linux-kernel - Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in mgmt_pending

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Message-ID: <tencent_868A4B88749176DD66923DF7368C96523709@qq.com>
Date: Sun, 16 Nov 2025 16:02:27 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+9aa47cd4633a3cf92a80@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in mgmt_pending_remove

#syz test

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 262bf984d2aa..33e725798c34 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -9474,7 +9474,9 @@ void mgmt_index_removed(struct hci_dev *hdev)
 	if (hci_test_quirk(hdev, HCI_QUIRK_RAW_DEVICE))
 		return;
 
+	hci_dev_lock(hdev);
 	mgmt_pending_foreach(0, hdev, true, cmd_complete_rsp, &match);
+	hci_dev_unlock(hdev);
 
 	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
 		mgmt_index_event(MGMT_EV_UNCONF_INDEX_REMOVED, hdev, NULL, 0,