[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 636.745309][ T1170] INFO: task syz-executor939:6873 blocked for more than 143 seconds. [ 636.753551][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 636.762158][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.771999][ T1170] task:syz-executor939 state:D stack:28104 pid: 6873 ppid: 6867 flags:0x00004000 [ 636.781393][ T1170] Call Trace: [ 636.784827][ T1170] __schedule+0xea9/0x2230 [ 636.789334][ T1170] ? io_schedule_timeout+0x140/0x140 [ 636.794659][ T1170] schedule+0xd0/0x2a0 [ 636.798823][ T1170] schedule_timeout+0x1d8/0x250 [ 636.803679][ T1170] ? usleep_range+0x170/0x170 [ 636.808583][ T1170] ? lock_downgrade+0x830/0x830 [ 636.813474][ T1170] ? do_raw_spin_lock+0x120/0x2b0 [ 636.818640][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.823871][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.829931][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.835246][ T1170] wait_for_completion+0x163/0x260 [ 636.840368][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.846398][ T1170] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 636.852905][ T1170] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 636.858960][ T1170] ? __kthread_bind_mask+0xa1/0xc0 [ 636.864173][ T1170] io_uring_setup+0x1495/0x29a0 [ 636.869099][ T1170] ? io_sq_thread+0xe00/0xe00 [ 636.873809][ T1170] ? io_issue_sqe+0x5bb0/0x5bb0 [ 636.878750][ T1170] ? io_wake_function+0x2e0/0x2e0 [ 636.883804][ T1170] ? check_preemption_disabled+0x50/0x130 [ 636.889610][ T1170] ? syscall_enter_from_user_mode+0x20/0x290 [ 636.896273][ T1170] ? lockdep_hardirqs_on+0x53/0x100 [ 636.901536][ T1170] do_syscall_64+0x2d/0x70 [ 636.906227][ T1170] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.912370][ T1170] RIP: 0033:0x440299 [ 636.916535][ T1170] Code: Bad RIP value. [ 636.920601][ T1170] RSP: 002b:00007ffc61751c48 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 636.929107][ T1170] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299 [ 636.937283][ T1170] RDX: 0000000000400b40 RSI: 0000000020000200 RDI: 00000000000016bd [ 636.945352][ T1170] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 636.953406][ T1170] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0 [ 636.961626][ T1170] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 636.969793][ T1170] INFO: task io_uring-sq:6874 blocked for more than 143 seconds. [ 636.977677][ T1170] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 636.984703][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.993476][ T1170] task:io_uring-sq state:D stack:31200 pid: 6874 ppid: 2 flags:0x00004000 [ 637.002847][ T1170] Call Trace: [ 637.006257][ T1170] __schedule+0xea9/0x2230 [ 637.010794][ T1170] ? io_schedule_timeout+0x140/0x140 [ 637.016214][ T1170] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 637.022054][ T1170] schedule+0xd0/0x2a0 [ 637.027167][ T1170] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 637.033001][ T1170] schedule_preempt_disabled+0xf/0x20 [ 637.038492][ T1170] kthread+0x2ac/0x4a0 [ 637.042572][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 637.047833][ T1170] ret_from_fork+0x1f/0x30 [ 637.052306][ T1170] [ 637.052306][ T1170] Showing all locks held in the system: [ 637.060160][ T1170] 1 lock held by khungtaskd/1170: [ 637.065287][ T1170] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.075300][ T1170] [ 637.077639][ T1170] ============================================= [ 637.077639][ T1170] [ 637.086120][ T1170] NMI backtrace for cpu 1 [ 637.090455][ T1170] CPU: 1 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 637.099897][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.109963][ T1170] Call Trace: [ 637.113351][ T1170] dump_stack+0x198/0x1fd [ 637.117702][ T1170] nmi_cpu_backtrace.cold+0x44/0xd7 [ 637.122978][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.128617][ T1170] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.134685][ T1170] watchdog+0xd89/0xf30 [ 637.138836][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 637.144569][ T1170] kthread+0x3b5/0x4a0 [ 637.148651][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 637.153777][ T1170] ret_from_fork+0x1f/0x30 [ 637.158416][ T1170] Sending NMI from CPU 1 to CPUs 0: [ 637.164076][ C0] NMI backtrace for cpu 0 [ 637.164085][ C0] CPU: 0 PID: 3903 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 637.164091][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.164096][ C0] RIP: 0010:__seccomp_filter+0x141/0x1520 [ 637.164108][ C0] Code: 55 02 00 00 48 c7 c7 80 b8 4f 88 e8 19 bc da ff 0f 1f 44 00 00 e8 8f 85 ff ff 48 8d 7d 30 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 f2 10 00 00 48 8d 75 38 4c 89 ff ff 55 30 41 89 c5 e8 67 85 [ 637.164112][ C0] RSP: 0018:ffffc90001647d98 EFLAGS: 00000246 [ 637.164122][ C0] RAX: 1ffff920001bdc06 RBX: ffff88809371f400 RCX: dffffc0000000000 [ 637.164127][ C0] RDX: ffff88809306c400 RSI: ffffffff81755d71 RDI: ffffc90000dee030 [ 637.164133][ C0] RBP: ffffc90000dee000 R08: 0000000000000001 R09: 0000000000000001 [ 637.164146][ C0] R10: 000000007fff0000 R11: 0000000000000000 R12: dffffc0000000000 [ 637.164152][ C0] R13: 000000007fff0000 R14: 000000007fff0000 R15: ffffc90001647e40 [ 637.164158][ C0] FS: 00007f10a4ec78c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 637.164164][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.164169][ C0] CR2: 00007f10a226a000 CR3: 000000009372b000 CR4: 00000000001506f0 [ 637.164175][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.164181][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.164184][ C0] Call Trace: [ 637.164189][ C0] ? seccomp_notify_ioctl+0xd90/0xd90 [ 637.164194][ C0] ? check_preemption_disabled+0x50/0x130 [ 637.164198][ C0] ? call_rcu+0x37c/0x7c0 [ 637.164203][ C0] ? blkcg_maybe_throttle_current+0x640/0xd70 [ 637.164206][ C0] ? call_rcu+0x37c/0x7c0 [ 637.164211][ C0] ? lock_is_held_type+0xbb/0xf0 [ 637.164215][ C0] __secure_computing+0xfc/0x360 [ 637.164220][ C0] syscall_enter_from_user_mode+0xb7/0x290 [ 637.164224][ C0] do_syscall_64+0xf/0x70 [ 637.164228][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.164232][ C0] RIP: 0033:0x7f10a4160f17 [ 637.164243][ C0] Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 [ 637.164248][ C0] RSP: 002b:00007ffd20740b48 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 [ 637.164258][ C0] RAX: ffffffffffffffda RBX: 000055e9b25cd1e0 RCX: 00007f10a4160f17 [ 637.164263][ C0] RDX: 0000000000000000 RSI: 00007ffd20740c60 RDI: 000055e9b25cd1e0 [ 637.164269][ C0] RBP: 00007ffd20740c60 R08: 0669a21f768d0b7c R09: 0000000000000000 [ 637.164275][ C0] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000f3f [ 637.164280][ C0] R13: 00007ffd20740c08 R14: 00007ffd20740c60 R15: 00007ffd207411f8 [ 637.165156][ T1170] Kernel panic - not syncing: hung_task: blocked tasks [ 637.435145][ T1170] CPU: 1 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 637.444582][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.454624][ T1170] Call Trace: [ 637.457904][ T1170] dump_stack+0x198/0x1fd [ 637.462300][ T1170] panic+0x347/0x7c0 [ 637.466205][ T1170] ? __warn_printk+0xf3/0xf3 [ 637.470795][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.476418][ T1170] ? preempt_schedule_thunk+0x16/0x18 [ 637.481781][ T1170] ? watchdog.cold+0x22d/0x24b [ 637.486533][ T1170] ? watchdog+0xc59/0xf30 [ 637.490845][ T1170] watchdog.cold+0x23e/0x24b [ 637.495432][ T1170] ? trace_sched_process_hang+0x2e0/0x2e0 [ 637.501151][ T1170] kthread+0x3b5/0x4a0 [ 637.505213][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 637.510340][ T1170] ret_from_fork+0x1f/0x30 [ 637.516045][ T1170] Kernel Offset: disabled [ 637.520372][ T1170] Rebooting in 86400 seconds..