[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 39.588938][ T25] audit: type=1800 audit(1570191136.205:25): pid=7124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 39.626902][ T25] audit: type=1800 audit(1570191136.205:26): pid=7124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 39.663744][ T25] audit: type=1800 audit(1570191136.205:27): pid=7124 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 '10.128.0.195' (ECDSA) to the list of known hosts.
2019/10/04 12:12:24 fuzzer started
2019/10/04 12:12:26 dialing manager at 10.128.0.105:38119
2019/10/04 12:12:26 syscalls: 2523
2019/10/04 12:12:26 code coverage: enabled
2019/10/04 12:12:26 comparison tracing: enabled
2019/10/04 12:12:26 extra coverage: extra coverage is not supported by the kernel
2019/10/04 12:12:26 setuid sandbox: enabled
2019/10/04 12:12:26 namespace sandbox: enabled
2019/10/04 12:12:26 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/04 12:12:26 fault injection: enabled
2019/10/04 12:12:26 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/04 12:12:26 net packet injection: enabled
2019/10/04 12:12:26 net device setup: enabled
2019/10/04 12:12:26 concurrency sanitizer: enabled
syzkaller login: [ 49.929986][ C0] ==================================================================
[ 49.938175][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues+0x1f2/0x600 and hrtimer_active+0x84/0x1a0
[ 49.948115][ C0]
[ 49.950423][ C0] read to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 1:
[ 49.957956][ C0] hrtimer_active+0x84/0x1a0
[ 49.962566][ C0] task_tick_fair+0x4c/0x920
[ 49.967134][ C0] scheduler_tick+0x5c/0xe0
[ 49.971625][ C0] update_process_times+0x5f/0x80
[ 49.976639][ C0] tick_sched_handle+0x75/0x100
[ 49.981466][ C0] tick_sched_timer+0x58/0xe0
[ 49.986157][ C0] __hrtimer_run_queues+0x288/0x600
[ 49.991334][ C0] hrtimer_interrupt+0x22a/0x480
[ 49.996278][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 50.001716][ C0] apic_timer_interrupt+0xf/0x20
[ 50.006639][ C0] ip_protocol_deliver_rcu+0x392/0x470
[ 50.012073][ C0] ip_local_deliver_finish+0x110/0x140
[ 50.017612][ C0] ip_local_deliver+0x133/0x210
[ 50.022439][ C0] ip_rcv_finish+0x121/0x160
[ 50.026996][ C0]
[ 50.029307][ C0] write to 0xffff88812be1d818 of 8 bytes by interrupt on cpu 0:
[ 50.036913][ C0] __hrtimer_run_queues+0x1f2/0x600
[ 50.042106][ C0] hrtimer_interrupt+0x22a/0x480
[ 50.047034][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 50.052480][ C0] apic_timer_interrupt+0xf/0x20
[ 50.057421][ C0]
[ 50.059725][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 50.065852][ C0] CPU: 0 PID: 7273 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[ 50.072933][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 50.082964][ C0] ==================================================================
[ 50.090997][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 50.097562][ C0] CPU: 0 PID: 7273 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[ 50.104686][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 50.114758][ C0] Call Trace:
[ 50.118015][ C0]
[ 50.120849][ C0] dump_stack+0xf5/0x159
[ 50.125070][ C0] panic+0x209/0x639
[ 50.128944][ C0] ? vprintk_func+0x8d/0x140
[ 50.133553][ C0] kcsan_report.cold+0x57/0xeb
[ 50.138307][ C0] __kcsan_setup_watchpoint+0x342/0x500
[ 50.143831][ C0] __tsan_write8+0x32/0x40
[ 50.148239][ C0] __hrtimer_run_queues+0x1f2/0x600
[ 50.153415][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 50.159461][ C0] hrtimer_interrupt+0x22a/0x480
[ 50.164380][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 50.169815][ C0] ? smp_reschedule_interrupt+0x71/0x1d0
[ 50.175424][ C0] apic_timer_interrupt+0xf/0x20
[ 50.180441][ C0]
[ 50.183373][ C0] RIP: 0033:0x5284fe
[ 50.187247][ C0] Code: 25 f8 ff ff ff 48 3b 61 10 0f 86 c0 00 00 00 48 83 ec 10 48 89 6c 24 08 48 8d 6c 24 08 48 8b 4c 24 18 48 c7 41 50 ff ff ff ff 0e 48 89 0c 24 e8 57 f6 ff ff 48 8b 4c 24 18 48 8b 51 28 48 8b
[ 50.206824][ C0] RSP: 002b:000000c4203bfa20 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
[ 50.215210][ C0] RAX: 000000c420314000 RBX: 000000c420314000 RCX: 000000c420072660
[ 50.223158][ C0] RDX: 000000c420072660 RSI: 0000000000000007 RDI: 0000000000000018
[ 50.231117][ C0] RBP: 000000c4203bfa28 R08: 000000c4204b4000 R09: 0000000000000009
[ 50.239085][ C0] R10: 00000000ffffffff R11: 0000000000002d64 R12: 0000000000000020
[ 50.247044][ C0] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff
[ 50.256362][ C0] Kernel Offset: disabled
[ 50.260679][ C0] Rebooting in 86400 seconds..