[  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 '10.128.0.193' (ECDSA) to the list of known hosts.
2020/04/19 09:16:39 fuzzer started
syzkaller login: [   45.004995][ T6721] as (6721) used greatest stack depth: 10440 bytes left
2020/04/19 09:16:41 dialing manager at 10.128.0.105:41163
2020/04/19 09:16:41 syscalls: 2960
2020/04/19 09:16:41 code coverage: enabled
2020/04/19 09:16:41 comparison tracing: enabled
2020/04/19 09:16:41 extra coverage: enabled
2020/04/19 09:16:41 setuid sandbox: enabled
2020/04/19 09:16:41 namespace sandbox: enabled
2020/04/19 09:16:41 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/19 09:16:41 fault injection: enabled
2020/04/19 09:16:41 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/19 09:16:41 net packet injection: enabled
2020/04/19 09:16:41 net device setup: enabled
2020/04/19 09:16:41 concurrency sanitizer: enabled
2020/04/19 09:16:41 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/19 09:16:41 USB emulation: /dev/raw-gadget does not exist
[   46.555797][ T6729] KCSAN: could not find function: '_find_next_bit'
2020/04/19 09:16:43 adding functions to KCSAN blacklist: 'xas_clear_mark' 'find_get_pages_range_tag' 'ep_poll' '__ext4_new_inode' '_find_next_bit' 'run_timer_softirq' 'ext4_free_inodes_count' 'do_exit' 'copy_process' 'blk_mq_sched_dispatch_requests' 'ext4_mark_iloc_dirty' 'kauditd_thread' 'do_nanosleep' 'generic_write_end' 
[   67.873961][    T0] ==================================================================
[   67.882122][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   67.890279][    T0] 
[   67.892608][    T0] write to 0xffffffff85f0ef50 of 4 bytes by interrupt on cpu 0:
[   67.900685][    T0]  tick_sched_do_timer+0xb4/0xd0
[   67.905629][    T0]  tick_sched_timer+0x3f/0xd0
[   67.910306][    T0]  __hrtimer_run_queues+0x271/0x600
[   67.915504][    T0]  hrtimer_interrupt+0x226/0x490
[   67.920452][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   67.925920][    T0]  apic_timer_interrupt+0xf/0x20
[   67.930856][    T0]  __sanitizer_cov_trace_pc+0x9/0x50
[   67.936142][    T0]  debug_smp_processor_id+0x3a/0x129
[   67.941424][    T0]  ipt_do_table+0xa1c/0xe70
[   67.946161][    T0]  iptable_filter_hook+0x44/0x60
[   67.951105][    T0]  nf_hook_slow+0x7c/0x160
[   67.955526][    T0]  ip_local_deliver+0x1f2/0x220
[   67.960395][    T0]  ip_sublist_rcv_finish+0xf0/0x140
[   67.966762][    T0]  ip_sublist_rcv+0x3f8/0x530
[   67.971419][    T0]  ip_list_rcv+0x2f3/0x321
[   67.976431][    T0]  __netif_receive_skb_list_core+0x368/0x5c0
[   67.982398][    T0]  netif_receive_skb_list_internal+0x5c7/0x810
[   67.988708][    T0]  gro_normal_list.part.0+0x37/0xa0
[   67.993885][    T0]  gro_normal_one+0x14c/0x160
[   67.999235][    T0]  napi_gro_receive+0x27d/0x2f0
[   68.004092][    T0]  receive_buf+0x252/0x2ed0
[   68.008592][    T0]  virtnet_poll+0x343/0x790
[   68.013077][    T0]  net_rx_action+0x3ad/0xac0
[   68.017647][    T0]  __do_softirq+0x118/0x34a
[   68.022130][    T0]  run_ksoftirqd+0x41/0x60
[   68.026553][    T0]  smpboot_thread_fn+0x374/0x4a0
[   68.031470][    T0]  kthread+0x203/0x230
[   68.035517][    T0]  ret_from_fork+0x1f/0x30
[   68.039916][    T0] 
[   68.042240][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[   68.049509][    T0]  tick_nohz_next_event+0x181/0x340
[   68.054697][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   68.060233][    T0]  do_idle+0x1ad/0x290
[   68.064282][    T0]  cpu_startup_entry+0x14/0x20
[   68.069024][    T0]  start_secondary+0x169/0x1b0
[   68.073850][    T0]  secondary_startup_64+0xa4/0xb0
[   68.078848][    T0] 
[   68.081152][    T0] Reported by Kernel Concurrency Sanitizer on:
[   68.087283][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   68.095147][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.105178][    T0] ==================================================================
[   68.113217][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   68.119785][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   68.127657][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.137704][    T0] Call Trace:
[   68.140986][    T0]  dump_stack+0x11d/0x187
[   68.145316][    T0]  panic+0x210/0x640
[   68.149194][    T0]  ? vprintk_func+0x89/0x13a
[   68.153767][    T0]  kcsan_report.cold+0xc/0x1a
[   68.158440][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   68.163809][    T0]  tick_nohz_next_event+0x181/0x340
[   68.169001][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   68.174528][    T0]  ? ktime_get+0x1c9/0x210
[   68.178943][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   68.184383][    T0]  do_idle+0x1ad/0x290
[   68.188445][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   68.193897][    T0]  cpu_startup_entry+0x14/0x20
[   68.198642][    T0]  start_secondary+0x169/0x1b0
[   68.203392][    T0]  secondary_startup_64+0xa4/0xb0
[   68.209806][    T0] Kernel Offset: disabled
[   68.214128][    T0] Rebooting in 86400 seconds..