[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty1.
[  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.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.254' (ECDSA) to the list of known hosts.
2020/05/23 22:58:53 fuzzer started
2020/05/23 22:58:53 dialing manager at 10.128.0.105:46225
2020/05/23 22:58:53 syscalls: 3055
2020/05/23 22:58:53 code coverage: enabled
2020/05/23 22:58:53 comparison tracing: enabled
2020/05/23 22:58:53 extra coverage: enabled
2020/05/23 22:58:53 setuid sandbox: enabled
2020/05/23 22:58:53 namespace sandbox: enabled
2020/05/23 22:58:53 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/23 22:58:53 fault injection: enabled
2020/05/23 22:58:53 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/23 22:58:53 net packet injection: enabled
2020/05/23 22:58:53 net device setup: enabled
2020/05/23 22:58:53 concurrency sanitizer: enabled
2020/05/23 22:58:53 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/23 22:58:53 USB emulation: enabled
syzkaller login: [   51.627735][ T8936] KCSAN: could not find function: '_find_next_bit'
2020/05/23 22:58:55 adding functions to KCSAN blacklist: '_find_next_bit' 'do_exit' 'copy_process' 'mod_timer' 'ext4_free_inodes_count' 'generic_write_end' 'page_counter_charge' 'run_timer_softirq' 'ep_poll' 'ext4_mark_iloc_dirty' 'fsnotify' 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'do_nanosleep' '__ext4_new_inode' 
[   65.143482][    T0] ==================================================================
[   65.151655][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   65.160134][    T0] 
[   65.162465][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   65.170104][    T0]  tick_sched_do_timer+0xb4/0xd0
[   65.175155][    T0]  tick_sched_timer+0x3f/0xd0
[   65.179829][    T0]  __hrtimer_run_queues+0x271/0x600
[   65.185051][    T0]  hrtimer_interrupt+0x226/0x490
[   65.189989][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   65.195453][    T0]  apic_timer_interrupt+0xf/0x20
[   65.200376][    T0] 
[   65.202710][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   65.209996][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   65.215544][    T0]  do_idle+0x1ad/0x290
[   65.219612][    T0]  cpu_startup_entry+0x14/0x20
[   65.224378][    T0]  start_secondary+0x169/0x1b0
[   65.229171][    T0]  secondary_startup_64+0xa4/0xb0
[   65.234182][    T0] 
[   65.236496][    T0] Reported by Kernel Concurrency Sanitizer on:
[   65.242647][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   65.251133][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.261183][    T0] ==================================================================
[   65.269282][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   65.275954][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   65.283848][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.293902][    T0] Call Trace:
[   65.297218][    T0]  dump_stack+0x11d/0x187
[   65.301578][    T0]  panic+0x210/0x640
[   65.305491][    T0]  ? vprintk_func+0x89/0x13a
[   65.310081][    T0]  kcsan_report.cold+0xc/0x1a
[   65.314791][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   65.320282][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   65.325856][    T0]  do_idle+0x1ad/0x290
[   65.329918][    T0]  ? debug_smp_processor_id+0x3a/0x129
[   65.335357][    T0]  cpu_startup_entry+0x14/0x20
[   65.340102][    T0]  start_secondary+0x169/0x1b0
[   65.344859][    T0]  secondary_startup_64+0xa4/0xb0
[   65.351199][    T0] Kernel Offset: disabled
[   65.355530][    T0] Rebooting in 86400 seconds..