[  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 '10.128.0.102' (ECDSA) to the list of known hosts.
2020/05/26 18:14:34 fuzzer started
2020/05/26 18:14:34 dialing manager at 10.128.0.105:37123
2020/05/26 18:14:39 syscalls: 3055
2020/05/26 18:14:39 code coverage: enabled
2020/05/26 18:14:39 comparison tracing: enabled
2020/05/26 18:14:39 extra coverage: enabled
2020/05/26 18:14:39 setuid sandbox: enabled
2020/05/26 18:14:39 namespace sandbox: enabled
2020/05/26 18:14:39 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/26 18:14:39 fault injection: enabled
2020/05/26 18:14:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/26 18:14:39 net packet injection: enabled
2020/05/26 18:14:39 net device setup: enabled
2020/05/26 18:14:39 concurrency sanitizer: enabled
2020/05/26 18:14:39 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/26 18:14:39 USB emulation: enabled
syzkaller login: [   58.461250][ T8913] KCSAN: could not find function: '_find_next_bit'
2020/05/26 18:14:42 adding functions to KCSAN blacklist: 'generic_fillattr' 'ext4_mark_iloc_dirty' 'page_counter_charge' 'copy_process' 'ep_poll' 'do_signal_stop' '__ext4_new_inode' 'mod_timer' 'echo_char' 'ext4_free_inodes_count' 'xas_clear_mark' 'dd_has_work' 'add_timer' 'hrtimer_interrupt' '_find_next_bit' '__add_to_page_cache_locked' 'find_get_pages_range_tag' 'blk_mq_dispatch_rq_list' 'generic_write_end' '__mpage_writepage' 'do_nanosleep' 
[  111.620394][    T0] ==================================================================
[  111.628556][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[  111.637047][    T0] 
[  111.639399][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[  111.647034][    T0]  tick_sched_do_timer+0xb4/0xd0
[  111.651972][    T0]  tick_sched_timer+0x3f/0xd0
[  111.656649][    T0]  __hrtimer_run_queues+0x271/0x600
[  111.661846][    T0]  hrtimer_interrupt+0x226/0x490
[  111.666792][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[  111.672251][    T0]  apic_timer_interrupt+0xf/0x20
[  111.677173][    T0] 
[  111.679514][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  111.686803][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  111.692353][    T0]  do_idle+0x1ad/0x290
[  111.696421][    T0]  cpu_startup_entry+0x14/0x20
[  111.701184][    T0]  start_secondary+0x169/0x1b0
[  111.705947][    T0]  secondary_startup_64+0xa4/0xb0
[  111.710957][    T0] 
[  111.713276][    T0] Reported by Kernel Concurrency Sanitizer on:
[  111.719426][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  111.727303][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  111.737361][    T0] ==================================================================
[  111.745566][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  111.752154][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  111.760037][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  111.770087][    T0] Call Trace:
[  111.773384][    T0]  dump_stack+0x11d/0x187
[  111.777716][    T0]  panic+0x210/0x640
[  111.781631][    T0]  ? vprintk_func+0x89/0x13a
[  111.786218][    T0]  kcsan_report.cold+0xc/0x1a
[  111.790902][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  111.796286][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  111.801835][    T0]  do_idle+0x1ad/0x290
[  111.805901][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  111.811358][    T0]  cpu_startup_entry+0x14/0x20
[  111.816120][    T0]  start_secondary+0x169/0x1b0
[  111.820884][    T0]  secondary_startup_64+0xa4/0xb0
[  111.827327][    T0] Kernel Offset: disabled
[  111.831698][    T0] Rebooting in 86400 seconds..