In btsdio_probe, &data->work was bound with btsdio_work.In
btsdio_send_frame, it was started by schedule_work.
If we call btsdio_remove with an unfinished job, there may
be a race condition and cause UAF bug on hdev.
Fixes: ddbaf13e3609 ("[Bluetooth] Add generic driver for Bluetooth SDIO devices")
Signed-off-by: Zheng Wang <zyytlz.wz@xxxxxxx>
---
drivers/bluetooth/btsdio.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c
index 795be33f2892..02893600db39 100644
--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -354,6 +354,7 @@ static void btsdio_remove(struct sdio_func *func)
BT_DBG("func %p", func);
+ cancel_work_sync(&data->work);
if (!data)
return;
--
2.25.1
