[  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

syzkaller login: [   23.742707][ T8413] bash (8413) used greatest stack depth: 10368 bytes left
Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts.
2020/12/11 12:25:16 fuzzer started
2020/12/11 12:25:16 dialing manager at 10.128.0.105:41413
2020/12/11 12:25:20 syscalls: 3465
2020/12/11 12:25:20 code coverage: enabled
2020/12/11 12:25:20 comparison tracing: enabled
2020/12/11 12:25:20 extra coverage: enabled
2020/12/11 12:25:20 setuid sandbox: enabled
2020/12/11 12:25:20 namespace sandbox: enabled
2020/12/11 12:25:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/12/11 12:25:20 fault injection: enabled
2020/12/11 12:25:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/12/11 12:25:20 net packet injection: enabled
2020/12/11 12:25:20 net device setup: enabled
2020/12/11 12:25:20 concurrency sanitizer: enabled
2020/12/11 12:25:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/12/11 12:25:20 USB emulation: enabled
2020/12/11 12:25:20 hci packet injection: enabled
2020/12/11 12:25:20 wifi device emulation: enabled
2020/12/11 12:25:22 suppressing KCSAN reports in functions: 'do_nanosleep' 'dd_has_work' 'shmem_add_to_page_cache' 'expire_timers' '__filemap_fdatawrite_range' 'ext4_mark_iloc_dirty' 'blk_mq_sched_dispatch_requests' 'ext4_mb_good_group' 'ext4_free_inodes_count' 'xas_find_marked' 'audit_log_start' '__ext4_new_inode' '__xa_clear_mark' 'filemap_map_pages' 'generic_write_end' 'do_signal_stop' '__blk_mq_sched_dispatch_requests' 'blk_mq_rq_ctx_init' 'n_tty_receive_char_inline' 'find_get_pages_range_tag' 'do_select' '__writeback_single_inode' 'ext4_writepages' 'exit_mm' 'futex_wait_queue_me' '__ext4_update_other_inode_time' 'blk_mq_dispatch_rq_list' 'ext4_free_inode' '__kernfs_remove' 'alloc_pid' 'n_tty_receive_buf_common' '__io_cqring_fill_event' 'kauditd_thread' 'ext4_mb_find_by_goal' 
[   55.355649][    T0] ==================================================================
[   55.363780][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer
[   55.371659][    T0] 
[   55.373984][    T0] write to 0xffffffff86fc1a50 of 4 bytes by interrupt on cpu 0:
[   55.381605][    T0]  tick_sched_timer+0x1f5/0x210
[   55.386479][    T0]  __run_hrtimer+0x133/0x420
[   55.391066][    T0]  hrtimer_interrupt+0x36e/0xa10
[   55.396005][    T0]  __sysvec_apic_timer_interrupt+0x6f/0x200
[   55.401895][    T0]  sysvec_apic_timer_interrupt+0x6f/0x90
[   55.407518][    T0]  asm_sysvec_apic_timer_interrupt+0x12/0x20
[   55.413478][    T0] 
[   55.415829][    T0] read to 0xffffffff86fc1a50 of 4 bytes by task 0 on cpu 1:
[   55.423103][    T0]  tick_nohz_next_event+0x217/0x300
[   55.428330][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   55.434069][    T0]  menu_select+0x2fa/0xf40
[   55.438486][    T0]  cpuidle_select+0x3d/0x50
[   55.442980][    T0]  do_idle+0x15f/0x230
[   55.447051][    T0]  cpu_startup_entry+0x15/0x20
[   55.451808][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   55.457715][    T0] 
[   55.460033][    T0] Reported by Kernel Concurrency Sanitizer on:
[   55.466186][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc7-syzkaller #0
[   55.474177][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.484242][    T0] ==================================================================
[   55.492383][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   55.498967][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc7-syzkaller #0
[   55.506928][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.516976][    T0] Call Trace:
[   55.520263][    T0]  dump_stack+0x116/0x15d
[   55.524606][    T0]  panic+0x1e7/0x5fa
[   55.528494][    T0]  ? vprintk_emit+0x2f2/0x370
[   55.533164][    T0]  kcsan_report+0x67b/0x680
[   55.537764][    T0]  ? kcsan_setup_watchpoint+0x46a/0x4d0
[   55.543303][    T0]  ? tick_nohz_next_event+0x217/0x300
[   55.548667][    T0]  ? tick_nohz_get_sleep_length+0x121/0x270
[   55.554549][    T0]  ? menu_select+0x2fa/0xf40
[   55.559148][    T0]  ? cpuidle_select+0x3d/0x50
[   55.563812][    T0]  ? do_idle+0x15f/0x230
[   55.568052][    T0]  ? cpu_startup_entry+0x15/0x20
[   55.573504][    T0]  ? secondary_startup_64_no_verify+0xb0/0xbb
[   55.579572][    T0]  ? ktime_get+0x1b0/0x1e0
[   55.583986][    T0]  kcsan_setup_watchpoint+0x46a/0x4d0
[   55.589787][    T0]  tick_nohz_next_event+0x217/0x300
[   55.594984][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   55.600700][    T0]  menu_select+0x2fa/0xf40
[   55.605110][    T0]  ? _raw_spin_unlock_irq+0x22/0x40
[   55.610303][    T0]  ? finish_task_switch+0x81/0x280
[   55.621489][    T0]  cpuidle_select+0x3d/0x50
[   55.626000][    T0]  do_idle+0x15f/0x230
[   55.630072][    T0]  cpu_startup_entry+0x15/0x20
[   55.634812][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   55.641144][    T0] Kernel Offset: disabled
[   55.645516][    T0] Rebooting in 86400 seconds..