tee: optee: fix possible memory leak in optee_register_device()

If device_register() returns error in optee_register_device(),
the name allocated by dev_set_name() need be freed. As comment
of device_register() says, it should use put_device() to give
up the reference in the error path. So fix this by calling
put_device(), then the name can be freed in kobject_cleanup(),
and optee_device is freed in optee_release_device().

Fixes: c3fa24af9244 ("tee: optee: add TEE bus device enumeration support")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index f3947be..64f0e04 100644 (file)
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -80,7 +80,7 @@ static int optee_register_device(const uuid_t *device_uuid)
        rc = device_register(&optee_device->dev);
        if (rc) {
                pr_err("device registration failed, err: %d\n", rc);
-               kfree(optee_device);
+               put_device(&optee_device->dev);
        }
 
        return rc;