linux-kernel - [PATCH V2 1/2] thermal/core: fix potential memory leak

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Message-Id: <20230724071646.2744900-2-peng.fan@oss.nxp.com>
Date:   Mon, 24 Jul 2023 15:16:45 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     rafael@...nel.org, daniel.lezcano@...aro.org
Cc:     amitk@...nel.org, rui.zhang@...el.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V2 1/2] thermal/core: fix potential memory leak

From: Peng Fan <peng.fan@....com>

thermal_set_governor will allocate memory for tz->governor_data by
calling power_allocator_bind, so need free it in failure handling path.

Addresses-Coverity: 25777220 ("Memory leak")
Fixes: e33df1d2f3a0 ("thermal: let governors have private data for each thermal zone")
Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/thermal/thermal_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index cc2b5e81c620..fe5eef149695 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1355,6 +1355,9 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
 	return tz;
 
 unregister:
+	if (tz->governor && tz->governor->unbind_from_tz)
+		tz->governor->unbind_from_tz(tz);
+
 	device_del(&tz->device);
 release_device:
 	put_device(&tz->device);
-- 
2.37.1