On 13/05/15 20:03, Srinivas Pandruvada wrote:
> 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>
Applied to the togreg branch of iio.git - initially pushed out as testing.
Thanks.
>> ---
>> 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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