[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts. syzkaller login: [ 837.358578][ T6845] IPVS: ftp: loaded support on port[0] = 21 [ 837.424822][ T265] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 837.432747][ T265] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program executing program [ 837.489389][ T6837] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 837.509333][ T265] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 837.517600][ T265] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 837.527415][ T6837] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 984.805705][ T1176] INFO: task kworker/0:0:5 blocked for more than 143 seconds. [ 984.813266][ T1176] Not tainted 5.9.0-rc8-syzkaller #0 [ 984.821833][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 984.832268][ T1176] task:kworker/0:0 state:D stack:26544 pid: 5 ppid: 2 flags:0x00004000 [ 984.842393][ T1176] Workqueue: ipv6_addrconf addrconf_dad_work [ 984.849176][ T1176] Call Trace: [ 984.852523][ T1176] __schedule+0xec9/0x2280 [ 984.857983][ T1176] ? io_schedule_timeout+0x140/0x140 [ 984.863363][ T1176] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 984.870448][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 984.876379][ T1176] ? lockdep_hardirqs_on+0x53/0x100 [ 984.881585][ T1176] schedule+0xd0/0x2a0 [ 984.886725][ T1176] schedule_preempt_disabled+0xf/0x20 [ 984.892095][ T1176] __mutex_lock+0x3e2/0x10e0 [ 984.897753][ T1176] ? addrconf_dad_work+0xa3/0x1280 [ 984.903029][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 984.909522][ T1176] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 984.915512][ T1176] ? lock_acquire+0x1f3/0xaf0 [ 984.921360][ T1176] ? process_one_work+0x85f/0x1670 [ 984.927343][ T1176] addrconf_dad_work+0xa3/0x1280 [ 984.932279][ T1176] ? addrconf_dad_completed+0xcd0/0xcd0 [ 984.938861][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 984.944058][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 984.950089][ T1176] process_one_work+0x94c/0x1670 [ 984.955034][ T1176] ? lock_release+0x8f0/0x8f0 [ 984.961749][ T1176] ? pwq_dec_nr_in_flight+0x320/0x320 [ 984.967835][ T1176] ? rwlock_bug.part.0+0x90/0x90 [ 984.972773][ T1176] ? lockdep_hardirqs_off+0x96/0xd0 [ 984.978994][ T1176] worker_thread+0x64c/0x1120 [ 984.983685][ T1176] ? process_one_work+0x1670/0x1670 [ 984.989933][ T1176] kthread+0x3b5/0x4a0 [ 984.994005][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 985.000380][ T1176] ret_from_fork+0x1f/0x30 [ 985.005069][ T1176] INFO: task kworker/1:3:2661 blocked for more than 143 seconds. [ 985.013943][ T1176] Not tainted 5.9.0-rc8-syzkaller #0 [ 985.020860][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 985.031201][ T1176] task:kworker/1:3 state:D stack:26824 pid: 2661 ppid: 2 flags:0x00004000 [ 985.041143][ T1176] Workqueue: events linkwatch_event [ 985.047253][ T1176] Call Trace: [ 985.050563][ T1176] __schedule+0xec9/0x2280 [ 985.054979][ T1176] ? io_schedule_timeout+0x140/0x140 [ 985.061700][ T1176] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 985.068356][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 985.073563][ T1176] ? lockdep_hardirqs_on+0x53/0x100 [ 985.080011][ T1176] schedule+0xd0/0x2a0 [ 985.084088][ T1176] schedule_preempt_disabled+0xf/0x20 [ 985.091508][ T1176] __mutex_lock+0x3e2/0x10e0 [ 985.096772][ T1176] ? linkwatch_event+0xb/0x60 [ 985.101454][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 985.108011][ T1176] ? process_one_work+0x85f/0x1670 [ 985.113132][ T1176] ? lock_release+0x8f0/0x8f0 [ 985.118830][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 985.124029][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 985.130216][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 985.135157][ T1176] linkwatch_event+0xb/0x60 [ 985.140899][ T1176] process_one_work+0x94c/0x1670 [ 985.146485][ T1176] ? lock_release+0x8f0/0x8f0 [ 985.151168][ T1176] ? pwq_dec_nr_in_flight+0x320/0x320 [ 985.157573][ T1176] ? rwlock_bug.part.0+0x90/0x90 [ 985.162509][ T1176] ? lockdep_hardirqs_off+0x96/0xd0 [ 985.168740][ T1176] worker_thread+0x64c/0x1120 [ 985.173428][ T1176] ? __kthread_parkme+0x13f/0x1e0 [ 985.179463][ T1176] ? process_one_work+0x1670/0x1670 [ 985.184663][ T1176] kthread+0x3b5/0x4a0 [ 985.189716][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 985.194831][ T1176] ret_from_fork+0x1f/0x30 [ 985.200389][ T1176] INFO: task kworker/0:1:6837 blocked for more than 143 seconds. [ 985.208989][ T1176] Not tainted 5.9.0-rc8-syzkaller #0 [ 985.214786][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 985.225642][ T1176] task:kworker/0:1 state:D stack:27232 pid: 6837 ppid: 2 flags:0x00004000 [ 985.234962][ T1176] Workqueue: events disconnect_work [ 985.241280][ T1176] Call Trace: [ 985.244582][ T1176] __schedule+0xec9/0x2280 [ 985.250969][ T1176] ? io_schedule_timeout+0x140/0x140 [ 985.256894][ T1176] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 985.262876][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 985.269141][ T1176] ? lockdep_hardirqs_on+0x53/0x100 [ 985.274345][ T1176] schedule+0xd0/0x2a0 [ 985.279633][ T1176] schedule_preempt_disabled+0xf/0x20 [ 985.285119][ T1176] __mutex_lock+0x3e2/0x10e0 [ 985.290733][ T1176] ? disconnect_work+0x18/0x200 [ 985.296267][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 985.301643][ T1176] ? lock_acquire+0x1f3/0xaf0 [ 985.307342][ T1176] ? process_one_work+0x85f/0x1670 [ 985.312618][ T1176] ? lock_downgrade+0x830/0x830 [ 985.318490][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 985.323692][ T1176] disconnect_work+0x18/0x200 [ 985.329385][ T1176] process_one_work+0x94c/0x1670 [ 985.334330][ T1176] ? lock_release+0x8f0/0x8f0 [ 985.340146][ T1176] ? pwq_dec_nr_in_flight+0x320/0x320 [ 985.347470][ T1176] ? rwlock_bug.part.0+0x90/0x90 [ 985.352407][ T1176] ? lockdep_hardirqs_off+0x96/0xd0 [ 985.358659][ T1176] worker_thread+0x64c/0x1120 [ 985.363347][ T1176] ? __kthread_parkme+0x13f/0x1e0 [ 985.369703][ T1176] ? process_one_work+0x1670/0x1670 [ 985.374906][ T1176] kthread+0x3b5/0x4a0 [ 985.380000][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 985.385113][ T1176] ret_from_fork+0x1f/0x30 [ 985.390560][ T1176] [ 985.390560][ T1176] Showing all locks held in the system: [ 985.399028][ T1176] 3 locks held by kworker/0:0/5: [ 985.403956][ T1176] #0: ffff888214d8c138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 985.416945][ T1176] #1: ffffc90000cbfda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 985.429791][ T1176] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1280 [ 985.439832][ T1176] 1 lock held by khungtaskd/1176: [ 985.444855][ T1176] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 985.455747][ T1176] 3 locks held by kworker/1:3/2661: [ 985.460979][ T1176] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 985.473404][ T1176] #1: ffffc9000869fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 985.485461][ T1176] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 985.495078][ T1176] 1 lock held by in:imklog/6758: [ 985.500661][ T1176] #0: ffff8880a81b68b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 985.510529][ T1176] 3 locks held by kworker/0:1/6837: [ 985.516527][ T1176] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 985.527514][ T1176] #1: ffffc900056b7da8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 985.538769][ T1176] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0x18/0x200 [ 985.548612][ T1176] 3 locks held by syz-executor335/6887: [ 985.554170][ T1176] [ 985.558254][ T1176] ============================================= [ 985.558254][ T1176] [ 985.567624][ T1176] NMI backtrace for cpu 0 [ 985.571953][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 985.580172][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 985.590208][ T1176] Call Trace: [ 985.593591][ T1176] dump_stack+0x198/0x1fd [ 985.597920][ T1176] nmi_cpu_backtrace.cold+0x70/0xb1 [ 985.603164][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 985.608810][ T1176] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 985.614839][ T1176] watchdog+0xd7d/0x1000 [ 985.619078][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 985.624613][ T1176] kthread+0x3b5/0x4a0 [ 985.628672][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 985.633783][ T1176] ret_from_fork+0x1f/0x30 [ 985.638448][ T1176] Sending NMI from CPU 0 to CPUs 1: [ 985.644712][ C1] NMI backtrace for cpu 1 [ 985.644718][ C1] CPU: 1 PID: 6887 Comm: syz-executor335 Not tainted 5.9.0-rc8-syzkaller #0 [ 985.644725][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 985.644729][ C1] RIP: 0010:ieee80211_chanctx_radar_detect+0x284/0x3a0 [ 985.644742][ C1] Code: e4 98 f9 48 8d bb 58 09 00 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 e4 00 00 00 48 8b 83 58 09 00 00 48 8d 98 a8 f6 ff ff <49> 39 c5 0f 85 5f ff ff ff e8 2e e4 98 f9 44 89 e0 48 83 c4 08 5b [ 985.644746][ C1] RSP: 0018:ffffc90000ef72e0 EFLAGS: 00000246 [ 985.644754][ C1] RAX: ffff888094a8d558 RBX: ffff888094a8cc00 RCX: ffffffff87dda35e [ 985.644759][ C1] RDX: ffff8880a8eb0000 RSI: ffffffff87dda39d RDI: ffff888094a8d558 [ 985.644764][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88808db9296f [ 985.644769][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 985.644774][ C1] R13: ffff88809ed4b520 R14: dffffc0000000000 R15: 0000000000000000 [ 985.644780][ C1] FS: 000000000126d880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 985.644784][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 985.644790][ C1] CR2: 00007fbb9b299000 CR3: 00000000a29cd000 CR4: 00000000001506e0 [ 985.644795][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 985.644800][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 985.644803][ C1] Call Trace: [ 985.644807][ C1] ieee80211_check_combinations+0x3b9/0x880 [ 985.644811][ C1] ? ieee80211_recalc_dtim+0x230/0x230 [ 985.644814][ C1] ? lock_is_held_type+0xbb/0xf0 [ 985.644818][ C1] ieee80211_check_concurrent_iface+0x45b/0x670 [ 985.644822][ C1] ieee80211_if_change_type+0x288/0x620 [ 985.644826][ C1] ieee80211_change_iface+0x26/0x210 [ 985.644831][ C1] cfg80211_change_iface+0x2ec/0xfe0 [ 985.644835][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 985.644838][ C1] nl80211_set_interface+0x65c/0x8d0 [ 985.644842][ C1] ? nl80211_notify_iface+0x180/0x180 [ 985.644846][ C1] ? nl80211_pre_doit+0xa2/0x630 [ 985.644850][ C1] genl_family_rcv_msg_doit+0x228/0x320 [ 985.644854][ C1] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x280/0x280 [ 985.644858][ C1] ? ns_capable+0xde/0x100 [ 985.644861][ C1] genl_rcv_msg+0x328/0x580 [ 985.644864][ C1] ? genl_get_cmd+0x480/0x480 [ 985.644868][ C1] ? lock_acquire+0x1f3/0xaf0 [ 985.644871][ C1] ? nl80211_notify_iface+0x180/0x180 [ 985.644875][ C1] ? lock_release+0x8f0/0x8f0 [ 985.644878][ C1] netlink_rcv_skb+0x15a/0x430 [ 985.644881][ C1] ? genl_get_cmd+0x480/0x480 [ 985.644885][ C1] ? netlink_ack+0xa10/0xa10 [ 985.644889][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 985.644892][ C1] genl_rcv+0x24/0x40 [ 985.644895][ C1] netlink_unicast+0x533/0x7d0 [ 985.644899][ C1] ? netlink_attachskb+0x810/0x810 [ 985.644902][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 985.644906][ C1] ? __check_object_size+0x171/0x3e4 [ 985.644909][ C1] netlink_sendmsg+0x856/0xd90 [ 985.644913][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 985.644917][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 985.644920][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 985.644923][ C1] sock_sendmsg+0xcf/0x120 [ 985.644927][ C1] ____sys_sendmsg+0x6e8/0x810 [ 985.644930][ C1] ? kernel_sendmsg+0x50/0x50 [ 985.644933][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 985.644937][ C1] ? lock_is_held_type+0xbb/0xf0 [ 985.644940][ C1] ? find_held_lock+0x2d/0x110 [ 985.644943][ C1] ? __might_fault+0x11f/0x1d0 [ 985.644947][ C1] ___sys_sendmsg+0xf3/0x170 [ 985.644951][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 985.644954][ C1] ? __might_fault+0x190/0x1d0 [ 985.644957][ C1] ? _copy_to_user+0x126/0x160 [ 985.644961][ C1] ? sock_do_ioctl+0x168/0x2d0 [ 985.644965][ C1] ? compat_ifr_data_ioctl+0x150/0x150 [ 985.644969][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 985.644972][ C1] ? __fget_light+0x215/0x280 [ 985.644975][ C1] __sys_sendmsg+0xe5/0x1b0 [ 985.644979][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 985.644982][ C1] ? lock_is_held_type+0xbb/0xf0 [ 985.644986][ C1] ? check_preemption_disabled+0x50/0x130 [ 985.644990][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 985.644993][ C1] do_syscall_64+0x2d/0x70 [ 985.644997][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 985.645000][ C1] RIP: 0033:0x442209 [ 985.645012][ C1] Code: e8 ac 00 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 985.645016][ C1] RSP: 002b:00007ffd190e3de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 985.645025][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442209 [ 985.645030][ C1] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 985.645035][ C1] RBP: 000000306e616c77 R08: 0000002000000000 R09: 0000002000000000 [ 985.645041][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000cc7ec [ 985.645046][ C1] R13: 0000000000000000 R14: 000000000000000c R15: 0000000000000004 [ 985.645052][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 985.665519][ T1176] Kernel panic - not syncing: hung_task: blocked tasks [ 986.143564][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 986.151784][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 986.161828][ T1176] Call Trace: [ 986.165112][ T1176] dump_stack+0x198/0x1fd [ 986.169443][ T1176] panic+0x382/0x7fb [ 986.173334][ T1176] ? __warn_printk+0xf3/0xf3 [ 986.177917][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 986.183535][ T1176] ? preempt_schedule_thunk+0x16/0x18 [ 986.188898][ T1176] ? watchdog.cold+0x5/0x16b [ 986.193475][ T1176] ? watchdog+0xa82/0x1000 [ 986.197882][ T1176] watchdog.cold+0x16/0x16b [ 986.202377][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 986.207911][ T1176] kthread+0x3b5/0x4a0 [ 986.211965][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 986.217082][ T1176] ret_from_fork+0x1f/0x30 [ 986.222991][ T1176] Kernel Offset: disabled [ 986.227317][ T1176] Rebooting in 86400 seconds..