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xfrm: Refcount destination entry on xfrm_lookup 

We return a destination entry without refcount if a socket
policy is found in xfrm_lookup. This triggers a warning on
a negative refcount when freeeing this dst entry. So take
a refcount in this case to fix it.

This refcount was forgotten when xfrm changed to cache bundles
instead of policies for outgoing flows.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steffen Klassert 2011-03-15 21:12:49 +00:00 committed by David S. Miller
parent 8a4eb5734e
commit fbd5060875
1 changed files with 2 additions and 0 deletions
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2
net/xfrm/xfrm_policy.c
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@ -1804,6 +1804,8 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
goto no_transform;
}
dst_hold(&xdst->u.dst);
spin_lock_bh(&xfrm_policy_sk_bundle_lock);
xdst->u.dst.next = xfrm_policy_sk_bundles;
xfrm_policy_sk_bundles = &xdst->u.dst;