Re: [syzbot] Re: [syzbot] [wpan?] [usb?] BUG: corrupted list in ieee802154_if_remove

[syzbot <syzbot+985f827280dc3a6e7e92@syzkaller.appspotmail.com>]

For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org.

***

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

net device has been unregistered ?

#syz test

diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index c0e2da5072be..7a033e0f82d8 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -683,6 +683,9 @@ void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 {
 	ASSERT_RTNL();
 
+	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);