[info] Using makefile-style concurrent boot in runlevel 2.
[   48.045154][   T27] audit: type=1800 audit(1582373223.077:21): pid=7757 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   48.098807][   T27] audit: type=1800 audit(1582373223.077:22): pid=7757 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] 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 '10.128.0.83' (ECDSA) to the list of known hosts.
2020/02/22 12:07:14 fuzzer started
2020/02/22 12:07:16 dialing manager at 10.128.0.105:34425
2020/02/22 12:07:16 syscalls: 2955
2020/02/22 12:07:16 code coverage: enabled
2020/02/22 12:07:16 comparison tracing: enabled
2020/02/22 12:07:16 extra coverage: enabled
2020/02/22 12:07:16 setuid sandbox: enabled
2020/02/22 12:07:16 namespace sandbox: enabled
2020/02/22 12:07:16 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/22 12:07:16 fault injection: enabled
2020/02/22 12:07:16 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/22 12:07:16 net packet injection: enabled
2020/02/22 12:07:16 net device setup: enabled
2020/02/22 12:07:16 concurrency sanitizer: enabled
2020/02/22 12:07:16 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/02/22 12:07:16 adding functions to KCSAN blacklist: 'ep_poll' '__ext4_new_inode' 'generic_write_end' 'find_get_pages_range_tag' 'wbt_done' 'generic_fillattr' 
syzkaller login: [   73.840273][    T0] ==================================================================
[   73.848436][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   73.856925][    T0] 
[   73.859250][    T0] write to 0xffffffff85f05590 of 4 bytes by interrupt on cpu 1:
[   73.866891][    T0]  tick_sched_do_timer+0xc0/0xe0
[   73.871848][    T0]  tick_sched_timer+0x43/0xe0
[   73.876554][    T0]  __hrtimer_run_queues+0x274/0x5f0
[   73.881765][    T0]  hrtimer_interrupt+0x22a/0x480
[   73.886715][    T0]  smp_apic_timer_interrupt+0xdc/0x280
[   73.892185][    T0]  apic_timer_interrupt+0xf/0x20
[   73.897103][    T0] 
[   73.899463][    T0] read to 0xffffffff85f05590 of 4 bytes by task 0 on cpu 0:
[   73.906735][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   73.912264][    T0]  do_idle+0x1b8/0x290
[   73.916316][    T0]  cpu_startup_entry+0x1b/0x20
[   73.921075][    T0]  rest_init+0xec/0xf6
[   73.925160][    T0]  arch_call_rest_init+0x17/0x37
[   73.930106][    T0]  start_kernel+0xcd4/0xcfc
[   73.934695][    T0]  x86_64_start_reservations+0x29/0x2b
[   73.940145][    T0]  x86_64_start_kernel+0x72/0x76
[   73.945087][    T0]  secondary_startup_64+0xa4/0xb0
[   73.950086][    T0] 
[   73.952394][    T0] Reported by Kernel Concurrency Sanitizer on:
[   73.958538][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   73.966428][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.976526][    T0] ==================================================================
[   73.984620][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   73.991236][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   73.999107][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   74.009168][    T0] Call Trace:
[   74.012465][    T0]  dump_stack+0x11d/0x181
[   74.016817][    T0]  panic+0x210/0x640
[   74.020733][    T0]  ? vprintk_func+0x8d/0x140
[   74.025330][    T0]  kcsan_report.cold+0xc/0x1a
[   74.030029][    T0]  kcsan_setup_watchpoint+0x307/0x400
[   74.035437][    T0]  __tsan_read4+0xc6/0x100
[   74.039871][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   74.045433][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   74.051680][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   74.057941][    T0]  do_idle+0x1b8/0x290
[   74.062035][    T0]  cpu_startup_entry+0x1b/0x20
[   74.066814][    T0]  rest_init+0xec/0xf6
[   74.070930][    T0]  arch_call_rest_init+0x17/0x37
[   74.075864][    T0]  start_kernel+0xcd4/0xcfc
[   74.080382][    T0]  x86_64_start_reservations+0x29/0x2b
[   74.085833][    T0]  x86_64_start_kernel+0x72/0x76
[   74.090775][    T0]  secondary_startup_64+0xa4/0xb0
[   74.096746][    T0] Kernel Offset: disabled
[   74.101067][    T0] Rebooting in 86400 seconds..