linux-kernel - [PATCH 3.19.y-ckt 123/156] clk: versatile: off by one in clk_sp810_timerclken_of

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Message-Id: <1445377097-9921-124-git-send-email-kamal@canonical.com>
Date:	Tue, 20 Oct 2015 14:37:44 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 123/156] clk: versatile: off by one in clk_sp810_timerclken_of_get()

3.19.8-ckt8 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 3294bee87091be5f179474f6c39d1d87769635e2 upstream.

The ">" should be ">=" or we end up reading beyond the end of the array.

Fixes: 6e973d2c4385 ('clk: vexpress: Add separate SP810 driver')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Pawel Moll <pawel.moll@....com>
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/clk/versatile/clk-sp810.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/versatile/clk-sp810.c b/drivers/clk/versatile/clk-sp810.c
index c6e86a9..5122ef2 100644
--- a/drivers/clk/versatile/clk-sp810.c
+++ b/drivers/clk/versatile/clk-sp810.c
@@ -128,8 +128,8 @@ static struct clk *clk_sp810_timerclken_of_get(struct of_phandle_args *clkspec,
 {
 	struct clk_sp810 *sp810 = data;
 
-	if (WARN_ON(clkspec->args_count != 1 || clkspec->args[0] >
-			ARRAY_SIZE(sp810->timerclken)))
+	if (WARN_ON(clkspec->args_count != 1 ||
+		    clkspec->args[0] >=	ARRAY_SIZE(sp810->timerclken)))
 		return NULL;
 
 	return sp810->timerclken[clkspec->args[0]].clk;
-- 
1.9.1

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