Forwarded: [PATCH test] wifi: mac80211: acquire wiphy lock in ieee80211_uninit()

[syzbot <syzbot+e9cbd080a7801f06cf08@syzkaller.appspotmail.com>]

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

***

Subject: [PATCH test] wifi: mac80211: acquire wiphy lock in ieee80211_uninit()
Author: rajojha047@gmail.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 842bfb4a7cb6..c011e40eb351 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -950,9 +950,13 @@ static void ieee80211_unlist_sdata(struct ieee80211_sub_if_data *sdata)
 static void ieee80211_uninit(struct net_device *dev)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct wiphy *wiphy = sdata->local->hw.wiphy;
 
 	ieee80211_unlist_sdata(sdata);
+
+	wiphy_lock(wiphy);
 	ieee80211_teardown_sdata(sdata);
+	wiphy_unlock(wiphy);
 }
 
 static int ieee80211_netdev_setup_tc(struct net_device *dev,