linux-kernel - [PATCH] nilfs2: fix memory leak in nilfs_sysfs_create_device

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Message-Id: <20210906041330.2065214-1-mudongliangabcd@gmail.com>
Date:   Mon,  6 Sep 2021 12:13:30 +0800
From:   Dongliang Mu <mudongliangabcd@...il.com>
To:     Ryusuke Konishi <konishi.ryusuke@...il.com>
Cc:     paskripkin@...il.com, Dongliang Mu <mudongliangabcd@...il.com>,
        linux-nilfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] nilfs2: fix memory leak in nilfs_sysfs_create_device_group

The commit 8fd0c1b0647a ("nilfs2: fix memory leak in
nilfs_sysfs_delete_device_group") adds a kobject_put to free the leaking
object name. However, it is incomplete to only add kobject_put in the
nilfs_sysfs_delete_device_group. The function
nilfs_sysfs_create_device_group also needs the kobject_put to
free the object name in the error handling part.

Fix this by adding kobject_put in the error handling code of
nilfs_sysfs_create_device_group.

Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
 fs/nilfs2/sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c
index 68e8d61e28dd..7ab60711ca76 100644
--- a/fs/nilfs2/sysfs.c
+++ b/fs/nilfs2/sysfs.c
@@ -1024,6 +1024,7 @@ int nilfs_sysfs_create_device_group(struct super_block *sb)

 cleanup_dev_kobject:
 	kobject_del(&nilfs->ns_dev_kobj);
+	kobject_put(&nilfs->ns_dev_kobj);

 free_dev_subgroups:
 	kfree(nilfs->ns_dev_subgroups);
-- 
2.25.1