netdev - Re: question on sky2 driver panic

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Message-Id: <20071015.222032.78710839.davem@davemloft.net>
Date:	Mon, 15 Oct 2007 22:20:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	cfriesen@...tel.com
Cc:	shemminger@...ux-foundation.org, netdev@...r.kernel.org
Subject: Re: question on sky2 driver panic

From: "Chris Friesen" <cfriesen@...tel.com>
Date: Mon, 15 Oct 2007 23:16:16 -0600

> Our version of the e1000 passes 200 bytes in the initial chunk, and the 
> rest in fragments.  tipc currently handles that without any difficulty.

There is no requirement for any bytes to be in the initial skb->data
chunk, in fact the Neptune NIU driver only pulls the ethernet header
into there for example.

net/tipc/eth_media.c:recv_msg() seems to dereference buf->data
directly without making any pskb_may_pull() checks, and that is
a bug.

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