linux-kernel - [PATCH 5/6] nilfs2: fix memory leak in nilfs_sysfs_create_snapshot

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Message-ID: <20210629022556.3985106-6-sunnanyong@huawei.com>
Date:   Tue, 29 Jun 2021 10:25:55 +0800
From:   Nanyong Sun <sunnanyong@...wei.com>
To:     <konishi.ryusuke@...il.com>
CC:     <linux-nilfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sunnanyong@...wei.com>, <wangkefeng.wang@...wei.com>
Subject: [PATCH 5/6] nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group

If kobject_init_and_add returns with error, kobject_put() is needed
here to avoid memory leak, because kobject_init_and_add may return
error without freeing the memory associated with the kobject it allocated.

Signed-off-by: Nanyong Sun <sunnanyong@...wei.com>
---
 fs/nilfs2/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c
index d989e6500bd7..5ba87573ad3b 100644
--- a/fs/nilfs2/sysfs.c
+++ b/fs/nilfs2/sysfs.c
@@ -195,9 +195,9 @@ int nilfs_sysfs_create_snapshot_group(struct nilfs_root *root)
 	}
 
 	if (err)
-		return err;
+		kobject_put(&root->snapshot_kobj);
 
-	return 0;
+	return err;
 }
 
 void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *root)
-- 
2.18.0.huawei.25