[  OK  ] Started Getty on tty1.
[  OK  ] Found device /dev/ttyS0.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Reached target Login Prompts.
[  OK  ] Started OpenBSD Secure Shell server.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.862797][ T8360] 
[   47.865170][ T8360] ====================================
[   47.870607][ T8360] WARNING: iou-sqp-8359/8360 still has locks held!
[   47.877225][ T8360] 5.12.0-rc5-syzkaller #0 Not tainted
[   47.882662][ T8360] ------------------------------------
[   47.888128][ T8360] 1 lock held by iou-sqp-8359/8360:
[   47.893403][ T8360]  #0: ffff888017399070 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread+0xfba/0x13b0
[   47.902509][ T8360] 
[   47.902509][ T8360] stack backtrace:
[   47.908391][ T8360] CPU: 0 PID: 8360 Comm: iou-sqp-8359 Not tainted 5.12.0-rc5-syzkaller #0
[   47.916891][ T8360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.926924][ T8360] Call Trace:
[   47.930202][ T8360]  dump_stack+0x176/0x24e
[   47.934524][ T8360]  get_signal+0x127/0x2030
[   47.938926][ T8360]  ? io_sq_thread+0x10bf/0x13b0
[   47.943770][ T8360]  ? rcu_read_lock_sched_held+0x41/0xb0
[   47.949298][ T8360]  ? _raw_spin_unlock_irqrestore+0x3f/0xc0
[   47.955102][ T8360]  ? lockdep_hardirqs_on+0x8d/0x130
[   47.960278][ T8360]  io_sq_threa