Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Jiapeng Chong <jiapeng.chong@linux.alibaba.com>,
        Abaci Robot <abaci@linux.alibaba.com>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 11/71] rtnetlink: Fix missing error code in rtnl_bridge_notify()
Date:   Mon, 28 Jun 2021 10:39:03 -0400
Message-Id: <20210628144003.34260-12-sashal@kernel.org>
In-Reply-To: <20210628144003.34260-1-sashal@kernel.org>
References: <20210628144003.34260-1-sashal@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>

[ Upstream commit a8db57c1d285c758adc7fb43d6e2bad2554106e1 ]

The error code is missing in this code scenario, add the error code
'-EINVAL' to the return value 'err'.

Eliminate the follow smatch warning:

net/core/rtnetlink.c:4834 rtnl_bridge_notify() warn: missing error code
'err'.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/core/rtnetlink.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index e652e376fb30..93de31ca3d65 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3530,8 +3530,10 @@ static int rtnl_bridge_notify(struct net_device *dev)
 	if (err < 0)
 		goto errout;
 
-	if (!skb->len)
+	if (!skb->len) {
+		err = -EINVAL;
 		goto errout;
+	}
 
 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 	return 0;
-- 
2.30.2