4.14-stable review patch. If anyone has any objections, please let me know.
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From: Zheng Wang zyytlz.wz@163.com
commit 73f7b171b7c09139eb3c6a5677c200dc1be5f318 upstream.
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.
Fixes: CVE-2023-1989 Fixes: ddbaf13e3609 ("[Bluetooth] Add generic driver for Bluetooth SDIO devices") Cc: stable@vger.kernel.org Signed-off-by: Zheng Wang zyytlz.wz@163.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com [ Denis: Added CVE-2023-1989 and fixes tags. ] Signed-off-by: Denis Efremov (Oracle) efremov@linux.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/bluetooth/btsdio.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/bluetooth/btsdio.c +++ b/drivers/bluetooth/btsdio.c @@ -356,6 +356,7 @@ static void btsdio_remove(struct sdio_fu if (!data) return;
+ cancel_work_sync(&data->work); hdev = data->hdev;
sdio_set_drvdata(func, NULL);