| Message ID | 1442842450-29769-28-git-send-email-a.hajda@samsung.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Andrzej Hajda <a.hajda@samsung.com> Date: Mon, 21 Sep 2015 15:33:59 +0200 > skb->len is always non-negative. > > The problem has been detected using proposed semantic patch > scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1]. > > [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576 > > Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index a39518f..e0556dc 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2522,11 +2522,6 @@ static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb) skb_pull(skb, align_count); } - if (unlikely(skb->len < 0)) { - netdev_warn(dev->net, "invalid rx length<0 %d", skb->len); - return 0; - } - return 1; } diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index d9e7892..30033db 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -2185,11 +2185,6 @@ static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) skb_pull(skb, align_count); } - if (unlikely(skb->len < 0)) { - netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len); - return 0; - } - return 1; } diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 26423ad..66b3ab9 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1815,11 +1815,6 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) skb_pull(skb, align_count); } - if (unlikely(skb->len < 0)) { - netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len); - return 0; - } - return 1; }
skb->len is always non-negative. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> --- drivers/net/usb/lan78xx.c | 5 ----- drivers/net/usb/smsc75xx.c | 5 ----- drivers/net/usb/smsc95xx.c | 5 ----- 3 files changed, 15 deletions(-)