[info] Using makefile-style concurrent boot in runlevel 2.
[   44.968951][   T27] audit: type=1800 audit(1585299089.647:21): pid=7522 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   45.011294][   T27] audit: type=1800 audit(1585299089.647:22): pid=7522 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 '10.128.1.58' (ECDSA) to the list of known hosts.
2020/03/27 08:51:39 fuzzer started
2020/03/27 08:51:40 dialing manager at 10.128.0.105:39433
2020/03/27 08:51:41 syscalls: 2955
2020/03/27 08:51:41 code coverage: enabled
2020/03/27 08:51:41 comparison tracing: enabled
2020/03/27 08:51:41 extra coverage: enabled
2020/03/27 08:51:41 setuid sandbox: enabled
2020/03/27 08:51:41 namespace sandbox: enabled
2020/03/27 08:51:41 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/27 08:51:41 fault injection: enabled
2020/03/27 08:51:41 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/27 08:51:41 net packet injection: enabled
2020/03/27 08:51:41 net device setup: enabled
2020/03/27 08:51:41 concurrency sanitizer: enabled
2020/03/27 08:51:41 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/03/27 08:51:42 adding functions to KCSAN blacklist: 'generic_fillattr' 'ep_poll' 'xas_clear_mark' 'ext4_free_inodes_count' 'do_signal_stop' 'alloc_pid' 'blk_mq_get_request' 
syzkaller login: [   67.315150][    T0] ==================================================================
[   67.323410][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   67.332315][    T0] 
[   67.334663][    T0] write to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 1:
[   67.342028][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   67.347555][    T0]  do_idle+0x1ad/0x290
[   67.351643][    T0]  cpu_startup_entry+0x14/0x20
[   67.356390][    T0]  start_secondary+0x164/0x1b0
[   67.361140][    T0]  secondary_startup_64+0xa4/0xb0
[   67.366134][    T0] 
[   67.368444][    T0] read to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 0:
[   67.375707][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   67.381264][    T0]  do_idle+0x1ad/0x290
[   67.385311][    T0]  cpu_startup_entry+0x14/0x20
[   67.390067][    T0]  rest_init+0xe4/0xeb
[   67.394127][    T0]  arch_call_rest_init+0x13/0x2b
[   67.399045][    T0]  start_kernel+0xcc2/0xceb
[   67.403524][    T0]  secondary_startup_64+0xa4/0xb0
[   67.408519][    T0] 
[   67.410823][    T0] Reported by Kernel Concurrency Sanitizer on:
[   67.416955][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   67.424823][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.434858][    T0] ==================================================================
[   67.442896][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   67.449469][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   67.457369][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.467409][    T0] Call Trace:
[   67.470696][    T0]  dump_stack+0x11d/0x187
[   67.475021][    T0]  panic+0x210/0x640
[   67.478910][    T0]  ? vprintk_func+0x89/0x13a
[   67.483878][    T0]  kcsan_report.cold+0xc/0xf
[   67.488465][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   67.493872][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   67.499480][    T0]  do_idle+0x1ad/0x290
[   67.503543][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   67.509087][    T0]  cpu_startup_entry+0x14/0x20
[   67.513840][    T0]  rest_init+0xe4/0xeb
[   67.517954][    T0]  arch_call_rest_init+0x13/0x2b
[   67.522884][    T0]  start_kernel+0xcc2/0xceb
[   67.527386][    T0]  secondary_startup_64+0xa4/0xb0
[   67.533737][    T0] Kernel Offset: disabled
[   67.538059][    T0] Rebooting in 86400 seconds..