linux-kernel - [PATCH v2 1/3] hfs: add missing clean-up in hfs_fill

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Date:   Thu,  1 Jul 2021 11:07:54 +0800
From:   Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>
To:     gustavoars@...nel.org, viro@...iv.linux.org.uk
Cc:     Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        slava@...eyko.com, skhan@...uxfoundation.org,
        gregkh@...uxfoundation.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH v2 1/3] hfs: add missing clean-up in hfs_fill_super

Before exiting hfs_fill_super, the struct hfs_find_data used in
hfs_find_init should be passed to hfs_find_exit to be cleaned up, and
to release the lock held on the btree.

The call to hfs_find_exit is missing from an error path. We add it
back in by consolidating calls to hfs_find_exit for error paths.

Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@...il.com>
---
 fs/hfs/super.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 44d07c9e3a7f..12d9bae39363 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -420,14 +420,12 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
 	if (!res) {
 		if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
 			res =  -EIO;
-			goto bail;
+			goto bail_hfs_find;
 		}
 		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
 	}
-	if (res) {
-		hfs_find_exit(&fd);
-		goto bail_no_root;
-	}
+	if (res)
+		goto bail_hfs_find;
 	res = -EINVAL;
 	root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
 	hfs_find_exit(&fd);
@@ -443,6 +441,8 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
 	/* everything's okay */
 	return 0;
 
+bail_hfs_find:
+	hfs_find_exit(&fd);
 bail_no_root:
 	pr_err("get root inode failed\n");
 bail:
-- 
2.25.1