[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

syzkaller login: [   37.528337][ T6656] bash (6656) used greatest stack depth: 10440 bytes left
Warning: Permanently added '10.128.0.149' (ECDSA) to the list of known hosts.
2020/04/18 15:04:27 fuzzer started
2020/04/18 15:04:29 dialing manager at 10.128.0.105:45083
2020/04/18 15:04:30 syscalls: 2960
2020/04/18 15:04:30 code coverage: enabled
2020/04/18 15:04:30 comparison tracing: enabled
2020/04/18 15:04:30 extra coverage: enabled
2020/04/18 15:04:30 setuid sandbox: enabled
2020/04/18 15:04:30 namespace sandbox: enabled
2020/04/18 15:04:30 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/18 15:04:30 fault injection: enabled
2020/04/18 15:04:30 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/18 15:04:30 net packet injection: enabled
2020/04/18 15:04:30 net device setup: enabled
2020/04/18 15:04:30 concurrency sanitizer: enabled
2020/04/18 15:04:30 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/18 15:04:30 USB emulation: /dev/raw-gadget does not exist
[   49.517648][ T6702] KCSAN: could not find function: '_find_next_bit'
2020/04/18 15:04:31 adding functions to KCSAN blacklist: '_find_next_bit' 'run_timer_softirq' 'ep_poll' 'mod_timer' 'do_nanosleep' 'find_get_pages_range_tag' 'copy_process' 
[   51.957884][    T0] ==================================================================
[   51.966046][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   51.974537][    T0] 
[   51.976872][    T0] write to 0xffffffff85f0ef50 of 4 bytes by interrupt on cpu 0:
[   51.984512][    T0]  tick_sched_do_timer+0xb4/0xd0
[   51.989449][    T0]  tick_sched_timer+0x3f/0xd0
[   51.994276][    T0]  __hrtimer_run_queues+0x271/0x600
[   51.999465][    T0]  hrtimer_interrupt+0x226/0x490
[   52.004417][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   52.009912][    T0]  apic_timer_interrupt+0xf/0x20
[   52.014954][    T0]  __sanitizer_cov_trace_const_cmp4+0x4/0x20
[   52.020925][    T0]  ipv4_confirm+0x57/0x150
[   52.025324][    T0]  nf_hook_slow+0x7c/0x160
[   52.029724][    T0]  ip_local_deliver+0x1f2/0x220
[   52.034563][    T0]  ip_sublist_rcv_finish+0xf0/0x140
[   52.039746][    T0]  ip_sublist_rcv+0x3f8/0x530
[   52.044403][    T0]  ip_list_rcv+0x2f3/0x321
[   52.048805][    T0]  __netif_receive_skb_list_core+0x368/0x5c0
[   52.054794][    T0]  netif_receive_skb_list_internal+0x5c7/0x810
[   52.060942][    T0]  gro_normal_list.part.0+0x37/0xa0
[   52.066289][    T0]  gro_normal_one+0x14c/0x160
[   52.071038][    T0]  napi_gro_receive+0x27d/0x2f0
[   52.075879][    T0]  receive_buf+0x252/0x2ed0
[   52.080369][    T0]  virtnet_poll+0x343/0x790
[   52.084872][    T0]  net_rx_action+0x3ad/0xac0
[   52.089467][    T0]  __do_softirq+0x118/0x34a
[   52.093954][    T0]  run_ksoftirqd+0x41/0x60
[   52.098420][    T0]  smpboot_thread_fn+0x374/0x4a0
[   52.103416][    T0]  kthread+0x203/0x230
[   52.107473][    T0]  ret_from_fork+0x1f/0x30
[   52.111935][    T0] 
[   52.114254][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[   52.121573][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   52.127107][    T0]  do_idle+0x1ad/0x290
[   52.131156][    T0]  cpu_startup_entry+0x14/0x20
[   52.135899][    T0]  start_secondary+0x169/0x1b0
[   52.140644][    T0]  secondary_startup_64+0xa4/0xb0
[   52.145639][    T0] 
[   52.147948][    T0] Reported by Kernel Concurrency Sanitizer on:
[   52.154132][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   52.161997][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.172034][    T0] ==================================================================
[   52.180077][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   52.186650][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   52.194515][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.204562][    T0] Call Trace:
[   52.207905][    T0]  dump_stack+0x11d/0x187
[   52.212255][    T0]  panic+0x210/0x640
[   52.216153][    T0]  ? vprintk_func+0x89/0x13a
[   52.220794][    T0]  kcsan_report.cold+0xc/0x1a
[   52.225468][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   52.230833][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   52.236367][    T0]  do_idle+0x1ad/0x290
[   52.240423][    T0]  cpu_startup_entry+0x14/0x20
[   52.245183][    T0]  start_secondary+0x169/0x1b0
[   52.249943][    T0]  secondary_startup_64+0xa4/0xb0
[   52.256155][    T0] Kernel Offset: disabled
[   52.260493][    T0] Rebooting in 86400 seconds..