[Bug 961101] Re: sudo crashes with pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed.

[Christian Mertes]

I should add that a logout/relogin is also sufficient to reset the sudo
capability. Also, for anyone else affected: the only workaround I could
come up with is a sudo bash directly after login and do everything you
need root for from there. That way you don't have to log out when this
happens. It also defies the purpose of sudo in a way but well.

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Title:
  sudo crashes with pam_mount.c:417: modify_pm_count: Assertion `user !=
  ((void *)0)' failed.

Status in “sudo” package in Ubuntu:
  New

Bug description:
  For a while using sudo is not a problem but suddenly it starts failing
  every time with:

  sudo: pam_mount.c:417: modify_pm_count: Assertion `user != ((void
  *)0)' failed.

  It just happened *during* an "apt-get dist-upgrade".  A reboot is
  necessary to recover the ability to sudo.

  This seems to be the same problem as the upstream bug
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648698 "sudo: calls
  pam_close_session without prior pam_open_session"

  I changed my /etc/security/pam_mount.conf.xml according to this (German) howto http://wiki.ubuntuusers.de/Daten_verschl%C3%BCsseln#luks
  The file is attached to this bug, as well as an strace of sudo.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: libpam-mount 2.10-2build1
  ProcVersionSignature: Ubuntu 3.2.0-19.30-generic 3.2.11
  Uname: Linux 3.2.0-19-generic x86_64
  ApportVersion: 1.94.1-0ubuntu2
  Architecture: amd64
  Date: Wed Mar 21 12:43:58 2012
  InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120201.1)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, user)
   LANG=en_GB.UTF-8
   SHELL=/usr/bin/fizsh
  SourcePackage: libpam-mount
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.security.pam.mount.conf.xml: 2012-03-20T22:28:41.812564

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