From: Colin Ian King <[email protected]> The comparison for devnr limits is off-by-one, the current check allows 0 to AD5755_NUM_CHANNELS and the limit should be in fact 0 to AD5755_NUM_CHANNELS - 1. This can lead to an out of bounds write to pdata->dac[devnr]. Fix this by replacing > with >= on the comparison.
Signed-off-by: Colin Ian King <[email protected]> --- drivers/iio/dac/ad5755.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c index 0fde593..5f79682 100644 --- a/drivers/iio/dac/ad5755.c +++ b/drivers/iio/dac/ad5755.c @@ -655,7 +655,7 @@ static struct ad5755_platform_data *ad5755_parse_dt(struct device *dev) devnr = 0; for_each_child_of_node(np, pp) { - if (devnr > AD5755_NUM_CHANNELS) { + if (devnr >= AD5755_NUM_CHANNELS) { dev_err(dev, "There is to many channels defined in DT\n"); goto error_out; -- 2.8.1
