PAM is not working and reports error: Failed at step PAM spawnin ... Operation not permitted

This document (7023782) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12


Server was upgraded from SLES 11 SP4 to SLES 12 SP3 | SP4. The /var/log/messages contains a lot of messages e.g. 
Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted
Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted
Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted
Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted


The above issue can be fixed by replacing pam_unix2 with pam_unix.  
After upgrade, search for new PAM related configuration (/etc/pam.d/*.rpmnew) and move them. E.g. 
Save the current files:
cp /etc/pam.d/common-account /etc/pam.d/common-account.backup
cp /etc/pam.d/common-auth /etc/pam.d/common-auth.backup
cp /etc/pam.d/common-password /etc/pam.d/common-password.backup
cp /etc/pam.d/common-session /etc/pam.d/common-session.backup
Then, use the newer pam files:
cp /etc/pam.d/common-account.rpmnew /etc/pam.d/common-account
cp /etc/pam.d/common-auth.rpmnew /etc/pam.d/common-auth
cp /etc/pam.d/common-password.rpmnew /etc/pam.d/common-password
cp /etc/pam.d/common-session.rpmnew /etc/pam.d/common-session

Another cause for this problem happens when the user doesn't have an entry in /etc/shadow file. 


SLES 12 uses pam_unix by default but SLES 11 is using pam_unix2.
This error comes from PAM, please double check PAM configuration.


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  • Document ID:7023782
  • Creation Date: 20-Mar-2019
  • Modified Date:14-Dec-2020
    • SUSE Linux Enterprise Server

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