linux-kernel - Re: BUG: kernel crash report, odd...

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Message-ID: <Pine.LNX.4.64.0707101650390.4603@blonde.wat.veritas.com>
Date:	Tue, 10 Jul 2007 17:07:35 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Charles Shannon Hendrix <shannon@...omaker.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: BUG: kernel crash report, odd...

On Mon, 9 Jul 2007, Charles Shannon Hendrix wrote:
> 
> A system I was using a few minutes ago dumped this to the syslog:
> 
> Jul  9 17:50:38 daydream kernel: [76022.613000] BUG: unable to handle
> kernel NULL pointer dereference at virtual address 00000010
> Jul  9 17:50:38 daydream kernel: [76022.613000]  printing eip:
> Jul  9 17:50:38 daydream kernel: [76022.613000] c01ace66
> Jul  9 17:50:38 daydream kernel: [76022.613000] *pde = 00000000
> Jul  9 17:50:38 daydream kernel: [76022.613000] Oops: 0000 [#1]
> 
> There was no other information either before or after.

Something simple you can do, which I didn't see mentioned yet:
look up the entries before and after c01ace66 in that 2.6.20
kernel's System.map, then post the output of
objdump -d --start-address=0xbefore --stop-address=0xafter vmlinux
so people here can see the function name and the oopsing instruction
in its context.  May not help at all, but well worth trying.

Hugh
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