[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 34.733346][ T25] audit: type=1800 audit(1570730430.174:25): pid=7095 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 34.767002][ T25] audit: type=1800 audit(1570730430.174:26): pid=7095 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 34.789053][ T25] audit: type=1800 audit(1570730430.174:27): pid=7095 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.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.216' (ECDSA) to the list of known hosts.
2019/10/10 18:00:41 fuzzer started
2019/10/10 18:00:42 dialing manager at 10.128.0.105:34287
2019/10/10 18:00:42 syscalls: 2523
2019/10/10 18:00:42 code coverage: enabled
2019/10/10 18:00:42 comparison tracing: enabled
2019/10/10 18:00:42 extra coverage: extra coverage is not supported by the kernel
2019/10/10 18:00:42 setuid sandbox: enabled
2019/10/10 18:00:42 namespace sandbox: enabled
2019/10/10 18:00:42 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/10 18:00:42 fault injection: enabled
2019/10/10 18:00:42 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/10 18:00:42 net packet injection: enabled
2019/10/10 18:00:42 net device setup: enabled
2019/10/10 18:00:42 concurrency sanitizer: enabled
syzkaller login: [ 47.813003][ T0] ==================================================================
[ 47.821163][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 47.830088][ T0]
[ 47.833238][ T0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
[ 47.841094][ T0] tick_do_update_jiffies64+0x105/0x260
[ 47.846788][ T0] tick_sched_do_timer+0xd4/0xe0
[ 47.851820][ T0] tick_sched_timer+0x43/0xe0
[ 47.856508][ T0] __hrtimer_run_queues+0x288/0x600
[ 47.861703][ T0] hrtimer_interrupt+0x22a/0x480
[ 47.866640][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 47.872190][ T0] apic_timer_interrupt+0xf/0x20
[ 47.877113][ T0]
[ 47.879448][ T0] read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 1:
[ 47.886738][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.892380][ T0] tick_irq_enter+0x139/0x1c0
[ 47.897061][ T0] irq_enter+0x4f/0x60
[ 47.901214][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.906950][ T0] apic_timer_interrupt+0xf/0x20
[ 47.912151][ T0] native_safe_halt+0xe/0x10
[ 47.916766][ T0] arch_cpu_idle+0x1f/0x30
[ 47.921196][ T0] default_idle_call+0x1e/0x40
[ 47.925952][ T0] do_idle+0x1ea/0x2c0
[ 47.930014][ T0] cpu_startup_entry+0x1b/0x20
[ 47.934776][ T0] start_secondary+0x207/0x260
[ 47.939536][ T0] secondary_startup_64+0xa4/0xb0
[ 47.944554][ T0]
[ 47.946872][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 47.953029][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 47.959869][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.969925][ T0] ==================================================================
[ 47.977988][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 47.984577][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 47.991507][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 48.001559][ T0] Call Trace:
[ 48.004832][ T0]
[ 48.007690][ T0] dump_stack+0xf5/0x159
[ 48.011948][ T0] panic+0x209/0x639
[ 48.015851][ T0] ? do_idle+0x1ea/0x2c0
[ 48.020071][ T0] ? vprintk_func+0x8d/0x140
[ 48.024673][ T0] kcsan_report.cold+0xc/0x1b
[ 48.029342][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 48.034865][ T0] __tsan_read8+0x2c/0x30
[ 48.039359][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 48.044798][ T0] tick_irq_enter+0x139/0x1c0
[ 48.049894][ T0] irq_enter+0x4f/0x60
[ 48.053952][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 48.059397][ T0] ? smp_call_function_single_interrupt+0x80/0x1c0
[ 48.065985][ T0] apic_timer_interrupt+0xf/0x20
[ 48.070897][ T0]
[ 48.073820][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 48.079172][ T0] 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
[ 48.098950][ T0] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 48.107348][ T0] RAX: fbe76c8b4395b14b RBX: 0000000000000001 RCX: 00000000000007b9
[ 48.115711][ T0] RDX: 000000000029dec0 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 48.123674][ T0] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 48.131636][ T0] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffff88812b38f0c0
[ 48.139606][ T0] R13: ffff88812b38f0c0 R14: 0000000000000000 R15: 0000000000000000
[ 48.150873][ T0] ? default_idle+0x50/0x230
[ 48.155460][ T0] arch_cpu_idle+0x1f/0x30
[ 48.159856][ T0] default_idle_call+0x1e/0x40
[ 48.164611][ T0] do_idle+0x1ea/0x2c0
[ 48.168664][ T0] ? complete+0x44/0x50
[ 48.172797][ T0] cpu_startup_entry+0x1b/0x20
[ 48.177541][ T0] start_secondary+0x207/0x260
[ 48.182285][ T0] secondary_startup_64+0xa4/0xb0
[ 48.188507][ T0] Kernel Offset: disabled
[ 48.192894][ T0] Rebooting in 86400 seconds..