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SubjectRe: KASAN: use-after-free Read in tty_open
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syzbot has bisected this bug to:

commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
Author: Russell Currey <ruscur@russell.cc>
Date: Mon Feb 8 04:08:20 2016 +0000

powerpc/powernv: Remove support for p5ioc2

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e5fc32e00000
start commit: 76bb8b05 Merge tag 'kbuild-v5.5' of git://git.kernel.org/p..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=17e5fc32e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13e5fc32e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=dd226651cb0f364b
dashboard link: https://syzkaller.appspot.com/bug?extid=9af6d43c1beabec8fd05
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d15061e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b69aeae00000

Reported-by: syzbot+9af6d43c1beabec8fd05@syzkaller.appspotmail.com
Fixes: 2de50e9674fc ("powerpc/powernv: Remove support for p5ioc2")

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

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