[  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.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts.
2020/05/30 15:07:25 fuzzer started
2020/05/30 15:07:26 dialing manager at 10.128.0.105:36125
2020/05/30 15:07:26 syscalls: 3055
2020/05/30 15:07:26 code coverage: enabled
2020/05/30 15:07:26 comparison tracing: enabled
2020/05/30 15:07:26 extra coverage: enabled
2020/05/30 15:07:26 setuid sandbox: enabled
2020/05/30 15:07:26 namespace sandbox: enabled
2020/05/30 15:07:26 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/30 15:07:26 fault injection: enabled
2020/05/30 15:07:26 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/30 15:07:26 net packet injection: enabled
2020/05/30 15:07:26 net device setup: enabled
2020/05/30 15:07:26 concurrency sanitizer: enabled
2020/05/30 15:07:26 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/30 15:07:26 USB emulation: enabled
2020/05/30 15:07:27 adding functions to KCSAN blacklist: 'ktime_get_real_seconds' 'copy_process' 'do_exit' 'run_timer_softirq' 'mod_timer' 'pcpu_alloc' '__x64_sys_ptrace' 'find_get_pages_range_tag' 'blk_mq_sched_dispatch_requests' 'do_wait' 'ep_poll' 'futex_wait_queue_me' 'blk_mq_dispatch_rq_list' 'page_counter_charge' 'do_nanosleep' '__ext4_new_inode' 
syzkaller login: [   81.800388][    T0] ==================================================================
[   81.808752][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   81.817913][    T0] 
[   81.820239][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   81.827619][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   81.833253][    T0]  do_idle+0x1ad/0x290
[   81.837308][    T0]  cpu_startup_entry+0x14/0x20
[   81.842264][    T0]  start_secondary+0x169/0x1b0
[   81.847023][    T0]  secondary_startup_64+0xa4/0xb0
[   81.852355][    T0] 
[   81.854743][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   81.862169][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   81.868369][    T0]  do_idle+0x1ad/0x290
[   81.872623][    T0]  cpu_startup_entry+0x14/0x20
[   81.877456][    T0]  rest_init+0xe4/0xeb
[   81.881558][    T0]  arch_call_rest_init+0x13/0x2b
[   81.886513][    T0]  start_kernel+0x7fe/0x823
[   81.891127][    T0]  secondary_startup_64+0xa4/0xb0
[   81.896130][    T0] 
[   81.898436][    T0] Reported by Kernel Concurrency Sanitizer on:
[   81.904583][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   81.912450][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   81.922487][    T0] ==================================================================
[   81.930544][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   81.937119][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   81.945000][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   81.955124][    T0] Call Trace:
[   81.958435][    T0]  dump_stack+0x11d/0x187
[   81.963146][    T0]  panic+0x210/0x640
[   81.967119][    T0]  ? vprintk_func+0x89/0x13a
[   81.972105][    T0]  kcsan_report.cold+0xc/0x1a
[   81.977123][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   81.982499][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   81.988129][    T0]  do_idle+0x1ad/0x290
[   81.992188][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   81.997652][    T0]  cpu_startup_entry+0x14/0x20
[   82.002432][    T0]  rest_init+0xe4/0xeb
[   82.006491][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   82.012809][    T0]  arch_call_rest_init+0x13/0x2b
[   82.017867][    T0]  start_kernel+0x7fe/0x823
[   82.022451][    T0]  secondary_startup_64+0xa4/0xb0
[   82.029146][    T0] Kernel Offset: disabled
[   82.033475][    T0] Rebooting in 86400 seconds..