From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vlad Yasevich Subject: Re: [PATCH] macvlan: Fix checksum errors when ip_summed is CHECKSUM_PARTIAL Date: Mon, 19 May 2014 17:24:09 -0400 Message-ID: <537A7679.5040102@gmail.com> References: <1400520254-5142-1-git-send-email-spang@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org To: Michael Spang , Patrick McHardy Return-path: In-Reply-To: <1400520254-5142-1-git-send-email-spang@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 05/19/2014 01:24 PM, Michael Spang wrote: > Changing ip_summed from CHECKSUM_PARTIAL to CHECKSUM_UNNECESSARY > will result in an incorrect checksum if the packet is sent off the box. > > Cc: stable@vger.kernel.org > Signed-off-by: Michael Spang > --- > drivers/net/macvlan.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c > index 753a8c2..806b56a 100644 > --- a/drivers/net/macvlan.c > +++ b/drivers/net/macvlan.c > @@ -267,7 +267,9 @@ static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) > > if (vlan->mode == MACVLAN_MODE_BRIDGE) { > const struct ethhdr *eth = (void *)skb->data; > - skb->ip_summed = CHECKSUM_UNNECESSARY; > + > + if (skb->ip_summed == CHECKSUM_NONE) > + skb->ip_summed = CHECKSUM_UNNECESSARY; > > /* send to other bridge ports directly */ > if (is_multicast_ether_addr(eth->h_dest)) { > Already done. See commit f114890cdf84d753f6b41cd0cc44ba51d16313da -vlad