From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 2 Sep 2003 11:17:29 -0700
From: "David S. Miller" <davem@redhat.com>
Subject: Re: [Bridge] Re: [more info] Re: [2.4.22] bad interaction between
 e100 and bridge: BUG at dev.c:991!
Message-Id: <20030902111729.1791f2ad.davem@redhat.com>
In-Reply-To: <200309022023.16397.bdschuym@pandora.be>
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To: Bart De Schuymer <bdschuym@pandora.be>
Cc: shemminger@osdl.org, schulz@schwaar.com, scott.feldman@intel.com, jgarzik@pobox.com, bridge@osdl.org

On Tue, 2 Sep 2003 20:23:16 +0200
Bart De Schuymer <bdschuym@pandora.be> wrote:

> A pristine 2.4.22 doesn't have bridge-netfilter.

This is true.

> I don't see how bridge-netfilter would be involved anyway, altering
> a packet doesn't automagically trigger checksum recalculation.

You don't understand the problem.

When a packet gets received, if the hardware checksums the packet
it sets skb->ip_summed.  If you take that SKB and want to transmit
it you have to reinitialize the skb->ip_summed field or else things
explode.