[Bug 1947475] [NEW] PAM: pam_chroot.so not accessible after upgrade 21.04 > 21.10

[Maddes]

Public bug reported:

After upgrading Ubuntu server (AMD64) from 21.04 to 21.10 the module
pam_chroot.so cannot be loaded by PAM anymore.

21.10
-----
auth.log:
sshd: PAM unable to dlopen(pam_chroot.so): /lib/security/pam_chroot.so: cannot open shared object file: No such file or directory
sshd: PAM adding faulty module: pam_chroot.so

# find / -name 'pam_chroot.so'
/usr/lib/x86_64-linux-gnu/pam_chroot.so

21.04
-----
# find / -type f -name 'pam_chroot.so'
/usr/lib/security/pam_chroot.so

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: ubuntu-release-upgrader-core 1:21.10.8
ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14
Uname: Linux 5.13.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu70
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
Date: Sat Oct 16 21:02:22 2021
InstallationDate: Installed on 2020-12-07 (313 days ago)
InstallationMedia: Ubuntu-Server 20.10 "Groovy Gorilla" - Release amd64 (20201022)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to impish on 2021-10-16 (0 days ago)
VarLogDistupgradeXorgFixuplog:
 INFO:root:/usr/bin/do-release-upgrade running
 INFO:root:No xorg.conf, exiting

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade impish

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https://bugs.launchpad.net/bugs/1947475

Title:
  PAM: pam_chroot.so not accessible after upgrade 21.04 > 21.10

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  After upgrading Ubuntu server (AMD64) from 21.04 to 21.10 the module
  pam_chroot.so cannot be loaded by PAM anymore.

  21.10
  -----
  auth.log:
  sshd: PAM unable to dlopen(pam_chroot.so): /lib/security/pam_chroot.so: cannot open shared object file: No such file or directory
  sshd: PAM adding faulty module: pam_chroot.so

  # find / -name 'pam_chroot.so'
  /usr/lib/x86_64-linux-gnu/pam_chroot.so

  21.04
  -----
  # find / -type f -name 'pam_chroot.so'
  /usr/lib/security/pam_chroot.so

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: ubuntu-release-upgrader-core 1:21.10.8
  ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14
  Uname: Linux 5.13.0-19-generic x86_64
  ApportVersion: 2.20.11-0ubuntu70
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  Date: Sat Oct 16 21:02:22 2021
  InstallationDate: Installed on 2020-12-07 (313 days ago)
  InstallationMedia: Ubuntu-Server 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to impish on 2021-10-16 (0 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting

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