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Date:	Wed, 23 Jul 2014 10:18:06 +0200
From:	Steffen Klassert <>
To:	David Miller <>
CC:	Herbert Xu <>,
	Steffen Klassert <>,
Subject: [PATCH 1/2] xfrm: Fix refcount imbalance in xfrm_lookup

xfrm_lookup must return a dst_entry with a refcount for the caller.
Git commit 1a1ccc96abb ("xfrm: Remove caching of xfrm_policy_sk_bundles")
removed this refcount for the socket policy case accidentally.
This patch restores it and sets DST_NOCACHE flag to make sure
that the dst_entry is freed when the refcount becomes null.

Fixes: 1a1ccc96abb ("xfrm: Remove caching of xfrm_policy_sk_bundles")
Signed-off-by: Steffen Klassert <>
 net/xfrm/xfrm_policy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index a8ef510..0525d78 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2097,6 +2097,8 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
 				goto no_transform;
+			dst_hold(&xdst->u.dst);
+			xdst->u.dst.flags |= DST_NOCACHE;
 			route = xdst->route;

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