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

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@oracle.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


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-26  8:14 Dan Carpenter [this message]
2019-10-02 20:06 ` Scott Branden
2019-10-04 22:14 ` Linus Walleij

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