On 12/09/2010 01:19 AM, Chuck Lever wrote:
> Hi Stefan-
> 
> On Dec 8, 2010, at 3:35 PM, Chuck Lever wrote:
> 
>> 
>> On Dec 8, 2010, at 2:03 PM, Trond Myklebust wrote:
>> 
>>> On Wed, 2010-12-08 at 18:30 +0000, bugzilla-daemon@bugzilla.kernel.org 
>>> wrote:
>>>> https://bugzilla.kernel.org/show_bug.cgi?id=24302
>>>> 
>>>> 
>>>> Andrew Morton <akpm@linux-foundation.org> changed:
>>>> 
>>>> What    |Removed                     |Added 
>>>> ----------------------------------------------------------------------------
>>>>
>>>> 
Component|Other                       |NFS
>>>> AssignedTo|fs_other@kernel-bugs.osdl.o |trond.myklebust@fys.uio.no |rg
>>>> |
>>>> 
>>>> 
>>>> 
>>>> 
>>>> --- Comment #8 from Andrew Morton <akpm@linux-foundation.org>
>>>> 2010-12-08 18:30:32 --- OK, I reassigned it to NFS.  If that was wrong
>>>> then at least the NFS guys should be able to help point things in the
>>>> right direction.
>>> 
>>> <Switching to email interface. Please do not edit the bugzilla entry 
>>> directly, since that will lose the above Cc information>

Missed to read the above, so I have to duplicate things a bit, sorry. Removed
the bugzilla cc, so the report does not get spammed.

>>> 
>>> 
>>> Chuck,
>>> 
>>> Stefan appears to be hitting a panic in the nfs_umount() call from 
>>> nfs_walk_authlist(). Can you take a look, please?
>> 
>> Recv'd.  I'll have a look.
> 
> Apologies in advance for the attachment.  There are a few other clean ups
> that can be done, but this seems to be the minimal fix.  Please try this and
> let us know if it addresses your panic.
> 
> 
> 
> 
> 
> 
> The faulty commit went in a while back, so this patch is probably appropriate
> for stable kernels (back to 2.6.31, where this was likely introduced).
> 

I can confirm that this was the root cause of the crash. The sha referenced as
the causing commit, got in with a 2.6.32-rc so I added the stable info
accordingly. I also added my tested-by and slightly modified the bug reference
format (Chuck, I hope this is ok).

-Stefan