[  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

Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts.
2020/06/13 05:15:56 fuzzer started
2020/06/13 05:15:56 dialing manager at 10.128.0.105:39701
2020/06/13 05:16:00 syscalls: 3085
2020/06/13 05:16:00 code coverage: enabled
2020/06/13 05:16:00 comparison tracing: enabled
2020/06/13 05:16:00 extra coverage: enabled
2020/06/13 05:16:00 setuid sandbox: enabled
2020/06/13 05:16:00 namespace sandbox: enabled
2020/06/13 05:16:00 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/13 05:16:00 fault injection: enabled
2020/06/13 05:16:00 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/13 05:16:00 net packet injection: enabled
2020/06/13 05:16:00 net device setup: enabled
2020/06/13 05:16:00 concurrency sanitizer: enabled
2020/06/13 05:16:00 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/13 05:16:00 USB emulation: enabled
syzkaller login: [   55.871982][ T8912] KCSAN: could not find function: '_find_next_bit'
2020/06/13 05:16:03 adding functions to KCSAN blacklist: 'file_update_time' 'do_nanosleep' '__snd_rawmidi_transmit_ack' 'ep_poll' 'generic_fillattr' 'add_timer' 'blk_mq_sched_dispatch_requests' 'blk_mq_get_request' 'xas_clear_mark' 'alloc_pid' 'find_get_pages_range_tag' 'echo_char' '__send_signal' '_find_next_bit' '__ext4_new_inode' 'copy_process' 'run_timer_softirq' 'futex_wait_queue_me' 'kauditd_thread' 
[   85.718516][    T0] ==================================================================
[   85.726866][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   85.735351][    T0] 
[   85.738228][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   85.745873][    T0]  tick_sched_do_timer+0xb4/0xd0
[   85.750788][    T0]  tick_sched_timer+0x3f/0xd0
[   85.755527][    T0]  __hrtimer_run_queues+0x271/0x600
[   85.760836][    T0]  hrtimer_interrupt+0x226/0x490
[   85.766293][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   85.771730][    T0]  apic_timer_interrupt+0xf/0x20
[   85.776646][    T0]  write_comp_data+0x0/0x70
[   85.781143][    T0]  __sanitizer_cov_trace_switch+0x45/0x70
[   85.786843][    T0]  __read_once_size+0x20/0xd0
[   85.791867][    T0]  raw_local_deliver+0x57/0x5a4
[   85.796867][    T0]  ip_protocol_deliver_rcu+0x77/0x410
[   85.802229][    T0]  ip_local_deliver_finish+0xf3/0x120
[   85.807592][    T0]  ip_local_deliver+0x135/0x220
[   85.812423][    T0]  ip_sublist_rcv_finish+0xf0/0x140
[   85.817615][    T0]  ip_sublist_rcv+0x3f8/0x530
[   85.822295][    T0]  ip_list_rcv+0x2f3/0x321
[   85.826692][    T0]  __netif_receive_skb_list_core+0x368/0x5c0
[   85.832649][    T0]  netif_receive_skb_list_internal+0x5c7/0x810
[   85.838799][    T0]  gro_normal_list.part.0+0x37/0xa0
[   85.844077][    T0]  gro_normal_one+0x14c/0x160
[   85.848746][    T0]  napi_gro_receive+0x27d/0x2f0
[   85.853588][    T0]  receive_buf+0x24c/0x3420
[   85.858081][    T0]  virtnet_poll+0x343/0x790
[   85.862565][    T0]  net_rx_action+0x3ad/0xac0
[   85.867167][    T0]  __do_softirq+0x118/0x34a
[   85.871757][    T0]  irq_exit+0xb5/0xd0
[   85.876513][    T0]  do_IRQ+0x7b/0x120
[   85.880394][    T0]  ret_from_intr+0x0/0x21
[   85.884718][    T0]  native_safe_halt+0xe/0x10
[   85.889290][    T0]  default_idle+0x21/0x170
[   85.893791][    T0]  do_idle+0x1b7/0x290
[   85.898581][    T0]  cpu_startup_entry+0x14/0x20
[   85.903363][    T0]  rest_init+0xe4/0xeb
[   85.907414][    T0]  arch_call_rest_init+0x13/0x2b
[   85.912360][    T0]  start_kernel+0x7fe/0x823
[   85.916842][    T0]  secondary_startup_64+0xa4/0xb0
[   85.921856][    T0] 
[   85.924202][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   85.932182][    T0]  tick_nohz_next_event+0x181/0x340
[   85.937450][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   85.943013][    T0]  do_idle+0x1ad/0x290
[   85.947148][    T0]  cpu_startup_entry+0x14/0x20
[   85.951896][    T0]  start_secondary+0x169/0x1b0
[   85.956665][    T0]  secondary_startup_64+0xa4/0xb0
[   85.961671][    T0] 
[   85.964025][    T0] Reported by Kernel Concurrency Sanitizer on:
[   85.970185][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   85.978049][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   85.988177][    T0] ==================================================================
[   85.996214][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   86.002873][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   86.010941][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   86.020983][    T0] Call Trace:
[   86.024294][    T0]  dump_stack+0x11d/0x187
[   86.028634][    T0]  panic+0x210/0x640
[   86.032540][    T0]  ? vprintk_func+0x89/0x13a
[   86.037120][    T0]  kcsan_report.cold+0xc/0x1a
[   86.042138][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   86.047539][    T0]  tick_nohz_next_event+0x181/0x340
[   86.052727][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   86.058310][    T0]  ? ktime_get+0x1c9/0x210
[   86.062851][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   86.068312][    T0]  do_idle+0x1ad/0x290
[   86.072679][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   86.078144][    T0]  cpu_startup_entry+0x14/0x20
[   86.083138][    T0]  start_secondary+0x169/0x1b0
[   86.087906][    T0]  secondary_startup_64+0xa4/0xb0
[   86.094368][    T0] Kernel Offset: disabled
[   86.098692][    T0] Rebooting in 86400 seconds..