[PATCH 1/2] wifi: mt76: mt7925: fix a potential array-index-out-of-bounds issue for clc

[Mingyen Hsieh]

From: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>

Due to the lack of checks on the clc array, if the firmware supports
more clc configuration, it will cause illegal memory access.

Cc: stable at vger.kernel.org
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 9dc22fbe25d3..c6c380571fd8 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -638,6 +638,9 @@ 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))
+			break;
+
 		/* do not init buf again if chip reset triggered */
 		if (phy->clc[clc->idx])
 			continue;
-- 
2.18.0