[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 55.140783][ T26] audit: type=1800 audit(1574821579.455:25): pid=8561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 55.162317][ T26] audit: type=1800 audit(1574821579.465:26): pid=8561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 55.183222][ T26] audit: type=1800 audit(1574821579.465:27): pid=8561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.168' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 562.701639][ T1071] INFO: task syz-executor149:8714 blocked for more than 143 seconds.
[ 562.709918][ T1071] Not tainted 5.4.0-syzkaller #0
[ 562.715517][ T1071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 562.724398][ T1071] syz-executor149 D28816 8714 8711 0x00000004
[ 562.730718][ T1071] Call Trace:
[ 562.734192][ T1071] __schedule+0x909/0x1ee0
[ 562.738632][ T1071] ? __sched_text_start+0x8/0x8
[ 562.743539][ T1071] ? lockdep_hardirqs_on+0x421/0x5e0
[ 562.748888][ T1071] ? __lock_sock+0x160/0x290
[ 562.753541][ T1071] ? trace_hardirqs_on+0x67/0x240
[ 562.758564][ T1071] schedule+0xdc/0x2b0
[ 562.762680][ T1071] __lock_sock+0x165/0x290
[ 562.767117][ T1071] ? __sk_dst_check+0x2e0/0x2e0
[ 562.772031][ T1071] ? finish_wait+0x260/0x260
[ 562.776624][ T1071] lock_sock_nested+0xfe/0x120
[ 562.781440][ T1071] virtio_transport_release+0xc4/0xcb0
[ 562.786954][ T1071] ? virtio_transport_close_timeout+0x130/0x130
[ 562.793246][ T1071] ? __local_bh_enable_ip+0x15a/0x270
[ 562.798611][ T1071] ? lock_sock_nested+0xe2/0x120
[ 562.803607][ T1071] ? __local_bh_enable_ip+0x15a/0x270
[ 562.808979][ T1071] ? lockdep_hardirqs_on+0x421/0x5e0
[ 562.814330][ T1071] ? lock_sock_nested+0x9a/0x120
[ 562.819272][ T1071] ? trace_hardirqs_on+0x67/0x240
[ 562.825021][ T1071] ? lock_sock_nested+0x9a/0x120
[ 562.829969][ T1071] vsock_assign_transport+0xea/0x330
[ 562.835332][ T1071] vsock_stream_connect+0x2b3/0xbe0
[ 562.840537][ T1071] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 562.846873][ T1071] ? vsock_dgram_connect+0x470/0x470
[ 562.852213][ T1071] ? debug_lockdep_rcu_enabled+0x71/0xa0
[ 562.857844][ T1071] ? finish_wait+0x260/0x260
[ 562.862498][ T1071] ? apparmor_socket_connect+0xb6/0x160
[ 562.868037][ T1071] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 562.874340][ T1071] __sys_connect+0x264/0x330
[ 562.878940][ T1071] ? __ia32_sys_accept+0xb0/0xb0
[ 562.883929][ T1071] ? up_read+0x1d2/0x810
[ 562.888210][ T1071] ? __x64_sys_futex+0x404/0x590
[ 562.893210][ T1071] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 562.899450][ T1071] ? trace_hardirqs_on_thunk+0x1a/0x20
[ 562.904991][ T1071] ? trace_hardirqs_on_thunk+0x1a/0x20
[ 562.910441][ T1071] ? do_syscall_64+0x26/0x760
[ 562.915167][ T1071] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 562.921223][ T1071] ? do_syscall_64+0x26/0x760
[ 562.926113][ T1071] __x64_sys_connect+0x73/0xb0
[ 562.930869][ T1071] do_syscall_64+0xfa/0x760
[ 562.935423][ T1071] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 562.941322][ T1071] RIP: 0033:0x4457f9
[ 562.945287][ T1071] Code: Bad RIP value.
[ 562.949355][ T1071] RSP: 002b:00007f0ffc84fdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[ 562.958457][ T1071] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 00000000004457f9
[ 562.966486][ T1071] RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000003
[ 562.974495][ T1071] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000
[ 562.982505][ T1071] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c
[ 562.990480][ T1071] R13: 00007ffc3b38375f R14: 00007f0ffc8509c0 R15: 20c49ba5e353f7cf
[ 562.998545][ T1071]
[ 562.998545][ T1071] Showing all locks held in the system:
[ 563.006330][ T1071] 1 lock held by khungtaskd/1071:
[ 563.011474][ T1071] #0: ffffffff88fac3c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e
[ 563.020781][ T1071] 1 lock held by rsyslogd/8599:
[ 563.025656][ T1071] 3 locks held by getty/8689:
[ 563.030326][ T1071] #0: ffff8880a41abde0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.038969][ T1071] #1: ffff8880939db090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.047954][ T1071] #2: ffffc90005f252e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.057624][ T1071] 3 locks held by getty/8690:
[ 563.062316][ T1071] #0: ffff8880a83b9de0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.070888][ T1071] #1: ffff8880a1be5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.079871][ T1071] #2: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.089975][ T1071] 3 locks held by getty/8691:
[ 563.094743][ T1071] #0: ffff8880a28150e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.103394][ T1071] #1: ffff8880a752c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.112391][ T1071] #2: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.121988][ T1071] 3 locks held by getty/8692:
[ 563.126642][ T1071] #0: ffff88809aea78a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.135289][ T1071] #1: ffff8880a70dd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.144260][ T1071] #2: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.153855][ T1071] 3 locks held by getty/8693:
[ 563.158513][ T1071] #0: ffff8880a459b8a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.167138][ T1071] #1: ffff8880948fd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.176119][ T1071] #2: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.185695][ T1071] 3 locks held by getty/8694:
[ 563.190352][ T1071] #0: ffff88809173f0e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.198991][ T1071] #1: ffff8880a7532090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.207974][ T1071] #2: ffffc90005f192e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.218202][ T1071] 3 locks held by getty/8695:
[ 563.222916][ T1071] #0: ffff88809a68e5e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110
[ 563.231558][ T1071] #1: ffff8880a0486090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
[ 563.240479][ T1071] #2: ffffc90005f092e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10
[ 563.250061][ T1071] 1 lock held by syz-executor149/8714:
[ 563.255542][ T1071] #0: ffff8880a51cf8d0 (sk_lock-AF_VSOCK){+.+.}, at: vsock_stream_connect+0xfb/0xbe0
[ 563.265131][ T1071]
[ 563.267448][ T1071] =============================================
[ 563.267448][ T1071]
[ 563.275901][ T1071] NMI backtrace for cpu 1
[ 563.280219][ T1071] CPU: 1 PID: 1071 Comm: khungtaskd Not tainted 5.4.0-syzkaller #0
[ 563.288088][ T1071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 563.298131][ T1071] Call Trace:
[ 563.301400][ T1071] dump_stack+0x197/0x210
[ 563.305712][ T1071] nmi_cpu_backtrace.cold+0x70/0xb2
[ 563.310887][ T1071] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 563.317105][ T1071] ? lapic_can_unplug_cpu.cold+0x3a/0x3a
[ 563.322712][ T1071] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 563.328678][ T1071] arch_trigger_cpumask_backtrace+0x14/0x20
[ 563.334543][ T1071] watchdog+0x9d0/0xef0
[ 563.338680][ T1071] kthread+0x361/0x430
[ 563.342722][ T1071] ? reset_hung_task_detector+0x30/0x30
[ 563.348500][ T1071] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 563.354205][ T1071] ret_from_fork+0x24/0x30
[ 563.358759][ T1071] Sending NMI from CPU 1 to CPUs 0:
[ 563.364650][ C0] NMI backtrace for cpu 0
[ 563.364656][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0
[ 563.364662][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 563.364666][ C0] RIP: 0010:__lock_acquire+0x3b4/0x4a00
[ 563.364676][ C0] Code: 41 c1 e7 13 44 09 e9 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df 44 09 c9 44 8b 4d 20 41 09 cf 41 c1 e1 14 45 09 cf 45 8b 4a 20 <41> 81 e1 ff 1f 00 00 45 09 cf 45 89 7a 20 0f b6 14 02 48 89 f8 83
[ 563.364680][ C0] RSP: 0018:ffff8880ae809d38 EFLAGS: 00000006
[ 563.364688][ C0] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000060000
[ 563.364693][ C0] RDX: 1ffffffff11cf54f RSI: 0000000000000037 RDI: ffffffff88e7aa7c
[ 563.364697][ C0] RBP: ffff8880ae809e50 R08: 0000000000000001 R09: 00000000000c0037
[ 563.364702][ C0] R10: ffffffff88e7aa58 R11: ffffffff88e7a1c0 R12: 0000000000000037
[ 563.364707][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 00000000000e0000
[ 563.364712][ C0] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[ 563.364716][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 563.364721][ C0] CR2: ffffffffff600400 CR3: 00000000a8bf8000 CR4: 00000000001406f0
[ 563.364726][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 563.364731][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 563.364733][ C0] Call Trace:
[ 563.364736][ C0]
[ 563.364739][ C0] ? __kasan_check_read+0x11/0x20
[ 563.364742][ C0] ? __lock_acquire+0x16f2/0x4a00
[ 563.364746][ C0] ? mark_held_locks+0xf0/0xf0
[ 563.364749][ C0] ? find_held_lock+0x35/0x130
[ 563.364753][ C0] ? tick_nohz_irq_exit+0xa8/0x140
[ 563.364756][ C0] lock_acquire+0x190/0x410
[ 563.364759][ C0] ? tick_irq_enter+0xb5/0x3f0
[ 563.364762][ C0] ktime_get+0xd2/0x300
[ 563.364765][ C0] ? tick_irq_enter+0xb5/0x3f0
[ 563.364770][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 563.364773][ C0] tick_irq_enter+0xb5/0x3f0
[ 563.364776][ C0] irq_enter+0xbd/0xe0
[ 563.364779][ C0] scheduler_ipi+0x28e/0x640
[ 563.364783][ C0] smp_reschedule_interrupt+0x78/0x4c0
[ 563.364786][ C0] reschedule_interrupt+0xf/0x20
[ 563.364789][ C0]
[ 563.364792][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 563.364802][ C0] Code: 28 c2 59 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 94 e7 51 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 e7 51 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 9e 4a 0b fa e8 29
[ 563.364806][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02
[ 563.364814][ C0] RAX: 1ffffffff11e65ef RBX: ffffffff88e7a1c0 RCX: 0000000000000000
[ 563.364819][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa54
[ 563.364824][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000
[ 563.364829][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 563.364833][ C0] R13: ffffffff89c76a00 R14: 0000000000000000 R15: 0000000000000000
[ 563.364836][ C0] ? default_idle+0x4e/0x360
[ 563.364840][ C0] arch_cpu_idle+0xa/0x10
[ 563.364843][ C0] default_idle_call+0x84/0xb0
[ 563.364846][ C0] do_idle+0x3b7/0x6e0
[ 563.364855][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 563.364858][ C0] ? trace_hardirqs_on+0x67/0x240
[ 563.364862][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 563.364866][ C0] ? debug_smp_processor_id+0x3c/0x214
[ 563.364869][ C0] cpu_startup_entry+0x1b/0x20
[ 563.364873][ C0] rest_init+0x245/0x37b
[ 563.364876][ C0] arch_call_rest_init+0xe/0x1b
[ 563.364879][ C0] start_kernel+0x904/0x943
[ 563.364883][ C0] ? mem_encrypt_init+0xb/0xb
[ 563.364887][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 563.364890][ C0] ? x86_family+0x41/0x50
[ 563.364894][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 563.364898][ C0] x86_64_start_reservations+0x29/0x2b
[ 563.364901][ C0] x86_64_start_kernel+0x77/0x7b
[ 563.364905][ C0] secondary_startup_64+0xa4/0xb0
[ 563.365807][ T1071] Kernel panic - not syncing: hung_task: blocked tasks
[ 563.752344][ T1071] CPU: 1 PID: 1071 Comm: khungtaskd Not tainted 5.4.0-syzkaller #0
[ 563.760209][ T1071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 563.770261][ T1071] Call Trace:
[ 563.773556][ T1071] dump_stack+0x197/0x210
[ 563.777889][ T1071] panic+0x2e3/0x75c
[ 563.781885][ T1071] ? add_taint.cold+0x16/0x16
[ 563.786557][ T1071] ? lapic_can_unplug_cpu.cold+0x3a/0x3a
[ 563.792191][ T1071] ? ___preempt_schedule+0x16/0x20
[ 563.797287][ T1071] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b
[ 563.803420][ T1071] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b
[ 563.809548][ T1071] ? nmi_trigger_cpumask_backtrace+0x256/0x28b
[ 563.815680][ T1071] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b
[ 563.821812][ T1071] watchdog+0x9e1/0xef0
[ 563.825951][ T1071] kthread+0x361/0x430
[ 563.829995][ T1071] ? reset_hung_task_detector+0x30/0x30
[ 563.835516][ T1071] ? kthread_mod_delayed_work+0x1f0/0x1f0
[ 563.841211][ T1071] ret_from_fork+0x24/0x30
[ 563.847204][ T1071] Kernel Offset: disabled
[ 563.851538][ T1071] Rebooting in 86400 seconds..