linux-kernel - [PATCH] clk: ux500: fix a possible off-by-one in u8500_prcc_reset

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Message-Id: <20220518062537.17933-1-hbh25y@gmail.com>
Date:   Wed, 18 May 2022 14:25:37 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     ulf.hansson@...aro.org, mturquette@...libre.com, sboyd@...nel.org,
        linus.walleij@...aro.org
Cc:     linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] clk: ux500: fix a possible off-by-one in u8500_prcc_reset_base()

Off-by-one will happen when index == ARRAY_SIZE(ur->base).

Fixes: b14cbdfd467d ("clk: ux500: Add driver for the reset portions of PRCC")
Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 drivers/clk/ux500/reset-prcc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/ux500/reset-prcc.c b/drivers/clk/ux500/reset-prcc.c
index fcd5d042806a..f7e48941fbc7 100644
--- a/drivers/clk/ux500/reset-prcc.c
+++ b/drivers/clk/ux500/reset-prcc.c
@@ -58,7 +58,7 @@ static void __iomem *u8500_prcc_reset_base(struct u8500_prcc_reset *ur,
 	prcc_num = id / PRCC_PERIPHS_PER_CLUSTER;
 	index = prcc_num_to_index(prcc_num);
 
-	if (index > ARRAY_SIZE(ur->base))
+	if (index >= ARRAY_SIZE(ur->base))
 		return NULL;
 
 	return ur->base[index];
-- 
2.25.1