From 1918c10e137eae266b8eb0ab1cc14421dcb0e3e2 Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Fri, 24 Nov 2023 11:26:31 +0300 Subject: [PATCH] fs/ntfs3: Correct hard links updating when dealing with DOS names Signed-off-by: Konstantin Komarov --- fs/ntfs3/record.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/fs/ntfs3/record.c b/fs/ntfs3/record.c index 53629b1f65e99..7b6423584eaee 100644 --- a/fs/ntfs3/record.c +++ b/fs/ntfs3/record.c @@ -535,8 +535,20 @@ bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi, return false; if (ni && is_attr_indexed(attr)) { - le16_add_cpu(&ni->mi.mrec->hard_links, -1); - ni->mi.dirty = true; + u16 links = le16_to_cpu(ni->mi.mrec->hard_links); + struct ATTR_FILE_NAME *fname = + attr->type != ATTR_NAME ? + NULL : + resident_data_ex(attr, + SIZEOF_ATTRIBUTE_FILENAME); + if (fname && fname->type == FILE_NAME_DOS) { + /* Do not decrease links count deleting DOS name. */ + } else if (!links) { + /* minor error. Not critical. */ + } else { + ni->mi.mrec->hard_links = cpu_to_le16(links - 1); + ni->mi.dirty = true; + } } used -= asize; -- 2.30.2