On Wed, 2015-05-13 at 15:06 -0300, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
>
> 'channels' is allocated via kmemdup and it is never freed in the
> subsequent error paths.
>
> Use 'indio_dev->channels' directly instead, so that we avoid such
> memory leak problem.
>
> Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> ---
> Build-tested only.
>
> Changes since v2:
> - None
> Changes since v1:
> - Make clear in the commit log that the proble only occurs in the error
> paths
>
> drivers/iio/orientation/hid-sensor-rotation.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
> index 4afb6c7..b6ee50f 100644
> --- a/drivers/iio/orientation/hid-sensor-rotation.c
> +++ b/drivers/iio/orientation/hid-sensor-rotation.c
> @@ -222,7 +222,6 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
> struct iio_dev *indio_dev;
> struct dev_rot_state *rot_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 dev_rot_state));
> @@ -243,21 +242,23 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
> return ret;
> }
>
> - channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
> - sizeof(dev_rot_channels), GFP_KERNEL);
> - if (!channels) {
> + indio_dev->channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
> + sizeof(dev_rot_channels),
> + GFP_KERNEL);
> + if (!indio_dev->channels) {
> dev_err(&pdev->dev, "failed to duplicate channels\n");
> return -ENOMEM;
> }
>
> - ret = dev_rot_parse_report(pdev, hsdev, channels,
> - HID_USAGE_SENSOR_DEVICE_ORIENTATION, rot_state);
> + ret = dev_rot_parse_report(pdev, hsdev,
> + (struct iio_chan_spec *)indio_dev->channels,
> + HID_USAGE_SENSOR_DEVICE_ORIENTATION,
> + rot_state);
> if (ret) {
> dev_err(&pdev->dev, "failed to setup attributes\n");
> return ret;
> }
>
> - indio_dev->channels = channels;
> indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
> indio_dev->dev.parent = &pdev->dev;
> indio_dev->info = &dev_rot_info;
--
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