[  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 '10.128.0.4' (ECDSA) to the list of known hosts.
2020/06/11 16:51:21 fuzzer started
2020/06/11 16:51:22 dialing manager at 10.128.0.105:39743
2020/06/11 16:51:22 syscalls: 3078
2020/06/11 16:51:22 code coverage: enabled
2020/06/11 16:51:22 comparison tracing: enabled
2020/06/11 16:51:22 extra coverage: enabled
2020/06/11 16:51:22 setuid sandbox: enabled
2020/06/11 16:51:22 namespace sandbox: enabled
2020/06/11 16:51:22 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/11 16:51:22 fault injection: enabled
2020/06/11 16:51:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/11 16:51:22 net packet injection: enabled
2020/06/11 16:51:22 net device setup: enabled
2020/06/11 16:51:22 concurrency sanitizer: enabled
2020/06/11 16:51:22 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/11 16:51:22 USB emulation: enabled
syzkaller login: [   51.701875][ T8947] KCSAN: could not find function: '_find_next_bit'
2020/06/11 16:51:24 adding functions to KCSAN blacklist: 'shmem_add_to_page_cache' '_find_next_bit' 'complete_signal' 'generic_write_end' 'blk_mq_get_request' 'generic_fillattr' 'echo_char' 'find_get_pages_range_tag' 'xas_clear_mark' 'do_syslog' '__send_signal' 'mod_timer' 'pcpu_alloc' 'copy_process' 'run_timer_softirq' 'ep_poll' 'do_nanosleep' '__ext4_new_inode' 'blk_mq_sched_dispatch_requests' 
[   77.923531][    T0] ==================================================================
[   77.931768][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[   77.940460][    T0] 
[   77.942901][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[   77.951815][    T0]  tick_sched_do_timer+0xb4/0xd0
[   77.956734][    T0]  tick_sched_timer+0x3f/0xd0
[   77.961401][    T0]  __hrtimer_run_queues+0x271/0x600
[   77.966576][    T0]  hrtimer_interrupt+0x226/0x490
[   77.971491][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[   77.976947][    T0]  apic_timer_interrupt+0xf/0x20
[   77.982139][    T0] 
[   77.984449][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   77.991724][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   77.998498][    T0]  do_idle+0x1ad/0x290
[   78.002647][    T0]  cpu_startup_entry+0x14/0x20
[   78.007404][    T0]  start_secondary+0x169/0x1b0
[   78.012168][    T0]  secondary_startup_64+0xa4/0xb0
[   78.017688][    T0] 
[   78.020084][    T0] Reported by Kernel Concurrency Sanitizer on:
[   78.026405][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   78.034453][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   78.044567][    T0] ==================================================================
[   78.052872][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   78.059648][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   78.067531][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   78.077651][    T0] Call Trace:
[   78.081026][    T0]  dump_stack+0x11d/0x187
[   78.085354][    T0]  panic+0x210/0x640
[   78.089249][    T0]  ? vprintk_func+0x89/0x13a
[   78.093833][    T0]  kcsan_report.cold+0xc/0x1a
[   78.098580][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   78.104184][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   78.109819][    T0]  do_idle+0x1ad/0x290
[   78.113985][    T0]  cpu_startup_entry+0x14/0x20
[   78.118741][    T0]  start_secondary+0x169/0x1b0
[   78.123515][    T0]  secondary_startup_64+0xa4/0xb0
[   78.129915][    T0] Kernel Offset: disabled
[   78.134395][    T0] Rebooting in 86400 seconds..