INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. syzkaller login: [ 623.506502] IPVS: ftp: loaded support on port[0] = 21 [ 623.516622] IPVS: ftp: loaded support on port[0] = 21 [ 623.521645] IPVS: ftp: loaded support on port[0] = 21 [ 623.525614] IPVS: ftp: loaded support on port[0] = 21 [ 623.528124] IPVS: ftp: loaded support on port[0] = 21 [ 623.543528] IPVS: ftp: loaded support on port[0] = 21 [ 623.543787] IPVS: ftp: loaded support on port[0] = 21 [ 623.550571] IPVS: ftp: loaded support on port[0] = 21 [ 623.664933] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.664933] )1{^fD.`*eB8H8O" or missing value [ 623.691126] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.691126] )1{^fD.`*eB8H8O" or missing value [ 623.713564] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.713564] )1{^fD.`*eB8H8O" or missing value [ 623.735309] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.735309] )1{^fD.`*eB8H8O" or missing value [ 623.757164] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.757164] )1{^fD.`*eB8H8O" or missing value [ 623.779010] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.779010] )1{^fD.`*eB8H8O" or missing value [ 623.800839] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.800839] )1{^fD.`*eB8H8O" or missing value [ 623.822656] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.822656] )1{^fD.`*eB8H8O" or missing value [ 623.844864] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.844864] )1{^fD.`*eB8H8O" or missing value [ 623.866578] EXT4-fs (sda1): Unrecognized mount option "辭m.2-[)3i~r$S%j? ƅ|1>[2 Hsno[n߲$;g Xm64"N=BMZH# [ 623.866578] )1{^fD.`*eB8H8O" or missing value [ 749.671033] INFO: rcu_sched detected stalls on CPUs/tasks: [ 749.676823] (detected by 1, t=125007 jiffies, g=5317, c=5316, q=46) [ 749.685584] All QSes seen, last rcu_sched kthread activity 125016 (4295416981-4295291965), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 749.697708] syzkaller106625 R running task 21976 4551 4549 0x00000008 [ 749.704968] Call Trace: [ 749.707539] [ 749.709736] sched_show_task.cold.87+0x27a/0x301 [ 749.714492] ? can_nice.part.76+0x20/0x20 [ 749.718681] ? vprintk_default+0x28/0x30 [ 749.722740] ? vprintk_func+0x81/0xe7 [ 749.726539] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 749.731290] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 749.736044] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 749.741089] ? find_next_bit+0x104/0x130 [ 749.745153] print_other_cpu_stall.cold.79+0x92f/0x9d2 [ 749.750425] ? print_usage_bug+0xc0/0xc0 [ 749.754577] ? print_cpu_stall_info+0xc40/0xc40 [ 749.759242] ? print_usage_bug+0xc0/0xc0 [ 749.763300] ? graph_lock+0x170/0x170 [ 749.767096] ? __lock_acquire+0x7f5/0x5130 [ 749.771331] ? graph_lock+0x170/0x170 [ 749.775209] ? __lock_is_held+0xb5/0x140 [ 749.779274] ? print_usage_bug+0xc0/0xc0 [ 749.783327] ? rcu_read_lock_sched_held+0x108/0x120 [ 749.788349] check_cpu_stall.isra.61+0x706/0xf50 [ 749.793118] ? print_other_cpu_stall+0x4a0/0x4a0 [ 749.797876] ? debug_check_no_locks_freed+0x310/0x310 [ 749.803064] ? __lock_acquire+0x7f5/0x5130 [ 749.807303] ? debug_check_no_locks_freed+0x310/0x310 [ 749.812493] ? debug_check_no_locks_freed+0x310/0x310 [ 749.817753] ? ___ratelimit.cold.2+0x6a/0x6a [ 749.822162] ? graph_lock+0x170/0x170 [ 749.825956] ? __lock_is_held+0xb5/0x140 [ 749.830018] ? graph_lock+0x170/0x170 [ 749.833816] ? graph_lock+0x170/0x170 [ 749.837624] ? __lock_is_held+0xb5/0x140 [ 749.841690] rcu_check_callbacks+0x21b/0xad0 [ 749.846101] ? rcu_cpu_stall_reset+0x210/0x210 [ 749.850683] ? trace_hardirqs_off+0xd/0x10 [ 749.854916] ? raise_softirq+0x1b2/0x450 [ 749.858975] ? raise_softirq_irqoff+0x310/0x310 [ 749.863640] ? pvclock_read_flags+0x160/0x160 [ 749.868130] ? account_guest_time+0x3d0/0x3d0 [ 749.872619] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 749.878149] ? hrtimer_run_queues+0x70/0x300 [ 749.882554] ? run_local_timers+0x168/0x1d0 [ 749.886870] ? timer_clear_idle+0x50/0x50 [ 749.891013] ? account_system_time+0x7f/0xb0 [ 749.895415] ? account_process_tick+0x76/0x240 [ 749.899994] update_process_times+0x2d/0x70 [ 749.904311] tick_sched_handle+0x9f/0x180 [ 749.908453] tick_sched_timer+0x45/0x130 [ 749.912514] __hrtimer_run_queues+0x3e3/0x10a0 [ 749.917094] ? tick_sched_do_timer+0x1a0/0x1a0 [ 749.921673] ? hrtimer_start_range_ns+0xd10/0xd10 [ 749.926518] ? pvclock_read_flags+0x160/0x160 [ 749.931011] ? kvm_clock_read+0x25/0x30 [ 749.934988] ? kvm_clock_read+0x25/0x30 [ 749.938956] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 749.943969] ? ktime_get_update_offsets_now+0x3a6/0x570 [ 749.949329] ? do_timer+0x50/0x50 [ 749.952784] ? rcu_nmi_exit+0xd7/0x2b0 [ 749.956670] ? do_raw_spin_lock+0xc1/0x200 [ 749.960905] hrtimer_interrupt+0x286/0x650 [ 749.965166] smp_apic_timer_interrupt+0x15d/0x710 [ 749.970004] ? smp_call_function_single_interrupt+0x650/0x650 [ 749.975882] ? _raw_spin_lock+0x32/0x40 [ 749.979852] ? _raw_spin_unlock+0x22/0x30 [ 749.983999] ? handle_edge_irq+0x330/0x870 [ 749.988234] ? task_prio+0x50/0x50 [ 749.991775] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 749.996622] apic_timer_interrupt+0xf/0x20 [ 750.000843] [ 750.003077] RIP: 0010:select_collect+0x175/0x5f0 [ 750.007832] RSP: 0018:ffff8801c79e78e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 750.015534] RAX: ffff8801d95765c0 RBX: 1ffff10038f3cf20 RCX: ffffffff81c1ff94 [ 750.022794] RDX: 0000000000000000 RSI: ffffffff81c20025 RDI: ffff8801c79e7c08 [ 750.030059] RBP: ffff8801c79e79c8 R08: ffff8801d95765c0 R09: ffffed0034ffdec8 [ 750.037409] R10: ffffed0034ffdec8 R11: ffff8801a7fef643 R12: ffff8801c79e7bf0 [ 750.044670] R13: ffff8801a7fef5c0 R14: ffff8801c79e7bf8 R15: ffff8801c79e79a0 [ 750.051944] ? select_collect+0xe4/0x5f0 [ 750.055999] ? select_collect+0x175/0x5f0 [ 750.060148] ? select_collect+0x175/0x5f0 [ 750.064303] ? d_shrink_del+0x3b0/0x3b0 [ 750.069665] ? kasan_check_write+0x14/0x20 [ 750.073900] ? do_raw_spin_lock+0xc1/0x200 [ 750.078136] d_walk+0x3c3/0xc80 [ 750.081420] ? d_shrink_del+0x3b0/0x3b0 [ 750.085398] ? dget_parent+0x680/0x680 [ 750.089282] ? shrink_dentry_list+0x5a8/0x7c0 [ 750.093777] ? is_subdir+0x480/0x480 [ 750.097486] ? shrink_dcache_parent+0x199/0x230 [ 750.102149] ? shrink_dcache_parent+0xc7/0x230 [ 750.106752] shrink_dcache_parent+0x179/0x230 [ 750.111247] ? path_has_submounts+0x1a0/0x1a0 [ 750.115742] ? down_write+0x87/0x120 [ 750.119449] ? vfs_rmdir+0xe0/0x470 [ 750.123069] ? down_read+0x1b0/0x1b0 [ 750.126781] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 750.132312] ? security_inode_rmdir+0xf4/0x130 [ 750.136896] vfs_rmdir+0x202/0x470 [ 750.140433] do_rmdir+0x523/0x610 [ 750.143889] ? SyS_mkdir+0x30/0x30 [ 750.147429] ? exit_to_usermode_loop+0x87/0x310 [ 750.152102] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 750.157632] ? exit_to_usermode_loop+0x1ef/0x310 [ 750.162387] ? do_syscall_64+0xb7/0x9d0 [ 750.166355] ? do_rmdir+0x610/0x610 [ 750.169976] SyS_rmdir+0x1a/0x20 [ 750.173342] do_syscall_64+0x29e/0x9d0 [ 750.177221] ? vmalloc_sync_all+0x30/0x30 [ 750.181365] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 750.186115] ? syscall_return_slowpath+0x5c0/0x5c0 [ 750.191039] ? syscall_return_slowpath+0x30f/0x5c0 [ 750.195967] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 750.201423] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 750.206271] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 750.211454] RIP: 0033:0x4423c7 [ 750.214634] RSP: 002b:00007ffe66511a38 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 750.222339] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004423c7 [ 750.229601] RDX: 0000000000000000 RSI: 00000000006d45f8 RDI: 00007ffe66513250 [ 750.236860] RBP: 00007ffe66513250 R08: 0000000000000000 R09: 0000000000000001 [ 750.244122] R10: 000000000000000a R11: 0000000000000207 R12: 0000000001a048a0 [ 750.251381] R13: 0000000000000000 R14: 000000000009880b R15: 00007ffe66512c48 [ 750.258665] rcu_sched kthread starved for 125589 jiffies! g5317 c5316 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 [ 750.269046] RCU grace-period kthread stack dump: [ 750.273788] rcu_sched R running task 23896 9 2 0x80000000 [ 750.281069] Call Trace: [ 750.283653] __schedule+0x801/0x1e30 [ 750.287367] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 750.292380] ? __sched_text_start+0x8/0x8 [ 750.296519] ? _cond_resched+0x14/0x30 [ 750.300399] ? rcu_gp_init+0x83f/0x1060 [ 750.304374] ? add_timer_on+0xa50/0xa50 [ 750.308339] ? find_held_lock+0x36/0x1c0 [ 750.312401] ? lock_downgrade+0x8e0/0x8e0 [ 750.316554] ? rcu_accelerate_cbs+0x195/0xa60 [ 750.321049] schedule+0xef/0x430 [ 750.324408] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 750.328988] ? __schedule+0x1e30/0x1e30 [ 750.332962] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 750.337972] ? trace_hardirqs_on+0xd/0x10 [ 750.342118] ? prepare_to_swait+0x191/0x4f0 [ 750.346434] ? __lockdep_init_map+0x105/0x590 [ 750.350924] ? lockdep_init_map+0x9/0x10 [ 750.354978] ? init_timer_on_stack_key+0xb7/0xe0 [ 750.359751] schedule_timeout+0x138/0x240 [ 750.363895] ? usleep_range+0x180/0x180 [ 750.367864] ? __next_timer_interrupt+0x1a0/0x1a0 [ 750.372713] rcu_gp_kthread+0x6b5/0x1940 [ 750.376786] ? rcu_batches_completed_sched+0x10/0x10 [ 750.381885] ? sched_domains_numa_masks_set+0x121/0x230 [ 750.387246] ? pick_next_task_fair+0x973/0x1660 [ 750.391910] ? graph_lock+0x170/0x170 [ 750.395705] ? resched_curr+0x122/0x190 [ 750.399682] ? sched_domains_numa_masks_set+0x120/0x230 [ 750.405046] ? lock_downgrade+0x8e0/0x8e0 [ 750.409189] ? finish_task_switch+0x182/0x810 [ 750.413683] ? kasan_check_read+0x11/0x20 [ 750.417826] ? do_raw_spin_unlock+0x9e/0x2e0 [ 750.422230] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 750.426808] ? compat_start_thread+0x80/0x80 [ 750.431209] ? _raw_spin_unlock_irq+0x27/0x70 [ 750.435702] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 750.440714] ? kasan_check_write+0x14/0x20 [ 750.444944] ? finish_task_switch+0x28b/0x810 [ 750.449437] ? copy_overflow+0x20/0x20 [ 750.453320] ? lock_repin_lock+0x410/0x410 [ 750.457560] ? __schedule+0x809/0x1e30 [ 750.461452] ? graph_lock+0x170/0x170 [ 750.465244] ? find_held_lock+0x36/0x1c0 [ 750.469308] ? find_held_lock+0x36/0x1c0 [ 750.473376] ? __schedule+0x1e30/0x1e30 [ 750.477347] ? do_raw_spin_unlock+0x9e/0x2e0 [ 750.481760] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 750.486343] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 750.491357] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 750.496887] ? __kthread_parkme+0x1b7/0x280 [ 750.501204] kthread+0x345/0x410 [ 750.504568] ? rcu_batches_completed_sched+0x10/0x10 [ 750.509663] ? kthread_bind+0x40/0x40 [ 750.513461] ret_from_fork+0x3a/0x50