[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   34.930513][   T25] audit: type=1800 audit(1570477550.932:25): pid=7097 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[   34.978250][   T25] audit: type=1800 audit(1570477550.932:26): pid=7097 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[   34.998672][   T25] audit: type=1800 audit(1570477550.932:27): pid=7097 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts.
2019/10/07 19:45:59 fuzzer started
2019/10/07 19:46:00 dialing manager at 10.128.0.105:39369
2019/10/07 19:46:00 syscalls: 2523
2019/10/07 19:46:00 code coverage: enabled
2019/10/07 19:46:00 comparison tracing: enabled
2019/10/07 19:46:00 extra coverage: extra coverage is not supported by the kernel
2019/10/07 19:46:00 setuid sandbox: enabled
2019/10/07 19:46:00 namespace sandbox: enabled
2019/10/07 19:46:00 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/07 19:46:00 fault injection: enabled
2019/10/07 19:46:00 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/07 19:46:00 net packet injection: enabled
2019/10/07 19:46:00 net device setup: enabled
2019/10/07 19:46:00 concurrency sanitizer: enabled
syzkaller login: [   44.690275][    T0] ==================================================================
[   44.698483][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   44.707059][    T0] 
[   44.709381][    T0] write to 0xffffffff85caf2d0 of 4 bytes by interrupt on cpu 1:
[   44.717034][    T0]  tick_sched_do_timer+0xc0/0xe0
[   44.721965][    T0]  tick_sched_timer+0x43/0xe0
[   44.726640][    T0]  __hrtimer_run_queues+0x288/0x600
[   44.731844][    T0]  hrtimer_interrupt+0x22a/0x480
[   44.736773][    T0]  smp_apic_timer_interrupt+0xdc/0x280
[   44.742214][    T0]  apic_timer_interrupt+0xf/0x20
[   44.747125][    T0] 
[   44.749456][    T0] read to 0xffffffff85caf2d0 of 4 bytes by task 0 on cpu 0:
[   44.756803][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   44.762346][    T0]  do_idle+0x1e0/0x2c0
[   44.766402][    T0]  cpu_startup_entry+0x1b/0x20
[   44.771333][    T0]  rest_init+0xec/0xf6
[   44.775395][    T0]  arch_call_rest_init+0x17/0x37
[   44.780338][    T0]  start_kernel+0x83e/0x864
[   44.784947][    T0]  x86_64_start_reservations+0x29/0x2b
[   44.790393][    T0]  x86_64_start_kernel+0x72/0x76
[   44.795329][    T0]  secondary_startup_64+0xa4/0xb0
[   44.800347][    T0] 
[   44.802682][    T0] Reported by Kernel Concurrency Sanitizer on:
[   44.808835][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0
[   44.815584][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.825620][    T0] ==================================================================
[   44.833671][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   44.840253][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0
[   44.846993][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.857038][    T0] Call Trace:
[   44.860325][    T0]  dump_stack+0xf5/0x159
[   44.864567][    T0]  panic+0x209/0x639
[   44.868470][    T0]  ? vprintk_func+0x8d/0x140
[   44.873061][    T0]  kcsan_report.cold+0x57/0xeb
[   44.877817][    T0]  __kcsan_setup_watchpoint+0x342/0x500
[   44.883344][    T0]  __tsan_read4+0x2c/0x30
[   44.887657][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   44.893185][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   44.899415][    T0]  do_idle+0x1e0/0x2c0
[   44.903479][    T0]  cpu_startup_entry+0x1b/0x20
[   44.908222][    T0]  rest_init+0xec/0xf6
[   44.912283][    T0]  ? trace_event_define_fields_vector_free_moved+0xce/0xce
[   44.919477][    T0]  arch_call_rest_init+0x17/0x37
[   44.924410][    T0]  start_kernel+0x83e/0x864
[   44.928906][    T0]  x86_64_start_reservations+0x29/0x2b
[   44.934350][    T0]  x86_64_start_kernel+0x72/0x76
[   44.939283][    T0]  secondary_startup_64+0xa4/0xb0
[   44.945843][    T0] Kernel Offset: disabled
[   44.950192][    T0] Rebooting in 86400 seconds..