linux-kernel - Re: [syzbot] [fat?] possible deadlock in do_user_addr

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Date:   Tue, 08 Aug 2023 03:42:40 -0700
From:   syzbot <syzbot+278098b0faaf0595072b@...kaller.appspotmail.com>
To:     linkinjeon@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, sj1557.seo@...sung.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fat?] possible deadlock in do_user_addr_fault

syzbot suspects this issue was fixed by commit:

commit ff84772fd45d486e4fc78c82e2f70ce5333543e6
Author: Sungjong Seo <sj1557.seo@...sung.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=16623aa9a80000
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=3c980bfe8b399968
dashboard link: https://syzkaller.appspot.com/bug?extid=278098b0faaf0595072b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=144ccf79280000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=135fab79280000

If the result looks correct, please mark the issue as fixed by replying with:

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

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