Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: initramfs-tools (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1884079
Title:
unmkinitramfs in initramfs-tools-core doesn't fully extract an initrd
in bionic
Status in initramfs-tools package in Ubuntu:
Confirmed
Bug description:
I am running Ubuntu 18.04.4
I am looking at the initrd found in the desktop live cd (<cd loop
mount>/casper/initrd). If you execute `binwalk initrd`, binwalk
informs that the initrd file contains 2 cpio archives and a lzma
archive
The first cpio archive is supposed to contain
kernel/x86/microcode/AuthenticAMD.bin
The second cpio archive is supposed to contain
kernel/x86/microcode/GenuineIntel.bin
The third file is a LZMA compressed data
Now, if you execute `unmkinitramfs <cd loop mount>/casper/initrd new-
directory` , you will see 2 directories, "early" and "main".
"early" has the AuthenticAMD.bin, which means it corresponds to the first
cpio.
"main" is the actual initial ram disk file system, which comes from the LZMA
compressed data.
What I expect to see is also the GenuineIntel.bin firmware. `binwalk`
says it's there, but `unmkinitramfs` is not able to extract it out.
Why?
I see binwalk is at version 2.1.1-16, while initramfs-tools-core
(which provides unmkinitramfs) is at version 0.130ubuntu3.9.
How do I extract the ubuntu 18 initramfs and get all the contents that
binwalk is able to see?
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