linux-kernel - Re: [syzbot] Re: [syzbot] [wpan?] [usb?] BUG: corrupted list in ieee802154_if

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Message-ID: <672dda7f.050a0220.3d9cb.000a.GAE@google.com>
Date: Fri, 08 Nov 2024 01:31:43 -0800
From: syzbot <syzbot+985f827280dc3a6e7e92@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [wpan?] [usb?] BUG: corrupted list in ieee802154_if_remove

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Subject: Re: [syzbot] [wpan?] [usb?] BUG: corrupted list in ieee802154_if_remove
Author: lizhi.xu@...driver.com

net device has been unregistered ?

#syz test

diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index c0e2da5072be..57de7ca7954b 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -683,6 +683,10 @@ void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 {
 	ASSERT_RTNL();
 
+	printk("sd: %p, sdl: %p, dev: %p, %s\n", sdata, sdata->list, sdata->dev, __func__);
+	if (sdata->dev->reg_state == NETREG_UNREGISTERING)
+		return;
+
 	mutex_lock(&sdata->local->iflist_mtx);
 	list_del_rcu(&sdata->list);
 	mutex_unlock(&sdata->local->iflist_mtx);
@@ -697,6 +701,7 @@ void ieee802154_remove_interfaces(struct ieee802154_local *local)
 
 	mutex_lock(&local->iflist_mtx);
 	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
+		printk("sd: %p, sdl: %p, dev: %p, %s\n", sdata, sdata->list, sdata->dev, __func__);
 		list_del(&sdata->list);
 
 		unregister_netdevice(sdata->dev);