linux-kernel - Re: kernel 2.6.39 (user mode linux) crashes (2.6.38 works fine)

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Message-ID: <BANLkTik0oz6ppJvRpufaaiBL1pqcAxNHuA@mail.gmail.com>
Date:	Fri, 20 May 2011 09:56:02 +0200
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Toralf Förster <toralf.foerster@....de>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: kernel 2.6.39 (user mode linux) crashes (2.6.38 works fine)

2011/5/20 Toralf Förster <toralf.foerster@....de>:
> ...
> Kernel panic - not syncing: Kernel mode fault at addr 0x0, ip 0x80a9f6b

Looks like a NULL-pointer bug.
What code is at address 80a9f6b?
Use "objdump -d -S | less" to find it.
Please note, kernel binary and log message have to match!

> The file /var/log/messages of the UML says :
>
> 2011-05-20T09:33:03.455+02:00 n22_uml kernel: ------------[ cut here ]------------
> 2011-05-20T09:33:03.455+02:00 n22_uml kernel: WARNING: at kernel/futex.c:789 wake_futex+0x28/0x60()

Is this really 2.6.39?
Line 789 contains no WARN*().
http://lxr.linux.no/#linux+v2.6.39/kernel/futex.c#L789

-- 
Thanks,
//richard
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