[  OK  ] Started Getty on tty3.
[  OK  ] Started Getty on tty2.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty1.
[  OK  ] Reached target Login Prompts.
[  OK  ] Started OpenBSD Secure Shell server.
[  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 '10.128.0.74' (ECDSA) to the list of known hosts.
2020/06/15 08:56:30 fuzzer started
2020/06/15 08:56:31 dialing manager at 10.128.0.105:32959
2020/06/15 08:56:35 syscalls: 3085
2020/06/15 08:56:35 code coverage: enabled
2020/06/15 08:56:35 comparison tracing: enabled
2020/06/15 08:56:35 extra coverage: enabled
2020/06/15 08:56:35 setuid sandbox: enabled
2020/06/15 08:56:35 namespace sandbox: enabled
2020/06/15 08:56:35 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/15 08:56:35 fault injection: enabled
2020/06/15 08:56:35 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/15 08:56:35 net packet injection: enabled
2020/06/15 08:56:35 net device setup: enabled
2020/06/15 08:56:35 concurrency sanitizer: enabled
2020/06/15 08:56:35 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/15 08:56:35 USB emulation: enabled
syzkaller login: [   56.774694][ T8920] KCSAN: could not find function: '_find_next_bit'
2020/06/15 08:56:37 suppressing KCSAN reports in functions: 'complete_signal' 'copy_process' 'generic_write_end' 'xas_clear_mark' 'decrypt_packet' '__ext4_new_inode' 'generic_file_read_iter' 'run_timer_softirq' 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'pcpu_alloc' 'futex_wait_queue_me' 'kauditd_thread' 'ep_poll' '_find_next_bit' 'blk_mq_get_request' '__mpage_writepage' 'file_update_time' 'page_counter_charge' 'tick_nohz_idle_stop_tick' 'alloc_pid' 
[   57.545302][    T0] ==================================================================
[   57.553431][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer
[   57.561559][    T0] 
[   57.563883][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[   57.571554][    T0]  tick_sched_do_timer+0xb4/0xd0
[   57.576518][    T0]  tick_sched_timer+0x3f/0xd0
[   57.581166][    T0]  __hrtimer_run_queues+0x271/0x600
[   57.586356][    T0]  hrtimer_interrupt+0x226/0x490
[   57.591302][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   57.596764][    T0]  apic_timer_interrupt+0xf/0x20
[   57.601686][    T0] 
[   57.604019][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   57.611299][    T0]  tick_nohz_next_event+0x181/0x340
[   57.616502][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   57.622039][    T0]  do_idle+0x1ad/0x290
[   57.626105][    T0]  cpu_startup_entry+0x14/0x20
[   57.630855][    T0]  rest_init+0xe4/0xeb
[   57.634902][    T0]  arch_call_rest_init+0x13/0x2b
[   57.639863][    T0]  start_kernel+0x7fe/0x823
[   57.644361][    T0]  secondary_startup_64+0xa4/0xb0
[   57.649473][    T0] 
[   57.651776][    T0] Reported by Kernel Concurrency Sanitizer on:
[   57.657934][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   57.665810][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.675876][    T0] ==================================================================
[   57.683910][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   57.690487][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[   57.698366][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.708408][    T0] Call Trace:
[   57.711689][    T0]  dump_stack+0x11d/0x187
[   57.716013][    T0]  panic+0x210/0x640
[   57.719902][    T0]  ? vprintk_func+0x89/0x13a
[   57.724488][    T0]  kcsan_report.cold+0xc/0x1a
[   57.729163][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   57.734544][    T0]  tick_nohz_next_event+0x181/0x340
[   57.739751][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   57.745286][    T0]  ? ktime_get+0x1c9/0x210
[   57.749694][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   57.755151][    T0]  do_idle+0x1ad/0x290
[   57.759219][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   57.764682][    T0]  cpu_startup_entry+0x14/0x20
[   57.769475][    T0]  rest_init+0xe4/0xeb
[   57.773535][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   57.779774][    T0]  arch_call_rest_init+0x13/0x2b
[   57.784704][    T0]  start_kernel+0x7fe/0x823
[   57.789214][    T0]  secondary_startup_64+0xa4/0xb0
[   57.794769][    T0] Kernel Offset: disabled
[   57.799082][    T0] Rebooting in 86400 seconds..