[  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 '10.128.0.84' (ECDSA) to the list of known hosts.
2020/05/06 05:43:31 fuzzer started
2020/05/06 05:43:31 dialing manager at 10.128.0.105:40525
2020/05/06 05:43:31 syscalls: 2965
2020/05/06 05:43:31 code coverage: enabled
2020/05/06 05:43:31 comparison tracing: enabled
2020/05/06 05:43:31 extra coverage: enabled
2020/05/06 05:43:31 setuid sandbox: enabled
2020/05/06 05:43:31 namespace sandbox: enabled
2020/05/06 05:43:31 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/06 05:43:31 fault injection: enabled
2020/05/06 05:43:31 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/06 05:43:31 net packet injection: enabled
2020/05/06 05:43:31 net device setup: enabled
2020/05/06 05:43:31 concurrency sanitizer: enabled
2020/05/06 05:43:31 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/06 05:43:31 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   43.335542][ T6727] KCSAN: could not find function: '_find_next_bit'
[   46.155154][ T6727] KCSAN: could not find function: 'poll_schedule_timeout'
2020/05/06 05:43:35 adding functions to KCSAN blacklist: 'do_signal_stop' 'copy_process' 'tick_sched_do_timer' 'generic_fillattr' 'echo_char' 'find_get_pages_range_tag' '_find_next_bit' 'ext4_free_inodes_count' 'ext4_mark_iloc_dirty' 'iptunnel_xmit' 'pcpu_alloc' 'generic_write_end' 'do_nanosleep' '__x64_sys_ptrace' 'futex_wait_queue_me' '__ext4_new_inode' 'mod_timer' 'page_counter_charge' 'get_cpu_iowait_time_us' 'add_timer' '__snd_rawmidi_transmit_ack' 'vm_area_dup' 'lruvec_lru_size' 'xas_clear_mark' 'ktime_get_real_seconds' 'blk_mq_sched_dispatch_requests' 'io_sq_thread' 'blk_mq_dispatch_rq_list' 'poll_schedule_timeout' '__find_get_block' 'kauditd_thread' 'run_timer_softirq' '__bpf_lru_node_move_in' 'wbt_issue' 'ep_poll' 'yama_ptracer_del' 
[  243.277708][    T0] ==================================================================
[  243.286282][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  243.295185][    T0] 
[  243.297502][    T0] write to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[  243.304855][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  243.310381][    T0]  do_idle+0x1ad/0x290
[  243.314421][    T0]  cpu_startup_entry+0x14/0x20
[  243.319206][    T0]  start_secondary+0x169/0x1b0
[  243.324814][    T0]  secondary_startup_64+0xa4/0xb0
[  243.329804][    T0] 
[  243.332108][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  243.339370][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  243.344893][    T0]  do_idle+0x1ad/0x290
[  243.348934][    T0]  cpu_startup_entry+0x14/0x20
[  243.353700][    T0]  rest_init+0xe4/0xeb
[  243.357757][    T0]  arch_call_rest_init+0x13/0x2b
[  243.362676][    T0]  start_kernel+0x82d/0x852
[  243.367175][    T0]  secondary_startup_64+0xa4/0xb0
[  243.372168][    T0] 
[  243.374480][    T0] Reported by Kernel Concurrency Sanitizer on:
[  243.380608][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  243.388503][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  243.399164][    T0] ==================================================================
[  243.407267][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  243.413893][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  243.421753][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  243.431877][    T0] Call Trace:
[  243.435156][    T0]  dump_stack+0x11d/0x187
[  243.439470][    T0]  panic+0x210/0x640
[  243.443353][    T0]  ? vprintk_func+0x89/0x13a
[  243.447922][    T0]  kcsan_report.cold+0xc/0x1a
[  243.452644][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  243.457993][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  243.463525][    T0]  do_idle+0x1ad/0x290
[  243.467567][    T0]  ? do_idle+0xe0/0x290
[  243.471701][    T0]  cpu_startup_entry+0x14/0x20
[  243.476450][    T0]  rest_init+0xe4/0xeb
[  243.480514][    T0]  arch_call_rest_init+0x13/0x2b
[  243.485436][    T0]  start_kernel+0x82d/0x852
[  243.489942][    T0]  secondary_startup_64+0xa4/0xb0
[  243.497191][    T0] Kernel Offset: disabled
[  243.501661][    T0] Rebooting in 86400 seconds..