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From:   Aleksandr Nogikh <nogikh@google.com>
Date:   Tue, 8 Aug 2023 13:00:23 +0200
Message-ID: <CANp29Y6M-CU+eqUFqN3Rkf2iba7upqsLvnHNNyMmhd4JFdH-8A@mail.gmail.com>
Subject: Re: [syzbot] [fat?] possible deadlock in do_user_addr_fault
To:     syzbot <syzbot+278098b0faaf0595072b@syzkaller.appspotmail.com>
Cc:     linkinjeon@kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, sj1557.seo@samsung.com,
        syzkaller-bugs@googlegroups.com
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On Tue, Aug 8, 2023 at 12:42=E2=80=AFPM syzbot
<syzbot+278098b0faaf0595072b@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit ff84772fd45d486e4fc78c82e2f70ce5333543e6
> Author: Sungjong Seo <sj1557.seo@samsung.com>
> Date:   Fri Jul 14 08:43:54 2023 +0000
>
>     exfat: release s_lock before calling dir_emit()
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=3D16623aa9a8=
0000
> start commit:   f8dba31b0a82 Merge tag 'asym-keys-fix-for-linus-v6.4-rc5'=
 ..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3D3c980bfe8b399=
968
> dashboard link: https://syzkaller.appspot.com/bug?extid=3D278098b0faaf059=
5072b
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=3D144ccf79280=
000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=3D135fab7928000=
0
>
> If the result looks correct, please mark the issue as fixed by replying w=
ith:
>
> #syz fix: exfat: release s_lock before calling dir_emit()

Seems reasonable.
#syz fix: exfat: release s_lock before calling dir_emit()

>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisect=
ion
>
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