[PATCH net-next v2 1/6] net: hold instance lock around NETDEV_DOWN/GOING_DOWN
From: Stanislav Fomichev <hidden>
Date: 2026-07-02 22:41:53
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <sdf@fomichev.me> --- 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); }
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2.53.0-Meta