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Subject: Re: 2.6.10-mm1 panic in sysfs ?
From: Badari Pulavarty <pbadari@us.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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	 <20050105165241.481473a3.akpm@osdl.org>
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On Wed, 2005-01-05 at 16:52, Andrew Morton wrote:
> Badari Pulavarty <pbadari@us.ibm.com> wrote:
> >
> > Hi Andrew,
> > 
> > I get a panic in sysfs_readdir() while booting 2.6.10-mm1
> > kernel. Known fixes ?
> > 
> 
> It's news to me.
> 
> > Unable to handle kernel NULL pointer dereference at virtual address 00000020
> >  printing eip:
> > c109c8ef
> > *pde = 0191c001
> > Oops: 0000 [#1]
> > SMP
> > Modules linked in:
> > CPU:    2
> > EIP:    0060:[<c109c8ef>]    Not tainted VLI
> > EFLAGS: 00010282   (2.6.10-mm1kexec)
> 
> What is "2.6.10mm1kexec"?

I enabled kexec in the kernel, so added "kexec" in the EXTRA VERSION.

> 
> > EIP is at sysfs_readdir+0xef/0x280
> > eax: 00000000   ebx: c15e1160   ecx: 0000000c   edx: 00000020
> > esi: c15e1164   edi: c15dd72d   ebp: c1a7df78   esp: c1a7df3c
> > ds: 007b   es: 007b   ss: 0068
> > Process getcfg (pid: 1927, threadinfo=c1a7c000 task=c2ba3040)
> 
> Try to work out what arguments are being passed to `getcfg', then run it by
> hand, under strace, to see what /sysfs file is being accessed when it oopses.

Sure. will do and let you know.

Thanks,
Badari

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