linux-kernel - [PATCH] ns2: Fix off by one bugs in ns2_pinmux

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Message-ID: <20190926081426.GB2332@mwanda>
Date:   Thu, 26 Sep 2019 11:14:26 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Ray Jui <rjui@...adcom.com>,
        Yendapally Reddy Dhananjaya Reddy 
        <yendapally.reddy@...adcom.com>
Cc:     Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] ns2: Fix off by one bugs in ns2_pinmux_enable()

The pinctrl->functions[] array has pinctrl->num_functions elements and
the pinctrl->groups[] array is the same way.  These are set in
ns2_pinmux_probe().  So the > comparisons should be >= so that we don't
read one element beyond the end of the array.

Fixes: b5aa1006e4a9 ("pinctrl: ns2: add pinmux driver support for Broadcom NS2 SoC")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/pinctrl/bcm/pinctrl-ns2-mux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-ns2-mux.c b/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
index 2bf6af7df7d9..9fabc451550e 100644
--- a/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
+++ b/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
@@ -640,8 +640,8 @@ static int ns2_pinmux_enable(struct pinctrl_dev *pctrl_dev,
 	const struct ns2_pin_function *func;
 	const struct ns2_pin_group *grp;
 
-	if (grp_select > pinctrl->num_groups ||
-		func_select > pinctrl->num_functions)
+	if (grp_select >= pinctrl->num_groups ||
+		func_select >= pinctrl->num_functions)
 		return -EINVAL;
 
 	func = &pinctrl->functions[func_select];
-- 
2.20.1