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-rw-r--r--nixos/doc/manual/configuration/grsecurity.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/nixos/doc/manual/configuration/grsecurity.xml b/nixos/doc/manual/configuration/grsecurity.xml
index 06e7617d58eb..3c17fc19397f 100644
--- a/nixos/doc/manual/configuration/grsecurity.xml
+++ b/nixos/doc/manual/configuration/grsecurity.xml
@@ -265,6 +265,11 @@
   <sect1 xml:id="sec-grsec-issues"><title>Issues and work-arounds</title>
 
   <itemizedlist>
+    <listitem><para>Access to EFI runtime services is disabled by default:
+    this plugs a potential code injection attack vector; use
+    <option>security.grsecurity.disableEfiRuntimeServices</option> to override
+    this behavior.</para></listitem>
+
     <listitem><para>Virtualization: KVM is the preferred virtualization
     solution. Xen, Virtualbox, and VMWare are
     <emphasis>unsupported</emphasis> and most likely require a custom kernel.