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Date:   Sun, 24 Nov 2019 18:41:01 -0800
From:   syzbot <syzbot+43e93968b964e369db0b@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, gregkh@...uxfoundation.org,
        jslaby@...e.com, linux-kernel@...r.kernel.org,
        linux-serial@...r.kernel.org, penguin-kernel@...ove.SAKURA.ne.jp,
        pmladek@...e.com, rostedt@...dmis.org,
        sergey.senozhatsky.work@...il.com, sergey.senozhatsky@...il.com,
        syzkaller-bugs@...glegroups.com, threeearcat@...il.com
Subject: Re: possible deadlock in console_unlock

syzbot has bisected this bug to:

commit b6da31b2c07c46f2dcad1d86caa835227a16d9ff
Author: DaeRyong Jeong <threeearcat@...il.com>
Date:   Mon Apr 30 15:27:04 2018 +0000

     tty: Fix data race in tty_insert_flip_string_fixed_flag

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12d9bc0ee00000
start commit:   0ad39cb3 Merge tag 'kconfig-v4.18' of git://git.kernel.org..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11d9bc0ee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=16d9bc0ee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b9a1f3aa8b8ddd16
dashboard link: https://syzkaller.appspot.com/bug?extid=43e93968b964e369db0b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14c89b9f800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=167f596f800000

Reported-by: syzbot+43e93968b964e369db0b@...kaller.appspotmail.com
Fixes: b6da31b2c07c ("tty: Fix data race in  
tty_insert_flip_string_fixed_flag")

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

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