[  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 '10.128.1.30' (ECDSA) to the list of known hosts.
2020/12/08 09:09:46 fuzzer started
2020/12/08 09:09:46 dialing manager at 10.128.0.105:41375
2020/12/08 09:09:54 syscalls: 3456
2020/12/08 09:09:54 code coverage: enabled
2020/12/08 09:09:54 comparison tracing: enabled
2020/12/08 09:09:54 extra coverage: enabled
2020/12/08 09:09:54 setuid sandbox: enabled
2020/12/08 09:09:54 namespace sandbox: enabled
2020/12/08 09:09:54 Android sandbox: /sys/fs/selinux/policy does not exist
2020/12/08 09:09:54 fault injection: enabled
2020/12/08 09:09:54 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/12/08 09:09:54 net packet injection: enabled
2020/12/08 09:09:54 net device setup: enabled
2020/12/08 09:09:54 concurrency sanitizer: enabled
2020/12/08 09:09:54 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/12/08 09:09:54 USB emulation: enabled
2020/12/08 09:09:54 hci packet injection: enabled
2020/12/08 09:09:54 wifi device emulation: enabled
2020/12/08 09:09:56 suppressing KCSAN reports in functions: 'ext4_writepages' 'ext4_mark_iloc_dirty' '__ext4_new_inode' '__mark_inode_dirty' 'generic_write_end' 'blk_mq_sched_dispatch_requests' 'ext4_mb_good_group' '__filemap_fdatawrite_range' 'ext4_free_inodes_count' 'alloc_pid' 'dd_has_work' 'do_nanosleep' 'filemap_map_pages' 'expire_timers' '__xa_clear_mark' '__mod_timer' 'blk_mq_rq_ctx_init' '__delete_from_page_cache' 'do_select' 'do_sys_poll' 'ext4_free_inode' 'blk_mq_dispatch_rq_list' 'xas_find_marked' 'find_get_pages_range_tag' 
syzkaller login: [   72.686988][    T0] ==================================================================
[   72.695095][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer
[   72.702952][    T0] 
[   72.705256][    T0] write to 0xffffffff86fc1ad0 of 4 bytes by interrupt on cpu 0:
[   72.712856][    T0]  tick_sched_timer+0x1f5/0x210
[   72.717679][    T0]  __run_hrtimer+0x133/0x420
[   72.722242][    T0]  hrtimer_interrupt+0x36e/0xa10
[   72.727162][    T0]  __sysvec_apic_timer_interrupt+0x6f/0x200
[   72.733027][    T0]  sysvec_apic_timer_interrupt+0x6f/0x90
[   72.738649][    T0]  asm_sysvec_apic_timer_interrupt+0x12/0x20
[   72.744601][    T0] 
[   72.746951][    T0] read to 0xffffffff86fc1ad0 of 4 bytes by task 0 on cpu 1:
[   72.754208][    T0]  tick_nohz_next_event+0x217/0x300
[   72.759381][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   72.765091][    T0]  menu_select+0x2fa/0xf40
[   72.769479][    T0]  cpuidle_select+0x3d/0x50
[   72.773954][    T0]  do_idle+0x15f/0x230
[   72.777994][    T0]  cpu_startup_entry+0x15/0x20
[   72.782746][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   72.788647][    T0] 
[   72.790947][    T0] Reported by Kernel Concurrency Sanitizer on:
[   72.797078][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc7-syzkaller #0
[   72.805024][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   72.815048][    T0] ==================================================================
[   72.823079][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   72.829636][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc7-syzkaller #0
[   72.837679][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   72.847723][    T0] Call Trace:
[   72.850988][    T0]  dump_stack+0x116/0x15d
[   72.855303][    T0]  panic+0x1e7/0x5fa
[   72.859176][    T0]  ? vprintk_emit+0x2f2/0x370
[   72.863844][    T0]  kcsan_report+0x67b/0x680
[   72.868327][    T0]  ? kcsan_setup_watchpoint+0x46a/0x4d0
[   72.873854][    T0]  ? tick_nohz_next_event+0x217/0x300
[   72.879211][    T0]  ? tick_nohz_get_sleep_length+0x121/0x270
[   72.885074][    T0]  ? menu_select+0x2fa/0xf40
[   72.889634][    T0]  ? cpuidle_select+0x3d/0x50
[   72.894283][    T0]  ? do_idle+0x15f/0x230
[   72.898525][    T0]  ? cpu_startup_entry+0x15/0x20
[   72.903441][    T0]  ? secondary_startup_64_no_verify+0xb0/0xbb
[   72.909498][    T0]  ? ktime_get+0x1b0/0x1e0
[   72.913887][    T0]  kcsan_setup_watchpoint+0x46a/0x4d0
[   72.919248][    T0]  tick_nohz_next_event+0x217/0x300
[   72.924418][    T0]  tick_nohz_get_sleep_length+0x121/0x270
[   72.930124][    T0]  menu_select+0x2fa/0xf40
[   72.934515][    T0]  ? _raw_spin_unlock_irq+0x22/0x40
[   72.939688][    T0]  ? finish_task_switch+0x81/0x280
[   72.944869][    T0]  cpuidle_select+0x3d/0x50
[   72.949343][    T0]  do_idle+0x15f/0x230
[   72.953384][    T0]  cpu_startup_entry+0x15/0x20
[   72.958121][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   72.964668][    T0] Kernel Offset: disabled
[   72.968979][    T0] Rebooting in 86400 seconds..