overlay filesystem · Supported

Maintainers

• M Miklos Szeredi <miklos@szeredi.hu>
• M Amir Goldstein <amir73il@gmail.com>

Paths

• F Documentation/filesystems/overlayfs.rst
• F fs/overlayfs/

Last 30 days

Most active threads (last 7 days)

• WARM1d [PATCH stable/linux-5.10.y 0/7] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-29 06:38 · 3 replies in 7d · Cai Xinchen <hidden>
• WARM1d [PATCH v3 stable/linux-6.12.y 0/3] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-29 06:52 · 1 reply in 7d · Cai Xinchen <hidden>
• COOLING4d [PATCH v2 stable/linux-6.6.y 0/3] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-27 06:29 · 1 reply in 7d · Cai Xinchen <hidden>
• COOLING4d [PATCH v2 stable/linux-6.12.y 0/2] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-27 04:00 · 1 reply in 7d · Cai Xinchen <hidden>
• COOLING5d [PATCH v2 stable/linux-6.18.y 0/2] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-26 07:22 · 1 reply in 7d · Cai Xinchen <hidden>
• COOLING6d [PATCH v2 stable/linux-6.18.y 0/2] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls
  2026-06-26 02:12 · 1 reply in 7d · Cai Xinchen <hidden>

Active reviewers (last 30 days)

• Christian Brauner <brauner@kernel.org>
  10 attestations (10 Reviewed-by) · last on 2026-06-29
• Amir Goldstein <amir73il@gmail.com>
  9 attestations (9 Reviewed-by) · last on 2026-06-29
• Serge Hallyn <serge@hallyn.com>
  9 attestations (9 Reviewed-by) · last on 2026-06-29
• Giuseppe Scrivano <hidden>
  1 attestation (1 Tested-by) · last on 2026-06-29

Recent patches

Most-recent 30 patches in this subsystem on linux-unionfs (capped at 30), ordered by date desc.

• WARM1d REVIEWED: 13 (13M) [PATCH v3 stable/linux-6.12.y 2/3] lsm: add backing_file LSM hooks
  2026-06-29 · Cai Xinchen <hidden>
• WARM1d REVIEWED: 13 (13M) [PATCH stable/linux-5.10.y 6/7] lsm: add backing_file LSM hooks
  2026-06-29 · Cai Xinchen <hidden>
• WARM1d [PATCH stable/linux-5.10.y 3/7] fs: use backing_file container for internal files with "fake" f_path
  2026-06-29 · Cai Xinchen <hidden>
• WARM1d REVIEWED: 4 (3M) [PATCH stable/linux-5.10.y 1/7] ovl: pass layer mnt to ovl_open_realfile()
  2026-06-29 · Cai Xinchen <hidden>
• COOLING4d REVIEWED: 13 (13M) [PATCH v2 stable/linux-6.6.y 2/3] lsm: add backing_file LSM hooks
  2026-06-27 · Cai Xinchen <hidden>
• COOLING4d REVIEWED: 13 (13M) [PATCH v2 stable/linux-6.12.y 1/2] lsm: add backing_file LSM hooks
  2026-06-27 · Cai Xinchen <hidden>
• COOLING5d REVIEWED: 13 (13M) [PATCH v2 stable/linux-6.18.y 1/2] lsm: add backing_file LSM hooks
  2026-06-26 · Cai Xinchen <hidden>
• COOLING6d REVIEWED: 13 (13M) [PATCH v2 stable/linux-6.18.y 1/2] lsm: add backing_file LSM hooks
  2026-06-26 · Cai Xinchen <hidden>
• COOLING8d Re: [PATCH] ovl: Allow changing default fsync_mode
  2026-06-23 · Amir Goldstein <amir73il@gmail.com>
• WARM1d [PATCH 2/3] ovl: support cachestat() syscall on overlayfs files
  2026-06-23 · Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
• COOLING8d [PATCH] ovl: Allow changing default fsync_mode
  2026-06-23 · Yafang Shao <hidden>
• COOLING10d REVIEWED: 13 (13M) [stable/linux-6.6.y 2/3] lsm: add backing_file LSM hooks
  2026-06-22 · Cai Xinchen <hidden>
• COOLING6d REVIEWED: 13 (13M) [stable/linux-6.12.y 1/2] lsm: add backing_file LSM hooks
  2026-06-22 · Cai Xinchen <hidden>
• COOLING6d REVIEWED: 13 (13M) [stable/linux-6.18.y 1/2] lsm: add backing_file LSM hooks
  2026-06-22 · Cai Xinchen <hidden>
• COOLING13d [PATCH 10/10] ovl: document security.capability idmapping on the xattr forward paths
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 07/10] docs: document idmapped overlay mounts
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 06/10] ovl: allow idmapping overlay mounts
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 05/10] ovl: handle idmapped mounts in ovl_set_acl()
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 04/10] ovl: handle idmapped mounts in ovl_getattr()
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 03/10] ovl: handle idmapped mounts in ovl_setattr()
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 02/10] ovl: handle idmapped mounts in ovl_permission()
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING13d [PATCH 01/10] ovl: handle idmapped mounts in ovl_create_object() and ovl_tmpfile()
  2026-06-15 · Christian Brauner <brauner@kernel.org>
• COOLING12d [PATCH] ovl: fix comment about locking order
  2026-06-09 · Amir Goldstein <amir73il@gmail.com>
• COOLING8d REVIEWED: 8 (8M) [PATCH v10 03/22] ovl: use core fsverity ensure info interface
  2026-05-20 · Andrey Albershteyn <aalbersh@kernel.org>
• COLD43d [PATCH v2 18/21] backing-inode: add backing_inode_setattr()
  2026-05-16 · Joanne Koong <joannelkoong@gmail.com>
• COLD43d [PATCH v2 17/21] backing-inode: add backing_inode_copyattr()
  2026-05-16 · Joanne Koong <joannelkoong@gmail.com>
• COLD44d [PATCH v2] ovl: keep err zero after successful ovl_cache_get()
  2026-05-14 · Nirmoy Das <hidden>
• COLD44d [PATCH] ovl: keep err zero after successful ovl_cache_get()
  2026-05-14 · Nirmoy Das <hidden>
• COLD48d [RFC PATCH] ovl: keep merged and impure readdir caches separate
  2026-05-11 · Nirmoy Das <hidden>
• COOLING14d [PATCH] ovl: use linked upper dentry in copy-up tmpfile
  2026-05-01 · Souvik Banerjee <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE170d REVIEWED: 4 (4M) [PATCH 08/11] fs: add support for non-blocking timestamp updates
  2025-12-23 · Christoph Hellwig <hch@lst.de> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 1 (1M) [PATCH v5.10] ovl: Use "buf" flexible array for memcpy() destination
  2025-12-31 · Shivani Agarwal <hidden> · 1 Reviewed-by
• STALE170d REVIEWED: 13 (13M) [PATCH 08/11] fs: add support for non-blocking timestamp updates
  2026-01-08 · Christoph Hellwig <hch@lst.de> · 2 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• DORMANTno replies [PATCH] Add initerofs for EROFS-backed early rootfs
  2025-12-31 · Eric Curtin <hidden>
• STALE118d [PATCH 17/24] overlayfs: add setlease file operation
  2026-01-08 · Jeff Layton <jlayton@kernel.org>
• STALE154d [PATCH 2/3] fs: add helpers name_is_dot{,dot,_dotdot}
  2026-01-28 · Amir Goldstein <amir73il@gmail.com>
• STALE124d [PATCH 44/61] overlayfs: update format strings for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE119d [PATCH v2 042/110] overlayfs: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE119d [PATCH v2 094/110] overlayfs: replace PRIino with %llu/%llx format strings
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• DORMANTno replies [PATCH v7] backing_file: store an internal O_PATH user_path_file
  2026-03-20 · Amir Goldstein <amir73il@gmail.com>
• STALE66d [PATCH v2 09/19] ovl: stop using lookup_one() in iterate_shared() handling.
  2026-04-27 · NeilBrown <hidden>
• STALE66d [PATCH v2 10/19] VFS/ovl: add d_alloc_noblock_return()
  2026-04-27 · NeilBrown <hidden>