netdev - [PATCH 2/4] can: peak_usb: force the string buffer NULL-terminated

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Message-Id: <20190802120038.18154-3-mkl@pengutronix.de>
Date:   Fri,  2 Aug 2019 14:00:36 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, linux-can@...r.kernel.org,
        kernel@...gutronix.de, Wang Xiayang <xywang.sjtu@...u.edu.cn>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 2/4] can: peak_usb: force the string buffer NULL-terminated

From: Wang Xiayang <xywang.sjtu@...u.edu.cn>

strncpy() does not ensure NULL-termination when the input string size
equals to the destination buffer size IFNAMSIZ. The output string is
passed to dev_info() which relies on the NULL-termination.

Use strlcpy() instead.

This issue is identified by a Coccinelle script.

Signed-off-by: Wang Xiayang <xywang.sjtu@...u.edu.cn>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/usb/peak_usb/pcan_usb_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index 22b9c8e6d040..65dce642b86b 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -855,7 +855,7 @@ static void peak_usb_disconnect(struct usb_interface *intf)
 
 		dev_prev_siblings = dev->prev_siblings;
 		dev->state &= ~PCAN_USB_STATE_CONNECTED;
-		strncpy(name, netdev->name, IFNAMSIZ);
+		strlcpy(name, netdev->name, IFNAMSIZ);
 
 		unregister_netdev(netdev);
 
-- 
2.20.1