Warning: Permanently added '10.128.15.220' (ECDSA) to the list of known hosts. syzkaller login: [ 235.025828][ T1079] INFO: task kworker/u4:6:866 blocked for more than 143 seconds. [ 235.033695][ T1079] Not tainted 5.4.0-rc5-next-20191031 #0 [ 235.039907][ T1079] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 235.048634][ T1079] kworker/u4:6 D24344 866 2 0x80004000 [ 235.054987][ T1079] Workqueue: writeback wb_workfn (flush-8:0) [ 235.061022][ T1079] Call Trace: [ 235.064328][ T1079] __schedule+0x94a/0x1e70 [ 235.068811][ T1079] ? __sched_text_start+0x8/0x8 [ 235.073671][ T1079] ? blk_insert_cloned_request+0x530/0x530 [ 235.079536][ T1079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 235.085858][ T1079] ? kthread_data+0x58/0xc0 [ 235.090372][ T1079] schedule+0xdc/0x2b0 [ 235.094449][ T1079] io_schedule+0x1c/0x70 [ 235.098766][ T1079] __lock_page+0x422/0xab0 [ 235.103209][ T1079] ? wait_on_page_bit+0xa60/0xa60 [ 235.108296][ T1079] ? page_cache_next_miss+0x340/0x340 [ 235.113670][ T1079] ? ___might_sleep+0x163/0x2c0 [ 235.118569][ T1079] ? __might_sleep+0x95/0x190 [ 235.123257][ T1079] mpage_prepare_extent_to_map+0xb3f/0xf90 [ 235.129140][ T1079] ? mpage_process_page_bufs+0x780/0x780 [ 235.134775][ T1079] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 235.140386][ T1079] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 235.146426][ T1079] ? __kmalloc_node+0xf/0x70 [ 235.151039][ T1079] ext4_writepages+0x954/0x2e70 [ 235.155956][ T1079] ? ___might_sleep+0x163/0x2c0 [ 235.160839][ T1079] ? __might_sleep+0x40/0x190 [ 235.165518][ T1079] ? mark_lock+0xb1/0x1220 [ 235.170082][ T1079] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 235.175562][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.180652][ T1079] ? __lock_acquire+0x16f2/0x4a00 [ 235.185741][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.190765][ T1079] ? mark_lock+0xc2/0x1220 [ 235.195190][ T1079] ? mark_held_locks+0xf0/0xf0 [ 235.200706][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.205792][ T1079] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 235.211275][ T1079] do_writepages+0xfa/0x2a0 [ 235.215847][ T1079] ? do_writepages+0xfa/0x2a0 [ 235.220541][ T1079] ? page_writeback_cpu_online+0x20/0x20 [ 235.226241][ T1079] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 235.232417][ T1079] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 235.238022][ T1079] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 235.244072][ T1079] __writeback_single_inode+0x136/0x1400 [ 235.249804][ T1079] ? _raw_spin_unlock+0x28/0x40 [ 235.254673][ T1079] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 235.260972][ T1079] ? wbc_attach_and_unlock_inode+0x5bf/0x920 [ 235.267026][ T1079] writeback_sb_inodes+0x596/0xf20 [ 235.272163][ T1079] ? __writeback_single_inode+0x1400/0x1400 [ 235.278107][ T1079] ? trylock_super+0x22/0x110 [ 235.282794][ T1079] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 235.289094][ T1079] __writeback_inodes_wb+0xc3/0x260 [ 235.294331][ T1079] wb_writeback+0x910/0xd90 [ 235.298899][ T1079] ? mark_lock+0xc2/0x1220 [ 235.303332][ T1079] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 235.309713][ T1079] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 235.315580][ T1079] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 235.321365][ T1079] ? get_nr_dirty_inodes+0xe2/0x140 [ 235.326649][ T1079] wb_workfn+0xba5/0x1220 [ 235.331008][ T1079] ? inode_wait_for_writeback+0x40/0x40 [ 235.336615][ T1079] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 235.342792][ T1079] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 235.348902][ T1079] ? trace_hardirqs_on+0x67/0x240 [ 235.353938][ T1079] process_one_work+0x9af/0x1740 [ 235.358922][ T1079] ? pwq_dec_nr_in_flight+0x320/0x320 [ 235.364415][ T1079] ? lock_acquire+0x190/0x410 [ 235.369145][ T1079] worker_thread+0x98/0xe40 [ 235.373651][ T1079] ? trace_hardirqs_on+0x67/0x240 [ 235.378755][ T1079] kthread+0x361/0x430 [ 235.382833][ T1079] ? process_one_work+0x1740/0x1740 [ 235.388085][ T1079] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 235.393805][ T1079] ret_from_fork+0x24/0x30 [ 235.398280][ T1079] INFO: task khugepaged:1086 blocked for more than 143 seconds. [ 235.405944][ T1079] Not tainted 5.4.0-rc5-next-20191031 #0 [ 235.412090][ T1079] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 235.420790][ T1079] khugepaged D27568 1086 2 0x80004000 [ 235.427178][ T1079] Call Trace: [ 235.430463][ T1079] __schedule+0x94a/0x1e70 [ 235.434874][ T1079] ? __sched_text_start+0x8/0x8 [ 235.439761][ T1079] ? blk_insert_cloned_request+0x530/0x530 [ 235.445571][ T1079] ? _raw_spin_unlock_irq+0x23/0x80 [ 235.450869][ T1079] ? __lock_page+0x3d9/0xab0 [ 235.455472][ T1079] ? _raw_spin_unlock_irq+0x23/0x80 [ 235.460730][ T1079] schedule+0xdc/0x2b0 [ 235.464801][ T1079] io_schedule+0x1c/0x70 [ 235.469081][ T1079] __lock_page+0x422/0xab0 [ 235.473504][ T1079] ? wait_on_page_bit+0xa60/0xa60 [ 235.478572][ T1079] ? page_cache_next_miss+0x340/0x340 [ 235.483947][ T1079] ? ___might_sleep+0x163/0x2c0 [ 235.488833][ T1079] ? __might_sleep+0x95/0x190 [ 235.493536][ T1079] mpage_prepare_extent_to_map+0xb3f/0xf90 [ 235.499406][ T1079] ? mpage_process_page_bufs+0x780/0x780 [ 235.505042][ T1079] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 235.511085][ T1079] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 235.517370][ T1079] ext4_writepages+0xb6a/0x2e70 [ 235.522240][ T1079] ? __this_cpu_preempt_check+0x2c/0x190 [ 235.527984][ T1079] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 235.533450][ T1079] ? 0xffffffff81000000 [ 235.537652][ T1079] ? mark_lock+0xc2/0x1220 [ 235.542078][ T1079] ? prep_new_page+0x19f/0x200 [ 235.546946][ T1079] ? wbc_attach_and_unlock_inode+0x515/0x920 [ 235.552933][ T1079] ? find_held_lock+0x35/0x130 [ 235.557760][ T1079] ? wbc_attach_and_unlock_inode+0x515/0x920 [ 235.563766][ T1079] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 235.569284][ T1079] do_writepages+0xfa/0x2a0 [ 235.573797][ T1079] ? do_writepages+0xfa/0x2a0 [ 235.578531][ T1079] ? lock_downgrade+0x920/0x920 [ 235.583399][ T1079] ? page_writeback_cpu_online+0x20/0x20 [ 235.589187][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.594220][ T1079] ? do_raw_spin_unlock+0x57/0x270 [ 235.599401][ T1079] ? _raw_spin_unlock+0x28/0x40 [ 235.604254][ T1079] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 235.610580][ T1079] ? wbc_attach_and_unlock_inode+0x5bf/0x920 [ 235.616607][ T1079] __filemap_fdatawrite_range+0x2bc/0x3b0 [ 235.622332][ T1079] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 235.628482][ T1079] ? lockdep_hardirqs_on+0x421/0x5e0 [ 235.633803][ T1079] filemap_flush+0x24/0x30 [ 235.638276][ T1079] collapse_file+0x36b1/0x41a0 [ 235.643048][ T1079] ? khugepaged+0x21c0/0x4360 [ 235.647777][ T1079] ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370 [ 235.655907][ T1079] ? rcu_preempt_deferred_qs_irqrestore+0x4ff/0xd60 [ 235.662509][ T1079] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 235.668378][ T1079] ? khugepaged_find_target_node+0x142/0x180 [ 235.674367][ T1079] khugepaged+0x2da9/0x4360 [ 235.678920][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.683950][ T1079] ? __lock_acquire+0x16f2/0x4a00 [ 235.689019][ T1079] ? _raw_spin_unlock_irq+0x23/0x80 [ 235.694223][ T1079] ? finish_task_switch+0x147/0x750 [ 235.699459][ T1079] ? _raw_spin_unlock_irq+0x23/0x80 [ 235.704664][ T1079] ? lockdep_hardirqs_on+0x421/0x5e0 [ 235.710011][ T1079] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 235.715880][ T1079] ? lock_downgrade+0x920/0x920 [ 235.720734][ T1079] ? finish_wait+0x260/0x260 [ 235.725423][ T1079] ? lockdep_hardirqs_on+0x421/0x5e0 [ 235.730792][ T1079] ? trace_hardirqs_on+0x67/0x240 [ 235.735861][ T1079] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 235.742095][ T1079] ? __kthread_parkme+0x108/0x1c0 [ 235.747353][ T1079] ? __kasan_check_read+0x11/0x20 [ 235.752486][ T1079] kthread+0x361/0x430 [ 235.756605][ T1079] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 235.762245][ T1079] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 235.768032][ T1079] ret_from_fork+0x24/0x30 [ 235.772544][ T1079] [ 235.772544][ T1079] Showing all locks held in the system: [ 235.780313][ T1079] 4 locks held by kworker/u4:6/866: [ 235.785514][ T1079] #0: ffff8880a82d5528 ((wq_completion)writeback){+.+.}, at: process_one_work+0x88b/0x1740 [ 235.795644][ T1079] #1: ffff8880a7d9fdc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x8c1/0x1740 [ 235.807045][ T1079] #2: ffff88809ac720d8 (&type->s_umount_key#32){++++}, at: trylock_super+0x22/0x110 [ 235.816580][ T1079] #3: ffff88809ac74990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 [ 235.826440][ T1079] 1 lock held by khungtaskd/1079: [ 235.831556][ T1079] #0: ffffffff88faba40 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 235.840932][ T1079] 1 lock held by khugepaged/1086: [ 235.845987][ T1079] #0: ffff88809ac74990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 [ 235.856013][ T1079] 1 lock held by rsyslogd/8625: [ 235.860854][ T1079] #0: ffff888094fbc0e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 235.869505][ T1079] 2 locks held by getty/8715: [ 235.874181][ T1079] #0: ffff888095de9090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.883175][ T1079] #1: ffffc90005f152e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 235.892782][ T1079] 2 locks held by getty/8716: [ 235.897496][ T1079] #0: ffff888099496090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.906538][ T1079] #1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 235.916146][ T1079] 2 locks held by getty/8717: [ 235.920819][ T1079] #0: ffff8880a5336090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.929846][ T1079] #1: ffffc90005f3b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 235.939473][ T1079] 2 locks held by getty/8718: [ 235.944133][ T1079] #0: ffff8880a7bab090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.953124][ T1079] #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 235.962747][ T1079] 2 locks held by getty/8719: [ 235.967502][ T1079] #0: ffff8880a3da5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.976495][ T1079] #1: ffffc90005f372e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 235.986082][ T1079] 2 locks held by getty/8720: [ 235.990754][ T1079] #0: ffff8880980d6090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 235.999853][ T1079] #1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 236.009451][ T1079] 2 locks held by getty/8721: [ 236.014112][ T1079] #0: ffff88809f289090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 236.023100][ T1079] #1: ffffc90005f092e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 236.032730][ T1079] 1 lock held by syz-execprog/8743: [ 236.037966][ T1079] #0: ffff8880908243a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 [ 236.047234][ T1079] [ 236.049648][ T1079] ============================================= [ 236.049648][ T1079] [ 236.058118][ T1079] NMI backtrace for cpu 0 [ 236.063340][ T1079] CPU: 0 PID: 1079 Comm: khungtaskd Not tainted 5.4.0-rc5-next-20191031 #0 [ 236.071916][ T1079] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.082616][ T1079] Call Trace: [ 236.085913][ T1079] dump_stack+0x172/0x1f0 [ 236.090248][ T1079] nmi_cpu_backtrace.cold+0x70/0xb2 [ 236.095438][ T1079] ? vprintk_func+0x86/0x189 [ 236.100040][ T1079] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 236.105677][ T1079] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 236.111659][ T1079] arch_trigger_cpumask_backtrace+0x14/0x20 [ 236.117536][ T1079] watchdog+0xc8f/0x1350 [ 236.121787][ T1079] kthread+0x361/0x430 [ 236.125846][ T1079] ? reset_hung_task_detector+0x30/0x30 [ 236.131385][ T1079] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 236.137092][ T1079] ret_from_fork+0x24/0x30 [ 236.141609][ T1079] Sending NMI from CPU 0 to CPUs 1: [ 236.147085][ C1] NMI backtrace for cpu 1 [ 236.147090][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc5-next-20191031 #0 [ 236.147096][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.147100][ C1] RIP: 0010:lockdep_hardirqs_off+0x184/0x2e0 [ 236.147109][ C1] Code: 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 22 01 00 00 8b 83 4c 08 00 00 48 8d bb 64 08 00 00 48 89 fa 48 c1 ea 03 <44> 8d 60 01 48 b8 00 00 00 00 00 fc ff df 44 89 a3 4c 08 00 00 0f [ 236.147113][ C1] RSP: 0018:ffff8880a98cfd68 EFLAGS: 00000807 [ 236.147120][ C1] RAX: 00000000000acab5 RBX: ffff8880a98ba340 RCX: 0000000000000000 [ 236.147124][ C1] RDX: 1ffff11015317574 RSI: 0000000000000000 RDI: ffff8880a98baba4 [ 236.147128][ C1] RBP: ffff8880a98cfd80 R08: ffff8880a98ba340 R09: ffffed1015317469 [ 236.147133][ C1] R10: ffffed1015317468 R11: ffff8880a98ba347 R12: ffffffff81517bed [ 236.147137][ C1] R13: ffff8880a98ba340 R14: ffffffff81517bed R15: 0000000000000001 [ 236.147146][ C1] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 236.147150][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.147155][ C1] CR2: 000000000244b000 CR3: 00000000a3874000 CR4: 00000000001406e0 [ 236.147159][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 236.147164][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 236.147166][ C1] Call Trace: [ 236.147169][ C1] ? cpu_startup_entry+0x1b/0x20 [ 236.147172][ C1] trace_hardirqs_off+0x62/0x240 [ 236.147175][ C1] do_idle+0x11d/0x6e0 [ 236.147178][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 236.147182][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 236.147185][ C1] ? complete+0x61/0x80 [ 236.147188][ C1] cpu_startup_entry+0x1b/0x20 [ 236.147191][ C1] start_secondary+0x2f4/0x410 [ 236.147194][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 236.147198][ C1] secondary_startup_64+0xa4/0xb0 [ 236.147867][ T1079] Kernel panic - not syncing: hung_task: blocked tasks [ 236.339950][ T1079] CPU: 0 PID: 1079 Comm: khungtaskd Not tainted 5.4.0-rc5-next-20191031 #0 [ 236.348698][ T1079] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.358760][ T1079] Call Trace: [ 236.362048][ T1079] dump_stack+0x172/0x1f0 [ 236.366398][ T1079] panic+0x2e3/0x75c [ 236.370281][ T1079] ? add_taint.cold+0x16/0x16 [ 236.374949][ T1079] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 236.380648][ T1079] ? printk_safe_flush+0xf2/0x140 [ 236.385677][ T1079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 236.391918][ T1079] ? nmi_trigger_cpumask_backtrace+0x224/0x28b [ 236.398065][ T1079] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 236.404215][ T1079] watchdog+0xca0/0x1350 [ 236.408449][ T1079] kthread+0x361/0x430 [ 236.412506][ T1079] ? reset_hung_task_detector+0x30/0x30 [ 236.418041][ T1079] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 236.423843][ T1079] ret_from_fork+0x24/0x30 [ 236.429803][ T1079] Kernel Offset: disabled [ 236.434164][ T1079] Rebooting in 86400 seconds..