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

[You-Sheng Yang]

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

BugLink: https://bugs.launchpad.net/bugs/2081785

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>
Link: https://patch.msgid.link/20240819015334.14580-1-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd at nbd.name>
(cherry picked from commit 9679ca7326e52282cc923c4d71d81c999cb6cd55)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.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 e1dd89a7a79ca..bb171ba8177b1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -613,6 +613,9 @@ 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;
-- 
2.45.2