netdev - [PATCH] xfrm: fix rcu_read_unlock usage in xfrm_local

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Date:   Tue, 13 Mar 2018 17:26:07 +0900
From:   Taehee Yoo <ap420073@...il.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, steffen.klassert@...unet.com,
        Taehee Yoo <ap420073@...il.com>
Subject: [PATCH] xfrm: fix rcu_read_unlock usage in xfrm_local_error

In the xfrm_local_error, rcu_read_unlock should be called when afinfo
is not NULL. because xfrm_state_get_afinfo calls rcu_read_unlock
if afinfo is NULL.

Signed-off-by: Taehee Yoo <ap420073@...il.com>
---
 net/xfrm/xfrm_output.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 2346867..89b178a7 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -285,8 +285,9 @@ void xfrm_local_error(struct sk_buff *skb, int mtu)
 		return;
 
 	afinfo = xfrm_state_get_afinfo(proto);
-	if (afinfo)
+	if (afinfo) {
 		afinfo->local_error(skb, mtu);
-	rcu_read_unlock();
+		rcu_read_unlock();
+	}
 }
 EXPORT_SYMBOL_GPL(xfrm_local_error);
-- 
2.9.3