bluez/0004-systemd-More-lockdown.patch

From b3ba84d0327cdda5621f3b4bde7d4cfa496d7c4a Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Wed, 13 Sep 2017 15:38:26 +0200
Subject: [PATCH 4/4] systemd: More lockdown

bluetoothd does not need to execute mapped memory, or real-time
access, so block those.
---
 src/bluetooth.service.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/bluetooth.service.in b/src/bluetooth.service.in
index 4daedef2a..f18801866 100644
--- a/src/bluetooth.service.in
+++ b/src/bluetooth.service.in
@@ -22,9 +22,15 @@ ProtectControlGroups=true
 ReadWritePaths=@statedir@
 ReadOnlyPaths=@confdir@
 
+# Execute Mappings
+MemoryDenyWriteExecute=true
+
 # Privilege escalation
 NoNewPrivileges=true
 
+# Real-time
+RestrictRealtime=true
+
 [Install]
 WantedBy=bluetooth.target
 Alias=dbus-org.bluez.service
-- 
2.21.0