Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts.
syzkaller login: [  721.277782][ T1645] INFO: task syz-executor623:8451 can't die for more than 143 seconds.
[  721.286366][ T1645] task:syz-executor623 state:R  running task     stack:25824 pid: 8451 ppid:  8446 flags:0x00004006
[  721.300226][ T1645] Call Trace:
[  721.303577][ T1645]  ? find_held_lock+0x2d/0x110
[  721.309519][ T1645]  ? iget5_locked+0xac/0x2d0
[  721.314158][ T1645]  ? lock_downgrade+0x6d0/0x6d0
[  721.320678][ T1645]  ? lock_release+0x710/0x710
[  721.325391][ T1645]  ? iget5_locked+0xcc/0x2d0
[  721.331375][ T1645]  ? lock_downgrade+0x6d0/0x6d0
[  721.336379][ T1645]  ? do_raw_spin_unlock+0x171/0x230
[  721.342809][ T1645]  ? find_inode+0x109/0x220
[  721.347343][ T1645]  ? find_inode+0x1b8/0x220
[  721.353080][ T1645]  ? iget5_locked+0xac/0x2d0
[  721.358487][ T1645]  ? iget5_locked+0xbd/0x2d0
[  721.363248][ T1645]  ? fuse_inode_eq+0x80/0x80
[  721.370449][ T1645]  ? fuse_iget+0x24e/0x610
[  721.374908][ T1645]  ? fuse_change_attributes+0x610/0x610
[  721.381728][ T1645]  ? fuse_simple_request+0x3e8/0xd10
[  721.387058][ T1645]  ? fuse_lookup_name+0x447/0x630
[  721.393622][ T1645]  ? fuse_create+0x30/0x30
[  721.398964][ T1645]  ? find_held_lock+0x2d/0x110
[  721.403792][ T1645]  ? fuse_lookup.part.0+0xdf/0x390
[  721.410372][ T1645]  ? fuse_lookup_name+0x630/0x630
[  721.415572][ T1645]  ? lockdep_init_map_waits+0x26a/0x720
[  721.422566][ T1645]  ? fuse_lookup+0x70/0x90
[  721.427037][ T1645]  ? __lookup_slow+0x24c/0x480
[  721.433490][ T1645]  ? page_put_link+0x210/0x210
[  721.439193][ T1645]  ? inode_permission.part.0+0xab/0x410
[  721.444914][ T1645]  ? walk_component+0x418/0x6a0
[  721.451073][ T1645]  ? handle_dots.part.0+0x1520/0x1520
[  721.456603][ T1645]  ? walk_component+0x6a0/0x6a0
[  721.462660][ T1645]  ? path_lookupat+0x1ba/0x830
[  721.468329][ T1645]  ? filename_lookup+0x19f/0x560
[  721.473315][ T1645]  ? may_linkat+0x2b0/0x2b0
[  721.479074][ T1645]  ? memcpy+0x39/0x60
[  721.483340][ T1645]  ? getname_kernel+0x21e/0x370
[  721.489414][ T1645]  ? unix_find_other+0xd1/0x6f0
[  721.494381][ T1645]  ? unix_stream_recvmsg+0xf0/0xf0
[  721.501997][ T1645]  ? unix_dgram_sendmsg+0xc73/0x1a80
[  721.507338][ T1645]  ? unix_stream_sendpage+0xcb0/0xcb0
[  721.514081][ T1645]  ? aa_af_perm+0x230/0x230
[  721.519809][ T1645]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[  721.526143][ T1645]  ? unix_stream_sendpage+0xcb0/0xcb0
[  721.532778][ T1645]  ? sock_sendmsg+0xcf/0x120
[  721.537462][ T1645]  ? ____sys_sendmsg+0x331/0x810
[  721.543949][ T1645]  ? kernel_sendmsg+0x50/0x50
[  721.549724][ T1645]  ? do_recvmmsg+0x6c0/0x6c0
[  721.554357][ T1645]  ? __lock_acquire+0x16c2/0x54f0
[  721.560894][ T1645]  ? ___sys_sendmsg+0xf3/0x170
[  721.565695][ T1645]  ? sendmsg_copy_msghdr+0x160/0x160
[  721.572220][ T1645]  ? find_held_lock+0x2d/0x110
[  721.577026][ T1645]  ? 0xffffffff81000000
[  721.582384][ T1645]  ? __sys_sendmmsg+0x195/0x470
[  721.587275][ T1645]  ? __ia32_sys_sendmsg+0xb0/0xb0
[  721.593499][ T1645]  ? lock_downgrade+0x6d0/0x6d0
[  721.599189][ T1645]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[  721.605549][ T1645]  ? fd_install+0x215/0x640
[  721.611772][ T1645]  ? __do_sys_futex+0x2a2/0x470
[  721.616809][ T1645]  ? __do_sys_futex+0x2ab/0x470
[  721.622854][ T1645]  ? __x64_sys_sendmmsg+0x99/0x100
[  721.629918][ T1645]  ? syscall_enter_from_user_mode+0x1d/0x50
[  721.635887][ T1645]  ? do_syscall_64+0x2d/0x70
[  721.641706][ T1645]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  721.648692][ T1645] 
[  721.648692][ T1645] Showing all locks held in the system:
[  721.656573][ T1645] 1 lock held by khungtaskd/1645:
[  721.662800][ T1645]  #0: ffffffff8b370ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
[  721.673706][ T1645] 2 locks held by kworker/0:3/4917:
[  721.681377][ T1645]  #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0
[  721.692933][ T1645]  #1: ffff8880b9e20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440
[  721.705313][ T1645] 1 lock held by in:imklog/8138:
[  721.711165][ T1645]  #0: ffff888014132870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[  721.721522][ T1645] 2 locks held by syz-executor623/8451:
[  721.727111][ T1645] 
[  721.730753][ T1645] =============================================
[  721.730753][ T1645] 
[  721.739950][ T1645] Kernel panic - not syncing: hung_task: blocked tasks
[  721.746884][ T1645] CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.11.0-rc3-next-20210115-syzkaller #0
[  721.756441][ T1645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  721.766507][ T1645] Call Trace:
[  721.769799][ T1645]  dump_stack+0x107/0x163
[  721.774243][ T1645]  panic+0x306/0x73d
[  721.778160][ T1645]  ? __warn_printk+0xf3/0xf3
[  721.782778][ T1645]  ? watchdog.cold+0x22d/0x248
[  721.787586][ T1645]  watchdog.cold+0x23e/0x248
[  721.792202][ T1645]  ? trace_sched_process_hang+0x280/0x280
[  721.797973][ T1645]  kthread+0x3b1/0x4a0
[  721.802132][ T1645]  ? kthread_create_worker_on_cpu+0xf0/0xf0
[  721.808053][ T1645]  ret_from_fork+0x1f/0x30
[  721.813757][ T1645] Kernel Offset: disabled
[  721.818170][ T1645] Rebooting in 86400 seconds..