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Wed, 02 Sep 2020 07:52:49 -0700 (PDT) Date: Wed, 2 Sep 2020 10:52:41 -0400 From: Tejun Heo To: Walter Wu Cc: Marco Elver , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , Andrew Morton , Lai Jiangshan , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wsd_upstream , linux-mediatek@lists.infradead.org Subject: Re: [PATCH v3 2/6] workqueue: kasan: record workqueue stack Message-ID: <20200902145241.GG4230@mtj.thefacebook.com> References: <20200825015833.27900-1-walter-zh.wu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200825015833.27900-1-walter-zh.wu@mediatek.com> X-Rspamd-Queue-Id: 024F51814B0C8 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 > Suggested-by: Marco Elver > Cc: Andrey Ryabinin > Cc: Dmitry Vyukov > Cc: Alexander Potapenko > Cc: Tejun Heo > Cc: Lai Jiangshan Acked-by: Tejun Heo Thanks. -- tejun