netdev - [PATCH] xfrm: Refcount destination entry on xfrm

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Message-ID: <20110316071249.GS31402@secunet.com>
Date:	Wed, 16 Mar 2011 08:12:49 +0100
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	David Miller <davem@...emloft.net>,
	Timo Teräs <timo.teras@....fi>
Cc:	netdev@...r.kernel.org
Subject: [PATCH] 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@...unet.com>
---
 net/xfrm/xfrm_policy.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 027e3c6..15792d8 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1804,6 +1804,8 @@ restart:
 				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;
-- 
1.7.0.4

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