[ 34.301823][ T25] audit: type=1800 audit(1570748744.722:25): pid=7051 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 34.329430][ T25] audit: type=1800 audit(1570748744.722:26): pid=7051 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 34.354285][ T25] audit: type=1800 audit(1570748744.722:27): pid=7051 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 34.736452][ T7115] sshd (7115) used greatest stack depth: 10032 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts.
2019/10/10 23:05:56 fuzzer started
2019/10/10 23:05:56 dialing manager at 10.128.0.105:37331
2019/10/10 23:05:56 syscalls: 2523
2019/10/10 23:05:56 code coverage: enabled
2019/10/10 23:05:56 comparison tracing: enabled
2019/10/10 23:05:56 extra coverage: extra coverage is not supported by the kernel
2019/10/10 23:05:56 setuid sandbox: enabled
2019/10/10 23:05:56 namespace sandbox: enabled
2019/10/10 23:05:56 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/10 23:05:56 fault injection: enabled
2019/10/10 23:05:56 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/10 23:05:56 net packet injection: enabled
2019/10/10 23:05:56 net device setup: enabled
2019/10/10 23:05:56 concurrency sanitizer: enabled
syzkaller login: [ 46.457553][ C1] ==================================================================
[ 46.465938][ C1] BUG: KCSAN: data-race in timer_clear_idle / trigger_dyntick_cpu.isra.0
[ 46.474637][ C1]
[ 46.476956][ C1] write to 0xffff88812be1b6e4 of 1 bytes by task 0 on cpu 0:
[ 46.484491][ C1] timer_clear_idle+0x42/0x50
[ 46.489260][ C1] tick_nohz_next_event+0x164/0x380
[ 46.494461][ C1] tick_nohz_idle_stop_tick+0x3c2/0x670
[ 46.500381][ C1] do_idle+0x1e0/0x2c0
[ 46.504437][ C1] cpu_startup_entry+0x1b/0x20
[ 46.509442][ C1] rest_init+0xec/0xf6
[ 46.513582][ C1] arch_call_rest_init+0x17/0x37
[ 46.519593][ C1] start_kernel+0x83e/0x864
[ 46.524685][ C1] x86_64_start_reservations+0x29/0x2b
[ 46.531272][ C1] x86_64_start_kernel+0x72/0x76
[ 46.536292][ C1] secondary_startup_64+0xa4/0xb0
[ 46.541552][ C1]
[ 46.543875][ C1] read to 0xffff88812be1b6e4 of 1 bytes by interrupt on cpu 1:
[ 46.551413][ C1] trigger_dyntick_cpu.isra.0+0x75/0x100
[ 46.557030][ C1] add_timer_on+0x186/0x2d0
[ 46.561522][ C1] clocksource_watchdog+0x63f/0x760
[ 46.567153][ C1] call_timer_fn+0x5f/0x2f0
[ 46.571642][ C1] run_timer_softirq+0xcd9/0xd20
[ 46.576593][ C1] __do_softirq+0x115/0x33f
[ 46.581434][ C1] irq_exit+0xbb/0xe0
[ 46.585399][ C1] smp_apic_timer_interrupt+0xe6/0x280
[ 46.590909][ C1] apic_timer_interrupt+0xf/0x20
[ 46.595844][ C1] native_safe_halt+0xe/0x10
[ 46.600615][ C1] arch_cpu_idle+0x1f/0x30
[ 46.605013][ C1] default_idle_call+0x1e/0x40
[ 46.609846][ C1] do_idle+0x1ea/0x2c0
[ 46.613991][ C1]
[ 46.616647][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 46.622877][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 46.630062][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 46.640216][ C1] ==================================================================
[ 46.648850][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 46.656493][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 46.664809][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 46.678389][ C1] Call Trace:
[ 46.682995][ C1]
[ 46.686026][ C1] dump_stack+0xf5/0x159
[ 46.690873][ C1] panic+0x209/0x639
[ 46.696435][ C1] ? apic_timer_interrupt+0xf/0x20
[ 46.702273][ C1] ? vprintk_func+0x8d/0x140
[ 46.707737][ C1] kcsan_report.cold+0xc/0x1b
[ 46.713924][ C1] __kcsan_setup_watchpoint+0x3ee/0x510
[ 46.720814][ C1] __tsan_read1+0x2c/0x30
[ 46.725758][ C1] trigger_dyntick_cpu.isra.0+0x75/0x100
[ 46.733341][ C1] add_timer_on+0x186/0x2d0
[ 46.739043][ C1] clocksource_watchdog+0x63f/0x760
[ 46.745562][ C1] ? clocksource_select_watchdog+0x400/0x400
[ 46.753872][ C1] call_timer_fn+0x5f/0x2f0
[ 46.759427][ C1] ? clocksource_select_watchdog+0x400/0x400
[ 46.766657][ C1] ? clocksource_select_watchdog+0x400/0x400
[ 46.774671][ C1] run_timer_softirq+0xcd9/0xd20
[ 46.780214][ C1] ? sched_clock+0x34/0x40
[ 46.784905][ C1] ? sched_clock_cpu+0x15/0xe0
[ 46.789744][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 46.796343][ C1] __do_softirq+0x115/0x33f
[ 46.801642][ C1] irq_exit+0xbb/0xe0
[ 46.805886][ C1] smp_apic_timer_interrupt+0xe6/0x280
[ 46.811430][ C1] apic_timer_interrupt+0xf/0x20
[ 46.817045][ C1]
[ 46.820420][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 46.826331][ C1] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 8c d2 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 7c d2 4e 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 82 78 a7 fc e8 5d 52 b9 fd 0f
[ 46.852176][ C1] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 46.864729][ C1] RAX: cac083126e978eb6 RBX: 0000000000000001 RCX: 0000000000000634
[ 46.875074][ C1] RDX: 00000000000130b0 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 46.884799][ C1] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 46.893277][ C1] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffff88812b38f0c0
[ 46.903930][ C1] R13: ffff88812b38f0c0 R14: 0000000000000000 R15: 0000000000000000
[ 46.913480][ C1] ? default_idle+0x50/0x230
[ 46.919400][ C1] arch_cpu_idle+0x1f/0x30
[ 46.924800][ C1] default_idle_call+0x1e/0x40
[ 46.932748][ C1] do_idle+0x1ea/0x2c0
[ 46.937807][ C1] ? complete+0x44/0x50
[ 46.942419][ C1] cpu_startup_entry+0x1b/0x20
[ 46.947284][ C1] start_secondary+0x207/0x260
[ 46.954602][ C1] secondary_startup_64+0xa4/0xb0
[ 48.099801][ C1] Shutting down cpus with NMI
[ 48.105737][ C1] Kernel Offset: disabled
[ 48.110070][ C1] Rebooting in 86400 seconds..