linux-kernel - [PATCH] wifi: mt76: mt7996: Add NULL check in mt7996_thermal

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Message-Id: <20250331103543.9154-1-bsdhenrymartin@gmail.com>
Date: Mon, 31 Mar 2025 18:35:43 +0800
From: Henry Martin <bsdhenrymartin@...il.com>
To: nbd@....name,
	lorenzo@...nel.org,
	ryder.lee@...iatek.com
Cc: shayne.chen@...iatek.com,
	sean.wang@...iatek.com,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	howard-yh.hsu@...iatek.com,
	StanleyYP.Wang@...iatek.com,
	chui-hao.chiu@...iatek.com,
	linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Henry Martin <bsdhenrymartin@...il.com>
Subject: [PATCH] wifi: mt76: mt7996: Add NULL check in mt7996_thermal_init

When devm_kasprintf() fails, it returns a NULL pointer. However, this return value is not properly checked in the function mt7996_thermal_init.

A NULL check should be added after the devm_kasprintf() to prevent potential NULL pointer dereference error.

Fixes: 69d54ce7491d0 ("switch to single multi-radio wiphy")

Signed-off-by: Henry Martin <bsdhenrymartin@...il.com>
---
 drivers/net/wireless/mediatek/mt76/mt7996/init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/init.c b/drivers/net/wireless/mediatek/mt76/mt7996/init.c
index 6b660424aedc..702447022f0e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/init.c
@@ -217,6 +217,8 @@ static int mt7996_thermal_init(struct mt7996_phy *phy)
 
 	name = devm_kasprintf(&wiphy->dev, GFP_KERNEL, "mt7996_%s.%d",
 			      wiphy_name(wiphy), phy->mt76->band_idx);
+	if (!name)
+		return -ENOMEM;
 	snprintf(cname, sizeof(cname), "cooling_device%d", phy->mt76->band_idx);
 
 	cdev = thermal_cooling_device_register(name, phy, &mt7996_thermal_ops);
-- 
2.34.1