Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts.
syzkaller login: [ 716.168313][ T1669] INFO: task syz-executor204:8496 can't die for more than 143 seconds.
[ 716.176769][ T1669] task:syz-executor204 state:R running task stack:26384 pid: 8496 ppid: 8491 flags:0x00004006
[ 716.191069][ T1669] Call Trace:
[ 716.194369][ T1669] ? find_held_lock+0x2d/0x110
[ 716.200383][ T1669] ? lock_release+0x710/0x710
[ 716.205080][ T1669] ? iget5_locked+0xcc/0x2d0
[ 716.210829][ T1669] ? lock_downgrade+0x6d0/0x6d0
[ 716.215722][ T1669] ? fuse_init_file_inode+0x1e0/0x1e0
[ 716.222261][ T1669] ? _raw_spin_lock+0x2a/0x40
[ 716.226962][ T1669] ? find_inode+0x109/0x220
[ 716.233930][ T1669] ? fuse_init_file_inode+0x1e0/0x1e0
[ 716.240114][ T1669] ? fuse_init_file_inode+0x1e0/0x1e0
[ 716.245512][ T1669] ? _raw_spin_lock+0x2a/0x40
[ 716.251336][ T1669] ? _raw_spin_unlock+0x12/0x40
[ 716.256206][ T1669] ? iget5_locked+0xac/0x2d0
[ 716.261966][ T1669] ? fuse_inode_eq+0x80/0x80
[ 716.266579][ T1669] ? fuse_iget+0x271/0x610
[ 716.272166][ T1669] ? fuse_change_attributes+0x610/0x610
[ 716.277741][ T1669] ? fuse_simple_request+0x3e8/0xd90
[ 716.284203][ T1669] ? fuse_lookup_name+0x447/0x630
[ 716.290044][ T1669] ? fuse_create+0x30/0x30
[ 716.294477][ T1669] ? find_held_lock+0x2d/0x110
[ 716.300708][ T1669] ? fuse_lookup.part.0+0xdf/0x390
[ 716.305846][ T1669] ? fuse_lookup_name+0x630/0x630
[ 716.312546][ T1669] ? lockdep_init_map_waits+0x26a/0x720
[ 716.318935][ T1669] ? fuse_lookup+0x70/0x90
[ 716.323375][ T1669] ? __lookup_slow+0x24c/0x480
[ 716.329464][ T1669] ? page_put_link+0x210/0x210
[ 716.334289][ T1669] ? inode_permission.part.0+0xab/0x410
[ 716.341016][ T1669] ? walk_component+0x418/0x6a0
[ 716.345890][ T1669] ? handle_dots.part.0+0x15a0/0x15a0
[ 716.352472][ T1669] ? walk_component+0x6a0/0x6a0
[ 716.357361][ T1669] ? path_lookupat+0x1ba/0x830
[ 716.364935][ T1669] ? filename_lookup+0x19f/0x560
[ 716.370606][ T1669] ? may_linkat+0x2b0/0x2b0
[ 716.375154][ T1669] ? memcpy+0x39/0x60
[ 716.380273][ T1669] ? getname_kernel+0x21f/0x370
[ 716.385156][ T1669] ? unix_find_other+0xd1/0x6f0
[ 716.391145][ T1669] ? unix_stream_recvmsg+0xf0/0xf0
[ 716.396288][ T1669] ? unix_dgram_sendmsg+0xc73/0x1a80
[ 716.402858][ T1669] ? unix_stream_sendpage+0xcb0/0xcb0
[ 716.408967][ T1669] ? aa_af_perm+0x230/0x230
[ 716.413532][ T1669] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[ 716.421121][ T1669] ? unix_stream_sendpage+0xcb0/0xcb0
[ 716.426519][ T1669] ? sock_sendmsg+0xcf/0x120
[ 716.432541][ T1669] ? ____sys_sendmsg+0x331/0x810
[ 716.437503][ T1669] ? kernel_sendmsg+0x50/0x50
[ 716.443485][ T1669] ? do_recvmmsg+0x6c0/0x6c0
[ 716.448861][ T1669] ? __lock_acquire+0x16c2/0x54b0
[ 716.453915][ T1669] ? ___sys_sendmsg+0xf3/0x170
[ 716.459874][ T1669] ? sendmsg_copy_msghdr+0x160/0x160
[ 716.465191][ T1669] ? find_held_lock+0x2d/0x110
[ 716.471085][ T1669] ? 0xffffffff81000000
[ 716.475271][ T1669] ? __sys_sendmmsg+0x195/0x470
[ 716.481267][ T1669] ? __ia32_sys_sendmsg+0xb0/0xb0
[ 716.486313][ T1669] ? lock_downgrade+0x6d0/0x6d0
[ 716.493565][ T1669] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[ 716.500601][ T1669] ? fd_install+0x282/0x6e0
[ 716.505132][ T1669] ? __x64_sys_futex+0x3be/0x5e0
[ 716.511180][ T1669] ? __x64_sys_futex+0x3c8/0x5e0
[ 716.516163][ T1669] ? __x64_sys_sendmmsg+0x99/0x100
[ 716.522849][ T1669] ? syscall_enter_from_user_mode+0x1d/0x50
[ 716.529528][ T1669] ? do_syscall_64+0x2d/0x70
[ 716.534143][ T1669] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 716.541692][ T1669]
[ 716.541692][ T1669] Showing all locks held in the system:
[ 716.550571][ T1669] 1 lock held by khungtaskd/1669:
[ 716.555606][ T1669] #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c
[ 716.566719][ T1669] 1 lock held by in:imklog/8189:
[ 716.574101][ T1669] #0: ffff888020d96870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100
[ 716.584987][ T1669] 3 locks held by syz-executor204/8496:
[ 716.591326][ T1669]
[ 716.593658][ T1669] =============================================
[ 716.593658][ T1669]
[ 716.603479][ T1669] Kernel panic - not syncing: hung_task: blocked tasks
[ 716.610337][ T1669] CPU: 0 PID: 1669 Comm: khungtaskd Not tainted 5.10.0-next-20201218-syzkaller #0
[ 716.619537][ T1669] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 716.629599][ T1669] Call Trace:
[ 716.632882][ T1669] dump_stack+0x107/0x163
[ 716.637228][ T1669] panic+0x343/0x77f
[ 716.641128][ T1669] ? __warn_printk+0xf3/0xf3
[ 716.645744][ T1669] ? watchdog.cold+0x146/0x31d
[ 716.650527][ T1669] watchdog.cold+0x157/0x31d
[ 716.655128][ T1669] ? trace_sched_process_hang+0x2a0/0x2a0
[ 716.660860][ T1669] kthread+0x3b1/0x4a0
[ 716.664933][ T1669] ? kthread_create_worker_on_cpu+0xf0/0xf0
[ 716.670838][ T1669] ret_from_fork+0x1f/0x30
[ 716.675997][ T1669] Kernel Offset: disabled
[ 716.680323][ T1669] Rebooting in 86400 seconds..