[  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 '10.128.0.93' (ECDSA) to the list of known hosts.
2020/06/10 14:46:25 fuzzer started
2020/06/10 14:46:25 dialing manager at 10.128.0.105:34607
2020/06/10 14:46:25 syscalls: 3076
2020/06/10 14:46:25 code coverage: enabled
2020/06/10 14:46:25 comparison tracing: enabled
2020/06/10 14:46:25 extra coverage: enabled
2020/06/10 14:46:25 setuid sandbox: enabled
2020/06/10 14:46:25 namespace sandbox: enabled
2020/06/10 14:46:25 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/10 14:46:25 fault injection: enabled
2020/06/10 14:46:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/10 14:46:25 net packet injection: enabled
2020/06/10 14:46:25 net device setup: enabled
2020/06/10 14:46:25 concurrency sanitizer: enabled
2020/06/10 14:46:25 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/10 14:46:25 USB emulation: enabled
syzkaller login: [   49.863084][ T8887] KCSAN: could not find function: '_find_next_bit'
2020/06/10 14:46:29 adding functions to KCSAN blacklist: '__ext4_new_inode' 'ktime_get_real_seconds' 'ext4_da_write_end' 'futex_wait_queue_me' 'ep_poll' '_find_next_bit' 'pcpu_alloc' 'find_get_pages_range_tag' 'generic_write_end' 'dd_has_work' 'tick_nohz_next_event' 'ext4_handle_inode_extension' 'ext4_free_inodes_count' 'ext4_mark_iloc_dirty' 'copy_process' 'blk_mq_dispatch_rq_list' 'blk_mq_sched_dispatch_requests' 'page_counter_charge' 'blk_mq_get_request' 'do_nanosleep' 'tick_sched_do_timer' 'run_timer_softirq' 'echo_char' 'commit_echoes' 'generic_fillattr' 'xas_clear_mark' 'mod_timer' 
[  159.506532][    T0] ==================================================================
[  159.514662][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick
[  159.523581][    T0] 
[  159.525952][    T0] write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0:
[  159.533576][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[  159.539111][    T0]  do_idle+0x1ad/0x290
[  159.543166][    T0]  cpu_startup_entry+0x14/0x20
[  159.547917][    T0]  rest_init+0xe4/0xeb
[  159.551971][    T0]  arch_call_rest_init+0x13/0x2b
[  159.556937][    T0]  start_kernel+0x7fe/0x823
[  159.561427][    T0]  secondary_startup_64+0xa4/0xb0
[  159.566418][    T0] 
[  159.568725][    T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
[  159.575985][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  159.581509][    T0]  do_idle+0x1ad/0x290
[  159.585566][    T0]  cpu_startup_entry+0x14/0x20
[  159.590303][    T0]  start_secondary+0x169/0x1b0
[  159.595041][    T0]  secondary_startup_64+0xa4/0xb0
[  159.600030][    T0] 
[  159.602342][    T0] Reported by Kernel Concurrency Sanitizer on:
[  159.608485][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  159.616456][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  159.626491][    T0] ==================================================================
[  159.634543][    T0] Kernel panic - not syncing: panic_on_warn set ...
[  159.641140][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[  159.649016][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  159.659047][    T0] Call Trace:
[  159.662331][    T0]  dump_stack+0x11d/0x187
[  159.666668][    T0]  panic+0x210/0x640
[  159.671714][    T0]  ? vprintk_func+0x89/0x13a
[  159.676313][    T0]  kcsan_report.cold+0xc/0x1a
[  159.681011][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[  159.686383][    T0]  tick_nohz_idle_stop_tick+0x191/0x680
[  159.691916][    T0]  do_idle+0x1ad/0x290
[  159.695970][    T0]  ? debug_smp_processor_id+0x3a/0x129
[  159.701421][    T0]  cpu_startup_entry+0x14/0x20
[  159.706184][    T0]  start_secondary+0x169/0x1b0
[  159.710929][    T0]  secondary_startup_64+0xa4/0xb0
[  159.717310][    T0] Kernel Offset: disabled
[  159.721627][    T0] Rebooting in 86400 seconds..