[ 51.830350][ T25] audit: type=1800 audit(1572915897.700:27): pid=7842 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 51.868699][ T25] audit: type=1800 audit(1572915897.700:28): pid=7842 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.464409][ T25] audit: type=1800 audit(1572915898.400:29): pid=7842 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 52.487828][ T25] audit: type=1800 audit(1572915898.400:30): pid=7842 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. 2019/11/05 01:05:06 fuzzer started 2019/11/05 01:05:08 dialing manager at 10.128.0.105:37793 2019/11/05 01:05:11 syscalls: 2553 2019/11/05 01:05:11 code coverage: enabled 2019/11/05 01:05:11 comparison tracing: enabled 2019/11/05 01:05:11 extra coverage: extra coverage is not supported by the kernel 2019/11/05 01:05:11 setuid sandbox: enabled 2019/11/05 01:05:11 namespace sandbox: enabled 2019/11/05 01:05:11 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/05 01:05:11 fault injection: enabled 2019/11/05 01:05:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/05 01:05:11 net packet injection: enabled 2019/11/05 01:05:11 net device setup: enabled 2019/11/05 01:05:11 concurrency sanitizer: enabled 2019/11/05 01:05:11 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 69.339012][ T8007] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/05 01:05:19 adding functions to KCSAN blacklist: '__hrtimer_run_queues' 'blk_mq_sched_dispatch_requests' 'ext4_nonda_switch' 'fanotify_handle_event' '__alloc_file' 'pid_update_inode' 'do_nanosleep' 'vm_area_dup' 'rcu_gp_fqs_check_wake' 'find_get_pages_range_tag' 'lruvec_lru_size' 'xas_find_marked' '__skb_try_recv_from_queue' 'yama_ptracer_del' 'tcp_add_backlog' 'ext4_free_inodes_count' 'do_exit' 'copy_process' 'tick_sched_do_timer' 'poll_schedule_timeout' 'mod_timer' '__splice_from_pipe' 'do_syslog' 'ktime_get_real_seconds' 'taskstats_exit' 'pcpu_alloc' 'tomoyo_supervisor' 'ep_poll' 'ktime_get_seconds' 'process_srcu' 'atime_needs_update' 'dd_has_work' 'xas_clear_mark' 'ext4_has_free_clusters' 'task_dump_owner' 'generic_write_end' 'pipe_poll' 'echo_char' 'futex_wait_queue_me' 'kvm_arch_vcpu_load' 'wbt_done' 'blk_mq_get_request' 'run_timer_softirq' 'generic_permission' '__ext4_new_inode' 'add_timer' 'list_lru_count_one' 'find_next_bit' 'ext4_free_inode' 'generic_fillattr' 'ext4_mark_iloc_dirty' 'kauditd_thread' 'tick_do_update_jiffies64' 'blk_mq_dispatch_rq_list' 'timer_clear_idle' [ 114.742606][ T0] ================================================================== [ 114.750745][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick [ 114.759650][ T0] [ 114.761961][ T0] write to 0xffffffff85cb26d0 of 4 bytes by task 0 on cpu 0: [ 114.769315][ T0] tick_nohz_idle_stop_tick+0x525/0x670 [ 114.774840][ T0] do_idle+0x1a5/0x280 [ 114.778889][ T0] cpu_startup_entry+0x1b/0x20 [ 114.783636][ T0] rest_init+0xec/0xf6 [ 114.787689][ T0] arch_call_rest_init+0x17/0x37 [ 114.792622][ T0] start_kernel+0x838/0x85e [ 114.797107][ T0] x86_64_start_reservations+0x29/0x2b [ 114.802547][ T0] x86_64_start_kernel+0x72/0x76 [ 114.807467][ T0] secondary_startup_64+0xa4/0xb0 [ 114.812466][ T0] [ 114.814778][ T0] read to 0xffffffff85cb26d0 of 4 bytes by task 0 on cpu 1: [ 114.822052][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 114.827588][ T0] do_idle+0x1a5/0x280 [ 114.831637][ T0] cpu_startup_entry+0x1b/0x20 [ 114.836380][ T0] start_secondary+0x208/0x260 [ 114.841136][ T0] secondary_startup_64+0xa4/0xb0 [ 114.846131][ T0] [ 114.848447][ T0] Reported by Kernel Concurrency Sanitizer on: [ 114.854615][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc6+ #0 [ 114.861709][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.871757][ T0] ================================================================== [ 114.879797][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 114.886368][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc6+ #0 [ 114.893447][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.903481][ T0] Call Trace: [ 114.906790][ T0] dump_stack+0xf5/0x159 [ 114.911014][ T0] panic+0x210/0x640 [ 114.914907][ T0] ? vprintk_func+0x8d/0x140 [ 114.919484][ T0] kcsan_report.cold+0xc/0xe [ 114.924081][ T0] kcsan_setup_watchpoint+0x3fe/0x410 [ 114.929446][ T0] __tsan_read4+0x145/0x1f0 [ 114.933937][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 114.939463][ T0] ? debug_smp_processor_id+0x4c/0x172 [ 114.944908][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 114.951131][ T0] do_idle+0x1a5/0x280 [ 114.955193][ T0] ? complete+0x44/0x50 [ 114.959333][ T0] cpu_startup_entry+0x1b/0x20 [ 114.964096][ T0] start_secondary+0x208/0x260 [ 114.968844][ T0] secondary_startup_64+0xa4/0xb0 [ 114.975401][ T0] Kernel Offset: disabled [ 114.979731][ T0] Rebooting in 86400 seconds..