[PATCH 6.1 103/197] iio: core: fix memleak in iio_device_register_sysfs

Greg Kroah-Hartman
2024-02-20T21:04:45Z

From: Dinghao Liu <dinghao.liu@zju.edu.cn>

commit 95a0d596bbd0552a78e13ced43f2be1038883c81 upstream.

When iio_device_register_sysfs_group() fails, we should
free iio_dev_opaque->chan_attr_group.attrs to prevent
potential memleak.

Fixes: 32f171724e5c ("iio: core: rework iio device group creation")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20231208073119.29283-1-dinghao.liu@zju.edu.cn
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/iio/industrialio-core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1601,10 +1601,13 @@ static int iio_device_register_sysfs(str
ret = iio_device_register_sysfs_group(indio_dev,
&iio_dev_opaque->chan_attr_group);
if (ret)
- goto error_clear_attrs;
+ goto error_free_chan_attrs;

return 0;

+error_free_chan_attrs:
+ kfree(iio_dev_opaque->chan_attr_group.attrs);
+ iio_dev_opaque->chan_attr_group.attrs = NULL;
error_clear_attrs:
iio_free_chan_devattr_list(&iio_dev_opaque->channel_attr_list);