[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.300361][ T1170] INFO: task syz-executor757:6848 blocked for more than 143 seconds. [ 616.308574][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.317087][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.326786][ T1170] task:syz-executor757 state:D stack:28104 pid: 6848 ppid: 6842 flags:0x00004000 [ 616.336103][ T1170] Call Trace: [ 616.339524][ T1170] __schedule+0xea9/0x2230 [ 616.344231][ T1170] ? io_schedule_timeout+0x140/0x140 [ 616.349527][ T1170] ? lockdep_hardirqs_on+0x53/0x100 [ 616.354784][ T1170] schedule+0xd0/0x2a0 [ 616.358876][ T1170] schedule_timeout+0x1d8/0x250 [ 616.363785][ T1170] ? usleep_range+0x170/0x170 [ 616.368636][ T1170] ? lock_downgrade+0x830/0x830 [ 616.373532][ T1170] ? do_raw_spin_lock+0x120/0x2b0 [ 616.378561][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.383803][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.389781][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.395035][ T1170] wait_for_completion+0x163/0x260 [ 616.400212][ T1170] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.406806][ T1170] ? apparmor_capable+0x1d8/0x460 [ 616.411944][ T1170] ? security_capable+0x8f/0xc0 [ 616.416870][ T1170] io_uring_setup+0x1495/0x29a0 [ 616.421783][ T1170] ? io_sq_thread+0xe00/0xe00 [ 616.426461][ T1170] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.431346][ T1170] ? io_wake_function+0x2e0/0x2e0 [ 616.436386][ T1170] ? check_preemption_disabled+0x50/0x130 [ 616.442150][ T1170] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.448129][ T1170] ? lockdep_hardirqs_on+0x53/0x100 [ 616.454316][ T1170] do_syscall_64+0x2d/0x70 [ 616.458731][ T1170] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.464685][ T1170] RIP: 0033:0x440299 [ 616.468609][ T1170] Code: Bad RIP value. [ 616.472712][ T1170] RSP: 002b:00007fffb00ea0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.481188][ T1170] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 616.489167][ T1170] RDX: 0000000000400b40 RSI: 0000000020000080 RDI: 0000000000000deb [ 616.497169][ T1170] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.505188][ T1170] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 616.513203][ T1170] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 616.521298][ T1170] INFO: task io_uring-sq:6849 blocked for more than 143 seconds. [ 616.529014][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.536080][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.544988][ T1170] task:io_uring-sq state:D stack:31200 pid: 6849 ppid: 2 flags:0x00004000 [ 616.554417][ T1170] Call Trace: [ 616.557704][ T1170] __schedule+0xea9/0x2230 [ 616.562165][ T1170] ? io_schedule_timeout+0x140/0x140 [ 616.567469][ T1170] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.573328][ T1170] schedule+0xd0/0x2a0 [ 616.577411][ T1170] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.584139][ T1170] schedule_preempt_disabled+0xf/0x20 [ 616.589584][ T1170] kthread+0x2ac/0x4a0 [ 616.593698][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 616.598883][ T1170] ret_from_fork+0x1f/0x30 [ 616.603356][ T1170] [ 616.603356][ T1170] Showing all locks held in the system: [ 616.611138][ T1170] 1 lock held by khungtaskd/1170: [ 616.616147][ T1170] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.628054][ T1170] 1 lock held by in:imklog/6692: [ 616.633024][ T1170] #0: ffff8880938685f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.642244][ T1170] [ 616.644565][ T1170] ============================================= [ 616.644565][ T1170] [ 616.652998][ T1170] NMI backtrace for cpu 0 [ 616.657319][ T1170] CPU: 0 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.666757][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.676788][ T1170] Call Trace: [ 616.680142][ T1170] dump_stack+0x198/0x1fd [ 616.684468][ T1170] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.689677][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.695319][ T1170] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.701351][ T1170] watchdog+0xd89/0xf30 [ 616.705487][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.711185][ T1170] kthread+0x3b5/0x4a0 [ 616.715228][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 616.720337][ T1170] ret_from_fork+0x1f/0x30 [ 616.724848][ T1170] Sending NMI from CPU 0 to CPUs 1: [ 616.731077][ C1] NMI backtrace for cpu 1 [ 616.731083][ C1] CPU: 1 PID: 3914 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.731089][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.731099][ C1] RIP: 0010:rcu_read_lock_sched_held+0x2/0xb0 [ 616.731110][ C1] Code: c1 e8 09 48 83 f0 01 83 e0 01 c3 0f 0b 48 c7 c7 c0 3a b6 89 e8 1f 5b 54 00 eb d3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 54 <41> bc 01 00 00 00 e8 83 74 98 06 85 c0 75 06 44 89 e0 41 5c c3 e8 [ 616.731113][ C1] RSP: 0018:ffffc90007717830 EFLAGS: 00000246 [ 616.731120][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815a7a5e [ 616.731125][ C1] RDX: fffffbfff15796c2 RSI: 0000000000000008 RDI: ffffffff8abcb608 [ 616.731130][ C1] RBP: ffffffff89c67500 R08: 0000000000000000 R09: ffffffff8abcb60f [ 616.731135][ C1] R10: fffffbfff15796c1 R11: 0000000000000001 R12: 0000000000000002 [ 616.731140][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 616.731145][ C1] FS: 00007f5cdba678c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.731149][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.731154][ C1] CR2: 00007f5cd8e0b000 CR3: 0000000093a88000 CR4: 00000000001506e0 [ 616.731158][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.731163][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.731165][ C1] Call Trace: [ 616.731169][ C1] lock_acquire+0x82a/0xae0 [ 616.731172][ C1] ? lock_release+0x8f0/0x8f0 [ 616.731175][ C1] ? arch_stack_walk+0x5e/0xf0 [ 616.731178][ C1] ? unwind_next_frame+0xe3b/0x1f90 [ 616.731182][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.731185][ C1] is_bpf_text_address+0x36/0x160 [ 616.731189][ C1] ? __bpf_address_lookup+0x290/0x290 [ 616.731192][ C1] kernel_text_address+0xbd/0xf0 [ 616.731195][ C1] __kernel_text_address+0x9/0x30 [ 616.731199][ C1] unwind_get_return_address+0x51/0x90 [ 616.731202][ C1] ? profile_setup.cold+0xc1/0xc1 [ 616.731205][ C1] arch_stack_walk+0x97/0xf0 [ 616.731209][ C1] stack_trace_save+0x8c/0xc0 [ 616.731213][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 616.731216][ C1] ? __lock_acquire+0x161b/0x5570 [ 616.731219][ C1] kasan_save_stack+0x1b/0x40 [ 616.731222][ C1] ? kasan_save_stack+0x1b/0x40 [ 616.731226][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 616.731229][ C1] ? kmem_cache_alloc+0x13a/0x3a0 [ 616.731233][ C1] ? getname_flags.part.0+0x50/0x4f0 [ 616.731235][ C1] ? getname+0x8e/0xd0 [ 616.731239][ C1] ? do_sys_openat2+0xf5/0x420 [ 616.731242][ C1] ? __x64_sys_open+0x119/0x1c0 [ 616.731245][ C1] ? do_syscall_64+0x2d/0x70 [ 616.731249][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.731252][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.731256][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.731259][ C1] ? lock_acquire+0x1f3/0xae0 [ 616.731262][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.731266][ C1] ? find_held_lock+0x2d/0x110 [ 616.731269][ C1] ? fs_reclaim_release+0x90/0xd0 [ 616.731272][ C1] ? lock_downgrade+0x830/0x830 [ 616.731275][ C1] ? getname+0xd0/0xd0 [ 616.731278][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.731282][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.731285][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 616.731289][ C1] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 616.731292][ C1] kmem_cache_alloc+0x13a/0x3a0 [ 616.731296][ C1] getname_flags.part.0+0x50/0x4f0 [ 616.731299][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 616.731302][ C1] getname+0x8e/0xd0 [ 616.731305][ C1] do_sys_openat2+0xf5/0x420 [ 616.731309][ C1] ? seccomp_notify_ioctl+0xd90/0xd90 [ 616.731312][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 616.731315][ C1] ? build_open_flags+0x650/0x650 [ 616.731319][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.731322][ C1] __x64_sys_open+0x119/0x1c0 [ 616.731325][ C1] ? do_sys_open+0x140/0x140 [ 616.731328][ C1] ? __secure_computing+0x104/0x360 [ 616.731331][ C1] do_syscall_64+0x2d/0x70 [ 616.731335][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.731338][ C1] RIP: 0033:0x7f5cdaff7840 [ 616.731348][ 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 [ 616.731352][ C1] RSP: 002b:00007ffe99cc03a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 616.731360][ C1] RAX: ffffffffffffffda RBX: 00007ffe99cc06b0 RCX: 00007f5cdaff7840 [ 616.731365][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055c75bfbc780 [ 616.731369][ C1] RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff [ 616.731374][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 616.731379][ C1] R13: 000055c75bfaf040 R14: 00007ffe99cc0670 R15: 000055c75bfbc7d0 [ 616.732309][ T1170] Kernel panic - not syncing: hung_task: blocked tasks [ 617.205399][ T1170] CPU: 0 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.214823][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.224851][ T1170] Call Trace: [ 617.228126][ T1170] dump_stack+0x198/0x1fd [ 617.232499][ T1170] panic+0x347/0x7c0 [ 617.236389][ T1170] ? __warn_printk+0xf3/0xf3 [ 617.240968][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.246581][ T1170] ? preempt_schedule_thunk+0x16/0x18 [ 617.251952][ T1170] ? watchdog.cold+0x22d/0x24b [ 617.256699][ T1170] ? watchdog+0xc59/0xf30 [ 617.261012][ T1170] watchdog.cold+0x23e/0x24b [ 617.265600][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.271297][ T1170] kthread+0x3b5/0x4a0 [ 617.275344][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 617.280450][ T1170] ret_from_fork+0x1f/0x30 [ 617.286253][ T1170] Kernel Offset: disabled [ 617.290580][ T1170] Rebooting in 86400 seconds..