From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH] reduce netfilte sk_buff enlargement
Date: Thu, 21 Jul 2005 16:52:07 -0700 (PDT)
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From: Marcel Holtmann <marcel@holtmann.org>
Date: Fri, 22 Jul 2005 01:49:51 +0200

> The pkt_type zero is not a valid one. We only use 1-4 and 0xff. So this
> can't be the problem. I assume that the cb is not copied from the driver
> into the core at some point.

All clones and copies of SKBs copy of the ->cb[] for you.
So perhaps something is spamming the ->cb[] between these
two places.