[ 57.714277][ T26] audit: type=1800 audit(1573138696.090:27): pid=7773 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 57.736467][ T26] audit: type=1800 audit(1573138696.090:28): pid=7773 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. [ 58.660310][ T26] audit: type=1800 audit(1573138697.110:29): pid=7773 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 [ 58.680556][ T26] audit: type=1800 audit(1573138697.110:30): pid=7773 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 '10.128.1.23' (ECDSA) to the list of known hosts. 2019/11/07 14:58:26 fuzzer started 2019/11/07 14:58:28 dialing manager at 10.128.0.105:36923 2019/11/07 14:58:28 syscalls: 2553 2019/11/07 14:58:28 code coverage: enabled 2019/11/07 14:58:28 comparison tracing: enabled 2019/11/07 14:58:28 extra coverage: extra coverage is not supported by the kernel 2019/11/07 14:58:28 setuid sandbox: enabled 2019/11/07 14:58:28 namespace sandbox: enabled 2019/11/07 14:58:28 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/07 14:58:28 fault injection: enabled 2019/11/07 14:58:28 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/07 14:58:28 net packet injection: enabled 2019/11/07 14:58:28 net device setup: enabled 2019/11/07 14:58:28 concurrency sanitizer: enabled 2019/11/07 14:58:28 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/07 14:58:29 adding functions to KCSAN blacklist: '__hrtimer_run_queues' 'generic_permission' '__splice_from_pipe' 'tcp_add_backlog' 'find_get_pages_range_tag' 'run_timer_softirq' 'tomoyo_supervisor' 'find_next_bit' 'ktime_get_real_seconds' 'task_dump_owner' syzkaller login: [ 73.717058][ T0] ================================================================== [ 73.725239][ T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer [ 73.733392][ T0] [ 73.735940][ T0] write to 0xffffffff85cb26d0 of 4 bytes by interrupt on cpu 1: [ 73.743653][ T0] tick_sched_do_timer+0xc0/0xe0 [ 73.748604][ T0] tick_sched_timer+0x43/0xe0 [ 73.753300][ T0] __hrtimer_run_queues+0x274/0x5f0 [ 73.758519][ T0] hrtimer_interrupt+0x22a/0x480 [ 73.763487][ T0] smp_apic_timer_interrupt+0xdc/0x280 [ 73.768958][ T0] apic_timer_interrupt+0xf/0x20 [ 73.773975][ T0] native_safe_halt+0xe/0x10 [ 73.778580][ T0] arch_cpu_idle+0x1f/0x30 [ 73.783036][ T0] default_idle_call+0x1e/0x40 [ 73.787810][ T0] do_idle+0x1af/0x280 [ 73.791887][ T0] cpu_startup_entry+0x1b/0x20 [ 73.796661][ T0] start_secondary+0x208/0x260 [ 73.801431][ T0] secondary_startup_64+0xa4/0xb0 [ 73.806439][ T0] [ 73.808789][ T0] read to 0xffffffff85cb26d0 of 4 bytes by task 0 on cpu 0: [ 73.816102][ T0] tick_nohz_next_event+0x19d/0x370 [ 73.821317][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 73.826877][ T0] do_idle+0x1a5/0x280 [ 73.830957][ T0] cpu_startup_entry+0x1b/0x20 [ 73.835731][ T0] rest_init+0xec/0xf6 [ 73.839810][ T0] arch_call_rest_init+0x17/0x37 [ 73.844756][ T0] start_kernel+0x838/0x85e [ 73.849279][ T0] x86_64_start_reservations+0x29/0x2b [ 73.854791][ T0] x86_64_start_kernel+0x72/0x76 [ 73.859849][ T0] secondary_startup_64+0xa4/0xb0 [ 73.864858][ T0] [ 73.867190][ T0] Reported by Kernel Concurrency Sanitizer on: [ 73.873343][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0 [ 73.880445][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.890498][ T0] ================================================================== [ 73.898572][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 73.905176][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc6+ #0 [ 73.912290][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.922358][ T0] Call Trace: [ 73.925769][ T0] dump_stack+0xf5/0x159 [ 73.930010][ T0] panic+0x210/0x640 [ 73.934032][ T0] ? vprintk_func+0x8d/0x140 [ 73.938652][ T0] kcsan_report.cold+0xc/0xe [ 73.943271][ T0] kcsan_setup_watchpoint+0x3fe/0x410 [ 73.948655][ T0] __tsan_read4+0x145/0x1f0 [ 73.953178][ T0] tick_nohz_next_event+0x19d/0x370 [ 73.958408][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 73.963983][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.970247][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.976513][ T0] ? debug_smp_processor_id+0x4c/0x172 [ 73.983328][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.989577][ T0] do_idle+0x1a5/0x280 [ 73.993671][ T0] cpu_startup_entry+0x1b/0x20 [ 73.998446][ T0] rest_init+0xec/0xf6 [ 74.002580][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce [ 74.009803][ T0] arch_call_rest_init+0x17/0x37 [ 74.014769][ T0] start_kernel+0x838/0x85e [ 74.019308][ T0] x86_64_start_reservations+0x29/0x2b [ 74.024785][ T0] x86_64_start_kernel+0x72/0x76 [ 74.029746][ T0] secondary_startup_64+0xa4/0xb0 [ 74.036057][ T0] Kernel Offset: disabled [ 74.040394][ T0] Rebooting in 86400 seconds..