[GIT PULL] overlayfs fixes for 7.4-rc2

[Amir Goldstein <amir73il@gmail.com>]

Hi Linus,

Please pull overlayfs fixes for 7.4-rc2.

- Was in linux-next overnight

- Gone through the usual overlayfs test routines

- Merges cleanly with master branch of the moment

VFS NOTE: added export of symbol dentry_open_nonotify() that was added
by commit ebe559609d78 ("fs: get rid of __FMODE_NONOTIFY kludge").
Note that before removing the __FMODE_NONOTIFY kludge, overlayfs and other
modules could open a FMODE_NONOTIFY file with dentry_open().

Thanks,
Amir.

----------------------------------------------------------------
The following changes since commit 51628610f9187c1c1cfe499d92e066bc22ad9693:

  vfs: fix take_dentry_name_snapshot() semantics (2026-11-03 08:28:20 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-fixes-7.4-rc2

for you to fetch changes up to db1c5da238dc80a61ab429a7b71b0e2835766c45:

  selftests/fscontext_ns: expect EINVAL for overlay descendant userns create (2026-11-04 21:47:48 +0100)

----------------------------------------------------------------
overlayfs fixes for 7.4-rc2

- Fix a self deadlock of a fanotify permission event listener that also
  watches the layers, when it reads an overlay directory

- Three casefold fixes, found by Chris Mason's AI review

- Fix a decode of a modified file handle with nfs_export=on, which could
  read the stale lower data of a copied up file, also found by Chris
  Mason's AI review

- Fix an overlay selftest after an errno change

----------------------------------------------------------------
Amir Goldstein (3):
      ovl: inherit FMODE_NONOTIFY when opening directory realfiles
      ovl: inherit FMODE_NONOTIFY when reading directory layers
      selftests/fscontext_ns: expect EINVAL for overlay descendant userns create

Chris Mason (4):
      ovl: fail the mount if the casefold flag has changed
      ovl: do not let chattr change the casefold flag
      ovl: fix whiteout creation in casefolded directories
      ovl: look up the index by the decoded origin

 Documentation/filesystems/overlayfs.rst            |  3 +-
 fs/open.c                                          |  1 +
 fs/overlayfs/dir.c                                 | 46 ++++++++++++----------
 fs/overlayfs/export.c                              |  4 +-
 fs/overlayfs/inode.c                               |  8 ++++
 fs/overlayfs/namei.c                               | 13 ++++--
 fs/overlayfs/overlayfs.h                           | 21 +++++-----
 fs/overlayfs/readdir.c                             | 35 +++++++++-------
 fs/overlayfs/super.c                               | 12 +++++-
 fs/overlayfs/util.c                                | 13 +++++-
 .../filesystems/fscontext_ns/fscontext_ns_test.c   |  2 +-
 11 files changed, 102 insertions(+), 56 deletions(-)