5.15-stable review patch. If anyone has any objections, please let me know.
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From: Lizhi Xu lizhi.xu@windriver.com
[ 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 --- fs/ntfs3/dir.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c index a4ab0164d150..c49e64ebbd0a 100644 --- a/fs/ntfs3/dir.c +++ b/fs/ntfs3/dir.c @@ -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) {