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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>, Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-f2fs-devel@lists.sourceforge.net
Subject: [f2fs-dev] [PATCH AUTOSEL 5.4 351/459] f2fs: fix memleak of kobject
Date: Fri, 14 Feb 2020 11:00:01 -0500
Message-ID: <20200214160149.11681-351-sashal@kernel.org> (raw)
In-Reply-To: <20200214160149.11681-1-sashal@kernel.org>

From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit fe396ad8e7526f059f7b8c7290d33a1b84adacab ]

If kobject_init_and_add() failed, caller needs to invoke kobject_put()
to release kobject explicitly.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/sysfs.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 8544c0ab7b32b..170934430d7d7 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -729,10 +729,12 @@ int __init f2fs_init_sysfs(void)
 
 	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 				   NULL, "features");
-	if (ret)
+	if (ret) {
+		kobject_put(&f2fs_feat);
 		kset_unregister(&f2fs_kset);
-	else
+	} else {
 		f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
+	}
 	return ret;
 }
 
@@ -753,8 +755,11 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 	init_completion(&sbi->s_kobj_unregister);
 	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 				"%s", sb->s_id);
-	if (err)
+	if (err) {
+		kobject_put(&sbi->s_kobj);
+		wait_for_completion(&sbi->s_kobj_unregister);
 		return err;
+	}
 
 	if (f2fs_proc_root)
 		sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
-- 
2.20.1



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Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200214160149.11681-1-sashal@kernel.org>
2020-02-14 15:54 ` [f2fs-dev] [PATCH AUTOSEL 5.4 011/459] f2fs: preallocate DIO blocks when forcing buffered_io Sasha Levin
2020-02-14 15:54 ` [f2fs-dev] [PATCH AUTOSEL 5.4 012/459] f2fs: call f2fs_balance_fs outside of locked page Sasha Levin
2020-02-14 15:59 ` [f2fs-dev] [PATCH AUTOSEL 5.4 325/459] f2fs: set I_LINKABLE early to avoid wrong access by vfs Sasha Levin
2020-02-14 15:59 ` [f2fs-dev] [PATCH AUTOSEL 5.4 326/459] f2fs: free sysfs kobject Sasha Levin
2020-02-14 16:00 ` Sasha Levin [this message]

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