Commit 73f7b171 authored by Zheng Wang's avatar Zheng Wang Committed by Luiz Augusto von Dentz

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
...@@ -358,6 +358,7 @@ static void btsdio_remove(struct sdio_func *func) ...@@ -358,6 +358,7 @@ static void btsdio_remove(struct sdio_func *func)
if (!data) if (!data)
return; return;
cancel_work_sync(&data->work);
hdev = data->hdev; hdev = data->hdev;
sdio_set_drvdata(func, NULL); sdio_set_drvdata(func, NULL);
......
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