[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 35.662682][ T25] audit: type=1800 audit(1571063135.230:25): pid=7063 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 35.719278][ T25] audit: type=1800 audit(1571063135.230:26): pid=7063 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 35.741312][ T25] audit: type=1800 audit(1571063135.230:27): pid=7063 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 '10.128.15.208' (ECDSA) to the list of known hosts.
2019/10/14 14:25:44 fuzzer started
2019/10/14 14:25:45 dialing manager at 10.128.0.105:43961
2019/10/14 14:25:45 syscalls: 2523
2019/10/14 14:25:45 code coverage: enabled
2019/10/14 14:25:45 comparison tracing: enabled
2019/10/14 14:25:45 extra coverage: extra coverage is not supported by the kernel
2019/10/14 14:25:45 setuid sandbox: enabled
2019/10/14 14:25:45 namespace sandbox: enabled
2019/10/14 14:25:45 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/14 14:25:45 fault injection: enabled
2019/10/14 14:25:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/14 14:25:45 net packet injection: enabled
2019/10/14 14:25:45 net device setup: enabled
2019/10/14 14:25:45 concurrency sanitizer: enabled
syzkaller login: [ 46.917299][ T0] ==================================================================
[ 46.925799][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 46.934715][ T0]
[ 46.937043][ T0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
[ 46.944662][ T0] tick_do_update_jiffies64+0x105/0x260
[ 46.950890][ T0] tick_sched_do_timer+0xd4/0xe0
[ 46.955835][ T0] tick_sched_timer+0x43/0xe0
[ 46.960545][ T0] __hrtimer_run_queues+0x288/0x600
[ 46.965739][ T0] hrtimer_interrupt+0x22a/0x480
[ 46.970663][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 46.976098][ T0] apic_timer_interrupt+0xf/0x20
[ 46.981387][ T0] __kcsan_check_watchpoint+0x0/0x180
[ 46.986757][ T0] mem_cgroup_throttle_swaprate+0x85/0x2c6
[ 46.992561][ T0] mem_cgroup_try_charge_delay+0x63/0x80
[ 46.998173][ T0] __handle_mm_fault+0x17eb/0x2d00
[ 47.003262][ T0] handle_mm_fault+0x21b/0x520
[ 47.008002][ T0] __do_page_fault+0x3fb/0x9e0
[ 47.012744][ T0] do_page_fault+0x54/0x233
[ 47.017221][ T0]
[ 47.019557][ T0] read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 1:
[ 47.026820][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.032276][ T0] tick_irq_enter+0x139/0x1c0
[ 47.036946][ T0] irq_enter+0x4f/0x60
[ 47.041004][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.046453][ T0] apic_timer_interrupt+0xf/0x20
[ 47.051371][ T0] native_safe_halt+0xe/0x10
[ 47.055941][ T0] arch_cpu_idle+0x1f/0x30
[ 47.060345][ T0] default_idle_call+0x1e/0x40
[ 47.065103][ T0] do_idle+0x1ea/0x2c0
[ 47.069261][ T0] cpu_startup_entry+0x1b/0x20
[ 47.074061][ T0] start_secondary+0x207/0x260
[ 47.078805][ T0] secondary_startup_64+0xa4/0xb0
[ 47.083822][ T0]
[ 47.086130][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 47.092402][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 47.099333][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.109366][ T0] ==================================================================
[ 47.117406][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 47.124183][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 47.130920][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.140955][ T0] Call Trace:
[ 47.144219][ T0]
[ 47.147073][ T0] dump_stack+0xf5/0x159
[ 47.151301][ T0] panic+0x209/0x639
[ 47.155534][ T0] ? do_idle+0x1ea/0x2c0
[ 47.159755][ T0] ? vprintk_func+0x8d/0x140
[ 47.164329][ T0] kcsan_report.cold+0xc/0x1b
[ 47.168986][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 47.174512][ T0] __tsan_read8+0x2c/0x30
[ 47.178844][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.184284][ T0] tick_irq_enter+0x139/0x1c0
[ 47.188958][ T0] irq_enter+0x4f/0x60
[ 47.193022][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.198559][ T0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 47.204199][ T0] apic_timer_interrupt+0xf/0x20
[ 47.209133][ T0]
[ 47.212071][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 47.217440][ 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
[ 47.237021][ T0] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 47.245409][ T0] RAX: fbe76c8b43960590 RBX: 0000000000000001 RCX: 00000000000007b9
[ 47.253379][ T0] RDX: 0000000000730550 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 47.261346][ T0] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 47.269557][ T0] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffff88812b38f0c0
[ 47.277621][ T0] R13: ffff88812b38f0c0 R14: 0000000000000000 R15: 0000000000000000
[ 47.285702][ T0] ? default_idle+0x50/0x230
[ 47.290372][ T0] arch_cpu_idle+0x1f/0x30
[ 47.294888][ T0] default_idle_call+0x1e/0x40
[ 47.299764][ T0] do_idle+0x1ea/0x2c0
[ 47.303813][ T0] ? refcount_sub_and_test_checked+0xb6/0x190
[ 47.309875][ T0] ? refcount_sub_and_test_checked+0xc3/0x190
[ 47.315932][ T0] cpu_startup_entry+0x1b/0x20
[ 47.320687][ T0] start_secondary+0x207/0x260
[ 47.325454][ T0] secondary_startup_64+0xa4/0xb0
[ 47.331914][ T0] Kernel Offset: disabled
[ 47.336257][ T0] Rebooting in 86400 seconds..