From 1e9ac114c4428fdb7ff4635b45d4f46017e8916f Mon Sep 17 00:00:00 2001 From: Zheng Wang Date: Thu, 9 Mar 2023 16:07:39 +0800 Subject: [PATCH] Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work 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 Signed-off-by: Luiz Augusto von Dentz --- 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;