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

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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: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alexey Khoroshilov 2012-08-08 10:58:00 +01:00 committed by Jonathan Cameron
parent 8857df3ace
commit 1c795ebd00
1 changed files with 4 additions and 3 deletions
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7
drivers/iio/light/adjd_s311.c
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@ -271,9 +271,10 @@ static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
const unsigned long *scan_mask) const unsigned long *scan_mask)
{ {
struct adjd_s311_data *data = iio_priv(indio_dev); struct adjd_s311_data *data = iio_priv(indio_dev);
data->buffer = krealloc(data->buffer, indio_dev->scan_bytes,
GFP_KERNEL); kfree(data->buffer);
if (!data->buffer) data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data->buffer == NULL)
return -ENOMEM; return -ENOMEM;
return 0; return 0;