From 71749531f2d1954137a1a77422ef4ff29eb102dd Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 9 Jul 2007 15:33:40 -0700 Subject: [PATCH] sky2: check drop truncated packets If packet larger than MTU is received, the driver uses hardware to truncate the packet. Use the status registers to catch/drop them. Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 99a999383e9b..4e0b839de7e4 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -2109,6 +2109,9 @@ static struct sk_buff *sky2_receive(struct net_device *dev, if (!(status & GMR_FS_RX_OK)) goto resubmit; + if (status >> 16 != length) + goto len_mismatch; + if (length < copybreak) skb = receive_copy(sky2, re, length); else @@ -2118,6 +2121,11 @@ resubmit: return skb; +len_mismatch: + /* Truncation of overlength packets + causes PHY length to not match MAC length */ + ++sky2->net_stats.rx_length_errors; + error: ++sky2->net_stats.rx_errors; if (status & GMR_FS_RX_FF_OV) { -- 2.20.1