[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   39.527391][   T25] audit: type=1800 audit(1570656777.538:25): pid=7067 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[   39.562545][   T25] audit: type=1800 audit(1570656777.538:26): pid=7067 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[   39.582774][   T25] audit: type=1800 audit(1570656777.538:27): pid=7067 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 '10.128.1.62' (ECDSA) to the list of known hosts.
2019/10/09 21:33:04 fuzzer started
2019/10/09 21:33:05 dialing manager at 10.128.0.105:43471
2019/10/09 21:33:05 syscalls: 2523
2019/10/09 21:33:05 code coverage: enabled
2019/10/09 21:33:05 comparison tracing: enabled
2019/10/09 21:33:05 extra coverage: extra coverage is not supported by the kernel
2019/10/09 21:33:05 setuid sandbox: enabled
2019/10/09 21:33:05 namespace sandbox: enabled
2019/10/09 21:33:05 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/09 21:33:05 fault injection: enabled
2019/10/09 21:33:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/09 21:33:05 net packet injection: enabled
2019/10/09 21:33:05 net device setup: enabled
2019/10/09 21:33:05 concurrency sanitizer: enabled
syzkaller login: [   48.017623][    T0] ==================================================================
[   48.025929][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   48.034491][    T0] 
[   48.036799][    T0] write to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 0:
[   48.044152][    T0]  tick_nohz_idle_stop_tick+0x525/0x670
[   48.049793][    T0]  do_idle+0x1e0/0x2c0
[   48.053858][    T0]  cpu_startup_entry+0x1b/0x20
[   48.058607][    T0]  rest_init+0xec/0xf6
[   48.062662][    T0]  arch_call_rest_init+0x17/0x37
[   48.067584][    T0]  start_kernel+0x83e/0x864
[   48.072072][    T0]  x86_64_start_reservations+0x29/0x2b
[   48.077505][    T0]  x86_64_start_kernel+0x72/0x76
[   48.082416][    T0]  secondary_startup_64+0xa4/0xb0
[   48.087416][    T0] 
[   48.089725][    T0] read to 0xffffffff85caf310 of 4 bytes by task 0 on cpu 1:
[   48.096981][    T0]  tick_nohz_next_event+0x1a4/0x380
[   48.102158][    T0]  tick_nohz_idle_stop_tick+0x3c2/0x670
[   48.107677][    T0]  do_idle+0x1e0/0x2c0
[   48.111731][    T0]  cpu_startup_entry+0x1b/0x20
[   48.116482][    T0]  start_secondary+0x207/0x260
[   48.121221][    T0]  secondary_startup_64+0xa4/0xb0
[   48.126213][    T0] 
[   48.128516][    T0] Reported by Kernel Concurrency Sanitizer on:
[   48.134646][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[   48.141376][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.151406][    T0] ==================================================================
[   48.159458][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   48.166038][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[   48.173033][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.183065][    T0] Call Trace:
[   48.186335][    T0]  dump_stack+0xf5/0x159
[   48.190556][    T0]  panic+0x209/0x639
[   48.194430][    T0]  ? vprintk_func+0x8d/0x140
[   48.199010][    T0]  kcsan_report.cold+0xc/0x1b
[   48.203664][    T0]  __kcsan_setup_watchpoint+0x3ee/0x510
[   48.209186][    T0]  __tsan_read4+0x2c/0x30
[   48.213504][    T0]  tick_nohz_next_event+0x1a4/0x380
[   48.218697][    T0]  tick_nohz_idle_stop_tick+0x3c2/0x670
[   48.224227][    T0]  ? __tsan_read4+0x2c/0x30
[   48.228722][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   48.234951][    T0]  do_idle+0x1e0/0x2c0
[   48.239014][    T0]  ? complete+0x44/0x50
[   48.243146][    T0]  cpu_startup_entry+0x1b/0x20
[   48.247888][    T0]  start_secondary+0x207/0x260
[   48.252653][    T0]  secondary_startup_64+0xa4/0xb0
[   48.259003][    T0] Kernel Offset: disabled
[   48.263327][    T0] Rebooting in 86400 seconds..