Date:   Tue, 29 Nov 2022 03:11:17 +0000
From:   David Wang 王标 <wangbiao3@...omi.com>
To:     Waiman Long <longman@...hat.com>, Ingo Molnar <mingo@...hat.com>,
        "Peter Zijlstra" <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        "Daniel Bristot de Oliveira" <bristot@...hat.com>
CC:     Phil Auld <pauld@...hat.com>,
        Wenjie Li <wenjieli@....qualcomm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: 答复: 答复: [External Mail][PATCH-tip] sched: Fix use-after-free bug in dup_user_cpus_ptr()

Hi  Waiman,  Peterz,

We test new patch basing on user requested affinity patchset(the latest tip tree).

You use 7 patch from ACK code . You check following  link change.
https://android-review.googlesource.com/c/kernel/common/+/2266724
https://android-review.googlesource.com/c/kernel/common/+/2266744
https://android-review.googlesource.com/c/kernel/common/+/2266745
https://android-review.googlesource.com/c/kernel/common/+/2266804
https://android-review.googlesource.com/c/kernel/common/+/2266784
https://android-review.googlesource.com/c/kernel/common/+/2267468
https://android-review.googlesource.com/c/kernel/common/+/2267664

You can confirm this with google team and check
https://partnerissuetracker.corp.google.com/u/0/issues/256578302 .

Hi  Peterz ,

Could you help merge
https://lore.kernel.org/all/20221125023943.1118603-1-longman@redhat.com/

We want to provide better product for user.
Thanks

David.

-----邮件原件-----
发件人: Waiman Long <longman@...hat.com>
发送时间: 2022年11月28日 23:43
收件人: David Wang 王标 <wangbiao3@...omi.com>; Ingo Molnar <mingo@...hat.com>; Peter Zijlstra <peterz@...radead.org>; Juri Lelli <juri.lelli@...hat.com>; Vincent Guittot <vincent.guittot@...aro.org>; Dietmar Eggemann <dietmar.eggemann@....com>; Steven Rostedt <rostedt@...dmis.org>; Ben Segall <bsegall@...gle.com>; Mel Gorman <mgorman@...e.de>; Daniel Bristot de Oliveira <bristot@...hat.com>
抄送: Phil Auld <pauld@...hat.com>; Wenjie Li <wenjieli@....qualcomm.com>; linux-kernel@...r.kernel.org; stable@...r.kernel.org
主题: Re: 答复: [External Mail][PATCH-tip] sched: Fix use-after-free bug in dup_user_cpus_ptr()

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On 11/28/22 08:34, David Wang 王标 wrote:
> Hi, Waiman
>
> We use 140 devices to test this patch 72 hours.  The issue can not be reproduced.  If no this patch,  the issue can be reproduced.
> Could you help merge this patch to mailine?
>
> https://lore.kernel.org/all/20221125023943.1118603-1-longman@redhat.co
> m/
>
> If this patch is applied to the maintainer's tree,  we can request google to help cherrypick to ACK to fix issue.

Just want to clarify if you are testing the patch using the latest tip tree or on top of an existing linux version without the persistent user requested affinity patchset.

PeterZ is the scheduler maintainer who is responsible for merging scheduler related patch. It is up to him as to when that will happen.

Cheers,
Longman

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