[  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 '10.128.0.255' (ECDSA) to the list of known hosts.
2020/05/18 23:21:32 fuzzer started
2020/05/18 23:21:32 dialing manager at 10.128.0.105:34165
2020/05/18 23:21:43 syscalls: 3055
2020/05/18 23:21:43 code coverage: enabled
2020/05/18 23:21:43 comparison tracing: enabled
2020/05/18 23:21:43 extra coverage: enabled
2020/05/18 23:21:43 setuid sandbox: enabled
2020/05/18 23:21:43 namespace sandbox: enabled
2020/05/18 23:21:43 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/18 23:21:43 fault injection: enabled
2020/05/18 23:21:43 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/18 23:21:43 net packet injection: enabled
2020/05/18 23:21:43 net device setup: enabled
2020/05/18 23:21:43 concurrency sanitizer: enabled
2020/05/18 23:21:43 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/18 23:21:43 USB emulation: enabled
syzkaller login: [   63.018134][ T8902] KCSAN: could not find function: '_find_next_bit'
2020/05/18 23:21:45 adding functions to KCSAN blacklist: 'tick_sched_do_timer' 'echo_char' 'mod_timer' 'rds_cong_map_updated' 'do_exit' 'page_counter_charge' 'generic_fillattr' '_find_next_bit' '__ext4_new_inode' 'find_get_pages_range_tag' 'xas_clear_mark' 'run_timer_softirq' 'kauditd_thread' '__mpage_writepage' 'generic_write_end' 'ep_poll' 'copy_process' 'wbt_done' 
[   89.906095][    T0] ==================================================================
[   89.914257][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   89.922828][    T0] 
[   89.925158][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   89.932534][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   89.938071][    T0]  do_idle+0x1ad/0x290
[   89.942129][    T0]  cpu_startup_entry+0x14/0x20
[   89.946885][    T0]  rest_init+0xe4/0xeb
[   89.950949][    T0]  arch_call_rest_init+0x13/0x2b
[   89.955893][    T0]  start_kernel+0x7fe/0x823
[   89.960399][    T0]  secondary_startup_64+0xa4/0xb0
[   89.965405][    T0] 
[   89.967728][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   89.975014][    T0]  tick_nohz_next_event+0x181/0x340
[   89.980204][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   89.985728][    T0]  do_idle+0x1ad/0x290
[   89.989788][    T0]  cpu_startup_entry+0x14/0x20
[   89.994542][    T0]  start_secondary+0x169/0x1b0
[   89.999312][    T0]  secondary_startup_64+0xa4/0xb0
[   90.004313][    T0] 
[   90.006630][    T0] Reported by Kernel Concurrency Sanitizer on:
[   90.012784][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   90.020664][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   90.030710][    T0] ==================================================================
[   90.038757][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   90.045336][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   90.053204][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   90.063243][    T0] Call Trace:
[   90.066529][    T0]  dump_stack+0x11d/0x187
[   90.070867][    T0]  panic+0x210/0x640
[   90.074750][    T0]  ? vprintk_func+0x89/0x13a
[   90.079324][    T0]  kcsan_report.cold+0xc/0x1a
[   90.083985][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   90.089344][    T0]  tick_nohz_next_event+0x181/0x340
[   90.094525][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   90.100054][    T0]  ? ktime_get+0x1c9/0x210
[   90.104445][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   90.109881][    T0]  do_idle+0x1ad/0x290
[   90.113924][    T0]  ? do_idle+0xe0/0x290
[   90.118058][    T0]  cpu_startup_entry+0x14/0x20
[   90.122797][    T0]  start_secondary+0x169/0x1b0
[   90.127548][    T0]  secondary_startup_64+0xa4/0xb0
[   90.134008][    T0] Kernel Offset: disabled
[   90.138324][    T0] Rebooting in 86400 seconds..