Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <000000000000dda2f905da80c934@google.com> <00000000000009cf1e05da85bb31@google.com>
In-Reply-To: <00000000000009cf1e05da85bb31@google.com>
From:   Muchun Song <songmuchun@bytedance.com>
Date:   Sat, 19 Mar 2022 10:19:12 +0800
Message-ID: <CAMZfGtWL-2+en7=FKBoPUwq1FMGYYqZCvB1jmJ7fhiQc1XX4oQ@mail.gmail.com>
Subject: Re: [syzbot] WARNING: kobject bug in erofs_unregister_sysfs
To:     syzbot <syzbot+f05ba4652c0471416eaf@syzkaller.appspotmail.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>, chao@kernel.org,
        linux-erofs@lists.ozlabs.org, LKML <linux-kernel@vger.kernel.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        syzkaller-bugs@googlegroups.com, xiang@kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Sat, Mar 19, 2022 at 6:33 AM syzbot
<syzbot+f05ba4652c0471416eaf@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this issue to:
>
> commit 2768c206f2c3e95c0e5cf2e7f846103fda7cd429
> Author: Muchun Song <songmuchun@bytedance.com>
> Date:   Thu Mar 3 01:15:36 2022 +0000
>
>     mm: list_lru: allocate list_lru_one only when needed
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1495694d700000
> start commit:   91265a6da44d Add linux-next specific files for 20220303
> git tree:       linux-next
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1695694d700000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1295694d700000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=617f79440a35673a
> dashboard link: https://syzkaller.appspot.com/bug?extid=f05ba4652c0471416eaf
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137f17d9700000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=114ebabd700000
>
> Reported-by: syzbot+f05ba4652c0471416eaf@syzkaller.appspotmail.com
> Fixes: 2768c206f2c3 ("mm: list_lru: allocate list_lru_one only when needed")

Does this patch [1] fix the issue? If yes, I am confused why the Fixes tag
should be the commit 2768c206f2c3?  What am I missing here?

[1] https://lore.kernel.org/r/20220315132814.12332-1-dzm91@hust.edu.cn

Thanks.