Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 657.270178][ T1165] INFO: task syz-executor113:9225 blocked for more than 143 seconds. [ 657.278438][ T1165] Not tainted 5.8.0-next-20200812-syzkaller #0 [ 657.286708][ T1165] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.295580][ T1165] syz-executor113 D28360 9225 6830 0x80000000 [ 657.302070][ T1165] Call Trace: [ 657.305423][ T1165] __schedule+0x8e5/0x21e0 [ 657.309825][ T1165] ? io_schedule_timeout+0x140/0x140 [ 657.315262][ T1165] ? io_wq_cancel_all+0x5a0/0x5a0 [ 657.320419][ T1165] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.325617][ T1165] schedule+0xd0/0x2a0 [ 657.329676][ T1165] io_uring_flush+0x740/0xa90 [ 657.334476][ T1165] ? mm_update_next_owner+0x100/0x7a0 [ 657.339859][ T1165] ? io_req_task_cancel+0x20/0x20 [ 657.345071][ T1165] ? add_wait_queue_exclusive+0x180/0x180 [ 657.350899][ T1165] ? find_held_lock+0x2d/0x110 [ 657.355656][ T1165] ? lock_is_held_type+0xbb/0xf0 [ 657.360688][ T1165] ? io_req_task_cancel+0x20/0x20 [ 657.365763][ T1165] filp_close+0xb4/0x170 [ 657.370807][ T1165] put_files_struct+0x1cc/0x350 [ 657.375675][ T1165] exit_files+0x7e/0xa0 [ 657.379826][ T1165] do_exit+0xb43/0x29f0 [ 657.385440][ T1165] ? mm_update_next_owner+0x7a0/0x7a0 [ 657.391285][ T1165] ? lock_is_held_type+0xbb/0xf0 [ 657.396237][ T1165] do_group_exit+0x125/0x310 [ 657.401542][ T1165] __x64_sys_exit_group+0x3a/0x50 [ 657.406604][ T1165] do_syscall_64+0x2d/0x70 [ 657.411812][ T1165] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.417717][ T1165] RIP: 0033:0x440938 [ 657.422333][ T1165] Code: Bad RIP value. [ 657.426407][ T1165] RSP: 002b:00007ffe99d95358 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 657.435627][ T1165] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440938 [ 657.444169][ T1165] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 657.452706][ T1165] RBP: 00000000004c01d0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 657.461233][ T1165] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 657.469210][ T1165] R13: 00000000006d21a0 R14: 0000000000000000 R15: 0000000000000000 [ 657.478038][ T1165] [ 657.478038][ T1165] Showing all locks held in the system: [ 657.486262][ T1165] 1 lock held by khungtaskd/1165: [ 657.491789][ T1165] #0: ffffffff89c66c40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.502186][ T1165] 1 lock held by in:imklog/6533: [ 657.507130][ T1165] #0: ffff8880a6503bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.517100][ T1165] 4 locks held by kworker/1:1/6848: [ 657.522807][ T1165] #0: ffff8880ae735e18 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x77f/0xe30 [ 657.532487][ T1165] #1: ffffffff89c66c40 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x3e0 [ 657.542860][ T1165] #2: ffff8880ae726698 (&base->lock){..-.}-{2:2}, at: lock_timer_base+0x55/0x1a0 [ 657.552645][ T1165] #3: ffffffff8cd18710 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 [ 657.563615][ T1165] [ 657.565952][ T1165] ============================================= [ 657.565952][ T1165] [ 657.575398][ T1165] NMI backtrace for cpu 0 [ 657.579718][ T1165] CPU: 0 PID: 1165 Comm: khungtaskd Not tainted 5.8.0-next-20200812-syzkaller #0 [ 657.588795][ T1165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.598840][ T1165] Call Trace: [ 657.602186][ T1165] dump_stack+0x18f/0x20d [ 657.606549][ T1165] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.611797][ T1165] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.617427][ T1165] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.623456][ T1165] watchdog+0xd89/0xf30 [ 657.627619][ T1165] ? trace_sched_process_hang+0x2e0/0x2e0 [ 657.633367][ T1165] kthread+0x3b5/0x4a0 [ 657.637425][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 657.642514][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 657.647679][ T1165] ret_from_fork+0x1f/0x30 [ 657.652313][ T1165] Sending NMI from CPU 0 to CPUs 1: [ 657.658154][ C1] NMI backtrace for cpu 1 [ 657.658162][ C1] CPU: 1 PID: 3895 Comm: systemd-journal Not tainted 5.8.0-next-20200812-syzkaller #0 [ 657.658169][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.658174][ C1] RIP: 0010:check_memory_region+0xde/0x180 [ 657.658185][ C1] Code: 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 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c [ 657.658189][ C1] RSP: 0018:ffffc90005637b00 EFLAGS: 00000046 [ 657.658199][ C1] RAX: fffffbfff18d173c RBX: fffffbfff18d173d RCX: ffffffff815a0170 [ 657.658205][ C1] RDX: fffffbfff18d173d RSI: 0000000000000008 RDI: ffffffff8c68b9e0 [ 657.658210][ C1] RBP: fffffbfff18d173c R08: 0000000000000000 R09: ffffffff8c68b9e7 [ 657.658216][ C1] R10: fffffbfff18d173c R11: 0000000000000000 R12: 0000000000000000 [ 657.658222][ C1] R13: 0000000000000002 R14: ffff88809322e240 R15: 0000000000000000 [ 657.658228][ C1] FS: 00007fd2476908c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 657.658233][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.658238][ C1] CR2: 00007fd244a2e000 CR3: 00000000930f5000 CR4: 00000000001506e0 [ 657.658244][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.658250][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.658253][ C1] Call Trace: [ 657.658257][ C1] __lock_acquire+0x480/0x5640 [ 657.658261][ C1] ? lock_acquire+0x1f1/0xad0 [ 657.658266][ C1] ? debug_object_activate+0x12e/0x3e0 [ 657.658270][ C1] ? find_held_lock+0x2d/0x110 [ 657.658274][ C1] ? debug_object_activate+0x287/0x3e0 [ 657.658279][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.658283][ C1] ? lock_downgrade+0x830/0x830 [ 657.658287][ C1] lock_acquire+0x1f1/0xad0 [ 657.658291][ C1] ? debug_object_active_state+0x10b/0x350 [ 657.658295][ C1] ? lock_release+0x8e0/0x8e0 [ 657.658300][ C1] ? debug_object_activate+0x287/0x3e0 [ 657.658304][ C1] ? debug_object_assert_init+0x2e0/0x2e0 [ 657.658309][ C1] ? lock_downgrade+0x830/0x830 [ 657.658313][ C1] _raw_spin_lock_irqsave+0x8c/0xc0 [ 657.658318][ C1] ? debug_object_active_state+0x10b/0x350 [ 657.658322][ C1] debug_object_active_state+0x10b/0x350 [ 657.658327][ C1] ? check_preemption_disabled+0x50/0x130 [ 657.658331][ C1] ? debug_object_destroy+0x210/0x210 [ 657.658335][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.658340][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 657.658344][ C1] ? get_max_files+0x10/0x10 [ 657.658348][ C1] call_rcu+0x44/0x7e0 [ 657.658352][ C1] task_work_run+0xdd/0x190 [ 657.658356][ C1] exit_to_user_mode_prepare+0x195/0x1c0 [ 657.658361][ C1] syscall_exit_to_user_mode+0x59/0x2b0 [ 657.658366][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.658370][ C1] RIP: 0033:0x7fd246c20840 [ 657.658381][ 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 [ 657.658385][ C1] RSP: 002b:00007ffe257d5e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 657.658395][ C1] RAX: fffffffffffffffe RBX: 00007ffe257d6190 RCX: 00007fd246c20840 [ 657.658401][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005605eca8b7c0 [ 657.658406][ C1] RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff [ 657.658412][ C1] R10: 0000000000000040 R11: 0000000000000246 R12: 00000000ffffffff [ 657.658418][ C1] R13: 00005605eca87040 R14: 00007ffe257d6150 R15: 00005605eca946b0 [ 657.658672][ T1165] Kernel panic - not syncing: hung_task: blocked tasks [ 658.010392][ T1165] CPU: 0 PID: 1165 Comm: khungtaskd Not tainted 5.8.0-next-20200812-syzkaller #0 [ 658.019495][ T1165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.029539][ T1165] Call Trace: [ 658.032836][ T1165] dump_stack+0x18f/0x20d [ 658.037199][ T1165] panic+0x2e3/0x75c [ 658.041161][ T1165] ? __warn_printk+0xf3/0xf3 [ 658.045785][ T1165] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.051452][ T1165] ? preempt_schedule_thunk+0x16/0x18 [ 658.056816][ T1165] ? watchdog.cold+0x22d/0x24b [ 658.061565][ T1165] ? watchdog+0xc59/0xf30 [ 658.065912][ T1165] watchdog.cold+0x23e/0x24b [ 658.070503][ T1165] ? trace_sched_process_hang+0x2e0/0x2e0 [ 658.076226][ T1165] kthread+0x3b5/0x4a0 [ 658.080280][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 658.085382][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 658.090479][ T1165] ret_from_fork+0x1f/0x30 [ 658.096220][ T1165] Kernel Offset: disabled [ 658.100555][ T1165] Rebooting in 86400 seconds..