linux-kernel - Re: 2.6.24-sha1: RIP [<ffffffff802596c8>] iov_iter

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Message-Id: <200802131117.37389.nickpiggin@yahoo.com.au>
Date:	Wed, 13 Feb 2008 11:17:37 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-sha1: RIP  [<ffffffff802596c8>] iov_iter_advance+0x38/0x70

On Wednesday 13 February 2008 09:27, Alexey Dobriyan wrote:
> On Tue, Feb 12, 2008 at 02:04:30PM -0800, Andrew Morton wrote:
> > On Sun, 10 Feb 2008 17:00:31 +0300
> >
> > Alexey Dobriyan <adobriyan@...il.com> wrote:
> > > This happened during LTP. FWIW, modprobe/rmmod trivial empty module
> > > together with cat /proc/*/wchan and cat /proc/modules were also
> > > running.
> > >
> > > Box is E6400, much debugging is on, config below.
> > >
> > >
> > > [ 4057.310000] BUG: unable to handle kernel paging request at
> > > ffff810101dbc008 [ 4057.310000] IP: [<ffffffff802596c8>]
> > > iov_iter_advance+0x38/0x70 [ 4057.310000] PGD 8063 PUD c063 PMD
> > > 153baa163 PTE 8000000101dbc160 [ 4057.310000] Oops: 0000 [1] SMP
> > > DEBUG_PAGEALLOC
> > > [ 4057.310000] CPU 0
> > > [ 4057.310000] Modules linked in: [last unloaded: foo]
> >
> > what is this foo.ko of which you speak, and did it wreck your kernel?
>
> It's a trivial dumb module which does nothing but loads and unloads.
> I redid ftest03 later without any suspicious activity and it oopsed the
> same way.

Ah crap. Hmm, maybe I didn't consider all cases with my last patch to
that code... is there an easy way to get the ftest03 source and run
it?
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