Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 595.886652][ T1177] INFO: task syz-executor112:6872 blocked for more than 143 seconds. [ 595.886675][ T1177] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 595.886681][ T1177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.886687][ T1177] task:syz-executor112 state:D stack:28104 pid: 6872 ppid: 6866 flags:0x00004000 [ 595.925129][ T1177] Call Trace: [ 595.929537][ T1177] __schedule+0xea9/0x2230 [ 595.934550][ T1177] ? io_schedule_timeout+0x140/0x140 [ 595.940873][ T1177] schedule+0xd0/0x2a0 [ 595.945525][ T1177] schedule_timeout+0x1d8/0x250 [ 595.951529][ T1177] ? usleep_range+0x170/0x170 [ 595.956698][ T1177] ? lock_downgrade+0x830/0x830 [ 595.962568][ T1177] ? do_raw_spin_lock+0x120/0x2b0 [ 595.969086][ T1177] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.974812][ T1177] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 595.981465][ T1177] ? _raw_spin_unlock_irq+0x1f/0x80 [ 595.987733][ T1177] wait_for_completion+0x163/0x260 [ 595.993479][ T1177] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 596.000331][ T1177] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 596.009055][ T1177] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 596.015848][ T1177] ? __kthread_bind_mask+0xa1/0xc0 [ 596.021367][ T1177] io_uring_setup+0x1495/0x29a0 [ 596.026275][ T1177] ? io_sq_thread+0xe00/0xe00 [ 596.031500][ T1177] ? io_issue_sqe+0x5bb0/0x5bb0 [ 596.037127][ T1177] ? io_wake_function+0x2e0/0x2e0 [ 596.042404][ T1177] ? check_preemption_disabled+0x50/0x130 [ 596.050200][ T1177] ? syscall_enter_from_user_mode+0x20/0x290 [ 596.057634][ T1177] ? lockdep_hardirqs_on+0x53/0x100 [ 596.063373][ T1177] do_syscall_64+0x2d/0x70 [ 596.068905][ T1177] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.075463][ T1177] RIP: 0033:0x440299 [ 596.080323][ T1177] Code: Bad RIP value. [ 596.084816][ T1177] RSP: 002b:00007ffe61d919d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 596.094752][ T1177] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 596.103670][ T1177] RDX: 0000000000400b40 RSI: 0000000020000200 RDI: 00000000000016bd [ 596.112676][ T1177] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 596.122072][ T1177] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 596.130954][ T1177] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 596.139859][ T1177] INFO: task io_uring-sq:6873 blocked for more than 143 seconds. [ 596.148243][ T1177] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.156099][ T1177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 596.165667][ T1177] task:io_uring-sq state:D stack:31200 pid: 6873 ppid: 2 flags:0x00004000 [ 596.178528][ T1177] Call Trace: [ 596.182476][ T1177] __schedule+0xea9/0x2230 [ 596.187427][ T1177] ? io_schedule_timeout+0x140/0x140 [ 596.193113][ T1177] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 596.199616][ T1177] schedule+0xd0/0x2a0 [ 596.203969][ T1177] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 596.210197][ T1177] schedule_preempt_disabled+0xf/0x20 [ 596.216075][ T1177] kthread+0x2ac/0x4a0 [ 596.220578][ T1177] ? __kthread_bind_mask+0xc0/0xc0 [ 596.226383][ T1177] ret_from_fork+0x1f/0x30 [ 596.231599][ T1177] [ 596.231599][ T1177] Showing all locks held in the system: [ 596.240372][ T1177] 1 lock held by khungtaskd/1177: [ 596.246011][ T1177] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 596.257343][ T1177] [ 596.259702][ T1177] ============================================= [ 596.259702][ T1177] [ 596.269602][ T1177] NMI backtrace for cpu 1 [ 596.274330][ T1177] CPU: 1 PID: 1177 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.285274][ T1177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.295872][ T1177] Call Trace: [ 596.299409][ T1177] dump_stack+0x198/0x1fd [ 596.304548][ T1177] nmi_cpu_backtrace.cold+0x44/0xd7 [ 596.310434][ T1177] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.316415][ T1177] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 596.323349][ T1177] watchdog+0xd89/0xf30 [ 596.328641][ T1177] ? trace_sched_process_hang+0x2e0/0x2e0 [ 596.334685][ T1177] kthread+0x3b5/0x4a0 [ 596.339122][ T1177] ? __kthread_bind_mask+0xc0/0xc0 [ 596.344526][ T1177] ret_from_fork+0x1f/0x30 [ 596.349324][ T1177] Sending NMI from CPU 1 to CPUs 0: [ 596.355714][ C0] NMI backtrace for cpu 0 [ 596.355722][ C0] CPU: 0 PID: 3911 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.355729][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.355734][ C0] RIP: 0010:deref_stack_reg+0x5c/0x150 [ 596.355745][ C0] Code: 00 00 41 8b 04 24 85 c0 74 62 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c3 00 00 00 <49> 8d 7c 24 10 4d 8b 6c 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 [ 596.355750][ C0] RSP: 0018:ffffc900054d75c8 EFLAGS: 00000246 [ 596.355760][ C0] RAX: dffffc0000000000 RBX: ffffc900054d7718 RCX: ffffffff8b31a651 [ 596.355765][ C0] RDX: 1ffff92000a9aedb RSI: ffffc900054d7a40 RDI: ffffc900054d76d8 [ 596.355771][ C0] RBP: ffffc900054d7a40 R08: ffffffff8b31a64c R09: ffffffff8b31a650 [ 596.355777][ C0] R10: 000000000007201e R11: 0000000000000001 R12: ffffc900054d76d0 [ 596.355782][ C0] R13: ffffc900054d7705 R14: ffffc900054d7720 R15: ffffc900054d76d0 [ 596.355789][ C0] FS: 00007f53c08768c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 596.355794][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 596.355799][ C0] CR2: 00007f53bdc1b000 CR3: 0000000093344000 CR4: 00000000001506f0 [ 596.355805][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 596.355811][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 596.355814][ C0] Call Trace: [ 596.355818][ C0] unwind_next_frame+0xc3b/0x1f90 [ 596.355823][ C0] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 596.355827][ C0] ? deref_stack_reg+0x150/0x150 [ 596.355831][ C0] ? __unwind_start+0x517/0x800 [ 596.355836][ C0] ? profile_setup.cold+0xc1/0xc1 [ 596.355840][ C0] arch_stack_walk+0x81/0xf0 [ 596.355844][ C0] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 596.355848][ C0] stack_trace_save+0x8c/0xc0 [ 596.355853][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 596.355857][ C0] ? __lock_acquire+0x161b/0x5570 [ 596.355861][ C0] kasan_save_stack+0x1b/0x40 [ 596.355866][ C0] ? kasan_save_stack+0x1b/0x40 [ 596.355870][ C0] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 596.355875][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.355879][ C0] ? find_held_lock+0x2d/0x110 [ 596.355884][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.355888][ C0] ? lock_downgrade+0x830/0x830 [ 596.355892][ C0] ? lock_acquire+0x1f3/0xae0 [ 596.355896][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.355900][ C0] ? find_held_lock+0x2d/0x110 [ 596.355905][ C0] ? fs_reclaim_release+0x90/0xd0 [ 596.355909][ C0] ? lock_downgrade+0x830/0x830 [ 596.355913][ C0] ? unwind_get_return_address+0x51/0x90 [ 596.355918][ C0] ? profile_setup.cold+0xc1/0xc1 [ 596.355922][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.355927][ C0] ? check_preemption_disabled+0x50/0x130 [ 596.355931][ C0] ? kasan_unpoison_shadow+0x33/0x40 [ 596.355935][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 596.355940][ C0] kmem_cache_alloc+0x13a/0x3a0 [ 596.355944][ C0] __alloc_file+0x21/0x350 [ 596.355948][ C0] alloc_empty_file+0x6d/0x170 [ 596.355952][ C0] path_openat+0xe3/0x2730 [ 596.355956][ C0] ? __lock_acquire+0x161b/0x5570 [ 596.355960][ C0] ? path_lookupat+0x830/0x830 [ 596.355964][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.355969][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 596.355973][ C0] ? lock_is_held_type+0xbb/0xf0 [ 596.355977][ C0] do_filp_open+0x17e/0x3c0 [ 596.355981][ C0] ? may_open_dev+0xf0/0xf0 [ 596.355985][ C0] ? __alloc_fd+0x28d/0x600 [ 596.355989][ C0] ? lock_downgrade+0x830/0x830 [ 596.355993][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 596.355997][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 596.356001][ C0] ? _raw_spin_unlock+0x24/0x40 [ 596.356005][ C0] ? __alloc_fd+0x28d/0x600 [ 596.356009][ C0] do_sys_openat2+0x16d/0x420 [ 596.356014][ C0] ? seccomp_notify_ioctl+0xd90/0xd90 [ 596.356018][ C0] ? strncpy_from_user+0x2bf/0x3e0 [ 596.356023][ C0] ? build_open_flags+0x650/0x650 [ 596.356027][ C0] ? getname_flags.part.0+0x1dd/0x4f0 [ 596.356031][ C0] __x64_sys_open+0x119/0x1c0 [ 596.356035][ C0] ? do_sys_open+0x140/0x140 [ 596.356040][ C0] ? __secure_computing+0x104/0x360 [ 596.356044][ C0] do_syscall_64+0x2d/0x70 [ 596.356048][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 596.356052][ C0] RIP: 0033:0x7f53bfe06840 [ 596.356064][ C0] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 596.356068][ C0] RSP: 002b:00007fff98516288 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 596.356078][ C0] RAX: ffffffffffffffda RBX: 00007fff98516590 RCX: 00007f53bfe06840 [ 596.356084][ C0] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000555f7876c480 [ 596.356090][ C0] RBP: 000000000000000d R08: 00000000000001e0 R09: 00000000ffffffff [ 596.356095][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 596.356101][ C0] R13: 0000555f78761040 R14: 00007fff98516550 R15: 0000555f7876c4d0 [ 596.356108][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 596.357617][ T1177] Kernel panic - not syncing: hung_task: blocked tasks [ 596.892803][ T1177] CPU: 1 PID: 1177 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 596.902924][ T1177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 596.913568][ T1177] Call Trace: [ 596.916871][ T1177] dump_stack+0x198/0x1fd [ 596.921521][ T1177] panic+0x347/0x7c0 [ 596.925765][ T1177] ? __warn_printk+0xf3/0xf3 [ 596.930645][ T1177] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 596.936650][ T1177] ? preempt_schedule_thunk+0x16/0x18 [ 596.942460][ T1177] ? watchdog.cold+0x22d/0x24b [ 596.947284][ T1177] ? watchdog+0xc59/0xf30 [ 596.951964][ T1177] watchdog.cold+0x23e/0x24b [ 596.956945][ T1177] ? trace_sched_process_hang+0x2e0/0x2e0 [ 596.963017][ T1177] kthread+0x3b5/0x4a0 [ 596.967154][ T1177] ? __kthread_bind_mask+0xc0/0xc0 [ 596.972540][ T1177] ret_from_fork+0x1f/0x30 [ 596.980434][ T1177] Kernel Offset: disabled [ 596.984786][ T1177] Rebooting in 86400 seconds..