linux-kernel - Re: [PATCH 1/1] fix d_revalidate oopsen on NFS exports

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Message-ID: <24960.1322643283@redhat.com>
Date:	Wed, 30 Nov 2011 08:54:43 +0000
From:	David Howells <dhowells@...hat.com>
To:	Chris Dunlop <chris@...he.net.au>,
	Al Viro <viro@...iv.linux.org.uk>
Cc:	dhowells@...hat.com,
	"Myklebust, Trond" <Trond.Myklebust@...app.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Eric Van Hensbergen <ericvh@...il.com>,
	Ron Minnich <rminnich@...dia.gov>,
	Latchesar Ionkov <lucho@...kov.net>,
	Jan Harkes <jaharkes@...cmu.edu>,
	"maintainer:CODA FILE SYSTEM" <coda@...cmu.edu>,
	Dave Kleikamp <shaggy@...nel.org>,
	Petr Vandrovec <petr@...drovec.name>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	v9fs-developer@...ts.sourceforge.net,
	linux-afs@...ts.infradead.org, codalist@...EMANN.coda.cs.cmu.edu,
	jfs-discussion@...ts.sourceforge.net, linux-nfs@...r.kernel.org
Subject: Re: [PATCH 1/1] fix d_revalidate oopsen on NFS exports

Chris Dunlop <chris@...he.net.au> wrote:

> To avoid other people further wasting their and your time on
> exactly the same thing future, how something like the following
> patch, based on your comment in:
> 
> http://article.gmane.org/gmane.linux.nfs/40370
> 
> ...and, if that's acceptable, is it worthwhile doing for the
> other file systems which are likewise currently vulnerable when
> abused by broken layered file systems?

Also, this may get fixed by Al's atomic open patches - but obviously it hasn't
been yet...

> Don't oops when abused by broken layered file systems
> 
> Signed-off-by: Chris Dunlop <chris@...he.net.au>

Acked-by: David Howells <dhowells@...hat.com>

It's also worth printing a message - this *is* a kernel bug of some description
if it happens.

David
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