Land #11081, Add Msf::Post::Linux::Kernel.lkrg_installed? method

lib/msf/core/post/linux/kernel.rb

@@ -202,6 +202,15 @@ module Kernel
     raise 'Could not determine system mmap_min_addr'
   end
 
+  #
+  # Returns true if Linux Kernel Runtime Guard (LKRG) kernel module is installed
+  #
+  def lkrg_installed?
+    cmd_exec('test -d /proc/sys/lkrg && echo true').to_s.strip.include? 'true'
+  rescue
+    raise 'Could not determine LKRG status'
+  end
+
   #
   # Returns true if grsecurity is installed
   #

modules/post/linux/gather/enum_protections.rb

@@ -87,6 +87,12 @@ class MetasploitModule < Msf::Post
       report r
     end
 
+    if lkrg_installed?
+      r = 'LKRG is installed'
+      print_good r
+      report r
+    end
+
     if grsec_installed?
       r = 'grsecurity is installed'
       print_good r