Steffen Klassert 3bc07321cc 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>
2011-03-27 17:55:01 -07:00
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