iio: light: hid-sensor-prox: Fix memory leak in probe()

'channels' is allocated via kmemdup and it is never freed.

Use 'indio_dev->channels' directly instead, so that we avoid such
memory leak problem.

Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index 88f21bb..36a2de3 100644 (file)
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -250,7 +250,6 @@ static int hid_prox_probe(struct platform_device *pdev)
        struct iio_dev *indio_dev;
        struct prox_state *prox_state;
        struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
-       struct iio_chan_spec *channels;
 
        indio_dev = devm_iio_device_alloc(&pdev->dev,
                                sizeof(struct prox_state));
@@ -269,20 +268,21 @@ static int hid_prox_probe(struct platform_device *pdev)
                return ret;
        }
 
-       channels = kmemdup(prox_channels, sizeof(prox_channels), GFP_KERNEL);
-       if (!channels) {
+       indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
+                                     GFP_KERNEL);
+       if (!indio_dev->channels) {
                dev_err(&pdev->dev, "failed to duplicate channels\n");
                return -ENOMEM;
        }
 
-       ret = prox_parse_report(pdev, hsdev, channels,
+       ret = prox_parse_report(pdev, hsdev,
+                               (struct iio_chan_spec *)indio_dev->channels,
                                HID_USAGE_SENSOR_PROX, prox_state);
        if (ret) {
                dev_err(&pdev->dev, "failed to setup attributes\n");
                goto error_free_dev_mem;
        }
 
-       indio_dev->channels = channels;
        indio_dev->num_channels =
                                ARRAY_SIZE(prox_channels);
        indio_dev->dev.parent = &pdev->dev;