linux-kernel - [PATCH 14/20] phy: exynos5-usbdrd: Fix off-by-one valid value checking for args->args[0]

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Date:	Fri, 13 Mar 2015 17:31:51 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	<gregkh@...uxfoundation.org>
CC:	<kishon@...com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 14/20] phy: exynos5-usbdrd: Fix off-by-one valid value checking for args->args[0]

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

Current code uses args->args[0] as array subscript of phy_drd->phys[].
So the valid value range for args->args[0] is 0 ... EXYNOS5_DRDPHYS_NUM - 1.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
Reviewed by: Vivek Gautam <gautam.vivek@...sung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/phy/phy-exynos5-usbdrd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c
index 0437401..e2a0be7 100644
--- a/drivers/phy/phy-exynos5-usbdrd.c
+++ b/drivers/phy/phy-exynos5-usbdrd.c
@@ -531,7 +531,7 @@ static struct phy *exynos5_usbdrd_phy_xlate(struct device *dev,
 {
 	struct exynos5_usbdrd_phy *phy_drd = dev_get_drvdata(dev);
 
-	if (WARN_ON(args->args[0] > EXYNOS5_DRDPHYS_NUM))
+	if (WARN_ON(args->args[0] >= EXYNOS5_DRDPHYS_NUM))
 		return ERR_PTR(-ENODEV);
 
 	return phy_drd->phys[args->args[0]].phy;
-- 
1.7.9.5

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