linux-kernel - [PATCH 3.2 17/87] asix: silence log message from oversize packet

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Date:	Mon, 08 Feb 2016 23:53:51 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "David S. Miller" <davem@...emloft.net>,
	"stephen hemminger" <stephen@...workplumber.org>
Subject: [PATCH 3.2 17/87] asix: silence log message from oversize packet

3.2.77-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: stephen hemminger <stephen@...workplumber.org>

commit b70183db83552cf63cac51406aaf76a2cf5fca73 upstream.

Since it is possible for an external system to send oversize packets
at anytime, it is best for driver not to print a message and spam
the log (potential external DoS).

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=109471

Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.2: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/usb/asix_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/usb/asix.c
+++ b/drivers/net/usb/asix.c
@@ -361,7 +361,7 @@ static int asix_rx_fixup_internal(struct
 		}
 
 		if (rx->size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
-			netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
+			netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 				   rx->size);
 			kfree_skb(rx->ax_skb);
 			return 0;