From 0bb4e9187ea4a59dc6658a62978deda0c0dc4b28 Mon Sep 17 00:00:00 2001
From: Ryder Lee <ryder.lee@mediatek.com>
Date: Thu, 2 Sep 2021 13:52:04 +0800
Subject: [PATCH] mt76: mt7615: fix hwmon temp sensor mem use-after-free
Git-commit: 0bb4e9187ea4a59dc6658a62978deda0c0dc4b28
Patch-mainline: v5.16-rc1
References: git-fixes stable-5.14.19
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@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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 2f1ac644e018..47f23ac905a3 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);
--
2.26.2