From eeee52cfd1d639774c9812e8890631404a057dd2 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 4 Sep 2026 17:01:59 +0200 Subject: [PATCH] wifi: cfg80211: restore netns_immutable on failures Switching a wiphy's netns has to clear netns_immutable before moving interfaces, but then if any of the interfaces fails to move, it gets netns_immutable cleared forever. Then userspace can move it by itself, breaking the assumption that they all move together. Fix the order here and always reset netns_immutable after attempting the move. Assisted-by: LLM Fixes: 463d018323851 ("cfg80211: make aware of net namespaces") Link: https://patch.msgid.link/20260904170220.7ea88157dcbc.Id868585a790be8b9ece9b39b0db464a5963faaf3@changeid Signed-off-by: Johannes Berg --- net/wireless/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/core.c b/net/wireless/core.c index 668380deec7d..043bb57b0556 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -167,9 +167,9 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, continue; wdev->netdev->netns_immutable = false; err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); + wdev->netdev->netns_immutable = true; if (err) break; - wdev->netdev->netns_immutable = true; } if (err) {