[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts.
2020/05/12 09:32:02 fuzzer started
2020/05/12 09:32:02 dialing manager at 10.128.0.105:36533
2020/05/12 09:32:14 syscalls: 3055
2020/05/12 09:32:14 code coverage: enabled
2020/05/12 09:32:14 comparison tracing: enabled
2020/05/12 09:32:14 extra coverage: enabled
2020/05/12 09:32:14 setuid sandbox: enabled
2020/05/12 09:32:14 namespace sandbox: enabled
2020/05/12 09:32:14 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/12 09:32:14 fault injection: enabled
2020/05/12 09:32:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/12 09:32:14 net packet injection: enabled
2020/05/12 09:32:14 net device setup: enabled
2020/05/12 09:32:14 concurrency sanitizer: enabled
2020/05/12 09:32:14 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/12 09:32:14 USB emulation: enabled
syzkaller login: [   67.046604][ T8925] KCSAN: could not find function: '_find_next_bit'
[   68.106681][ T8925] KCSAN: could not find function: 'poll_schedule_timeout'
2020/05/12 09:32:18 adding functions to KCSAN blacklist: 'shmem_file_read_iter' 'page_counter_charge' 'ext4_mark_iloc_dirty' 'tick_sched_do_timer' 'ep_poll' 'generic_fillattr' 'wbt_done' 'find_get_pages_range_tag' '__mark_inode_dirty' '__put_unused_fd' 'add_timer' '_find_next_bit' 'xas_clear_mark' 'echo_char' 'alloc_pid' '__delete_from_page_cache' 'poll_schedule_timeout' 'run_timer_softirq' 'xas_find_marked' 'other_inode_match' 'ext4_free_inodes_count' 'do_signal_stop' 'wg_packet_send_staged_packets' 'generic_write_end' 'blk_mq_dispatch_rq_list' 'blk_mq_sched_dispatch_requests' '__ext4_new_inode' 'do_nanosleep' 'wbt_wait' 'tick_nohz_idle_stop_tick' 'blk_mq_get_request' 'n_tty_receive_buf_common' 'mod_timer' 
[  226.046792][ T1925] ==================================================================
[  226.054984][ T1925] BUG: KCSAN: data-race in schedule_hrtimeout_range_clock / watchdog
[  226.063063][ T1925] 
[  226.065414][ T1925] write to 0xffff88812693c050 of 8 bytes by task 8910 on cpu 1:
[  226.073037][ T1925]  schedule_hrtimeout_range_clock+0x14f/0x1f0
[  226.079094][ T1925]  schedule_hrtimeout_range+0x30/0x50
[  226.084471][ T1925]  poll_schedule_timeout.constprop.0+0x71/0xc0
[  226.090634][ T1925]  do_select+0xd7e/0x1020
[  226.094955][ T1925]  core_sys_select+0x2c7/0x5f0
[  226.099708][ T1925]  do_pselect.constprop.0+0x125/0x160
[  226.105086][ T1925]  __x64_sys_pselect6+0x12a/0x160
[  226.110111][ T1925]  do_syscall_64+0xc7/0x3b0
[  226.114615][ T1925]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  226.120499][ T1925] 
[  226.122832][ T1925] read to 0xffff88812693c050 of 8 bytes by task 1925 on cpu 0:
[  226.130391][ T1925]  watchdog+0x2b8/0x960
[  226.134581][ T1925]  kthread+0x203/0x230
[  226.138643][ T1925]  ret_from_fork+0x1f/0x30
[  226.143039][ T1925] 
[  226.145366][ T1925] Reported by Kernel Concurrency Sanitizer on:
[  226.151535][ T1925] CPU: 0 PID: 1925 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0
[  226.159770][ T1925] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  226.169812][ T1925] ==================================================================
[  226.177877][ T1925] Kernel panic - not syncing: panic_on_warn set ...
[  226.184460][ T1925] CPU: 0 PID: 1925 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0
[  226.192680][ T1925] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  226.202742][ T1925] Call Trace:
[  226.206073][ T1925]  dump_stack+0x11d/0x187
[  226.210422][ T1925]  panic+0x210/0x640
[  226.214313][ T1925]  ? vprintk_func+0x89/0x13a
[  226.218903][ T1925]  kcsan_report.cold+0xc/0x1a
[  226.223586][ T1925]  kcsan_setup_watchpoint+0x3fb/0x440
[  226.229002][ T1925]  watchdog+0x2b8/0x960
[  226.233169][ T1925]  ? __read_once_size.constprop.0+0x20/0x20
[  226.239073][ T1925]  kthread+0x203/0x230
[  226.243138][ T1925]  ? kthread_unpark+0xd0/0xd0
[  226.247973][ T1925]  ret_from_fork+0x1f/0x30
[  226.253762][ T1925] Kernel Offset: disabled
[  226.258113][ T1925] Rebooting in 86400 seconds..