** Description changed: [Impact] If a dkms package is installed which has REMAKE_INITRD or the same setting has be manually configured by a user then when a kernel is removed its possible for an ".old-dkms" file to be left in /boot with no associated kernel. bug 1515513 dealt with removing initrd.img-<version>.old-dkms files using the kernel's prerm hook, but that is only executed for the kernel version being removed: any other old-dkms file generated prior to that would not be removed by the hook, taking space in the /boot directory. Note: Filling up the /boot partition causes updates to fail. - [Test Case] As the fix for bug 1515513 is available on Xenial it is no longer possible to reproduce this by simply installing and updating kernels (dkms 2.2.0.3-2ubuntu11.3 would be required for that). In order to replicate it an old dkms file will be created by hand. This assumes a new Xenial schroot. 1) create a file to work as a placeholder for the initrd.img old dkms file sudo touch /boot/initrd.img-4.0.0-0-generic.old-dkms 2) install 3 old kernels, r8168-dkms, and the current initramfs-tools sudo apt-get install -y linux-image-4.4.0-21-generic linux-image-4.4.0-22-generic linux-image-4.4.0-24-generic r8168-dkms initramfs-tools=0.122ubuntu8.12 3) install the headers for the old kernels (forces dkms to run) sudo apt-get install -y linux-headers-4.4.0-21-generic linux-headers-4.4.0-22-generic linux-headers-4.4.0-24-generic - 4) verify that there are 4 old-dkms + 4) verify that there are 4 old-dkms, the manually created and one for each installed kernel ls /boot/*.old-dkms - 5) install the proposed initramfs-tools with this fix + 5) install the initramfs-tools that contains this fix sudo apt-get install -y initramfs-tools - 6) verify that the manually created old-dkms file was removed (only 3 files now) + 6) verify that the manually created old-dkms file was removed and that there are only 3 files now, one for each installed kernel ls /boot/*.old-dkms 7) autoremove the older kernel sudo apt-get autoremove -y - 8) verify that there are now only 2 old-dkms + 8) verify that there are now only 2 old-dkms, one for each installed kernel ls /boot/*.old-dkms - [Regression Potential] Somebody out there might expect the .old-dkms file to be kept, but that seems like an odd expectation. One notices *.old-dkms files being left behind still sitting on the disk after purging the related kernel. This can cause /boot to become full, and when it gets really bad, even sudo apt-get autoremove won't fix the problem - only deleting the old-dkms files manually solves the problem.
** Tags added: xenial ** Tags added: patch ** Patch added: "initramfs-tools_0.122ubuntu8.12_debdiff_0.122ubuntu8.13.patch" https://bugs.launchpad.net/ubuntu/+source/dkms/+bug/1791959/+attachment/5187601/+files/initramfs-tools_0.122ubuntu8.12_debdiff_0.122ubuntu8.13.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791959 Title: remove /boot/initrd.img-*.old-dkms files left behind To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dkms/+bug/1791959/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
