[  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 '10.128.10.43' (ECDSA) to the list of known hosts.
syzkaller login: [  721.358626][ T1661] INFO: task syz-executor259:8519 can't die for more than 143 seconds.
[  721.367113][ T1661] task:syz-executor259 state:R  running task     stack:27904 pid: 8519 ppid:  8514 flags:0x00004006
[  721.383255][ T1661] Call Trace:
[  721.386561][ T1661]  ? lockdep_hardirqs_on_prepare+0x420/0x420
[  721.394229][ T1661]  ? rcu_read_lock_sched_held+0x3a/0x70
[  721.400884][ T1661]  ? lock_acquire+0x5d3/0x750
[  721.405679][ T1661]  ? lock_downgrade+0x6d0/0x6d0
[  721.413190][ T1661]  ? iget5_locked+0xcc/0x2d0
[  721.417810][ T1661]  ? lock_downgrade+0x6d0/0x6d0
[  721.424100][ T1661]  ? find_inode+0x109/0x220
[  721.429638][ T1661]  ? fuse_init_file_inode+0x1e0/0x1e0
[  721.435142][ T1661]  ? iget5_locked+0xac/0x2d0
[  721.441191][ T1661]  ? fuse_inode_eq+0x80/0x80
[  721.445817][ T1661]  ? fuse_iget+0x271/0x610
[  721.451678][ T1661]  ? fuse_change_attributes+0x610/0x610
[  721.457264][ T1661]  ? fuse_simple_request+0x3e8/0xd90
[  721.464112][ T1661]  ? fuse_lookup_name+0x447/0x630
[  721.470061][ T1661]  ? fuse_create+0x30/0x30
[  721.474611][ T1661]  ? find_held_lock+0x2d/0x110
[  721.480926][ T1661]  ? mark_held_locks+0x9f/0xe0
[  721.485736][ T1661]  ? fuse_lookup.part.0+0xdf/0x390
[  721.493627][ T1661]  ? d_alloc_parallel+0x938/0x1ae0
[  721.499795][ T1661]  ? fuse_lookup_name+0x630/0x630
[  721.504858][ T1661]  ? lock_downgrade+0x6d0/0x6d0
[  721.512602][ T1661]  ? __d_lookup+0x477/0x760
[  721.517149][ T1661]  ? fuse_atomic_open+0x2de/0x440
[  721.523540][ T1661]  ? fuse_lookup+0x90/0x90
[  721.528073][ T1661]  ? lookup_open.isra.0+0xc3d/0x13d0
[  721.534772][ T1661]  ? vfs_unlink+0x600/0x600
[  721.540259][ T1661]  ? path_openat+0x9af/0x27a0
[  721.544982][ T1661]  ? path_lookupat+0x830/0x830
[  721.551061][ T1661]  ? lockdep_hardirqs_on_prepare+0x420/0x420
[  721.557088][ T1661]  ? do_filp_open+0x17e/0x3c0
[  721.563709][ T1661]  ? may_open_dev+0xf0/0xf0
[  721.568250][ T1661]  ? do_raw_spin_lock+0x120/0x2b0
[  721.574709][ T1661]  ? rwlock_bug.part.0+0x90/0x90
[  721.580570][ T1661]  ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[  721.586854][ T1661]  ? _raw_spin_unlock+0x24/0x40
[  721.593254][ T1661]  ? alloc_fd+0x2da/0x650
[  721.597631][ T1661]  ? do_sys_openat2+0x16d/0x420
[  721.604280][ T1661]  ? build_open_flags+0x680/0x680
[  721.610558][ T1661]  ? find_held_lock+0x2d/0x110
[  721.615359][ T1661]  ? __x64_sys_openat+0x13f/0x1f0
[  721.621741][ T1661]  ? __ia32_sys_open+0x1c0/0x1c0
[  721.626716][ T1661]  ? syscall_enter_from_user_mode+0x1d/0x50
[  721.634145][ T1661]  ? do_syscall_64+0x2d/0x70
[  721.640967][ T1661]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  721.647171][ T1661] 
[  721.647171][ T1661] Showing all locks held in the system:
[  721.656317][ T1661] 1 lock held by khungtaskd/1661:
[  721.662265][ T1661]  #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c
[  721.673085][ T1661] 1 lock held by in:imklog/8339:
[  721.678039][ T1661]  #0: ffff888012a405f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  721.688466][ T1661] 2 locks held by rs:main Q:Reg/8340:
[  721.693883][ T1661]  #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x235/0x21b0
[  721.704950][ T1661]  #1: ffff8880b9d20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440
[  721.717096][ T1661] 3 locks held by syz-executor259/8519:
[  721.723677][ T1661] 
[  721.726012][ T1661] =============================================
[  721.726012][ T1661] 
[  721.736006][ T1661] Kernel panic - not syncing: hung_task: blocked tasks
[  721.742884][ T1661] CPU: 0 PID: 1661 Comm: khungtaskd Not tainted 5.10.0-next-20201223-syzkaller #0
[  721.752092][ T1661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  721.762163][ T1661] Call Trace:
[  721.765455][ T1661]  dump_stack+0x107/0x163
[  721.769803][ T1661]  panic+0x343/0x77f
[  721.773711][ T1661]  ? __warn_printk+0xf3/0xf3
[  721.778323][ T1661]  ? watchdog.cold+0x146/0x31d
[  721.783106][ T1661]  watchdog.cold+0x157/0x31d
[  721.787733][ T1661]  ? trace_sched_process_hang+0x2a0/0x2a0
[  721.793475][ T1661]  kthread+0x3b1/0x4a0
[  721.797551][ T1661]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  721.803457][ T1661]  ret_from_fork+0x1f/0x30
[  721.808486][ T1661] Kernel Offset: disabled
[  721.812815][ T1661] Rebooting in 86400 seconds..