[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   35.544122][   T25] audit: type=1800 audit(1570936630.913:25): pid=7038 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[   35.564126][   T25] audit: type=1800 audit(1570936630.913:26): pid=7038 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[   35.585018][   T25] audit: type=1800 audit(1570936630.913:27): pid=7038 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 '10.128.0.130' (ECDSA) to the list of known hosts.
2019/10/13 03:17:19 fuzzer started
2019/10/13 03:17:20 dialing manager at 10.128.0.105:43913
2019/10/13 03:17:20 syscalls: 2523
2019/10/13 03:17:20 code coverage: enabled
2019/10/13 03:17:20 comparison tracing: enabled
2019/10/13 03:17:20 extra coverage: extra coverage is not supported by the kernel
2019/10/13 03:17:20 setuid sandbox: enabled
2019/10/13 03:17:20 namespace sandbox: enabled
2019/10/13 03:17:20 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/13 03:17:20 fault injection: enabled
2019/10/13 03:17:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/13 03:17:20 net packet injection: enabled
2019/10/13 03:17:20 net device setup: enabled
2019/10/13 03:17:20 concurrency sanitizer: enabled
syzkaller login: [   46.192124][    T0] ==================================================================
[   46.200274][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   46.209027][    T0] 
[   46.211369][    T0] write to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 0:
[   46.218744][    T0]  tick_nohz_idle_stop_tick+0x525/0x670
[   46.224288][    T0]  do_idle+0x1e0/0x2c0
[   46.228349][    T0]  cpu_startup_entry+0x1b/0x20
[   46.233111][    T0]  rest_init+0xec/0xf6
[   46.237159][    T0]  arch_call_rest_init+0x17/0x37
[   46.242161][    T0]  start_kernel+0x83e/0x864
[   46.246648][    T0]  x86_64_start_reservations+0x29/0x2b
[   46.252104][    T0]  x86_64_start_kernel+0x72/0x76
[   46.257034][    T0]  secondary_startup_64+0xa4/0xb0
[   46.262085][    T0] 
[   46.264409][    T0] read to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 1:
[   46.271682][    T0]  tick_nohz_next_event+0x1a4/0x380
[   46.276860][    T0]  tick_nohz_idle_stop_tick+0x3c2/0x670
[   46.282398][    T0]  do_idle+0x1e0/0x2c0
[   46.286443][    T0]  cpu_startup_entry+0x1b/0x20
[   46.291184][    T0]  start_secondary+0x207/0x260
[   46.295933][    T0]  secondary_startup_64+0xa4/0xb0
[   46.300941][    T0] 
[   46.303242][    T0] Reported by Kernel Concurrency Sanitizer on:
[   46.309375][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[   46.316108][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.326138][    T0] ==================================================================
[   46.334752][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   46.341341][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[   46.348090][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.358124][    T0] Call Trace:
[   46.361484][    T0]  dump_stack+0xf5/0x159
[   46.365707][    T0]  panic+0x209/0x639
[   46.369595][    T0]  ? vprintk_func+0x8d/0x140
[   46.374184][    T0]  kcsan_report.cold+0xc/0x1b
[   46.378845][    T0]  __kcsan_setup_watchpoint+0x3ee/0x510
[   46.384369][    T0]  __tsan_read4+0x2c/0x30
[   46.388680][    T0]  tick_nohz_next_event+0x1a4/0x380
[   46.393861][    T0]  tick_nohz_idle_stop_tick+0x3c2/0x670
[   46.399408][    T0]  ? __tsan_read4+0x2c/0x30
[   46.403890][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   46.410123][    T0]  do_idle+0x1e0/0x2c0
[   46.414174][    T0]  ? complete+0x44/0x50
[   46.418311][    T0]  cpu_startup_entry+0x1b/0x20
[   46.423054][    T0]  start_secondary+0x207/0x260
[   46.427800][    T0]  secondary_startup_64+0xa4/0xb0
[   46.434150][    T0] Kernel Offset: disabled
[   46.438474][    T0] Rebooting in 86400 seconds..