linux-kernel - [PATCH 5.17 0744/1126] clk: imx: off by one in imx_lpcg_parse_clks_from

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Date:   Tue,  5 Apr 2022 09:24:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Abel Vesa <abel.vesa@....com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 0744/1126] clk: imx: off by one in imx_lpcg_parse_clks_from_dt()

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

[ Upstream commit 135efc3a76d127691afaf1864e4ab627bf09d53d ]

The > needs to be >= to prevent an off by one access.

Fixes: d5f1e6a2bb61 ("clk: imx: imx8qxp-lpcg: add parsing clocks from device tree")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Abel Vesa <abel.vesa@....com>
Link: https://lore.kernel.org/r/20220228075014.GD13685@kili
Signed-off-by: Abel Vesa <abel.vesa@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/imx/clk-imx8qxp-lpcg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c
index b23758083ce5..5e31a6a24b3a 100644
--- a/drivers/clk/imx/clk-imx8qxp-lpcg.c
+++ b/drivers/clk/imx/clk-imx8qxp-lpcg.c
@@ -248,7 +248,7 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
 
 	for (i = 0; i < count; i++) {
 		idx = bit_offset[i] / 4;
-		if (idx > IMX_LPCG_MAX_CLKS) {
+		if (idx >= IMX_LPCG_MAX_CLKS) {
 			dev_warn(&pdev->dev, "invalid bit offset of clock %d\n",
 				 i);
 			ret = -EINVAL;
-- 
2.34.1