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SubjectRe: possible deadlock in console_unlock
syzbot has bisected this bug to:

commit b6da31b2c07c46f2dcad1d86caa835227a16d9ff
Author: DaeRyong Jeong <>
Date: Mon Apr 30 15:27:04 2018 +0000

tty: Fix data race in tty_insert_flip_string_fixed_flag

bisection log:
start commit: 0ad39cb3 Merge tag 'kconfig-v4.18' of git://
git tree: upstream
final crash:
console output:
kernel config:
dashboard link:
syz repro:
C reproducer:

Fixes: b6da31b2c07c ("tty: Fix data race in

For information about bisection process see:

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