From: Zheng Wang zyytlz.wz@163.com
[ 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 795be33f2892d..02893600db390 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;