update-locale not perform correctly sanity checks

Thanks for your report. Submitted merge request which ought to prevent this from happening.

https://salsa.debian.org/glibc-team/glibc/-/merge_requests/1

It would be nice to merge something, the failure case listed above is pretty nasty.
Please see the launchpad MP, I have a suggestion.

Thanks Dan, I changed the MR in accordance with your suggestion.

Adding a pam task, pam_env does some sanity checking of the input (e.g. %=1 in /etc/default/locale gets ignored) so I don't see why an empty variable name should cause a total failure. But will fix the update-locale script too.

@Michael: I could easily reproduce the issue at the time (a year ago).

Good that it's about to be fixed. As you can see in comment #2 I first turned to Debian, but the response was a bit disappointing. Any chance that you can handle this on the Debian side too?

Fwiw I reported this as a pam bug too https://github.com/linux-pam/linux-pam/issues/395

Hello bs, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.4 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

I verified the test case using locales 2.31-0ubuntu9.4 from focal-proposed.

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.4) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

snapd-glib/1.58-0ubuntu0.20.04.0 (armhf)
apt/2.0.6 (armhf)
libmath-mpfr-perl/4.13-1 (armhf)
art-nextgen-simulation-tools/20160605+dfsg-4 (armhf)
ruby-nokogiri/1.10.7+dfsg1-2build1 (armhf)
r-cran-rgdal/1.4-8-1build2 (armhf)
arrayfire/3.3.2+dfsg1-4ubuntu4 (armhf)
libpango-perl/1.227-3build1 (armhf)
libimage-sane-perl/5-1 (s390x)
ruby-bootsnap/1.4.6-1 (arm64)
mle/1.4.3-1 (ppc64el, arm64)
libsyntax-keyword-try-perl/0.11-1build1 (armhf)
awesome/4.3-4 (armhf)
cysignals/1.10.2+ds-4 (arm64)
gvfs/1.44.1-1ubuntu1 (ppc64el)
libuv1/1.34.2-1ubuntu1.3 (amd64)
bali-phy/3.4.1+dfsg-2build1 (arm64, s390x)
g10k/0.5.7-1 (armhf)
litl/0.1.9-7 (amd64)
ruby-libxml/3.1.0-2 (armhf)
ffmpeg/7:4.2.4-1ubuntu0.1 (armhf)
yorick/2.2.04+dfsg1-10 (ppc64el, s390x)
linux-ibm/5.4.0-1010.11 (amd64)
liborcus/0.15.3-3build2 (armhf)
node-nodedbi/1.0.13+dfsg-1build1 (amd64)
r-bioc-delayedarray/0.12.2+dfsg-1 (armhf)
postgresql-unit/7.2-2 (armhf)
python-freecontact/1.1-5build2 (armhf)
r-cran-rwave/2.4-8-2 (armhf)
libproc-fastspawn-perl/1.2-1build2 (armhf)
linux-hwe-5.11/5.11.0-44.48~20.04.2 (armhf)
foo2zjs/20171202dfsg0-4 (armhf)
r-cran-erm/1.0-0-1 (armhf)
libsys-cpuload-perl/0.03-8build5 (armhf)
libhttp-parser-xs-perl/0.17-1build5 (armhf)
php-luasandbox/3.0.3-2build2 (armhf)
pynfft/1.3.2-3build1 (armhf)
r-cran-processx/3.4.2-1 (ppc64el)
r-bioc-multtest/2.42.0-1 (armhf)
linux-hwe-5.13/5.13.0-23.23~20.04.2 (armhf)
python-blosc/1.7.0+ds1-2ubuntu2 (armhf)
gyoto/1.4.4-3 (armhf)
r-cran-sem/3.1.9-2build1 (armhf)
libtext-reflow-perl/1.17-1build3 (armhf)
python3.9/3.9.5-3ubuntu0~20.04.1 (armhf)
r-cran-samr/3.0-1 (armhf)
r-cran-dplyr/0.8.4-1 (armhf)
python3.8/3.8.10-0ubuntu1~20.04.2 (armhf)
findent/3.1.1-1build1 (armhf)
mercurial/5.3.1-1ubuntu1 (amd64)
libmemcached-libmemcached-perl/1.001801+dfsg-2build4 (armhf)
openbabel/3.0.0+dfsg-3ubuntu3 (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/focal/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Verified:

root@focal:~# dpkg-query -W libc6
libc6:amd64 2.31-0ubuntu9.2
root@focal:~# cp /etc/default/locale /tmp/locale
root@focal:~# update-locale --locale-file /tmp/locale LANGUAGE = en_US.UTF-8
root@focal:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2019-10-21 18:01:06.000000000 +0000
+++ /tmp/locale 2022-01-25 07:54:27.491679519 +0000
@@ -1 +1,2 @@
 LANG=C.UTF-8
+=
root@focal:~# apt install libc6/focal-proposed libc-bin/focal-proposed locales/focal-proposed libc6-dev/focal-proposed libc6-dbg/focal-proposed libc-dev-bin/focal-proposed
[...]
root@focal:~# cp /etc/default/locale /tmp/locale
root@focal:~# update-locale --locale-file /tmp/locale LANGUAGE = en_US.UTF-8
root@focal:~# diff -u /etc/default/locale /tmp/locale
root@focal:~#

Oh heh Gunnar had done that already :) Doubly verified then.

Hello bs, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.5 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.5) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

garli/2.1-3build1 (armhf)
fpc/3.0.4+dfsg-23 (armhf)
lazarus/2.0.6+dfsg-3 (armhf)
libuv1/1.34.2-1ubuntu1.3 (i386)
ikiwiki-hosting/0.20180719-2 (armhf)
rtags/2.37-1 (amd64)
mercurial/5.3.1-1ubuntu1 (amd64, ppc64el)
foo2zjs/20171202dfsg0-4 (armhf)
frameworkintegration/5.68.0-0ubuntu1 (armhf)
hilive/2.0a-3build2 (arm64)
ruby-libxml/3.1.0-2 (s390x)
plasma-framework/5.68.0-0ubuntu1 (armhf)
feersum/1.407-2 (s390x)
r-bioc-delayedarray/0.12.2+dfsg-1 (armhf)
php-luasandbox/3.0.3-2build2 (ppc64el)
snapd-glib/1.58-0ubuntu0.20.04.0 (armhf)
bolt/0.8-4ubuntu1 (ppc64el)
threadweaver/5.68.0-0ubuntu1 (armhf)
python3.8/3.8.10-0ubuntu1~20.04.2 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/focal/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Hello bs, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.8 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.8) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

ruby-stackprof/0.2.15-2 (arm64)
sphinxbase/0.8+5prealpha+1-8 (armhf)
r-cran-ps/1.3.2-2 (s390x)
linux-hwe-5.13/5.13.0-37.42~20.04.1 (armhf)
mercurial/5.3.1-1ubuntu1 (armhf, ppc64el)
linux-hwe-5.11/5.11.0-61.61 (armhf)
mbedtls/2.16.4-1ubuntu2 (s390x)
libreoffice/1:6.4.7-0ubuntu0.20.04.4 (armhf)
ruby-ferret/0.11.8.7-2 (amd64)
cross-toolchain-base/43ubuntu3.1 (ppc64el)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/focal/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Hello bs, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.9 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.9) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

hilive/2.0a-3build2 (arm64)
tomb/2.7+dfsg2-1 (arm64)
linux-hwe-5.13/5.13.0-40.45~20.04.1 (armhf)
bali-phy/3.4.1+dfsg-2build1 (s390x, arm64)
smalt/0.7.6-9 (ppc64el)
mariadb-10.3/1:10.3.34-0ubuntu0.20.04.1 (armhf)
feersum/1.407-2 (s390x)
kopanocore/8.7.0-7ubuntu1 (amd64)
r-cran-ps/1.3.2-2 (s390x, ppc64el)
libreoffice/1:6.4.7-0ubuntu0.20.04.4 (amd64)
imagemagick/8:6.9.10.23+dfsg-2.1ubuntu11.4 (armhf)
ruby-stackprof/0.2.15-2 (amd64)
gnome-photos/3.34.1-1 (ppc64el)
linux-azure-5.11/5.11.0-1029.32~20.04.2 (amd64)
linux-intel-5.13/5.13.0-1010.10 (amd64)
php-luasandbox/3.0.3-2build2 (armhf, arm64)
mbedtls/2.16.4-1ubuntu2 (amd64, ppc64el)
cross-toolchain-base/43ubuntu3.1 (ppc64el)
rtags/2.37-1 (amd64)
gvfs/1.44.1-1ubuntu1 (arm64, ppc64el)
linux-oem-5.14/5.14.0-1033.36 (amd64)
linux-azure-cvm/5.4.0-1076.79+cvm1 (amd64)
mercurial/5.3.1-1ubuntu1 (armhf)
r-cran-satellite/1.0.2-1build1 (armhf)
s3ql/3.3.2+dfsg-1ubuntu1 (armhf)
snapd/2.54.3+20.04.1ubuntu0.2 (s390x, arm64, amd64, ppc64el)
sphinxbase/0.8+5prealpha+1-8 (armhf)
gemma/0.98.1+dfsg-1 (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/focal/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Verified:

root@focal-vm:~# dpkg -l locales | grep ^ii
ii locales 2.31-0ubuntu9.7 all GNU C Library: National Language (locale) data [support]
root@focal-vm:~# cp /etc/default/locale /tmp/locale
root@focal-vm:~# update-locale --locale-file /tmp/locale LANGUAGE = en_US.UTF-8
root@focal-vm:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-04-19 18:07:15.583098433 +0000
+++ /tmp/locale 2022-04-26 00:56:47.140767044 +0000
@@ -1 +1,2 @@
 LANG=en_US.UTF-8
+=
root@focal-vm:~# apt install -y -t focal-proposed libc6 locales libc-bin
[snip]

root@focal-vm:~# dpkg -l locales | grep ^ii
ii locales 2.31-0ubuntu9.9 all GNU C Library: National Language (locale) data [support]
root@focal-vm:~# cp /etc/default/locale /tmp/locale
root@focal-vm:~# update-locale --locale-file /tmp/locale LANGUAGE = en_US.UTF-8
root@focal-vm:~# diff -u /etc/default/locale /tmp/locale
root@focal-vm:~# update-locale --locale-file /tmp/locale LANGUAGE=en_US.UTF-8
root@focal-vm:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-04-26 00:58:34.429027581 +0000
+++ /tmp/locale 2022-04-26 00:58:39.333040731 +0000
@@ -1 +1,2 @@
 LANG=en_US.UTF-8
+LANGUAGE=en_US.UTF-8
root@focal-vm:~# update-locale --locale-file /tmp/locale LANGUAGE=en_GB.UTF-8
root@focal-vm:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-04-26 00:58:34.429027581 +0000
+++ /tmp/locale 2022-04-26 00:58:58.457092930 +0000
@@ -1 +1,2 @@
 LANG=en_US.UTF-8
+LANGUAGE=en_GB.UTF-8
root@focal-vm:~# update-locale --locale-file /tmp/locale LANGUAGE
root@focal-vm:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-04-26 00:58:34.429027581 +0000
+++ /tmp/locale 2022-04-26 00:59:11.493129343 +0000
@@ -1 +1,2 @@
 LANG=en_US.UTF-8
+#LANGUAGE=en_GB.UTF-8

The verification of the Stable Release Update for glibc has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package glibc - 2.31-0ubuntu9.9

---------------
glibc (2.31-0ubuntu9.9) focal; urgency=medium

  * Disable testsuite on riscv64. It is failing maths tests intermittently in
    ways that cannot be a glibc regression and is disabled in later series
    anyway.

glibc (2.31-0ubuntu9.8) focal; urgency=medium

  * Update for 20.04. (LP: #1951033)

  [ Balint Reczey ]
  * Cherry-pick upstream patch to fix building with -moutline-atomics
  * Prevent rare deadlock in pthread_cond_signal (LP: #1899800)

  [ Matthias Klose ]
  * Revert: Use DH_COMPAT=8 for dh_strip to fix debug sections for valgrind.
    Enables debugging ld.so related issues. (LP: #1918035)
  * Don't strip ld.so on armhf. (LP: #1927192)

  [ Gunnar Hjalmarsson ]
  * d/local/usr_sbin/update-locale: improve sanity checks. (LP: #1892825)

  [ Heitor Alves de Siqueira ]
  * d/p/u/git-lp1928508-reversing-calculation-of-__x86_shared_non_temporal.patch:
    - Fix memcpy() performance regression on x86 AMD systems (LP: #1928508)

  [ Aurelien Jarno ]
  * debian/debhelper.in/libc.preinst: drop the check for kernel release
    > 255 now that glibc and preinstall script are fixed. (LP: #1962225)

  [ Michael Hudson-Doyle ]
  * libc6 on arm64 is now built with -moutline-atomics so libc6-lse can now be
    an empty package that is safe to remove. (LP: #1912652)
  * d/patches/u/aarch64-memcpy-improvements.patch: Backport memcpy
    improvements. (LP: #1951032)
  * Add test-float64x-yn to xfails on riscv64.

 -- Michael Hudson-Doyle <email address hidden> Thu, 07 Apr 2022 13:24:41 +1200

This was fixed in devel (and with that jammy) through the upload of glibc 2.35-0ubuntu1, even if it wasn't mentioned in d/changelog. So marking as fixed.

Hello bs, or anyone else affected,

Accepted glibc into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.27-3ubuntu1.6 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Verified that the new version does not generated bogus lines on bionic:

root@lp-1892825-bionic:~# cp /etc/default/locale /tmp/locale
root@lp-1892825-bionic:~# update-locale --locale-file /tmp/locale LANG = C.UTF-8
root@lp-1892825-bionic:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-05-09 15:53:23.000000000 +0000
+++ /tmp/locale 2022-05-13 03:05:13.859996448 +0000
@@ -1 +1 @@
-LANG=C.UTF-8
+#LANG=C.UTF-8
root@lp-1892825-bionic:~# update-locale --locale-file /tmp/locale LANG=en_US.UTF-8
root@lp-1892825-bionic:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-05-09 15:53:23.000000000 +0000
+++ /tmp/locale 2022-05-13 03:05:36.008238719 +0000
@@ -1 +1 @@
-LANG=C.UTF-8
+LANG=en_US.UTF-8
root@lp-1892825-bionic:~# update-locale --locale-file /tmp/locale LANG=
root@lp-1892825-bionic:~# update-locale --locale-file /tmp/locale LANG
root@lp-1892825-bionic:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-05-09 15:53:23.000000000 +0000
+++ /tmp/locale 2022-05-13 03:05:43.680321932 +0000
@@ -1 +1 @@
-LANG=C.UTF-8
+#LANG=
root@lp-1892825-bionic:~# cp /etc/default/locale /tmp/locale
root@lp-1892825-bionic:~# update-locale --locale-file /tmp/locale LANG
root@lp-1892825-bionic:~# diff -u /etc/default/locale /tmp/locale
--- /etc/default/locale 2022-05-09 15:53:23.000000000 +0000
+++ /tmp/locale 2022-05-13 03:05:56.384458949 +0000
@@ -1 +1 @@
-LANG=C.UTF-8
+#LANG=C.UTF-8
root@lp-1892825-bionic:~# dpkg-query -W locales
locales 2.27-3ubuntu1.6

All autopkgtests for the newly accepted glibc (2.27-3ubuntu1.6) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

docker.io/20.10.7-0ubuntu5~18.04.3 (i386, amd64, s390x, arm64, ppc64el)
sbd/1.3.1-2 (amd64)
chromium-browser/100.0.4896.127-0ubuntu0.18.04.1 (armhf)
pymol/1.8.4.0+dfsg-1build1 (s390x, ppc64el)
nvidia-graphics-drivers-390/390.147-0ubuntu0.18.04.1 (i386)
pgbouncer/1.8.1-1build1 (amd64)
r-cran-urltools/1.7.0-1ubuntu1 (arm64, ppc64el)
firefox/100.0+build2-0ubuntu0.18.04.1 (arm64)
python-llfuse/1.3.3+dfsg-3 (arm64)
c-icap/1:0.4.4-1 (ppc64el)
givaro/4.0.2-8ubuntu1 (armhf)
apport/2.20.9-0ubuntu7.27 (amd64)
threadweaver/5.44.0-0ubuntu1 (i386)
apt/1.6.14 (arm64)
containerd/1.5.5-0ubuntu3~18.04.2 (amd64, arm64)
glibc/2.27-3ubuntu1.6 (armhf)
cura-engine/1:3.1.0-2 (arm64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/bionic/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

This bug was fixed in the package glibc - 2.27-3ubuntu1.6

---------------
glibc (2.27-3ubuntu1.6) bionic; urgency=medium

  [ Gunnar Hjalmarsson ]
  * d/local/usr_sbin/update-locale: improve sanity checks. (LP: #1892825)

  [ Aurelien Jarno ]
  * debian/debhelper.in/libc.preinst: drop the check for kernel release
    > 255 now that glibc and preinstall script are fixed. (LP: #1962225)

 -- Michael Hudson-Doyle <email address hidden> Tue, 03 May 2022 22:19:39 +1200

Ubuntu 21.10 (Impish Indri) has reached end of life, so this bug will not be fixed for that specific release.