[  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 '10.128.0.197' (ECDSA) to the list of known hosts.
2020/06/09 00:31:10 fuzzer started
2020/06/09 00:31:10 dialing manager at 10.128.0.105:32965
2020/06/09 00:31:11 syscalls: 3055
2020/06/09 00:31:11 code coverage: enabled
2020/06/09 00:31:11 comparison tracing: enabled
2020/06/09 00:31:11 extra coverage: enabled
2020/06/09 00:31:11 setuid sandbox: enabled
2020/06/09 00:31:11 namespace sandbox: enabled
2020/06/09 00:31:11 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/09 00:31:11 fault injection: enabled
2020/06/09 00:31:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/09 00:31:11 net packet injection: enabled
2020/06/09 00:31:11 net device setup: enabled
2020/06/09 00:31:11 concurrency sanitizer: enabled
2020/06/09 00:31:11 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/09 00:31:11 USB emulation: enabled
syzkaller login: [   53.234493][ T8919] KCSAN: could not find function: '_find_next_bit'
2020/06/09 00:31:13 adding functions to KCSAN blacklist: 'find_get_pages_range_tag' 'mod_timer' 'generic_fillattr' 'run_timer_softirq' 'file_update_time' 'copy_process' 'blk_mq_sched_dispatch_requests' 'do_nanosleep' 'alloc_pid' 'ext4_mark_iloc_dirty' '_find_next_bit' 'futex_wait_queue_me' 'page_counter_charge' 'xas_find_marked' 'tick_nohz_idle_stop_tick' 'do_signal_stop' 'complete_signal' 'ep_poll' 'generic_write_end' 'pcpu_alloc' '__ext4_new_inode' 
[   88.540990][    T0] ==================================================================
[   88.549230][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   88.557372][    T0] 
[   88.559704][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   88.567339][    T0]  tick_sched_do_timer+0xb4/0xd0
[   88.572283][    T0]  tick_sched_timer+0x3f/0xd0
[   88.576960][    T0]  __hrtimer_run_queues+0x271/0x600
[   88.582169][    T0]  hrtimer_interrupt+0x226/0x490
[   88.587218][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   88.592697][    T0]  apic_timer_interrupt+0xf/0x20
[   88.597600][    T0] 
[   88.599906][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   88.607176][    T0]  tick_nohz_next_event+0x181/0x340
[   88.612476][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   88.618199][    T0]  do_idle+0x1ad/0x290
[   88.622256][    T0]  cpu_startup_entry+0x14/0x20
[   88.627008][    T0]  start_secondary+0x169/0x1b0
[   88.631749][    T0]  secondary_startup_64+0xa4/0xb0
[   88.636740][    T0] 
[   88.639044][    T0] Reported by Kernel Concurrency Sanitizer on:
[   88.645173][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   88.653033][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   88.663170][    T0] ==================================================================
[   88.671203][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   88.677876][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   88.685741][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   88.695790][    T0] Call Trace:
[   88.699065][    T0]  dump_stack+0x11d/0x187
[   88.703374][    T0]  panic+0x210/0x640
[   88.707246][    T0]  ? vprintk_func+0x89/0x13a
[   88.711813][    T0]  kcsan_report.cold+0xc/0x1a
[   88.716533][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   88.721912][    T0]  tick_nohz_next_event+0x181/0x340
[   88.727114][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   88.732637][    T0]  ? ktime_get+0x1c9/0x210
[   88.737042][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   88.742749][    T0]  do_idle+0x1ad/0x290
[   88.746807][    T0]  cpu_startup_entry+0x14/0x20
[   88.751560][    T0]  start_secondary+0x169/0x1b0
[   88.756304][    T0]  secondary_startup_64+0xa4/0xb0
[   88.763007][    T0] Kernel Offset: disabled
[   88.767336][    T0] Rebooting in 86400 seconds..