[  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 '10.128.1.40' (ECDSA) to the list of known hosts.
2020/05/19 12:10:26 fuzzer started
2020/05/19 12:10:26 dialing manager at 10.128.0.105:39959
2020/05/19 12:10:36 syscalls: 3055
2020/05/19 12:10:36 code coverage: enabled
2020/05/19 12:10:36 comparison tracing: enabled
2020/05/19 12:10:36 extra coverage: enabled
2020/05/19 12:10:36 setuid sandbox: enabled
2020/05/19 12:10:36 namespace sandbox: enabled
2020/05/19 12:10:36 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/19 12:10:36 fault injection: enabled
2020/05/19 12:10:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/19 12:10:36 net packet injection: enabled
2020/05/19 12:10:36 net device setup: enabled
2020/05/19 12:10:36 concurrency sanitizer: enabled
2020/05/19 12:10:36 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/19 12:10:36 USB emulation: enabled
syzkaller login: [   63.335041][ T8896] KCSAN: could not find function: '_find_next_bit'
2020/05/19 12:10:39 adding functions to KCSAN blacklist: '__perf_event_overflow' '__snd_rawmidi_transmit_ack' 'find_get_pages_range_tag' 'generic_write_end' 'pcpu_alloc' 'get_cpu_idle_time_us' 'copy_process' 'generic_fillattr' 'page_counter_charge' '_find_next_bit' 'ext4_mark_iloc_dirty' 'kauditd_thread' 'ep_poll' 'do_nanosleep' 'alloc_pid' 'vfs_readlink' '__rb_erase_color' '__ext4_new_inode' 'xas_clear_mark' 'blk_mq_sched_dispatch_requests' 'wbt_done' '__filemap_fdatawrite_range' 
[   94.606314][    T0] ==================================================================
[   94.615268][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   94.623536][    T0] 
[   94.625867][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   94.634465][    T0]  tick_sched_do_timer+0xb4/0xd0
[   94.639492][    T0]  tick_sched_timer+0x3f/0xd0
[   94.644166][    T0]  __hrtimer_run_queues+0x271/0x600
[   94.649358][    T0]  hrtimer_interrupt+0x226/0x490
[   94.655361][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   94.660918][    T0]  apic_timer_interrupt+0xf/0x20
[   94.665919][    T0]  native_safe_halt+0xe/0x10
[   94.670630][    T0]  default_idle+0x21/0x170
[   94.676543][    T0]  do_idle+0x1b7/0x290
[   94.681507][    T0]  cpu_startup_entry+0x14/0x20
[   94.686279][    T0]  rest_init+0xe4/0xeb
[   94.690372][    T0]  arch_call_rest_init+0x13/0x2b
[   94.695907][    T0]  start_kernel+0x7fe/0x823
[   94.700563][    T0]  secondary_startup_64+0xa4/0xb0
[   94.705572][    T0] 
[   94.707910][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   94.715353][    T0]  tick_nohz_next_event+0x181/0x340
[   94.720724][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   94.726305][    T0]  do_idle+0x1ad/0x290
[   94.730487][    T0]  cpu_startup_entry+0x14/0x20
[   94.735404][    T0]  start_secondary+0x169/0x1b0
[   94.740339][    T0]  secondary_startup_64+0xa4/0xb0
[   94.745346][    T0] 
[   94.747668][    T0] Reported by Kernel Concurrency Sanitizer on:
[   94.753910][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   94.762170][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.773860][    T0] ==================================================================
[   94.782310][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   94.789247][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   94.797816][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.807936][    T0] Call Trace:
[   94.811212][    T0]  dump_stack+0x11d/0x187
[   94.815630][    T0]  panic+0x210/0x640
[   94.819520][    T0]  ? vprintk_func+0x89/0x13a
[   94.824089][    T0]  kcsan_report.cold+0xc/0x1a
[   94.828753][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   94.834652][    T0]  tick_nohz_next_event+0x181/0x340
[   94.839883][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   94.845430][    T0]  ? ktime_get+0x1c9/0x210
[   94.849840][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   94.855373][    T0]  do_idle+0x1ad/0x290
[   94.859435][    T0]  cpu_startup_entry+0x14/0x20
[   94.864178][    T0]  start_secondary+0x169/0x1b0
[   94.868925][    T0]  secondary_startup_64+0xa4/0xb0
[   94.875667][    T0] Kernel Offset: disabled
[   94.880007][    T0] Rebooting in 86400 seconds..