File 0001_shared-mounts.patch of Package python-kiwi

diff --git a/kiwi/mount_manager.py b/kiwi/mount_manager.py
index 2517fc9..3d70229 100644
--- a/kiwi/mount_manager.py
+++ b/kiwi/mount_manager.py
@@ -81,6 +81,9 @@ class MountManager:
             Command.run(
                 ['mount', '-n', '--bind', self.device, self.mountpoint]
             )
+            Command.run(
+                ['mount', '--make-shared', self.mountpoint]
+            )
 
     def overlay_mount(self, lower: str) -> None:
         self.device = 'overlay'
@@ -122,6 +125,9 @@ class MountManager:
             Command.run(
                 ['mount'] + option_list + [self.device, self.mountpoint]
             )
+            Command.run(
+                ['mount', '--make-shared', self.mountpoint]
+            )
 
     def umount_lazy(self) -> None:
         """