linux-kernel - Re: [PATCH v2 0/3] kunit: fix a UAF bug and do some optimization

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Message-ID: <CAFd5g457_aWs2mbiD0Eq6Tz=8dpjJD9nHa+iK-RTe8H6kXwT=A@mail.gmail.com>
Date:   Thu, 10 Mar 2022 03:07:48 -0500
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     Peng Liu <liupeng256@...wei.com>
Cc:     glider@...gle.com, elver@...gle.com, dvyukov@...gle.com,
        akpm@...ux-foundation.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        wangkefeng.wang@...wei.com
Subject: Re: [PATCH v2 0/3] kunit: fix a UAF bug and do some optimization

On Wed, Mar 9, 2022 at 3:19 AM 'Peng Liu' via KUnit Development
<kunit-dev@...glegroups.com> wrote:
>
> This series is to fix UAF when running kfence test case test_gfpzero,
> which is time costly. This UAF bug can be easily triggered by setting
> CONFIG_KFENCE_NUM_OBJECTS = 65535. Furthermore, some optimization for
> kunit tests has been done.

I was able to reproduce the error you described and can confirm that I
didn't see the UAF after applying your patches.

Tested-by: Brendan Higgins <brendanhiggins@...gle.com>