[  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 '10.128.1.40' (ECDSA) to the list of known hosts.
2020/04/19 10:17:29 fuzzer started
2020/04/19 10:17:32 dialing manager at 10.128.0.105:41163
2020/04/19 10:17:32 syscalls: 2960
2020/04/19 10:17:32 code coverage: enabled
2020/04/19 10:17:32 comparison tracing: enabled
2020/04/19 10:17:32 extra coverage: enabled
2020/04/19 10:17:32 setuid sandbox: enabled
2020/04/19 10:17:32 namespace sandbox: enabled
2020/04/19 10:17:32 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/19 10:17:32 fault injection: enabled
2020/04/19 10:17:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/19 10:17:32 net packet injection: enabled
2020/04/19 10:17:32 net device setup: enabled
2020/04/19 10:17:32 concurrency sanitizer: enabled
2020/04/19 10:17:32 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/19 10:17:32 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   48.286973][ T6734] KCSAN: could not find function: '_find_next_bit'
2020/04/19 10:17:35 adding functions to KCSAN blacklist: 'ext4_mark_iloc_dirty' '__find_get_block' 'n_tty_receive_buf_common' 'generic_fillattr' 'kauditd_thread' 'do_nanosleep' 'generic_write_end' 'page_counter_charge' 'tick_sched_do_timer' 'kcm_rfree' 'xas_clear_mark' 'tick_nohz_next_event' 'find_get_pages_range_tag' 'ep_poll' '__ext4_new_inode' '_find_next_bit' 'run_timer_softirq' 'ext4_free_inodes_count' 'exit_signals' 'add_timer' 'do_exit' 'copy_process' 'blk_mq_sched_dispatch_requests' 'dd_has_work' 'ext4_setattr' 
[  147.138024][    T0] ==================================================================
[  147.146441][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  147.155359][    T0] 
[  147.157783][    T0] write to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  147.165151][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  147.170697][    T0]  do_idle+0x1ad/0x290
[  147.174781][    T0]  cpu_startup_entry+0x14/0x20
[  147.179559][    T0]  rest_init+0xe4/0xeb
[  147.183641][    T0]  arch_call_rest_init+0x13/0x2b
[  147.188584][    T0]  start_kernel+0x82d/0x852
[  147.193088][    T0]  secondary_startup_64+0xa4/0xb0
[  147.198104][    T0] 
[  147.200436][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[  147.207719][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  147.213258][    T0]  do_idle+0x1ad/0x290
[  147.217326][    T0]  cpu_startup_entry+0x14/0x20
[  147.222088][    T0]  start_secondary+0x169/0x1b0
[  147.226851][    T0]  secondary_startup_64+0xa4/0xb0
[  147.231853][    T0] 
[  147.234158][    T0] Reported by Kernel Concurrency Sanitizer on:
[  147.240295][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  147.248163][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  147.258241][    T0] ==================================================================
[  147.266292][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  147.272871][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  147.280745][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  147.290785][    T0] Call Trace:
[  147.294063][    T0]  dump_stack+0x11d/0x187
[  147.298377][    T0]  panic+0x210/0x640
[  147.302263][    T0]  ? vprintk_func+0x89/0x13a
[  147.306852][    T0]  kcsan_report.cold+0xc/0x1a
[  147.311510][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  147.316862][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  147.322440][    T0]  do_idle+0x1ad/0x290
[  147.326489][    T0]  cpu_startup_entry+0x14/0x20
[  147.331230][    T0]  start_secondary+0x169/0x1b0
[  147.335972][    T0]  secondary_startup_64+0xa4/0xb0
[  147.342157][    T0] Kernel Offset: disabled
[  147.346479][    T0] Rebooting in 86400 seconds..