Warning: Permanently added '10.128.0.134' (ECDSA) to the list of known hosts.
syzkaller login: [  716.192186][ T1665] INFO: task syz-executor399:8499 can't die for more than 143 seconds.
[  716.200642][ T1665] task:syz-executor399 state:R  running task     stack:27176 pid: 8499 ppid:  8494 flags:0x00004006
[  716.215357][ T1665] Call Trace:
[  716.218666][ T1665]  ? find_held_lock+0x2d/0x110
[  716.225154][ T1665]  ? lock_release+0x710/0x710
[  716.229868][ T1665]  ? lock_release+0x710/0x710
[  716.235747][ T1665]  ? iget5_locked+0xcc/0x2d0
[  716.240354][ T1665]  ? lock_downgrade+0x6d0/0x6d0
[  716.246407][ T1665]  ? do_raw_spin_unlock+0x171/0x230
[  716.251633][ T1665]  ? fuse_init_file_inode+0x1e0/0x1e0
[  716.258278][ T1665]  ? find_inode+0x109/0x220
[  716.263624][ T1665]  ? fuse_init_file_inode+0x1e0/0x1e0
[  716.269033][ T1665]  ? iget5_locked+0xbd/0x2d0
[  716.274810][ T1665]  ? fuse_inode_eq+0x80/0x80
[  716.279426][ T1665]  ? fuse_iget+0x271/0x610
[  716.285075][ T1665]  ? fuse_change_attributes+0x610/0x610
[  716.290658][ T1665]  ? fuse_simple_request+0x3e8/0xd90
[  716.297153][ T1665]  ? fuse_lookup_name+0x447/0x630
[  716.303025][ T1665]  ? fuse_create+0x30/0x30
[  716.307465][ T1665]  ? find_held_lock+0x2d/0x110
[  716.313857][ T1665]  ? mark_held_locks+0x9f/0xe0
[  716.318672][ T1665]  ? fuse_lookup.part.0+0xdf/0x390
[  716.325178][ T1665]  ? d_alloc_parallel+0x938/0x1ae0
[  716.330317][ T1665]  ? fuse_lookup_name+0x630/0x630
[  716.336994][ T1665]  ? lock_downgrade+0x6d0/0x6d0
[  716.343258][ T1665]  ? __d_lookup+0x477/0x760
[  716.347796][ T1665]  ? fuse_atomic_open+0x2de/0x440
[  716.352899][ T1665]  ? fuse_lookup+0x90/0x90
[  716.357510][ T1665]  ? lookup_open.isra.0+0xc3d/0x13d0
[  716.363107][ T1665]  ? vfs_unlink+0x600/0x600
[  716.367675][ T1665]  ? path_openat+0x9af/0x27a0
[  716.372471][ T1665]  ? path_lookupat+0x830/0x830
[  716.377455][ T1665]  ? lockdep_hardirqs_on_prepare+0x420/0x420
[  716.383535][ T1665]  ? do_filp_open+0x17e/0x3c0
[  716.388407][ T1665]  ? may_open_dev+0xf0/0xf0
[  716.392997][ T1665]  ? do_raw_spin_lock+0x120/0x2b0
[  716.398209][ T1665]  ? rwlock_bug.part.0+0x90/0x90
[  716.403231][ T1665]  ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[  716.409670][ T1665]  ? _raw_spin_unlock+0x24/0x40
[  716.414628][ T1665]  ? alloc_fd+0x2da/0x650
[  716.419150][ T1665]  ? do_sys_openat2+0x16d/0x420
[  716.424088][ T1665]  ? build_open_flags+0x680/0x680
[  716.429311][ T1665]  ? find_held_lock+0x2d/0x110
[  716.434173][ T1665]  ? __x64_sys_openat+0x13f/0x1f0
[  716.439388][ T1665]  ? __ia32_sys_open+0x1c0/0x1c0
[  716.444989][ T1665]  ? syscall_enter_from_user_mode+0x1d/0x50
[  716.450915][ T1665]  ? do_syscall_64+0x2d/0x70
[  716.455605][ T1665]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  716.461901][ T1665] 
[  716.461901][ T1665] Showing all locks held in the system:
[  716.469622][ T1665] 1 lock held by khungtaskd/1665:
[  716.476134][ T1665]  #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c
[  716.486172][ T1665] 2 locks held by in:imklog/8185:
[  716.491488][ T1665]  #0: ffff8880219a5270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  716.500761][ T1665]  #1: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: __schedule+0x235/0x21b0
[  716.510224][ T1665] 2 locks held by syz-executor399/8499:
[  716.516081][ T1665] 
[  716.518413][ T1665] =============================================
[  716.518413][ T1665] 
[  716.526934][ T1665] Kernel panic - not syncing: hung_task: blocked tasks
[  716.533781][ T1665] CPU: 0 PID: 1665 Comm: khungtaskd Not tainted 5.10.0-next-20201218-syzkaller #0
[  716.542987][ T1665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  716.553048][ T1665] Call Trace:
[  716.556331][ T1665]  dump_stack+0x107/0x163
[  716.560673][ T1665]  panic+0x343/0x77f
[  716.564574][ T1665]  ? __warn_printk+0xf3/0xf3
[  716.569187][ T1665]  ? watchdog.cold+0x146/0x31d
[  716.573965][ T1665]  watchdog.cold+0x157/0x31d
[  716.578569][ T1665]  ? trace_sched_process_hang+0x2a0/0x2a0
[  716.584321][ T1665]  kthread+0x3b1/0x4a0
[  716.588397][ T1665]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  716.594300][ T1665]  ret_from_fork+0x1f/0x30
[  716.599595][ T1665] Kernel Offset: disabled
[  716.603918][ T1665] Rebooting in 86400 seconds..