From: Yousef Alhouseen Date: Wed, 1 Jul 2026 16:42:22 +0000 (+0200) Subject: mac802154: remove interfaces with RCU list deletion X-Git-Tag: v7.2-rc3~29^2~31 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=539dfcf69105d8d3d4d677b71de6e5ede2e6dfa0;p=thirdparty%2Fkernel%2Flinux.git mac802154: remove interfaces with RCU list deletion Queue wake, stop, and disable paths walk local->interfaces under RCU. The bulk hardware teardown path removes entries with list_del(), so an asynchronous transmit completion can follow a poisoned list node in ieee802154_wake_queue(). Use list_del_rcu() as in the single-interface removal path. The following unregister_netdevice() waits for in-flight RCU readers before freeing the netdevice, so no separate grace-period wait is needed. Fixes: 592dfbfc72f5 ("mac820154: move interface unregistration into iface") Reported-by: syzbot+36256deb69a588e9290e@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=36256deb69a588e9290e Cc: stable@vger.kernel.org Signed-off-by: Yousef Alhouseen Reviewed-by: Kuniyuki Iwashima Reviewed-by: Miquel Raynal Link: https://patch.msgid.link/20260701164222.9094-1-alhouseenyousef@gmail.com Signed-off-by: Paolo Abeni --- diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c index 000be60d9580..b823720630e7 100644 --- a/net/mac802154/iface.c +++ b/net/mac802154/iface.c @@ -703,7 +703,7 @@ void ieee802154_remove_interfaces(struct ieee802154_local *local) mutex_lock(&local->iflist_mtx); list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { - list_del(&sdata->list); + list_del_rcu(&sdata->list); unregister_netdevice(sdata->dev); }