Warning: Permanently added '10.128.1.123' (ECDSA) to the list of known hosts. [ 1001.333055] INFO: task syz-executor100:7987 blocked for more than 140 seconds. [ 1001.340471] Not tainted 4.14.272-syzkaller #0 [ 1001.346406] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.354411] syz-executor100 D28376 7987 7985 0x00000004 [ 1001.360020] Call Trace: [ 1001.362589] __schedule+0x88b/0x1de0 [ 1001.366342] ? lock_acquire+0x170/0x3f0 [ 1001.370312] ? io_schedule_timeout+0x140/0x140 [ 1001.374915] ? _raw_spin_unlock+0x29/0x40 [ 1001.379055] ? fuse_writepage_locked+0xe80/0xe80 [ 1001.383827] schedule+0x8d/0x1b0 [ 1001.387183] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 1001.392786] ? fuse_do_ioctl+0x1570/0x1570 [ 1001.397042] ? end_page_writeback+0xe3/0x1c0 [ 1001.401439] ? wait_woken+0x230/0x230 [ 1001.405265] fuse_launder_page+0xa2/0xd0 [ 1001.409315] invalidate_inode_pages2_range+0x547/0xc00 [ 1001.414615] ? clear_shadow_entry+0x160/0x160 [ 1001.419097] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 1001.424046] ? fuse_file_alloc+0x1ca/0x260 [ 1001.428276] ? _raw_spin_unlock+0x29/0x40 [ 1001.432500] ? fuse_do_open+0x18e/0x460 [ 1001.436645] fuse_finish_open+0x262/0x500 [ 1001.440782] fuse_open_common+0x234/0x290 [ 1001.444949] do_dentry_open+0x44b/0xec0 [ 1001.448922] ? fuse_open_common+0x290/0x290 [ 1001.453269] ? __inode_permission+0xcd/0x2f0 [ 1001.457666] vfs_open+0x105/0x220 [ 1001.461098] path_openat+0x628/0x2970 [ 1001.464925] ? path_lookupat+0x780/0x780 [ 1001.468981] ? trace_hardirqs_on+0x10/0x10 [ 1001.473252] do_filp_open+0x179/0x3c0 [ 1001.477043] ? may_open_dev+0xe0/0xe0 [ 1001.480827] ? lock_downgrade+0x740/0x740 [ 1001.484999] ? do_raw_spin_unlock+0x164/0x220 [ 1001.489494] ? _raw_spin_unlock+0x29/0x40 [ 1001.493685] ? __alloc_fd+0x1be/0x490 [ 1001.497476] do_sys_open+0x296/0x410 [ 1001.501169] ? filp_open+0x60/0x60 [ 1001.504754] ? do_syscall_64+0x4c/0x640 [ 1001.508714] ? compat_SyS_openat+0x30/0x30 [ 1001.512973] do_syscall_64+0x1d5/0x640 [ 1001.516850] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.522045] RIP: 0033:0x7fd5c2be74b9 [ 1001.525785] RSP: 002b:00007fd5c2b982f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 1001.533528] RAX: ffffffffffffffda RBX: 00007fd5c2c784c0 RCX: 00007fd5c2be74b9 [ 1001.540791] RDX: 00007fd5c2be74b9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 1001.548082] RBP: 00007fd5c2c45154 R08: 0000000000000000 R09: 0000000000000000 [ 1001.555410] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 1001.562691] R13: 00007fd5c2c41148 R14: 00007fd5c2c43150 R15: 00007fd5c2c784c8 [ 1001.570023] [ 1001.570023] Showing all locks held in the system: [ 1001.576379] 1 lock held by khungtaskd/1533: [ 1001.580737] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1001.589824] 2 locks held by syz-executor100/7987: [ 1001.594694] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 1001.603153] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 1001.613176] [ 1001.614787] ============================================= [ 1001.614787] [ 1001.621775] NMI backtrace for cpu 0 [ 1001.625433] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.272-syzkaller #0 [ 1001.632861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.642190] Call Trace: [ 1001.644755] dump_stack+0x1b2/0x281 [ 1001.648358] nmi_cpu_backtrace.cold+0x57/0x93 [ 1001.652832] ? irq_force_complete_move+0x350/0x350 [ 1001.657739] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1001.662994] watchdog+0x5b9/0xb40 [ 1001.666428] ? hungtask_pm_notify+0x50/0x50 [ 1001.670729] kthread+0x30d/0x420 [ 1001.674070] ? kthread_create_on_node+0xd0/0xd0 [ 1001.678713] ret_from_fork+0x24/0x30 [ 1001.682478] Sending NMI from CPU 0 to CPUs 1: [ 1001.687288] NMI backtrace for cpu 1 [ 1001.687292] CPU: 1 PID: 8 Comm: rcu_preempt Not tainted 4.14.272-syzkaller #0 [ 1001.687297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.687300] task: ffff8880b5420200 task.stack: ffff8880b5428000 [ 1001.687302] RIP: 0010:lock_acquire+0x139/0x3f0 [ 1001.687310] RSP: 0018:ffff8880b542fb50 EFLAGS: 00000097 [ 1001.687315] RAX: 0000000000000001 RBX: ffff8880b5420200 RCX: 0000000000000000 [ 1001.687319] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b5420a84 [ 1001.687322] RBP: ffff8880ba52cb18 R08: 0000000000000001 R09: 0000000000000000 [ 1001.687326] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 1001.687330] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 1001.687334] FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 1001.687337] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1001.687340] CR2: 00007f07cb503000 CR3: 00000000a19fc000 CR4: 00000000003406e0 [ 1001.687344] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1001.687347] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1001.687349] Call Trace: [ 1001.687351] _raw_spin_lock_irqsave+0x8c/0xc0 [ 1001.687354] ? lock_timer_base+0x58/0x190 [ 1001.687356] lock_timer_base+0x58/0x190 [ 1001.687358] try_to_del_timer_sync+0x6a/0xe0 [ 1001.687361] ? detach_if_pending+0x430/0x430 [ 1001.687363] ? del_timer_sync+0x1a0/0x240 [ 1001.687366] del_timer_sync+0x17c/0x240 [ 1001.687368] schedule_timeout+0x4b7/0xe90 [ 1001.687371] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1001.687373] ? usleep_range+0x130/0x130 [ 1001.687376] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1001.687378] ? prepare_to_swait+0x115/0x2a0 [ 1001.687381] ? run_timer_softirq+0x5a0/0x5a0 [ 1001.687383] rcu_gp_kthread+0xc0a/0x1e60 [ 1001.687385] ? force_qs_rnp+0x4f0/0x4f0 [ 1001.687387] ? force_qs_rnp+0x4f0/0x4f0 [ 1001.687390] kthread+0x30d/0x420 [ 1001.687392] ? kthread_create_on_node+0xd0/0xd0 [ 1001.687394] ret_from_fork+0x24/0x30 [ 1001.687396] Code: 00 00 c7 83 84 08 00 00 01 00 00 00 0f 1f 44 00 00 65 8b 05 5a 4a c0 7e 83 f8 07 0f 87 02 02 00 00 89 c0 48 0f a3 05 2f 79 c7 08 <0f> 82 b5 01 00 00 4c 8b 4c 24 08 44 89 ea 6a 00 48 89 ef 6a 00 [ 1001.688045] Kernel panic - not syncing: hung_task: blocked tasks [ 1001.903187] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.272-syzkaller #0 [ 1001.910696] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.920028] Call Trace: [ 1001.922613] dump_stack+0x1b2/0x281 [ 1001.926244] panic+0x1f9/0x42d [ 1001.929418] ? add_taint.cold+0x16/0x16 [ 1001.933378] watchdog+0x5ca/0xb40 [ 1001.936812] ? hungtask_pm_notify+0x50/0x50 [ 1001.941113] kthread+0x30d/0x420 [ 1001.944456] ? kthread_create_on_node+0xd0/0xd0 [ 1001.949103] ret_from_fork+0x24/0x30 [ 1001.953071] Kernel Offset: disabled [ 1001.956708] Rebooting in 86400 seconds..