[  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.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.


Debian GNU/Linux 9 syzkaller ttyS0

syzkaller login: [   44.878691][ T8854] sshd (8854) used greatest stack depth: 10840 bytes left
Warning: Permanently added '10.128.0.254' (ECDSA) to the list of known hosts.
2020/05/22 22:29:31 fuzzer started
2020/05/22 22:29:31 dialing manager at 10.128.0.105:38353
2020/05/22 22:29:31 syscalls: 3055
2020/05/22 22:29:31 code coverage: enabled
2020/05/22 22:29:31 comparison tracing: enabled
2020/05/22 22:29:31 extra coverage: enabled
2020/05/22 22:29:31 setuid sandbox: enabled
2020/05/22 22:29:31 namespace sandbox: enabled
2020/05/22 22:29:31 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/22 22:29:31 fault injection: enabled
2020/05/22 22:29:31 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/22 22:29:31 net packet injection: enabled
2020/05/22 22:29:31 net device setup: enabled
2020/05/22 22:29:31 concurrency sanitizer: enabled
2020/05/22 22:29:31 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/22 22:29:31 USB emulation: enabled
[   57.385243][ T8918] KCSAN: could not find function: '_find_next_bit'
2020/05/22 22:29:36 adding functions to KCSAN blacklist: 'ep_poll' 'ext4_free_inodes_count' 'pcpu_alloc' 'lruvec_lru_size' '__snd_rawmidi_transmit_ack' 'tick_sched_do_timer' 'generic_fillattr' '__add_to_page_cache_locked' 'run_timer_softirq' 'kauditd_thread' 'find_get_pages_range_tag' 'find_alive_thread' 'kcm_rfree' 'mod_timer' 'do_nanosleep' 'generic_file_read_iter' 'ktime_get_real_seconds' 'xas_clear_mark' 'copy_process' 'ext4_mark_iloc_dirty' 'blk_mq_sched_dispatch_requests' 'shmem_file_read_iter' 'blk_mq_dispatch_rq_list' '__ext4_new_inode' 'dd_has_work' '_find_next_bit' 'page_counter_charge' 'echo_char' 'add_timer' 'generic_write_end' 'do_signal_stop' 
[  179.293993][    T0] ==================================================================
[  179.302359][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  179.310937][    T0] 
[  179.313259][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[  179.323826][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  179.329711][    T0]  do_idle+0x1ad/0x290
[  179.333761][    T0]  cpu_startup_entry+0x14/0x20
[  179.338503][    T0]  rest_init+0xe4/0xeb
[  179.342556][    T0]  arch_call_rest_init+0x13/0x2b
[  179.347504][    T0]  start_kernel+0x7fe/0x823
[  179.352016][    T0]  secondary_startup_64+0xa4/0xb0
[  179.357047][    T0] 
[  179.359382][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  179.366845][    T0]  tick_nohz_next_event+0x181/0x340
[  179.372027][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  179.377563][    T0]  do_idle+0x1ad/0x290
[  179.381613][    T0]  cpu_startup_entry+0x14/0x20
[  179.386821][    T0]  start_secondary+0x169/0x1b0
[  179.391593][    T0]  secondary_startup_64+0xa4/0xb0
[  179.396587][    T0] 
[  179.398989][    T0] Reported by Kernel Concurrency Sanitizer on:
[  179.405123][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  179.413079][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  179.423218][    T0] ==================================================================
[  179.431268][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  179.437845][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  179.445763][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  179.457585][    T0] Call Trace:
[  179.460920][    T0]  dump_stack+0x11d/0x187
[  179.465380][    T0]  panic+0x210/0x640
[  179.469271][    T0]  ? vprintk_func+0x89/0x13a
[  179.474024][    T0]  kcsan_report.cold+0xc/0x1a
[  179.478688][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  179.484047][    T0]  tick_nohz_next_event+0x181/0x340
[  179.489235][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  179.494948][    T0]  ? ktime_get+0x1c9/0x210
[  179.499435][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  179.505144][    T0]  do_idle+0x1ad/0x290
[  179.509764][    T0]  cpu_startup_entry+0x14/0x20
[  179.515399][    T0]  start_secondary+0x169/0x1b0
[  179.520256][    T0]  secondary_startup_64+0xa4/0xb0
[  179.526795][    T0] Kernel Offset: disabled
[  179.531122][    T0] Rebooting in 86400 seconds..