Re: Modprobe as script breaks initramfs kernel?

From: Michael Tokarev
Date: Thu Feb 22 2007 - 06:31:26 EST

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.

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