netdev - [PATCH net-2.6] xfrm: avoid possible oopse in xfrm_alloc

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Date:	Fri, 11 Feb 2011 15:41:35 +0900
From:	Hiroaki SHIMODA <shimoda.hiroaki@...il.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, timo.teras@....fi,
	herbert@...dor.apana.org.au
Subject: [PATCH net-2.6] xfrm: avoid possible oopse in xfrm_alloc_dst

Commit 80c802f3073e84 (xfrm: cache bundles instead of policies for
outgoing flows) introduced possible oopse when dst_alloc returns NULL.

Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@...il.com>
---
 net/xfrm/xfrm_policy.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 8b3ef40..6459588 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1340,10 +1340,13 @@ static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
 	default:
 		BUG();
 	}
-	xdst = dst_alloc(dst_ops) ?: ERR_PTR(-ENOBUFS);
+	xdst = dst_alloc(dst_ops);
 	xfrm_policy_put_afinfo(afinfo);
 
-	xdst->flo.ops = &xfrm_bundle_fc_ops;
+	if (likely(xdst))
+		xdst->flo.ops = &xfrm_bundle_fc_ops;
+	else
+		xdst = ERR_PTR(-ENOBUFS);
 
 	return xdst;
 }

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