netdev - Re: [PATCH] can-raw: Fix skb_orphan

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Date:	Sun, 01 Aug 2010 01:03:37 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	socketcan@...tkopp.net
Cc:	eric.dumazet@...il.com, patrick.ohly@...el.com,
	netdev@...r.kernel.org, socketcan-core@...ts.berlios.de,
	matthias.fuchs@....eu
Subject: Re: [PATCH] can-raw: Fix skb_orphan_try handling

From: Oliver Hartkopp <socketcan@...tkopp.net>
Date: Fri, 30 Jul 2010 11:44:27 +0200

> Hello Eric, hello Patrick,
> 
> Commit fc6055a5ba31e2c14e36e8939f9bf2b6d586a7f5 (net: Introduce
> skb_orphan_try()) allows an early orphan of the skb and takes care on
> tx timestamping, which needs the sk-reference in the skb on driver level.
> So does the can-raw socket, which has not been taken into account here.
> 
> The patch below adds a 'prevent_sk_orphan' bit in the skb tx shared info,
> which fixes the problem discovered by Matthias Fuchs here:
> 
>       http://marc.info/?t=128030411900003&r=1&w=2

Your patch sets this new value, but I never see it getting tested anywhere.

How does this work?
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