netdev - [PATCH] net: mpls: fix memdup.cocci warning

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Message-ID: <20220406114629.182833-1-gongruiqi1@huawei.com>
Date:   Wed, 6 Apr 2022 19:46:29 +0800
From:   "GONG, Ruiqi" <gongruiqi1@...wei.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Wang Weiyang <wangweiyang2@...wei.com>
Subject: [PATCH] net: mpls: fix memdup.cocci warning

Simply use kmemdup instead of explicitly allocating and copying memory.

Generated by: scripts/coccinelle/api/memdup.cocci

Signed-off-by: GONG, Ruiqi <gongruiqi1@...wei.com>
---
 net/mpls/af_mpls.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index d6fdc5782d33..35b5f806fdda 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1527,10 +1527,9 @@ static int mpls_ifdown(struct net_device *dev, int event)
 					rt->rt_nh_size;
 				struct mpls_route *orig = rt;
 
-				rt = kmalloc(size, GFP_KERNEL);
+				rt = kmemdup(orig, size, GFP_KERNEL);
 				if (!rt)
 					return -ENOMEM;
-				memcpy(rt, orig, size);
 			}
 		}
 
-- 
2.17.1