linux-kernel - Re: [patch 02/52] fs: fix superblock iteration race

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Date:	Wed, 30 Jun 2010 03:41:22 +1000
From:	Nick Piggin <npiggin@...e.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	John Stultz <johnstul@...ibm.com>,
	Frank Mayhar <fmayhar@...gle.com>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [patch 02/52] fs: fix superblock iteration race

On Tue, Jun 29, 2010 at 10:35:47AM -0700, Linus Torvalds wrote:
> On Tue, Jun 29, 2010 at 7:56 AM, Nick Piggin <npiggin@...e.de> wrote:
> > On Tue, Jun 29, 2010 at 09:02:14AM -0400, Christoph Hellwig wrote:
> >> This should actually be on it's way to Linus for .35, shouldn't it?
> >
> > Yeah, I was waiting for Al to reappear, but I think this is
> > probably the nicest way to solve the problem. Linus?
> 
> I'll apply it. We have a couple of oopses listed for the superblock
> iterator, and I haven't heard from Al. And the patch looks obviously
> fine, whether it's actually the cause of some of the bugs or not.

OK. I only have managed to get it into an infininte loop but I think
it would be surely possible to oops it because the next pointer can
be uninitialised memory at that point.

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