linux-kernel - Re: [PATCH v3 2/6] workqueue: kasan: record workqueue stack

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Message-ID: <20200902145241.GG4230@mtj.thefacebook.com>
Date:   Wed, 2 Sep 2020 10:52:41 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Walter Wu <walter-zh.wu@...iatek.com>
Cc:     Marco Elver <elver@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        wsd_upstream <wsd_upstream@...iatek.com>,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 2/6] workqueue: kasan: record workqueue stack

On Tue, Aug 25, 2020 at 09:58:33AM +0800, Walter Wu wrote:
> Records the last two enqueuing work call stacks in order to print them
> in KASAN report. It is useful for programmers to solve use-after-free
> or double-free memory workqueue issue.
> 
> For workqueue it has turned out to be useful to record the enqueuing
> work call stacks. Because user can see KASAN report to determine
> whether it is root cause. They don't need to enable debugobjects,
> but they have a chance to find out the root cause.
> 
> Signed-off-by: Walter Wu <walter-zh.wu@...iatek.com>
> Suggested-by: Marco Elver <elver@...gle.com>
> Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: Alexander Potapenko <glider@...gle.com>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Lai Jiangshan <jiangshanlai@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun