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From: Arnd Bergmann <arnd.bergmann@de.ibm.com>
To: linuxppc-dev@ozlabs.org
Subject: Re: Unable to handle kernel paging request in show_instructions
Date: Tue, 20 Jun 2006 02:44:49 +0200
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On Tuesday 20 June 2006 02:42, David Wilder wrote:

> But in this case the validation passes even though the address is 
> invalid.   Any ideas how to fix this?  Is there a easy way to validate 
> if a page is valid before accessing it?

The check that kallsyms_lookup does should find this, but it may
be overkill to call that function just to verify an address.

You might also have success calling vmalloc_to_page for a 0xd000...
address to check if that is really mapped.

	Arnd <><