[info] Using makefile-style concurrent boot in runlevel 2.
[   42.325935][   T26] audit: type=1800 audit(1573883137.000:21): pid=7413 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[   42.379311][   T26] audit: type=1800 audit(1573883137.010:22): pid=7413 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 '10.128.1.29' (ECDSA) to the list of known hosts.
2019/11/16 05:45:47 fuzzer started
2019/11/16 05:45:48 dialing manager at 10.128.0.105:34521
2019/11/16 05:45:48 syscalls: 2566
2019/11/16 05:45:48 code coverage: enabled
2019/11/16 05:45:48 comparison tracing: enabled
2019/11/16 05:45:48 extra coverage: extra coverage is not supported by the kernel
2019/11/16 05:45:48 setuid sandbox: enabled
2019/11/16 05:45:48 namespace sandbox: enabled
2019/11/16 05:45:48 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/16 05:45:48 fault injection: enabled
2019/11/16 05:45:48 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/16 05:45:48 net packet injection: enabled
2019/11/16 05:45:48 net device setup: enabled
2019/11/16 05:45:48 concurrency sanitizer: enabled
2019/11/16 05:45:48 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   56.956769][ T7582] KCSAN: could not find function: 'poll_schedule_timeout'
2019/11/16 05:45:53 adding functions to KCSAN blacklist: 'tcp_add_backlog' 'run_timer_softirq' 'tomoyo_supervisor' 'common_perm_cond' 'tick_sched_do_timer' 'blk_mq_dispatch_rq_list' 'copy_process' 'ext4_has_free_clusters' '__hrtimer_run_queues' 'dd_has_work' 'echo_char' 'do_nanosleep' 'mod_timer' 'poll_schedule_timeout' 'pipe_poll' 'pipe_wait' 'ep_poll' 'tick_nohz_next_event' 'pid_update_inode' 'generic_write_end' 'blk_mq_get_request' 'find_next_bit' 'xas_clear_mark' 'rcu_gp_fqs_check_wake' 'kcm_ioctl' 
[   73.758656][    T0] ==================================================================
[   73.767296][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   73.776301][    T0] 
[   73.778730][    T0] write to 0xffffffff85cb3ad0 of 4 bytes by task 0 on cpu 0:
[   73.786121][    T0]  tick_nohz_idle_stop_tick+0x525/0x670
[   73.791682][    T0]  do_idle+0x1a5/0x280
[   73.795740][    T0]  cpu_startup_entry+0x1b/0x20
[   73.800502][    T0]  rest_init+0xec/0xf6
[   73.804565][    T0]  arch_call_rest_init+0x17/0x37
[   73.809486][    T0]  start_kernel+0x838/0x85e
[   73.813972][    T0]  x86_64_start_reservations+0x29/0x2b
[   73.819413][    T0]  x86_64_start_kernel+0x72/0x76
[   73.824352][    T0]  secondary_startup_64+0xa4/0xb0
[   73.829365][    T0] 
[   73.832434][    T0] read to 0xffffffff85cb3ad0 of 4 bytes by task 0 on cpu 1:
[   73.839830][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   73.845460][    T0]  do_idle+0x1a5/0x280
[   73.849549][    T0]  cpu_startup_entry+0x1b/0x20
[   73.854302][    T0]  start_secondary+0x168/0x1b0
[   73.859047][    T0]  secondary_startup_64+0xa4/0xb0
[   73.864044][    T0] 
[   73.866351][    T0] Reported by Kernel Concurrency Sanitizer on:
[   73.872488][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[   73.879584][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.889626][    T0] ==================================================================
[   73.897792][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   73.904518][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc7+ #0
[   73.911615][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.922466][    T0] Call Trace:
[   73.925768][    T0]  dump_stack+0x11d/0x181
[   73.930084][    T0]  panic+0x210/0x640
[   73.933975][    T0]  ? vprintk_func+0x8d/0x140
[   73.938575][    T0]  kcsan_report.cold+0xc/0xd
[   73.943165][    T0]  kcsan_setup_watchpoint+0x3fe/0x460
[   73.949477][    T0]  __tsan_read4+0xc6/0x100
[   73.953877][    T0]  tick_nohz_idle_stop_tick+0x193/0x670
[   73.959422][    T0]  ? debug_smp_processor_id+0x4c/0x172
[   73.964977][    T0]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   73.971241][    T0]  do_idle+0x1a5/0x280
[   73.975337][    T0]  ? debug_smp_processor_id+0x47/0x172
[   73.980889][    T0]  cpu_startup_entry+0x1b/0x20
[   73.985657][    T0]  start_secondary+0x168/0x1b0
[   73.990420][    T0]  secondary_startup_64+0xa4/0xb0
[   73.996972][    T0] Kernel Offset: disabled
[   74.001301][    T0] Rebooting in 86400 seconds..