linux-kernel - [PATCH net v5 0/1] net/sched: act_gate: snapshot parameters with RCU on replace

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20260205150958.412278-1-p@1g4.org>
Date: Thu, 05 Feb 2026 15:10:23 +0000
From: Paul Moses <p@....org>
To: Victor Nogueira <victor@...atatu.com>, Jamal Hadi Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us>
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Paul Moses <p@....org>
Subject: [PATCH net v5 0/1] net/sched: act_gate: snapshot parameters with RCU on replace

This series fixes a schedule lifetime race in `act_gate` between the
control-plane replace path and the running hrtimer callback (gate_timer_func).

Changes since v4:
- Drop the gate_clockid_to_offset helper, validate clockid once, and set
  tk_offset in one place.
- Seed missing attrs from the old params when entries are replaced
- Reimplemented the timer cancel from RCU snapshot and cancel before taking tcf_lock.
- Reuse a single protected deref under tcf_lock
- Compare old/new values directly in gate_timer_needs_cancel()
- Cleanup no longer assumes rtnl_lock

Paul Moses (1):
  net/sched: act_gate: snapshot parameters with RCU on replace

 include/net/tc_act/tc_gate.h |  33 ++++-
 net/sched/act_gate.c         | 266 ++++++++++++++++++++++++++---------
 2 files changed, 228 insertions(+), 71 deletions(-)

-- 
2.52.GIT