netdev - Re: [PATCH][ROSE][AX25] af_ax25: possible circular locking

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Message-Id: <20071230.210057.139323937.davem@davemloft.net>
Date:	Sun, 30 Dec 2007 21:00:57 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	f6bvp@...e.fr, ralf@...ux-mips.org, adobriyan@...il.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH][ROSE][AX25] af_ax25: possible circular locking

From: Jarek Poplawski <jarkao2@...il.com>
Date: Sun, 30 Dec 2007 15:13:23 +0100

> On Sat, Dec 29, 2007 at 07:14:43PM -0800, David Miller wrote:
> ...
> "again" loop should skip this entry next time: s->ax25_dev should
> be NULL, so not equal to ax25dev. (But of course there could be
> this unknown to me place, which changes this back in the meantime.)

Indeed you are right.

> > You'll thus need to resolve this locking conflict more properly.
> > I know it's hard, but your current fix is worse because it adds
> > a new known bug.
> 
> Sorry, it seems this will've to wait until Ralf finds some time,
> because I really can't give this more time, considering I never
> used nor have any plans to use this code, and this bug could
> suggest there is not so many interested in this, besides Bernard,
> either.

I'll try to look at this.
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