[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.884991] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.100195] random: sshd: uninitialized urandom read (32 bytes read) [ 23.400844] random: sshd: uninitialized urandom read (32 bytes read) [ 24.183705] random: sshd: uninitialized urandom read (32 bytes read) [ 547.474382] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 552.940441] random: sshd: uninitialized urandom read (32 bytes read) [ 553.058799] IPVS: ftp: loaded support on port[0] = 21 [ 553.059497] IPVS: ftp: loaded support on port[0] = 21 [ 553.068864] IPVS: ftp: loaded support on port[0] = 21 [ 553.072646] IPVS: ftp: loaded support on port[0] = 21 [ 553.077513] IPVS: ftp: loaded support on port[0] = 21 [ 553.084695] IPVS: ftp: loaded support on port[0] = 21 [ 553.088640] IPVS: ftp: loaded support on port[0] = 21 [ 553.094257] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 553.279695] EXT4-fs (sda1): re-mounted. Opts: [ 553.284881] EXT4-fs (sda1): re-mounted. Opts: [ 553.289819] EXT4-fs (sda1): re-mounted. Opts: [ 553.294792] EXT4-fs (sda1): re-mounted. Opts: [ 553.299602] EXT4-fs (sda1): re-mounted. Opts: [ 553.304423] EXT4-fs (sda1): re-mounted. Opts: [ 553.309130] EXT4-fs (sda1): re-mounted. Opts: [ 553.313947] EXT4-fs (sda1): re-mounted. Opts: [ 553.319772] EXT4-fs (sda1): re-mounted. Opts: [ 553.324733] EXT4-fs (sda1): re-mounted. Opts: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 558.282776] EXT4-fs: 1815 callbacks suppressed [ 558.282784] EXT4-fs (sda1): re-mounted. Opts: [ 558.292868] EXT4-fs (sda1): re-mounted. Opts: [ 558.298245] EXT4-fs (sda1): re-mounted. Opts: [ 558.303329] EXT4-fs (sda1): re-mounted. Opts: [ 558.308191] EXT4-fs (sda1): re-mounted. Opts: [ 558.313186] EXT4-fs (sda1): re-mounted. Opts: [ 558.318112] EXT4-fs (sda1): re-mounted. Opts: [ 558.323173] EXT4-fs (sda1): re-mounted. Opts: [ 558.327951] EXT4-fs (sda1): re-mounted. Opts: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 558.332894] EXT4-fs (sda1): re-mounted. Opts: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 683.936021] INFO: rcu_sched detected stalls on CPUs/tasks: [ 683.941719] (detected by 0, t=125007 jiffies, g=7343, c=7342, q=45) [ 683.948224] All QSes seen, last rcu_sched kthread activity 125014 (4295351245-4295226231), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 683.960348] syz-executor546 R running task 20712 4521 4513 0x00000008 [ 683.967647] Call Trace: [ 683.970228] [ 683.972484] sched_show_task.cold.86+0x27a/0x301 [ 683.977260] ? can_nice.part.76+0x20/0x20 [ 683.981428] ? vprintk_default+0x28/0x30 [ 683.985487] ? vprintk_func+0x81/0xe7 [ 683.989286] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 683.994035] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 683.998858] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 684.003939] ? find_next_bit+0x104/0x130 [ 684.008056] print_other_cpu_stall.cold.79+0x92f/0x9d2 [ 684.013333] ? print_usage_bug+0xc0/0xc0 [ 684.017449] ? kasan_check_write+0x14/0x20 [ 684.021689] ? do_raw_spin_lock+0xc1/0x200 [ 684.025929] ? print_cpu_stall_info+0xc40/0xc40 [ 684.030594] ? print_usage_bug+0xc0/0xc0 [ 684.034655] ? graph_lock+0x170/0x170 [ 684.038457] ? __lock_acquire+0x7f5/0x5140 [ 684.042690] ? graph_lock+0x170/0x170 [ 684.046489] ? graph_lock+0x170/0x170 [ 684.050282] ? __lock_is_held+0xb5/0x140 [ 684.054347] ? print_usage_bug+0xc0/0xc0 [ 684.058404] ? rcu_read_lock_sched_held+0x108/0x120 [ 684.063430] check_cpu_stall.isra.61+0x706/0xf50 [ 684.068190] ? print_other_cpu_stall+0x4a0/0x4a0 [ 684.072952] ? debug_check_no_locks_freed+0x310/0x310 [ 684.078140] ? __lock_acquire+0x7f5/0x5140 [ 684.082379] ? debug_check_no_locks_freed+0x310/0x310 [ 684.087569] ? debug_check_no_locks_freed+0x310/0x310 [ 684.092848] ? ___ratelimit.cold.2+0x6a/0x6a [ 684.097254] ? graph_lock+0x170/0x170 [ 684.101047] ? __lock_is_held+0xb5/0x140 [ 684.105114] ? graph_lock+0x170/0x170 [ 684.108909] ? graph_lock+0x170/0x170 [ 684.112716] ? __lock_is_held+0xb5/0x140 [ 684.116788] rcu_check_callbacks+0x21b/0xad0 [ 684.121199] ? rcu_cpu_stall_reset+0x210/0x210 [ 684.125778] ? trace_hardirqs_off+0xd/0x10 [ 684.130059] ? raise_softirq+0x1b2/0x450 [ 684.134120] ? raise_softirq_irqoff+0x310/0x310 [ 684.138853] ? pvclock_read_flags+0x160/0x160 [ 684.143351] ? account_guest_time+0x3d0/0x3d0 [ 684.147848] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 684.153382] ? hrtimer_run_queues+0x70/0x390 [ 684.157793] ? run_local_timers+0x168/0x1d0 [ 684.162113] ? timer_clear_idle+0x50/0x50 [ 684.166257] ? account_system_time+0x7f/0xb0 [ 684.170665] ? account_process_tick+0x76/0x240 [ 684.175249] update_process_times+0x2d/0x70 [ 684.179607] tick_sched_handle+0x9f/0x180 [ 684.183765] tick_sched_timer+0x45/0x130 [ 684.187825] __hrtimer_run_queues+0x3e3/0x10a0 [ 684.192410] ? tick_sched_do_timer+0x1a0/0x1a0 [ 684.196994] ? hrtimer_start_range_ns+0xd10/0xd10 [ 684.201842] ? pvclock_read_flags+0x160/0x160 [ 684.206338] ? kvm_clock_read+0x25/0x30 [ 684.210324] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 684.215364] ? kvm_clock_read+0x25/0x30 [ 684.219342] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 684.224409] ? ktime_get_update_offsets_now+0x3d3/0x5c0 [ 684.229787] ? do_timer+0x50/0x50 [ 684.233238] ? rcu_nmi_exit+0xd7/0x2b0 [ 684.237127] ? do_raw_spin_lock+0xc1/0x200 [ 684.241366] hrtimer_interrupt+0x2f3/0x750 [ 684.245685] smp_apic_timer_interrupt+0x15d/0x710 [ 684.250530] ? smp_call_function_single_interrupt+0x650/0x650 [ 684.256414] ? _raw_spin_lock+0x32/0x40 [ 684.260389] ? _raw_spin_unlock+0x22/0x30 [ 684.264533] ? handle_edge_irq+0x330/0x870 [ 684.268765] ? task_prio+0x50/0x50 [ 684.272339] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 684.277188] apic_timer_interrupt+0xf/0x20 [ 684.281414] [ 684.283646] RIP: 0010:lock_acquire+0x257/0x520 [ 684.288215] RSP: 0018:ffff8801d91278d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 684.295919] RAX: dffffc0000000000 RBX: 1ffff1003b224f20 RCX: 0000000000000000 [ 684.303185] RDX: 1ffffffff11a30e5 RSI: ffff8801d063aa78 RDI: 0000000000000286 [ 684.310449] RBP: ffff8801d91279c8 R08: 0000000000004077 R09: 0000000000000003 [ 684.317712] R10: ffff8801d063aaf0 R11: ffff8801d063a240 R12: ffff8801d063a240 [ 684.325061] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 684.332352] ? lock_release+0xa10/0xa10 [ 684.336320] ? lock_release+0xa10/0xa10 [ 684.340291] ? kasan_check_read+0x11/0x20 [ 684.344436] ? mark_held_locks+0xc9/0x160 [ 684.348577] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 684.353843] ? d_walk+0x80f/0xc80 [ 684.357298] _raw_spin_lock+0x2a/0x40 [ 684.361096] ? d_walk+0x261/0xc80 [ 684.364547] d_walk+0x261/0xc80 [ 684.367827] ? d_shrink_del+0x3b0/0x3b0 [ 684.371802] ? dget_parent+0x680/0x680 [ 684.375685] ? shrink_dentry_list+0x3d/0x7c0 [ 684.380090] ? shrink_dentry_list+0x5a8/0x7c0 [ 684.384583] ? retint_kernel+0x10/0x10 [ 684.388472] ? is_subdir+0x480/0x480 [ 684.392182] ? d_shrink_del+0x3b0/0x3b0 [ 684.396153] ? d_walk+0x1/0xc80 [ 684.399435] shrink_dcache_parent+0x179/0x230 [ 684.403933] ? path_has_submounts+0x1a0/0x1a0 [ 684.408433] ? down_write+0x87/0x120 [ 684.412162] ? vfs_rmdir+0xe0/0x470 [ 684.415881] ? down_read+0x1b0/0x1b0 [ 684.419606] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 684.425234] ? security_inode_rmdir+0xf4/0x130 [ 684.429820] vfs_rmdir+0x202/0x470 [ 684.433359] do_rmdir+0x523/0x610 [ 684.437017] ? __ia32_sys_mkdir+0x80/0x80 [ 684.441168] ? exit_to_usermode_loop+0x87/0x310 [ 684.445840] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 684.451391] ? exit_to_usermode_loop+0x1ef/0x310 [ 684.456149] ? do_syscall_64+0x92/0x800 [ 684.460124] __x64_sys_rmdir+0x36/0x40 [ 684.464010] do_syscall_64+0x1b1/0x800 [ 684.467898] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 684.472740] ? syscall_return_slowpath+0x5c0/0x5c0 [ 684.477668] ? syscall_return_slowpath+0x30f/0x5c0 [ 684.482599] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 684.487966] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 684.492809] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 684.497991] RIP: 0033:0x441867 [ 684.501173] RSP: 002b:00007ffc48815c38 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 684.508882] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000441867 [ 684.516145] RDX: 0000000000000000 RSI: 00000000006cd858 RDI: 00007ffc48816d20 [ 684.523845] RBP: 00007ffc48816d20 R08: 0000000000000000 R09: 0000000000000001 [ 684.531107] R10: 0000000000000006 R11: 0000000000000207 R12: 000000000126c8a0 [ 684.538369] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 684.545668] rcu_sched kthread starved for 125611 jiffies! g7343 c7342 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 [ 684.556225] RCU grace-period kthread stack dump: [ 684.560968] rcu_sched R running task 23896 9 2 0x80000000 [ 684.568164] Call Trace: [ 684.570757] __schedule+0x801/0x1e30 [ 684.574472] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 684.579682] ? __sched_text_start+0x8/0x8 [ 684.583828] ? _cond_resched+0x14/0x30 [ 684.587715] ? rcu_gp_init+0x83f/0x1060 [ 684.591691] ? add_timer_on+0xa50/0xa50 [ 684.595659] ? find_held_lock+0x36/0x1c0 [ 684.599723] ? lock_downgrade+0x8e0/0x8e0 [ 684.603865] ? rcu_accelerate_cbs+0x195/0xa60 [ 684.608460] schedule+0xef/0x430 [ 684.611823] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 684.616404] ? __schedule+0x1e30/0x1e30 [ 684.620374] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 684.625387] ? trace_hardirqs_on+0xd/0x10 [ 684.629599] ? prepare_to_swait+0x19b/0x500 [ 684.633919] ? __lockdep_init_map+0x105/0x590 [ 684.638411] ? lockdep_init_map+0x9/0x10 [ 684.642471] ? init_timer_on_stack_key+0xb7/0xe0 [ 684.647239] schedule_timeout+0x138/0x240 [ 684.651387] ? usleep_range+0x180/0x180 [ 684.655359] ? __next_timer_interrupt+0x1a0/0x1a0 [ 684.660207] rcu_gp_kthread+0x6b5/0x1940 [ 684.664279] ? rcu_batches_completed_sched+0x10/0x10 [ 684.669378] ? trace_event_raw_event_lock+0x261/0x340 [ 684.674567] ? pick_next_task_fair+0x97c/0x1780 [ 684.679229] ? graph_lock+0x170/0x170 [ 684.683026] ? resched_curr+0x122/0x190 [ 684.687001] ? trace_event_raw_event_lock+0x260/0x340 [ 684.692198] ? lock_downgrade+0x8e0/0x8e0 [ 684.696344] ? finish_task_switch+0x182/0x840 [ 684.700843] ? kasan_check_read+0x11/0x20 [ 684.704986] ? do_raw_spin_unlock+0x9e/0x2e0 [ 684.709392] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 684.714047] ? compat_start_thread+0x80/0x80 [ 684.718452] ? _raw_spin_unlock_irq+0x27/0x70 [ 684.722942] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 684.727962] ? kasan_check_write+0x14/0x20 [ 684.732196] ? finish_task_switch+0x28b/0x840 [ 684.736696] ? preempt_notifier_register+0x1e0/0x1e0 [ 684.741797] ? lock_repin_lock+0x410/0x410 [ 684.746038] ? __schedule+0x809/0x1e30 [ 684.749933] ? graph_lock+0x170/0x170 [ 684.753737] ? find_held_lock+0x36/0x1c0 [ 684.757814] ? find_held_lock+0x36/0x1c0 [ 684.761896] ? __schedule+0x1e30/0x1e30 [ 684.765872] ? do_raw_spin_unlock+0x9e/0x2e0 [ 684.770363] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 684.774943] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 684.780536] ? parse_args.cold.15+0x1b3/0x1b3 [ 684.785033] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 684.790050] ? trace_hardirqs_on+0xd/0x10 [ 684.794204] kthread+0x345/0x410 [ 684.797569] ? rcu_batches_completed_sched+0x10/0x10 [ 684.802665] ? kthread_bind+0x40/0x40 [ 684.806468] ret_from_fork+0x3a/0x50