linux-kernel - [PATCH next] wifi: mt76: mt7925: fix off by one in mt7925_load

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Message-ID: <84bf5dd2-2fe3-4410-a7af-ae841e41082a@stanley.mountain>
Date: Wed, 11 Sep 2024 10:43:03 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Ming Yen Hsieh <mingyen.hsieh@...iatek.com>
Cc: Felix Fietkau <nbd@....name>, Lorenzo Bianconi <lorenzo@...nel.org>,
	Ryder Lee <ryder.lee@...iatek.com>,
	Shayne Chen <shayne.chen@...iatek.com>,
	Sean Wang <sean.wang@...iatek.com>, Kalle Valo <kvalo@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Deren Wu <deren.wu@...iatek.com>, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, kernel-janitors@...r.kernel.org
Subject: [PATCH next] wifi: mt76: mt7925: fix off by one in mt7925_load_clc()

This comparison should be >= instead of > to prevent an out of bounds
read and write.

Fixes: 9679ca7326e5 ("wifi: mt76: mt7925: fix a potential array-index-out-of-bounds issue for clc")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 748ea6adbc6b..0c2a2337c313 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -638,7 +638,7 @@ static int mt7925_load_clc(struct mt792x_dev *dev, const char *fw_name)
 	for (offset = 0; offset < len; offset += le32_to_cpu(clc->len)) {
 		clc = (const struct mt7925_clc *)(clc_base + offset);
 
-		if (clc->idx > ARRAY_SIZE(phy->clc))
+		if (clc->idx >= ARRAY_SIZE(phy->clc))
 			break;
 
 		/* do not init buf again if chip reset triggered */
-- 
2.45.2