Re: [Bug 24302] Kernel crashes when repeatedly trying to mount nfs share that is failing

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On Dec 9, 2010, at 5:12 AM, Stefan Bader wrote:

> 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@xxxxxxxxxxxxxxxxxxx 
>>>> wrote:
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=24302
>>>>> 
>>>>> 
>>>>> Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> changed:
>>>>> 
>>>>> What    |Removed                     |Added 
>>>>> ----------------------------------------------------------------------------
>>>>> 
>>>>> 
> Component|Other                       |NFS
>>>>> AssignedTo|fs_other@xxxxxxxxxxxxxxxxxx |trond.myklebust@xxxxxxxxxx |rg
>>>>> |
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> --- Comment #8 from Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
>>>>> 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).

Looks good to me.  I assume, since Trond still owns the kernel.org bugzilla, that he will close this loop?  Let me know if I need to do anything else.

-- 
Chuck Lever
chuck[dot]lever[at]oracle[dot]com




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