/etc/kernel/postrm.d/zz-zipl fails when removing an old kernel

[Louis Bouchard]

Running apt-get purge linux-image-extra-4.3.0-2-generic linux-image-4.3.0-2-generic when newer kernel is present results in /etc/kernel/postrm.d/zz-zipl failing with the following error :

Removing linux-image-4.3.0-2-generic (4.3.0-2.11) ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.3.0-2-generic /boot/vmlinuz-4.3.0-2-generic
update-initramfs: Deleting /boot/initrd.img-4.3.0-2-generic
run-parts: executing /etc/kernel/postrm.d/kdump-tools 4.3.0-2-generic /boot/vmlinuz-4.3.0-2-generic
kdump-tools: Removing /var/lib/kdump/initrd.img-4.3.0-2-generic
run-parts: executing /etc/kernel/postrm.d/zz-zipl 4.3.0-2-generic /boot/vmlinuz-4.3.0-2-generic
Using config file '/etc/zipl.conf'
Error: Ramdisk file '/boot/initrd.img' in section 'ubuntu': No such file or directory
run-parts: /etc/kernel/postrm.d/zz-zipl exited with return code 1
Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-4.3.0-2-generic.postrm line 328.
dpkg: error processing package linux-image-4.3.0-2-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-4.3.0-2-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)

When the hooks runs, /boot/vmlinuz and /boot/initrd.img are :

caribou@caribou:~$ file /boot/vmlinuz /boot/initrd.img
/boot/vmlinuz: symbolic link to ./vmlinuz-4.3.0-2-generic
/boot/initrd.img: broken symbolic link to ./initrd.img-4.3.0-2-generic

The broken symlink to initrd.img-4.3.0-2-generic triggers the failure

[Dimitri John Ledkov (xnox)]

please use s390x tag when filing s390x bug reports. ubuntu-bug adds it automatically, I completely missed this bug report, as I am only subscribed to tagged bugs =(

[Dimitri John Ledkov (xnox)]

Without a valid /boot/initrd.img we will not boot today. Are you trying to remove _all_ the kernels? And/or is there a reason why there is no active /boot/initrd.img ?

Note this looks like a very old installation, is /boot/initrd.img a symlink? if not please remove that file, and reinstall any kernel.

[Launchpad Janitor (janitor)]

[Expired for s390-tools (Ubuntu) because there has been no activity for 60 days.]