linux-kernel - Re: [syzbot] Re: KASAN: use-after-free Read in netdev_unregister

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Message-ID: <6724c2a0.050a0220.35b515.016f.GAE@google.com>
Date: Fri, 01 Nov 2024 04:59:28 -0700
From: syzbot <syzbot+6cf5652d3df49fae2e3f@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: KASAN: use-after-free Read in netdev_unregister_kobject

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***

Subject: Re: KASAN: use-after-free Read in netdev_unregister_kobject
Author: dmantipov@...dex.ru

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next dff8a64238a3f951dbf0930bac915eec7cae8200

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 367e32fe30eb..80ac537fa500 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -73,6 +73,8 @@ void hci_conn_del_sysfs(struct hci_conn *conn)
 		return;
 	}
 
+	device_move(&conn->dev, NULL, DPM_ORDER_DEV_LAST);
+
 	while (1) {
 		struct device *dev;
 
-- 
2.47.0