package grub-efi-amd64-signed 1.140+2.04-1ubuntu24 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 2

[michael okane]

This error keeps popping up. Tried:

# sudo apt-get purge grub\*
# sudo apt-get install grub-efi
# sudo apt-get autoremove
# sudo update-grub

But after a few minutes, the error returns

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: grub-efi-amd64-signed 1.140+2.04-1ubuntu24
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu25
AptOrdering:
 soundconverter:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Fri Apr 10 12:32:59 2020
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 2
InstallationDate: Installed on 2019-09-27 (196 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-is-python2, 2.7.17-3
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.1ubuntu1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.140+2.04-1ubuntu24 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to focal on 2020-04-03 (7 days ago)

[Seth Arnold (seth-arnold)]

Hello Michael, please note that your logs include a lot of output like this:

[179938.301308] evbug: Event. Dev: input5, Type: 2, Code: 1, Value: 1

evbug can quite easily leak everything you type. I don't think that's what is going on in this case, the values don't seem to be varied enough to describe keypresses, but probably a joystick or something similar.

Whatever this is you probably want to turn it back off again.

Thanks

[Seth Arnold (seth-arnold)]

/var/lib/dpkg/info/grub-efi-amd64-signed.postinst: 23: Syntax error: word unexpected (expecting ")")

Michael, could you attach your /var/lib/dpkg/info/grub-efi-amd64-signed.postinst to this bug report? I'm curious what happened here.

Thanks

[Seth Arnold (seth-arnold)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[Jamie (jbrigman)]

Seth, I was getting the same error on a Mate 20.04 daily build a few days ago. It looks like it was fixed in this patch dealing with the post install: http://launchpadlibrarian.net/473854613/grub2-signed_1.139_1.140.diff.gz

[Seth Arnold (seth-arnold)]

Wonderful, thanks Jamie.

[michael okane (mokane324)]

Dear Seth,
Here is the file.
BR,

On Fri, Apr 10, 2020 at 10:00 PM Seth Arnold <email address hidden>
wrote:

> /var/lib/dpkg/info/grub-efi-amd64-signed.postinst: 23: Syntax error:
> word unexpected (expecting ")")
>
> Michael, could you attach your /var/lib/dpkg/info/grub-efi-
> amd64-signed.postinst to this bug report? I'm curious what happened
> here.
>
> Thanks
>
> ** Information type changed from Private Security to Public
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1872045
>
> Title:
> package grub-efi-amd64-signed 1.140+2.04-1ubuntu24 failed to
> install/upgrade: installed grub-efi-amd64-signed package post-
> installation script subprocess returned error exit status 2
>
> Status in grub2-signed package in Ubuntu:
> New
>
> Bug description:
> This error keeps popping up. Tried:
>
> # sudo apt-get purge grub\*
> # sudo apt-get install grub-efi
> # sudo apt-get autoremove
> # sudo update-grub
>
>
> But after a few minutes, the error returns
>
> ProblemType: Package
> DistroRelease: Ubuntu 20.04
> Package: grub-efi-amd64-signed 1.140+2.04-1ubuntu24
> ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
> Uname: Linux 5.4.0-21-generic x86_64
> ApportVersion: 2.20.11-0ubuntu25
> AptOrdering:
> soundconverter:amd64: Install
> NULL: ConfigurePending
> Architecture: amd64
> Date: Fri Apr 10 12:32:59 2020
> ErrorMessage: installed grub-efi-amd64-signed package post-installation
> script subprocess returned error exit status 2
> InstallationDate: Installed on 2019-09-27 (196 days ago)
> InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
> Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal,
> 3.8.2-0ubuntu2
> PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-is-python2,
> 2.7.17-3
> RelatedPackageVersions:
> dpkg 1.19.7ubuntu3
> apt 2.0.1ubuntu1
> SourcePackage: grub2-signed
> Title: package grub-efi-amd64-signed 1.140+2.04-1ubuntu24 failed to
> install/upgrade: installed grub-efi-amd64-signed package post-installation
> script subprocess returned error exit status 2
> UpgradeStatus: Upgraded to focal on 2020-04-03 (7 days ago)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1872045/+subscriptions
>

[michael okane (mokane324)]

Here is the requested file, grub-efi-amd64-signed.postinst

How can I install the fix?
Update?