linux-kernel - [PATCH 00/14] ns: rework reference counting

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250918-work-namespace-ns_ref-v1-0-1b0a98ee041e@kernel.org>
Date: Thu, 18 Sep 2025 12:11:45 +0200
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org
Cc: Amir Goldstein <amir73il@...il.com>, Josef Bacik <josef@...icpanda.com>, 
 Jeff Layton <jlayton@...nel.org>, Mike Yuan <me@...dnzj.com>, 
 Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>, 
 Lennart Poettering <mzxreary@...inter.de>, 
 Daan De Meyer <daan.j.demeyer@...il.com>, Aleksa Sarai <cyphar@...har.com>, 
 Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, 
 Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>, 
 Michal Koutný <mkoutny@...e.com>, 
 Jakub Kicinski <kuba@...nel.org>, 
 Anna-Maria Behnsen <anna-maria@...utronix.de>, 
 Frederic Weisbecker <frederic@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>, cgroups@...r.kernel.org, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH 00/14] ns: rework reference counting

Stop open accesses to the reference counts and cargo-culting the same
code in all namespace. Use a set of dedicated helpers and make the
actual count private.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
Christian Brauner (14):
      ns: add reference count helpers
      mnt: port to ns_ref_*() helpers
      cgroup: port to ns_ref_*() helpers
      ipc: port to ns_ref_*() helpers
      pid: port to ns_ref_*() helpers
      time: port to ns_ref_*() helpers
      user: port to ns_ref_*() helpers
      net-sysfs: use check_net()
      net: use check_net()
      ipv4: use check_net()
      uts: port to ns_ref_*() helpers
      net: port to ns_ref_*() helpers
      nsfs: port to ns_ref_*() helpers
      ns: rename to __ns_ref

 fs/mount.h                       |  2 +-
 fs/namespace.c                   |  4 ++--
 fs/nsfs.c                        |  2 +-
 include/linux/cgroup_namespace.h |  4 ++--
 include/linux/ipc_namespace.h    |  4 ++--
 include/linux/ns_common.h        | 47 ++++++++++++++++++++++++++++++----------
 include/linux/pid_namespace.h    |  2 +-
 include/linux/time_namespace.h   |  4 ++--
 include/linux/user_namespace.h   |  4 ++--
 include/linux/uts_namespace.h    |  4 ++--
 include/net/net_namespace.h      |  8 +++----
 init/version-timestamp.c         |  2 +-
 ipc/msgutil.c                    |  2 +-
 ipc/namespace.c                  |  2 +-
 kernel/cgroup/cgroup.c           |  2 +-
 kernel/nscommon.c                |  2 +-
 kernel/pid.c                     |  2 +-
 kernel/pid_namespace.c           |  4 ++--
 kernel/time/namespace.c          |  2 +-
 kernel/user.c                    |  2 +-
 kernel/user_namespace.c          |  2 +-
 net/core/net-sysfs.c             |  6 ++---
 net/core/net_namespace.c         |  2 +-
 net/ipv4/inet_timewait_sock.c    |  4 ++--
 net/ipv4/tcp_metrics.c           |  2 +-
 25 files changed, 73 insertions(+), 48 deletions(-)
---
base-commit: 3f9cc273c16f63b5d584ec4e767918765c44316b
change-id: 20250917-work-namespace-ns_ref-357162ca7aa8