User not recognized when logging into an OEL 7.9 or 8.10 machine with uek kernels

Products

• CA Privileged Access Manager - Server Control (PAMSC)

Issue/Introduction

Running a selang after login the user is not recognized. In the trace the following is observed

31 Mar 2025 12:42:54 D LOGIN        ?_<User>           1055 10 <server_name> selang

And sewhoami does not work either (it comes back empty)

 

Environment

PAM SC 14.10.50.X, 14.10.60.X and 14.10.70.X prior to version 72

OEL 7.9 and 8.10 with kernels 5.4.17-2136.338.4.2.el7uek.x86_64 and  5.15.0-306.177.4.el8uek.x86_64 & OEL7.9 5.4.17-2136.338.4.2.el7uek respectively

Cause

This is caused by the uek kernel requiring ftrace support enabled and the PAM SC version installed not having support of ftrace built in for this kernel

Resolution

The correction for this error is included in any full build and certified patch an or at a later build than 14.10.70.54. If you can't upgrade to this version for any reason, please contact Support for a possible other solution

To work properly, ftrace must be enabled in the kernel. To do so  set “kernel.ftrace_enabled=1” token in  “/etc/sysctl.d/99-sysctl.conf” file and reboot machine (Permanent settting) or echo 1 > /proc/sys/kernel/ftrace_enabled (Short term solution until reboot)