linux-kernel - [PATCH bpf-next 0/7] bpf: introduce and use rcu_migrate

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: <20250815061824.765906-1-dongml2@chinatelecom.cn>
Date: Fri, 15 Aug 2025 14:18:17 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: ast@...nel.org
Cc: daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next 0/7] bpf: introduce and use rcu_migrate_{enable,disable}

migrate_disable() and rcu_read_lock() are used to together in many case in
bpf. However, when PREEMPT_RCU is not enabled, rcu_read_lock() indicate
migrate_disable(), so we don't need to call it in this case.

In this series, we introduce rcu_migrate_disable and rcu_migrate_enable,
which will call migrate_disable and migrate_enable only when PREEMPT_RCU
enabled. And replace the migrate_enable/migrate_disable with
rcu_migrate_enable/rcu_migrate_disable in bpf.

Menglong Dong (7):
  rcu: add rcu_migrate_enable and rcu_migrate_disable
  bpf: use rcu_migrate_* for bpf_cgrp_storage_free()
  bpf: use rcu_migrate_* for bpf_inode_storage_free()
  bpf: use rcu_migrate_* for bpf_iter_run_prog()
  bpf: use rcu_migrate_* for bpf_task_storage_free()
  bpf: use rcu_migrate_* for bpf_prog_run_array_cg()
  bpf: use rcu_migrate_* for trampoline.c

 include/linux/rcupdate.h       | 18 ++++++++++++++++++
 kernel/bpf/bpf_cgrp_storage.c  |  4 ++--
 kernel/bpf/bpf_inode_storage.c |  4 ++--
 kernel/bpf/bpf_iter.c          |  4 ++--
 kernel/bpf/bpf_task_storage.c  |  4 ++--
 kernel/bpf/cgroup.c            |  4 ++--
 kernel/bpf/trampoline.c        | 12 ++++++------
 7 files changed, 34 insertions(+), 16 deletions(-)

-- 
2.50.1