From a3566049dc64f0016bc4e1f1e0484e37fb92d373 Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Sat, 22 Jun 2024 22:08:57 +0200
Subject: populate_dev: fix /dev/net/tun

Fixes: 8b98dc846e7b ("populate_dev: remove assumption that newdev does not shadow origdev")
---
 linuxnamespaces/__init__.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/linuxnamespaces/__init__.py b/linuxnamespaces/__init__.py
index 0af6dee..aff620e 100644
--- a/linuxnamespaces/__init__.py
+++ b/linuxnamespaces/__init__.py
@@ -446,6 +446,9 @@ def populate_dev(
         if tun:
             directories.add("net")
             files.add("net/tun")
+            bind_mounts["net/tun"] = exitstack.enter_context(
+                open_tree(origdev / "net/tun", OpenTreeFlags.OPEN_TREE_CLONE)
+            )
         mount(
             "devtmpfs",
             newdev,
-- 
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