[GIT PULL] hfs/hfsplus changes for 6.19-rc1

[Viacheslav Dubeyko]

Hello Linus,

This pull request contains several fixes of syzbot reported
issues, HFS/HFS+ fixes of xfstests failures, Kunit-based unit-tests
introduction, and code cleanup.

Dan Carpenter has fixed the potential use-after-free issue
in hfs_correct_next_unused_CNID() method. Tetsuo Handa has made
nice fix of syzbot reported issue related to incorrect
inode->i_mode management if volume has been corrupted somehow.
Yang Chenzhi has made really good fix of potential race
condition in __hfs_bnode_create() method for HFS+ file system.

Several patches fix the xfstests failures. Particularly, generic/070,
generic/073, and generic/101 test-cases can be finished successfully
for the case of HFS+ file system right now.

HFS and HFS+ drivers share multiple structures of on-disk layout
declarations. Some structures are used without any change. However,
we had two independent declarations of the same structures in
HFS and HFS+ drivers. The on-disk layout declarations have been moved
into include/linux/hfs_common.h with the goal to exclude the
declarations duplication and to keep the HFS/HFS+ on-disk layout
declarations in one place. Also, this patch prepares
the basis for creating a hfslib that can aggregate common
functionality without necessity to duplicate the same code
in HFS and HFS+ drivers.

HFS/HFS+ really need unit-tests because of multiple xfstests
failures. The first two patches introduce Kunit-based unit-tests
for the case string operations in HFS/HFS+ file system drivers.

The following changes since commit
3a8660878839faadb4f1a6dd72c3179c1df56787:

  Linux 6.18-rc1 (2025-10-12 13:42:36 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vdubeyko/hfs.git
tags/hfs-v6.19-tag1

for you to fetch changes up to
ec95cd103c3a1e2567927014e4a710416cde3e52:

  hfs/hfsplus: move on-disk layout declarations into hfs_common.h
(2025-11-25 15:16:03 -0800)

----------------------------------------------------------------
hfs/hfsplus updates for v6.19

- hfs/hfsplus: move on-disk layout declarations into hfs_common.h
- hfsplus: fix volume corruption issue for generic/101
- hfsplus: introduce KUnit tests for HFS+ string operations
- hfs: introduce KUnit tests for HFS string operations
- hfsplus: fix volume corruption issue for generic/073
- hfsplus: Verify inode mode when loading from disk
- hfsplus: fix volume corruption issue for generic/070
- hfs/hfsplus: prevent getting negative values of offset/length
- hfsplus: fix missing hfs_bnode_get() in __hfs_bnode_create
- hfs: fix potential use after free in hfs_correct_next_unused_CNID()

----------------------------------------------------------------
Dan Carpenter (1):
      hfs: fix potential use after free in
hfs_correct_next_unused_CNID()

Tetsuo Handa (1):
      hfsplus: Verify inode mode when loading from disk

Viacheslav Dubeyko (7):
      hfs/hfsplus: prevent getting negative values of offset/length
      hfsplus: fix volume corruption issue for generic/070
      hfsplus: fix volume corruption issue for generic/073
      hfs: introduce KUnit tests for HFS string operations
      hfsplus: introduce KUnit tests for HFS+ string operations
      hfsplus: fix volume corruption issue for generic/101
      hfs/hfsplus: move on-disk layout declarations into hfs_common.h

Yang Chenzhi (1):
      hfsplus: fix missing hfs_bnode_get() in __hfs_bnode_create

 fs/hfs/.kunitconfig        |    7 +
 fs/hfs/Kconfig             |   15 +
 fs/hfs/Makefile            |    2 +
 fs/hfs/bfind.c             |    2 +-
 fs/hfs/bnode.c             |   52 +-
 fs/hfs/brec.c              |    2 +-
 fs/hfs/btree.c             |    2 +-
 fs/hfs/btree.h             |  113 +---
 fs/hfs/catalog.c           |    2 +-
 fs/hfs/hfs.h               |  269 +-------
 fs/hfs/hfs_fs.h            |   89 +--
 fs/hfs/inode.c             |    3 +-
 fs/hfs/string.c            |    5 +
 fs/hfs/string_test.c       |  133 ++++
 fs/hfsplus/.kunitconfig    |    8 +
 fs/hfsplus/Kconfig         |   15 +
 fs/hfsplus/Makefile        |    3 +
 fs/hfsplus/bfind.c         |    2 +-
 fs/hfsplus/bnode.c         |   64 +-
 fs/hfsplus/brec.c          |    2 +-
 fs/hfsplus/btree.c         |    2 +-
 fs/hfsplus/dir.c           |    7 +-
 fs/hfsplus/hfsplus_fs.h    |   41 +-
 fs/hfsplus/hfsplus_raw.h   |  394 +----------
 fs/hfsplus/inode.c         |   41 +-
 fs/hfsplus/super.c         |   87 ++-
 fs/hfsplus/unicode.c       |   16 +-
 fs/hfsplus/unicode_test.c  | 1579
++++++++++++++++++++++++++++++++++++++++++++
 fs/hfsplus/xattr.c         |   22 +-
 include/linux/hfs_common.h |  633 ++++++++++++++++++
 30 files changed, 2698 insertions(+), 914 deletions(-)
 create mode 100644 fs/hfs/.kunitconfig
 create mode 100644 fs/hfs/string_test.c
 create mode 100644 fs/hfsplus/.kunitconfig
 create mode 100644 fs/hfsplus/unicode_test.c