Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1001.333173] INFO: task syz-executor272:7980 blocked for more than 140 seconds. [ 1001.340599] Not tainted 4.14.277-syzkaller #0 [ 1001.346847] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.355311] syz-executor272 D28408 7980 7978 0x00000004 [ 1001.360927] Call Trace: [ 1001.364054] __schedule+0x88b/0x1de0 [ 1001.367755] ? lock_acquire+0x170/0x3f0 [ 1001.371712] ? io_schedule_timeout+0x140/0x140 [ 1001.377068] ? _raw_spin_unlock+0x29/0x40 [ 1001.381213] ? fuse_writepage_locked+0xe80/0xe80 [ 1001.387161] schedule+0x8d/0x1b0 [ 1001.390517] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 1001.396653] ? fuse_do_ioctl+0x1570/0x1570 [ 1001.400989] ? end_page_writeback+0xe3/0x1c0 [ 1001.406266] ? wait_woken+0x230/0x230 [ 1001.410058] fuse_launder_page+0xa2/0xd0 [ 1001.414769] invalidate_inode_pages2_range+0x547/0xc00 [ 1001.420037] ? clear_shadow_entry+0x160/0x160 [ 1001.425082] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 1001.430009] ? fuse_file_alloc+0x1ca/0x260 [ 1001.434776] ? _raw_spin_unlock+0x29/0x40 [ 1001.438911] ? fuse_do_open+0x18e/0x460 [ 1001.442863] fuse_finish_open+0x262/0x500 [ 1001.447717] fuse_open_common+0x234/0x290 [ 1001.451852] do_dentry_open+0x44b/0xec0 [ 1001.456348] ? fuse_open_common+0x290/0x290 [ 1001.460653] ? __inode_permission+0xcd/0x2f0 [ 1001.465584] vfs_open+0x105/0x220 [ 1001.469021] path_openat+0x628/0x2970 [ 1001.472806] ? path_lookupat+0x780/0x780 [ 1001.477687] ? trace_hardirqs_on+0x10/0x10 [ 1001.481914] do_filp_open+0x179/0x3c0 [ 1001.486218] ? may_open_dev+0xe0/0xe0 [ 1001.490009] ? lock_downgrade+0x740/0x740 [ 1001.494683] ? do_raw_spin_unlock+0x164/0x220 [ 1001.499173] ? _raw_spin_unlock+0x29/0x40 [ 1001.503938] ? __alloc_fd+0x1be/0x490 [ 1001.507733] do_sys_open+0x296/0x410 [ 1001.511947] ? filp_open+0x60/0x60 [ 1001.516298] ? do_syscall_64+0x4c/0x640 [ 1001.520259] ? do_sys_open+0x410/0x410 [ 1001.524743] do_syscall_64+0x1d5/0x640 [ 1001.528618] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.534746] RIP: 0033:0x7f3fc6bed4c9 [ 1001.538442] RSP: 002b:00007f3fc6b9e2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1001.546729] RAX: ffffffffffffffda RBX: 00007f3fc6c7e4c0 RCX: 00007f3fc6bed4c9 [ 1001.554358] RDX: 0000000000000000 RSI: 0000000000000300 RDI: 0000000020000100 [ 1001.561610] RBP: 00007f3fc6c4b164 R08: 0000000000000000 R09: 0000000000000000 [ 1001.570182] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 1001.577783] R13: 00007f3fc6c47158 R14: 00007f3fc6c49160 R15: 00007f3fc6c7e4c8 [ 1001.585386] [ 1001.585386] Showing all locks held in the system: [ 1001.591696] 1 lock held by khungtaskd/1533: [ 1001.596118] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1001.605225] 1 lock held by in:imklog/7675: [ 1001.609522] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 1001.618033] 2 locks held by syz-executor272/7980: [ 1001.622857] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 1001.631310] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 1001.641396] [ 1001.643036] ============================================= [ 1001.643036] [ 1001.650113] NMI backtrace for cpu 1 [ 1001.653840] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.277-syzkaller #0 [ 1001.661262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.670590] Call Trace: [ 1001.673155] dump_stack+0x1b2/0x281 [ 1001.676758] nmi_cpu_backtrace.cold+0x57/0x93 [ 1001.681227] ? irq_force_complete_move+0x350/0x350 [ 1001.686129] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1001.691381] watchdog+0x5b9/0xb40 [ 1001.694810] ? hungtask_pm_notify+0x50/0x50 [ 1001.699105] kthread+0x30d/0x420 [ 1001.702442] ? kthread_create_on_node+0xd0/0xd0 [ 1001.707088] ret_from_fork+0x24/0x30 [ 1001.710912] Sending NMI from CPU 1 to CPUs 0: [ 1001.715688] NMI backtrace for cpu 0 [ 1001.715692] CPU: 0 PID: 8 Comm: rcu_preempt Not tainted 4.14.277-syzkaller #0 [ 1001.715696] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.715699] task: ffff8880b5420200 task.stack: ffff8880b5428000 [ 1001.715701] RIP: 0010:detach_if_pending+0x13a/0x430 [ 1001.715704] RSP: 0018:ffff8880b542fbd8 EFLAGS: 00000046 [ 1001.715708] RAX: dffffc0000000000 RBX: ffff8880b542fd18 RCX: 0000000000000000 [ 1001.715711] RDX: 1ffffffff192b53d RSI: 00000000ffffffff RDI: ffffffff8c95a9e8 [ 1001.715715] RBP: ffffffff8c95a9e0 R08: ffffffff8b9c42d0 R09: 0000000000000001 [ 1001.715718] R10: 0000000000000000 R11: ffff8880b5420200 R12: ffff8880ba42ccd8 [ 1001.715721] R13: 0000000000000001 R14: ffff8880b542fd20 R15: 0000000000000000 [ 1001.715724] FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 1001.715727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1001.715730] CR2: 00007ff1430eb018 CR3: 00000000a11f1000 CR4: 00000000003406f0 [ 1001.715733] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1001.715736] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1001.715738] Call Trace: [ 1001.715740] try_to_del_timer_sync+0x9a/0xe0 [ 1001.715742] ? detach_if_pending+0x430/0x430 [ 1001.715745] del_timer_sync+0x17c/0x240 [ 1001.715747] schedule_timeout+0x4b7/0xe90 [ 1001.715749] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1001.715751] ? usleep_range+0x130/0x130 [ 1001.715754] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1001.715756] ? prepare_to_swait+0x115/0x2a0 [ 1001.715758] ? run_timer_softirq+0x5a0/0x5a0 [ 1001.715760] rcu_gp_kthread+0xc0a/0x1e60 [ 1001.715763] ? force_qs_rnp+0x4f0/0x4f0 [ 1001.715765] ? force_qs_rnp+0x4f0/0x4f0 [ 1001.715767] kthread+0x30d/0x420 [ 1001.715769] ? kthread_create_on_node+0xd0/0xd0 [ 1001.715771] ret_from_fork+0x24/0x30 [ 1001.715773] Code: ec 02 00 00 48 85 ed 49 89 2c 24 74 28 e8 cf f1 0c 00 48 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 cc 02 00 00 4c 89 65 08 e8 a7 f1 0c 00 45 84 ed 74 0d e8 [ 1001.716538] Kernel panic - not syncing: hung_task: blocked tasks [ 1001.915473] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.277-syzkaller #0 [ 1001.922891] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.932233] Call Trace: [ 1001.934798] dump_stack+0x1b2/0x281 [ 1001.938400] panic+0x1f9/0x42d [ 1001.941565] ? add_taint.cold+0x16/0x16 [ 1001.945516] watchdog+0x5ca/0xb40 [ 1001.948966] ? hungtask_pm_notify+0x50/0x50 [ 1001.953264] kthread+0x30d/0x420 [ 1001.956604] ? kthread_create_on_node+0xd0/0xd0 [ 1001.961255] ret_from_fork+0x24/0x30 [ 1001.965217] Kernel Offset: disabled [ 1001.968933] Rebooting in 86400 seconds..