[GIT PULL] overlayfs fixes for 7.4-rc3

[Amir Goldstein <amir73il@gmail.com>]

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Hi Linus,

Please pull overlayfs fixes for 7.4-rc3.

- Was in linux-next overnight

- Gone through the usual overlayfs test routines

- Merges cleanly with master branch of the moment

Thanks,
Amir.

----------------------------------------------------------------
The following changes since commit 7475ea8b58616b33c04afb976cf0fbaad9dd63fb:

  Linux 7.4-rc2 (2026-11-08 16:22:20 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-fixes-7.4-rc3

for you to fetch changes up to 748739f3171ed1c44a30a98b0e0341b1a8d62d31:

  selftests: overlayfs: reject different lower idmaps on same fs (2026-11-12 13:38:59 +0100)

----------------------------------------------------------------
overlayfs fixes for 7.4-rc3

- Fixes for data-only layers (composefs), some for regressions from
  v6.16, which relaxed the requirements for redirects to data-only layers

- Fix a use-after-free in lookup of a hardlink with a FUSE upper,
  reported by Sashiko

- Fix a mount failure right after unmount of an overlay with the same
  upperdir

- Reject lower layers on the same fs with different idmaps, which could
  decode file handles through the wrong layer

- Minor fixes for a memory leak, an error message and readdir d_ino

----------------------------------------------------------------
Amir Goldstein (5):
      ovl: do not read the flags of a put upper dentry in lookup
      ovl: fix leak of lowerdata redirect on ovl_get_inode() failure
      ovl: do not check the deferred lowerdata redirect on index lookup
      ovl: do not allow nfs_export with data-only layers
      ovl: report the requested redirect_dir mode in conflicting options

Daejun Park (1):
      ovl: bump the impure dir version when linking a file with origin

Denis V. Lunev (1):
      ovl: release the upperdir/workdir in-use locks before the umount sync

Giuseppe Scrivano (3):
      ovl: do not always clear absolute_redirect
      ovl: follow lower to lowerdata redirects from any lower layer
      ovl: return EIO if the lowerdata is missing

Jérémy Jean (2):
      ovl: reject different lower idmaps on the same fs
      selftests: overlayfs: reject different lower idmaps on same fs

 Documentation/filesystems/overlayfs.rst            | 24 +++---
 fs/overlayfs/dir.c                                 | 20 ++---
 fs/overlayfs/namei.c                               | 61 ++++++++++++---
 fs/overlayfs/overlayfs.h                           | 22 +++++-
 fs/overlayfs/ovl_entry.h                           |  2 +
 fs/overlayfs/params.c                              | 91 +++++++++++++++++-----
 fs/overlayfs/params.h                              |  2 +
 fs/overlayfs/super.c                               | 52 +++++++++++--
 fs/overlayfs/util.c                                | 12 +++
 .../filesystems/overlayfs/idmapped_mounts.c        | 45 +++++++++++
 10 files changed, 270 insertions(+), 61 deletions(-)