[Bug 247125] Re: Segfault with pam_namespace

[Launchpad Bug Tracker]

[Expired for pam (Ubuntu) because there has been no activity for 60
days.]

** Changed in: pam (Ubuntu)
       Status: Incomplete => Expired

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to pam in Ubuntu.
https://bugs.launchpad.net/bugs/247125

Title:
  Segfault with pam_namespace

Status in “pam” package in Ubuntu:
  Expired

Bug description:
  Binary package hint: libpam-modules

  I'm trying to setup pam_namespace.so to get per-session (per-user?)
  mount points.  I thought I had it working for a couple of logins and
  then it stopped.  I had debug mode enabled, and it appears to stop
  right after parsing the /etc/security/namespace.conf file, then it
  segfaults.  I've tried using this module for both "login" and "sshd"
  with the same results for both.

  The pam module line I'm adding (I've tried a bunch of variations, but here is an example):
      session    required pam_namespace.so debug ignore_config_error ignore_instance_parent_mode

  The auth log looks like this:
      sshd[10826]: pam_unix(sshd:session): session opened for user lowell by (uid=0)
      sshd[10826]: pam_namespace(sshd:session): open_session - start
      sshd[10826]: pam_namespace(sshd:session): Parsing config file /etc/security/namespace.conf

  Each log in attempt just fails silently for "login", and reports "Connection reset by peer" with ssh.  The "dmesg" command reports a line like this for each login attempt:
      [34321.503759] login[8000]: segfault at 00000008 eip b7eee78d esp bfe9e480 error 4
      [35952.573257] sshd[10808]: segfault at 00000008 eip b793778d esp bfc42540 error 4

  My /etc/security/namespace.conf file contains the following:
      tmp     /tmp-inst/         both      root,adm

  I've double check my directory permissions for the instance
  directories in namespace.conf, so I don't think that is the issue.  I
  found out that if I comment everything out in namespace.conf, then
  logins will work; but then it doesn't actually do anything either.  I
  am using pam_encfs.so in my common-auth file, but don't think thats
  the issue since I have the same problem when I comment it out and use
  just the standard "auth required pam_unix.so" line.

  
  Linux lowellport 2.6.24-19-generic #1 SMP Wed Jun 18 14:43:41 UTC 2008 i686 GNU/Linux
  Description:    Ubuntu 8.04.1
  Release:        8.04
  libpam-modules 0.99.7.1-5ubuntu6.1

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/pam/+bug/247125/+subscriptions