Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. syzkaller login: [ 721.486494][ T1660] INFO: task syz-executor252:8531 can't die for more than 143 seconds. [ 721.494972][ T1660] task:syz-executor252 state:R running task stack:27408 pid: 8531 ppid: 8529 flags:0x00004006 [ 721.508201][ T1660] Call Trace: [ 721.511552][ T1660] ? find_held_lock+0x2d/0x110 [ 721.518062][ T1660] ? find_inode+0x1b8/0x220 [ 721.522632][ T1660] ? find_held_lock+0x2d/0x110 [ 721.528567][ T1660] ? lock_release+0x710/0x710 [ 721.533273][ T1660] ? rwlock_bug.part.0+0x90/0x90 [ 721.539390][ T1660] ? ilookup5_nowait+0x7e/0xb0 [ 721.544174][ T1660] ? lock_downgrade+0x6d0/0x6d0 [ 721.550220][ T1660] ? _raw_spin_lock+0x2a/0x40 [ 721.554975][ T1660] ? fuse_init_file_inode+0x1e0/0x1e0 [ 721.561562][ T1660] ? _raw_spin_lock+0x2a/0x40 [ 721.566272][ T1660] ? ilookup5_nowait+0x5e/0xb0 [ 721.572172][ T1660] ? fuse_init_file_inode+0x1e0/0x1e0 [ 721.578529][ T1660] ? iget5_locked+0x41/0x220 [ 721.583149][ T1660] ? fuse_inode_eq+0x80/0x80 [ 721.588998][ T1660] ? fuse_iget+0x271/0x610 [ 721.593442][ T1660] ? fuse_change_attributes+0x610/0x610 [ 721.601788][ T1660] ? fuse_simple_request+0x3e8/0xd10 [ 721.607882][ T1660] ? fuse_lookup_name+0x447/0x630 [ 721.612936][ T1660] ? fuse_create+0x30/0x30 [ 721.618760][ T1660] ? find_held_lock+0x2d/0x110 [ 721.623575][ T1660] ? fuse_lookup.part.0+0xdf/0x390 [ 721.629992][ T1660] ? fuse_lookup_name+0x630/0x630 [ 721.635072][ T1660] ? lockdep_init_map_waits+0x26a/0x720 [ 721.642064][ T1660] ? fuse_lookup+0x70/0x90 [ 721.647266][ T1660] ? __lookup_slow+0x24c/0x480 [ 721.652112][ T1660] ? page_put_link+0x210/0x210 [ 721.658310][ T1660] ? inode_permission.part.0+0xab/0x410 [ 721.663893][ T1660] ? walk_component+0x418/0x6a0 [ 721.670040][ T1660] ? handle_dots.part.0+0x1520/0x1520 [ 721.675432][ T1660] ? walk_component+0x6a0/0x6a0 [ 721.681450][ T1660] ? path_lookupat+0x1ba/0x830 [ 721.686237][ T1660] ? filename_lookup+0x19f/0x560 [ 721.692404][ T1660] ? may_linkat+0x2b0/0x2b0 [ 721.697691][ T1660] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.704057][ T1660] ? __check_object_size+0x171/0x3f0 [ 721.710522][ T1660] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 721.717609][ T1660] ? strncpy_from_user+0x2a0/0x3e0 [ 721.722794][ T1660] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 721.731437][ T1660] ? getname_flags.part.0+0x1dd/0x4f0 [ 721.737609][ T1660] ? path_setxattr+0x95/0x190 [ 721.742356][ T1660] ? setxattr+0x290/0x290 [ 721.748156][ T1660] ? __x64_sys_lsetxattr+0xbd/0x150 [ 721.753378][ T1660] ? syscall_enter_from_user_mode+0x1d/0x50 [ 721.760808][ T1660] ? do_syscall_64+0x2d/0x70 [ 721.765420][ T1660] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.772909][ T1660] [ 721.772909][ T1660] Showing all locks held in the system: [ 721.781478][ T1660] 1 lock held by khungtaskd/1660: [ 721.787493][ T1660] #0: ffffffff8b363ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.798253][ T1660] 1 lock held by in:imklog/8214: [ 721.803199][ T1660] #0: ffff888026c0f770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.813605][ T1660] 2 locks held by syz-executor252/8531: [ 721.821184][ T1660] [ 721.823523][ T1660] ============================================= [ 721.823523][ T1660] [ 721.833868][ T1660] Kernel panic - not syncing: hung_task: blocked tasks [ 721.840740][ T1660] CPU: 0 PID: 1660 Comm: khungtaskd Not tainted 5.11.0-rc2-next-20210107-syzkaller #0 [ 721.850371][ T1660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.860426][ T1660] Call Trace: [ 721.863704][ T1660] dump_stack+0x107/0x163 [ 721.868072][ T1660] panic+0x306/0x73d [ 721.871973][ T1660] ? __warn_printk+0xf3/0xf3 [ 721.876578][ T1660] ? watchdog.cold+0x22d/0x248 [ 721.881364][ T1660] watchdog.cold+0x23e/0x248 [ 721.885969][ T1660] ? trace_sched_process_hang+0x280/0x280 [ 721.891703][ T1660] kthread+0x3b1/0x4a0 [ 721.895821][ T1660] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.901723][ T1660] ret_from_fork+0x1f/0x30 [ 721.907104][ T1660] Kernel Offset: disabled [ 721.911479][ T1660] Rebooting in 86400 seconds..