netdev - [PATCH net-next 3/6] net/netrom: prefer strscpy over strcpy

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Message-ID: <20240827113527.4019856-4-lihongbo22@huawei.com>
Date: Tue, 27 Aug 2024 19:35:24 +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 3/6] net/netrom: 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/netrom/nr_route.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index bd2b17b219ae..e4e8c188cbc9 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -189,7 +189,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
 		}
 
 		nr_node->callsign = *nr;
-		strcpy(nr_node->mnemonic, mnemonic);
+		strscpy(nr_node->mnemonic, mnemonic, sizeof(nr_node->mnemonic));
 
 		nr_node->which = 0;
 		nr_node->count = 1;
@@ -214,7 +214,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
 	nr_node_lock(nr_node);
 
 	if (quality != 0)
-		strcpy(nr_node->mnemonic, mnemonic);
+		strscpy(nr_node->mnemonic, mnemonic, sizeof(nr_node->mnemonic));
 
 	for (found = 0, i = 0; i < nr_node->count; i++) {
 		if (nr_node->routes[i].neighbour == nr_neigh) {
-- 
2.34.1