linux-kernel - [PATCH] net: ip_tunnel: use strscpy to replace strlcpy

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Date:   Mon, 11 Jul 2022 21:55:37 +0800 (GMT+08:00)
From:   "XueBing Chen" <chenxuebing@...i.cn>
To:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        edumazet@...gle.com, pabeni@...hat.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] net: ip_tunnel: use strscpy to replace strlcpy


The strlcpy should not be used because it doesn't limit the source
length. Preferred is strscpy.

Signed-off-by: XueBing Chen <chenxuebing@...i.cn>
---
 net/ipv4/ip_tunnel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 94017a8c3994..4688f00a454c 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -242,7 +242,7 @@ static struct net_device *__ip_tunnel_create(struct net *net,
 	if (parms->name[0]) {
 		if (!dev_valid_name(parms->name))
 			goto failed;
-		strlcpy(name, parms->name, IFNAMSIZ);
+		strscpy(name, parms->name, IFNAMSIZ);
 	} else {
 		if (strlen(ops->kind) > (IFNAMSIZ - 3))
 			goto failed;
@@ -1065,7 +1065,7 @@ int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id,
 
 	memset(&parms, 0, sizeof(parms));
 	if (devname)
-		strlcpy(parms.name, devname, IFNAMSIZ);
+		strscpy(parms.name, devname, IFNAMSIZ);
 
 	rtnl_lock();
 	itn->fb_tunnel_dev = __ip_tunnel_create(net, ops, &parms);
-- 
2.25.1