From 45201111a6b1f2b64d740a5b24073128b4d7a134 Mon Sep 17 00:00:00 2001
From: Balint Reczey <balint.reczey@canonical.com>
Date: Mon, 25 Sep 2017 11:42:28 -0400
Subject: [PATCH] Mount using --make-rslave to ensure safe unmounts for rbind
 mounts

---
 live-build/functions | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/live-build/functions b/live-build/functions
index 4c3049ec..2106df21 100644
--- a/live-build/functions
+++ b/live-build/functions
@@ -79,7 +79,7 @@ mount_image() {
 setup_mountpoint() {
     local mountpoint="$1"
 
-    mount --rbind /dev "$mountpoint/dev"
+    mount --rbind --make-rslave /dev "$mountpoint/dev"
     mount proc-live -t proc "$mountpoint/proc"
     mount sysfs-live -t sysfs "$mountpoint/sys"
     mount -t tmpfs none "$mountpoint/tmp"