From: Thomas Gleixner <tglx@linutronix.de>
To: Walter Wu <walter-zh.wu@mediatek.com>,
Andrew Morton <akpm@linux-foundation.org>,
John Stultz <john.stultz@linaro.org>,
Stephen Boyd <sboyd@kernel.org>, Tejun Heo <tj@kernel.org>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Marco Elver <elver@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Konovalov <andreyknvl@google.com>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
wsd_upstream <wsd_upstream@mediatek.com>,
linux-mediatek@lists.infradead.org,
Walter Wu <walter-zh.wu@mediatek.com>
Subject: Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN
Date: Wed, 30 Sep 2020 17:29:40 +0200 [thread overview]
Message-ID: <87h7rfi8pn.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20200924040152.30851-1-walter-zh.wu@mediatek.com>
On Thu, Sep 24 2020 at 12:01, Walter Wu wrote:
> Syzbot reports many UAF issues for workqueue or timer, see [1] and [2].
> In some of these access/allocation happened in process_one_work(),
> we see the free stack is useless in KASAN report, it doesn't help
> programmers to solve UAF on workqueue. The same may stand for times.
>
> This patchset improves KASAN reports by making them to have workqueue
> queueing stack and timer stack information. It is useful for programmers
> to solve use-after-free or double-free memory issue.
>
> Generic KASAN also records the last two workqueue and timer stacks and
> prints them in KASAN report. It is only suitable for generic KASAN.
>
> [1]https://groups.google.com/g/syzkaller-bugs/search?q=%22use-after-free%22+process_one_work
> [2]https://groups.google.com/g/syzkaller-bugs/search?q=%22use-after-free%22%20expire_timers
How are these links useful for people who do not have a gurgle account?
next prev parent reply other threads:[~2020-09-30 15:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 4:01 Walter Wu
2020-09-24 11:51 ` Alexander Potapenko
2020-09-24 12:33 ` Walter Wu
2020-09-30 15:29 ` Thomas Gleixner [this message]
2020-12-01 7:59 ` Dmitry Vyukov
[not found] ` <1606821422.6563.10.camel@mtksdccf07>
2020-12-01 14:02 ` Dmitry Vyukov
2020-12-01 14:13 ` Thomas Gleixner
2020-12-01 14:51 ` Dmitry Vyukov
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