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Re: skb_checksum_help

To: "David S. Miller" <davem@xxxxxxxxxxxxx>
Subject: Re: skb_checksum_help
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 24 Jan 2005 15:56:35 +1100
Cc: tgraf@xxxxxxx, kaber@xxxxxxxxx, david@xxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20050123202715.281ac87c.davem@xxxxxxxxxxxxx>
References: <20050124005348.GL23931@xxxxxxxxxxxxxx> <E1Cst4o-0007bD-00@xxxxxxxxxxxxxxxxxxxxxxxx> <20050123202715.281ac87c.davem@xxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
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On Sun, Jan 23, 2005 at 08:27:15PM -0800, David S. Miller wrote:
> My current guess is that this is some successful exploit
> of some as-yet-unknown issue in netfilter's fragmentation
> handling.  But that's just a guess.  If some code underruns
> skb->data somehow while unfragging/refragging, that's a sure
> fire way to corrupt things such as the skb->ip_summed field.

Another possibility is some bogus netfilter module that the
reporter is using.  His backtrace was showing an ipq_kill which
isn't in the main tree.
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