[Bug 790532] Re: pam upgrade broke cron

[Bart Verwilst]

If it's indeed a problem in the package, maybe another upgrade would be
advisable, even if it's just to trigger a restart of the crons.. We have
1600 servers that need to have cron restarted now, if we wouldn't be
aware of this issue, this could really mess up vital parts of our
organisation that depend on timed executions. A new release that
restarts cron could make the amount of bad surpises over the next couple
of days a lot less for a lot of unaware system admins.

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https://bugs.launchpad.net/bugs/790532

Title:
  pam upgrade broke cron

Status in “unattended-upgrades” package in Ubuntu:
  New

Bug description:
  Binary package hint: unattended-upgrades

  Today, unattended-upgrade upgraded PAM:

  # fgrep pam /var/log/dpkg.log |grep upgrade
  2011-05-31 06:47:18 upgrade libpam0g 1.1.1-4ubuntu2 1.1.1-4ubuntu2.2
  2011-05-31 06:47:20 upgrade libpam-modules 1.1.1-4ubuntu2 1.1.1-4ubuntu2.2
  2011-05-31 06:47:24 upgrade libpam-runtime 1.1.1-4ubuntu2 1.1.1-4ubuntu2.2

  After this, cron was broken:

  
  May 31 06:46:01 dns-cbf CRON[15914]: pam_unix(cron:session): session opened for user nobody by (uid=0)
  May 31 06:46:01 dns-cbf CRON[15914]: pam_unix(cron:session): session closed for user nobody
  May 31 06:47:01 dns-cbf CRON[16042]: pam_unix(cron:session): session opened for user nobody by (uid=0)
  May 31 06:47:01 dns-cbf CRON[16042]: pam_unix(cron:session): session closed for user nobody
  May 31 06:48:01 dns-cbf CRON[16833]: PAM unable to dlopen(/lib/security/pam_env.so): /lib/libpam.so.0: version `LIBPAM_MODUTIL_1.1.3' not found (required by /lib/security/pam_env.so)
  May 31 06:48:01 dns-cbf CRON[16833]: PAM adding faulty module: /lib/security/pam_env.so
  May 31 06:48:01 dns-cbf CRON[16833]: pam_unix(cron:session): session opened for user nobody by (uid=0)
  May 31 06:49:01 dns-cbf CRON[16893]: PAM unable to dlopen(/lib/security/pam_env.so): /lib/libpam.so.0: version `LIBPAM_MODUTIL_1.1.3' not found (required by /lib/security/pam_env.so)
  May 31 06:49:01 dns-cbf CRON[16893]: PAM adding faulty module: /lib/security/pam_env.so
  May 31 06:49:01 dns-cbf CRON[16893]: pam_unix(cron:session): session opened for user nobody by (uid=0)
  May 31 06:50:01 dns-cbf CRON[16959]: PAM unable to dlopen(/lib/security/pam_env.so): /lib/libpam.so.0: version `LIBPAM_MODUTIL_1.1.3' not found (required by /lib/security/pam_env.so)
  May 31 06:50:01 dns-cbf CRON[16959]: PAM adding faulty module: /lib/security/pam_env.so

  Why was cron not being restarted as required by a PAM update? The
  solution was to manually restart cron on all affected machines :(

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: unattended-upgrades 0.62ubuntu1
  ProcVersionSignature: Ubuntu 2.6.35-25.44-server 2.6.35.10
  Uname: Linux 2.6.35-25-server x86_64
  Architecture: amd64
  Date: Tue May 31 10:22:22 2011
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: unattended-upgrades