linux-hardening - [PATCH 09/19] zonefs: remove duplicate cleanup in zonefs_fill

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Date:   Wed, 13 Sep 2023 08:10:03 -0300
From:   Christoph Hellwig <hch@....de>
To:     Christian Brauner <brauner@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>
Cc:     Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Tejun Heo <tj@...nel.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Damien Le Moal <dlemoal@...nel.org>,
        Naohiro Aota <naohiro.aota@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-nfs@...r.kernel.org, linux-hardening@...r.kernel.org,
        cgroups@...r.kernel.org
Subject: [PATCH 09/19] zonefs: remove duplicate cleanup in zonefs_fill_super

When ->fill_super fails, ->kill_sb is called which already cleans up
the inodes and zgroups.

Drop the extra cleanup code in zonefs_fill_super.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 fs/zonefs/super.c | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 9d1a9808fbbba6..35b2554ce2ac2e 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -1309,13 +1309,12 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
 	/* Initialize the zone groups */
 	ret = zonefs_init_zgroups(sb);
 	if (ret)
-		goto cleanup;
+		return ret;
 
 	/* Create the root directory inode */
-	ret = -ENOMEM;
 	inode = new_inode(sb);
 	if (!inode)
-		goto cleanup;
+		return -ENOMEM;
 
 	inode->i_ino = bdev_nr_zones(sb->s_bdev);
 	inode->i_mode = S_IFDIR | 0555;
@@ -1333,7 +1332,7 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
 
 	sb->s_root = d_make_root(inode);
 	if (!sb->s_root)
-		goto cleanup;
+		return -ENOMEM;
 
 	/*
 	 * Take a reference on the zone groups directory inodes
@@ -1341,19 +1340,9 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
 	 */
 	ret = zonefs_get_zgroup_inodes(sb);
 	if (ret)
-		goto cleanup;
-
-	ret = zonefs_sysfs_register(sb);
-	if (ret)
-		goto cleanup;
-
-	return 0;
-
-cleanup:
-	zonefs_release_zgroup_inodes(sb);
-	zonefs_free_zgroups(sb);
+		return ret;
 
-	return ret;
+	return zonefs_sysfs_register(sb);
 }
 
 static struct dentry *zonefs_mount(struct file_system_type *fs_type,
-- 
2.39.2