linux-kernel - Re: [PATCH 1/2] Fix NULL pointer dereference while loading initramfs

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Message-ID: <alpine.LFD.2.03.1309250016290.5312@erqung.pbz>
Date:	Wed, 25 Sep 2013 00:31:51 +0530 (IST)
From:	P J P <ppandit@...hat.com>
To:	Rob Landley <rob@...dley.net>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Fix NULL pointer dereference while loading
 initramfs

  Hello Rob,

+-- On Mon, 23 Sep 2013, Rob Landley wrote --+
| I've been building kernels, including with initramfs, and I don't have
| dracut(8) installed? In today's git:

  dracut(8) is a separate tool installed from package dracut.

 -> dracut-029-2.fc19.x86_64
 -> https://dracut.wiki.kernel.org/

| I've been messing with this area and maight be interested if I had any idea 
| what this guy was talking about?

  Kernel menuconfig selects gzip(1) as a default compression format for the 
initial ramdisk image.

  $ make menuconfig
   -> General setup
    -> Support initial ramdisk compressed using ...

If instead of gzip(1), you select bzip2(1) or xz(1) format and build a new 
kernel, the initramfs image would still be compressed with gzip(1), because 
currently there is no way to pass the selected compression format to dracut(8) 
via $ make install.

# file /boot/initramfs-3.11.0.img 
/boot/initramfs-3.11.0.img: LZMA compressed data, streamed

It shows LZMA because I've patched /sbin/new-kernel-pkg to use 
$INITRD_COMPRESS variable.

Thank you.
--
Prasad J Pandit / Red Hat Security Response Team
DB7A 84C5 D3F9 7CD1 B5EB  C939 D048 7860 3655 602B
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