linux-kernel - [PATCH 1/2] hfs: abort hfs

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Message-Id: <20250806171132.3402278-2-frank.li@vivo.com>
Date: Wed,  6 Aug 2025 11:11:29 -0600
From: Yangtao Li <frank.li@...o.com>
To: slava@...eyko.com,
	glaubitz@...sik.fu-berlin.de,
	Yangtao Li <frank.li@...o.com>
Cc: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] hfs: abort hfs_lookup if name is too long

Long file names for hfs is 31 characters.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 fs/hfs/dir.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index 86a6b317b474..30f6194da939 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -25,6 +25,9 @@ static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry,
 	struct inode *inode = NULL;
 	int res;
 
+	if (dentry->d_name.len > HFS_NAMELEN)
+		return ERR_PTR(-ENAMETOOLONG);
+
 	res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
 	if (res)
 		return ERR_PTR(res);
-- 
2.48.1