linux-kernel - [PATCH net-next] ipv6: sr: Use kmemdup instead of duplicating it in parse_nla

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Message-ID: <20180723083319.19144-1-yuehaibing@huawei.com>
Date:   Mon, 23 Jul 2018 16:33:19 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <davem@...emloft.net>, <kuznet@....inr.ac.ru>,
        <yoshfuji@...ux-ipv6.org>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH net-next] ipv6: sr: Use kmemdup instead of duplicating it in parse_nla_srh

Replace calls to kmalloc followed by a memcpy with a direct call to
kmemdup.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 net/ipv6/seg6_local.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c
index cd6e4ca..e1025b4 100644
--- a/net/ipv6/seg6_local.c
+++ b/net/ipv6/seg6_local.c
@@ -637,12 +637,10 @@ static int parse_nla_srh(struct nlattr **attrs, struct seg6_local_lwt *slwt)
 	if (!seg6_validate_srh(srh, len))
 		return -EINVAL;
 
-	slwt->srh = kmalloc(len, GFP_KERNEL);
+	slwt->srh = kmemdup(srh, len, GFP_KERNEL);
 	if (!slwt->srh)
 		return -ENOMEM;
 
-	memcpy(slwt->srh, srh, len);
-
 	slwt->headroom += len;
 
 	return 0;
-- 
2.7.0