[  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 '10.128.0.4' (ECDSA) to the list of known hosts.
2020/11/27 11:58:20 fuzzer started
2020/11/27 11:58:20 connecting to host at 10.128.0.105:33515
2020/11/27 11:58:20 checking machine...
2020/11/27 11:58:20 checking revisions...
2020/11/27 11:58:20 testing simple program...
syzkaller login: [   28.861966][    T0] ==================================================================
[   28.870327][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
[   28.878496][    T0] 
[   28.880858][    T0] write to 0xffffffff86fc18d0 of 4 bytes by task 0 on cpu 1:
[   28.888253][    T0]  tick_nohz_stop_tick+0x99/0x410
[   28.893544][    T0]  tick_nohz_idle_stop_tick+0x148/0x2e0
[   28.899093][    T0]  do_idle+0x176/0x230
[   28.903213][    T0]  cpu_startup_entry+0x15/0x20
[   28.908314][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   28.914192][    T0] 
[   28.916547][    T0] read to 0xffffffff86fc18d0 of 4 bytes by task 0 on cpu 0:
[   28.923944][    T0]  tick_nohz_next_event+0x217/0x300
[   28.929137][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   28.934883][    T0]  menu_select+0x2fa/0xf40
[   28.939325][    T0]  cpuidle_select+0x3d/0x50
[   28.943821][    T0]  do_idle+0x15f/0x230
[   28.948091][    T0]  cpu_startup_entry+0x15/0x20
[   28.953464][    T0]  rest_init+0xd7/0xe0
[   28.957654][    T0]  arch_call_rest_init+0xa/0xb
[   28.963014][    T0]  start_kernel+0x5a0/0x625
[   28.968119][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   28.974189][    T0] 
[   28.976551][    T0] Reported by Kernel Concurrency Sanitizer on:
[   28.982875][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc5-syzkaller #0
[   28.991295][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.001395][    T0] ==================================================================
[   29.009706][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   29.016311][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc5-syzkaller #0
[   29.024276][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.034314][    T0] Call Trace:
[   29.037743][    T0]  dump_stack+0x116/0x15d
[   29.042093][    T0]  panic+0x1e7/0x5fa
[   29.045980][    T0]  ? vprintk_emit+0x2f2/0x370
[   29.050817][    T0]  kcsan_report+0x67b/0x680
[   29.055581][    T0]  ? kcsan_setup_watchpoint+0x46a/0x4d0
[   29.061333][    T0]  ? tick_nohz_next_event+0x217/0x300
[   29.067147][    T0]  ? tick_nohz_get_sleep_length+0x121/0x270
[   29.073591][    T0]  ? menu_select+0x2fa/0xf40
[   29.078557][    T0]  ? cpuidle_select+0x3d/0x50
[   29.083355][    T0]  ? do_idle+0x15f/0x230
[   29.087581][    T0]  ? cpu_startup_entry+0x15/0x20
[   29.092509][    T0]  ? rest_init+0xd7/0xe0
[   29.096788][    T0]  ? arch_call_rest_init+0xa/0xb
[   29.101731][    T0]  ? start_kernel+0x5a0/0x625
[   29.106785][    T0]  ? secondary_startup_64_no_verify+0xb0/0xbb
[   29.112856][    T0]  ? _raw_spin_lock_irqsave+0x25/0x90
[   29.118432][    T0]  kcsan_setup_watchpoint+0x46a/0x4d0
[   29.123794][    T0]  tick_nohz_next_event+0x217/0x300
[   29.129067][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   29.134897][    T0]  menu_select+0x2fa/0xf40
[   29.139341][    T0]  ? sched_clock+0xf/0x20
[   29.143659][    T0]  ? cpuidle_enter_state+0x54d/0x750
[   29.149143][    T0]  ? tick_nohz_idle_got_tick+0x59/0x70
[   29.154584][    T0]  cpuidle_select+0x3d/0x50
[   29.159160][    T0]  do_idle+0x15f/0x230
[   29.163392][    T0]  cpu_startup_entry+0x15/0x20
[   29.168228][    T0]  rest_init+0xd7/0xe0
[   29.172341][    T0]  ? time_init+0xc/0xc
[   29.176570][    T0]  arch_call_rest_init+0xa/0xb
[   29.181409][    T0]  start_kernel+0x5a0/0x625
[   29.186032][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   29.193202][    T0] Kernel Offset: disabled
[   29.197653][    T0] Rebooting in 86400 seconds..