linux-kernel - [PATCH net-next] net: caif: Add a missing rcu_read_unlock() in caif_flow

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Message-ID: <20180719022713.17324-1-yuehaibing@huawei.com>
Date:   Thu, 19 Jul 2018 10:27:13 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <davem@...emloft.net>, <dmitry.tarnyagin@...kless.no>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH net-next] net: caif: Add a missing rcu_read_unlock() in caif_flow_cb

Add a missing rcu_read_unlock in the error path

Fixes: c95567c80352 ("caif: added check for potential null return")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 net/caif/caif_dev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
index e0adcd1..711d715 100644
--- a/net/caif/caif_dev.c
+++ b/net/caif/caif_dev.c
@@ -131,8 +131,10 @@ static void caif_flow_cb(struct sk_buff *skb)
 	caifd = caif_get(skb->dev);
 
 	WARN_ON(caifd == NULL);
-	if (caifd == NULL)
+	if (!caifd) {
+		rcu_read_unlock();
 		return;
+	}
 
 	caifd_hold(caifd);
 	rcu_read_unlock();
-- 
2.7.0