[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts.
2020/06/07 09:34:47 fuzzer started
2020/06/07 09:34:47 dialing manager at 10.128.0.105:43689
2020/06/07 09:34:51 syscalls: 3055
2020/06/07 09:34:51 code coverage: enabled
2020/06/07 09:34:51 comparison tracing: enabled
2020/06/07 09:34:51 extra coverage: enabled
2020/06/07 09:34:51 setuid sandbox: enabled
2020/06/07 09:34:51 namespace sandbox: enabled
2020/06/07 09:34:51 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/07 09:34:51 fault injection: enabled
2020/06/07 09:34:51 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/07 09:34:51 net packet injection: enabled
2020/06/07 09:34:51 net device setup: enabled
2020/06/07 09:34:51 concurrency sanitizer: enabled
2020/06/07 09:34:51 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/07 09:34:51 USB emulation: enabled
syzkaller login: [   58.062402][ T8921] KCSAN: could not find function: '_find_next_bit'
2020/06/07 09:34:54 adding functions to KCSAN blacklist: 'xas_clear_mark' 'generic_write_end' 'tick_nohz_next_event' 'futex_wait_queue_me' 'find_get_pages_range_tag' '__snd_rawmidi_transmit_ack' 'add_timer' 'blk_mq_dispatch_rq_list' 'tick_sched_do_timer' 'do_nanosleep' '__ext4_new_inode' 'ext4_free_inodes_count' 'echo_char' '_find_next_bit' 'copy_process' 'ep_poll' 'run_timer_softirq' 'wbt_done' 
[   72.727733][    T0] ==================================================================
[   72.736081][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[   72.744981][    T0] 
[   72.747294][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[   72.754651][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   72.760173][    T0]  do_idle+0x1ad/0x290
[   72.764217][    T0]  cpu_startup_entry+0x14/0x20
[   72.769047][    T0]  rest_init+0xe4/0xeb
[   72.773093][    T0]  arch_call_rest_init+0x13/0x2b
[   72.778008][    T0]  start_kernel+0x7fe/0x823
[   72.782495][    T0]  secondary_startup_64+0xa4/0xb0
[   72.787490][    T0] 
[   72.789801][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[   72.797065][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   72.802933][    T0]  do_idle+0x1ad/0x290
[   72.806979][    T0]  cpu_startup_entry+0x14/0x20
[   72.811831][    T0]  start_secondary+0x169/0x1b0
[   72.816597][    T0]  secondary_startup_64+0xa4/0xb0
[   72.821594][    T0] 
[   72.823915][    T0] Reported by Kernel Concurrency Sanitizer on:
[   72.830056][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   72.837947][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   72.848003][    T0] ==================================================================
[   72.856049][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   72.862738][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[   72.870703][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   72.880754][    T0] Call Trace:
[   72.884031][    T0]  dump_stack+0x11d/0x187
[   72.888430][    T0]  panic+0x210/0x640
[   72.892307][    T0]  ? vprintk_func+0x89/0x13a
[   72.897237][    T0]  kcsan_report.cold+0xc/0x1a
[   72.901896][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   72.907252][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[   72.914647][    T0]  do_idle+0x1ad/0x290
[   72.919581][    T0]  cpu_startup_entry+0x14/0x20
[   72.924417][    T0]  start_secondary+0x169/0x1b0
[   72.929165][    T0]  secondary_startup_64+0xa4/0xb0
[   72.935538][    T0] Kernel Offset: disabled
[   72.939870][    T0] Rebooting in 86400 seconds..