diff mbox series

drivers/net/usb: Remove all strcpy() uses

Message ID 20210801171226.17917-1-len.baker@gmx.com (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series drivers/net/usb: Remove all strcpy() uses | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Guessed tree name to be net-next
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 32 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link

Commit Message

Len Baker Aug. 1, 2021, 5:12 p.m. UTC
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().

Signed-off-by: Len Baker <len.baker@gmx.com>
---
This is a task of the KSPP [1]

[1] https://github.com/KSPP/linux/issues/88

 drivers/net/usb/ipheth.c | 2 +-
 drivers/net/usb/usbnet.c | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

--
2.25.1
diff mbox series

Patch

diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c
index 207e59e74935..06e2181e5810 100644
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -443,7 +443,7 @@  static int ipheth_probe(struct usb_interface *intf,

 	netdev->netdev_ops = &ipheth_netdev_ops;
 	netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
-	strcpy(netdev->name, "eth%d");
+	strscpy(netdev->name, "eth%d", sizeof(netdev->name));

 	dev = netdev_priv(netdev);
 	dev->udev = udev;
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 470e1c1e6353..840c1c2ab16a 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1725,7 +1725,7 @@  usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
 	dev->interrupt_count = 0;

 	dev->net = net;
-	strcpy (net->name, "usb%d");
+	strscpy(net->name, "usb%d", sizeof(net->name));
 	memcpy (net->dev_addr, node_id, sizeof node_id);

 	/* rx and tx sides can use different message sizes;
@@ -1752,13 +1752,13 @@  usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
 		if ((dev->driver_info->flags & FLAG_ETHER) != 0 &&
 		    ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 ||
 		     (net->dev_addr [0] & 0x02) == 0))
-			strcpy (net->name, "eth%d");
+			strscpy(net->name, "eth%d", sizeof(net->name));
 		/* WLAN devices should always be named "wlan%d" */
 		if ((dev->driver_info->flags & FLAG_WLAN) != 0)
-			strcpy(net->name, "wlan%d");
+			strscpy(net->name, "wlan%d", sizeof(net->name));
 		/* WWAN devices should always be named "wwan%d" */
 		if ((dev->driver_info->flags & FLAG_WWAN) != 0)
-			strcpy(net->name, "wwan%d");
+			strscpy(net->name, "wwan%d", sizeof(net->name));

 		/* devices that cannot do ARP */
 		if ((dev->driver_info->flags & FLAG_NOARP) != 0)