Merge "Restrict Access to Kernel Message Buffer"

puppet/services/kernel.yaml

@@ -56,5 +56,7 @@ outputs:
             value: 10000
           kernel.pid_max:
             value: {get_param: KernelPidMax}
+          kernel.dmesg_restrict:
+            value: 1
       step_config: |
         include ::tripleo::profile::base::kernel

releasenotes/notes/restrict-access-to-kernel-message-buffer-809160674b92a073.yaml

@@ -0,0 +1,11 @@
+---
+upgrade:
+  - |
+    The kernel.dmesg_restrict is now set to 1 to prevent exposure of sensitive
+    kernel address information with unprivileged access. Deployments that set
+    or depend on values other than 1 for kernel.dmesg_restrict may be affected
+    by upgrading.
+security:
+  - |
+    Kernel syslog contains sensitive kernel address information, setting
+    kernel.dmesg_restrict to avoid unprivileged access to this information.