[info] Using makefile-style concurrent boot in runlevel 2.
[   45.209991][   T27] audit: type=1800 audit(1586282786.280:21): pid=7560 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   45.243432][   T27] audit: type=1800 audit(1586282786.280:22): pid=7560 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 '10.128.0.101' (ECDSA) to the list of known hosts.
2020/04/07 18:06:35 fuzzer started
2020/04/07 18:06:37 dialing manager at 10.128.0.105:38669
2020/04/07 18:06:44 syscalls: 2955
2020/04/07 18:06:44 code coverage: enabled
2020/04/07 18:06:44 comparison tracing: enabled
2020/04/07 18:06:44 extra coverage: enabled
2020/04/07 18:06:44 setuid sandbox: enabled
2020/04/07 18:06:44 namespace sandbox: enabled
2020/04/07 18:06:44 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/07 18:06:44 fault injection: enabled
2020/04/07 18:06:44 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/07 18:06:44 net packet injection: enabled
2020/04/07 18:06:44 net device setup: enabled
2020/04/07 18:06:44 concurrency sanitizer: enabled
2020/04/07 18:06:44 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/07 18:06:44 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   65.271393][ T7728] KCSAN: could not find function: '_find_next_bit'
2020/04/07 18:06:47 adding functions to KCSAN blacklist: 'add_timer' 'dd_has_work' 'lruvec_lru_size' 'copy_process' 'tick_sched_do_timer' '__ext4_new_inode' 'ext4_free_inodes_count' '__perf_event_overflow' 'ext4_nonda_switch' 'find_get_pages_range_tag' 'run_timer_softirq' 'generic_write_end' '__delete_from_page_cache' 'do_nanosleep' 'pcpu_alloc' 'ep_poll' '_find_next_bit' 'xas_clear_mark' 'kcm_rcv_strparser' 'audit_log_start' 'do_syslog' 'blk_mq_sched_dispatch_requests' 'mod_timer' 'blk_mq_dispatch_rq_list' 'kauditd_thread' 
[  143.914334][    T0] ==================================================================
[  143.922469][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  143.931128][    T0] 
[  143.933443][    T0] write to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 0:
[  143.940800][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  143.946325][    T0]  do_idle+0x1ad/0x290
[  143.950370][    T0]  cpu_startup_entry+0x14/0x20
[  143.955114][    T0]  rest_init+0xe4/0xeb
[  143.959357][    T0]  arch_call_rest_init+0x13/0x2b
[  143.964285][    T0]  start_kernel+0xcc2/0xceb
[  143.968767][    T0]  secondary_startup_64+0xa4/0xb0
[  143.973771][    T0] 
[  143.976092][    T0] read to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 1:
[  143.983405][    T0]  tick_nohz_next_event+0x192/0x350
[  143.988746][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  143.994274][    T0]  do_idle+0x1ad/0x290
[  143.998335][    T0]  cpu_startup_entry+0x14/0x20
[  144.003083][    T0]  start_secondary+0x164/0x1b0
[  144.007926][    T0]  secondary_startup_64+0xa4/0xb0
[  144.012925][    T0] 
[  144.015230][    T0] Reported by Kernel Concurrency Sanitizer on:
[  144.021363][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[  144.029225][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  144.039276][    T0] ==================================================================
[  144.047312][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  144.053876][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[  144.061743][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  144.071772][    T0] Call Trace:
[  144.075044][    T0]  dump_stack+0x11d/0x187
[  144.079355][    T0]  panic+0x210/0x640
[  144.083232][    T0]  ? vprintk_func+0x89/0x13a
[  144.087807][    T0]  kcsan_report.cold+0xc/0xf
[  144.092398][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  144.097816][    T0]  tick_nohz_next_event+0x192/0x350
[  144.103006][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  144.108530][    T0]  ? ktime_get+0x1c9/0x210
[  144.112931][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  144.118372][    T0]  do_idle+0x1ad/0x290
[  144.122432][    T0]  ? do_idle+0xe0/0x290
[  144.126602][    T0]  cpu_startup_entry+0x14/0x20
[  144.131347][    T0]  start_secondary+0x164/0x1b0
[  144.136091][    T0]  secondary_startup_64+0xa4/0xb0
[  144.142453][    T0] Kernel Offset: disabled
[  144.146782][    T0] Rebooting in 86400 seconds..