[info] Using makefile-style concurrent boot in runlevel 2.
[   44.096638][   T26] audit: type=1800 audit(1584573982.468:21): pid=7645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   44.155430][   T26] audit: type=1800 audit(1584573982.468:22): pid=7645 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 '10.128.0.6' (ECDSA) to the list of known hosts.
2020/03/18 23:26:32 fuzzer started
2020/03/18 23:26:34 dialing manager at 10.128.0.105:33685
2020/03/18 23:26:34 syscalls: 2955
2020/03/18 23:26:34 code coverage: enabled
2020/03/18 23:26:34 comparison tracing: enabled
2020/03/18 23:26:34 extra coverage: enabled
2020/03/18 23:26:34 setuid sandbox: enabled
2020/03/18 23:26:34 namespace sandbox: enabled
2020/03/18 23:26:34 Android sandbox: /sys/fs/selinux/policy does not exist
2020/03/18 23:26:34 fault injection: enabled
2020/03/18 23:26:34 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/03/18 23:26:34 net packet injection: enabled
2020/03/18 23:26:34 net device setup: enabled
2020/03/18 23:26:34 concurrency sanitizer: enabled
2020/03/18 23:26:34 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   56.609471][ T7812] KCSAN: could not find function: '_find_next_bit'
[   57.184353][ T7812] KCSAN: could not find function: 'poll_schedule_timeout'
2020/03/18 23:26:36 adding functions to KCSAN blacklist: '__filemap_fdatawrite_range' 'ext4_nonda_switch' '__ext4_new_inode' '_find_next_bit' 'generic_write_end' 'mod_timer' 'poll_schedule_timeout' 'ep_poll' 'blk_mq_get_request' 'kauditd_thread' 'xas_clear_mark' 
[   67.942162][    T0] ==================================================================
[   67.950335][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   67.958891][    T0] 
[   67.961202][    T0] write to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 1:
[   67.968574][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   67.974108][    T0]  do_idle+0x1ad/0x290
[   67.978156][    T0]  cpu_startup_entry+0x14/0x20
[   67.982901][    T0]  start_secondary+0x164/0x1b0
[   67.987674][    T0]  secondary_startup_64+0xa4/0xb0
[   67.993536][    T0] 
[   67.995864][    T0] read to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 0:
[   68.003124][    T0]  tick_nohz_next_event+0x192/0x350
[   68.008305][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   68.013844][    T0]  do_idle+0x1ad/0x290
[   68.017893][    T0]  cpu_startup_entry+0x14/0x20
[   68.022635][    T0]  rest_init+0xe4/0xeb
[   68.026684][    T0]  arch_call_rest_init+0x13/0x2b
[   68.031599][    T0]  start_kernel+0xcc2/0xceb
[   68.036094][    T0]  secondary_startup_64+0xa4/0xb0
[   68.041088][    T0] 
[   68.043391][    T0] Reported by Kernel Concurrency Sanitizer on:
[   68.049523][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   68.057474][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.067533][    T0] ==================================================================
[   68.075585][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   68.082169][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc1-syzkaller #0
[   68.090076][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.100480][    T0] Call Trace:
[   68.103784][    T0]  dump_stack+0x11d/0x187
[   68.108098][    T0]  panic+0x210/0x640
[   68.111983][    T0]  ? vprintk_func+0x89/0x13a
[   68.116559][    T0]  kcsan_report.cold+0xc/0xf
[   68.121137][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   68.126494][    T0]  tick_nohz_next_event+0x192/0x350
[   68.131676][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   68.137202][    T0]  ? ktime_get+0x1c9/0x210
[   68.141601][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   68.147061][    T0]  do_idle+0x1ad/0x290
[   68.151111][    T0]  ? do_idle+0xe0/0x290
[   68.155250][    T0]  cpu_startup_entry+0x14/0x20
[   68.160013][    T0]  rest_init+0xe4/0xeb
[   68.164121][    T0]  arch_call_rest_init+0x13/0x2b
[   68.169050][    T0]  start_kernel+0xcc2/0xceb
[   68.173589][    T0]  secondary_startup_64+0xa4/0xb0
[   68.179956][    T0] Kernel Offset: disabled
[   68.184557][    T0] Rebooting in 86400 seconds..