[  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.
[   41.190283][ T8615] sshd (8615) used greatest stack depth: 10864 bytes left


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts.
2020/06/16 23:11:45 fuzzer started
2020/06/16 23:11:45 dialing manager at 10.128.0.105:33867
2020/06/16 23:11:46 syscalls: 3085
2020/06/16 23:11:46 code coverage: enabled
2020/06/16 23:11:46 comparison tracing: enabled
2020/06/16 23:11:46 extra coverage: enabled
2020/06/16 23:11:46 setuid sandbox: enabled
2020/06/16 23:11:46 namespace sandbox: enabled
2020/06/16 23:11:46 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/16 23:11:46 fault injection: enabled
2020/06/16 23:11:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/16 23:11:46 net packet injection: enabled
2020/06/16 23:11:46 net device setup: enabled
2020/06/16 23:11:46 concurrency sanitizer: enabled
2020/06/16 23:11:46 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/16 23:11:46 USB emulation: enabled
2020/06/16 23:11:47 suppressing KCSAN reports in functions: 'find_get_pages_range_tag' 'copy_process' 'blk_mq_get_request' 'generic_write_end' 'complete_signal' 'ep_poll' 'generic_fillattr' '__ext4_new_inode' '__send_signal' 'add_timer' 'alloc_pid' 'ptrace_check_attach' 
syzkaller login: [   52.622907][    T0] ==================================================================
[   52.631401][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   52.639969][    T0] 
[   52.642419][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   52.650405][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   52.656032][    T0]  do_idle+0x1ad/0x290
[   52.660104][    T0]  cpu_startup_entry+0x14/0x20
[   52.665091][    T0]  start_secondary+0x169/0x1b0
[   52.669874][    T0]  secondary_startup_64+0xa4/0xb0
[   52.674995][    T0] 
[   52.677318][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   52.684589][    T0]  tick_nohz_next_event+0x181/0x340
[   52.689782][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   52.695312][    T0]  do_idle+0x1ad/0x290
[   52.699390][    T0]  cpu_startup_entry+0x14/0x20
[   52.704167][    T0]  rest_init+0xe4/0xeb
[   52.708260][    T0]  arch_call_rest_init+0x13/0x2b
[   52.713196][    T0]  start_kernel+0x7fe/0x823
[   52.717716][    T0]  secondary_startup_64+0xa4/0xb0
[   52.722720][    T0] 
[   52.725035][    T0] Reported by Kernel Concurrency Sanitizer on:
[   52.731177][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   52.739149][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.749339][    T0] ==================================================================
[   52.757400][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   52.763980][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   52.771846][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.781883][    T0] Call Trace:
[   52.785181][    T0]  dump_stack+0x11d/0x187
[   52.789528][    T0]  panic+0x210/0x640
[   52.793508][    T0]  ? vprintk_func+0x89/0x13a
[   52.798079][    T0]  kcsan_report.cold+0xc/0x1a
[   52.802769][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   52.808141][    T0]  tick_nohz_next_event+0x181/0x340
[   52.813356][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   52.818981][    T0]  ? ktime_get+0x1c9/0x210
[   52.823379][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   52.828833][    T0]  do_idle+0x1ad/0x290
[   52.832911][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   52.838351][    T0]  cpu_startup_entry+0x14/0x20
[   52.843101][    T0]  rest_init+0xe4/0xeb
[   52.847166][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   52.853838][    T0]  arch_call_rest_init+0x13/0x2b
[   52.858982][    T0]  start_kernel+0x7fe/0x823
[   52.863480][    T0]  secondary_startup_64+0xa4/0xb0
[   52.870394][    T0] Kernel Offset: disabled
[   52.874726][    T0] Rebooting in 86400 seconds..