[Bug 1640152] [NEW] Unable to unpack initrd.img-4.4.0-36-generic

[V. K.]

Public bug reported:

I'm filing a bug report against initramfs-tools because I don't know
which package is better. The initrd file produced by "update-initramfs"
cannot be unpacked with cpio:

$ file /boot/initrd.img-4.4.0-36-generic
/boot/initrd.img-4.4.0-36-generic: ASCII cpio archive (SVR4 with no CRC)

$ stat /boot/initrd.img-4.4.0-36-generic | grep Size
  Size: 45048327 Blocks: 87988 IO Block: 1024 regular file

$ cpio -id < /boot/initrd.img-4.4.0-36-generic
44 blocks

$ tree ./
./
└── kernel
    └── x86
        └── microcode
            └── GenuineIntel.bin

$ du -sh kernel/
36K	kernel/

On another machine, the initrd (same version) is a gzip'ed archive (this
one isn't) and unpacks just fine. On this machine, with this initrd, I
also have a problem as explained in bug 1638983, so it could be related.
Decided to file another bug for initrd.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: initramfs-tools 0.122ubuntu8.5
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Nov  8 13:13:15 2016
InstallationDate: Installed on 2016-07-23 (108 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: initramfs-tools
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1640152

Title:
  Unable to unpack initrd.img-4.4.0-36-generic

Status in initramfs-tools package in Ubuntu:
  New

Bug description:
  I'm filing a bug report against initramfs-tools because I don't know
  which package is better. The initrd file produced by "update-
  initramfs" cannot be unpacked with cpio:

  $ file /boot/initrd.img-4.4.0-36-generic
  /boot/initrd.img-4.4.0-36-generic: ASCII cpio archive (SVR4 with no CRC)

  $ stat /boot/initrd.img-4.4.0-36-generic | grep Size
    Size: 45048327 Blocks: 87988 IO Block: 1024 regular file

  $ cpio -id < /boot/initrd.img-4.4.0-36-generic
  44 blocks

  $ tree ./
  ./
  └── kernel
      └── x86
          └── microcode
              └── GenuineIntel.bin

  $ du -sh kernel/
  36K	kernel/

  On another machine, the initrd (same version) is a gzip'ed archive
  (this one isn't) and unpacks just fine. On this machine, with this
  initrd, I also have a problem as explained in bug 1638983, so it could
  be related. Decided to file another bug for initrd.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: initramfs-tools 0.122ubuntu8.5
  ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
  Uname: Linux 4.4.0-36-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Nov  8 13:13:15 2016
  InstallationDate: Installed on 2016-07-23 (108 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: initramfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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