From de08874bae7db49d77085a34b62ebb491ea68e2e Mon Sep 17 00:00:00 2001 From: Hyunchul Lee Date: Mon, 4 May 2026 20:03:14 +0900 Subject: [PATCH] ntfs: match ntfs_resident_attr_min_value_length with $AttrDef Update ntfs_resident_attr_min_value_length() to align with $AttrDef. The $VOLUME_NAME is allowed to have the size of 0. The Windows 11 $AttrDef values are as follows: Attribute Name (ID) Size (Min-Max) Flags $STANDARD_INFORMATION (16) 48-72 Resident $ATTRIBUTE_LIST (32) No Limit Non-resident $FILE_NAME (48) 68-578 Resident, Index $OBJECT_ID (64) 0-256 Resident $SECURITY_DESCRIPTOR (80) No Limit Non-resident $VOLUME_NAME (96) 2-256 Resident $VOLUME_INFORMATION (112) 12-12 Resident $DATA (128) No Limit (None) $INDEX_ROOT (144) No Limit Resident $INDEX_ALLOCATION (160) No Limit Non-resident $BITMAP (176) No Limit Non-resident $REPARSE_POINT (192) 0-16384 Non-resident $EA_INFORMATION (208) 8-8 Resident $EA (224) 0-65536 (None) $LOGGED_UTILITY_STREAM (256) 0-65536 Non-resident Reported-by: woot000 Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon --- fs/ntfs/attrib.c | 15 ++------------- 1 file changed, 2 insertions(+), 13 deletions(-) diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c index 97b660eaa00c..7ab3571cc5f9 100644 --- a/fs/ntfs/attrib.c +++ b/fs/ntfs/attrib.c @@ -583,24 +583,13 @@ static u32 ntfs_resident_attr_min_value_length(const __le32 type) case AT_STANDARD_INFORMATION: return offsetof(struct standard_information, ver) + sizeof(((struct standard_information *)0)->ver.v1.reserved12); - case AT_ATTRIBUTE_LIST: - return offsetof(struct attr_list_entry, name); case AT_FILE_NAME: - return offsetof(struct file_name_attr, file_name); - case AT_OBJECT_ID: - return sizeof(struct guid); - case AT_SECURITY_DESCRIPTOR: - return sizeof(struct security_descriptor_relative); + return offsetof(struct file_name_attr, file_name) + + sizeof(__le16) * 1; case AT_VOLUME_INFORMATION: return sizeof(struct volume_information); - case AT_INDEX_ROOT: - return sizeof(struct index_root); - case AT_REPARSE_POINT: - return offsetof(struct reparse_point, reparse_data); case AT_EA_INFORMATION: return sizeof(struct ea_information); - case AT_EA: - return offsetof(struct ea_attr, ea_name) + 1; default: return 0; }