linux-kernel - [PATCH 0/2] PM: Add a switch for disabling/enabling sync() before suspend

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: <1ee5b9ef-f30e-3fde-2325-ba516a96ced5@freesources.org>
Date:   Mon, 2 Dec 2019 18:05:27 +0100
From:   Jonas Meurer <jonas@...esources.org>
To:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Tim Dittler <tim.dittler@...temli.org>,
        Yannik Sembritzki <yannik@...britzki.me>
Subject: [PATCH 0/2] PM: Add a switch for disabling/enabling sync() before
 suspend

Hello,

Introduce a new run-time sysfs switch to disable/enable sync() before
system suspend. This is useful to avoid races and deadlocks if block
devices have been suspended before, e.g. by 'cryptsetup luksSuspend'.

The second patch changes the behaviour of build-time switch
'CONFIG_SUSPEND_SKIP_SYNC' accordingly, using the build-time switch value
as default for our new run-time switch '/sys/power/sync_on_suspend'.

Jonas Meurer (2):
  PM: Add a switch for disabling/enabling sync() before suspend
  PM: CONFIG_SUSPEND_SKIP_SYNC sets default for '/sys/power/sync_on_suspend'

 Documentation/ABI/testing/sysfs-power | 15 +++++++++++++++
 include/linux/suspend.h               |  2 ++
 kernel/power/Kconfig                  |  5 ++++-
 kernel/power/main.c                   | 33 +++++++++++++++++++++++++++++++++
 kernel/power/suspend.c                |  2 +-
 5 files changed, 55 insertions(+), 2 deletions(-)