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

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[ 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: 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
commit a18fb433ce
1 changed files with 1 additions and 0 deletions
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1
drivers/bluetooth/btsdio.c
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@ -343,6 +343,7 @@ static void btsdio_remove(struct sdio_func *func)
BT_DBG("func %p", func);
cancel_work_sync(&data->work);
if (!data)
return;