[  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 '10.128.1.39' (ECDSA) to the list of known hosts.
2020/05/01 21:52:08 fuzzer started
2020/05/01 21:52:09 dialing manager at 10.128.0.105:40203
2020/05/01 21:52:14 syscalls: 2964
2020/05/01 21:52:14 code coverage: enabled
2020/05/01 21:52:14 comparison tracing: enabled
2020/05/01 21:52:14 extra coverage: enabled
2020/05/01 21:52:14 setuid sandbox: enabled
2020/05/01 21:52:14 namespace sandbox: enabled
2020/05/01 21:52:14 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/01 21:52:14 fault injection: enabled
2020/05/01 21:52:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/01 21:52:14 net packet injection: enabled
2020/05/01 21:52:14 net device setup: enabled
2020/05/01 21:52:14 concurrency sanitizer: enabled
2020/05/01 21:52:14 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/01 21:52:14 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   50.670316][ T6708] KCSAN: could not find function: '_find_next_bit'
2020/05/01 21:52:15 adding functions to KCSAN blacklist: 'atime_needs_update' 'ep_poll' 'generic_write_end' 'do_exit' 'ktime_get_real_seconds' 'alloc_pid' 'ext4_writepages' 'do_syslog' 'page_counter_charge' '__ext4_new_inode' '_find_next_bit' 'xas_clear_mark' 'add_timer' 'run_timer_softirq' 'mod_timer' 'io_sq_thread' 'ext4_free_inodes_count' 'tick_sched_do_timer' 'pcpu_alloc' 'generic_fillattr' 
[  103.482615][    T0] ==================================================================
[  103.490755][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[  103.499313][    T0] 
[  103.501623][    T0] write to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 0:
[  103.509334][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  103.514995][    T0]  do_idle+0x1ad/0x290
[  103.519042][    T0]  cpu_startup_entry+0x14/0x20
[  103.523789][    T0]  rest_init+0xe4/0xeb
[  103.527873][    T0]  arch_call_rest_init+0x13/0x2b
[  103.532904][    T0]  start_kernel+0x82d/0x852
[  103.537619][    T0]  secondary_startup_64+0xa4/0xb0
[  103.542724][    T0] 
[  103.545036][    T0] read to 0xffffffff85f0ef50 of 4 bytes by task 0 on cpu 1:
[  103.552312][    T0]  tick_nohz_next_event+0x181/0x340
[  103.557509][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  103.563032][    T0]  do_idle+0x1ad/0x290
[  103.567079][    T0]  cpu_startup_entry+0x14/0x20
[  103.571821][    T0]  start_secondary+0x169/0x1b0
[  103.577016][    T0]  secondary_startup_64+0xa4/0xb0
[  103.582012][    T0] 
[  103.584759][    T0] Reported by Kernel Concurrency Sanitizer on:
[  103.590928][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  103.599491][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  103.609738][    T0] ==================================================================
[  103.617861][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  103.624428][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  103.632551][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  103.642582][    T0] Call Trace:
[  103.646146][    T0]  dump_stack+0x11d/0x187
[  103.655052][    T0]  panic+0x210/0x640
[  103.659030][    T0]  ? vprintk_func+0x89/0x13a
[  103.663629][    T0]  kcsan_report.cold+0xc/0x1a
[  103.668573][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  103.674116][    T0]  tick_nohz_next_event+0x181/0x340
[  103.679318][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[  103.684848][    T0]  ? ktime_get+0x1c9/0x210
[  103.690058][    T0]  ? debug_smp_processor_id+0x3f/0x129
[  103.696121][    T0]  do_idle+0x1ad/0x290
[  103.700276][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  103.707027][    T0]  cpu_startup_entry+0x14/0x20
[  103.712159][    T0]  start_secondary+0x169/0x1b0
[  103.717461][    T0]  secondary_startup_64+0xa4/0xb0
[  103.724429][    T0] Kernel Offset: disabled
[  103.728805][    T0] Rebooting in 86400 seconds..