[  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 '10.128.0.147' (ECDSA) to the list of known hosts.
2020/05/29 14:17:52 fuzzer started
2020/05/29 14:17:53 dialing manager at 10.128.0.105:37521
2020/05/29 14:17:55 syscalls: 3055
2020/05/29 14:17:55 code coverage: enabled
2020/05/29 14:17:55 comparison tracing: enabled
2020/05/29 14:17:55 extra coverage: enabled
2020/05/29 14:17:55 setuid sandbox: enabled
2020/05/29 14:17:55 namespace sandbox: enabled
2020/05/29 14:17:55 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/29 14:17:55 fault injection: enabled
2020/05/29 14:17:55 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/29 14:17:55 net packet injection: enabled
2020/05/29 14:17:55 net device setup: enabled
2020/05/29 14:17:55 concurrency sanitizer: enabled
2020/05/29 14:17:55 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/29 14:17:55 USB emulation: enabled
2020/05/29 14:17:57 adding functions to KCSAN blacklist: 'copy_process' 'n_tty_receive_buf_common' 'tick_nohz_idle_stop_tick' 'futex_wait_queue_me' 'page_counter_charge' 'find_get_pages_range_tag' 'xas_clear_mark' '__ext4_new_inode' 'do_nanosleep' 'ext4_mb_good_group' 'file_update_time' 'ep_poll' 'generic_write_end' 'kauditd_thread' 
syzkaller login: [   69.018767][    T0] ==================================================================
[   69.027179][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   69.035325][    T0] 
[   69.037664][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   69.045308][    T0]  tick_sched_do_timer+0xb4/0xd0
[   69.050244][    T0]  tick_sched_timer+0x3f/0xd0
[   69.055020][    T0]  __hrtimer_run_queues+0x271/0x600
[   69.060470][    T0]  hrtimer_interrupt+0x226/0x490
[   69.065409][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   69.070998][    T0]  apic_timer_interrupt+0xf/0x20
[   69.075935][    T0] 
[   69.078260][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   69.085637][    T0]  tick_nohz_next_event+0x181/0x340
[   69.090826][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   69.096378][    T0]  do_idle+0x1ad/0x290
[   69.100429][    T0]  cpu_startup_entry+0x14/0x20
[   69.105176][    T0]  start_secondary+0x169/0x1b0
[   69.109929][    T0]  secondary_startup_64+0xa4/0xb0
[   69.114921][    T0] 
[   69.117224][    T0] Reported by Kernel Concurrency Sanitizer on:
[   69.123366][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   69.131759][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   69.143964][    T0] ==================================================================
[   69.152030][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   69.158606][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   69.166913][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   69.176942][    T0] Call Trace:
[   69.180224][    T0]  dump_stack+0x11d/0x187
[   69.184554][    T0]  panic+0x210/0x640
[   69.188437][    T0]  ? vprintk_func+0x89/0x13a
[   69.193008][    T0]  kcsan_report.cold+0xc/0x1a
[   69.197681][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   69.203052][    T0]  tick_nohz_next_event+0x181/0x340
[   69.208255][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   69.213779][    T0]  ? ktime_get+0x1c9/0x210
[   69.218175][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   69.223625][    T0]  do_idle+0x1ad/0x290
[   69.227682][    T0]  cpu_startup_entry+0x14/0x20
[   69.232429][    T0]  start_secondary+0x169/0x1b0
[   69.237190][    T0]  secondary_startup_64+0xa4/0xb0
[   69.244016][    T0] Kernel Offset: disabled
[   69.248393][    T0] Rebooting in 86400 seconds..