[PATCH v1 net-next 05/14] net: Hold __rtnl_net_lock() in netdev_wait_allrefs_any().
From: Kuniyuki Iwashima <kuniyu@google.com>
Date: 2026-07-01 21:43:47
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Currently, netdev_run_todo() processes pending devices from multiple namespaces in a batch. To expand the per-netns RTNL coverage for NETDEV_UNREGISTER, let's acquire __rtnl_net_lock() in netdev_wait_allrefs_any(). Note that netdev_run_todo() itself will need to be namespacified before RTNL is removed. Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> --- net/core/dev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index c477c4f84ed9..48818a194fa5 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -11608,8 +11608,13 @@ static struct net_device *netdev_wait_allrefs_any(struct list_head *list) rtnl_lock(); /* Rebroadcast unregister notification */ - list_for_each_entry(dev, list, todo_list) + list_for_each_entry(dev, list, todo_list) { + struct net *net = dev_net(dev); + + __rtnl_net_lock(net); call_netdevice_notifiers(NETDEV_UNREGISTER, dev); + __rtnl_net_unlock(net); + } __rtnl_unlock(); rcu_barrier();
--
2.55.0.rc0.799.gd6f94ed593-goog