[Bug 1971612] Autopkgtest regression report (glibc/2.35-0ubuntu3.1)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted glibc (2.35-0ubuntu3.1) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

macaulay2/1.19.1+ds-6 (armhf)
oss4/4.2-build2010-5ubuntu9 (amd64)
packer/1.6.6+ds1-4 (s390x)
network-manager/1.36.6-0ubuntu2 (arm64)
hilive/2.0a-3build3 (arm64)
openjdk-lts/11.0.15+10-0ubuntu0.22.04.1 (armhf)
ruby-mysql2/0.5.3-3ubuntu4 (s390x, arm64, ppc64el, armhf)
prometheus/2.31.2+ds1-1ubuntu1 (armhf)
umockdev/0.17.7-1 (s390x)
mbedtls/2.28.0-1build1 (s390x)
golang-v2ray-core/4.34.0-5 (armhf)
slixmpp/1.7.1-1build1 (s390x)
nwchem/7.0.2-3 (arm64)
pappl/1.0.3-2 (s390x)
golang-github-bmatsuo-lmdb-go/1.8.0+git20170215.a14b5a3-2 (amd64)
ruby-standalone/3.0~1 (s390x)
seqkit/2.1.0+ds-1 (s390x)
pandas/1.3.5+dfsg-3 (s390x)
netplan.io/0.104-0ubuntu2 (arm64)
pyfai/0.21.1+dfsg1-1build1 (ppc64el)
iptables/1.8.7-1ubuntu5 (i386, s390x)
golang-github-influxdata-tail/1.0.0+git20180327.c434825-4 (s390x, ppc64el)
opensaml/3.2.1-1 (arm64)
node-iconv/3.0.1+~3.0.0-1 (armhf)
ubuntu-image/2.2+22.04ubuntu3 (s390x)
fenix/0.92a.dfsg1-12.1 (i386)
notary/0.7.0+ds1-1 (arm64)
rustc/1.59.0+dfsg1-1~ubuntu2~22.04.1 (arm64)
tmux/3.2a-4build1 (s390x)
genshi/0.7.6-1build1 (s390x)


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/jammy/update_excuses.html#glibc

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

Thank you!

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https://bugs.launchpad.net/bugs/1971612

Title:
  [UBUNTU 22.04] GLIBC: Adding new s390 platform IBM z16

Status in Ubuntu on IBM z Systems:
  In Progress
Status in glibc package in Ubuntu:
  New
Status in glibc source package in Impish:
  Won't Fix
Status in glibc source package in Jammy:
  Fix Committed
Status in glibc source package in Kinetic:
  New

Bug description:
  SRU Justification:
  ==================

  [Impact]

   * This is a hardware enablement SRU to improve IBM z16 support.

   * A fatal glibc error is dumped if glibc was build with an
     architecture level set for z16, but run on an older machine.
     (See dl-hwcap-check.h.)

   * Hence z16 is added as new s390 platform,

   * the new IBM z16 is added to platform string array,

   * the macro _DL_PLATFORMS_COUNT is incremented.

   * '_dl_hwcaps_subdir' is extended by "z16" if HWCAP_S390_VXRS_PDE2
     is set,

   * and 'tst-glibc-hwcaps.c' is extended in order to test z16 via
     new marker5.

  [Test Plan]

   * An IBM zSystems (or LinuxONE) system,
     with Ubuntu 22.04 LTS installed.

   * Install the updated libc6 package on different zSystems
     hardware generations for regression testing, since
     the patched libc6 should not cause any changed behavior
     or impact on existing IBM zSystems hardware.

   * Test of the glibc-hwcaps feature is covered by tst-glibc-hwcaps.c test
     from glibc-testsuite.

   * In short: Different shared libraries are placed in the z16/z15/...
     subdirectories.
     A runtime-check tests whether the correct library was loaded on
     the particular machine.

   * IBM is going to test this feature on a z16 as soon as a patched
     libc6 package is available.

  [Where problems could occur]

   * There could be problems with the newly introduced marker5
     (libmarkermod5-1.so) in sysdeps/s390/s390-64/Makefile.
     These should largely occur already at build time,
     or in 'tst-glibc-hwcaps.c'.

   * The increased 'DL_PLATFORMS_COUNT' shouldn't harm.

   * Problems could occur is the hardware capabilities (hwcap) are not properly
     identified at 'dl-hwcap-check.h' and 'dl-hwcaps-subdirs.c'.

   * Wrong (not existing) capabilities might be assumed that could
     eventually lead to crashes in attempts to use them.

   * The majority of the changes are under sysdeps/s390 and with that
     hardware specific, other are in script and Makefile.

  [Other Info]

   * IBM z16 exploitation is introduced with 22.04 LTS, hence
     this patch is not needed for older Ubuntu releases.
  __________

  After IBM z16 has been announced, we need to add the new s390 platform
  in glibc.

  S390: Add new s390 platform z16.
  https://sourceware.org/git/?p=glibc.git;a=commit;h=2376944b9e5c0364b9fb473e4d8dabca31b57167

  Backport to glibc 2.35 release branch:
  https://sourceware.org/git/?p=glibc.git;a=commit;h=6583d534458e7f8beec8d0766b6db0bdaae6749c

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