[PATCH 5.14 469/849] mt76: mt7615: fix hwmon temp sensor mem use-after-free

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From: Ryder Lee <ryder.lee@xxxxxxxxxxxx>

[ Upstream commit 0bb4e9187ea4a59dc6658a62978deda0c0dc4b28 ]

Without this change, garbage is seen in the hwmon name and sensors output
for mt7615 is garbled.

Fixes: 109e505ad944 ("mt76: mt7615: add thermal sensor device support")
Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt7615/init.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
index 2f1ac644e018e..47f23ac905a3c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
@@ -49,12 +49,14 @@ int mt7615_thermal_init(struct mt7615_dev *dev)
 {
 	struct wiphy *wiphy = mt76_hw(dev)->wiphy;
 	struct device *hwmon;
+	const char *name;
 
 	if (!IS_REACHABLE(CONFIG_HWMON))
 		return 0;
 
-	hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev,
-						       wiphy_name(wiphy), dev,
+	name = devm_kasprintf(&wiphy->dev, GFP_KERNEL, "mt7615_%s",
+			      wiphy_name(wiphy));
+	hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev, name, dev,
 						       mt7615_hwmon_groups);
 	if (IS_ERR(hwmon))
 		return PTR_ERR(hwmon);
-- 
2.33.0






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