[info] Using makefile-style concurrent boot in runlevel 2. [ 44.517864][ T26] audit: type=1800 audit(1576012349.386:21): pid=7378 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 44.548432][ T26] audit: type=1800 audit(1576012349.386:22): pid=7378 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 '10.128.0.162' (ECDSA) to the list of known hosts. 2019/12/10 21:12:38 fuzzer started 2019/12/10 21:12:39 dialing manager at 10.128.0.105:37821 2019/12/10 21:12:40 syscalls: 2689 2019/12/10 21:12:40 code coverage: enabled 2019/12/10 21:12:40 comparison tracing: enabled 2019/12/10 21:12:40 extra coverage: extra coverage is not supported by the kernel 2019/12/10 21:12:40 setuid sandbox: enabled 2019/12/10 21:12:40 namespace sandbox: enabled 2019/12/10 21:12:40 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/10 21:12:40 fault injection: enabled 2019/12/10 21:12:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/10 21:12:40 net packet injection: enabled 2019/12/10 21:12:40 net device setup: enabled 2019/12/10 21:12:40 concurrency sanitizer: enabled 2019/12/10 21:12:40 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 56.080133][ T7547] KCSAN: could not find function: 'poll_schedule_timeout' 2019/12/10 21:12:42 adding functions to KCSAN blacklist: 'pipe_poll' 'rcu_gp_fqs_check_wake' 'poll_schedule_timeout' 'find_get_pages_range_tag' '__hrtimer_run_queues' 'taskstats_exit' 'ext4_free_inode' 'tcp_add_backlog' 'pcpu_alloc' 'do_syslog' 'run_timer_softirq' 'ktime_get_real_seconds' 'xas_clear_mark' 'tomoyo_supervisor' 'find_next_bit' 'ep_poll' 'lruvec_lru_size' 'mm_update_next_owner' [ 66.682647][ T0] ================================================================== [ 66.690772][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer [ 66.699242][ T0] [ 66.701560][ T0] write to 0xffffffff85cb3ad0 of 4 bytes by interrupt on cpu 1: [ 66.709165][ T0] tick_sched_do_timer+0xc0/0xe0 [ 66.714080][ T0] tick_sched_timer+0x43/0xe0 [ 66.718733][ T0] __hrtimer_run_queues+0x274/0x5f0 [ 66.723906][ T0] hrtimer_interrupt+0x22a/0x480 [ 66.728821][ T0] smp_apic_timer_interrupt+0xdc/0x280 [ 66.734336][ T0] apic_timer_interrupt+0xf/0x20 [ 66.739244][ T0] [ 66.741551][ T0] read to 0xffffffff85cb3ad0 of 4 bytes by task 0 on cpu 0: [ 66.748816][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 66.754336][ T0] do_idle+0x1a5/0x280 [ 66.758379][ T0] cpu_startup_entry+0x1b/0x20 [ 66.763138][ T0] rest_init+0xec/0xf6 [ 66.767185][ T0] arch_call_rest_init+0x17/0x37 [ 66.772100][ T0] start_kernel+0x838/0x85e [ 66.776581][ T0] x86_64_start_reservations+0x29/0x2b [ 66.782017][ T0] x86_64_start_kernel+0x72/0x76 [ 66.786930][ T0] secondary_startup_64+0xa4/0xb0 [ 66.791922][ T0] [ 66.794223][ T0] Reported by Kernel Concurrency Sanitizer on: [ 66.800358][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0 [ 66.807881][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.817916][ T0] ================================================================== [ 66.825957][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 66.832539][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0 [ 66.840050][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.850080][ T0] Call Trace: [ 66.853350][ T0] dump_stack+0x11d/0x181 [ 66.857658][ T0] panic+0x210/0x640 [ 66.861542][ T0] ? vprintk_func+0x8d/0x140 [ 66.866113][ T0] kcsan_report.cold+0xc/0xd [ 66.870686][ T0] kcsan_setup_watchpoint+0x3fe/0x460 [ 66.876035][ T0] __tsan_read4+0xc6/0x100 [ 66.880438][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 66.885962][ T0] ? debug_smp_processor_id+0x4c/0x172 [ 66.891408][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.897635][ T0] do_idle+0x1a5/0x280 [ 66.901685][ T0] cpu_startup_entry+0x1b/0x20 [ 66.906435][ T0] rest_init+0xec/0xf6 [ 66.910492][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 66.917662][ T0] arch_call_rest_init+0x17/0x37 [ 66.922578][ T0] start_kernel+0x838/0x85e [ 66.927071][ T0] x86_64_start_reservations+0x29/0x2b [ 66.932509][ T0] x86_64_start_kernel+0x72/0x76 [ 66.937423][ T0] secondary_startup_64+0xa4/0xb0 [ 66.943645][ T0] Kernel Offset: disabled [ 66.947978][ T0] Rebooting in 86400 seconds..