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Date: Fri, 02 May 2008 10:55:56 +0200
From: Dominic Fandrey <kamikaze@bsdforen.de>
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To: Bruce Evans <brde@optusnet.com.au>
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Cc: freebsd-bugs@FreeBSD.org, gavin@FreeBSD.org, bug-followup@FreeBSD.org
Subject: Re: kern/122961: write operation on msdosfs file system causes panic
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Bruce Evans wrote:
> On Wed, 23 Apr 2008, Dominic Fandrey wrote:
> 
>> Bruce Evans wrote:
>>> The broken nocluster* can be worked around by upgrading to a version of
>>> mount_msdsosfs(8) that hasn't been broken by using nmount(2).
>>> mount_msdsosfs(8) from RELENG_5 should work.
>>
>> I feel reluctant about downgrading to 5.x mount_msdosfs,
> 
> But it would be an upgrage :-).  Anyway, running mount_msdosfs on one
> disposable file system that might panic should be safe.
> 
>> however I can confirm that cp with large files does _not_ cause a 
>> panic. As far as I understand this confirms your theory.
> 
> Not quite.  I would have expected the problem to affect read() and write()
> too unless the file system is mounted with -nocluster*.

This can be closed.

Your suggestions have been very helpful. It turned out that fusefs-ntfs is 
causing the panic, when I copy files from it.