Re: problem with nilfs_cleanerd

[Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org>]

On Wed, 07 Jul 2010 15:02:25 +0900 (JST), Ryusuke Konishi wrote:
> Hi,
> 
> On Tue, 06 Jul 2010 11:02:41 +0200, Łukasz_Wójcicki wrote:
> > I'am using kernel 2.6.20 with nilf_utils-2-0-18 and nilfs kernel module
> > 2-0-20 .
> > 
> > <1>Unable to handle kernel NULL pointer dereference at virtual address
> > 00000000
> > <1>pgd = c4eb0000
> > <1>[00000000] *pgd=c4e2d031, *pte=00000000, *ppte=00000000
> > <4>Internal error: Oops: 17 [#1]
> > <4>Modules linked in:
> > <4>CPU: 0
> > <4>PC is at nilfs_btree_lookup_dirty_buffers+0x10c/0x1ec
> > <4>LR is at 0xc4c99b24
> <snip>
> 
> Could you try the following patch to narrow down the cause?
> 
> There is a function lacking range check in the btree code.  This patch
> will catch the defect if the oops comes from a range error.
> 
> I'm now reviewing the btree code to find out root cause of the range
> error.
> 
> Thanks,
> Ryusuke Konishi

Let me ask you a question.

Are there any warnings or errors earlier in the log?

Ryusuke Konishi