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From: Michael Tokarev <mjt@tls.msk.ru>
To: dsaxena@plexity.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: Modprobe as script breaks initramfs kernel?
Date: Thu, 22 Feb 2007 14:30:53 +0300	[thread overview]
Message-ID: <45DD7EED.7030107@tls.msk.ru> (raw)
In-Reply-To: <20070222003309.GA22471@plexity.net>

Deepak Saxena wrote:
> We attempted an experiment in cleaning up some modprobe messages during 
> initramfs bootup when the modules directory is missing by moving modprobe 
> to modprobe-bin and replacing modprobe with the following simple shell script:
> 
> #!/bin/sh
> # Clean up bootup when modules are not present
> 
> if [ -e "/lib/modules/'uname -r'/modules.dep" ] ; then
> 	/sbin/modprobe-bin $*
> else
> 	exit 0
> fi
> 
[]
> BUG: unable to handle kernel NULL pointer dereference at virtual address 00000014
[]
> Trace; c0107737 <sys_pipe+17/60>
> Trace; c01030d7 <syscall_call+7/b>

This is the same issue I reported much earlier with /sbin/hotplug being a script
in initrfamfs.  The problem is because pipefs isn't initialized yet at the time
the script gets called, and causes a NULL-pointer deref.  Obviously you're using
pipe above.

/mjt

  reply	other threads:[~2007-02-22 11:31 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-22  0:33 Deepak Saxena
2007-02-22 11:30 ` Michael Tokarev [this message]
2007-02-22 18:44   ` Jan Engelhardt
2007-02-22 20:52     ` Michael Tokarev
2007-02-23  3:44     ` Deepak Saxena

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