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Message-Id: <20230210041030.865478-1-zyytlz.wz@163.com>
Date: Fri, 10 Feb 2023 12:10:30 +0800
From: Zheng Wang <zyytlz.wz@....com>
To: marcel@...tmann.org
Cc: hackerzheng666@...il.com, alex000young@...il.com,
johan.hedberg@...il.com, luiz.dentz@...il.com, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, Zheng Wang <zyytlz.wz@....com>
Subject: [PATCH] Bluetooth: hci_core: Fix poential Use-after-Free bug in hci_remove_adv_monitor
In hci_remove_adv_monitor, if it gets into HCI_ADV_MONITOR_EXT_MSFT case,
the function will free the monitor and print its handle after that.
Fix it by switch the order.
Fixes: 7cf5c2978f23 ("Bluetooth: hci_sync: Refactor remove Adv Monitor")
Signed-off-by: Zheng Wang <zyytlz.wz@....com>
---
net/bluetooth/hci_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index b65c3aabcd53..db3352c60de6 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1980,9 +1980,9 @@ static int hci_remove_adv_monitor(struct hci_dev *hdev,
goto free_monitor;
case HCI_ADV_MONITOR_EXT_MSFT:
- status = msft_remove_monitor(hdev, monitor);
bt_dev_dbg(hdev, "%s remove monitor %d msft status %d",
hdev->name, monitor->handle, status);
+ status = msft_remove_monitor(hdev, monitor);
break;
}
--
2.25.1
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