[Bug 1788727] Re: upgrade crashing due to unsigned kernels
Miguel Aveiro
1788727 at bugs.launchpad.net
Tue Nov 13 20:11:15 UTC 2018
Hi. Could someone please help me with updating my Ubuntu? I've received
these errors.
I'm not a software developer and pretty new to Linux so simple
explanations are appreciated.
Thanks.
--
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1788727
Title:
upgrade crashing due to unsigned kernels
Status in grub2 package in Ubuntu:
Fix Released
Status in grub2-signed package in Ubuntu:
Fix Released
Status in grub2 source package in Bionic:
Fix Committed
Status in grub2-signed source package in Bionic:
Fix Committed
Status in grub2 source package in Cosmic:
Fix Released
Status in grub2-signed source package in Cosmic:
Fix Released
Bug description:
[Impact]
All upgrades on UEFI from xenial to bionic.
[Test case]
1) Install Ubuntu 16.04, on an UEFI system with Secure Boot enabled.
2) Upgrade to 18.04; validate that the upgrade is successful and does not fail due to "unsigned kernels" as an error message / debconf prompt.
[Regression Potential]
Things to watch out for are continuing with an upgrade from 16.04 to 18.04 where only unsigned kernels are available, despite the running kernel at upgrade-time being included with a .efi.signed file -- if neither the .efi.signed file is signed nor the vmlinuz for that particular kernel version, the upgrade should fail to avoid letting users upgrade into a non-working system.
---
$ ls /boot/vmlinuz-*
/boot/vmlinuz-4.4.0-130-generic
/boot/vmlinuz-4.4.0-130-generic.efi.signed
/boot/vmlinuz-4.4.0-133-generic
/boot/vmlinuz-4.4.0-133-generic.efi.signed
/boot/vmlinuz-4.4.0-134-generic
/boot/vmlinuz-4.4.0-134-generic.efi.signed
/boot/vmlinuz-4.4.0-135-generic
/boot/vmlinuz-4.4.0-135-generic.efi.signed
$
On dist-upgrade from xenial to bionic, grub bails with the error:
│ Cannot upgrade Secure Boot enforcement policy due to unsigned kernels │
│ │
│ Your system has UEFI Secure Boot enabled in firmware, and the following │
│ kernels present on your system are unsigned: │
│ │
│ 4.4.0-135-generic │
│ 4.4.0-134-generic │
│ 4.4.0-133-generic │
│ │
│ │
│ These kernels cannot be verified under Secure Boot. To ensure your │
│ system remains bootable, GRUB will not be upgraded on your disk until │
│ these kernels are removed or replaced with signed kernels. │
This is a false positive, only the -generic files are unsigned, not
the .efi.signed ones; and only the .efi.signed ones are referenced in
the grub.cfg. So the fact that there are unsigned vmlinuz files in
the directory alongside the signed ones should not block grub from
upgrading.
---
ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64 2.02-2ubuntu8.3
Uname: Linux 4.7.0-040700-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Thu Aug 23 19:33:07 2018
ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-05-30 (85 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.7.0-040700-generic root=UUID=d9d727a6-5798-4fe1-8ac0-fb79b1d05431 ro quiet splash vt.handoff=7
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
dpkg 1.19.0.5ubuntu2
apt 1.6.3ubuntu0.1
SourcePackage: grub2
Title: package grub-efi-amd64 2.02-2ubuntu8.3 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-08-23 (0 days ago)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1788727/+subscriptions
More information about the foundations-bugs
mailing list