INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts.
2019/10/13 18:01:55 fuzzer started
2019/10/13 18:01:57 dialing manager at 10.128.0.105:40973
2019/10/13 18:01:57 syscalls: 2523
2019/10/13 18:01:57 code coverage: enabled
2019/10/13 18:01:57 comparison tracing: enabled
2019/10/13 18:01:57 extra coverage: extra coverage is not supported by the kernel
2019/10/13 18:01:57 setuid sandbox: enabled
2019/10/13 18:01:57 namespace sandbox: enabled
2019/10/13 18:01:57 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/13 18:01:57 fault injection: enabled
2019/10/13 18:01:57 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/13 18:01:57 net packet injection: enabled
2019/10/13 18:01:57 net device setup: enabled
2019/10/13 18:01:57 concurrency sanitizer: enabled
syzkaller login: [   56.336271][    C0] ==================================================================
[   56.344412][    C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[   56.352457][    C0] 
[   56.354790][    C0] read to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 1:
[   56.362313][    C0]  tick_sched_do_timer+0x33/0xe0
[   56.367229][    C0]  tick_sched_timer+0x43/0xe0
[   56.371883][    C0]  __hrtimer_run_queues+0x288/0x600
[   56.377072][    C0]  hrtimer_interrupt+0x22a/0x480
[   56.381987][    C0]  smp_apic_timer_interrupt+0xdc/0x280
[   56.387419][    C0]  apic_timer_interrupt+0xf/0x20
[   56.392330][    C0]  ip_rcv_core.isra.0+0x221/0x680
[   56.397329][    C0]  ip_rcv+0x5a/0x1a0
[   56.401198][    C0]  __netif_receive_skb_one_core+0xa7/0xe0
[   56.406891][    C0]  __netif_receive_skb+0x37/0xf0
[   56.411804][    C0]  netif_receive_skb_internal+0x59/0x190
[   56.417409][    C0]  napi_gro_receive+0x28f/0x330
[   56.422234][    C0]  receive_buf+0x284/0x30b0
[   56.426710][    C0]  virtnet_poll+0x436/0x7d0
[   56.431200][    C0] 
[   56.433528][    C0] write to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 0:
[   56.441134][    C0]  tick_sched_do_timer+0xc0/0xe0
[   56.446061][    C0]  tick_sched_timer+0x43/0xe0
[   56.450719][    C0]  __hrtimer_run_queues+0x288/0x600
[   56.455892][    C0]  hrtimer_interrupt+0x22a/0x480
[   56.460819][    C0]  smp_apic_timer_interrupt+0xdc/0x280
[   56.466255][    C0]  apic_timer_interrupt+0xf/0x20
[   56.471176][    C0] 
[   56.473479][    C0] Reported by Kernel Concurrency Sanitizer on:
[   56.479611][    C0] CPU: 0 PID: 7250 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   56.486689][    C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.496719][    C0] ==================================================================
[   56.504754][    C0] Kernel panic - not syncing: panic_on_warn set ...
[   56.511329][    C0] CPU: 0 PID: 7250 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   56.518409][    C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.528436][    C0] Call Trace:
[   56.531695][    C0]  <IRQ>
[   56.534529][    C0]  dump_stack+0xf5/0x159
[   56.538767][    C0]  panic+0x209/0x639
[   56.542640][    C0]  ? vprintk_func+0x8d/0x140
[   56.547206][    C0]  kcsan_report.cold+0xc/0x1b
[   56.551859][    C0]  __kcsan_setup_watchpoint+0x3ee/0x510
[   56.557421][    C0]  __tsan_write4+0x32/0x40
[   56.561819][    C0]  tick_sched_do_timer+0xc0/0xe0
[   56.566745][    C0]  tick_sched_timer+0x43/0xe0
[   56.571403][    C0]  __hrtimer_run_queues+0x288/0x600
[   56.576579][    C0]  ? tick_sched_do_timer+0xe0/0xe0
[   56.581672][    C0]  hrtimer_interrupt+0x22a/0x480
[   56.586592][    C0]  smp_apic_timer_interrupt+0xdc/0x280
[   56.592029][    C0]  apic_timer_interrupt+0xf/0x20
[   56.596936][    C0]  </IRQ>
[   56.599853][    C0] RIP: 0033:0x609a2e
[   56.603726][    C0] Code: 48 8b 4c 24 08 48 85 c9 74 d0 48 c7 44 24 50 00 00 00 00 48 89 4c 24 58 48 89 44 24 60 48 8b 6c 24 30 48 83 c4 38 c3 8b 53 18 <89> d7 81 e2 ff 01 00 00 8b 54 90 08 41 89 d0 83 e2 0f 48 83 fa 09
[   56.623304][    C0] RSP: 002b:000000c4203a3a78 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
[   56.631706][    C0] RAX: 000000c4204a2028 RBX: 000000c4204a2000 RCX: 0000000000000000
[   56.639652][    C0] RDX: 0000000000031817 RSI: 0000000000000012 RDI: 00000000000000a6
[   56.647613][    C0] RBP: 000000c4203a3aa8 R08: 000000c4204a8000 R09: 0000000000000017
[   56.655562][    C0] R10: 00000000ffffffff R11: 00000000000015af R12: 0000000000000008
[   56.663522][    C0] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff
[   56.672869][    C0] Kernel Offset: disabled
[   56.677190][    C0] Rebooting in 86400 seconds..