Warning: Permanently added '10.128.15.232' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 412.216359] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 567.074029] INFO: task syz-executor925:7871 blocked for more than 140 seconds. [ 567.081703] Not tainted 4.20.0-rc7+ #360 [ 567.086435] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 567.094451] syz-executor925 D19912 7871 7870 0x00000004 [ 567.100074] Call Trace: [ 567.102785] __schedule+0x86c/0x1ed0 [ 567.106580] ? __sched_text_start+0x8/0x8 [ 567.110729] ? kasan_check_read+0x11/0x20 [ 567.114937] ? do_raw_spin_unlock+0xa7/0x330 [ 567.119339] ? trace_hardirqs_on+0x310/0x310 [ 567.123735] ? rcu_read_lock+0x70/0x70 [ 567.127670] ? kthread_data+0x58/0xc0 [ 567.131482] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 567.136668] ? graph_lock+0x270/0x270 [ 567.140546] schedule+0xfe/0x460 [ 567.143966] ? __schedule+0x1ed0/0x1ed0 [ 567.148025] ? find_held_lock+0x36/0x1c0 [ 567.152106] ? mark_held_locks+0xc7/0x130 [ 567.156318] schedule_timeout+0x1cc/0x260 [ 567.160494] ? usleep_range+0x1a0/0x1a0 [ 567.164532] ? wait_for_completion+0x41f/0x8a0 [ 567.169125] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 567.174621] wait_for_completion+0x427/0x8a0 [ 567.179040] ? wait_for_completion_interruptible+0x840/0x840 [ 567.185005] ? wake_up_q+0x100/0x100 [ 567.188713] ? lockdep_hardirqs_on+0x421/0x5c0 [ 567.193280] ? trace_hardirqs_on+0xbd/0x310 [ 567.197646] ? kasan_check_read+0x11/0x20 [ 567.201911] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 567.207448] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 567.212980] __flush_work+0x59c/0x9b0 [ 567.216822] ? try_to_grab_pending+0x180/0x9b0 [ 567.221395] ? insert_work+0x4c0/0x4c0 [ 567.225319] ? mark_held_locks+0xc7/0x130 [ 567.229458] ? __cancel_work_timer+0x261/0x820 [ 567.234128] ? flush_workqueue_prep_pwqs+0x810/0x810 [ 567.239230] __cancel_work_timer+0x4ba/0x820 [ 567.243624] ? try_to_grab_pending+0x9b0/0x9b0 [ 567.248239] ? lock_downgrade+0x900/0x900 [ 567.252380] ? trace_hardirqs_off+0xb8/0x310 [ 567.256821] ? kasan_check_read+0x11/0x20 [ 567.260966] ? do_raw_spin_unlock+0xa7/0x330 [ 567.265435] ? trace_hardirqs_on+0x310/0x310 [ 567.269842] ? unwind_get_return_address+0x61/0xa0 [ 567.274830] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 567.279926] ? depot_save_stack+0x292/0x470 [ 567.284283] ? save_stack+0xa9/0xd0 [ 567.287899] ? save_stack+0x43/0xd0 [ 567.291615] ? __kasan_slab_free+0x102/0x150 [ 567.296087] ? kasan_slab_free+0xe/0x10 [ 567.300155] ? kfree+0xcf/0x230 [ 567.303423] ? print_usage_bug+0xc0/0xc0 [ 567.307538] ? __sock_release+0xd7/0x250 [ 567.311592] ? sock_close+0x19/0x20 [ 567.315274] cancel_delayed_work_sync+0x1a/0x20 [ 567.319959] tls_sw_free_resources_tx+0x1df/0xcf0 [ 567.324953] ? trace_hardirqs_on+0x310/0x310 [ 567.329363] ? tls_sw_stream_read+0x4a0/0x4a0 [ 567.333918] ? mark_held_locks+0xc7/0x130 [ 567.338218] ? kfree+0x107/0x230 [ 567.341569] ? kfree+0x107/0x230 [ 567.344992] ? lockdep_hardirqs_on+0x421/0x5c0 [ 567.349711] ? trace_hardirqs_on+0xbd/0x310 [ 567.354085] ? tls_sk_proto_close+0x5fa/0x750 [ 567.358649] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 567.364157] ? __kasan_slab_free+0x119/0x150 [ 567.368555] ? tls_sk_proto_close+0x5fa/0x750 [ 567.373036] tls_sk_proto_close+0x602/0x750 [ 567.377409] ? tcp_check_oom+0x530/0x530 [ 567.381577] ? tls_push_pending_closed_record+0x240/0x240 [ 567.387202] ? ipv6_sock_mc_close+0x162/0x1d0 [ 567.391715] ? ip_mc_drop_socket+0x20b/0x270 [ 567.396170] ? down_write+0x8a/0x130 [ 567.399879] inet_release+0x104/0x1f0 [ 567.403680] inet6_release+0x50/0x70 [ 567.407457] __sock_release+0xd7/0x250 [ 567.411350] ? __sock_release+0x250/0x250 [ 567.415575] sock_close+0x19/0x20 [ 567.419031] __fput+0x385/0xa30 [ 567.422306] ? get_max_files+0x20/0x20 [ 567.426240] ? trace_hardirqs_on+0xbd/0x310 [ 567.430550] ? kasan_check_read+0x11/0x20 [ 567.434768] ? task_work_run+0x1af/0x2a0 [ 567.438836] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 567.444375] ? filp_close+0x1cd/0x250 [ 567.448180] ____fput+0x15/0x20 [ 567.451455] task_work_run+0x1e8/0x2a0 [ 567.455399] ? task_work_cancel+0x240/0x240 [ 567.459841] ? copy_fd_bitmaps+0x210/0x210 [ 567.464141] ? do_syscall_64+0x9a/0x820 [ 567.468113] exit_to_usermode_loop+0x318/0x380 [ 567.472692] ? syscall_trace_enter+0x1260/0x1260 [ 567.477752] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 567.483281] do_syscall_64+0x6be/0x820 [ 567.487227] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 567.492580] ? syscall_return_slowpath+0x5e0/0x5e0 [ 567.497561] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 567.502478] ? trace_hardirqs_on_caller+0x310/0x310 [ 567.507558] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 567.512564] ? prepare_exit_to_usermode+0x291/0x3b0 [ 567.517634] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 567.522478] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 567.527707] RIP: 0033:0x401010 [ 567.530892] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d bd 16 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 [ 567.550123] RSP: 002b:00007ffec7856f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 567.557879] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000401010 [ 567.565363] RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000004 [ 567.572728] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 567.580090] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f20 [ 567.587387] R13: 0000000000401fb0 R14: 0000000000000000 R15: 0000000000000000 [ 567.594859] [ 567.594859] Showing all locks held in the system: [ 567.601353] 2 locks held by kworker/0:0/5: [ 567.605664] #0: 000000006d11dec0 ((wq_completion)"events"){+.+.}, at: process_one_work+0xb43/0x1c40 [ 567.614974] #1: 00000000ccfe6c9a ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0xb9a/0x1c40 [ 567.626991] 1 lock held by khungtaskd/1014: [ 567.631430] #0: 00000000153ed952 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 [ 567.640306] 1 lock held by rsyslogd/7757: [ 567.644474] #0: 0000000034b64696 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 567.652538] 2 locks held by getty/7847: [ 567.656559] #0: 00000000d063ffb7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.664966] #1: 0000000045d4d183 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.673825] 2 locks held by getty/7848: [ 567.677841] #0: 00000000dda11696 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.686109] #1: 00000000a02eb135 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.695018] 2 locks held by getty/7849: [ 567.699082] #0: 0000000013f4e4e1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.707370] #1: 00000000f6bb4c99 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.716493] 2 locks held by getty/7850: [ 567.720453] #0: 00000000daef1117 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.728782] #1: 00000000229b8dfc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.737761] 2 locks held by getty/7851: [ 567.741733] #0: 000000005093d448 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.750028] #1: 00000000bca705ed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.759024] 2 locks held by getty/7852: [ 567.762988] #0: 000000000f124289 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.771272] #1: 00000000a9adbb34 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.780138] 2 locks held by getty/7853: [ 567.784144] #0: 0000000027476b58 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 567.792501] #1: 000000007cc578ce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 567.801504] 2 locks held by syz-executor925/7871: [ 567.806376] #0: 00000000997b6df5 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x8b/0x250 [ 567.815700] #1: 00000000af711cb5 (sk_lock-AF_INET6){+.+.}, at: wait_on_pending_writer+0x27c/0x5b0 [ 567.824943] [ 567.826555] ============================================= [ 567.826555] [ 567.833648] NMI backtrace for cpu 1 [ 567.837320] CPU: 1 PID: 1014 Comm: khungtaskd Not tainted 4.20.0-rc7+ #360 [ 567.844322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 567.853661] Call Trace: [ 567.856235] dump_stack+0x1d3/0x2c6 [ 567.859849] ? dump_stack_print_info.cold.1+0x20/0x20 [ 567.865042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 567.870635] ? lapic_can_unplug_cpu.cold.28+0x3f/0x3f [ 567.875816] nmi_cpu_backtrace.cold.4+0x63/0xa2 [ 567.880474] ? lapic_can_unplug_cpu.cold.28+0x3f/0x3f [ 567.885651] nmi_trigger_cpumask_backtrace+0x1c2/0x22c [ 567.891018] arch_trigger_cpumask_backtrace+0x14/0x20 [ 567.896210] watchdog+0xb51/0x1060 [ 567.899775] ? hungtask_pm_notify+0xb0/0xb0 [ 567.904146] ? __kthread_parkme+0xce/0x1a0 [ 567.908416] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 567.913615] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 567.918704] ? lockdep_hardirqs_on+0x421/0x5c0 [ 567.923393] ? trace_hardirqs_on+0xbd/0x310 [ 567.927702] ? kasan_check_read+0x11/0x20 [ 567.931840] ? __kthread_parkme+0xce/0x1a0 [ 567.936086] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 567.941523] ? preempt_schedule+0x4d/0x60 [ 567.945659] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 567.950751] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 567.956273] ? __kthread_parkme+0xfb/0x1a0 [ 567.960499] ? hungtask_pm_notify+0xb0/0xb0 [ 567.964872] kthread+0x35a/0x440 [ 567.968230] ? kthread_bind+0x40/0x40 [ 567.972106] ret_from_fork+0x3a/0x50 [ 567.975949] Sending NMI from CPU 1 to CPUs 0: [ 567.980545] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 [ 567.981465] Kernel panic - not syncing: hung_task: blocked tasks [ 567.994235] CPU: 1 PID: 1014 Comm: khungtaskd Not tainted 4.20.0-rc7+ #360 [ 568.001245] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 568.010586] Call Trace: [ 568.013187] dump_stack+0x1d3/0x2c6 [ 568.016801] ? dump_stack_print_info.cold.1+0x20/0x20 [ 568.021982] ? find_next_bit+0x104/0x130 [ 568.026040] panic+0x2ad/0x55c [ 568.029224] ? add_taint.cold.5+0x16/0x16 [ 568.033376] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 568.039079] ? nmi_trigger_cpumask_backtrace+0x1ab/0x22c [ 568.044533] ? nmi_trigger_cpumask_backtrace+0x1a2/0x22c [ 568.049975] watchdog+0xb62/0x1060 [ 568.053508] ? hungtask_pm_notify+0xb0/0xb0 [ 568.057814] ? __kthread_parkme+0xce/0x1a0 [ 568.062202] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 568.067386] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 568.072498] ? lockdep_hardirqs_on+0x421/0x5c0 [ 568.077260] ? trace_hardirqs_on+0xbd/0x310 [ 568.081573] ? kasan_check_read+0x11/0x20 [ 568.085770] ? __kthread_parkme+0xce/0x1a0 [ 568.089996] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 568.095544] ? preempt_schedule+0x4d/0x60 [ 568.099734] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 568.104842] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 568.110416] ? __kthread_parkme+0xfb/0x1a0 [ 568.114690] ? hungtask_pm_notify+0xb0/0xb0 [ 568.119000] kthread+0x35a/0x440 [ 568.122418] ? kthread_bind+0x40/0x40 [ 568.126213] ret_from_fork+0x3a/0x50 [ 568.130955] Kernel Offset: disabled [ 568.134651] Rebooting in 86400 seconds..