linux-kernel - Re: [syzbot] [serial?] KASAN: use-after-free Read in gsm_cleanup

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Message-ID: <CANp29Y5Xp3gSJ4JC6QP_XSiWPPoAsOV8EPEyCNrwPy-cFc2uFw@mail.gmail.com>
Date:   Mon, 2 Oct 2023 13:40:01 +0200
From:   Aleksandr Nogikh <nogikh@...gle.com>
To:     syzbot <syzbot+893c55305230e719a203@...kaller.appspotmail.com>
Cc:     daniel.starke@...mens.com, gregkh@...uxfoundation.org,
        hdanton@...a.com, jirislaby@...nel.org,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, yiyang13@...wei.com,
        zhangqiumiao1@...wei.com
Subject: Re: [syzbot] [serial?] KASAN: use-after-free Read in gsm_cleanup_mux

On Sun, Oct 1, 2023 at 6:29 AM syzbot
<syzbot+893c55305230e719a203@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 3c4f8333b582487a2d1e02171f1465531cde53e3
> Author: Yi Yang <yiyang13@...wei.com>
> Date:   Fri Aug 11 03:11:21 2023 +0000
>
>     tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=121e6a92680000
> start commit:   a4412fdd49dc error-injection: Add prompt for function erro..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=cc4b2e0a8e8a8366
> dashboard link: https://syzkaller.appspot.com/bug?extid=893c55305230e719a203
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12b1ca83880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1023c5e3880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux

#syz fix: tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux

>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> --