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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dan Robertson <dan@dlrobertson.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Linus Walleij <linus.walleij@linaro.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	linux-iio@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] iio: accel: bma400: integer underflow setting accel scale
Date: Wed, 15 Jan 2020 20:45:31 +0300
Message-ID: <20200115174531.p623ukjibn6kg6zz@kili.mountain> (raw)

We put an upper bound on "val2" but we also need to prevent negative
values.

Fixes: 465c811f1f20 ("iio: accel: Add driver for the BMA400")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/iio/accel/bma400_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
index ab4a158b35af..ffc7b146bbfc 100644
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@@ -752,7 +752,7 @@ static int bma400_write_raw(struct iio_dev *indio_dev,
 		mutex_unlock(&data->mutex);
 		return ret;
 	case IIO_CHAN_INFO_SCALE:
-		if (val != 0 || val2 > BMA400_SCALE_MAX)
+		if (val != 0 || val2 < 0 || val2 > BMA400_SCALE_MAX)
 			return -EINVAL;
 
 		mutex_lock(&data->mutex);
-- 
2.11.0


             reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15 17:45 Dan Carpenter [this message]
2020-01-15 17:43 ` Dan Robertson
2020-01-15 18:09   ` Dan Carpenter
2020-01-15 17:58     ` Dan Robertson
2020-01-15 18:17 ` Dan Robertson
2020-01-16  6:24   ` Dan Carpenter
2020-01-16 10:08   ` [PATCH v2] iio: accel: bma400: prevent setting accel scale too low Dan Carpenter
2020-01-18 13:34     ` Jonathan Cameron

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