Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work

[ Upstream commit 1e9ac114c4 ]

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: ddbaf13e36 ("[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>

This commit is contained in:

Zheng Wang

2023-03-09 16:07:39 +08:00

committed by

Greg Kroah-Hartman

parent fce0e47e9e

commit da3d3fdfb4

1 changed files with 1 additions and 0 deletions

									
										drivers/bluetooth/btsdio.c
									
		+1
		
												View File
												
					@@ -352,6 +352,7 @@ static void btsdio_remove(struct sdio_func *func)

						BT_DBG("func %p", func);

						BT_DBG("func %p", func);

						cancel_work_sync(&data->work);

						if (!data)

						if (!data)

							return;

							return;