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

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Message-ID: <CACVXFVP0un7xv0_rZHV9d-jtDSSKpJcrFcmDsDiaj4j2CqV+DQ@mail.gmail.com>
Date:   Mon, 22 Mar 2021 10:35:43 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Bart Van Assche <bvanassche@....org>
Cc:     syzbot <syzbot+8fede7e30c7cee0de139@...kaller.appspotmail.com>,
        Jens Axboe <axboe@...nel.dk>,
        linux-block <linux-block@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: use-after-free Read in disk_part_iter_next (2)

On Mon, Mar 22, 2021 at 7:03 AM Bart Van Assche <bvanassche@....org> wrote:
>
> On 3/14/21 4:08 AM, syzbot wrote:
> > syzbot found the following issue on:
> >
> > HEAD commit:    280d542f Merge tag 'drm-fixes-2021-03-05' of git://anongit..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=15ade5aed00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=952047a9dbff6a6a
> > dashboard link: https://syzkaller.appspot.com/bug?extid=8fede7e30c7cee0de139
>
> #syz test: https://github.com/bvanassche/linux a5f35387ebdc

It should be the same issue which was addressed by

   aebf5db91705 block: fix use-after-free in disk_part_iter_next

but converting to xarray introduced the issue again.

-- 
Ming Lei