linux-kernel - Re: [syzbot] KASAN: use-after-free Read in nilfs_segctor

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Message-ID: <CAKFNMom7Z_5QWaGTG-=C67n0aT__nu4Wfs=Tsa3jgpXQMtWkEA@mail.gmail.com>
Date:   Mon, 3 Oct 2022 00:52:18 +0900
From:   Ryusuke Konishi <konishi.ryusuke@...il.com>
To:     000000000000219dcd05e9f95ed9@...gle.com
Cc:     linux-kernel@...r.kernel.org, linux-nilfs@...r.kernel.org,
        syzkaller-bugs@...glegroups.com,
        syzbot <syzbot+b8c672b0e22615c80fe0@...kaller.appspotmail.com>
Subject: Re: [syzbot] KASAN: use-after-free Read in nilfs_segctor_confirm

On Sun, Oct 2, 2022 at 6:25 PM Khalid Masum wrote:
>
> Hi all,
>
> The reproducer triggers the same bug in upstream 6.0-rc7 as well.
>
>
> Thanks,
>
>    -- Khalid Masum

It looks like this and a few similar issues are caused by duplicate
inode allocation with the same inode number
as the root inode on a corrupted disk image.

I'm now digging into the issue and trying to fix it.

Thanks,
Ryusuke Konishi