[  OK  ] Started Getty on tty4.
[  OK  ] Started Getty on tty3.
[  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 '10.128.15.216' (ECDSA) to the list of known hosts.
2020/06/10 01:24:04 fuzzer started
2020/06/10 01:24:05 dialing manager at 10.128.0.105:35015
2020/06/10 01:24:05 syscalls: 3072
2020/06/10 01:24:05 code coverage: enabled
2020/06/10 01:24:05 comparison tracing: enabled
2020/06/10 01:24:05 extra coverage: enabled
2020/06/10 01:24:05 setuid sandbox: enabled
2020/06/10 01:24:05 namespace sandbox: enabled
2020/06/10 01:24:05 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/10 01:24:05 fault injection: enabled
2020/06/10 01:24:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/10 01:24:05 net packet injection: enabled
2020/06/10 01:24:05 net device setup: enabled
2020/06/10 01:24:05 concurrency sanitizer: enabled
2020/06/10 01:24:05 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/10 01:24:05 USB emulation: enabled
2020/06/10 01:24:07 adding functions to KCSAN blacklist: 'xas_clear_mark' 'page_counter_charge' 'do_nanosleep' 'find_get_pages_range_tag' 'blk_mq_dispatch_rq_list' 'generic_fillattr' 'pcpu_alloc' '__ext4_new_inode' 'mod_timer' 'echo_char' 'blk_mq_get_request' 'ktime_get_real_seconds' 'copy_process' '__send_signal' 'run_timer_softirq' 'futex_wait_queue_me' 'generic_write_end' 'ep_poll' '_find_next_bit' 
syzkaller login: [   52.680312][ T8928] KCSAN: could not find function: '_find_next_bit'
[  127.677402][    T0] ==================================================================
[  127.685566][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  127.694206][    T0] 
[  127.696527][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  127.703899][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  127.709421][    T0]  do_idle+0x1ad/0x290
[  127.713464][    T0]  cpu_startup_entry+0x14/0x20
[  127.718212][    T0]  start_secondary+0x169/0x1b0
[  127.722965][    T0]  secondary_startup_64+0xa4/0xb0
[  127.727975][    T0] 
[  127.730291][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[  127.737548][    T0]  tick_nohz_next_event+0x181/0x340
[  127.742819][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  127.748340][    T0]  do_idle+0x1ad/0x290
[  127.752383][    T0]  cpu_startup_entry+0x14/0x20
[  127.757119][    T0]  rest_init+0xe4/0xeb
[  127.761162][    T0]  arch_call_rest_init+0x13/0x2b
[  127.766073][    T0]  start_kernel+0x7fe/0x823
[  127.770566][    T0]  secondary_startup_64+0xa4/0xb0
[  127.775577][    T0] 
[  127.777962][    T0] Reported by Kernel Concurrency Sanitizer on:
[  127.784112][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  127.791970][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  127.802014][    T0] ==================================================================
[  127.810722][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  127.817336][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  127.825208][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  127.835235][    T0] Call Trace:
[  127.838521][    T0]  dump_stack+0x11d/0x187
[  127.842828][    T0]  panic+0x210/0x640
[  127.846731][    T0]  ? vprintk_func+0x89/0x13a
[  127.851309][    T0]  kcsan_report.cold+0xc/0x1a
[  127.855978][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  127.861331][    T0]  tick_nohz_next_event+0x181/0x340
[  127.866506][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  127.872023][    T0]  ? ktime_get+0x1c9/0x210
[  127.876414][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  127.882371][    T0]  do_idle+0x1ad/0x290
[  127.886413][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  127.891935][    T0]  cpu_startup_entry+0x14/0x20
[  127.896693][    T0]  rest_init+0xe4/0xeb
[  127.900738][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[  127.906952][    T0]  arch_call_rest_init+0x13/0x2b
[  127.911876][    T0]  start_kernel+0x7fe/0x823
[  127.916354][    T0]  secondary_startup_64+0xa4/0xb0
[  127.922647][    T0] Kernel Offset: disabled
[  127.926963][    T0] Rebooting in 86400 seconds..