[  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 '10.128.0.122' (ECDSA) to the list of known hosts.
2020/05/30 15:13:14 fuzzer started
2020/05/30 15:13:14 dialing manager at 10.128.0.105:36125
2020/05/30 15:13:17 syscalls: 3055
2020/05/30 15:13:17 code coverage: enabled
2020/05/30 15:13:17 comparison tracing: enabled
2020/05/30 15:13:17 extra coverage: enabled
2020/05/30 15:13:17 setuid sandbox: enabled
2020/05/30 15:13:17 namespace sandbox: enabled
2020/05/30 15:13:17 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/30 15:13:17 fault injection: enabled
2020/05/30 15:13:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/30 15:13:17 net packet injection: enabled
2020/05/30 15:13:17 net device setup: enabled
2020/05/30 15:13:17 concurrency sanitizer: enabled
2020/05/30 15:13:17 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/30 15:13:17 USB emulation: enabled
2020/05/30 15:13:19 adding functions to KCSAN blacklist: 'copy_process' 'do_exit' 'run_timer_softirq' 'ktime_get_real_seconds' 'generic_write_end' 'pcpu_alloc' '__x64_sys_ptrace' 'find_get_pages_range_tag' 'mod_timer' 'ep_poll' 'futex_wait_queue_me' 'blk_mq_dispatch_rq_list' 'page_counter_charge' 'do_nanosleep' '__ext4_new_inode' 'blk_mq_sched_dispatch_requests' 'do_wait' 'echo_char' 'tick_nohz_idle_stop_tick' 
syzkaller login: [   86.643808][    T0] ==================================================================
[   86.651959][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   86.660098][    T0] 
[   86.662429][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[   86.670083][    T0]  tick_sched_do_timer+0xb4/0xd0
[   86.675030][    T0]  tick_sched_timer+0x3f/0xd0
[   86.679709][    T0]  __hrtimer_run_queues+0x271/0x600
[   86.684904][    T0]  hrtimer_interrupt+0x226/0x490
[   86.689958][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   86.695396][    T0]  apic_timer_interrupt+0xf/0x20
[   86.700334][    T0] 
[   86.702639][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   86.709897][    T0]  tick_nohz_next_event+0x181/0x340
[   86.715078][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   86.720604][    T0]  do_idle+0x1ad/0x290
[   86.724661][    T0]  cpu_startup_entry+0x14/0x20
[   86.729409][    T0]  rest_init+0xe4/0xeb
[   86.733457][    T0]  arch_call_rest_init+0x13/0x2b
[   86.738379][    T0]  start_kernel+0x7fe/0x823
[   86.742857][    T0]  secondary_startup_64+0xa4/0xb0
[   86.747856][    T0] 
[   86.750167][    T0] Reported by Kernel Concurrency Sanitizer on:
[   86.756296][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   86.764162][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   86.774199][    T0] ==================================================================
[   86.782247][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   86.788825][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   86.796693][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   86.806735][    T0] Call Trace:
[   86.810003][    T0]  dump_stack+0x11d/0x187
[   86.814329][    T0]  panic+0x210/0x640
[   86.818211][    T0]  ? vprintk_func+0x89/0x13a
[   86.822777][    T0]  kcsan_report.cold+0xc/0x1a
[   86.827434][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   86.832786][    T0]  tick_nohz_next_event+0x181/0x340
[   86.837976][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   86.843510][    T0]  ? ktime_get+0x1c9/0x210
[   86.847905][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   86.853340][    T0]  do_idle+0x1ad/0x290
[   86.857383][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   86.862817][    T0]  cpu_startup_entry+0x14/0x20
[   86.867553][    T0]  rest_init+0xe4/0xeb
[   86.871598][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   86.877814][    T0]  arch_call_rest_init+0x13/0x2b
[   86.882730][    T0]  start_kernel+0x7fe/0x823
[   86.887322][    T0]  secondary_startup_64+0xa4/0xb0
[   86.893660][    T0] Kernel Offset: disabled
[   86.897987][    T0] Rebooting in 86400 seconds..