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

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts.
syzkaller login: [  721.401901][ T1666] INFO: task syz-executor923:8488 can't die for more than 143 seconds.
[  721.410404][ T1666] task:syz-executor923 state:R  running task     stack:28072 pid: 8488 ppid:  8483 flags:0x00004006
[  721.424699][ T1666] Call Trace:
[  721.428011][ T1666]  ? lockdep_hardirqs_on_prepare+0x420/0x420
[  721.435378][ T1666]  ? find_held_lock+0x2d/0x110
[  721.440180][ T1666]  ? lock_release+0x5c3/0x710
[  721.447830][ T1666]  ? lock_acquire+0x29d/0x750
[  721.454419][ T1666]  ? iget5_locked+0xac/0x2d0
[  721.459053][ T1666]  ? lock_release+0x710/0x710
[  721.465004][ T1666]  ? iget5_locked+0xcc/0x2d0
[  721.469638][ T1666]  ? lock_is_held_type+0x7e/0x100
[  721.477167][ T1666]  ? _raw_spin_unlock+0x12/0x40
[  721.482871][ T1666]  ? find_inode+0x109/0x220
[  721.487432][ T1666]  ? _raw_spin_lock+0x2a/0x40
[  721.493350][ T1666]  ? iput.part.0+0x5c/0x840
[  721.497880][ T1666]  ? iget5_locked+0xac/0x2d0
[  721.503703][ T1666]  ? fuse_iget+0x271/0x610
[  721.508157][ T1666]  ? fuse_change_attributes+0x610/0x610
[  721.515004][ T1666]  ? fuse_simple_request+0x3e8/0xd90
[  721.520319][ T1666]  ? fuse_lookup_name+0x447/0x630
[  721.526633][ T1666]  ? fuse_create+0x30/0x30
[  721.531074][ T1666]  ? find_held_lock+0x2d/0x110
[  721.537360][ T1666]  ? fuse_lookup.part.0+0xdf/0x390
[  721.543898][ T1666]  ? fuse_lookup_name+0x630/0x630
[  721.548987][ T1666]  ? lockdep_init_map_waits+0x26a/0x720
[  721.555965][ T1666]  ? fuse_lookup+0x70/0x90
[  721.560412][ T1666]  ? __lookup_slow+0x24c/0x480
[  721.566598][ T1666]  ? page_put_link+0x210/0x210
[  721.571416][ T1666]  ? inode_permission.part.0+0xab/0x410
[  721.578244][ T1666]  ? walk_component+0x418/0x6a0
[  721.583946][ T1666]  ? handle_dots.part.0+0x15a0/0x15a0
[  721.589355][ T1666]  ? walk_component+0x6a0/0x6a0
[  721.595450][ T1666]  ? path_lookupat+0x1ba/0x830
[  721.600249][ T1666]  ? filename_lookup+0x19f/0x560
[  721.607579][ T1666]  ? may_linkat+0x2b0/0x2b0
[  721.613032][ T1666]  ? __check_object_size+0x171/0x3f0
[  721.618363][ T1666]  ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[  721.625954][ T1666]  ? strncpy_from_user+0x2a0/0x3e0
[  721.631108][ T1666]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[  721.638633][ T1666]  ? getname_flags.part.0+0x1dd/0x4f0
[  721.645002][ T1666]  ? path_removexattr+0x7d/0x160
[  721.649963][ T1666]  ? removexattr+0x120/0x120
[  721.656053][ T1666]  ? __x64_sys_removexattr+0x55/0x80
[  721.661368][ T1666]  ? do_syscall_64+0x2d/0x70
[  721.667901][ T1666]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  721.675315][ T1666] 
[  721.675315][ T1666] Showing all locks held in the system:
[  721.684121][ T1666] 1 lock held by khungtaskd/1666:
[  721.689168][ T1666]  #0: ffffffff8b78f920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c
[  721.701794][ T1666] 1 lock held by in:imklog/8188:
[  721.706759][ T1666]  #0: ffff888024381770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  721.717218][ T1666] 2 locks held by syz-executor923/8488:
[  721.723653][ T1666] 
[  721.725986][ T1666] =============================================
[  721.725986][ T1666] 
[  721.736824][ T1666] Kernel panic - not syncing: hung_task: blocked tasks
[  721.743684][ T1666] CPU: 0 PID: 1666 Comm: khungtaskd Not tainted 5.10.0-next-20201215-syzkaller #0
[  721.752884][ T1666] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  721.762941][ T1666] Call Trace:
[  721.766228][ T1666]  dump_stack+0x107/0x163
[  721.770581][ T1666]  panic+0x343/0x77f
[  721.774490][ T1666]  ? __warn_printk+0xf3/0xf3
[  721.779102][ T1666]  ? watchdog.cold+0x146/0x31d
[  721.783889][ T1666]  watchdog.cold+0x157/0x31d
[  721.788498][ T1666]  ? trace_sched_process_hang+0x2a0/0x2a0
[  721.794231][ T1666]  kthread+0x3b1/0x4a0
[  721.798312][ T1666]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  721.804222][ T1666]  ret_from_fork+0x1f/0x30
[  721.809448][ T1666] Kernel Offset: disabled
[  721.813844][ T1666] Rebooting in 86400 seconds..