linux-kernel - [PATCH] power: supply: ab8500: Fix memory leak in ab8500_fg_sysfs

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Message-Id: <20220124131346.12571-1-linmq006@gmail.com>
Date:   Mon, 24 Jan 2022 13:13:46 +0000
From:   Miaoqian Lin <linmq006@...il.com>
To:     Sebastian Reichel <sre@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] power: supply: ab8500: Fix memory leak in ab8500_fg_sysfs_init

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()：

   If this function returns an error, kobject_put() must be called to
   properly clean up the memory associated with the object.

Fix memory leak by calling kobject_put().

Fixes: 8c0984e5a753 ("power: move power supply drivers to power/supply")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/power/supply/ab8500_fg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 05fe9724ba50..57799a8079d4 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -2545,8 +2545,10 @@ static int ab8500_fg_sysfs_init(struct ab8500_fg *di)
 	ret = kobject_init_and_add(&di->fg_kobject,
 		&ab8500_fg_ktype,
 		NULL, "battery");
-	if (ret < 0)
+	if (ret < 0) {
+		kobject_put(&di->fg_kobject);
 		dev_err(di->dev, "failed to create sysfs entry\n");
+	}
 
 	return ret;
 }
-- 
2.17.1