Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. [ 1041.381709] IPVS: ftp: loaded support on port[0] = 21 [ 1041.440348] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1041.448752] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1041.463664] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program executing program [ 1041.488176] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 1041.495430] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1041.502328] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1041.509431] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1041.517648] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1288.029186] INFO: task kworker/0:1:24 blocked for more than 140 seconds. [ 1288.036226] Not tainted 4.14.204-syzkaller #0 [ 1288.042891] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.051478] kworker/0:1 D28288 24 2 0x80000000 [ 1288.057286] Workqueue: ipv6_addrconf addrconf_verify_work [ 1288.063873] Call Trace: [ 1288.066488] __schedule+0x88b/0x1de0 [ 1288.071201] ? io_schedule_timeout+0x140/0x140 [ 1288.075832] ? lock_downgrade+0x740/0x740 [ 1288.080988] schedule+0x8d/0x1b0 [ 1288.084350] schedule_preempt_disabled+0xf/0x20 [ 1288.089007] __mutex_lock+0x669/0x1310 [ 1288.094282] ? lock_downgrade+0x680/0x740 [ 1288.098426] ? addrconf_verify_work+0xa/0x20 [ 1288.103829] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.109946] ? process_one_work+0x6c4/0x14a0 [ 1288.114361] addrconf_verify_work+0xa/0x20 [ 1288.118582] process_one_work+0x793/0x14a0 [ 1288.124253] ? work_busy+0x320/0x320 [ 1288.127961] ? worker_thread+0x158/0xff0 [ 1288.132990] ? _raw_spin_unlock_irq+0x24/0x80 [ 1288.137479] worker_thread+0x5cc/0xff0 [ 1288.143130] ? rescuer_thread+0xc80/0xc80 [ 1288.147273] kthread+0x30d/0x420 [ 1288.151572] ? kthread_create_on_node+0xd0/0xd0 [ 1288.156239] ret_from_fork+0x24/0x30 [ 1288.160987] INFO: task kworker/1:2:3437 blocked for more than 140 seconds. [ 1288.167987] Not tainted 4.14.204-syzkaller #0 [ 1288.174027] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.182566] kworker/1:2 D27048 3437 2 0x80000000 [ 1288.188256] Workqueue: events disconnect_work [ 1288.193972] Call Trace: [ 1288.196557] __schedule+0x88b/0x1de0 [ 1288.201258] ? save_trace+0xd6/0x290 [ 1288.204969] ? io_schedule_timeout+0x140/0x140 [ 1288.210507] ? lock_downgrade+0x740/0x740 [ 1288.214657] schedule+0x8d/0x1b0 [ 1288.218008] schedule_preempt_disabled+0xf/0x20 [ 1288.224050] __mutex_lock+0x669/0x1310 [ 1288.227933] ? trace_hardirqs_on+0x10/0x10 [ 1288.233109] ? disconnect_work+0x14/0x1d0 [ 1288.237255] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.243688] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1288.248785] ? process_one_work+0x6c4/0x14a0 [ 1288.254130] ? lock_acquire+0x170/0x3f0 [ 1288.258101] disconnect_work+0x14/0x1d0 [ 1288.263065] process_one_work+0x793/0x14a0 [ 1288.267295] ? work_busy+0x320/0x320 [ 1288.271947] ? worker_thread+0x158/0xff0 [ 1288.276001] ? _raw_spin_unlock_irq+0x24/0x80 [ 1288.281484] worker_thread+0x5cc/0xff0 [ 1288.285369] ? rescuer_thread+0xc80/0xc80 [ 1288.290446] kthread+0x30d/0x420 [ 1288.293910] ? kthread_create_on_node+0xd0/0xd0 [ 1288.298690] ret_from_fork+0x24/0x30 [ 1288.303827] INFO: task kworker/1:1:7982 blocked for more than 140 seconds. [ 1288.311444] Not tainted 4.14.204-syzkaller #0 [ 1288.316444] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.325385] kworker/1:1 D30024 7982 2 0x80000000 [ 1288.332933] Workqueue: ipv6_addrconf addrconf_dad_work [ 1288.338206] Call Trace: [ 1288.341833] __schedule+0x88b/0x1de0 [ 1288.345550] ? io_schedule_timeout+0x140/0x140 [ 1288.351089] ? lock_downgrade+0x740/0x740 [ 1288.355231] schedule+0x8d/0x1b0 [ 1288.358582] schedule_preempt_disabled+0xf/0x20 [ 1288.364549] __mutex_lock+0x669/0x1310 [ 1288.368434] ? addrconf_dad_work+0x89/0xef0 [ 1288.373728] ? debug_object_deactivate+0x1da/0x2e0 [ 1288.378654] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.385132] ? lock_acquire+0x170/0x3f0 [ 1288.389713] ? lock_downgrade+0x740/0x740 [ 1288.393856] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1288.398951] addrconf_dad_work+0x89/0xef0 [ 1288.404482] ? lock_acquire+0x170/0x3f0 [ 1288.408460] ? addrconf_dad_completed+0xa40/0xa40 [ 1288.414353] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1288.420409] process_one_work+0x793/0x14a0 [ 1288.424643] ? work_busy+0x320/0x320 [ 1288.428340] ? worker_thread+0x158/0xff0 [ 1288.433783] ? _raw_spin_unlock_irq+0x24/0x80 [ 1288.438365] worker_thread+0x5cc/0xff0 [ 1288.443262] ? rescuer_thread+0xc80/0xc80 [ 1288.447403] kthread+0x30d/0x420 [ 1288.451695] ? kthread_create_on_node+0xd0/0xd0 [ 1288.456358] ret_from_fork+0x24/0x30 [ 1288.461102] INFO: task kworker/1:3:8033 blocked for more than 140 seconds. [ 1288.468107] Not tainted 4.14.204-syzkaller #0 [ 1288.474084] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.482660] kworker/1:3 D30208 8033 2 0x80000000 [ 1288.488389] Workqueue: events linkwatch_event [ 1288.494187] Call Trace: [ 1288.496773] __schedule+0x88b/0x1de0 [ 1288.501501] ? io_schedule_timeout+0x140/0x140 [ 1288.506078] ? lock_downgrade+0x740/0x740 [ 1288.511924] schedule+0x8d/0x1b0 [ 1288.515287] schedule_preempt_disabled+0xf/0x20 [ 1288.520894] __mutex_lock+0x669/0x1310 [ 1288.524777] ? lock_downgrade+0x680/0x740 [ 1288.528912] ? linkwatch_event+0xa/0x50 [ 1288.534188] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.540237] ? process_one_work+0x6c4/0x14a0 [ 1288.544650] linkwatch_event+0xa/0x50 [ 1288.548436] process_one_work+0x793/0x14a0 [ 1288.554059] ? work_busy+0x320/0x320 [ 1288.557764] ? worker_thread+0x158/0xff0 [ 1288.562866] ? _raw_spin_unlock_irq+0x24/0x80 [ 1288.567359] worker_thread+0x5cc/0xff0 [ 1288.572211] ? rescuer_thread+0xc80/0xc80 [ 1288.576352] kthread+0x30d/0x420 [ 1288.580685] ? kthread_create_on_node+0xd0/0xd0 [ 1288.585362] ret_from_fork+0x24/0x30 [ 1288.590214] [ 1288.590214] Showing all locks held in the system: [ 1288.596537] 3 locks held by kworker/0:1/24: [ 1288.601003] #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6b0/0x14a0 [ 1288.610642] #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 [ 1288.620127] #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 [ 1288.629132] 1 lock held by khungtaskd/1531: [ 1288.633437] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1288.642507] 3 locks held by kworker/1:2/3437: [ 1288.646987] #0: ("events"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 [ 1288.655436] #1: (cfg80211_disconnect_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 [ 1288.665266] #2: (rtnl_mutex){+.+.}, at: [] disconnect_work+0x14/0x1d0 [ 1288.673637] 3 locks held by kworker/1:1/7982: [ 1288.678115] #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6b0/0x14a0 [ 1288.687688] #1: ((&(&ifa->dad_work)->work)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 [ 1288.697631] #2: (rtnl_mutex){+.+.}, at: [] addrconf_dad_work+0x89/0xef0 [ 1288.706157] 3 locks held by kworker/1:3/8033: [ 1288.710672] #0: ("events"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 [ 1288.719113] #1: ((linkwatch_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 [ 1288.728654] #2: (rtnl_mutex){+.+.}, at: [] linkwatch_event+0xa/0x50 [ 1288.736834] [ 1288.738446] ============================================= [ 1288.738446] [ 1288.746239] NMI backtrace for cpu 0 [ 1288.749923] CPU: 0 PID: 1531 Comm: khungtaskd Not tainted 4.14.204-syzkaller #0 [ 1288.757442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1288.766788] Call Trace: [ 1288.769451] dump_stack+0x1b2/0x283 [ 1288.773104] nmi_cpu_backtrace.cold+0x57/0x93 [ 1288.777612] ? irq_force_complete_move.cold+0x89/0x89 [ 1288.782791] nmi_trigger_cpumask_backtrace+0x13a/0x17f [ 1288.788120] watchdog+0x5b9/0xb40 [ 1288.791565] ? hungtask_pm_notify+0x50/0x50 [ 1288.795873] kthread+0x30d/0x420 [ 1288.799229] ? kthread_create_on_node+0xd0/0xd0 [ 1288.803884] ret_from_fork+0x24/0x30 [ 1288.807667] Sending NMI from CPU 0 to CPUs 1: [ 1288.812572] NMI backtrace for cpu 1 [ 1288.812581] CPU: 1 PID: 8 Comm: rcu_preempt Not tainted 4.14.204-syzkaller #0 [ 1288.812585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1288.812588] task: ffff8880b5414200 task.stack: ffff8880b5418000 [ 1288.812590] RIP: 0010:__lock_acquire+0x6e5/0x3f20 [ 1288.812593] RSP: 0018:ffff8880b541fb80 EFLAGS: 00000046 [ 1288.812598] RAX: 0000000000000033 RBX: 0000000000000000 RCX: 1ffff11016a82950 [ 1288.812601] RDX: 0000000000000000 RSI: ffff8880b5414a88 RDI: ffffffff8b9d4cd0 [ 1288.812604] RBP: ffff8880b5414aaa R08: 0000000000000001 R09: 00000000000c0033 [ 1288.812607] R10: ffff8880b5414a88 R11: ffff8880b5414200 R12: ffff8880b5414aa0 [ 1288.812610] R13: 0000000000000001 R14: 0000000000000033 R15: ffffffff8beb4d40 [ 1288.812613] FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 1288.812616] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1288.812619] CR2: 00007f09d6c30000 CR3: 00000000a4cc9000 CR4: 00000000001406e0 [ 1288.812622] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1288.812625] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1288.812627] Call Trace: [ 1288.812629] ? lock_acquire+0x170/0x3f0 [ 1288.812631] ? trace_hardirqs_on+0x10/0x10 [ 1288.812633] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1288.812635] ? trace_hardirqs_on+0x10/0x10 [ 1288.812638] ? prepare_to_swait+0x115/0x2a0 [ 1288.812640] ? lock_acquire+0x170/0x3f0 [ 1288.812642] ? lock_downgrade+0x740/0x740 [ 1288.812644] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1288.812646] ? rcu_gp_kthread+0xc50/0x1e60 [ 1288.812648] lock_acquire+0x170/0x3f0 [ 1288.812650] ? rcu_gp_kthread+0x1050/0x1e60 [ 1288.812652] _raw_spin_lock_irq+0x5b/0x80 [ 1288.812654] ? rcu_gp_kthread+0x1050/0x1e60 [ 1288.812656] rcu_gp_kthread+0x1050/0x1e60 [ 1288.812658] ? force_qs_rnp+0x4f0/0x4f0 [ 1288.812660] ? force_qs_rnp+0x4f0/0x4f0 [ 1288.812662] kthread+0x30d/0x420 [ 1288.812664] ? kthread_create_on_node+0xd0/0xd0 [ 1288.812666] ret_from_fork+0x24/0x30 [ 1288.812667] Code: 24 18 49 89 1a 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e 0f 25 00 00 41 8b 93 80 08 00 00 <85> d2 74 75 48 8b 74 24 10 48 8d 14 92 48 8d 6c d6 d8 48 ba 00 [ 1288.813376] Kernel panic - not syncing: hung_task: blocked tasks [ 1289.035705] CPU: 0 PID: 1531 Comm: khungtaskd Not tainted 4.14.204-syzkaller #0 [ 1289.043134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1289.052478] Call Trace: [ 1289.055060] dump_stack+0x1b2/0x283 [ 1289.058757] panic+0x1f9/0x42d [ 1289.061937] ? add_taint.cold+0x16/0x16 [ 1289.065922] watchdog+0x5ca/0xb40 [ 1289.069362] ? hungtask_pm_notify+0x50/0x50 [ 1289.073669] kthread+0x30d/0x420 [ 1289.077020] ? kthread_create_on_node+0xd0/0xd0 [ 1289.081676] ret_from_fork+0x24/0x30 [ 1289.086262] Kernel Offset: disabled [ 1289.089876] Rebooting in 86400 seconds..