This is an example of the directory layout for the chroot/lib directory of a SELinux UML instance.
The whole directory is only needed if the system requires pam: 

-rwxr-xr-x  1 root root   pam_deny.so
-rwxr-xr-x  1 root root   pam_env.so
-rwxr-xr-x  1 root root   pam_permit.so
-rwxr-xr-x  1 root root   pam_rootok.so