From 5326fefb9fe8e7014f5d7246fa10ff0db7a968a3 Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Thu, 2 Jul 2026 15:41:45 -0700 Subject: [PATCH] net: hold instance lock around NETDEV_DOWN/GOING_DOWN Mirror what call_netdevice_register_net_notifiers does but for the teardown. Cover only DOWN and GOING_DOWN. UNREGISTER is still unlocked because of the SW devices using dev_xxx methods. Signed-off-by: Stanislav Fomichev Link: https://patch.msgid.link/20260702224150.3730033-2-sdf@fomichev.me Signed-off-by: Paolo Abeni --- net/core/dev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index 4b3d5cfdf6e0..9d49493f4fb5 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1912,9 +1912,11 @@ static void call_netdevice_unregister_notifiers(struct notifier_block *nb, struct net_device *dev) { if (dev->flags & IFF_UP) { + netdev_lock_ops(dev); call_netdevice_notifier(nb, NETDEV_GOING_DOWN, dev); call_netdevice_notifier(nb, NETDEV_DOWN, dev); + netdev_unlock_ops(dev); } call_netdevice_notifier(nb, NETDEV_UNREGISTER, dev); }