[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Reached target Login Prompts.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts.
2020/06/04 01:36:00 fuzzer started
2020/06/04 01:36:00 dialing manager at 10.128.0.105:35977
2020/06/04 01:36:04 syscalls: 3055
2020/06/04 01:36:04 code coverage: enabled
2020/06/04 01:36:04 comparison tracing: enabled
2020/06/04 01:36:04 extra coverage: enabled
2020/06/04 01:36:04 setuid sandbox: enabled
2020/06/04 01:36:04 namespace sandbox: enabled
2020/06/04 01:36:04 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/04 01:36:04 fault injection: enabled
2020/06/04 01:36:04 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/04 01:36:04 net packet injection: enabled
2020/06/04 01:36:04 net device setup: enabled
2020/06/04 01:36:04 concurrency sanitizer: enabled
2020/06/04 01:36:04 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/04 01:36:04 USB emulation: enabled
2020/06/04 01:36:06 adding functions to KCSAN blacklist: 'generic_fillattr' 'ep_poll' 'find_get_pages_range_tag' 'complete_signal' 'generic_file_read_iter' '__ext4_new_inode' 'futex_wait_queue_me' 'alloc_pid' 'generic_write_end' 'ext4_free_inodes_count' 'tick_sched_do_timer' 'add_timer' 'do_nanosleep' 'do_signal_stop' 'pcpu_alloc' 'mod_timer' 'wbt_done' 'blk_mq_dispatch_rq_list' 'run_timer_softirq' 'page_counter_charge' 
syzkaller login: [   93.557166][    T0] ==================================================================
[   93.565375][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   93.574275][    T0] 
[   93.576585][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   93.584042][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   93.589565][    T0]  do_idle+0x1ad/0x290
[   93.593610][    T0]  cpu_startup_entry+0x14/0x20
[   93.598351][    T0]  rest_init+0xe4/0xeb
[   93.602395][    T0]  arch_call_rest_init+0x13/0x2b
[   93.607309][    T0]  start_kernel+0x7fe/0x823
[   93.611788][    T0]  secondary_startup_64+0xa4/0xb0
[   93.616780][    T0] 
[   93.619102][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   93.626362][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   93.631883][    T0]  do_idle+0x1ad/0x290
[   93.635928][    T0]  cpu_startup_entry+0x14/0x20
[   93.640674][    T0]  start_secondary+0x169/0x1b0
[   93.645416][    T0]  secondary_startup_64+0xa4/0xb0
[   93.650409][    T0] 
[   93.652710][    T0] Reported by Kernel Concurrency Sanitizer on:
[   93.658858][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   93.666722][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   93.676756][    T0] ==================================================================
[   93.684791][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   93.691364][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   93.699239][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   93.709269][    T0] Call Trace:
[   93.712542][    T0]  dump_stack+0x11d/0x187
[   93.717649][    T0]  panic+0x210/0x640
[   93.721534][    T0]  ? vprintk_func+0x89/0x13a
[   93.726103][    T0]  kcsan_report.cold+0xc/0x1a
[   93.730764][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   93.736123][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   93.741652][    T0]  do_idle+0x1ad/0x290
[   93.745734][    T0]  cpu_startup_entry+0x14/0x20
[   93.750477][    T0]  start_secondary+0x169/0x1b0
[   93.755219][    T0]  secondary_startup_64+0xa4/0xb0
[   93.761844][    T0] Kernel Offset: disabled
[   93.766298][    T0] Rebooting in 86400 seconds..