INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. executing program [ 716.030962] INFO: task syz-executor662:3918 blocked for more than 140 seconds. [ 716.038508] Not tainted 4.9.112-g9e79039 #7 [ 716.043758] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.051945] syz-executor662 D28368 3918 3914 0x00000004 [ 716.057860] ffff8801b545e000 0000000000000000 ffff8801d750da40 ffff8801d9a6b000 [ 716.066295] ffff8801db321c18 ffff8801c6bb75d8 ffffffff839e907d ffffffff81235667 [ 716.074629] 0000000000000000 ffff8801b545e8c0 0000000600000007 ffff8801db3224e8 [ 716.082959] Call Trace: [ 716.085716] [] ? __schedule+0x64d/0x1bd0 [ 716.091794] [] ? mark_held_locks+0xc7/0x130 [ 716.097774] [] schedule+0x7f/0x1b0 [ 716.103300] [] rwsem_down_write_failed+0x598/0x990 [ 716.109873] [] ? rwsem_down_write_failed+0x18c/0x990 [ 716.116976] [] ? rwsem_down_write_failed_killable+0xb40/0xb40 [ 716.124865] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.132285] [] ? __lock_is_held+0xa2/0xf0 [ 716.138134] [] call_rwsem_down_write_failed+0x17/0x30 [ 716.145445] [] down_write+0x5c/0xa0 [ 716.150797] [] ? fuse_reverse_inval_entry+0xae/0x670 [ 716.158563] [] fuse_reverse_inval_entry+0xae/0x670 [ 716.165656] [] ? fuse_getattr+0x120/0x120 [ 716.171685] [] fuse_dev_do_write+0x98e/0x20a0 [ 716.177832] [] ? end_requests+0x140/0x140 [ 716.183905] [] ? __lock_acquire+0x654/0x4070 [ 716.189955] [] fuse_dev_write+0x14b/0x1e0 [ 716.196011] [] ? fuse_dev_splice_write+0xbf0/0xbf0 [ 716.202917] [] ? iov_iter_init+0xaf/0x1d0 [ 716.208771] [] __vfs_write+0x3e0/0x580 [ 716.214602] [] ? default_llseek+0x280/0x280 [ 716.220637] [] ? avc_policy_seqno+0x9/0x20 [ 716.226880] [] ? selinux_file_permission+0x82/0x470 [ 716.233822] [] ? rw_verify_area+0xe5/0x2b0 [ 716.239713] [] vfs_write+0x187/0x530 [ 716.245479] [] SyS_write+0xd9/0x1c0 [ 716.250755] [] ? SyS_read+0x1c0/0x1c0 [ 716.256675] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 716.263905] [] ? do_syscall_64+0x48/0x490 [ 716.269699] [] ? SyS_read+0x1c0/0x1c0 [ 716.275435] [] do_syscall_64+0x1a6/0x490 [ 716.282031] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.289035] [ 716.289035] Showing all locks held in the system: [ 716.295662] 2 locks held by khungtaskd/519: [ 716.299971] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 716.308806] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 716.318705] 2 locks held by getty/3779: [ 716.322676] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 716.332164] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 716.342222] 2 locks held by syz-executor662/3918: [ 716.347060] #0: (&fc->killsb){.+.+..}, at: [] fuse_dev_do_write+0x1b04/0x20a0 [ 716.356599] #1: (&type->i_mutex_dir_key#3){++++.+}, at: [] fuse_reverse_inval_entry+0xae/0x670 [ 716.367738] [ 716.369347] ============================================= [ 716.369347] [ 716.377015] NMI backtrace for cpu 0 [ 716.380659] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #7 [ 716.387857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.397210] ffff8801d8637d08 ffffffff81eb3249 0000000000000000 0000000000000000 [ 716.405285] 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8637d40 [ 716.413328] ffffffff81ebe547 0000000000000000 0000000000000000 0000000000000002 [ 716.421371] Call Trace: [ 716.424019] [] dump_stack+0xc1/0x128 [ 716.429421] [] ? irq_force_complete_move+0x320/0x320 [ 716.436179] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 716.442673] [] ? irq_force_complete_move+0x320/0x320 [ 716.449411] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 716.456500] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 716.463501] [] watchdog+0x6b4/0xa20 [ 716.468772] [] ? watchdog+0x11c/0xa20 [ 716.474254] [] kthread+0x26d/0x300 [ 716.479433] [] ? reset_hung_task_detector+0x20/0x20 [ 716.486181] [] ? kthread_park+0xa0/0xa0 [ 716.491792] [] ? kthread_park+0xa0/0xa0 [ 716.497402] [] ? kthread_park+0xa0/0xa0 [ 716.503023] [] ret_from_fork+0x5c/0x70 [ 716.508648] Sending NMI from CPU 0 to CPUs 1: [ 716.513833] NMI backtrace for cpu 1 [ 716.517459] CPU: 1 PID: 3917 Comm: syz-executor662 Not tainted 4.9.112-g9e79039 #7 [ 716.525141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.534471] task: ffff8801d9409800 task.stack: ffff8801b6958000 [ 716.540548] RIP: 0010:[] c [] __lock_acquire+0x5a5/0x4070 [ 716.549307] RSP: 0018:ffff8801b695f140 EFLAGS: 00000006 [ 716.554732] RAX: 0000000000000000 RBX: ffff8801d940a118 RCX: ffff8801d940a139 [ 716.561985] RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffff8801d940a13c [ 716.569249] RBP: ffff8801b695f2f0 R08: 0000000000000001 R09: 0000000000000001 [ 716.576499] R10: ffff8801d9409800 R11: 1ffff1003b281422 R12: 00000000000003e4 [ 716.583752] R13: 0000000000000002 R14: 0000000000000000 R15: ffff8801d940a13a [ 716.591092] FS: 00007ff090162700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 716.599307] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.605166] CR2: 00007ffcbbc29de8 CR3: 00000001d98d3000 CR4: 00000000001606f0 [ 716.612429] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.619763] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.627021] Stack: [ 716.629147] 0000000000000046c 0000000000000001c ffff8801d940a0c8c ffffed003b281418c [ 716.637360] ffff8801d9409800c dffffc0000000000c ffff8801b695f1c0c ffffffff81235667c [ 716.645564] 0000000000000000c ffff8801d940a0c0c ffffffff855f1f10c ffff8801d9409800c [ 716.654124] Call Trace: [ 716.656683] [] ? mark_held_locks+0xc7/0x130 [ 716.662636] [] ? debug_check_no_locks_freed+0x210/0x210 [ 716.669631] [] ? mark_held_locks+0xc7/0x130 [ 716.675749] [] ? finish_task_switch+0x1ed/0x640 [ 716.682058] [] ? mark_held_locks+0xc7/0x130 [ 716.688001] [] ? retint_kernel+0x2d/0x2d [ 716.693696] [] lock_acquire+0x130/0x3e0 [ 716.699301] [] ? prepare_to_wait_event+0x6b/0x450 [ 716.705778] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 716.712690] [] _raw_spin_lock_irqsave+0x4e/0x62 [ 716.718990] [] ? prepare_to_wait_event+0x6b/0x450 [ 716.725455] [] prepare_to_wait_event+0x6b/0x450 [ 716.731760] [] ? wake_up_atomic_t+0x30/0x30 [ 716.737720] [] ? __might_sleep+0x95/0x1a0 [ 716.743502] [] request_wait_answer+0x22e/0x6e0 [ 716.749733] [] ? flush_bg_queue+0x2b0/0x2b0 [ 716.755677] [] ? prepare_to_wait_event+0x450/0x450 [ 716.762243] [] ? __fuse_request_send+0xfe/0x1b0 [ 716.768554] [] __fuse_request_send+0x109/0x1b0 [ 716.774888] [] fuse_request_send+0x5d/0x70 [ 716.780754] [] fuse_simple_request+0x2f4/0x660 [ 716.787083] [] fuse_lookup_name+0x253/0x5d0 [ 716.793038] [] ? fuse_valid_type+0x70/0x70 [ 716.799057] [] fuse_lookup+0xed/0x3a0 [ 716.804579] [] ? fuse_lookup_name+0x5d0/0x5d0 [ 716.810874] [] ? __d_lookup_rcu+0x730/0x730 [ 716.816832] [] lookup_slow+0x23e/0x470 [ 716.822344] [] ? page_put_link+0xd0/0xd0 [ 716.828030] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 716.834756] [] walk_component+0x716/0x1bb0 [ 716.842093] [] ? fuse_allow_current_process.part.29+0x260/0x260 [ 716.849892] [] ? __inode_permission2+0x9b/0x2d0 [ 716.856370] [] ? path_init+0x1580/0x1580 [ 716.862071] [] ? link_path_walk+0x8a7/0x1200 [ 716.868115] [] ? walk_component+0x1bb0/0x1bb0 [ 716.874246] [] path_lookupat.isra.41+0x186/0x410 [ 716.880637] [] filename_lookup.part.55+0x177/0x370 [ 716.887198] [] ? filename_parentat.isra.53.part.54+0x3d0/0x3d0 [ 716.894804] [] ? strncpy_from_user+0x20d/0x2d0 [ 716.901013] [] ? getname_flags+0x23a/0x580 [ 716.906879] [] user_path_at_empty+0x53/0x70 [ 716.912914] [] vfs_fstatat+0xc6/0x170 [ 716.918338] [] ? vfs_fstat+0x80/0x80 [ 716.923674] [] ? debug_check_no_obj_freed+0x2ec/0x930 [ 716.930488] [] SYSC_newstat+0x86/0xf0 [ 716.935916] [] ? cp_new_stat+0x5c0/0x5c0 [ 716.941612] [] ? do_futex+0x17c0/0x17c0 [ 716.947209] [] ? SyS_mount+0x83/0x110 [ 716.952633] [] ? kasan_slab_free+0x88/0xc0 [ 716.959460] [] ? do_syscall_64+0x48/0x490 [ 716.965236] [] SyS_newstat+0x1d/0x30 [ 716.970574] [] ? SyS_fstat+0x30/0x30 [ 716.975920] [] do_syscall_64+0x1a6/0x490 [ 716.981615] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 716.988523] Code: c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c48 c89 cca c48 cc1 cea c03 c0f cb6 c04 c02 c48 c89 cca c83 ce2 c07 c38 cd0 c7f c08 c84 cc0 c0f c85 c1c c2f c00 c00 c80 c7b c21 c00 c<0f> c88 c94 c00 c00 c00 c49 c8d cba c48 c10 c00 c00 c48 cb8 c00 c00 c00 c00 c00 cfc c [ 717.025658] Kernel panic - not syncing: hung_task: blocked tasks [ 717.031825] CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.112-g9e79039 #7 [ 717.038996] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.048347] ffff8801d8637cc8 ffffffff81eb3249 ffffffff83c8bc20 00000000ffffffff [ 717.056497] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d8637d88 [ 717.064618] ffffffff81421a55 0000000041b58ab3 ffffffff843bae78 ffffffff81421896 [ 717.072692] Call Trace: [ 717.075270] [] dump_stack+0xc1/0x128 [ 717.080628] [] panic+0x1bf/0x3bc [ 717.085648] [] ? add_taint.cold.6+0x16/0x16 [ 717.091610] [] ? ___preempt_schedule+0x16/0x18 [ 717.097829] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 717.105543] [] watchdog+0x6c5/0xa20 [ 717.110820] [] ? watchdog+0x11c/0xa20 [ 717.116262] [] kthread+0x26d/0x300 [ 717.121440] [] ? reset_hung_task_detector+0x20/0x20 [ 717.128106] [] ? kthread_park+0xa0/0xa0 [ 717.133734] [] ? kthread_park+0xa0/0xa0 [ 717.139431] [] ? kthread_park+0xa0/0xa0 [ 717.145056] [] ret_from_fork+0x5c/0x70 [ 717.151324] Dumping ftrace buffer: [ 717.154894] (ftrace buffer empty) [ 717.158583] Kernel Offset: disabled [ 717.162200] Rebooting in 86400 seconds..