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

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.44' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 1001.310433] INFO: task syz-executor389:7975 blocked for more than 140 seconds.
[ 1001.317866]       Not tainted 4.14.298-syzkaller #0
[ 1001.323878] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1001.331895] syz-executor389 D28440  7975   7973 0x00000004
[ 1001.337502] Call Trace:
[ 1001.340071]  __schedule+0x88b/0x1de0
[ 1001.343806]  ? lock_acquire+0x170/0x3f0
[ 1001.347774]  ? io_schedule_timeout+0x140/0x140
[ 1001.352390]  ? _raw_spin_unlock+0x29/0x40
[ 1001.356523]  ? fuse_writepage_locked+0xe80/0xe80
[ 1001.361304]  schedule+0x8d/0x1b0
[ 1001.364659]  fuse_wait_on_page_writeback.isra.0+0xdc/0x120
[ 1001.370364]  ? fuse_do_ioctl+0x1570/0x1570
[ 1001.374585]  ? end_page_writeback+0xe3/0x1c0
[ 1001.378971]  ? wait_woken+0x230/0x230
[ 1001.382811]  fuse_launder_page+0xa2/0xd0
[ 1001.386859]  invalidate_inode_pages2_range+0x547/0xc00
[ 1001.392178]  ? clear_shadow_entry+0x160/0x160
[ 1001.396658]  ? fuse_range_is_writeback+0x1f0/0x1f0
[ 1001.401604]  ? fuse_file_alloc+0x1ca/0x260
[ 1001.405835]  ? _raw_spin_unlock+0x29/0x40
[ 1001.409979]  ? fuse_do_open+0x18e/0x460
[ 1001.414131]  fuse_finish_open+0x262/0x500
[ 1001.418272]  fuse_open_common+0x234/0x290
[ 1001.422444]  do_dentry_open+0x44b/0xec0
[ 1001.426408]  ? fuse_open_common+0x290/0x290
[ 1001.430771]  ? __inode_permission+0xcd/0x2f0
[ 1001.435164]  vfs_open+0x105/0x220
[ 1001.438595]  path_openat+0x628/0x2970
[ 1001.442422]  ? path_lookupat+0x780/0x780
[ 1001.446473]  ? trace_hardirqs_on+0x10/0x10
[ 1001.450754]  do_filp_open+0x179/0x3c0
[ 1001.454541]  ? may_open_dev+0xe0/0xe0
[ 1001.458318]  ? lock_downgrade+0x740/0x740
[ 1001.462487]  ? do_raw_spin_unlock+0x164/0x220
[ 1001.467008]  ? _raw_spin_unlock+0x29/0x40
[ 1001.471283]  ? __alloc_fd+0x1be/0x490
[ 1001.475074]  do_sys_open+0x296/0x410
[ 1001.478764]  ? filp_open+0x60/0x60
[ 1001.482321]  ? do_syscall_64+0x4c/0x640
[ 1001.486282]  ? compat_SyS_openat+0x30/0x30
[ 1001.490553]  do_syscall_64+0x1d5/0x640
[ 1001.494428]  entry_SYSCALL_64_after_hwframe+0x5e/0xd3
[ 1001.499611] 
[ 1001.499611] Showing all locks held in the system:
[ 1001.505960] 1 lock held by khungtaskd/1532:
[ 1001.510426]  #0:  (tasklist_lock){.+.+}, at: [<ffffffff8702a559>] debug_show_all_locks+0x7c/0x21a
[ 1001.519456] 1 lock held by in:imklog/7659:
[ 1001.523702]  #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818d8b5b>] __fdget_pos+0x1fb/0x2b0
[ 1001.532174] 2 locks held by syz-executor389/7975:
[ 1001.536995]  #0:  (sb_writers#10){.+.+}, at: [<ffffffff818e1bca>] mnt_want_write+0x3a/0xb0
[ 1001.545424]  #1:  (&sb->s_type->i_mutex_key#17){+.+.}, at: [<ffffffff822f7664>] fuse_open_common+0x1a4/0x290
[ 1001.555472] 
[ 1001.557082] =============================================
[ 1001.557082] 
[ 1001.564107] NMI backtrace for cpu 1
[ 1001.567721] CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.298-syzkaller #0
[ 1001.575139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 1001.584466] Call Trace:
[ 1001.587029]  dump_stack+0x1b2/0x281
[ 1001.590631]  nmi_cpu_backtrace.cold+0x57/0x93
[ 1001.595100]  ? irq_force_complete_move+0x350/0x350
[ 1001.600005]  nmi_trigger_cpumask_backtrace+0x13a/0x180
[ 1001.605256]  watchdog+0x5b9/0xb40
[ 1001.608683]  ? hungtask_pm_notify+0x50/0x50
[ 1001.612983]  kthread+0x30d/0x420
[ 1001.616324]  ? kthread_create_on_node+0xd0/0xd0
[ 1001.620967]  ret_from_fork+0x24/0x30
[ 1001.624751] Sending NMI from CPU 1 to CPUs 0:
[ 1001.629283] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8724adce
[ 1001.630280] Kernel panic - not syncing: hung_task: blocked tasks
[ 1001.642595] CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.298-syzkaller #0
[ 1001.650016] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 1001.659342] Call Trace:
[ 1001.661906]  dump_stack+0x1b2/0x281
[ 1001.665506]  panic+0x1f9/0x42d
[ 1001.668671]  ? add_taint.cold+0x16/0x16
[ 1001.672625]  watchdog+0x5ca/0xb40
[ 1001.676050]  ? hungtask_pm_notify+0x50/0x50
[ 1001.680357]  kthread+0x30d/0x420
[ 1001.683706]  ? kthread_create_on_node+0xd0/0xd0
[ 1001.688365]  ret_from_fork+0x24/0x30
[ 1001.692320] Kernel Offset: disabled
[ 1001.695929] Rebooting in 86400 seconds..