From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Darren Hart <dvhart@infradead.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [patch 0/3] futex: Prevent inconsistent state and exit race
Date: Thu, 2 Sep 2021 11:48:47 +0200 (CEST) [thread overview]
Message-ID: <20210902093755.087908334@linutronix.de> (raw)
The recent requeue PI changes introduced a condition where a waiter can
escape to user space with inconsistent state and in the worst case exit
before state has been made correct.
The following series addresses this.
Applies on top of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/urgent
Thanks,
tglx
---
futex.c | 185 +++++++++++++++++++++++++++++++++++++---------------------------
1 file changed, 109 insertions(+), 76 deletions(-)
next reply other threads:[~2021-09-02 9:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-02 9:48 Thomas Gleixner [this message]
2021-09-02 9:48 ` [patch 1/3] " Thomas Gleixner
2021-09-02 19:55 ` [tip: locking/urgent] " tip-bot2 for Thomas Gleixner
2021-09-02 20:14 ` tip-bot2 for Thomas Gleixner
2021-09-02 9:48 ` [patch 2/3] futex: Clarify comment for requeue_pi_wake_futex() Thomas Gleixner
2021-09-02 19:55 ` [tip: locking/urgent] " tip-bot2 for Thomas Gleixner
2021-09-02 20:14 ` tip-bot2 for Thomas Gleixner
2021-09-02 9:48 ` [patch 3/3] futex: Avoid redundant task lookup Thomas Gleixner
2021-09-02 19:55 ` [tip: locking/urgent] " tip-bot2 for Thomas Gleixner
2021-09-02 20:14 ` tip-bot2 for Thomas Gleixner
2021-09-02 11:06 ` [patch 0/3] futex: Prevent inconsistent state and exit race Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210902093755.087908334@linutronix.de \
--to=tglx@linutronix.de \
--cc=bigeasy@linutronix.de \
--cc=dave@stgolabs.net \
--cc=dvhart@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®