linux-kernel - [PATCH 4.9 078/271] regulator: pv88060: Fix array out-of-bounds access

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Message-Id: <20200128135858.363147358@linuxfoundation.org>
Date:   Tue, 28 Jan 2020 15:03:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Axel Lin <axel.lin@...ics.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 078/271] regulator: pv88060: Fix array out-of-bounds access

From: Axel Lin <axel.lin@...ics.com>

[ Upstream commit 7cd415f875591bc66c5ecb49bf84ef97e80d7b0e ]

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

Fixes: f307a7e9b7af ("regulator: pv88060: 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/pv88060-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/pv88060-regulator.c b/drivers/regulator/pv88060-regulator.c
index 6c4afc73ecac3..d229245d2b5e8 100644
--- a/drivers/regulator/pv88060-regulator.c
+++ b/drivers/regulator/pv88060-regulator.c
@@ -135,7 +135,7 @@ static int pv88060_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