linux-kernel - [PATCH v2] thermal/core: avoid memory leak

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Message-ID: <20210322191830.GA2123877@LEGION>
Date:   Tue, 23 Mar 2021 00:18:30 +0500
From:   Muhammad Usama Anjum <musamaanjum@...il.com>
To:     Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>
Cc:     musamaanjum@...il.com, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, kernel-janitors@...r.kernel.org,
        colin.king@...onical.com, dan.carpenter@...cle.com
Subject: [PATCH v2] thermal/core: avoid memory leak

When memory allocation for cdev is successful but ida_simple_get fails,
branch to out_kfree_cdev label happens and cdev isn't freed. There are
also some other cases in which the memory can leak. Fix it by freeing cdev.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@...il.com>
---
Fix description

 drivers/thermal/thermal_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index c8d4010940ef..3566fd291399 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1017,6 +1017,7 @@ __thermal_cooling_device_register(struct device_node *np,
 out_ida_remove:
 	ida_simple_remove(&thermal_cdev_ida, cdev->id);
 out_kfree_cdev:
+	kfree(cdev);
 	return ERR_PTR(ret);
 }
 
-- 
2.25.1