[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 40.539992][ T25] audit: type=1800 audit(1570941678.840:25): pid=6990 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 40.559980][ T25] audit: type=1800 audit(1570941678.840:26): pid=6990 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 40.590257][ T25] audit: type=1800 audit(1570941678.840:27): pid=6990 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 '10.128.0.64' (ECDSA) to the list of known hosts.
2019/10/13 04:41:29 fuzzer started
2019/10/13 04:41:31 dialing manager at 10.128.0.105:43913
2019/10/13 04:41:31 syscalls: 2523
2019/10/13 04:41:31 code coverage: enabled
2019/10/13 04:41:31 comparison tracing: enabled
2019/10/13 04:41:31 extra coverage: extra coverage is not supported by the kernel
2019/10/13 04:41:31 setuid sandbox: enabled
2019/10/13 04:41:31 namespace sandbox: enabled
2019/10/13 04:41:31 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/13 04:41:31 fault injection: enabled
2019/10/13 04:41:31 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/13 04:41:31 net packet injection: enabled
2019/10/13 04:41:31 net device setup: enabled
2019/10/13 04:41:31 concurrency sanitizer: enabled
syzkaller login: [ 52.982392][ T0] ==================================================================
[ 52.990521][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 52.999426][ T0]
[ 53.001735][ T0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
[ 53.009340][ T0] tick_do_update_jiffies64+0x105/0x260
[ 53.014861][ T0] tick_sched_do_timer+0xd4/0xe0
[ 53.019771][ T0] tick_sched_timer+0x43/0xe0
[ 53.024425][ T0] __hrtimer_run_queues+0x288/0x600
[ 53.029597][ T0] hrtimer_interrupt+0x22a/0x480
[ 53.034511][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 53.040035][ T0] apic_timer_interrupt+0xf/0x20
[ 53.044941][ T0]
[ 53.047248][ T0] read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 1:
[ 53.054518][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 53.060064][ T0] tick_irq_enter+0x139/0x1c0
[ 53.064717][ T0] irq_enter+0x4f/0x60
[ 53.068765][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 53.074199][ T0] apic_timer_interrupt+0xf/0x20
[ 53.079119][ T0] native_safe_halt+0xe/0x10
[ 53.083691][ T0] arch_cpu_idle+0x1f/0x30
[ 53.088084][ T0] default_idle_call+0x1e/0x40
[ 53.092830][ T0] do_idle+0x1ea/0x2c0
[ 53.096876][ T0] cpu_startup_entry+0x1b/0x20
[ 53.101617][ T0] start_secondary+0x207/0x260
[ 53.106376][ T0] secondary_startup_64+0xa4/0xb0
[ 53.111486][ T0]
[ 53.113797][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 53.119939][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 53.126673][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 53.136713][ T0] ==================================================================
[ 53.144757][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 53.151505][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 53.158260][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 53.168295][ T0] Call Trace:
[ 53.171553][ T0]
[ 53.174390][ T0] dump_stack+0xf5/0x159
[ 53.178620][ T0] panic+0x209/0x639
[ 53.182490][ T0] ? do_idle+0x1ea/0x2c0
[ 53.186716][ T0] ? vprintk_func+0x8d/0x140
[ 53.192675][ T0] kcsan_report.cold+0xc/0x1b
[ 53.197338][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 53.202859][ T0] __tsan_read8+0x2c/0x30
[ 53.207167][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 53.212622][ T0] tick_irq_enter+0x139/0x1c0
[ 53.217284][ T0] irq_enter+0x4f/0x60
[ 53.221336][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 53.226789][ T0] apic_timer_interrupt+0xf/0x20
[ 53.232830][ T0]
[ 53.235761][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 53.241111][ 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
[ 53.260702][ T0] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 53.269095][ T0] RAX: fbe76c8b4395a6bf RBX: 0000000000000001 RCX: 00000000000007b9
[ 53.277057][ T0] RDX: 000000000020b700 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 53.285004][ T0] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 53.292952][ T0] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffff88812b38f0c0
[ 53.300903][ T0] R13: ffff88812b38f0c0 R14: 0000000000000000 R15: 0000000000000000
[ 53.308867][ T0] ? default_idle+0x50/0x230
[ 53.313449][ T0] arch_cpu_idle+0x1f/0x30
[ 53.317850][ T0] default_idle_call+0x1e/0x40
[ 53.322590][ T0] do_idle+0x1ea/0x2c0
[ 53.326633][ T0] ? complete+0x44/0x50
[ 53.330779][ T0] cpu_startup_entry+0x1b/0x20
[ 53.335535][ T0] start_secondary+0x207/0x260
[ 53.340281][ T0] secondary_startup_64+0xa4/0xb0
[ 53.346599][ T0] Kernel Offset: disabled
[ 53.350922][ T0] Rebooting in 86400 seconds..