[info] Using makefile-style concurrent boot in runlevel 2.
[   45.907837][   T26] audit: type=1800 audit(1583098400.935:21): pid=7565 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   45.953989][   T26] audit: type=1800 audit(1583098400.935:22): pid=7565 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 '10.128.0.159' (ECDSA) to the list of known hosts.
2020/03/01 21:33:33 fuzzer started
2020/03/01 21:33:35 dialing manager at 10.128.0.105:41315
2020/03/01 21:33:37 syscalls: 2955
2020/03/01 21:33:37 code coverage: enabled
2020/03/01 21:33:37 comparison tracing: enabled
2020/03/01 21:33:37 extra coverage: enabled
2020/03/01 21:33:37 setuid sandbox: enabled
2020/03/01 21:33:37 namespace sandbox: enabled
2020/03/01 21:33:37 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/01 21:33:37 fault injection: enabled
2020/03/01 21:33:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/01 21:33:37 net packet injection: enabled
2020/03/01 21:33:37 net device setup: enabled
2020/03/01 21:33:37 concurrency sanitizer: enabled
2020/03/01 21:33:37 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/03/01 21:33:38 adding functions to KCSAN blacklist: 'find_group_orlov' 'blk_mq_dispatch_rq_list' 'ep_poll' 'mod_timer' '__ext4_new_inode' 'generic_fillattr' 'file_update_time' 'xas_clear_mark' 'run_timer_softirq' 'find_get_pages_range_tag' 
syzkaller login: [   88.107391][    T0] ==================================================================
[   88.115574][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   88.123718][    T0] 
[   88.126047][    T0] write to 0xffffffff85d05610 of 4 bytes by interrupt on cpu 0:
[   88.133688][    T0]  tick_sched_do_timer+0xb4/0xd0
[   88.138635][    T0]  tick_sched_timer+0x3f/0xd0
[   88.143300][    T0]  __hrtimer_run_queues+0x271/0x600
[   88.148516][    T0]  hrtimer_interrupt+0x226/0x490
[   88.153458][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   88.159754][    T0]  apic_timer_interrupt+0xf/0x20
[   88.164679][    T0]  native_safe_halt+0xe/0x10
[   88.169289][    T0]  default_idle+0x21/0x170
[   88.174063][    T0]  do_idle+0x1b7/0x290
[   88.178142][    T0]  cpu_startup_entry+0x14/0x20
[   88.182911][    T0]  rest_init+0xe4/0xeb
[   88.186985][    T0]  arch_call_rest_init+0x13/0x2b
[   88.192600][    T0]  start_kernel+0xcc2/0xceb
[   88.197479][    T0]  secondary_startup_64+0xa4/0xb0
[   88.202492][    T0] 
[   88.204888][    T0] read to 0xffffffff85d05610 of 4 bytes by task 0 on cpu 1:
[   88.212345][    T0]  tick_nohz_next_event+0x192/0x350
[   88.217548][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   88.224916][    T0]  do_idle+0x1ad/0x290
[   88.228977][    T0]  cpu_startup_entry+0x14/0x20
[   88.233731][    T0]  start_secondary+0x164/0x1b0
[   88.238587][    T0]  secondary_startup_64+0xa4/0xb0
[   88.243635][    T0] 
[   88.245949][    T0] Reported by Kernel Concurrency Sanitizer on:
[   88.252193][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   88.260075][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   88.270143][    T0] ==================================================================
[   88.278380][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   88.285077][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   88.292972][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   88.303017][    T0] Call Trace:
[   88.306301][    T0]  dump_stack+0x11d/0x187
[   88.310643][    T0]  panic+0x210/0x640
[   88.314555][    T0]  ? vprintk_func+0x89/0x13a
[   88.319155][    T0]  kcsan_report.cold+0xc/0x14
[   88.323824][    T0]  kcsan_setup_watchpoint+0x304/0x400
[   88.329221][    T0]  tick_nohz_next_event+0x192/0x350
[   88.334512][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   88.340058][    T0]  ? rcu_dynticks_eqs_exit+0x2c/0x60
[   88.345329][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   88.350790][    T0]  do_idle+0x1ad/0x290
[   88.354869][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   88.360641][    T0]  cpu_startup_entry+0x14/0x20
[   88.365400][    T0]  start_secondary+0x164/0x1b0
[   88.370160][    T0]  secondary_startup_64+0xa4/0xb0
[   88.376601][    T0] Kernel Offset: disabled
[   88.380920][    T0] Rebooting in 86400 seconds..