[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.48' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.303612][ T1171] INFO: task syz-executor943:6871 blocked for more than 143 seconds. [ 616.311903][ T1171] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.319642][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.328447][ T1171] task:syz-executor943 state:D stack:28104 pid: 6871 ppid: 6865 flags:0x00004000 [ 616.337801][ T1171] Call Trace: [ 616.341211][ T1171] __schedule+0xea9/0x2230 [ 616.345744][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.351065][ T1171] schedule+0xd0/0x2a0 [ 616.355252][ T1171] schedule_timeout+0x1d8/0x250 [ 616.360113][ T1171] ? usleep_range+0x170/0x170 [ 616.365067][ T1171] ? lock_downgrade+0x830/0x830 [ 616.369939][ T1171] ? do_raw_spin_lock+0x120/0x2b0 [ 616.375095][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.380324][ T1171] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.386395][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.391604][ T1171] wait_for_completion+0x163/0x260 [ 616.397207][ T1171] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.403417][ T1171] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.409939][ T1171] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 616.415926][ T1171] ? __kthread_bind_mask+0xa1/0xc0 [ 616.421168][ T1171] io_uring_setup+0x1495/0x29a0 [ 616.426282][ T1171] ? io_sq_thread+0xe00/0xe00 [ 616.430981][ T1171] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.435960][ T1171] ? io_wake_function+0x2e0/0x2e0 [ 616.441024][ T1171] ? check_preemption_disabled+0x50/0x130 [ 616.446850][ T1171] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.452851][ T1171] ? lockdep_hardirqs_on+0x53/0x100 [ 616.458212][ T1171] do_syscall_64+0x2d/0x70 [ 616.462660][ T1171] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.468766][ T1171] RIP: 0033:0x440299 [ 616.472668][ T1171] Code: Bad RIP value. [ 616.476902][ T1171] RSP: 002b:00007ffd0905b608 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.485452][ T1171] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 616.493507][ T1171] RDX: 0000000000400b40 RSI: 00000000200000c0 RDI: 0000000000003c48 [ 616.501498][ T1171] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.510413][ T1171] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 616.518747][ T1171] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 616.526907][ T1171] INFO: task io_uring-sq:6872 blocked for more than 143 seconds. [ 616.534741][ T1171] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.541760][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.550650][ T1171] task:io_uring-sq state:D stack:31200 pid: 6872 ppid: 2 flags:0x00004000 [ 616.559957][ T1171] Call Trace: [ 616.563363][ T1171] __schedule+0xea9/0x2230 [ 616.567797][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.573069][ T1171] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.578958][ T1171] schedule+0xd0/0x2a0 [ 616.583050][ T1171] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.588962][ T1171] schedule_preempt_disabled+0xf/0x20 [ 616.594407][ T1171] kthread+0x2ac/0x4a0 [ 616.598480][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.603790][ T1171] ret_from_fork+0x1f/0x30 [ 616.608244][ T1171] [ 616.608244][ T1171] Showing all locks held in the system: [ 616.616068][ T1171] 1 lock held by khungtaskd/1171: [ 616.621142][ T1171] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.631144][ T1171] [ 616.633533][ T1171] ============================================= [ 616.633533][ T1171] [ 616.641938][ T1171] NMI backtrace for cpu 0 [ 616.646369][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.655831][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.665881][ T1171] Call Trace: [ 616.669233][ T1171] dump_stack+0x198/0x1fd [ 616.673559][ T1171] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.678784][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.684417][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.690439][ T1171] watchdog+0xd89/0xf30 [ 616.694592][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.700305][ T1171] kthread+0x3b5/0x4a0 [ 616.704394][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.709489][ T1171] ret_from_fork+0x1f/0x30 [ 616.714042][ T1171] Sending NMI from CPU 0 to CPUs 1: [ 616.720363][ C1] NMI backtrace for cpu 1 [ 616.720371][ C1] CPU: 1 PID: 3894 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.720378][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.720383][ C1] RIP: 0010:unwind_next_frame+0x238/0x1f90 [ 616.720395][ C1] Code: ff 39 d6 0f 83 54 12 00 00 48 ba 00 00 00 00 00 fc ff df 41 89 f0 4a 8d 3c 85 50 6c ab 8b 49 89 f9 49 c1 e9 03 45 0f b6 0c 11 <48> 89 fa 83 e2 07 83 c2 03 44 38 ca 7c 32 45 84 c9 74 2d 4c 89 44 [ 616.720399][ C1] RSP: 0018:ffffc900012c75f8 EFLAGS: 00000a06 [ 616.720409][ C1] RAX: 0000000000000000 RBX: 1ffff92000258ec7 RCX: ffffffff81c48ecd [ 616.720415][ C1] RDX: dffffc0000000000 RSI: 000000000000c48e RDI: ffffffff8bae7e88 [ 616.720421][ C1] RBP: 0000000000000001 R08: 000000000000c48e R09: 0000000000000000 [ 616.720427][ C1] R10: 000000000007201e R11: 0000000000000001 R12: ffffc900012c7718 [ 616.720432][ C1] R13: ffffc900012c7705 R14: ffffc900012c7720 R15: ffffc900012c76d0 [ 616.720439][ C1] FS: 00007fd3264408c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 616.720444][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.720449][ C1] CR2: 00007fd3237e3000 CR3: 000000009497f000 CR4: 00000000001506e0 [ 616.720463][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.720469][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.720473][ C1] Call Trace: [ 616.720477][ C1] ? do_filp_open+0x17e/0x3c0 [ 616.720481][ C1] ? deref_stack_reg+0x150/0x150 [ 616.720485][ C1] ? __unwind_start+0x517/0x800 [ 616.720489][ C1] ? profile_setup.cold+0xc1/0xc1 [ 616.720493][ C1] arch_stack_walk+0x81/0xf0 [ 616.720498][ C1] ? do_filp_open+0x17e/0x3c0 [ 616.720502][ C1] stack_trace_save+0x8c/0xc0 [ 616.720506][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 616.720511][ C1] ? __lock_acquire+0x161b/0x5570 [ 616.720515][ C1] kasan_save_stack+0x1b/0x40 [ 616.720519][ C1] ? kasan_save_stack+0x1b/0x40 [ 616.720524][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 616.720528][ C1] ? kmem_cache_alloc+0x13a/0x3a0 [ 616.720532][ C1] ? __alloc_file+0x21/0x350 [ 616.720537][ C1] ? alloc_empty_file+0x6d/0x170 [ 616.720541][ C1] ? path_openat+0xe3/0x2730 [ 616.720545][ C1] ? do_filp_open+0x17e/0x3c0 [ 616.720549][ C1] ? find_held_lock+0x2d/0x110 [ 616.720554][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.720558][ C1] ? lock_downgrade+0x830/0x830 [ 616.720562][ C1] ? lock_acquire+0x1f3/0xae0 [ 616.720567][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.720571][ C1] ? find_held_lock+0x2d/0x110 [ 616.720575][ C1] ? fs_reclaim_release+0x90/0xd0 [ 616.720579][ C1] ? lock_downgrade+0x830/0x830 [ 616.720584][ C1] ? unwind_get_return_address+0x51/0x90 [ 616.720588][ C1] ? profile_setup.cold+0xc1/0xc1 [ 616.720592][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.720597][ C1] ? check_preemption_disabled+0x50/0x130 [ 616.720601][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 616.720606][ C1] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 616.720610][ C1] kmem_cache_alloc+0x13a/0x3a0 [ 616.720614][ C1] __alloc_file+0x21/0x350 [ 616.720618][ C1] alloc_empty_file+0x6d/0x170 [ 616.720622][ C1] path_openat+0xe3/0x2730 [ 616.720626][ C1] ? __lock_acquire+0x161b/0x5570 [ 616.720630][ C1] ? path_lookupat+0x830/0x830 [ 616.720635][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.720639][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.720644][ C1] ? lock_is_held_type+0xbb/0xf0 [ 616.720648][ C1] do_filp_open+0x17e/0x3c0 [ 616.720652][ C1] ? may_open_dev+0xf0/0xf0 [ 616.720656][ C1] ? __alloc_fd+0x28d/0x600 [ 616.720660][ C1] ? lock_downgrade+0x830/0x830 [ 616.720664][ C1] ? do_raw_spin_lock+0x120/0x2b0 [ 616.720668][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 616.720672][ C1] ? _raw_spin_unlock+0x24/0x40 [ 616.720677][ C1] ? __alloc_fd+0x28d/0x600 [ 616.720681][ C1] do_sys_openat2+0x16d/0x420 [ 616.720685][ C1] ? seccomp_notify_ioctl+0xd90/0xd90 [ 616.720690][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 616.720694][ C1] ? build_open_flags+0x650/0x650 [ 616.720698][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.720702][ C1] __x64_sys_open+0x119/0x1c0 [ 616.720706][ C1] ? do_sys_open+0x140/0x140 [ 616.720711][ C1] ? __secure_computing+0x104/0x360 [ 616.720715][ C1] do_syscall_64+0x2d/0x70 [ 616.720719][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.720723][ C1] RIP: 0033:0x7fd3259d0840 [ 616.720735][ 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 [ 616.720739][ C1] RSP: 002b:00007ffd3e18a6b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 616.720749][ C1] RAX: ffffffffffffffda RBX: 00007ffd3e18a9c0 RCX: 00007fd3259d0840 [ 616.720755][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000056517e587270 [ 616.720760][ C1] RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff [ 616.720766][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 616.720772][ C1] R13: 000056517e57c040 R14: 00007ffd3e18a980 R15: 000056517e5872c0 [ 616.720778][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 616.721273][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 617.238790][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.248781][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.258814][ T1171] Call Trace: [ 617.262098][ T1171] dump_stack+0x198/0x1fd [ 617.266488][ T1171] panic+0x347/0x7c0 [ 617.270371][ T1171] ? __warn_printk+0xf3/0xf3 [ 617.274958][ T1171] ? cpumask_next+0x3c/0x40 [ 617.279466][ T1171] ? printk_safe_flush+0xd6/0x120 [ 617.284474][ T1171] ? watchdog.cold+0x22d/0x24b [ 617.289569][ T1171] ? watchdog+0xc59/0xf30 [ 617.294067][ T1171] watchdog.cold+0x23e/0x24b [ 617.298656][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.304391][ T1171] kthread+0x3b5/0x4a0 [ 617.308442][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.313637][ T1171] ret_from_fork+0x1f/0x30 [ 617.319357][ T1171] Kernel Offset: disabled [ 617.323700][ T1171] Rebooting in 86400 seconds..