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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Axel Lin <axel.lin@ingics.com>,
        Mark Brown <broonie@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 079/271] regulator: pv88080: Fix array out-of-bounds access
Date:   Tue, 28 Jan 2020 15:03:48 +0100
Message-Id: <20200128135858.436677287@linuxfoundation.org>
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From: Axel Lin <axel.lin@ingics.com>

[ Upstream commit 3c413f594c4f9df40061445667ca11a12bc8ee34 ]

Fix off-by-one while iterating current_limits array.
The valid index should be 0 ~ n_current_limits -1.

Fixes: 99cf3af5e2d5 ("regulator: pv88080: new regulator driver")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/regulator/pv88080-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/pv88080-regulator.c b/drivers/regulator/pv88080-regulator.c
index 954a20eeb26f8..a40ecfb772107 100644
--- a/drivers/regulator/pv88080-regulator.c
+++ b/drivers/regulator/pv88080-regulator.c
@@ -279,7 +279,7 @@ static int pv88080_set_current_limit(struct regulator_dev *rdev, int min,
 	int i;
 
 	/* search for closest to maximum */
-	for (i = info->n_current_limits; i >= 0; i--) {
+	for (i = info->n_current_limits - 1; i >= 0; i--) {
 		if (min <= info->current_limits[i]
 			&& max >= info->current_limits[i]) {
 				return regmap_update_bits(rdev->regmap,
-- 
2.20.1