[PATCH v2 0/4] ntfs: tighten EA and index metadata validation

[Hyunchul Lee <hyc.lee@gmail.com>]

This series tightens validation of on-disk NTFS metadata in the read path.

The first four patches move index validation closer to the point
where index metadata is read and tighten the structural checks for both
$INDEX_ROOT and INDX block headers. The last patch adds a missing bounds
check before accessing fields in an EA entry.

To: Namjae Jeon <linkinjeon@kernel.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: charsyam@gmail.com
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>

Hyunchul Lee (4):
  ntfs: validate index block header more strictly
  ntfs: centalize $INDEX_ROOT header validation
  ntfs: validate index entries on reading
  ntfs: add bounds check before accessing EA entries

---
Changes in v2:
  - Added a Tested-by tag.
  - Addressed comments by DeaMyung Kang.
    * Patch 1: Moved changes to make make ntfs_index_block_inconsistent()
      return -EIO from patch 3.
    * Patch 1: Made ntfs_index_header_inconsistent() verify the remaining
      space before accessing index_header fields.
    * Patch 4: Removed a redundant pre-loop check.

 fs/ntfs/dir.c   |  64 +++-------------
 fs/ntfs/ea.c    |  16 ++--
 fs/ntfs/index.c | 197 ++++++++++++++++++++++++++++++++----------------
 fs/ntfs/index.h |  12 ++-
 fs/ntfs/inode.c |  15 ++--
 5 files changed, 165 insertions(+), 139 deletions(-)

-- 
2.43.0