From: Herbert Poetzl <herbert@13thfloor.at>
To: Emmanuel Fleury <fleury@cs.auc.dk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Unable to handle kernel...
Date: Tue, 21 Oct 2003 13:11:12 +0200 [thread overview]
Message-ID: <20031021111112.GC4663@DUK2.13thfloor.at> (raw)
In-Reply-To: <1065623368.15369.35.camel@rade7.s.cs.auc.dk>
On Wed, Oct 08, 2003 at 04:29:28PM +0200, Emmanuel Fleury wrote:
> Hi,
>
> I am pretty new in coding for the kernel and I was wandering what is the
> _deep_ meaning of:
>
> "Unable to handle kernel paging request at virtual address XXXX"
some page was requested, (probably via a pointer
dereference, read or write), which led to a page
fault, which in turn could not be satisfied by
loading/providing the requested page, because it
simply isn't there (usually wrong address)
> and
> "Unable to handle kernel NULL pointer dereference".
some pointer (value = NULL) was dereferenced, which
should be considered an error, this caused the oops
which (probably) follows those lines (reg/stackdump)
int *test = NULL;
int v = test[0]; // bad!
> If somebody could explain this to me, I would be very pleased ! :)
probably there are better explanations,
HTH,
Herbert
> PS: I know already how to trace an Oops by using ksymoops. But these two
> errors are puzzling me and I would like to understand more about it.
>
> Regards
> --
> Emmanuel
>
> The tradition of open science has done more to build the modern
> economy than Microsoft ever will.
> -- Linus Torvalds
>
> -
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next prev parent reply other threads:[~2003-10-21 11:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-08 14:29 Emmanuel Fleury
2003-10-21 11:11 ` Herbert Poetzl [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-07-17 10:28 Giro
2002-06-12 10:11 unable " Maciej Polewczynski
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