[PATCH 6.6 0/3] Manual backport of overlayfs fixes from v6.6.72

[Amir Goldstein <amir73il@gmail.com>]

Greg,

Per your request, here is a manual backport of the overlayfs fixes that
were applied in v6.6.72 and reverted in v6.6.73.

For the record, this overlayfs series from v6.7 [2] changes subtle
internal semantics across overlayfs code, which are not detectable by
build error and therefore are a backporting landmine.

This is exactly what happened with the automatic apply of dependecy
patch in v6.6.72.

I will try to be extra diligent about review of auto backports below
v6.7 from now on.

Luckily, the leaked mount reference was caught by a vfs assertion and
promptly reported by Ignat from Cloudflare team.

Thanks!
Amir.

[1] https://lore.kernel.org/stable/2025012123-cable-reburial-568e@gregkh/
[2] https://lore.kernel.org/linux-unionfs/20230816152334.924960-1-amir73il@gmail.com/

Amir Goldstein (3):
  ovl: pass realinode to ovl_encode_real_fh() instead of realdentry
  ovl: support encoding fid from inode with no alias
  fs: relax assertions on failure to encode file handles

 fs/notify/fdinfo.c       |  4 +---
 fs/overlayfs/copy_up.c   | 16 ++++++-------
 fs/overlayfs/export.c    | 49 ++++++++++++++++++++++------------------
 fs/overlayfs/namei.c     |  4 ++--
 fs/overlayfs/overlayfs.h |  2 +-
 5 files changed, 39 insertions(+), 36 deletions(-)

-- 
2.34.1