Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.246229][ T1172] INFO: task syz-executor753:6844 blocked for more than 143 seconds. [ 616.254446][ T1172] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.261907][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.271242][ T1172] task:syz-executor753 state:D stack:28104 pid: 6844 ppid: 6838 flags:0x00004000 [ 616.280574][ T1172] Call Trace: [ 616.283945][ T1172] __schedule+0xea9/0x2230 [ 616.288441][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.293754][ T1172] schedule+0xd0/0x2a0 [ 616.297893][ T1172] schedule_timeout+0x1d8/0x250 [ 616.302840][ T1172] ? usleep_range+0x170/0x170 [ 616.307592][ T1172] ? lock_downgrade+0x830/0x830 [ 616.312465][ T1172] ? do_raw_spin_lock+0x120/0x2b0 [ 616.317645][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.322854][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.328903][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.334112][ T1172] wait_for_completion+0x163/0x260 [ 616.339310][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.345303][ T1172] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.352064][ T1172] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 616.357939][ T1172] ? __kthread_bind_mask+0xa1/0xc0 [ 616.363065][ T1172] io_uring_setup+0x1495/0x29a0 [ 616.367991][ T1172] ? io_sq_thread+0xe00/0xe00 [ 616.372676][ T1172] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.377624][ T1172] ? io_wake_function+0x2e0/0x2e0 [ 616.382683][ T1172] ? check_preemption_disabled+0x50/0x130 [ 616.388477][ T1172] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.394507][ T1172] ? lockdep_hardirqs_on+0x53/0x100 [ 616.400757][ T1172] do_syscall_64+0x2d/0x70 [ 616.405169][ T1172] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.411130][ T1172] RIP: 0033:0x440299 [ 616.415020][ T1172] Code: Bad RIP value. [ 616.419146][ T1172] RSP: 002b:00007ffd3306db88 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.427642][ T1172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 616.435613][ T1172] RDX: 0000000000400b40 RSI: 0000000020000180 RDI: 00000000000043a4 [ 616.443688][ T1172] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.451744][ T1172] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 616.459801][ T1172] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 616.467893][ T1172] INFO: task io_uring-sq:6845 blocked for more than 143 seconds. [ 616.475614][ T1172] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.482710][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.491564][ T1172] task:io_uring-sq state:D stack:31200 pid: 6845 ppid: 2 flags:0x00004000 [ 616.500845][ T1172] Call Trace: [ 616.504142][ T1172] __schedule+0xea9/0x2230 [ 616.508635][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.513959][ T1172] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.519823][ T1172] schedule+0xd0/0x2a0 [ 616.523917][ T1172] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.530800][ T1172] schedule_preempt_disabled+0xf/0x20 [ 616.536256][ T1172] kthread+0x2ac/0x4a0 [ 616.540351][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.545458][ T1172] ret_from_fork+0x1f/0x30 [ 616.549993][ T1172] [ 616.549993][ T1172] Showing all locks held in the system: [ 616.557947][ T1172] 1 lock held by khungtaskd/1172: [ 616.562974][ T1172] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.572918][ T1172] 2 locks held by in:imklog/6540: [ 616.578032][ T1172] #0: ffff888093a5d5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.587231][ T1172] #1: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: is_bpf_text_address+0x0/0x160 [ 616.597006][ T1172] [ 616.599334][ T1172] ============================================= [ 616.599334][ T1172] [ 616.607789][ T1172] NMI backtrace for cpu 0 [ 616.612119][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.621546][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.631592][ T1172] Call Trace: [ 616.634878][ T1172] dump_stack+0x198/0x1fd [ 616.639190][ T1172] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.644370][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.649997][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.655974][ T1172] watchdog+0xd89/0xf30 [ 616.660118][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.665815][ T1172] kthread+0x3b5/0x4a0 [ 616.669875][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.674965][ T1172] ret_from_fork+0x1f/0x30 [ 616.679517][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 616.685172][ C1] NMI backtrace for cpu 1 [ 616.685179][ C1] CPU: 1 PID: 3902 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.685186][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.685191][ C1] RIP: 0010:check_memory_region+0xc8/0x180 [ 616.685210][ C1] Code: 38 00 74 ed 48 8d 50 08 eb 09 48 83 c0 01 48 39 d0 74 7a 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 <48> 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 [ 616.685215][ C1] RSP: 0018:ffffc90004edfb30 EFLAGS: 00000083 [ 616.685225][ C1] RAX: fffff520009dbf6f RBX: fffff520009dbf70 RCX: ffffffff815b6760 [ 616.685230][ C1] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90004edfb78 [ 616.685236][ C1] RBP: fffff520009dbf6f R08: 0000000000000001 R09: ffffc90004edfb7b [ 616.685242][ C1] R10: fffff520009dbf6f R11: 0000000000000000 R12: ffffffff8cc33748 [ 616.685248][ C1] R13: ffffffff8cc33750 R14: dead000000000100 R15: dffffc0000000000 [ 616.685254][ C1] FS: 00007f5f9329b8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.685259][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.685265][ C1] CR2: 00007f5f9063f000 CR3: 000000009366c000 CR4: 00000000001506e0 [ 616.685271][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.685277][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.685280][ C1] Call Trace: [ 616.685284][ C1] do_raw_spin_lock+0x120/0x2b0 [ 616.685288][ C1] ? unlazy_walk+0x158/0x3a0 [ 616.685292][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 616.685297][ C1] ? lock_downgrade+0x830/0x830 [ 616.685301][ C1] _raw_spin_lock_irqsave+0x9c/0xce [ 616.685306][ C1] ? debug_check_no_obj_freed+0xc7/0x41c [ 616.685310][ C1] debug_check_no_obj_freed+0xc7/0x41c [ 616.685314][ C1] kmem_cache_free.part.0+0x151/0x1e0 [ 616.685318][ C1] putname+0xe1/0x120 [ 616.685322][ C1] filename_lookup+0x3b1/0x560 [ 616.685326][ C1] ? may_linkat+0x2b0/0x2b0 [ 616.685331][ C1] ? __check_object_size+0x171/0x3e4 [ 616.685335][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 616.685340][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.685344][ C1] ? security_prepare_creds+0xe6/0x190 [ 616.685348][ C1] do_faccessat+0x129/0x820 [ 616.685352][ C1] ? stream_open+0x60/0x60 [ 616.685357][ C1] ? __secure_computing+0x104/0x360 [ 616.685361][ C1] do_syscall_64+0x2d/0x70 [ 616.685365][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.685369][ C1] RIP: 0033:0x7f5f925579c7 [ 616.685381][ 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 [ 616.685385][ C1] RSP: 002b:00007ffe59574b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 616.685395][ C1] RAX: ffffffffffffffda RBX: 00007ffe59577a40 RCX: 00007f5f925579c7 [ 616.685401][ C1] RDX: 00007f5f92fc8a00 RSI: 0000000000000000 RDI: 000055e6f7df59a3 [ 616.685406][ C1] RBP: 00007ffe59574b60 R08: 0000000000000000 R09: 0000000000000000 [ 616.685412][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 616.685418][ C1] R13: 0000000000000000 R14: 00007ffe59577a40 R15: 00007ffe59575050 [ 616.686079][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 617.002302][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.011732][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.021774][ T1172] Call Trace: [ 617.025070][ T1172] dump_stack+0x198/0x1fd [ 617.029399][ T1172] panic+0x347/0x7c0 [ 617.033289][ T1172] ? __warn_printk+0xf3/0xf3 [ 617.037877][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.043487][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 617.048853][ T1172] ? watchdog.cold+0x22d/0x24b [ 617.053606][ T1172] ? watchdog+0xc59/0xf30 [ 617.057916][ T1172] watchdog.cold+0x23e/0x24b [ 617.062498][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.068208][ T1172] kthread+0x3b5/0x4a0 [ 617.072270][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 617.077361][ T1172] ret_from_fork+0x1f/0x30 [ 617.082998][ T1172] Kernel Offset: disabled [ 617.087321][ T1172] Rebooting in 86400 seconds..