From 8efae2112d910d8e5166dd0a836791b08721eef1 Mon Sep 17 00:00:00 2001
From: Zheng Wang <zyytlz.wz@163.com>
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
[ Upstream commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f ]
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@163.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/bluetooth/btsdio.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c
index 199e8f7d426d9..7050a16e7efeb 100644
--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -352,6 +352,7 @@ static void btsdio_remove(struct sdio_func *func)
BT_DBG("func %p", func);
+ cancel_work_sync(&data->work);
if (!data)
return;
--
2.30.2