[  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 '10.128.0.41' (ECDSA) to the list of known hosts.
syzkaller login: [  721.532477][ T1657] INFO: task syz-executor425:8492 can't die for more than 143 seconds.
[  721.541666][ T1657] task:syz-executor425 state:R  running task     stack:27448 pid: 8492 ppid:  8490 flags:0x00004006
[  721.555878][ T1657] Call Trace:
[  721.559290][ T1657]  ? lock_is_held_type+0xac/0x100
[  721.566030][ T1657]  ? lock_release+0x5b7/0x710
[  721.570789][ T1657]  ? ilookup5_nowait+0x5e/0xb0
[  721.577572][ T1657]  ? lock_downgrade+0x6d0/0x6d0
[  721.584792][ T1657]  ? lock_release+0x710/0x710
[  721.589534][ T1657]  ? rwlock_bug.part.0+0x90/0x90
[  721.596208][ T1657]  ? ilookup5_nowait+0x7e/0xb0
[  721.601053][ T1657]  ? do_raw_spin_unlock+0x171/0x230
[  721.607808][ T1657]  ? _raw_spin_lock+0x2a/0x40
[  721.613629][ T1657]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.619128][ T1657]  ? _raw_spin_lock+0x2a/0x40
[  721.625670][ T1657]  ? ilookup5_nowait+0x5e/0xb0
[  721.630478][ T1657]  ? ilookup5_nowait+0x5e/0xb0
[  721.636768][ T1657]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.643483][ T1657]  ? iget5_locked+0x41/0x220
[  721.648123][ T1657]  ? fuse_inode_eq+0x80/0x80
[  721.654328][ T1657]  ? fuse_iget+0x271/0x610
[  721.658817][ T1657]  ? fuse_change_attributes+0x610/0x610
[  721.666014][ T1657]  ? fuse_readdir_uncached+0x11e0/0x1730
[  721.671783][ T1657]  ? fuse_emit+0xbe0/0xbe0
[  721.677744][ T1657]  ? lockdep_hardirqs_on_prepare+0x400/0x400
[  721.684896][ T1657]  ? __mutex_lock+0x61b/0x1110
[  721.689726][ T1657]  ? lock_release+0x710/0x710
[  721.695967][ T1657]  ? fuse_readdir+0x871/0x1830
[  721.700794][ T1657]  ? down_read_killable+0x1a4/0x480
[  721.707778][ T1657]  ? down_read+0x440/0x440
[  721.714614][ T1657]  ? security_file_permission+0x304/0x560
[  721.720463][ T1657]  ? iterate_dir+0x4eb/0x660
[  721.726750][ T1657]  ? __x64_sys_getdents+0x13a/0x2b0
[  721.732001][ T1657]  ? __do_sys_futex+0x2ab/0x470
[  721.738651][ T1657]  ? __ia32_sys_old_readdir+0x1c0/0x1c0
[  721.745390][ T1657]  ? filldir64+0x6a0/0x6a0
[  721.749869][ T1657]  ? syscall_enter_from_user_mode+0x1d/0x50
[  721.758333][ T1657]  ? do_syscall_64+0x2d/0x70
[  721.764028][ T1657]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  721.770246][ T1657] 
[  721.770246][ T1657] Showing all locks held in the system:
[  721.779818][ T1657] 1 lock held by khungtaskd/1657:
[  721.786983][ T1657]  #0: ffffffff8b363660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
[  721.798124][ T1657] 1 lock held by in:imklog/8179:
[  721.804182][ T1657]  #0: ffff8880113b20f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  721.814741][ T1657] 4 locks held by syz-executor425/8492:
[  721.820365][ T1657] 
[  721.824295][ T1657] =============================================
[  721.824295][ T1657] 
[  721.833863][ T1657] Kernel panic - not syncing: hung_task: blocked tasks
[  721.840818][ T1657] CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.10.0-next-20201223-syzkaller #0
[  721.850043][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  721.860158][ T1657] Call Trace:
[  721.863502][ T1657]  dump_stack+0x107/0x163
[  721.868154][ T1657]  panic+0x306/0x73d
[  721.872127][ T1657]  ? __warn_printk+0xf3/0xf3
[  721.876764][ T1657]  ? watchdog.cold+0x22d/0x248
[  721.881610][ T1657]  watchdog.cold+0x23e/0x248
[  721.886241][ T1657]  ? trace_sched_process_hang+0x280/0x280
[  721.892198][ T1657]  kthread+0x3b1/0x4a0
[  721.896403][ T1657]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  721.902346][ T1657]  ret_from_fork+0x1f/0x30
[  721.907607][ T1657] Kernel Offset: disabled
[  721.912014][ T1657] Rebooting in 86400 seconds..