[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 35.935013][ T26] audit: type=1800 audit(1571348667.841:25): pid=7069 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 35.954747][ T26] audit: type=1800 audit(1571348667.841:26): pid=7069 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 35.979480][ T26] audit: type=1800 audit(1571348667.841:27): pid=7069 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 '10.128.0.51' (ECDSA) to the list of known hosts.
2019/10/17 21:44:37 fuzzer started
2019/10/17 21:44:39 dialing manager at 10.128.0.105:43535
2019/10/17 21:44:39 syscalls: 2524
2019/10/17 21:44:39 code coverage: enabled
2019/10/17 21:44:39 comparison tracing: enabled
2019/10/17 21:44:39 extra coverage: extra coverage is not supported by the kernel
2019/10/17 21:44:39 setuid sandbox: enabled
2019/10/17 21:44:39 namespace sandbox: enabled
2019/10/17 21:44:39 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/17 21:44:39 fault injection: enabled
2019/10/17 21:44:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/17 21:44:39 net packet injection: enabled
2019/10/17 21:44:39 net device setup: enabled
2019/10/17 21:44:39 concurrency sanitizer: enabled
syzkaller login: [ 47.253124][ T0] ==================================================================
[ 47.261251][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 47.270200][ T0]
[ 47.272528][ T0] write to 0xffffffff86042008 of 8 bytes by interrupt on cpu 0:
[ 47.280134][ T0] tick_do_update_jiffies64+0x105/0x260
[ 47.285656][ T0] tick_sched_do_timer+0xd4/0xe0
[ 47.290670][ T0] tick_sched_timer+0x43/0xe0
[ 47.295329][ T0] __hrtimer_run_queues+0x288/0x600
[ 47.300588][ T0] hrtimer_interrupt+0x22a/0x480
[ 47.305504][ T0] smp_apic_timer_interrupt+0xdc/0x280
[ 47.310951][ T0] apic_timer_interrupt+0xf/0x20
[ 47.315864][ T0]
[ 47.318174][ T0] read to 0xffffffff86042008 of 8 bytes by task 0 on cpu 1:
[ 47.325440][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.330887][ T0] tick_irq_enter+0x139/0x1c0
[ 47.335541][ T0] irq_enter+0x4f/0x60
[ 47.339587][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.345031][ T0] apic_timer_interrupt+0xf/0x20
[ 47.349954][ T0] native_safe_halt+0xe/0x10
[ 47.354531][ T0] arch_cpu_idle+0x1f/0x30
[ 47.358922][ T0] default_idle_call+0x1e/0x40
[ 47.363674][ T0] do_idle+0x1af/0x280
[ 47.367715][ T0] cpu_startup_entry+0x1b/0x20
[ 47.372542][ T0] start_secondary+0x208/0x260
[ 47.377281][ T0] secondary_startup_64+0xa4/0xb0
[ 47.382272][ T0]
[ 47.384571][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 47.390696][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc3+ #0
[ 47.397799][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.407840][ T0] ==================================================================
[ 47.415973][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 47.422535][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc3+ #0
[ 47.429612][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 47.439641][ T0] Call Trace:
[ 47.442900][ T0]
[ 47.445733][ T0] dump_stack+0xf5/0x159
[ 47.449954][ T0] panic+0x210/0x640
[ 47.453838][ T0] ? do_idle+0x1af/0x280
[ 47.458062][ T0] ? vprintk_func+0x8d/0x140
[ 47.462647][ T0] kcsan_report.cold+0xc/0x10
[ 47.467328][ T0] __kcsan_setup_watchpoint+0x32e/0x4a0
[ 47.472865][ T0] __tsan_read8+0x2c/0x30
[ 47.477186][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 47.482651][ T0] tick_irq_enter+0x139/0x1c0
[ 47.487341][ T0] irq_enter+0x4f/0x60
[ 47.491392][ T0] smp_apic_timer_interrupt+0x55/0x280
[ 47.496830][ T0] ? do_IRQ+0xcb/0x180
[ 47.500890][ T0] apic_timer_interrupt+0xf/0x20
[ 47.505799][ T0]
[ 47.508719][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 47.514092][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d fc b2 4b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d ec b2 4b 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 72 12 a4 fc e8 6d 8e b8 fd 0f
[ 47.533681][ T0] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 47.542087][ T0] RAX: fbe76c8b43958f82 RBX: ffff88812b3850c0 RCX: 00000000000007b9
[ 47.550122][ T0] RDX: 00000000000c8af0 RSI: 020c49ba5e353f7d RDI: ffffffff85a563b8
[ 47.558071][ T0] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a563bf
[ 47.566019][ T0] R10: 00000000aaaaaaab R11: ffffffff86045cc8 R12: 0000000000000001
[ 47.573967][ T0] R13: ffff88812b3850c0 R14: 0000000000000000 R15: 0000000000000000
[ 47.581933][ T0] ? default_idle+0x50/0x230
[ 47.586527][ T0] arch_cpu_idle+0x1f/0x30
[ 47.590925][ T0] default_idle_call+0x1e/0x40
[ 47.595665][ T0] do_idle+0x1af/0x280
[ 47.599708][ T0] ? complete+0x44/0x50
[ 47.603841][ T0] cpu_startup_entry+0x1b/0x20
[ 47.608597][ T0] start_secondary+0x208/0x260
[ 47.613339][ T0] secondary_startup_64+0xa4/0xb0
[ 47.619616][ T0] Kernel Offset: disabled
[ 47.624108][ T0] Rebooting in 86400 seconds..