linux-kernel - Re: kernel BUG at net/core/skbuff.c in linux-2.6.21-rc6

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Date:	Thu, 19 Apr 2007 07:35:47 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	paulus@...ba.org (Paul Mackerras)
Cc:	davem@...emloft.net, kaber@...sh.net, poemann@...il.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: kernel BUG at net/core/skbuff.c in linux-2.6.21-rc6

Hi Paul:

Paul Mackerras <paulus@...ba.org> wrote:
> 
> So this doesn't change process_input_packet(), which treats the case
> where the first byte is 0xff (PPP_ALLSTATIONS) but the second byte is
> 0x03 (PPP_UI) as indicating a packet with a PPP protocol number of
> 0xff.  Arguably that's wrong since PPP protocol 0xff is reserved, and
> the RFC does envision the possibility of receiving frames where the
> control field has values other than 0x03.

Your fix is probably needed too.  However, I think the issue that Patrick
was trying to fix is the case where p[0] != PPP_ALLSTATIONS and therefore
we'd still have a problem there.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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