[  OK  ] Started Getty on tty2.
[  OK  ] Started Getty on tty1.
[  OK  ] Started Serial Getty on ttyS0.
[  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 '10.128.0.188' (ECDSA) to the list of known hosts.
2020/05/24 13:30:20 fuzzer started
2020/05/24 13:30:20 dialing manager at 10.128.0.105:40647
2020/05/24 13:30:20 syscalls: 3055
2020/05/24 13:30:20 code coverage: enabled
2020/05/24 13:30:20 comparison tracing: enabled
2020/05/24 13:30:20 extra coverage: enabled
2020/05/24 13:30:20 setuid sandbox: enabled
2020/05/24 13:30:20 namespace sandbox: enabled
2020/05/24 13:30:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/24 13:30:20 fault injection: enabled
2020/05/24 13:30:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/24 13:30:20 net packet injection: enabled
2020/05/24 13:30:20 net device setup: enabled
2020/05/24 13:30:20 concurrency sanitizer: enabled
2020/05/24 13:30:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/24 13:30:20 USB emulation: enabled
syzkaller login: [   52.804345][ T8938] KCSAN: could not find function: '_find_next_bit'
2020/05/24 13:30:23 adding functions to KCSAN blacklist: 'blk_mq_sched_dispatch_requests' 'do_nanosleep' 'install_new_memslots' '__mpage_writepage' 'alloc_pid' 'find_get_pages_range_tag' 'generic_write_end' 'io_sq_thread' 'blk_mq_get_request' '_find_next_bit' '__ext4_new_inode' '__snd_rawmidi_transmit_ack' 'ext4_mark_iloc_dirty' 'mod_timer' 'copy_process' 'ep_poll' 'run_timer_softirq' 'page_counter_charge' 'do_exit' 
[   55.646553][    T0] ==================================================================
[   55.654790][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   55.663364][    T0] 
[   55.665693][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[   55.674307][    T0]  tick_sched_do_timer+0xb4/0xd0
[   55.679251][    T0]  tick_sched_timer+0x3f/0xd0
[   55.683921][    T0]  __hrtimer_run_queues+0x271/0x600
[   55.689115][    T0]  hrtimer_interrupt+0x226/0x490
[   55.694052][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   55.699511][    T0]  apic_timer_interrupt+0xf/0x20
[   55.704436][    T0] 
[   55.706767][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   55.714581][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   55.720132][    T0]  do_idle+0x1ad/0x290
[   55.724211][    T0]  cpu_startup_entry+0x14/0x20
[   55.728974][    T0]  rest_init+0xe4/0xeb
[   55.733040][    T0]  arch_call_rest_init+0x13/0x2b
[   55.737972][    T0]  start_kernel+0x7fe/0x823
[   55.742564][    T0]  secondary_startup_64+0xa4/0xb0
[   55.747574][    T0] 
[   55.749894][    T0] Reported by Kernel Concurrency Sanitizer on:
[   55.756059][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   55.763951][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.774103][    T0] ==================================================================
[   55.782164][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   55.788758][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   55.796631][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.806785][    T0] Call Trace:
[   55.810137][    T0]  dump_stack+0x11d/0x187
[   55.814481][    T0]  panic+0x210/0x640
[   55.818379][    T0]  ? vprintk_func+0x89/0x13a
[   55.823066][    T0]  kcsan_report.cold+0xc/0x1a
[   55.827887][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   55.833264][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   55.838816][    T0]  do_idle+0x1ad/0x290
[   55.842988][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   55.848447][    T0]  cpu_startup_entry+0x14/0x20
[   55.853205][    T0]  rest_init+0xe4/0xeb
[   55.857280][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   55.863516][    T0]  arch_call_rest_init+0x13/0x2b
[   55.868556][    T0]  start_kernel+0x7fe/0x823
[   55.873059][    T0]  secondary_startup_64+0xa4/0xb0
[   55.879436][    T0] Kernel Offset: disabled
[   55.883794][    T0] Rebooting in 86400 seconds..