linux-kernel - [PATCH V1] regulator: pv88090: Exception handling for out of bounds

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Date:   Wed, 30 Aug 2017 17:54:27 +0900
From:   Eric Jeong <eric.jeong.opensource@...semi.com>
To:     LINUXKERNEL <linux-kernel@...r.kernel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
CC:     Support Opensource <support.opensource@...semi.com>
Subject: [PATCH V1] regulator: pv88090: Exception handling for out of bounds


From: Eric Jeong <eric.jeong.opensource@...semi.com>

This is a patch for exception handlding that the index of array is
out of bounds. And the definitions have been updated to use
proper device name.

Signed-off-by: Eric Jeong <eric.jeong.opensource@...semi.com>

---
This patch applies against linux-next and next-20170829 


 drivers/regulator/pv88090-regulator.c |   11 ++++++++---
 drivers/regulator/pv88090-regulator.h |    8 ++++----
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/pv88090-regulator.c b/drivers/regulator/pv88090-regulator.c
index ab51e25..7a0c159 100644
--- a/drivers/regulator/pv88090-regulator.c
+++ b/drivers/regulator/pv88090-regulator.c
@@ -43,7 +43,7 @@ enum {
 struct pv88090_regulator {
 	struct regulator_desc desc;
 	/* Current limiting */
-	unsigned	n_current_limits;
+	unsigned int n_current_limits;
 	const int	*current_limits;
 	unsigned int limit_mask;
 	unsigned int conf;
@@ -398,9 +398,14 @@ static int pv88090_i2c_probe(struct i2c_client *i2c,
 				return ret;
 
 			range = (range >>
-				 (PV88080_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
-				PV88080_BUCK_VRANGE_GAIN_MASK;
+				 (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
+				PV88090_BUCK_VRANGE_GAIN_MASK;
 			index = ((range << 1) | conf2);
+			if (index > PV88090_ID_BUCK3) {
+				dev_err(chip->dev,
+					"Invalid index(%d)\n", index);
+				return -EINVAL;
+			}
 
 			pv88090_regulator_info[i].desc.min_uV
 				= pv88090_buck_vol[index].min_uV;
diff --git a/drivers/regulator/pv88090-regulator.h b/drivers/regulator/pv88090-regulator.h
index d7aca8d..62d9029 100644
--- a/drivers/regulator/pv88090-regulator.h
+++ b/drivers/regulator/pv88090-regulator.h
@@ -89,10 +89,10 @@
 #define PV88090_BUCK_VDAC_RANGE_2			0x01
 
 /* PV88090_REG_BUCK_FOLD_RANGE (addr=0x61) */
-#define PV88080_BUCK_VRANGE_GAIN_SHIFT			3
-#define PV88080_BUCK_VRANGE_GAIN_MASK			0x01
+#define PV88090_BUCK_VRANGE_GAIN_SHIFT			3
+#define PV88090_BUCK_VRANGE_GAIN_MASK			0x01
 
-#define PV88080_BUCK_VRANGE_GAIN_1			0x00
-#define PV88080_BUCK_VRANGE_GAIN_2			0x01
+#define PV88090_BUCK_VRANGE_GAIN_1			0x00
+#define PV88090_BUCK_VRANGE_GAIN_2			0x01
 
 #endif	/* __PV88090_REGISTERS_H__ */
-- 
end-of-patch for PATCH V1