linux-kernel - [PATCH 6.6 575/638] thermal/drivers/mediatek/lvts_thermal: Fix a memory leak in an error handling path

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Date: Sun, 24 Mar 2024 19:00:12 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.6 575/638] thermal/drivers/mediatek/lvts_thermal: Fix a memory leak in an error handling path

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit ca93bf607a44c1f009283dac4af7df0d9ae5e357 ]

If devm_krealloc() fails, then 'efuse' is leaking.
So free it to avoid a leak.

Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/481d345233862d58c3c305855a93d0dbc2bbae7e.1706431063.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/thermal/mediatek/lvts_thermal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index effd9b00a424b..a4e56017dda3f 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -679,8 +679,10 @@ static int lvts_calibration_read(struct device *dev, struct lvts_domain *lvts_td
 
 		lvts_td->calib = devm_krealloc(dev, lvts_td->calib,
 					       lvts_td->calib_len + len, GFP_KERNEL);
-		if (!lvts_td->calib)
+		if (!lvts_td->calib) {
+			kfree(efuse);
 			return -ENOMEM;
+		}
 
 		memcpy(lvts_td->calib + lvts_td->calib_len, efuse, len);
 
-- 
2.43.0