[  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 '10.128.0.192' (ECDSA) to the list of known hosts.
2020/04/23 15:58:05 fuzzer started
2020/04/23 15:58:07 dialing manager at 10.128.0.105:45225
2020/04/23 15:58:08 syscalls: 2960
2020/04/23 15:58:08 code coverage: enabled
2020/04/23 15:58:08 comparison tracing: enabled
2020/04/23 15:58:08 extra coverage: enabled
2020/04/23 15:58:08 setuid sandbox: enabled
2020/04/23 15:58:08 namespace sandbox: enabled
2020/04/23 15:58:08 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/23 15:58:08 fault injection: enabled
2020/04/23 15:58:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/23 15:58:08 net packet injection: enabled
2020/04/23 15:58:08 net device setup: enabled
2020/04/23 15:58:08 concurrency sanitizer: enabled
2020/04/23 15:58:08 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/23 15:58:08 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   48.183876][ T6734] KCSAN: could not find function: '_find_next_bit'
2020/04/23 15:58:10 adding functions to KCSAN blacklist: 'mod_timer' 'audit_log_start' 'kvm_mmu_notifier_invalidate_range_end' 'echo_char' 'do_signal_stop' 'ext4_free_inodes_count' 'copy_process' '__ext4_new_inode' '_find_next_bit' 'find_get_pages_range_tag' 'xas_clear_mark' 'page_counter_charge' 'pcpu_alloc' 'io_sq_thread' 'do_exit' 'ext4_writepages' 'generic_write_end' 'run_timer_softirq' 'generic_fillattr' '__mark_inode_dirty' 'ep_poll' 'tick_sched_do_timer' 'blk_mq_dispatch_rq_list' 
[  134.146635][    T0] ==================================================================
[  134.154770][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  134.163669][    T0] 
[  134.165978][    T0] write to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[  134.173376][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  134.178940][    T0]  do_idle+0x1ad/0x290
[  134.182985][    T0]  cpu_startup_entry+0x14/0x20
[  134.187724][    T0]  start_secondary+0x169/0x1b0
[  134.192463][    T0]  secondary_startup_64+0xa4/0xb0
[  134.197453][    T0] 
[  134.199758][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  134.207024][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  134.212545][    T0]  do_idle+0x1ad/0x290
[  134.216591][    T0]  cpu_startup_entry+0x14/0x20
[  134.221330][    T0]  rest_init+0xe4/0xeb
[  134.225375][    T0]  arch_call_rest_init+0x13/0x2b
[  134.230290][    T0]  start_kernel+0x82d/0x852
[  134.234816][    T0]  secondary_startup_64+0xa4/0xb0
[  134.239821][    T0] 
[  134.242121][    T0] Reported by Kernel Concurrency Sanitizer on:
[  134.248250][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  134.256196][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  134.266223][    T0] ==================================================================
[  134.274256][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  134.280818][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0
[  134.288678][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  134.298705][    T0] Call Trace:
[  134.301985][    T0]  dump_stack+0x11d/0x187
[  134.306301][    T0]  panic+0x210/0x640
[  134.310232][    T0]  ? vprintk_func+0x89/0x13a
[  134.314807][    T0]  kcsan_report.cold+0xc/0x1a
[  134.319464][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  134.324814][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  134.330336][    T0]  do_idle+0x1ad/0x290
[  134.334429][    T0]  ? do_idle+0xe0/0x290
[  134.338612][    T0]  cpu_startup_entry+0x14/0x20
[  134.343354][    T0]  rest_init+0xe4/0xeb
[  134.347448][    T0]  arch_call_rest_init+0x13/0x2b
[  134.352371][    T0]  start_kernel+0x82d/0x852
[  134.356853][    T0]  secondary_startup_64+0xa4/0xb0
[  134.363160][    T0] Kernel Offset: disabled
[  134.367475][    T0] Rebooting in 86400 seconds..