Warning: Permanently added '10.128.0.82' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.272603][ T1172] INFO: task syz-executor095:6874 blocked for more than 143 seconds. [ 616.280845][ T1172] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.288338][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.297137][ T1172] task:syz-executor095 state:D stack:28104 pid: 6874 ppid: 6868 flags:0x00004000 [ 616.306503][ T1172] Call Trace: [ 616.309858][ T1172] __schedule+0xea9/0x2230 [ 616.314366][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.319676][ T1172] ? lockdep_hardirqs_on+0x53/0x100 [ 616.324964][ T1172] schedule+0xd0/0x2a0 [ 616.329036][ T1172] schedule_timeout+0x1d8/0x250 [ 616.333944][ T1172] ? usleep_range+0x170/0x170 [ 616.338630][ T1172] ? lock_downgrade+0x830/0x830 [ 616.343582][ T1172] ? do_raw_spin_lock+0x120/0x2b0 [ 616.348613][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.353866][ T1172] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.359875][ T1172] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.365179][ T1172] wait_for_completion+0x163/0x260 [ 616.370300][ T1172] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.376877][ T1172] ? apparmor_capable+0x1d8/0x460 [ 616.381909][ T1172] ? security_capable+0x8f/0xc0 [ 616.386854][ T1172] io_uring_setup+0x1495/0x29a0 [ 616.391717][ T1172] ? io_sq_thread+0xe00/0xe00 [ 616.396478][ T1172] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.401335][ T1172] ? io_wake_function+0x2e0/0x2e0 [ 616.406479][ T1172] ? check_preemption_disabled+0x50/0x130 [ 616.412205][ T1172] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.418251][ T1172] ? lockdep_hardirqs_on+0x53/0x100 [ 616.423633][ T1172] do_syscall_64+0x2d/0x70 [ 616.428061][ T1172] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.434022][ T1172] RIP: 0033:0x440229 [ 616.437936][ T1172] Code: Bad RIP value. [ 616.441988][ T1172] RSP: 002b:00007fff39b32988 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.450689][ T1172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 [ 616.458748][ T1172] RDX: 0000000000400ad0 RSI: 0000000020000340 RDI: 00000000000032f8 [ 616.466823][ T1172] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.474918][ T1172] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401a30 [ 616.482973][ T1172] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 616.490986][ T1172] INFO: task io_uring-sq:6875 blocked for more than 143 seconds. [ 616.498760][ T1172] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.505876][ T1172] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.514714][ T1172] task:io_uring-sq state:D stack:31200 pid: 6875 ppid: 2 flags:0x00004000 [ 616.524036][ T1172] Call Trace: [ 616.527343][ T1172] __schedule+0xea9/0x2230 [ 616.531760][ T1172] ? io_schedule_timeout+0x140/0x140 [ 616.537124][ T1172] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.543030][ T1172] schedule+0xd0/0x2a0 [ 616.547096][ T1172] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.552952][ T1172] schedule_preempt_disabled+0xf/0x20 [ 616.558338][ T1172] kthread+0x2ac/0x4a0 [ 616.562508][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.567642][ T1172] ret_from_fork+0x1f/0x30 [ 616.572082][ T1172] [ 616.572082][ T1172] Showing all locks held in the system: [ 616.579926][ T1172] 1 lock held by khungtaskd/1172: [ 616.585035][ T1172] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.594965][ T1172] 1 lock held by in:imklog/6571: [ 616.599892][ T1172] #0: ffff8880a1510370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.609136][ T1172] [ 616.611458][ T1172] ============================================= [ 616.611458][ T1172] [ 616.619917][ T1172] NMI backtrace for cpu 0 [ 616.624330][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.633769][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.643806][ T1172] Call Trace: [ 616.647083][ T1172] dump_stack+0x198/0x1fd [ 616.651451][ T1172] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.656645][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.662277][ T1172] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.668370][ T1172] watchdog+0xd89/0xf30 [ 616.672518][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.678224][ T1172] kthread+0x3b5/0x4a0 [ 616.682280][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 616.687396][ T1172] ret_from_fork+0x1f/0x30 [ 616.691976][ T1172] Sending NMI from CPU 0 to CPUs 1: [ 616.697608][ C1] NMI backtrace for cpu 1 [ 616.697616][ C1] CPU: 1 PID: 3907 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.697623][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.697628][ C1] RIP: 0010:check_preemption_disabled+0x2/0x130 [ 616.697640][ C1] Code: 00 00 8b 1d 08 6e c3 02 31 ff 89 de 0f 1f 44 00 00 85 db 75 ae 0f 1f 44 00 00 41 bc 01 00 00 00 e8 c3 90 a1 fb eb 9f cc 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 35 [ 616.697644][ C1] RSP: 0018:ffffc900052f7d78 EFLAGS: 00000086 [ 616.697654][ C1] RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffffffff130b121 [ 616.697659][ C1] RDX: 0000000000000001 RSI: ffffffff88946720 RDI: ffffffff88946760 [ 616.697665][ C1] RBP: ffff888092f2ed88 R08: 0000000000000000 R09: ffffffff8abcb60f [ 616.697671][ C1] R10: fffffbfff15796c1 R11: 0000000000000000 R12: 0000000000000001 [ 616.697676][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 616.697683][ C1] FS: 00007fdd07fc48c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.697688][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.697693][ C1] CR2: 00007fdd05367000 CR3: 000000009378b000 CR4: 00000000001506e0 [ 616.697699][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.697705][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.697708][ C1] Call Trace: [ 616.697713][ C1] rcu_lockdep_current_cpu_online+0x31/0x110 [ 616.697717][ C1] ? rcu_is_watching+0x11/0xb0 [ 616.697721][ C1] rcu_read_lock_sched_held+0x25/0xb0 [ 616.697725][ C1] lock_acquire+0x82a/0xae0 [ 616.697729][ C1] ? do_sys_openat2+0xa1/0x420 [ 616.697734][ C1] ? lock_release+0x8f0/0x8f0 [ 616.697738][ C1] ? build_open_flags+0x650/0x650 [ 616.697742][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.697747][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.697751][ C1] ? _raw_spin_lock_irq+0xa4/0xd0 [ 616.697755][ C1] ? lockdep_hardirqs_off+0x96/0xd0 [ 616.697760][ C1] _raw_spin_lock_irq+0x94/0xd0 [ 616.697764][ C1] ? task_work_run+0xb4/0x190 [ 616.697768][ C1] task_work_run+0xb4/0x190 [ 616.697772][ C1] exit_to_user_mode_prepare+0x1e1/0x200 [ 616.697777][ C1] syscall_exit_to_user_mode+0x7e/0x2e0 [ 616.697781][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.697785][ C1] RIP: 0033:0x7fdd07554840 [ 616.697797][ C1] 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 [ 616.697801][ C1] RSP: 002b:00007fff7e7f4298 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 616.697811][ C1] RAX: fffffffffffffffe RBX: 00007fff7e7f45a0 RCX: 00007fdd07554840 [ 616.697817][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000563019227830 [ 616.697822][ C1] RBP: 000000000000000d R08: 000000000000c0ff R09: 00000000ffffffff [ 616.697828][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 616.697834][ C1] R13: 000056301921a040 R14: 00007fff7e7f4560 R15: 0000563019227880 [ 616.698270][ T1172] Kernel panic - not syncing: hung_task: blocked tasks [ 617.003795][ T1172] CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.013228][ T1172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.023309][ T1172] Call Trace: [ 617.026591][ T1172] dump_stack+0x198/0x1fd [ 617.030919][ T1172] panic+0x347/0x7c0 [ 617.034803][ T1172] ? __warn_printk+0xf3/0xf3 [ 617.039389][ T1172] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.045026][ T1172] ? preempt_schedule_thunk+0x16/0x18 [ 617.050408][ T1172] ? watchdog.cold+0x22d/0x24b [ 617.055175][ T1172] ? watchdog+0xc59/0xf30 [ 617.059490][ T1172] watchdog.cold+0x23e/0x24b [ 617.064083][ T1172] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.069823][ T1172] kthread+0x3b5/0x4a0 [ 617.073881][ T1172] ? __kthread_bind_mask+0xc0/0xc0 [ 617.078981][ T1172] ret_from_fork+0x1f/0x30 [ 617.084483][ T1172] Kernel Offset: disabled [ 617.088822][ T1172] Rebooting in 86400 seconds..