[Bug 2085157] Re: mkinitramfs fails with copy_file binary '/libgcc_s.so.[1-9]' not found

[Frank Heimes]

Hi Benjamin,
well I thought about simplifying copy_libgcc too.
But it already has the signature for libdir/library and I didn't wanted to remove it,
and according to the SRU process I think that changing just the way it is called is less impact-full than modifying the function itself (body and signature).
On top this modification would be under debian/* (debian/initramfs/hooks/multipath) rather than in the upstream code (/usr/share/initramfs-tools/hook-functions).
And there are further cases under /usr/share/initramfs-tools/* where paths are constructed similarly (and I think it's not too complicated ;-) ).
And since copy_libgcc is in /usr/share/initramfs-tools/hook-functions of initramfs-tools-core hence potentially widely used, I wanted to be esp. careful about any modification, since it might "somehow somewhere" be used in a way I'm not aware of and that I cannot oversee right now.

Thought about opening a Debian bug on that as well, since the situation
is the same (at least in trixie  and sid).

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Title:
  mkinitramfs fails with copy_file binary '/libgcc_s.so.[1-9]' not found

Status in initramfs-tools package in Ubuntu:
  New
Status in multipath-tools package in Ubuntu:
  New

Bug description:
  I recently did an 24.10 install and was surprised that the system
  hangs during the post-install reboot.

  Investigation showed that this happens if the installer applies
  updates, which is done by default, if there is proper network
  connectivity and archive access.

  In case of an install where I disabled the network, hence an offline
  install was done, the installation incl. post-install reboot was
  successful.

  So I took such a successfully installed system (where no updates were applied) and noticed that currently the available updates are:
  $ apt list --upgradable
  iproute2/oracular-updates 6.10.0-2ubuntu1 s390x [upgradable from: 6.10.0-2]
  linux-generic/oracular-updates 6.11.0-9.9 s390x [upgradable from: 6.11.0-8.8]
  linux-headers-generic/oracular-updates 6.11.0-9.9 s390x [upgradable from: 6.11.0-8.8]
  linux-image-generic/oracular-updates 6.11.0-9.9 s390x [upgradable from: 6.11.0-8.8]
  linux-libc-dev/oracular-updates 6.11.0-9.9 s390x [upgradable from: 6.11.0-8.8]
  linux-tools-common/oracular-updates 6.11.0-9.9 all [upgradable from: 6.11.0-8.8]

  So seemed to be kernel related, hence tried to update the kernel manually:
  $ sudo apt install linux-image-generic/oracular-updates
  Selected version '6.11.0-9.9' (Ubuntu:24.10/oracular-updates [s390x]) for 'linux-image-generic'
  Upgrading:
    linux-generic          linux-image-generic  linux-tools-common
    linux-headers-generic  linux-libc-dev

  Installing dependencies:
    linux-headers-6.11.0-9          linux-modules-extra-6.11.0-9-generic
    linux-headers-6.11.0-9-generic  linux-tools-6.11.0-9
    linux-image-6.11.0-9-generic    linux-tools-6.11.0-9-generic
    linux-modules-6.11.0-9-generic

  Suggested packages:
    fdutils  linux-tools

  Summary:
    Upgrading: 5, Installing: 7, Removing: 0, Not Upgrading: 1
    Download size: 65.3 MB
    Space needed: 165 MB / 21.2 GB available
    └─ in /boot:  43.1 MB / 1,876 MB available

  Continue? [Y/n] Y
  ...
  Setting up linux-generic (6.11.0-9.9) ...
  Progress: [ 96%] [███████████████████████████████████████████████████████▋  ]
  Progress: [ 96%] [███████████████████████████████████████████████████████▋  ]
  Progress: [ 96%] [███████████████████████████████████████████████████████▋  ]
  update-initramfs: Generating /boot/initrd.img-6.11.0-9-generic
  mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found█████▋  ]
  mkinitramfs: copy_file: binary '/libgcc_s.so.[1-9]' not found
  Using config file '/etc/zipl.conf'
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Building bootmap in '/boot'
  Adding IPL section 'ubuntu' (default)
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Preparing boot device for LD-IPL: dm-0.
  Done.
  /etc/kernel/postinst.d/kdump-tools:
  kdump-tools: Generating /var/lib/kdump/initrd.img-6.11.0-9-generic
  mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found
  mkinitramfs: copy_file: binary '/libgcc_s.so.[1-9]' not found
  /etc/kernel/postinst.d/zz-zipl:
  Using config file '/etc/zipl.conf'
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Building bootmap in '/boot'
  Adding IPL section 'ubuntu' (default)
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Preparing boot device for LD-IPL: dm-0.
  Done.
  Scanning processes...
  Scanning processor microcode...
  Scanning linux images...

  Pending kernel upgrade!
  Running kernel version:
    6.11.0-8-generic
  Diagnostics:
    The currently running kernel version is not the expected kernel version
  6.11.0-9-generic.

  Restarting the system to load the new kernel will not be handled automatically,
  so you should consider rebooting.

  Failed to check for processor microcode upgrades.

  No services need to be restarted.

  No containers need to be restarted.

  No user sessions are running outdated binaries.

  No VM guests are running outdated hypervisor (qemu) binaries on this
  host.

  I noticed these two lines, that have been spit out by update-initramfs:
  update-initramfs: Generating /boot/initrd.img-6.11.0-9-generic
  mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found█████▋  ]
  mkinitramfs: copy_file: binary '/libgcc_s.so.[1-9]' not found

  Hence I tried to ran update-initramfs on the release kernel 6.11.0-8-8
  and it happened there as well:

  $ sudo update-initramfs -k all -u
  update-initramfs: Generating /boot/initrd.img-6.11.0-8-generic
  mkinitramfs: copy_file: binary '/usr/lib/udev/dmsetup_env' not found
  mkinitramfs: copy_file: binary '/libgcc_s.so.[1-9]' not found
  Using config file '/etc/zipl.conf'
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Building bootmap in '/boot'
  Adding IPL section 'ubuntu' (default)
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Run /lib/s390-tools/zipl_helper.device-mapper 252:1
  Preparing boot device for LD-IPL: dm-0.
  Done.

  So it's a initramfs-tools (mkinitramfs) issue rather than a kernel issue,
  somewhere in copy_libgcc() (or before).

  Seems to be a small issue, but is causing a big impact, since it leads
  to a broken default installation.

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