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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Tue, 28 Feb 2023 08:56:57 +0100
Message-ID: <CACT4Y+bDpiHJ4yGYdv0DYYNwjkvTmV3F9p3Zq3jc+cZoqRSQJg@mail.gmail.com>
Subject: Re: [syzbot] [udf?] KASAN: null-ptr-deref Write in udf_write_fi
To:     syzbot <syzbot+8a5a459f324d510ea15a@syzkaller.appspotmail.com>
Cc:     jack@suse.com, jack@suse.cz, khoroshilov@ispras.ru,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        lvc-project@linuxtesting.org, pchelkin@ispras.ru,
        syzkaller-bugs@googlegroups.com
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On Mon, 27 Feb 2023 at 19:42, syzbot
<syzbot+8a5a459f324d510ea15a@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit e9109a92d2a95889498bed3719cd2318892171a2
> Author: Jan Kara <jack@suse.cz>
> Date:   Thu Oct 6 14:41:23 2022 +0000
>
>     udf: Convert udf_rename() to new directory iteration code
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1191f00f480000
> start commit:   55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=df75278aabf0681a
> dashboard link: https://syzkaller.appspot.com/bug?extid=8a5a459f324d510ea15a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=100a46c2880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=116a4e72880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: udf: Convert udf_rename() to new directory iteration code
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks sane:

#syz fix: udf: Convert udf_rename() to new directory iteration code