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>
---
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;
--
1.9.1
--
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