netdev - [PATCH] net: tlan: replace strlcpy with strscpy

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Message-Id: <20211221071154.729300-1-wangborong@cdjrlc.com>
Date:   Tue, 21 Dec 2021 15:11:54 +0800
From:   Jason Wang <wangborong@...rlc.com>
To:     davem@...emloft.net
Cc:     chessman@....org, kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jason Wang <wangborong@...rlc.com>
Subject: [PATCH] net: tlan: replace strlcpy with strscpy

The strlcpy should not be used because it doesn't limit the source
length. So that it will lead some potential bugs.

But the strscpy doesn't require reading memory from the src string
beyond the specified "count" bytes, and since the return value is
easier to error-check than strlcpy()'s. In addition, the implementation
is robust to the string changing out from underneath it, unlike the
current strlcpy() implementation.

Thus, replace strlcpy with strscpy.

Signed-off-by: Jason Wang <wangborong@...rlc.com>
---
 drivers/net/ethernet/ti/tlan.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c
index 741c42c6a417..b3da76efa8f5 100644
--- a/drivers/net/ethernet/ti/tlan.c
+++ b/drivers/net/ethernet/ti/tlan.c
@@ -762,12 +762,12 @@ static void tlan_get_drvinfo(struct net_device *dev,
 {
 	struct tlan_priv *priv = netdev_priv(dev);
 
-	strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
+	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 	if (priv->pci_dev)
-		strlcpy(info->bus_info, pci_name(priv->pci_dev),
+		strscpy(info->bus_info, pci_name(priv->pci_dev),
 			sizeof(info->bus_info));
 	else
-		strlcpy(info->bus_info, "EISA",	sizeof(info->bus_info));
+		strscpy(info->bus_info, "EISA",	sizeof(info->bus_info));
 }
 
 static int tlan_get_eeprom_len(struct net_device *dev)
-- 
2.34.1