[  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 '10.128.0.108' (ECDSA) to the list of known hosts.
syzkaller login: [  721.601488][ T1657] INFO: task syz-executor423:8509 can't die for more than 143 seconds.
[  721.610192][ T1657] task:syz-executor423 state:R  running task     stack:27128 pid: 8509 ppid:  8507 flags:0x00004006
[  721.625674][ T1657] Call Trace:
[  721.629124][ T1657]  ? find_inode+0x1b8/0x220
[  721.635782][ T1657]  ? find_held_lock+0x2d/0x110
[  721.640613][ T1657]  ? do_raw_spin_lock+0x120/0x2b0
[  721.648959][ T1657]  ? rcu_read_lock_sched_held+0x3a/0x70
[  721.655846][ T1657]  ? iget5_locked+0xcc/0x2d0
[  721.660765][ T1657]  ? lock_downgrade+0x6d0/0x6d0
[  721.667098][ T1657]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.673564][ T1657]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.679147][ T1657]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.686162][ T1657]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[  721.693489][ T1657]  ? iget5_locked+0xac/0x2d0
[  721.698306][ T1657]  ? fuse_inode_eq+0x80/0x80
[  721.704301][ T1657]  ? fuse_iget+0x271/0x610
[  721.708914][ T1657]  ? fuse_change_attributes+0x610/0x610
[  721.716169][ T1657]  ? fuse_readdir_uncached+0x11e0/0x1730
[  721.722927][ T1657]  ? fuse_emit+0xc10/0xc10
[  721.727651][ T1657]  ? lockdep_hardirqs_on_prepare+0x420/0x420
[  721.735206][ T1657]  ? __mutex_lock+0x61b/0x1110
[  721.740057][ T1657]  ? lock_release+0x710/0x710
[  721.746186][ T1657]  ? fuse_readdir+0x842/0x1830
[  721.751000][ T1657]  ? down_read_killable+0x1a4/0x4a0
[  721.759359][ T1657]  ? down_read_interruptible+0x4a0/0x4a0
[  721.766012][ T1657]  ? security_file_permission+0x304/0x560
[  721.772869][ T1657]  ? iterate_dir+0x4eb/0x660
[  721.777659][ T1657]  ? __x64_sys_getdents+0x13a/0x2b0
[  721.784216][ T1657]  ? __ia32_sys_old_readdir+0x1c0/0x1c0
[  721.789941][ T1657]  ? filldir64+0x6a0/0x6a0
[  721.795812][ T1657]  ? syscall_enter_from_user_mode+0x1d/0x50
[  721.802666][ T1657]  ? do_syscall_64+0x2d/0x70
[  721.807438][ T1657]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  721.814980][ T1657] 
[  721.814980][ T1657] Showing all locks held in the system:
[  721.823609][ T1657] 1 lock held by khungtaskd/1657:
[  721.828796][ T1657]  #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c
[  721.841351][ T1657] 1 lock held by in:imklog/8212:
[  721.846454][ T1657]  #0: ffff88801379eff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  721.857293][ T1657] 4 locks held by syz-executor423/8509:
[  721.864417][ T1657] 
[  721.866799][ T1657] =============================================
[  721.866799][ T1657] 
[  721.877538][ T1657] Kernel panic - not syncing: hung_task: blocked tasks
[  721.884524][ T1657] CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.10.0-next-20201223-syzkaller #0
[  721.894056][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  721.904512][ T1657] Call Trace:
[  721.907826][ T1657]  dump_stack+0x107/0x163
[  721.912193][ T1657]  panic+0x343/0x77f
[  721.916233][ T1657]  ? __warn_printk+0xf3/0xf3
[  721.920865][ T1657]  ? watchdog.cold+0x146/0x31d
[  721.925668][ T1657]  watchdog.cold+0x157/0x31d
[  721.930289][ T1657]  ? trace_sched_process_hang+0x2a0/0x2a0
[  721.936181][ T1657]  kthread+0x3b1/0x4a0
[  721.940277][ T1657]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  721.946415][ T1657]  ret_from_fork+0x1f/0x30
[  721.951179][ T1657] Kernel Offset: disabled
[  721.955528][ T1657] Rebooting in 86400 seconds..