syzkaller login: [ 32.146623] can: request_module (can-proto-0) failed. [ 32.155657] can: request_module (can-proto-0) failed. [ 32.764570] IPVS: ftp: loaded support on port[0] = 21 [ 33.057423] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 33.492724] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 33.498935] 8021q: adding VLAN 0 to HW filter on device bond0 [ 33.545796] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 33.593032] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 33.791461] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts. 2018/03/31 15:54:06 parsed 1 programs 2018/03/31 15:54:06 executed programs: 0 [ 40.745010] IPVS: ftp: loaded support on port[0] = 21 [ 40.790625] IPVS: ftp: loaded support on port[0] = 21 [ 40.803846] IPVS: sync thread started: state = BACKUP, mcast_ifn = lo, syncid = 4, id = 0 [ 40.812129] IPVS: stopping backup sync thread 4713 ... result: failed=false hanged=false err=executor 0: not serving 2018/03/31 15:55:06 executed programs: 8 result: failed=false hanged=false err=executor 4: not serving result: failed=false hanged=false err=executor 6: not serving result: failed=false hanged=false err=executor 7: not serving result: failed=false hanged=false err=executor 2: not serving result: failed=false hanged=false err=executor 1: not serving result: failed=false hanged=false err=executor 0: not serving 2018/03/31 15:56:06 executed programs: 14 result: failed=false hanged=false err=executor 4: not serving result: failed=false hanged=false err=executor 7: not serving result: failed=false hanged=false err=executor 6: not serving result: failed=false hanged=false err=executor 2: not serving result: failed=false hanged=false err=executor 1: not serving result: failed=false hanged=false err=executor 0: not serving result: failed=false hanged=false err=executor 4: not serving [ 246.752143] INFO: task kworker/1:1:23 blocked for more than 120 seconds. [ 246.759122] Not tainted 4.16.0-rc7+ #81 [ 246.763650] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 246.771646] kworker/1:1 D20360 23 2 0x80000000 [ 246.777391] Workqueue: events_power_efficient reg_check_chans_work [ 246.783769] Call Trace: [ 246.786435] __schedule+0x8fb/0x1ec0 [ 246.790172] ? __sched_text_start+0x8/0x8 [ 246.794355] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 246.800263] ? ret_from_fork+0x3a/0x50 [ 246.804177] ? __bfs+0xa8/0x830 [ 246.807466] ? trace_hardirqs_off+0x10/0x10 [ 246.811801] ? trace_hardirqs_off+0x10/0x10 [ 246.816175] ? noop_count+0x40/0x40 [ 246.819829] ? find_held_lock+0x35/0x1d0 [ 246.824654] schedule+0xf5/0x430 [ 246.828044] ? __mutex_lock+0xaa8/0x1a80 [ 246.832118] ? __schedule+0x1ec0/0x1ec0 [ 246.836115] ? lock_release+0xa40/0xa40 [ 246.840126] ? memset+0x31/0x40 [ 246.843438] ? do_raw_spin_trylock+0x190/0x190 [ 246.848039] ? debug_mutex_free_waiter+0x1b0/0x1b0 [ 246.852990] ? mutex_destroy+0x1d0/0x1d0 [ 246.857076] schedule_preempt_disabled+0x10/0x20 [ 246.861853] __mutex_lock+0xaad/0x1a80 [ 246.865767] ? __unwind_start+0x169/0x330 [ 246.869935] ? rtnl_lock+0x17/0x20 [ 246.873485] ? mutex_lock_io_nested+0x1900/0x1900 [ 246.878353] ? print_lockdep_cache.isra.32+0x109/0x109 [ 246.883648] ? save_stack_trace+0x1a/0x20 [ 246.887812] ? save_trace+0xe0/0x2b0 [ 246.891544] ? __lock_acquire+0x36c0/0x3e00 [ 246.895897] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 246.901104] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 246.906340] ? trace_hardirqs_off+0x10/0x10 [ 246.910671] ? trace_hardirqs_off+0x10/0x10 [ 246.915028] ? rcu_read_unlock+0x35/0x70 [ 246.919105] ? update_curr+0x46f/0xac0 [ 246.923007] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 246.928228] ? __queue_delayed_work+0x226/0x340 [ 246.932921] ? find_held_lock+0x35/0x1d0 [ 246.937009] mutex_lock_nested+0x16/0x20 [ 246.941110] ? mutex_lock_nested+0x16/0x20 [ 246.945370] rtnl_lock+0x17/0x20 [ 246.948747] reg_check_chans_work+0xaa/0xff0 [ 246.953190] ? lock_release+0xa40/0xa40 [ 246.957177] ? queue_regulatory_request+0x300/0x300 [ 246.962213] ? trace_hardirqs_off+0x10/0x10 [ 246.966541] ? lock_acquire+0x1d5/0x580 [ 246.970525] ? lock_acquire+0x1d5/0x580 [ 246.974501] ? process_one_work+0xb89/0x1bb0 [ 246.978934] ? __lock_is_held+0xb6/0x140 [ 246.983038] process_one_work+0xc47/0x1bb0 [ 246.987286] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 246.992496] ? trace_hardirqs_on+0xd/0x10 [ 246.996662] ? pwq_dec_nr_in_flight+0x450/0x450 [ 247.001362] ? __schedule+0x903/0x1ec0 [ 247.005263] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.010296] ? trace_hardirqs_off+0x10/0x10 [ 247.014632] ? retint_kernel+0x10/0x10 [ 247.018548] ? lock_acquire+0x1d5/0x580 [ 247.022528] ? lock_acquire+0x1d5/0x580 [ 247.026523] ? worker_thread+0x4a3/0x1990 [ 247.030682] ? lock_downgrade+0x980/0x980 [ 247.034845] ? lock_release+0xa40/0xa40 [ 247.038826] ? update_load_avg+0x2eb0/0x2eb0 [ 247.043264] ? do_raw_spin_trylock+0x190/0x190 [ 247.047871] worker_thread+0x223/0x1990 [ 247.051881] ? finish_task_switch+0x1c1/0x7e0 [ 247.056391] ? lock_downgrade+0x980/0x980 [ 247.060573] ? process_one_work+0x1bb0/0x1bb0 [ 247.065075] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.070110] ? trace_hardirqs_on+0xd/0x10 [ 247.074263] ? _raw_spin_unlock_irq+0x27/0x70 [ 247.078777] ? finish_task_switch+0x1c1/0x7e0 [ 247.083274] ? finish_task_switch+0x182/0x7e0 [ 247.087799] ? copy_overflow+0x20/0x20 [ 247.091706] ? __schedule+0x903/0x1ec0 [ 247.095620] ? trace_hardirqs_off+0x10/0x10 [ 247.099963] ? find_held_lock+0x35/0x1d0 [ 247.104052] ? find_held_lock+0x35/0x1d0 [ 247.108128] ? complete+0x62/0x80 [ 247.111605] ? __schedule+0x1ec0/0x1ec0 [ 247.115614] ? do_wait_intr_irq+0x3e0/0x3e0 [ 247.119949] ? __lockdep_init_map+0xe4/0x650 [ 247.124365] ? do_raw_spin_trylock+0x190/0x190 [ 247.128964] ? lockdep_init_map+0x9/0x10 [ 247.133053] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 247.138180] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.143202] ? trace_hardirqs_on+0xd/0x10 [ 247.147357] ? __kthread_parkme+0x176/0x240 [ 247.151679] kthread+0x33c/0x400 [ 247.155047] ? process_one_work+0x1bb0/0x1bb0 [ 247.159538] ? kthread_stop+0x7a0/0x7a0 [ 247.163524] ret_from_fork+0x3a/0x50 [ 247.167257] [ 247.167257] Showing all locks held in the system: [ 247.173596] 3 locks held by kworker/1:1/23: [ 247.178027] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<000000006331d0a2>] process_one_work+0xb12/0x1bb0 [ 247.189159] #1: ((reg_check_chans).work){+.+.}, at: [<000000000ee81609>] process_one_work+0xb89/0x1bb0 [ 247.198807] #2: (rtnl_mutex){+.+.}, at: [<0000000071b33009>] rtnl_lock+0x17/0x20 [ 247.206550] 2 locks held by khungtaskd/868: [ 247.210866] #0: (rcu_read_lock){....}, at: [<00000000f2dfa387>] watchdog+0x1c5/0xd60 [ 247.218946] #1: (tasklist_lock){.+.+}, at: [<0000000066aa294f>] debug_show_all_locks+0xd3/0x3d0 [ 247.227995] 3 locks held by kworker/1:3/2039: [ 247.232491] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<000000006331d0a2>] process_one_work+0xb12/0x1bb0 [ 247.243356] #1: ((addr_chk_work).work){+.+.}, at: [<000000000ee81609>] process_one_work+0xb89/0x1bb0 [ 247.252833] #2: (rtnl_mutex){+.+.}, at: [<0000000071b33009>] rtnl_lock+0x17/0x20 [ 247.260569] 1 lock held by rsyslogd/4358: [ 247.264730] #0: (&f->f_pos_lock){+.+.}, at: [<00000000a23fd36d>] __fdget_pos+0x12b/0x190 [ 247.273161] 2 locks held by getty/4448: [ 247.277131] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.285803] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.295098] 2 locks held by getty/4449: [ 247.299061] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.307737] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.317028] 2 locks held by getty/4450: [ 247.320996] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.329679] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.339047] 2 locks held by getty/4451: [ 247.343015] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.351689] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.360974] 2 locks held by getty/4452: [ 247.364947] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.373628] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.382932] 2 locks held by getty/4453: [ 247.386904] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.395595] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.404883] 2 locks held by getty/4454: [ 247.408854] #0: (&tty->ldisc_sem){++++}, at: [<00000000058b38d6>] ldsem_down_read+0x37/0x40 [ 247.417536] #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002fb7d582>] n_tty_read+0x2ef/0x1a40 [ 247.426840] 2 locks held by syz-executor5/4698: [ 247.431507] #0: (net_mutex){+.+.}, at: [<00000000f0508473>] copy_net_ns+0x1f5/0x580 [ 247.439513] #1: (rtnl_mutex){+.+.}, at: [<0000000071b33009>] rtnl_lock+0x17/0x20 [ 247.447332] 1 lock held by syz-executor3/4712: [ 247.451925] #0: (ipvs->sync_mutex){+.+.}, at: [<0000000043742e84>] do_ip_vs_set_ctl+0x277/0x1c90 [ 247.461056] 2 locks held by syz-executor3/4714: [ 247.465821] #0: (rtnl_mutex){+.+.}, at: [<0000000071b33009>] rtnl_lock+0x17/0x20 [ 247.473549] #1: (ipvs->sync_mutex){+.+.}, at: [<00000000017799ba>] start_sync_thread+0x140/0x2b30 [ 247.482765] 1 lock held by ipvs-b:2:0/4713: [ 247.487102] #0: (rtnl_mutex){+.+.}, at: [<0000000071b33009>] rtnl_lock+0x17/0x20 [ 247.494837] [ 247.496457] ============================================= [ 247.496457] [ 247.503486] NMI backtrace for cpu 0 [ 247.507115] CPU: 0 PID: 868 Comm: khungtaskd Not tainted 4.16.0-rc7+ #81 [ 247.513926] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 247.523253] Call Trace: [ 247.525877] dump_stack+0x194/0x24d [ 247.529484] ? arch_local_irq_restore+0x53/0x53 [ 247.534140] ? debug_show_all_locks+0x2f3/0x3d0 [ 247.538798] ? nmi_cpu_backtrace+0x1be/0x210 [ 247.543187] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 247.547659] nmi_cpu_backtrace+0x1d2/0x210 [ 247.551872] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 247.556343] nmi_trigger_cpumask_backtrace+0x123/0x180 [ 247.561596] arch_trigger_cpumask_backtrace+0x14/0x20 [ 247.566766] watchdog+0x90c/0xd60 [ 247.570201] ? reset_hung_task_detector+0xa0/0xa0 [ 247.575012] ? complete+0x62/0x80 [ 247.578442] ? __schedule+0x1ec0/0x1ec0 [ 247.582404] ? do_wait_intr_irq+0x3e0/0x3e0 [ 247.586711] ? __lockdep_init_map+0xe4/0x650 [ 247.591096] ? do_raw_spin_trylock+0x190/0x190 [ 247.595652] ? lockdep_init_map+0x9/0x10 [ 247.599694] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 247.604769] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.609756] ? trace_hardirqs_on+0xd/0x10 [ 247.613879] ? __kthread_parkme+0x176/0x240 [ 247.618174] kthread+0x33c/0x400 [ 247.621515] ? reset_hung_task_detector+0xa0/0xa0 [ 247.626333] ? kthread_stop+0x7a0/0x7a0 [ 247.630371] ret_from_fork+0x3a/0x50 [ 247.634206] Sending NMI from CPU 0 to CPUs 1: [ 247.638734] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 [ 247.639723] Kernel panic - not syncing: hung_task: blocked tasks [ 247.652407] CPU: 0 PID: 868 Comm: khungtaskd Not tainted 4.16.0-rc7+ #81 [ 247.659212] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 247.668537] Call Trace: [ 247.671099] dump_stack+0x194/0x24d [ 247.674703] ? arch_local_irq_restore+0x53/0x53 [ 247.679348] ? vsnprintf+0x1ed/0x1900 [ 247.683127] panic+0x1e4/0x41c [ 247.686295] ? refcount_error_report+0x214/0x214 [ 247.691039] ? nmi_trigger_cpumask_backtrace+0xf0/0x180 [ 247.696381] watchdog+0x91d/0xd60 [ 247.699817] ? reset_hung_task_detector+0xa0/0xa0 [ 247.704631] ? complete+0x62/0x80 [ 247.708065] ? __schedule+0x1ec0/0x1ec0 [ 247.712006] ? do_wait_intr_irq+0x3e0/0x3e0 [ 247.716298] ? __lockdep_init_map+0xe4/0x650 [ 247.720678] ? do_raw_spin_trylock+0x190/0x190 [ 247.725227] ? lockdep_init_map+0x9/0x10 [ 247.729265] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 247.734428] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.739424] ? trace_hardirqs_on+0xd/0x10 [ 247.743560] ? __kthread_parkme+0x176/0x240 [ 247.747855] kthread+0x33c/0x400 [ 247.751191] ? reset_hung_task_detector+0xa0/0xa0 [ 247.756000] ? kthread_stop+0x7a0/0x7a0 [ 247.759947] ret_from_fork+0x3a/0x50 [ 247.764359] Dumping ftrace buffer: [ 247.767989] (ftrace buffer empty) [ 247.771674] Kernel Offset: disabled [ 247.775280] Rebooting in 86400 seconds..