[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty1.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   55.338560][ T8398] 
[   55.341116][ T8398] ====================================
[   55.346741][ T8398] WARNING: iou-sqp-8397/8398 still has locks held!
[   55.353479][ T8398] 5.12.0-rc5-syzkaller #0 Not tainted
[   55.358839][ T8398] ------------------------------------
[   55.364469][ T8398] 1 lock held by iou-sqp-8397/8398:
[   55.369654][ T8398]  #0: ffff88801231e470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread+0xff2/0x13a0
[   55.378728][ T8398] 
[   55.378728][ T8398] stack backtrace:
[   55.384626][ T8398] CPU: 0 PID: 8398 Comm: iou-sqp-8397 Not tainted 5.12.0-rc5-syzkaller #0
[   55.393110][ T8398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.403137][ T8398] Call Trace:
[   55.406573][ T8398]  dump_stack+0x141/0x1d7
[   55.410885][ T8398]  get_signal+0x171a/0x2150
[   55.415361][ T8398]  ? mark_held_locks+0x9f/0xe0
[   55.420276][ T8398]  ? _raw_spin_unlock_irqrestore+0x50/0x70
[   55.426059][ T8398]  io_sq_thread+0x8d2/0x13a0
[   55.430626][ T8398]  ? io_submit_sqes+0x63e0/0x63e0
[   55.435800][ T8398]  ? finish_wait+