[ 35.170416][ T26] audit: type=1800 audit(1571045496.079:24): pid=7263 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2487 res=0
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 35.484468][ T26] audit: type=1800 audit(1571045496.489:25): pid=7263 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 35.505027][ T26] audit: type=1800 audit(1571045496.489:26): pid=7263 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 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 '10.128.1.39' (ECDSA) to the list of known hosts.
2019/10/14 09:31:44 fuzzer started
2019/10/14 09:31:45 dialing manager at 10.128.0.105:43961
2019/10/14 09:31:46 syscalls: 2523
2019/10/14 09:31:46 code coverage: enabled
2019/10/14 09:31:46 comparison tracing: enabled
2019/10/14 09:31:46 extra coverage: extra coverage is not supported by the kernel
2019/10/14 09:31:46 setuid sandbox: enabled
2019/10/14 09:31:46 namespace sandbox: enabled
2019/10/14 09:31:46 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/14 09:31:46 fault injection: enabled
2019/10/14 09:31:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/14 09:31:46 net packet injection: enabled
2019/10/14 09:31:46 net device setup: enabled
2019/10/14 09:31:46 concurrency sanitizer: enabled
syzkaller login: [ 46.980194][ T0] ==================================================================
[ 46.988346][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 46.998047][ T0]
[ 47.000390][ T0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1:
[ 47.009690][ T0] tick_do_update_jiffies64+0x105/0x260
[ 47.017270][ T0] tick_sched_do_timer+0xd4/0xe0
[ 47.022901][ T0] tick_sched_timer+0x43/0xe0
[ 47.030005][ T0] __hrtimer_run_queues+0x288/0x600
[ 47.037417][ T0] hrtimer_interrupt+0x22a/0x480
[ 47.043193][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 47.050231][ T0] apic_timer_interrupt+0xf/0x20
[ 47.055169][ T0] __kcsan_setup_watchpoint+0x282/0x510
[ 47.060709][ T0] __tsan_read8+0x2c/0x30
[ 47.065314][ T0] get_page_from_freelist+0x146/0x2300
[ 47.070777][ T0] __alloc_pages_nodemask+0x255/0x4d0
[ 47.076147][ T0] alloc_pages_current+0xd1/0x170
[ 47.082119][ T0] __page_cache_alloc+0x183/0x1a0
[ 47.087175][ T0] __do_page_cache_readahead+0x13e/0x390
[ 47.092796][ T0]
[ 47.095123][ T0] read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 0:
[ 47.103798][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.109274][ T0] tick_irq_enter+0x139/0x1c0
[ 47.113941][ T0] irq_enter+0x4f/0x60
[ 47.118020][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.126078][ T0] apic_timer_interrupt+0xf/0x20
[ 47.131010][ T0] native_safe_halt+0xe/0x10
[ 47.135599][ T0] arch_cpu_idle+0x1f/0x30
[ 47.140014][ T0] default_idle_call+0x1e/0x40
[ 47.149631][ T0] do_idle+0x1ea/0x2c0
[ 47.157085][ T0] cpu_startup_entry+0x1b/0x20
[ 47.161842][ T0] rest_init+0xec/0xf6
[ 47.165910][ T0] arch_call_rest_init+0x17/0x37
[ 47.170846][ T0] start_kernel+0x83e/0x864
[ 47.175341][ T0]
[ 47.177657][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 47.183807][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0
[ 47.190558][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.201573][ T0] ==================================================================
[ 47.209631][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 47.216212][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0
[ 47.224001][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.236843][ T0] Call Trace:
[ 47.240134][ T0]
[ 47.243076][ T0] dump_stack+0xf5/0x159
[ 47.247316][ T0] panic+0x209/0x639
[ 47.251208][ T0] ? do_idle+0x1ea/0x2c0
[ 47.255618][ T0] ? vprintk_func+0x8d/0x140
[ 47.262293][ T0] kcsan_report.cold+0xc/0x1b
[ 47.266978][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 47.272527][ T0] __tsan_read8+0x2c/0x30
[ 47.276878][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.282427][ T0] tick_irq_enter+0x139/0x1c0
[ 47.287099][ T0] irq_enter+0x4f/0x60
[ 47.291163][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.296711][ T0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 47.302363][ T0] apic_timer_interrupt+0xf/0x20
[ 47.307287][ T0]
[ 47.310225][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 47.316284][ 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
[ 47.335966][ T0] RSP: 0018:ffffffff85a03de0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 47.344366][ T0] RAX: fbe76c8b4395be68 RBX: 0000000000000000 RCX: 00000000000007b9
[ 47.352329][ T0] RDX: 00000000003540d0 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 47.360291][ T0] RBP: ffffffff85a03e18 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 47.368251][ T0] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffffffff85a2b780
[ 47.376210][ T0] R13: ffffffff85a2b780 R14: 0000000000000000 R15: 0000000000000000
[ 47.384205][ T0] ? default_idle+0x50/0x230
[ 47.388795][ T0] arch_cpu_idle+0x1f/0x30
[ 47.393207][ T0] default_idle_call+0x1e/0x40
[ 47.397965][ T0] do_idle+0x1ea/0x2c0
[ 47.402033][ T0] cpu_startup_entry+0x1b/0x20
[ 47.406793][ T0] rest_init+0xec/0xf6
[ 47.410851][ T0] ? trace_event_define_fields_vector_free_moved+0xce/0xce
[ 47.418046][ T0] arch_call_rest_init+0x17/0x37
[ 47.422983][ T0] start_kernel+0x83e/0x864
[ 47.427490][ T0] x86_64_start_reservations+0x29/0x2b
[ 47.432965][ T0] x86_64_start_kernel+0x72/0x76
[ 47.437897][ T0] secondary_startup_64+0xa4/0xb0
[ 47.444131][ T0] Kernel Offset: disabled
[ 47.448470][ T0] Rebooting in 86400 seconds..