Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. syzkaller login: [ 721.291683][ T1667] INFO: task syz-executor967:8424 can't die for more than 143 seconds. [ 721.300766][ T1667] task:syz-executor967 state:R running task stack:27048 pid: 8424 ppid: 8422 flags:0x00004006 [ 721.313303][ T1667] Call Trace: [ 721.316722][ T1667] ? find_inode+0x109/0x220 [ 721.323891][ T1667] ? lock_acquire+0xb8/0x720 [ 721.328799][ T1667] ? iget5_locked+0xac/0x2d0 [ 721.334702][ T1667] ? iget5_locked+0xcc/0x2d0 [ 721.339340][ T1667] ? lock_downgrade+0x6d0/0x6d0 [ 721.345769][ T1667] ? fuse_init_file_inode+0x1e0/0x1e0 [ 721.352193][ T1667] ? _raw_spin_lock+0x2a/0x40 [ 721.356979][ T1667] ? fuse_init_file_inode+0x1e0/0x1e0 [ 721.363779][ T1667] ? fuse_init_file_inode+0x1e0/0x1e0 [ 721.369250][ T1667] ? _raw_spin_lock+0x2a/0x40 [ 721.375387][ T1667] ? iget5_locked+0xac/0x2d0 [ 721.380297][ T1667] ? iget5_locked+0xbd/0x2d0 [ 721.386102][ T1667] ? fuse_inode_eq+0x80/0x80 [ 721.390912][ T1667] ? fuse_iget+0x271/0x610 [ 721.396407][ T1667] ? fuse_change_attributes+0x610/0x610 [ 721.403743][ T1667] ? fuse_simple_request+0x3e8/0xd10 [ 721.409569][ T1667] ? fuse_lookup_name+0x447/0x630 [ 721.416936][ T1667] ? fuse_create+0x30/0x30 [ 721.427098][ T1667] ? lockdep_unlock+0x11c/0x290 [ 721.433192][ T1667] ? __lock_acquire+0x2506/0x54c0 [ 721.438674][ T1667] ? fuse_lookup.part.0+0xdf/0x390 [ 721.445079][ T1667] ? fuse_lookup_name+0x630/0x630 [ 721.450390][ T1667] ? find_held_lock+0x2d/0x110 [ 721.458084][ T1667] ? do_raw_spin_unlock+0x171/0x230 [ 721.464762][ T1667] ? fuse_lookup+0x70/0x90 [ 721.469224][ T1667] ? __lookup_hash+0x117/0x180 [ 721.476018][ T1667] ? filename_create+0x186/0x490 [ 721.481364][ T1667] ? filename_parentat+0x560/0x560 [ 721.487871][ T1667] ? getname_flags.part.0+0x1dd/0x4f0 [ 721.494211][ T1667] ? do_mkdirat+0xa0/0x310 [ 721.498686][ T1667] ? user_path_create+0xf0/0xf0 [ 721.505335][ T1667] ? syscall_enter_from_user_mode+0x1d/0x50 [ 721.512358][ T1667] ? do_syscall_64+0x2d/0x70 [ 721.517153][ T1667] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 721.524710][ T1667] [ 721.524710][ T1667] Showing all locks held in the system: [ 721.533686][ T1667] 1 lock held by khungtaskd/1667: [ 721.538755][ T1667] #0: ffffffff8b571460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 721.551229][ T1667] 1 lock held by in:imklog/8116: [ 721.557042][ T1667] #0: ffff8880260a8870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 721.567402][ T1667] 3 locks held by syz-executor967/8424: [ 721.574209][ T1667] [ 721.576676][ T1667] ============================================= [ 721.576676][ T1667] [ 721.587741][ T1667] Kernel panic - not syncing: hung_task: blocked tasks [ 721.594731][ T1667] CPU: 1 PID: 1667 Comm: khungtaskd Not tainted 5.11.0-rc5-next-20210129-syzkaller #0 [ 721.604375][ T1667] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 721.614524][ T1667] Call Trace: [ 721.617905][ T1667] dump_stack+0x107/0x163 [ 721.622524][ T1667] panic+0x306/0x73d [ 721.626436][ T1667] ? __warn_printk+0xf3/0xf3 [ 721.631075][ T1667] ? watchdog.cold+0x22d/0x248 [ 721.635917][ T1667] watchdog.cold+0x23e/0x248 [ 721.640643][ T1667] ? trace_sched_process_hang+0x280/0x280 [ 721.646601][ T1667] kthread+0x3b1/0x4a0 [ 721.650775][ T1667] ? __kthread_bind_mask+0xc0/0xc0 [ 721.655910][ T1667] ret_from_fork+0x1f/0x30 [ 721.662134][ T1667] Kernel Offset: disabled [ 721.666883][ T1667] Rebooting in 86400 seconds..