a route is deleted whilst sending IPsec
data that is transformed by an asynchronous algorithm.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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