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From:   Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
To:     davem@davemloft.net
Cc:     kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net,
        hawk@kernel.org, john.fastabend@gmail.com, andrii@kernel.org,
        kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
        kpsingh@kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
        Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Subject: [PATCH] rtnetlink: Fix missing error code in rtnl_bridge_notify()
Date:   Wed,  2 Jun 2021 18:15:04 +0800
Message-Id: <1622628904-93532-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Precedence: bulk

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>
---
 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 714d5fa..3e84279 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -4842,8 +4842,10 @@ 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;
-- 
1.8.3.1