netdev - [PATCH] xfrm: fix a rcu_read_lock() imbalance in make

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Date:	Tue, 18 Sep 2012 16:40:10 +0800
From:	roy.qing.li@...il.com
To:	netdev@...r.kernel.org
Subject: [PATCH] xfrm: fix a rcu_read_lock() imbalance in make_blackhole

From: Li RongQing <roy.qing.li@...il.com>

if xfrm_policy_get_afinfo returns 0, it has already called rcu_read_unlock,
xfrm_policy_put_afinfo should not be called again.

Signed-off-by: Li RongQing <roy.qing.li@...il.com>
---
 net/xfrm/xfrm_policy.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 741a32a..878835b 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1780,7 +1780,7 @@ static struct dst_entry *make_blackhole(struct net *net, u16 family,
 
 	if (!afinfo) {
 		dst_release(dst_orig);
-		ret = ERR_PTR(-EINVAL);
+		return ERR_PTR(-EINVAL);
 	} else {
 		ret = afinfo->blackhole_route(net, dst_orig);
 	}
-- 
1.7.4.1

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