Warning: Permanently added '10.128.0.162' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.372843][ T1150] INFO: task syz-executor446:6822 blocked for more than 143 seconds. [ 616.381081][ T1150] Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 [ 616.389813][ T1150] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.398710][ T1150] syz-executor446 D27632 6822 6816 0x00004000 [ 616.405151][ T1150] Call Trace: [ 616.408535][ T1150] __schedule+0x8b4/0x1e80 [ 616.413271][ T1150] ? io_schedule_timeout+0x140/0x140 [ 616.418561][ T1150] ? lockdep_hardirqs_on+0x6a/0xe0 [ 616.423758][ T1150] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 616.429635][ T1150] ? prepare_to_wait+0x121/0x2a0 [ 616.434670][ T1150] schedule+0xd0/0x2a0 [ 616.438744][ T1150] bit_wait+0x12/0xa0 [ 616.442853][ T1150] __wait_on_bit+0x60/0x190 [ 616.447364][ T1150] ? out_of_line_wait_on_bit_lock+0x110/0x110 [ 616.453509][ T1150] out_of_line_wait_on_bit+0xd5/0x110 [ 616.458885][ T1150] ? __wait_on_bit+0x190/0x190 [ 616.463757][ T1150] ? var_wake_function+0x130/0x130 [ 616.468946][ T1150] wait_for_key_construction+0x10b/0x140 [ 616.474673][ T1150] request_key_tag+0x7a/0xb0 [ 616.479315][ T1150] dns_query+0x257/0x6c3 [ 616.483639][ T1150] ceph_parse_ips+0x77f/0x8c0 [ 616.488326][ T1150] ? ceph_con_opened+0x50/0x50 [ 616.493219][ T1150] ? lookup_constant+0xf0/0xf0 [ 616.498000][ T1150] ? __fs_parse+0x269/0x810 [ 616.502485][ T1150] ceph_parse_mon_ips+0x59/0xc0 [ 616.507416][ T1150] ceph_parse_mount_param+0x1239/0x17e0 [ 616.513066][ T1150] ? lock_is_held_type+0xb0/0xe0 [ 616.517994][ T1150] ? vfs_parse_fs_string+0xc0/0x150 [ 616.523334][ T1150] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 616.528882][ T1150] ? extra_mon_dispatch+0x130/0x130 [ 616.534168][ T1150] ? vfs_parse_fs_string+0xc0/0x150 [ 616.539384][ T1150] ? extra_mon_dispatch+0x130/0x130 [ 616.544635][ T1150] vfs_parse_fs_param+0x203/0x550 [ 616.549666][ T1150] vfs_parse_fs_string+0xe6/0x150 [ 616.554814][ T1150] ? vfs_parse_fs_param+0x550/0x550 [ 616.560019][ T1150] ? alloc_fs_context+0x56e/0x880 [ 616.565197][ T1150] do_mount+0x1222/0x1df0 [ 616.569547][ T1150] ? copy_mount_string+0x40/0x40 [ 616.574759][ T1150] ? __might_fault+0x190/0x1d0 [ 616.579581][ T1150] ? _copy_from_user+0x138/0x190 [ 616.584612][ T1150] ? memdup_user+0x7c/0xd0 [ 616.589053][ T1150] __x64_sys_mount+0x18f/0x230 [ 616.593946][ T1150] do_syscall_64+0x60/0xe0 [ 616.598375][ T1150] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.604326][ T1150] RIP: 0033:0x4401b9 [ 616.608233][ T1150] Code: Bad RIP value. [ 616.612279][ T1150] RSP: 002b:00007ffcf5f97f68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 616.620826][ T1150] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004401b9 [ 616.628868][ T1150] RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00000000200002c0 [ 616.636928][ T1150] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.644982][ T1150] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 616.653019][ T1150] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 616.661026][ T1150] [ 616.661026][ T1150] Showing all locks held in the system: [ 616.668804][ T1150] 1 lock held by khungtaskd/1150: [ 616.673896][ T1150] #0: ffffffff89bc3000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.683860][ T1150] [ 616.686181][ T1150] ============================================= [ 616.686181][ T1150] [ 616.694643][ T1150] NMI backtrace for cpu 1 [ 616.698976][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 [ 616.708401][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.718444][ T1150] Call Trace: [ 616.721775][ T1150] dump_stack+0x18f/0x20d [ 616.726090][ T1150] nmi_cpu_backtrace.cold+0x70/0xb1 [ 616.731344][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.736977][ T1150] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.742991][ T1150] watchdog+0xd89/0xf30 [ 616.747129][ T1150] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.752864][ T1150] kthread+0x3b5/0x4a0 [ 616.756914][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 616.762016][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 616.767147][ T1150] ret_from_fork+0x1f/0x30 [ 616.771653][ T1150] Sending NMI from CPU 1 to CPUs 0: [ 616.777485][ C0] NMI backtrace for cpu 0 [ 616.777493][ C0] CPU: 0 PID: 3872 Comm: systemd-journal Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 [ 616.777500][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.777504][ C0] RIP: 0010:ep_item_poll+0x18f/0x3e0 [ 616.777515][ C0] Code: 04 02 84 c0 74 08 3c 03 0f 8e ce 01 00 00 44 23 63 70 e8 d4 e8 a1 ff 48 b8 00 00 00 00 00 fc ff df 49 c7 44 05 00 00 00 00 00 <48> 8b 44 24 68 65 48 2b 04 25 28 00 00 00 0f 85 dc 01 00 00 48 83 [ 616.777520][ C0] RSP: 0018:ffffc90001577b00 EFLAGS: 00000293 [ 616.777528][ C0] RAX: dffffc0000000000 RBX: ffff888094b7ec00 RCX: 0000000000000006 [ 616.777534][ C0] RDX: ffff88809371e240 RSI: ffffffff81d2029c RDI: ffffffff815cf492 [ 616.777539][ C0] RBP: ffffc90001577c30 R08: 0000000000000000 R09: 0000000000000000 [ 616.777545][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 [ 616.777550][ C0] R13: 1ffff920002aef62 R14: ffff888094b7ec70 R15: ffffffff815cf360 [ 616.777556][ C0] FS: 00007f577ad1e8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 616.777561][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.777566][ C0] CR2: 00007f57780bd000 CR3: 0000000093aca000 CR4: 00000000001506f0 [ 616.777572][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.777577][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.777580][ C0] Call Trace: [ 616.777584][ C0] ? ep_eventpoll_poll+0x160/0x160 [ 616.777588][ C0] ? lock_is_held_type+0xb0/0xe0 [ 616.777592][ C0] ep_send_events_proc+0x272/0xc50 [ 616.777596][ C0] ? do_epoll_create+0x1c0/0x1c0 [ 616.777600][ C0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 616.777604][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 616.777608][ C0] ? do_epoll_create+0x1c0/0x1c0 [ 616.777612][ C0] ep_scan_ready_list+0x28f/0x880 [ 616.777616][ C0] ? ep_destroy_wakeup_source+0x150/0x150 [ 616.777621][ C0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 616.777624][ C0] do_epoll_wait+0xac4/0x1190 [ 616.777628][ C0] ? seccomp_notify_ioctl+0xd90/0xd90 [ 616.777632][ C0] ? ep_poll_callback+0xfc0/0xfc0 [ 616.777636][ C0] ? lock_acquire+0x1f1/0xad0 [ 616.777640][ C0] ? pid_task+0x120/0x120 [ 616.777643][ C0] ? find_held_lock+0x2d/0x110 [ 616.777647][ C0] ? __task_pid_nr_ns+0x1b7/0x490 [ 616.777651][ C0] ? __secure_computing+0x104/0x360 [ 616.777669][ C0] ? syscall_trace_enter+0x14a/0x340 [ 616.777673][ C0] __x64_sys_epoll_wait+0x93/0xf0 [ 616.777677][ C0] do_syscall_64+0x60/0xe0 [ 616.777681][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.777685][ C0] RIP: 0033:0x7f5779fe82e3 [ 616.777689][ C0] Code: Bad RIP value. [ 616.777693][ C0] RSP: 002b:00007fffb50ab0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 [ 616.777702][ C0] RAX: ffffffffffffffda RBX: 0000555bedae41e0 RCX: 00007f5779fe82e3 [ 616.777708][ C0] RDX: 0000000000000013 RSI: 00007fffb50ab0d0 RDI: 0000000000000008 [ 616.777713][ C0] RBP: 00007fffb50ab2c0 R08: 0000555bedae60b0 R09: 00007fffb510c080 [ 616.777718][ C0] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffb50ab0d0 [ 616.777724][ C0] R13: 0000000000000001 R14: ffffffffffffffff R15: 0005a989a2695dae [ 616.777910][ T1150] Kernel panic - not syncing: hung_task: blocked tasks [ 617.090167][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200701-syzkaller #0 [ 617.099604][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.109632][ T1150] Call Trace: [ 617.112923][ T1150] dump_stack+0x18f/0x20d [ 617.117284][ T1150] panic+0x2e3/0x75c [ 617.121162][ T1150] ? __warn_printk+0xf3/0xf3 [ 617.125733][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.131353][ T1150] ? preempt_schedule_thunk+0x16/0x18 [ 617.136704][ T1150] ? watchdog.cold+0x22d/0x24b [ 617.141453][ T1150] ? watchdog+0xc59/0xf30 [ 617.145765][ T1150] watchdog.cold+0x23e/0x24b [ 617.150336][ T1150] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.156653][ T1150] kthread+0x3b5/0x4a0 [ 617.160715][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 617.165859][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 617.170959][ T1150] ret_from_fork+0x1f/0x30 [ 617.176487][ T1150] Kernel Offset: disabled [ 617.180806][ T1150] Rebooting in 86400 seconds..