Commit 1c795ebd authored by Alexey Khoroshilov's avatar Alexey Khoroshilov Committed by Jonathan Cameron

iio/adjd_s311: Fix potential memory leak in adjd_s311_update_scan_mode()

Do not leak memory by updating pointer with potentially NULL realloc return value.
There is no need to preserve data in the buffer,
so replace krealloc() by kfree()-kmalloc() pair.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: default avatarAlexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: default avatarPeter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 8857df3a
......@@ -271,9 +271,10 @@ static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
const unsigned long *scan_mask)
{
struct adjd_s311_data *data = iio_priv(indio_dev);
data->buffer = krealloc(data->buffer, indio_dev->scan_bytes,
GFP_KERNEL);
if (!data->buffer)
kfree(data->buffer);
data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data->buffer == NULL)
return -ENOMEM;
return 0;
......
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