[PATCH 6.1.y 0/4] fs/ntfs3: backport slab-out-of-bounds fix (CVE-2026-90048)

[Nikita Nagornyi]

This series backports the fix for a slab-out-of-bounds write in the ntfs3
driver (CVE-2026-90048, an Important / CVSS 7.8 issue) to 6.1.y, together
with its stable dependency chain.

Four commits do not cherry-pick cleanly onto 6.1.y, so each carries a comment,
where adapted. Applied in order:

  a8f659ce14f8 ("fs/ntfs3: Add more checks in mi_enum_attr (part 2)")
      - dependency
  2afd4d267e6d ("fs/ntfs3: Mark inode as bad as soon as error detected in
      mi_enum_attr()")
      - dependency; introduces the struct ntfs_inode *ni parameter threaded
        through mi_enum_attr()/mi_find_attr()/mi_insert_attr()/mi_new_attt_id()
  5f33da04e6ce ("fs/ntfs3: fix KMSAN uninit-value in ni_create_attr_list")
      - dependency
  7c4841e2a627 ("fs/ntfs3: fix slab-out-of-bounds write in
      ni_create_attr_list()")
      - the fix

Built and boot-tested on x86_64 and aarch64. Tested on Amazon EC2 using our
internal test suite, including xfstests, kselftest, LTP; passed with no regressions.

HE WEI（ギカク） (1):
  fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()

Konstantin Komarov (2):
  fs/ntfs3: Add more checks in mi_enum_attr (part 2)
  fs/ntfs3: Mark inode as bad as soon as error detected in
    mi_enum_attr()

Nirbhay Sharma (1):
  fs/ntfs3: fix KMSAN uninit-value in ni_create_attr_list

 fs/ntfs3/attrib.c  | 11 +++---
 fs/ntfs3/frecord.c | 81 +++++++++++++++++++++++++----------------
 fs/ntfs3/ntfs_fs.h | 23 ++++++------
 fs/ntfs3/record.c  | 91 +++++++++++++++++++++++++++-------------------
 4 files changed, 120 insertions(+), 86 deletions(-)


base-commit: 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f
--
2.50.1