linux-kernel - [patch] iio: tsl2583: make array large enough

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Message-ID: <20161124133807.GA32255@mwanda>
Date:   Thu, 24 Nov 2016 16:38:07 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Brian Masney <masneyb@...tation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eva Rachel Retuya <eraretuya@...il.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [patch] iio: tsl2583: make array large enough

This array is supposed to have 10 elements.  Smatch complains that with
the current code we can have n == max_ints and read beyond the end of
the array.

Fixes: ac4f6eee8fe8 ("staging: iio: TAOS tsl258x: Device driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c
index 0b87f6a..a78b602 100644
--- a/drivers/iio/light/tsl2583.c
+++ b/drivers/iio/light/tsl2583.c
@@ -565,7 +565,7 @@ static ssize_t in_illuminance_lux_table_store(struct device *dev,
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct tsl2583_chip *chip = iio_priv(indio_dev);
 	const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
-	int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3];
+	int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3 + 1];
 	int ret = -EINVAL;
 	unsigned int n;