From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH] Add missing skb->dev assignment in Frame Relay RX code Date: Sun, 29 Jun 2008 13:04:20 -0700 Message-ID: <20080629130420.62d00d59@extreme> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Jeff Garzik , Andrew Morton , , lkml To: Krzysztof Halasa Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Sun, 29 Jun 2008 21:48:11 +0200 Krzysztof Halasa wrote: > Hi, > > Commit 4c13eb6657fe9ef7b4dc8f1a405c902e9e5234e0 ([ETH]: Make > eth_type_trans set skb->dev like the other *_type_trans) removed > skb->dev assignment from hdlc_fr.c:fr_rx(). Unfortunately it was also > needed for cases other than eth_type_trans(). > > Adding it back. > > It's quite serious and may be a security risk as it causes a wrong > input interface indication (the physical hdlcX instead of logical > pvcX). Probably -stable class fix. > > Signed-off-by: Krzysztof Halasa > > diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c > index c4ab032..3a86e64 100644 > --- a/drivers/net/wan/hdlc_fr.c > +++ b/drivers/net/wan/hdlc_fr.c > @@ -1008,6 +1008,7 @@ static int fr_rx(struct sk_buff *skb) > stats->rx_bytes += skb->len; > if (pvc->state.becn) > stats->rx_compressed++; > + skb->dev = dev; > netif_rx(skb); > return NET_RX_SUCCESS; > } else { > -- > 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 Better to use netdev_alloc_skb for receive buffers instead. --- a/drivers/net/wan/hdlc_fr.c 2008-06-29 13:02:42.000000000 -0700 +++ b/drivers/net/wan/hdlc_fr.c 2008-06-29 13:04:01.000000000 -0700 @@ -515,7 +515,7 @@ static void fr_lmi_send(struct net_devic } } - skb = dev_alloc_skb(len); + skb = netdev_alloc_skb(dev, len); if (!skb) { printk(KERN_WARNING "%s: Memory squeeze on fr_lmi_send()\n", dev->name);