Hello,

Scientific Linux release 6.9 (Carbon)
selinux-policy.noarch           3.7.19-307.el6_9.3   @sl-security
selinux-policy-targeted.noarch  3.7.19-307.el6_9.3   @sl-security

Selinux packages were updated on 26 Jan

Selinux is set to enforcing on this machine, but normally causes no 
problems and generates no messages.

This morning I found 24 log messages from around 4:14am yesterday, 
Saturday, 3 Feb. of the form

-------------------------
Feb 3 04:14:33 kernel: SELinux:  Context 
system_u:object_r:NetworkManager_etc_t:s0 is not valid (left unmapped). 
Feb 3 04:14:33 kernel: SELinux:  Context 
system_u:object_r:NetworkManager_etc_rw_t:s0 is not valid (left unmapped).
Feb 3 04:14:33 kernel: SELinux:  Context 
system_u:object_r:firewalld_etc_rw_t:s0 is not valid (left unmapped). 
Feb 3 04:14:34 kernel: SELinux:  Context 
system_u:object_r:systemd_unit_file_t:s0 is not valid (left unmapped).
-------------------------
(Lines broken for readability).

The logs show no such messages at any other time before or since, in 
particular none this morning.

Can anyone help me understand what these messages mean and whether I 
need to do anything about them?

Thanks,

Stephen Isard