[info] Using makefile-style concurrent boot in runlevel 2.
[   44.257872][   T27] audit: type=1800 audit(1584527898.901:21): pid=7689 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   44.302042][   T27] audit: type=1800 audit(1584527898.901:22): pid=7689 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 '10.128.0.69' (ECDSA) to the list of known hosts.
2020/03/18 10:38:30 fuzzer started
2020/03/18 10:38:32 dialing manager at 10.128.0.105:41097
2020/03/18 10:38:36 syscalls: 2955
2020/03/18 10:38:36 code coverage: enabled
2020/03/18 10:38:36 comparison tracing: enabled
2020/03/18 10:38:36 extra coverage: enabled
2020/03/18 10:38:36 setuid sandbox: enabled
2020/03/18 10:38:36 namespace sandbox: enabled
2020/03/18 10:38:36 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/18 10:38:36 fault injection: enabled
2020/03/18 10:38:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/18 10:38:36 net packet injection: enabled
2020/03/18 10:38:36 net device setup: enabled
2020/03/18 10:38:36 concurrency sanitizer: enabled
2020/03/18 10:38:36 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   63.362466][ T7853] KCSAN: could not find function: '_find_next_bit'
2020/03/18 10:38:39 adding functions to KCSAN blacklist: 'generic_write_end' 'ep_poll' 'kauditd_thread' 'audit_log_start' 'do_exit' 'tick_sched_do_timer' '__ext4_new_inode' '__mark_inode_dirty' 'ext4_nonda_switch' 'do_nanosleep' '_find_next_bit' 'page_counter_try_charge' 'ext4_has_free_clusters' 'list_lru_count_one' 'add_timer' 'do_signal_stop' 'lruvec_lru_size' 'xas_clear_mark' 'ext4_free_inodes_count' 'ep_insert' 'find_get_pages_range_tag' 'run_timer_softirq' 'do_syslog' 'mod_timer' 'blk_mq_dispatch_rq_list' 'blk_mq_get_request' 'wbt_issue' 'poll_schedule_timeout' 
[   65.263109][ T7853] KCSAN: could not find function: 'poll_schedule_timeout'
[  113.937833][    T0] ==================================================================
[  113.946113][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  113.954685][    T0] 
[  113.957014][    T0] write to 0xffffffff85d05610 of 4 bytes by task 0 on cpu 1:
[  113.964438][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  113.969985][    T0]  do_idle+0x1ad/0x290
[  113.974116][    T0]  cpu_startup_entry+0x14/0x20
[  113.978871][    T0]  start_secondary+0x164/0x1b0
[  113.983729][    T0]  secondary_startup_64+0xa4/0xb0
[  113.988841][    T0] 
[  113.991234][    T0] read to 0xffffffff85d05610 of 4 bytes by task 0 on cpu 0:
[  113.998524][    T0]  tick_nohz_next_event+0x192/0x350
[  114.003730][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  114.009270][    T0]  do_idle+0x1ad/0x290
[  114.013340][    T0]  cpu_startup_entry+0x14/0x20
[  114.018097][    T0]  rest_init+0xe4/0xeb
[  114.022210][    T0]  arch_call_rest_init+0x13/0x2b
[  114.027250][    T0]  start_kernel+0xcc2/0xceb
[  114.031791][    T0]  secondary_startup_64+0xa4/0xb0
[  114.036894][    T0] 
[  114.039234][    T0] Reported by Kernel Concurrency Sanitizer on:
[  114.045410][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[  114.053401][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  114.063554][    T0] ==================================================================
[  114.071619][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  114.078214][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[  114.086128][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  114.096311][    T0] Call Trace:
[  114.099684][    T0]  dump_stack+0x11d/0x187
[  114.104064][    T0]  panic+0x210/0x640
[  114.107966][    T0]  ? vprintk_func+0x89/0x13a
[  114.112552][    T0]  kcsan_report.cold+0xc/0x14
[  114.117222][    T0]  kcsan_setup_watchpoint+0x3e3/0x420
[  114.122596][    T0]  tick_nohz_next_event+0x192/0x350
[  114.127909][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  114.133505][    T0]  ? ktime_get+0x1c9/0x210
[  114.137923][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  114.143391][    T0]  do_idle+0x1ad/0x290
[  114.147907][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  114.153365][    T0]  cpu_startup_entry+0x14/0x20
[  114.158113][    T0]  rest_init+0xe4/0xeb
[  114.162213][    T0]  arch_call_rest_init+0x13/0x2b
[  114.167169][    T0]  start_kernel+0xcc2/0xceb
[  114.171674][    T0]  secondary_startup_64+0xa4/0xb0
[  114.178324][    T0] Kernel Offset: disabled
[  114.182643][    T0] Rebooting in 86400 seconds..