[  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 '10.128.0.72' (ECDSA) to the list of known hosts.
2020/05/09 00:43:04 fuzzer started
2020/05/09 00:43:05 dialing manager at 10.128.0.105:44373
2020/05/09 00:43:05 syscalls: 3055
2020/05/09 00:43:05 code coverage: enabled
2020/05/09 00:43:05 comparison tracing: enabled
2020/05/09 00:43:05 extra coverage: enabled
2020/05/09 00:43:05 setuid sandbox: enabled
2020/05/09 00:43:05 namespace sandbox: enabled
2020/05/09 00:43:05 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/09 00:43:05 fault injection: enabled
2020/05/09 00:43:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/09 00:43:05 net packet injection: enabled
2020/05/09 00:43:05 net device setup: enabled
2020/05/09 00:43:05 concurrency sanitizer: enabled
2020/05/09 00:43:05 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/09 00:43:05 USB emulation: enabled
2020/05/09 00:43:08 adding functions to KCSAN blacklist: 'generic_fillattr' 'page_counter_charge' 'pcpu_alloc' 'do_signal_stop' 'echo_char' 'mod_timer' 'blk_mq_dispatch_rq_list' 'file_remove_privs' '__ext4_new_inode' 'kauditd_thread' 'ext4_mb_good_group' 'copy_process' 'io_sq_thread' 'atime_needs_update' 'decrypt_packet' 'generic_write_end' 'kcm_rfree' 'xas_clear_mark' '__mark_inode_dirty' 'run_timer_softirq' 'ep_poll' 'find_get_pages_range_tag' 'blk_mq_sched_dispatch_requests' 'ext4_free_inodes_count' '__add_to_page_cache_locked' 'shmem_file_read_iter' 'ext4_writepages' 'blk_mq_get_request' 'tick_sched_do_timer' '_find_next_bit' 
syzkaller login: [   52.000583][ T8932] KCSAN: could not find function: '_find_next_bit'
[  190.531989][    T0] ==================================================================
[  190.540774][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  190.549689][    T0] 
[  190.552481][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  190.560037][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  190.565901][    T0]  do_idle+0x1ad/0x290
[  190.570048][    T0]  cpu_startup_entry+0x14/0x20
[  190.576206][    T0]  start_secondary+0x169/0x1b0
[  190.581246][    T0]  secondary_startup_64+0xa4/0xb0
[  190.586474][    T0] 
[  190.588792][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[  190.596331][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  190.602019][    T0]  do_idle+0x1ad/0x290
[  190.606200][    T0]  cpu_startup_entry+0x14/0x20
[  190.611015][    T0]  rest_init+0xe4/0xeb
[  190.615081][    T0]  arch_call_rest_init+0x13/0x2b
[  190.620329][    T0]  start_kernel+0x7fe/0x823
[  190.625040][    T0]  secondary_startup_64+0xa4/0xb0
[  190.630062][    T0] 
[  190.632473][    T0] Reported by Kernel Concurrency Sanitizer on:
[  190.638795][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  190.646800][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  190.656866][    T0] ==================================================================
[  190.665037][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  190.671665][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  190.679807][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  190.690088][    T0] Call Trace:
[  190.693569][    T0]  dump_stack+0x11d/0x187
[  190.698057][    T0]  panic+0x210/0x640
[  190.701951][    T0]  ? vprintk_func+0x89/0x13a
[  190.707016][    T0]  kcsan_report.cold+0xc/0x1a
[  190.711809][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  190.717320][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  190.722868][    T0]  do_idle+0x1ad/0x290
[  190.726924][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  190.732377][    T0]  cpu_startup_entry+0x14/0x20
[  190.737133][    T0]  rest_init+0xe4/0xeb
[  190.741281][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[  190.747513][    T0]  arch_call_rest_init+0x13/0x2b
[  190.752528][    T0]  start_kernel+0x7fe/0x823
[  190.757182][    T0]  secondary_startup_64+0xa4/0xb0
[  190.764136][    T0] Kernel Offset: disabled
[  190.768730][    T0] Rebooting in 86400 seconds..