Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754759Ab2H3CjQ (ORCPT ); Wed, 29 Aug 2012 22:39:16 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:40604 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754716Ab2H3CjN (ORCPT ); Wed, 29 Aug 2012 22:39:13 -0400 X-Sasl-enc: onDBgyaIRD8OAzHQZ7bcxR7EIT8ZDL8glscmKv7ul9yw 1346294353 From: Alan Ott To: Alexander Smirnov , Dmitry Eremin-Solenikov , "David S. Miller" , Tony Cheneau Cc: linux-zigbee-devel@lists.sourceforge.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Ott Subject: [PATCH v2 1/2] 6lowpan: Make a copy of skb's delivered to 6lowpan Date: Wed, 29 Aug 2012 22:39:00 -0400 Message-Id: <1346294341-26808-2-git-send-email-alan@signal11.us> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1346294341-26808-1-git-send-email-alan@signal11.us> References: <1346294341-26808-1-git-send-email-alan@signal11.us> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1482 Lines: 44 Since lowpan_process_data() modifies the skb (by calling skb_pull()), we need our own copy so that it doesn't affect the data received by other protcols (in this case, af_ieee802154). Signed-off-by: Alan Ott --- net/ieee802154/6lowpan.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c index 6a09522..ce33b02 100644 --- a/net/ieee802154/6lowpan.c +++ b/net/ieee802154/6lowpan.c @@ -1133,6 +1133,8 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[]) static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { + struct sk_buff *local_skb; + if (!netif_running(dev)) goto drop; @@ -1144,7 +1146,12 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev, case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */ case LOWPAN_DISPATCH_FRAG1: /* first fragment header */ case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */ - lowpan_process_data(skb); + local_skb = skb_copy(skb, GFP_ATOMIC); + if (!local_skb) + goto drop; + lowpan_process_data(local_skb); + + kfree_skb(skb); break; default: break; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/