[  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 '10.128.0.45' (ECDSA) to the list of known hosts.
2020/06/03 13:38:40 fuzzer started
2020/06/03 13:38:40 dialing manager at 10.128.0.105:40391
2020/06/03 13:38:40 syscalls: 3055
2020/06/03 13:38:40 code coverage: enabled
2020/06/03 13:38:40 comparison tracing: enabled
2020/06/03 13:38:40 extra coverage: enabled
2020/06/03 13:38:40 setuid sandbox: enabled
2020/06/03 13:38:40 namespace sandbox: enabled
2020/06/03 13:38:40 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/03 13:38:40 fault injection: enabled
2020/06/03 13:38:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/03 13:38:40 net packet injection: enabled
2020/06/03 13:38:40 net device setup: enabled
2020/06/03 13:38:40 concurrency sanitizer: enabled
2020/06/03 13:38:40 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/03 13:38:40 USB emulation: enabled
2020/06/03 13:38:42 adding functions to KCSAN blacklist: 'generic_file_read_iter' '__ext4_new_inode' 'n_tty_receive_buf_common' 'mod_timer' 'xas_clear_mark' 'find_get_pages_range_tag' 'blk_mq_get_request' 'futex_wait_queue_me' 'ext4_free_inodes_count' 'ep_poll' 'alloc_pid' 'do_settimeofday64' 'page_counter_charge' 'do_nanosleep' 'generic_write_end' 'wbt_issue' 'copy_process' 'kauditd_thread' 
syzkaller login: [  110.823837][    T0] ==================================================================
[  110.832086][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer
[  110.840584][    T0] 
[  110.842938][    T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[  110.850677][    T0]  tick_sched_do_timer+0xb4/0xd0
[  110.855619][    T0]  tick_sched_timer+0x3f/0xd0
[  110.860638][    T0]  __hrtimer_run_queues+0x271/0x600
[  110.865922][    T0]  hrtimer_interrupt+0x226/0x490
[  110.870860][    T0]  smp_apic_timer_interrupt+0xd8/0x270
[  110.876329][    T0]  apic_timer_interrupt+0xf/0x20
[  110.881422][    T0] 
[  110.883933][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  110.891306][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  110.897110][    T0]  do_idle+0x1ad/0x290
[  110.901210][    T0]  cpu_startup_entry+0x14/0x20
[  110.906112][    T0]  start_secondary+0x169/0x1b0
[  110.910876][    T0]  secondary_startup_64+0xa4/0xb0
[  110.918314][    T0] 
[  110.920641][    T0] Reported by Kernel Concurrency Sanitizer on:
[  110.926888][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  110.934888][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  110.945069][    T0] ==================================================================
[  110.953128][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  110.959744][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  110.971738][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  110.983944][    T0] Call Trace:
[  110.987624][    T0]  dump_stack+0x11d/0x187
[  110.992629][    T0]  panic+0x210/0x640
[  110.996671][    T0]  ? vprintk_func+0x89/0x13a
[  111.001355][    T0]  kcsan_report.cold+0xc/0x1a
[  111.006046][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  111.011440][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  111.016985][    T0]  do_idle+0x1ad/0x290
[  111.021254][    T0]  cpu_startup_entry+0x14/0x20
[  111.026024][    T0]  start_secondary+0x169/0x1b0
[  111.030888][    T0]  secondary_startup_64+0xa4/0xb0
[  111.037759][    T0] Kernel Offset: disabled
[  111.042079][    T0] Rebooting in 86400 seconds..