Re: 2.6.25-rc6: BUG: unable to handle kernel NULL pointer dereference

[Christian Kujau <lists@nerdbynature.de>]

On Tue, 25 Mar 2008, Andrew Morton wrote:
> Markus reported what looks to be the same thing here:
> http://lkml.org/lkml/2008/3/21/202 and it's already in the regresison list.

Yes, I've found 3 more reports for __d_lookup on kerneloops.org, first 
seen for 2.6.25-rc5-git5.

> I can't think what we did to cause this.  Were you doing anything unusual
> on that machine?

Well, I was reading mail...and suddenly alpine complained that the imap 
server was gone - and indeed "imap" was in the Oops message. But apart 
from that, nothing exotic going on.

>  I see the fuse module was loaded - was it being used?

No, it's loaded, but it was not in use.

> Were any oddball (ie: non-ext3 ;)) filesystems being used?  etc.

There's ext2/3/4, jfs, xfs, reiserfs (not reiser4) - the whole family.
The only oddball coming to mind is zd1211rw with its binary firmware. But 
no SMP, no ACPI, no preempt...

Christian.
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