linux-kernel - Re: [PATCH v2] kernel/sched: Fix sched_fork() access an invalid sched_task

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

Message-ID: <YUDMhMgM4ZECVBo8@slm.duckdns.org>
Date:   Tue, 14 Sep 2021 06:23:32 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Zhang Qiao <zhangqiao22@...wei.com>
Cc:     mingo@...hat.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com
Subject: Re: [PATCH v2] kernel/sched: Fix sched_fork() access an invalid
 sched_task_group

On Tue, Sep 14, 2021 at 04:20:02PM +0800, Zhang Qiao wrote:
> Perhaps we can fix this bug at sched_post_fork(), which is executed between cgroup_can_fork()
> and cgroup_post_fork(). Relocate the fectching of task_group and access it at sched_post_fork().

Can't we just add a can_fork callback in cpu_cgrp_subsys?

-- 
tejun