I think the person in comment 12 must be running a newer version of Ubuntu
and/or debconf. On 22.04 with debconf 1.5.79ubuntu1, the line looks like this:
if (system("apt-extracttemplates", @collect) != 0) {
No tempdir setting to be found! Also note that 'readlink -f' will still
output when the last path component doesn't exist, as it doesn't on my
22.04 system.
According to the debconf changelog, the upstream Debian bug 223683 was
fixed in debconf 1.5.81. Ubuntu 24.04 has 1.5.86 but 22.04 and older do
not have this fix.
This is 100% reproducible for me on 22.04 by:
- mounting /tmp noexec
- apt reinstall linux-base (this happened to be a small, recently-updated
package whose preconfigured script fails)
Combining the tempdir used in newer debconf plus the apt.conf setting in
https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/90085/comments/23, I
came up with this workaround (from root shell):
# mkdir /var/cache/debconf/tmp.ci
# echo 'APT::ExtractTemplates::TempDir "/var/cache/debconf/tmp.ci";' >
/etc/apt/apt.conf.d/71debconf-tmpdir
Now 'apt reinstall linux-base' no longer has errors preconfiguring
packages.
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https://bugs.launchpad.net/bugs/2043711
Title:
Open3.pm tries to run code in /tmp when preconfiguring packages
Status in debconf package in Ubuntu:
New
Bug description:
During update of ubuntu-drivers-common:
Can't exec "/tmp/ubuntu-drivers-common.config.55GJ8b": Permission denied at
/usr/lib/x86_64-linux-gnu/perl-base/IPC/Open3.pm line 178, <GEN0> line 1.
open2: exec of /tmp/ubuntu-drivers-common.config.55GJ8b configure
1:0.9.6.2~0.22.04.4 failed: Permission
denied at /usr/share/perl5/Debconf/ConfModule.pm line 59.
Preconfiguring packages ...
Can't exec "/tmp/ubuntu-drivers-common.config.uSPrCH": Permission denied at
/usr/lib/x86_64-linux-gnu/perl-base/IPC/Open3.pm line 178, <GEN0> line 1.
open2: exec of /tmp/ubuntu-drivers-common.config.uSPrCH configure
1:0.9.6.2~0.22.04.4 failed: Permission
denied at /usr/share/perl5/Debconf/ConfModule.pm line 59.
/tmp is mounted with noexec because running code from /tmp has been a
vulnerability vector for several decades, hence reporting this as a
vulnerability in perl-base.
This error did not appear to prevent the update of ubuntu-drivers-
common and "dpkg --verify ubuntu-drivers-common" returns 0.
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$ dpkg -S /usr/lib/x86_64-linux-gnu/perl-base/IPC/Open3.pm
perl-base: /usr/lib/x86_64-linux-gnu/perl-base/IPC/Open3.pm
$ dpkg -l perl-base
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-=================-============-=============================>
ii perl-base 5.34.0-3ubuntu1.2 amd64 minimal Perl system
Looks like a package to me. Nevertheless, using "Did you mean..."
offers "perl".
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: perl-base 5.34.0-3ubuntu1.2
ProcVersionSignature: Ubuntu 6.5.0-1007.7-oem 6.5.3
Uname: Linux 6.5.0-1007-oem x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Nov 16 10:08:48 2023
InstallationDate: Installed on 2016-04-23 (2763 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
ProcEnviron:
TERM=rxvt
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: perl
UpgradeStatus: Upgraded to jammy on 2022-08-19 (453 days ago)
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