netdev - [PATCH net-next 1/6] net: prefer strscpy over strcpy

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Message-ID: <20240827113527.4019856-2-lihongbo22@huawei.com>
Date: Tue, 27 Aug 2024 19:35:22 +0800
From: Hongbo Li <lihongbo22@...wei.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <dsahern@...nel.org>, <ralf@...ux-mips.org>,
	<jmaloy@...hat.com>, <ying.xue@...driver.com>
CC: <netdev@...r.kernel.org>, <linux-hams@...r.kernel.org>,
	<netfilter-devel@...r.kernel.org>
Subject: [PATCH net-next 1/6] net: prefer strscpy over strcpy

The deprecated helper strcpy() performs no bounds checking on the
destination buffer. This could result in linear overflows beyond
the end of the buffer, leading to all kinds of misbehaviors.
The safe replacement is strscpy() [1].

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]

Signed-off-by: Hongbo Li <lihongbo22@...wei.com>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 0d0b983a6c21..f5e0a0d801fd 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -11121,7 +11121,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 	if (!dev->ethtool)
 		goto free_all;
 
-	strcpy(dev->name, name);
+	strscpy(dev->name, name, sizeof(dev->name));
 	dev->name_assign_type = name_assign_type;
 	dev->group = INIT_NETDEV_GROUP;
 	if (!dev->ethtool_ops)
-- 
2.34.1