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fs/ntfs3: Add sanity check for file name

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[ Upstream commit e841ecb139339602bc1853f5f09daa5d1ea920a2 ]

The length of the file name should be smaller than the directory entry size.

Reported-by: syzbot+598057afa0f49e62bd23@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=598057afa0f49e62bd23
Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lizhi Xu
2025-06-06 13:16:16 +08:00
committed by Greg Kroah-Hartman
parent 934065fd30
commit 3572737a76
1 changed files with 3 additions and 0 deletions
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3
fs/ntfs3/dir.c
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@@ -304,6 +304,9 @@ static inline bool ntfs_dir_emit(struct ntfs_sb_info *sbi,
if (sbi->options->nohidden && (fname->dup.fa & FILE_ATTRIBUTE_HIDDEN))
return true;
if (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size))
return true;
name_len = ntfs_utf16_to_nls(sbi, fname->name, fname->name_len, name,
PATH_MAX);
if (name_len <= 0) {