[  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 '10.128.0.108' (ECDSA) to the list of known hosts.
2020/06/13 12:38:09 fuzzer started
2020/06/13 12:38:10 dialing manager at 10.128.0.105:43693
2020/06/13 12:38:19 syscalls: 3085
2020/06/13 12:38:19 code coverage: enabled
2020/06/13 12:38:19 comparison tracing: enabled
2020/06/13 12:38:19 extra coverage: enabled
2020/06/13 12:38:19 setuid sandbox: enabled
2020/06/13 12:38:19 namespace sandbox: enabled
2020/06/13 12:38:19 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/13 12:38:19 fault injection: enabled
2020/06/13 12:38:19 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/13 12:38:19 net packet injection: enabled
2020/06/13 12:38:19 net device setup: enabled
2020/06/13 12:38:19 concurrency sanitizer: enabled
2020/06/13 12:38:19 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/13 12:38:19 USB emulation: enabled
syzkaller login: [   61.933492][ T8920] KCSAN: could not find function: '_find_next_bit'
2020/06/13 12:38:22 adding functions to KCSAN blacklist: 'copy_process' 'run_timer_softirq' 'file_update_time' 'find_get_pages_range_tag' '_find_next_bit' '__ext4_new_inode' 'ep_poll' '__send_signal' 'do_nanosleep' 'generic_fillattr' 'xprt_connect' 'ktime_get_seconds' 'blk_mq_dispatch_rq_list' 'xas_clear_mark' 'futex_wait_queue_me' 'mod_timer' 'ktime_get_real_seconds' 'ext4_free_inodes_count' 'generic_write_end' 'pcpu_alloc' 'page_counter_charge' 'ext4_mark_iloc_dirty' 'echo_char' 
[  109.359782][    T0] ==================================================================
[  109.367901][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  109.376812][    T0] 
[  109.379128][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[  109.386502][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  109.394476][    T0]  do_idle+0x1ad/0x290
[  109.398558][    T0]  cpu_startup_entry+0x14/0x20
[  109.403309][    T0]  rest_init+0xe4/0xeb
[  109.407368][    T0]  arch_call_rest_init+0x13/0x2b
[  109.412294][    T0]  start_kernel+0x7fe/0x823
[  109.416792][    T0]  secondary_startup_64+0xa4/0xb0
[  109.421795][    T0] 
[  109.424125][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  109.431397][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  109.436918][    T0]  do_idle+0x1ad/0x290
[  109.440961][    T0]  cpu_startup_entry+0x14/0x20
[  109.445700][    T0]  start_secondary+0x169/0x1b0
[  109.450439][    T0]  secondary_startup_64+0xa4/0xb0
[  109.455426][    T0] 
[  109.457724][    T0] Reported by Kernel Concurrency Sanitizer on:
[  109.463952][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  109.471811][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  109.481859][    T0] ==================================================================
[  109.489918][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  109.496493][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  109.504404][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  109.514432][    T0] Call Trace:
[  109.517705][    T0]  dump_stack+0x11d/0x187
[  109.522016][    T0]  panic+0x210/0x640
[  109.525889][    T0]  ? vprintk_func+0x89/0x13a
[  109.530456][    T0]  kcsan_report.cold+0xc/0x1a
[  109.535114][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  109.540467][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  109.546002][    T0]  do_idle+0x1ad/0x290
[  109.550076][    T0]  cpu_startup_entry+0x14/0x20
[  109.554823][    T0]  start_secondary+0x169/0x1b0
[  109.559570][    T0]  secondary_startup_64+0xa4/0xb0
[  109.565845][    T0] Kernel Offset: disabled
[  109.570159][    T0] Rebooting in 86400 seconds..