4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zheng Wang <zyytlz.wz@xxxxxxx>
commit 73f7b171b7c09139eb3c6a5677c200dc1be5f318 upstream.
In btsdio_probe, the data->work is bound with btsdio_work. It will be
started in btsdio_send_frame.
If the btsdio_remove runs with a unfinished work, there may be a race
condition that hdev is freed but used in btsdio_work. Fix it by
canceling the work before do cleanup in btsdio_remove.
Fixes: CVE-2023-1989
Fixes: ddbaf13e3609 ("[Bluetooth] Add generic driver for Bluetooth SDIO devices")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Zheng Wang <zyytlz.wz@xxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
[ Denis: Added CVE-2023-1989 and fixes tags. ]
Signed-off-by: Denis Efremov (Oracle) <efremov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/bluetooth/btsdio.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -356,6 +356,7 @@ static void btsdio_remove(struct sdio_fu
if (!data)
return;
+ cancel_work_sync(&data->work);
hdev = data->hdev;
sdio_set_drvdata(func, NULL);
