linux-kernel - [PATCH AUTOSEL 4.9 077/251] regulator: pv88080: Fix array out-of-bounds access

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Message-Id: <20200116173641.22137-37-sashal@kernel.org>
Date:   Thu, 16 Jan 2020 12:33:46 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Axel Lin <axel.lin@...ics.com>, Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.9 077/251] regulator: pv88080: Fix array out-of-bounds access

From: Axel Lin <axel.lin@...ics.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@...ics.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.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 954a20eeb26f..a40ecfb77210 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