[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.115' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.725096][ T8391] [ 55.727758][ T8391] ==================================== [ 55.737438][ T8391] WARNING: iou-sqp-8390/8391 still has locks held! [ 55.746984][ T8391] 5.12.0-rc5-syzkaller #0 Not tainted [ 55.753053][ T8391] ------------------------------------ [ 55.759267][ T8391] 1 lock held by iou-sqp-8390/8391: [ 55.764703][ T8391] #0: ffff88801b6b5870 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread+0xff2/0x13a0 [ 55.774115][ T8391] [ 55.774115][ T8391] stack backtrace: [ 55.780075][ T8391] CPU: 1 PID: 8391 Comm: iou-sqp-8390 Not tainted 5.12.0-rc5-syzkaller #0 [ 55.788559][ T8391] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.798594][ T8391] Call Trace: [ 55.801852][ T8391] dump_stack+0x141/0x1d7 [ 55.806181][ T8391] get_signal+0x171a/0x2150 [ 55.810663][ T8391] ? mark_held_locks+0x9f/0xe0 [ 55.815408][ T8391] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 55.821198][ T8391] io_sq_thread+0x8d2/0x13a0