From: Neil Brown <neilb@cse.unsw.edu.au>
To: <Nikolaos.Michalakis@nokia.com>
Cc: <nfs@lists.sourceforge.net>
Subject: Re: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Date: Thu, 3 Jul 2003 11:36:23 +1000 [thread overview]
Message-ID: <16131.34967.583276.739735@gargle.gargle.HOWL> (raw)
In-Reply-To: message from Nikolaos.Michalakis@nokia.com on Wednesday July 2
On Wednesday July 2, Nikolaos.Michalakis@nokia.com wrote:
> Hi,
>
> I got the latest nfs-utils from the sourceforge website and I am trying to get a working nfs-kernel-server on an ARM processor running intimate linux (Debian clone). I compiled the source code, installed the binaries, setup
> /etc/exports but when I try to access the server the kernel oops.
>
> Here is the scenario:
> 1. I can mount the exported directory successfully.
> 2. When I try to 'ls' the contents of the directory I get on the client:
> ls: <filename1>: Input/Output error
> ls: <filename2>: Input/Output error
> ...
> ls: <filenameN>: Input/Output error
> (the filenames are the exact ones on the server)
Very odd...
> Backtrace:
> Function entered at [<c002442c>] from [<c001ba48>]
> Function entered at [<c001ba00>] from [<c001bccc>]
> r8 = C037CA00 r7 = C24CC204 r6 = C1A81000 r5 = C24CC214
> r4 = C037CCB4
> Function entered at [<c4a8e7a4>] from [<c4a8ee04>]
> Function entered at [<c4a8eb7c>] from [<c4a96bb8>]
> Function entered at [<c4a96af4>] from [<c4a8c6ac>]
> Function entered at [<c4a8c5d0>] from [<c4a72ed8>]
> r8 = C4A9EB94 r7 = 00000001 r6 = C25FC014 r5 = C24F0E00
> r4 = C24F0F38
> Function entered at [<c4a72bc0>] from [<c4a8c408>]
> Function entered at [<c4a8c1c4>] from [<c001ac5c>]
> Code: e5903004 e5802004 e5810008 e5823004 (e5832000)
>
You need to some how convert these addresses, inside "[<..>]" to
syumbolic addresses in the kernel.
You can do it with gdb:
gdb vmlinux
disassemble 0xc002442c
but that can be a bit laborious. There is a program called "ksymoops"
which does it for you, if you can find an 'arm' version.
NeilBrown
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next prev parent reply other threads:[~2003-07-03 1:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-02 16:40 Unable to handle kernel NULL pointer dereference at virtual address 00000000 Nikolaos.Michalakis
2003-07-03 1:36 ` Neil Brown [this message]
2004-12-15 1:32 Ray Van Dolson
2004-12-15 16:29 ` Matt Domsch
2004-12-15 16:36 ` Ray Van Dolson
2004-12-17 16:11 ` Ray Van Dolson
2005-01-03 17:22 ` Ray Van Dolson
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