Commit 73f7b171 authored by Zheng Wang's avatar Zheng Wang Committed by Luiz Augusto von Dentz
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Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition 



In btsdio_probe, the data->work is bound with btsdio_work. It will be
started in btsdio_send_frame.

If the btsdio_remove runs with a unfinished work, there may be a race
condition that hdev is freed but used in btsdio_work. Fix it by
canceling the work before do cleanup in btsdio_remove.

Signed-off-by: default avatarZheng Wang <zyytlz.wz@163.com>
Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
parent c95930ab

drivers/bluetooth/btsdio.c

+1 −0
Original line number Diff line number Diff line
@@ -358,6 +358,7 @@ static void btsdio_remove(struct sdio_func *func) 
	if (!data)

		return;



	cancel_work_sync(&data->work);

	hdev = data->hdev;



	sdio_set_drvdata(func, NULL);