Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 636.806154][ T1172] INFO: task syz-executor365:6847 blocked for more than 143 seconds. [ 636.814404][ T1172] Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 636.823545][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.832936][ T1172] task:syz-executor365 state:D stack:28104 pid: 6847 ppid: 6841 flags:0x00004000 [ 636.842904][ T1172] Call Trace: [ 636.846955][ T1172] __schedule+0xea9/0x2230 [ 636.851416][ T1172] ? io_schedule_timeout+0x140/0x140 [ 636.857705][ T1172] schedule+0xd0/0x2a0 [ 636.861790][ T1172] schedule_timeout+0x1d8/0x250 [ 636.867596][ T1172] ? usleep_range+0x170/0x170 [ 636.872378][ T1172] ? lock_downgrade+0x830/0x830 [ 636.878282][ T1172] ? do_raw_spin_lock+0x120/0x2b0 [ 636.883342][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.889629][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.895661][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.901868][ T1172] wait_for_completion+0x163/0x260 [ 636.907590][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.913598][ T1172] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 636.921301][ T1172] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 636.927906][ T1172] ? __kthread_bind_mask+0xa1/0xc0 [ 636.933582][ T1172] io_uring_setup+0x1495/0x29a0 [ 636.939546][ T1172] ? io_connect+0x510/0x510 [ 636.944069][ T1172] ? io_sq_thread+0xe00/0xe00 [ 636.949792][ T1172] ? io_wake_function+0x2e0/0x2e0 [ 636.954849][ T1172] ? check_preemption_disabled+0x50/0x130 [ 636.961401][ T1172] ? syscall_enter_from_user_mode+0x20/0x290 [ 636.968111][ T1172] ? lockdep_hardirqs_on+0x53/0x100 [ 636.973488][ T1172] do_syscall_64+0x2d/0x70 [ 636.978841][ T1172] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.984833][ T1172] RIP: 0033:0x440299 [ 636.989639][ T1172] Code: Bad RIP value. [ 636.993714][ T1172] RSP: 002b:00007ffd48e813f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 637.003092][ T1172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 637.011980][ T1172] RDX: 0000000000400b40 RSI: 0000000020000200 RDI: 00000000000016bd [ 637.020567][ T1172] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 637.029183][ T1172] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 637.037909][ T1172] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 637.046606][ T1172] INFO: task io_uring-sq:6848 blocked for more than 143 seconds. [ 637.054434][ T1172] Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 637.062382][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.071684][ T1172] task:io_uring-sq state:D stack:31200 pid: 6848 ppid: 2 flags:0x00004000 [ 637.081610][ T1172] Call Trace: [ 637.084930][ T1172] __schedule+0xea9/0x2230 [ 637.090225][ T1172] ? io_schedule_timeout+0x140/0x140 [ 637.095580][ T1172] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 637.102223][ T1172] schedule+0xd0/0x2a0 [ 637.106788][ T1172] ? __do_sys_io_uring_enter+0x1b00/0x1b00 [ 637.112620][ T1172] schedule_preempt_disabled+0xf/0x20 [ 637.118846][ T1172] kthread+0x2ac/0x4a0 [ 637.122945][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 637.129775][ T1172] ret_from_fork+0x1f/0x30 [ 637.134325][ T1172] [ 637.134325][ T1172] Showing all locks held in the system: [ 637.143072][ T1172] 1 lock held by khungtaskd/1172: [ 637.148786][ T1172] #0: ffffffff89c67980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.159707][ T1172] 1 lock held by in:imklog/6539: [ 637.164908][ T1172] #0: ffff8880a6d2d0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.177228][ T1172] [ 637.179571][ T1172] ============================================= [ 637.179571][ T1172] [ 637.189844][ T1172] NMI backtrace for cpu 0 [ 637.194416][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 637.203860][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.213939][ T1172] Call Trace: [ 637.217343][ T1172] dump_stack+0x198/0x1fd [ 637.221840][ T1172] nmi_cpu_backtrace.cold+0x44/0xd7 [ 637.227119][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.232759][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.238827][ T1172] watchdog+0xd89/0xf30 [ 637.243000][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 637.248725][ T1172] kthread+0x3b5/0x4a0 [ 637.252807][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 637.257927][ T1172] ret_from_fork+0x1f/0x30 [ 637.262529][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 637.268702][ C1] NMI backtrace for cpu 1 [ 637.268711][ C1] CPU: 1 PID: 3903 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 637.268718][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.268723][ C1] RIP: 0010:__orc_find+0x6f/0xf0 [ 637.268735][ C1] Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01 [ 637.268739][ C1] RSP: 0018:ffffc90001177970 EFLAGS: 00000a06 [ 637.268749][ C1] RAX: 1ffffffff15a1a00 RBX: ffffffff8ad0d000 RCX: ffffffff81b4ecc9 [ 637.268755][ C1] RDX: 0000000000000000 RSI: ffffffff8b319cba RDI: ffffffff8ad0d000 [ 637.268761][ C1] RBP: ffffffff8ad0d000 R08: ffffffff8b319cc0 R09: ffffffff8b319cba [ 637.268767][ C1] R10: 000000000007201e R11: 00000000000298ef R12: ffffffff8ad0d000 [ 637.268773][ C1] R13: ffffffff8ad0d000 R14: ffffffff8ad0d000 R15: dffffc0000000000 [ 637.268779][ C1] FS: 00007fd4871e78c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 637.268785][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.268791][ C1] CR2: 00007fd8ce1976c0 CR3: 00000000936f7000 CR4: 00000000001506e0 [ 637.268797][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.268803][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.268807][ C1] Call Trace: [ 637.268811][ C1] ? arch_stack_walk+0x5e/0xf0 [ 637.268815][ C1] unwind_next_frame+0x342/0x1f90 [ 637.268820][ C1] ? kmem_cache_alloc+0x13a/0x3a0 [ 637.268824][ C1] ? deref_stack_reg+0x150/0x150 [ 637.268828][ C1] ? __unwind_start+0x517/0x800 [ 637.268833][ C1] ? profile_setup.cold+0xc1/0xc1 [ 637.268837][ C1] arch_stack_walk+0x81/0xf0 [ 637.268841][ C1] ? kmem_cache_alloc+0x13a/0x3a0 [ 637.268846][ C1] stack_trace_save+0x8c/0xc0 [ 637.268850][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 637.268855][ C1] ? __lock_acquire+0x161b/0x5570 [ 637.268859][ C1] kasan_save_stack+0x1b/0x40 [ 637.268863][ C1] ? kasan_save_stack+0x1b/0x40 [ 637.268868][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 637.268872][ C1] ? kmem_cache_alloc+0x13a/0x3a0 [ 637.268877][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.268881][ C1] ? get_max_files+0x10/0x10 [ 637.268886][ C1] ? kasan_save_stack+0x32/0x40 [ 637.268890][ C1] ? kasan_save_stack+0x1b/0x40 [ 637.268895][ C1] ? lock_acquire+0x1f3/0xae0 [ 637.268899][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.268904][ C1] ? find_held_lock+0x2d/0x110 [ 637.268908][ C1] ? fs_reclaim_release+0x90/0xd0 [ 637.268913][ C1] ? lock_downgrade+0x830/0x830 [ 637.268917][ C1] ? lockdep_hardirqs_on+0x53/0x100 [ 637.268922][ C1] ? lock_is_held_type+0xbb/0xf0 [ 637.268927][ C1] ? check_preemption_disabled+0x50/0x130 [ 637.268932][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 637.268937][ C1] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 637.268941][ C1] kmem_cache_alloc+0x13a/0x3a0 [ 637.268945][ C1] prepare_creds+0x3b/0x730 [ 637.268950][ C1] do_faccessat+0x3d7/0x820 [ 637.268954][ C1] ? stream_open+0x60/0x60 [ 637.268959][ C1] ? __secure_computing+0x104/0x360 [ 637.268963][ C1] do_syscall_64+0x2d/0x70 [ 637.268968][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.268973][ C1] RIP: 0033:0x7fd4864a39c7 [ 637.268986][ C1] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 637.268990][ C1] RSP: 002b:00007ffded948fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 637.269001][ C1] RAX: ffffffffffffffda RBX: 00007ffded94c000 RCX: 00007fd4864a39c7 [ 637.269008][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055cd1d11a9a3 [ 637.269014][ C1] RBP: 00007ffded949120 R08: 000055cd1d1103e5 R09: 0000000000000018 [ 637.269020][ C1] R10: 00007fd486761b78 R11: 0000000000000246 R12: 0000000000000000 [ 637.269026][ C1] R13: 0000000000000000 R14: 000055cd1d9de8a0 R15: 00007ffded949610 [ 637.269047][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 637.668141][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200902-syzkaller #0 [ 637.677671][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.687820][ T1172] Call Trace: [ 637.691104][ T1172] dump_stack+0x198/0x1fd [ 637.695488][ T1172] panic+0x347/0x7c0 [ 637.699397][ T1172] ? __warn_printk+0xf3/0xf3 [ 637.703983][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.709620][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 637.714999][ T1172] ? watchdog.cold+0x22d/0x24b [ 637.719775][ T1172] ? watchdog+0xc59/0xf30 [ 637.724117][ T1172] watchdog.cold+0x23e/0x24b [ 637.728748][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 637.735270][ T1172] kthread+0x3b5/0x4a0 [ 637.739348][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 637.744457][ T1172] ret_from_fork+0x1f/0x30 [ 637.750052][ T1172] Kernel Offset: disabled [ 637.754405][ T1172] Rebooting in 86400 seconds..