Debian Bug report logs - #599731
libpam-systemd: su sessions end with "su: System error"

Toggle useless messages

Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Joerg <joerg@schuetter.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: libpam-systemd: su sessions end with "su: System error"

Date: Sun, 10 Oct 2010 17:50:00 +0200

Package: libpam-systemd
Version: 11-1
Severity: normal

After booting the system with init=/bin/systemd some cron-jobs are reporting an error.

Here is the part from /var/log/auth.log in case of the cron-job:
pc su[10301]: Successful su for j42 by root
pc su[10301]: + ??? root:j42
pc su[10301]: pam_unix(su:session): session opened for user j42 by (uid=0)
pc su[10301]: pam_systemd(su:session): Moving new user session for j42 into control group /user/j42/66c.
pc su[10301]: pam_unix(su:session): session closed for user j42
pc su[10301]: pam_systemd(su:session): Failed to lock runtime directory: Permission denied
pc su[10301]: pam_close_session: System error

The requested programs are executed fine, so the croned job is working.

The same happens when starting the su command from the command line.

/bin/su - mirror -c "/bin/date"
Sun Oct 10 17:35:47 CEST 2010
su: System error

Here is the part from /var/log/auth.log in case of the /bin/date:
pc su[12577]: Successful su for mirror by root
pc su[12577]: + /dev/pts/2 root:mirror
pc su[12577]: pam_unix(su:session): session opened for user mirror by j42(uid=0)
pc su[12577]: pam_systemd(su:session): Moving new user session for mirror into control group /user/mirror/83c.
pc su[12577]: pam_unix(su:session): session closed for user mirror
pc su[12577]: pam_systemd(su:session): Failed to lock runtime directory: Permission denied
pc su[12577]: pam_close_session: System error


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-xen-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libpam-systemd depends on:
ii  libc6                         2.11.2-6   Embedded GNU C Library: Shared lib
ii  libcap2                       1:2.19-3   support for getting/setting POSIX.
ii  libpam0g                      1.1.1-6    Pluggable Authentication Modules l
ii  systemd                       11-1       system and session manager

libpam-systemd recommends no packages.

libpam-systemd suggests no packages.

-- no debconf information

Message #10 received at 599731@bugs.debian.org (full text, mbox, reply):

From: Cesar Garcia <cesarg9@gmail.com>

To: 599731@bugs.debian.org

Subject: libpam-systemd: su sessions end with "su: System error"

Date: Sun, 28 Nov 2010 11:43:55 -0430

[Message part 1 (text/plain, inline)]

Same here, the bug is related to #580434 (su drops privileges before
calling pam_session_close), so it causes the Permission Denied messages.

I made a patch that moves the privilege change code to after the fork
call in the child process (same logic as coreutils and mac os
implementations of su), so the parent process can have privileges to
close the pam session.

[shadow-4.1.4.2-drop_privileges_after_fork.patch (text/x-patch, attachment)]

Message #19 received at 599731@bugs.debian.org (full text, mbox, reply):

From: Michael Biebl <biebl@debian.org>

To: 599731@bugs.debian.org, Joerg <joerg@schuetter.org>

Subject: libpam-systemd: su sessions end with "su: System error"

Date: Mon, 06 Feb 2012 17:27:19 +0100

[Message part 1 (text/plain, inline)]

I can no longer reproduce this issue.

Could you please test with the latest version and report back.

Thanks,
Michael
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

[signature.asc (application/pgp-signature, attachment)]

Message #24 received at 599731@bugs.debian.org (full text, mbox, reply):

From: Jörg Schütter <joerg@schuetter.org>

To: Michael Biebl <biebl@debian.org>

Cc: 599731@bugs.debian.org

Subject: Re: libpam-systemd: su sessions end with "su: System error"

Date: Fri, 10 Feb 2012 18:30:35 +0100

Hello Michael

On Mon, 06 Feb 2012 17:27:19 +0100
Michael Biebl <biebl@debian.org> wrote:

> I can no longer reproduce this issue.
> 
> Could you please test with the latest version and report back.

The same here, unable to reproduce (no error reported in the
logfiles).

Joerg

Message #29 received at 599731-done@bugs.debian.org (full text, mbox, reply):

From: Tollef Fog Heen <tfheen@err.no>

To: Jörg Schütter <joerg@schuetter.org>

Cc: 599731-done@bugs.debian.org

Subject: Re: Bug#599731: libpam-systemd: su sessions end with "su: System error"

Date: Fri, 29 Jun 2012 22:58:05 +0200

]] Jörg Schütter 

> Hello Michael
> 
> On Mon, 06 Feb 2012 17:27:19 +0100
> Michael Biebl <biebl@debian.org> wrote:
> 
> > I can no longer reproduce this issue.
> > 
> > Could you please test with the latest version and report back.
> 
> The same here, unable to reproduce (no error reported in the
> logfiles).

Ok, closing, assumed fixed.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are

Send a report that this bug log contains spam.