[   51.464094][   T26] audit: type=1800 audit(1573095815.902:27): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[   51.484560][   T26] audit: type=1800 audit(1573095815.912:28): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 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.
[   52.089163][   T26] audit: type=1800 audit(1573095816.592:29): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0
[   52.113000][   T26] audit: type=1800 audit(1573095816.592:30): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.1.14' (ECDSA) to the list of known hosts.
2019/11/07 03:03:47 fuzzer started
2019/11/07 03:03:49 dialing manager at 10.128.0.105:34849
2019/11/07 03:03:49 syscalls: 2553
2019/11/07 03:03:49 code coverage: enabled
2019/11/07 03:03:49 comparison tracing: enabled
2019/11/07 03:03:49 extra coverage: extra coverage is not supported by the kernel
2019/11/07 03:03:49 setuid sandbox: enabled
2019/11/07 03:03:49 namespace sandbox: enabled
2019/11/07 03:03:49 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/07 03:03:49 fault injection: enabled
2019/11/07 03:03:49 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/07 03:03:49 net packet injection: enabled
2019/11/07 03:03:49 net device setup: enabled
2019/11/07 03:03:49 concurrency sanitizer: enabled
2019/11/07 03:03:49 devlink PCI setup: PCI device 0000:00:10.0 is not available
2019/11/07 03:03:51 adding functions to KCSAN blacklist: 'generic_permission' 'taskstats_exit' 'tomoyo_supervisor' 'run_timer_softirq' 'tcp_add_backlog' '__hrtimer_run_queues' 'ktime_get_real_seconds' 'find_next_bit' 'blk_mq_dispatch_rq_list' 'tick_do_update_jiffies64' 'ext4_free_inode' 'do_nanosleep' 'audit_log_start' 'pid_update_inode' 'echo_char' 'ep_poll' 
syzkaller login: [   73.804675][    T0] ==================================================================
[   73.812812][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   73.821725][    T0] 
[   73.824047][    T0] write to 0xffffffff85cb26d0 of 4 bytes by task 0 on cpu 1:
[   73.831496][    T0]  tick_nohz_idle_stop_tick+0x525/0x670
[   73.837041][    T0]  do_idle+0x1a5/0x280
[   73.841090][    T0]  cpu_startup_entry+0x1b/0x20
[   73.845836][    T0]  start_secondary+0x208/0x260
[   73.850594][    T0]  secondary_startup_64+0xa4/0xb0
[   73.855596][    T0] 
[   73.857908][    T0] read to 0xffffffff85cb26d0 of 4 bytes by task 0 on cpu 0:
[   73.867605][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   73.873492][    T0]  do_idle+0x1a5/0x280
[   73.877561][    T0]  cpu_startup_entry+0x1b/0x20
[   73.882741][    T0]  rest_init+0xec/0xf6
[   73.886797][    T0]  arch_call_rest_init+0x17/0x37
[   73.891718][    T0]  start_kernel+0x838/0x85e
[   73.896203][    T0]  x86_64_start_reservations+0x29/0x2b
[   73.901654][    T0]  x86_64_start_kernel+0x72/0x76
[   73.906573][    T0]  secondary_startup_64+0xa4/0xb0
[   73.911578][    T0] 
[   73.913901][    T0] Reported by Kernel Concurrency Sanitizer on:
[   73.920045][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0
[   73.927132][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.937173][    T0] ==================================================================
[   73.945221][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   73.951796][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0
[   73.958885][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.968938][    T0] Call Trace:
[   73.972228][    T0]  dump_stack+0xf5/0x159
[   73.976476][    T0]  panic+0x210/0x640
[   73.980364][    T0]  ? vprintk_func+0x8d/0x140
[   73.984947][    T0]  kcsan_report.cold+0xc/0xe
[   73.989524][    T0]  kcsan_setup_watchpoint+0x3fe/0x410
[   73.994882][    T0]  __tsan_read4+0x145/0x1f0
[   73.999375][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   74.004907][    T0]  ? debug_smp_processor_id+0x4c/0x172
[   74.010352][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   74.016578][    T0]  do_idle+0x1a5/0x280
[   74.020633][    T0]  cpu_startup_entry+0x1b/0x20
[   74.025382][    T0]  rest_init+0xec/0xf6
[   74.029435][    T0]  ? trace_event_define_fields_vector_free_moved+0xce/0xce
[   74.036615][    T0]  arch_call_rest_init+0x17/0x37
[   74.041549][    T0]  start_kernel+0x838/0x85e
[   74.046053][    T0]  x86_64_start_reservations+0x29/0x2b
[   74.051511][    T0]  x86_64_start_kernel+0x72/0x76
[   74.056439][    T0]  secondary_startup_64+0xa4/0xb0
[   74.062756][    T0] Kernel Offset: disabled
[   74.067089][    T0] Rebooting in 86400 seconds..