[  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 '10.128.0.156' (ECDSA) to the list of known hosts.
2020/05/13 10:38:24 fuzzer started
2020/05/13 10:38:24 dialing manager at 10.128.0.105:36659
2020/05/13 10:38:24 syscalls: 3055
2020/05/13 10:38:24 code coverage: enabled
2020/05/13 10:38:24 comparison tracing: enabled
2020/05/13 10:38:24 extra coverage: enabled
2020/05/13 10:38:24 setuid sandbox: enabled
2020/05/13 10:38:24 namespace sandbox: enabled
2020/05/13 10:38:24 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/13 10:38:24 fault injection: enabled
2020/05/13 10:38:24 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/13 10:38:24 net packet injection: enabled
2020/05/13 10:38:24 net device setup: enabled
2020/05/13 10:38:24 concurrency sanitizer: enabled
2020/05/13 10:38:24 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/13 10:38:24 USB emulation: enabled
syzkaller login: [   52.132845][ T8921] KCSAN: could not find function: '_find_next_bit'
2020/05/13 10:38:27 adding functions to KCSAN blacklist: 'ep_poll' '__lru_cache_add' 'blk_mq_sched_dispatch_requests' 'wbt_issue' 'run_timer_softirq' 'find_get_pages_range_tag' '_find_next_bit' 'page_counter_charge' 'generic_write_end' 'xas_clear_mark' 'pipe_double_lock' 'ktime_get_real_seconds' '__ext4_new_inode' 'mod_timer' '__inet_hash_connect' 'do_nanosleep' 
[   84.176975][    T0] ==================================================================
[   84.185119][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   84.195424][    T0] 
[   84.197753][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[   84.205385][    T0]  tick_sched_do_timer+0xb4/0xd0
[   84.210327][    T0]  tick_sched_timer+0x3f/0xd0
[   84.215014][    T0]  __hrtimer_run_queues+0x271/0x600
[   84.220308][    T0]  hrtimer_interrupt+0x226/0x490
[   84.225223][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   84.230662][    T0]  apic_timer_interrupt+0xf/0x20
[   84.235570][    T0] 
[   84.237875][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   84.245227][    T0]  tick_nohz_next_event+0x181/0x340
[   84.250418][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   84.255938][    T0]  do_idle+0x1ad/0x290
[   84.259981][    T0]  cpu_startup_entry+0x14/0x20
[   84.264718][    T0]  rest_init+0xe4/0xeb
[   84.268765][    T0]  arch_call_rest_init+0x13/0x2b
[   84.273679][    T0]  start_kernel+0x7fe/0x823
[   84.278161][    T0]  secondary_startup_64+0xa4/0xb0
[   84.283158][    T0] 
[   84.285472][    T0] Reported by Kernel Concurrency Sanitizer on:
[   84.291611][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   84.299472][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   84.309513][    T0] ==================================================================
[   84.317557][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   84.324132][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   84.332003][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   84.342051][    T0] Call Trace:
[   84.345329][    T0]  dump_stack+0x11d/0x187
[   84.349655][    T0]  panic+0x210/0x640
[   84.353551][    T0]  ? vprintk_func+0x89/0x13a
[   84.358568][    T0]  kcsan_report.cold+0xc/0x1a
[   84.363237][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   84.368592][    T0]  tick_nohz_next_event+0x181/0x340
[   84.373770][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   84.379298][    T0]  ? ktime_get+0x1c9/0x210
[   84.383702][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   84.389139][    T0]  do_idle+0x1ad/0x290
[   84.393185][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   84.398631][    T0]  cpu_startup_entry+0x14/0x20
[   84.403370][    T0]  rest_init+0xe4/0xeb
[   84.407419][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   84.413647][    T0]  arch_call_rest_init+0x13/0x2b
[   84.418560][    T0]  start_kernel+0x7fe/0x823
[   84.423042][    T0]  secondary_startup_64+0xa4/0xb0
[   84.429601][    T0] Kernel Offset: disabled
[   84.433947][    T0] Rebooting in 86400 seconds..