[  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 '10.128.0.59' (ECDSA) to the list of known hosts.
2020/11/15 06:48:50 fuzzer started
2020/11/15 06:48:51 dialing manager at 10.128.0.105:35027
2020/11/15 06:48:51 syscalls: 3448
2020/11/15 06:48:51 code coverage: enabled
2020/11/15 06:48:51 comparison tracing: enabled
2020/11/15 06:48:51 extra coverage: enabled
2020/11/15 06:48:51 setuid sandbox: enabled
2020/11/15 06:48:51 namespace sandbox: enabled
2020/11/15 06:48:51 Android sandbox: /sys/fs/selinux/policy does not exist
2020/11/15 06:48:51 fault injection: enabled
2020/11/15 06:48:51 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/11/15 06:48:51 net packet injection: enabled
2020/11/15 06:48:51 net device setup: enabled
2020/11/15 06:48:51 concurrency sanitizer: enabled
2020/11/15 06:48:51 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/11/15 06:48:51 USB emulation: enabled
2020/11/15 06:48:51 hci packet injection: enabled
2020/11/15 06:48:51 wifi device emulation: enabled
2020/11/15 06:48:56 suppressing KCSAN reports in functions: 'step_into' 'direct_page_fault' 'snd_rawmidi_kernel_write1' 'ext4_writepages' '__delayacct_blkio_end' 'do_readlinkat' '__find_get_block' 'exit_mm' 'ext4_ext_insert_extent' '__filemap_fdatawrite_range' 'blk_mq_sched_dispatch_requests' 'do_nanosleep' 'ext4_mb_good_group' 'wbt_issue' 'tomoyo_check_path_acl' 'xas_find_marked' '__xa_clear_mark' 'pcpu_alloc' '__blk_mq_sched_dispatch_requests' 'ext4_mb_regular_allocator' 'fuse_get_req' 'generic_write_end' 'kauditd_thread' 'n_tty_receive_buf_common' 'dd_has_work' '__xa_set_mark' 'ext4_mark_iloc_dirty' 'expire_timers' 'find_get_pages_range_tag' '__mark_inode_dirty' 'wbt_wait' 'alloc_pid' 'ext4_handle_inode_extension' '__io_cqring_fill_event' '__ext4_new_inode' 'futex_wait_queue_me' 'blk_mq_rq_ctx_init' 'do_select' 'xas_clear_mark' '__add_to_page_cache_locked' '_prb_read_valid' 'do_sys_poll' 'fifo_open' 'audit_log_start' 'ext4_free_inode' 'ext4_free_inodes_count' 'blk_mq_dispatch_rq_list' 'snd_rawmidi_poll' 'ext4_setattr' 
syzkaller login: [   94.511621][    T0] ==================================================================
[   94.519734][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer
[   94.527615][    T0] 
[   94.529946][    T0] write to 0xffffffff86fc1910 of 4 bytes by interrupt on cpu 0:
[   94.537576][    T0]  tick_sched_timer+0x1f5/0x210
[   94.542440][    T0]  __run_hrtimer+0x133/0x420
[   94.547029][    T0]  hrtimer_interrupt+0x36e/0xa10
[   94.551967][    T0]  __sysvec_apic_timer_interrupt+0x6f/0x200
[   94.557868][    T0]  sysvec_apic_timer_interrupt+0x6f/0x90
[   94.563500][    T0]  asm_sysvec_apic_timer_interrupt+0x12/0x20
[   94.569467][    T0] 
[   94.571977][    T0] read to 0xffffffff86fc1910 of 4 bytes by task 0 on cpu 1:
[   94.579263][    T0]  tick_nohz_next_event+0x217/0x300
[   94.584460][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   94.590315][    T0]  menu_select+0x2fa/0xf40
[   94.594729][    T0]  cpuidle_select+0x3d/0x50
[   94.599227][    T0]  do_idle+0x15f/0x230
[   94.603296][    T0]  cpu_startup_entry+0x15/0x20
[   94.608058][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   94.613935][    T0] 
[   94.616255][    T0] Reported by Kernel Concurrency Sanitizer on:
[   94.622396][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc3-syzkaller #0
[   94.630354][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.640533][    T0] ==================================================================
[   94.648588][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   94.655173][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc3-syzkaller #0
[   94.663138][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.673335][    T0] Call Trace:
[   94.676822][    T0]  dump_stack+0x116/0x15d
[   94.681156][    T0]  panic+0x1e7/0x5fa
[   94.685055][    T0]  ? vprintk_emit+0x2f2/0x370
[   94.689727][    T0]  kcsan_report+0x67b/0x680
[   94.694230][    T0]  ? kcsan_setup_watchpoint+0x46a/0x4d0
[   94.699989][    T0]  ? tick_nohz_next_event+0x217/0x300
[   94.705367][    T0]  ? tick_nohz_get_sleep_length+0x121/0x270
[   94.711577][    T0]  ? menu_select+0x2fa/0xf40
[   94.716165][    T0]  ? cpuidle_select+0x3d/0x50
[   94.720837][    T0]  ? do_idle+0x15f/0x230
[   94.725166][    T0]  ? cpu_startup_entry+0x15/0x20
[   94.730107][    T0]  ? secondary_startup_64_no_verify+0xb0/0xbb
[   94.736182][    T0]  ? ktime_get+0x1b0/0x1e0
[   94.740746][    T0]  kcsan_setup_watchpoint+0x46a/0x4d0
[   94.746124][    T0]  tick_nohz_next_event+0x217/0x300
[   94.751326][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   94.757050][    T0]  menu_select+0x2fa/0xf40
[   94.761664][    T0]  ? _raw_spin_unlock_irq+0x22/0x40
[   94.766868][    T0]  ? finish_task_switch+0x81/0x280
[   94.771980][    T0]  cpuidle_select+0x3d/0x50
[   94.776628][    T0]  do_idle+0x15f/0x230
[   94.780812][    T0]  cpu_startup_entry+0x15/0x20
[   94.785580][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   94.792393][    T0] Kernel Offset: disabled
[   94.796890][    T0] Rebooting in 86400 seconds..