[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.247' (ECDSA) to the list of known hosts. syzkaller login: [ 852.858719][ T8505] IPVS: ftp: loaded support on port[0] = 21 [ 852.945842][ T121] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 852.961396][ T121] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program executing program [ 852.997385][ T8529] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 853.012682][ T121] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 853.020909][ T121] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 853.029209][ T8529] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1002.383895][ T1635] INFO: task kworker/1:2:3739 blocked for more than 143 seconds. [ 1002.391883][ T1635] Not tainted 5.11.0-rc5-syzkaller #0 [ 1002.401015][ T1635] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.410448][ T1635] task:kworker/1:2 state:D stack:26984 pid: 3739 ppid: 2 flags:0x00004000 [ 1002.420611][ T1635] Workqueue: events linkwatch_event [ 1002.426639][ T1635] Call Trace: [ 1002.429932][ T1635] __schedule+0x90c/0x21a0 [ 1002.435467][ T1635] ? io_schedule_timeout+0x140/0x140 [ 1002.440769][ T1635] ? _raw_spin_unlock_irq+0x1f/0x40 [ 1002.447443][ T1635] ? lockdep_hardirqs_on+0x79/0x100 [ 1002.452748][ T1635] schedule+0xcf/0x270 [ 1002.457893][ T1635] schedule_preempt_disabled+0xf/0x20 [ 1002.463289][ T1635] __mutex_lock+0x81a/0x1110 [ 1002.468929][ T1635] ? linkwatch_event+0xb/0x60 [ 1002.473633][ T1635] ? mutex_lock_io_nested+0xf60/0xf60 [ 1002.481028][ T1635] ? lock_release+0x710/0x710 [ 1002.486436][ T1635] linkwatch_event+0xb/0x60 [ 1002.490954][ T1635] process_one_work+0x98d/0x15f0 [ 1002.496900][ T1635] ? pwq_dec_nr_in_flight+0x320/0x320 [ 1002.502386][ T1635] ? rwlock_bug.part.0+0x90/0x90 [ 1002.508657][ T1635] ? _raw_spin_lock_irq+0x41/0x50 [ 1002.513712][ T1635] worker_thread+0x64c/0x1120 [ 1002.519381][ T1635] ? process_one_work+0x15f0/0x15f0 [ 1002.525247][ T1635] kthread+0x3b1/0x4a0 [ 1002.529327][ T1635] ? __kthread_bind_mask+0xc0/0xc0 [ 1002.535435][ T1635] ret_from_fork+0x1f/0x30 [ 1002.539959][ T1635] INFO: task kworker/0:3:3889 blocked for more than 143 seconds. [ 1002.548958][ T1635] Not tainted 5.11.0-rc5-syzkaller #0 [ 1002.556131][ T1635] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.565677][ T1635] task:kworker/0:3 state:D stack:28376 pid: 3889 ppid: 2 flags:0x00004000 [ 1002.575499][ T1635] Workqueue: events disconnect_work [ 1002.580801][ T1635] Call Trace: [ 1002.585010][ T1635] __schedule+0x90c/0x21a0 [ 1002.589451][ T1635] ? io_schedule_timeout+0x140/0x140 [ 1002.595633][ T1635] ? _raw_spin_unlock_irq+0x1f/0x40 [ 1002.600843][ T1635] ? lockdep_hardirqs_on+0x79/0x100 [ 1002.607880][ T1635] schedule+0xcf/0x270 [ 1002.612056][ T1635] schedule_preempt_disabled+0xf/0x20 [ 1002.618463][ T1635] __mutex_lock+0x81a/0x1110 [ 1002.623088][ T1635] ? disconnect_work+0x18/0x200 [ 1002.629029][ T1635] ? mutex_lock_io_nested+0xf60/0xf60 [ 1002.635500][ T1635] ? lock_downgrade+0x6d0/0x6d0 [ 1002.640380][ T1635] disconnect_work+0x18/0x200 [ 1002.646068][ T1635] process_one_work+0x98d/0x15f0 [ 1002.651180][ T1635] ? pwq_dec_nr_in_flight+0x320/0x320 [ 1002.658036][ T1635] ? rwlock_bug.part.0+0x90/0x90 [ 1002.663001][ T1635] ? _raw_spin_lock_irq+0x41/0x50 [ 1002.669167][ T1635] worker_thread+0x64c/0x1120 [ 1002.674549][ T1635] ? __kthread_parkme+0x13f/0x1e0 [ 1002.679591][ T1635] ? process_one_work+0x15f0/0x15f0 [ 1002.685872][ T1635] kthread+0x3b1/0x4a0 [ 1002.689961][ T1635] ? __kthread_bind_mask+0xc0/0xc0 [ 1002.696240][ T1635] ret_from_fork+0x1f/0x30 [ 1002.700776][ T1635] INFO: task kworker/1:1:8529 blocked for more than 143 seconds. [ 1002.709556][ T1635] Not tainted 5.11.0-rc5-syzkaller #0 [ 1002.716179][ T1635] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.725560][ T1635] task:kworker/1:1 state:D stack:27216 pid: 8529 ppid: 2 flags:0x00004000 [ 1002.736428][ T1635] Workqueue: ipv6_addrconf addrconf_dad_work [ 1002.742439][ T1635] Call Trace: [ 1002.746739][ T1635] __schedule+0x90c/0x21a0 [ 1002.751275][ T1635] ? io_schedule_timeout+0x140/0x140 [ 1002.757745][ T1635] ? _raw_spin_unlock_irq+0x1f/0x40 [ 1002.763065][ T1635] ? lockdep_hardirqs_on+0x79/0x100 [ 1002.769333][ T1635] schedule+0xcf/0x270 [ 1002.773409][ T1635] schedule_preempt_disabled+0xf/0x20 [ 1002.779657][ T1635] __mutex_lock+0x81a/0x1110 [ 1002.785400][ T1635] ? addrconf_dad_work+0xa3/0x1280 [ 1002.790533][ T1635] ? mutex_lock_io_nested+0xf60/0xf60 [ 1002.796846][ T1635] ? debug_object_deactivate+0x264/0x300 [ 1002.802594][ T1635] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 1002.809583][ T1635] addrconf_dad_work+0xa3/0x1280 [ 1002.815204][ T1635] ? addrconf_dad_completed+0xc60/0xc60 [ 1002.821041][ T1635] process_one_work+0x98d/0x15f0 [ 1002.827004][ T1635] ? pwq_dec_nr_in_flight+0x320/0x320 [ 1002.832412][ T1635] ? rwlock_bug.part.0+0x90/0x90 [ 1002.838354][ T1635] ? _raw_spin_lock_irq+0x41/0x50 [ 1002.843405][ T1635] worker_thread+0x64c/0x1120 [ 1002.849090][ T1635] ? __kthread_parkme+0x13f/0x1e0 [ 1002.854812][ T1635] ? process_one_work+0x15f0/0x15f0 [ 1002.860191][ T1635] kthread+0x3b1/0x4a0 [ 1002.866257][ T1635] ? __kthread_bind_mask+0xc0/0xc0 [ 1002.871393][ T1635] ret_from_fork+0x1f/0x30 [ 1002.876883][ T1635] [ 1002.876883][ T1635] Showing all locks held in the system: [ 1002.885382][ T1635] 1 lock held by khungtaskd/1635: [ 1002.890411][ T1635] #0: ffffffff8b373ce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1002.901355][ T1635] 3 locks held by kworker/1:2/3739: [ 1002.907686][ T1635] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 1002.918908][ T1635] #1: ffffc9000326fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 1002.930099][ T1635] #2: ffffffff8ca58b28 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 1002.939755][ T1635] 3 locks held by kworker/0:3/3889: [ 1002.945558][ T1635] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 1002.956880][ T1635] #1: ffffc900032afda8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 1002.968491][ T1635] #2: ffffffff8ca58b28 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0x18/0x200 [ 1002.978286][ T1635] 1 lock held by in:imklog/8176: [ 1002.983221][ T1635] #0: ffff888024c8b4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 1002.993432][ T1635] 3 locks held by kworker/1:1/8529: [ 1003.000093][ T1635] #0: ffff888020fc6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 1003.011676][ T1635] #1: ffffc9000179fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 1003.024673][ T1635] #2: ffffffff8ca58b28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1280 [ 1003.034890][ T1635] 3 locks held by syz-executor495/8549: [ 1003.040478][ T1635] [ 1003.042793][ T1635] ============================================= [ 1003.042793][ T1635] [ 1003.053527][ T1635] NMI backtrace for cpu 1 [ 1003.058033][ T1635] CPU: 1 PID: 1635 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 1003.066372][ T1635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.076697][ T1635] Call Trace: [ 1003.080077][ T1635] dump_stack+0x107/0x163 [ 1003.084410][ T1635] nmi_cpu_backtrace.cold+0x44/0xd7 [ 1003.089609][ T1635] ? lapic_can_unplug_cpu+0x80/0x80 [ 1003.094807][ T1635] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 1003.100795][ T1635] watchdog+0xd43/0xfa0 [ 1003.104957][ T1635] ? reset_hung_task_detector+0x30/0x30 [ 1003.110505][ T1635] kthread+0x3b1/0x4a0 [ 1003.114576][ T1635] ? __kthread_bind_mask+0xc0/0xc0 [ 1003.119695][ T1635] ret_from_fork+0x1f/0x30 [ 1003.124207][ T1635] Sending NMI from CPU 1 to CPUs 0: [ 1003.130069][ C0] NMI backtrace for cpu 0 [ 1003.130079][ C0] CPU: 0 PID: 8549 Comm: syz-executor495 Not tainted 5.11.0-rc5-syzkaller #0 [ 1003.130086][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.130093][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 [ 1003.130102][ C0] Code: 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 00 fd ff ff 66 0f 1f 84 00 00 00 00 00 65 8b 05 69 2e 8f 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9 00 01 ff 00 74 0e [ 1003.130113][ C0] RSP: 0018:ffffc9000161f2d8 EFLAGS: 00000212 [ 1003.130123][ C0] RAX: 0000000080000000 RBX: ffff88801687cbc0 RCX: 0000000080000000 [ 1003.130130][ C0] RDX: ffff8880191ab780 RSI: ffffffff885baf0d RDI: ffff88801687d518 [ 1003.130136][ C0] RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 [ 1003.130142][ C0] R10: ffffffff885baf3a R11: 0000000000000000 R12: 0000000000000000 [ 1003.130149][ C0] R13: ffff88801cd13420 R14: dffffc0000000000 R15: 0000000000000000 [ 1003.130155][ C0] FS: 0000000001be0880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 1003.130162][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1003.130168][ C0] CR2: 00007f1d10947000 CR3: 0000000012f0a000 CR4: 0000000000350ef0 [ 1003.130173][ C0] Call Trace: [ 1003.130176][ C0] ieee80211_chanctx_radar_detect+0x23d/0x420 [ 1003.130181][ C0] ieee80211_check_combinations+0x3b9/0x890 [ 1003.130186][ C0] ? ieee80211_recalc_dtim+0x240/0x240 [ 1003.130190][ C0] ieee80211_check_concurrent_iface+0x454/0x620 [ 1003.130195][ C0] ieee80211_if_change_type+0x288/0x620 [ 1003.130200][ C0] ieee80211_change_iface+0x26/0x210 [ 1003.130204][ C0] cfg80211_change_iface+0x307/0xf10 [ 1003.130208][ C0] nl80211_set_interface+0x65c/0x8d0 [ 1003.130213][ C0] ? nl80211_notify_iface+0x180/0x180 [ 1003.130217][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 1003.130222][ C0] ? nl80211_pre_doit+0xa2/0x630 [ 1003.130226][ C0] genl_family_rcv_msg_doit+0x228/0x320 [ 1003.130231][ C0] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x280/0x280 [ 1003.130237][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 1003.130242][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 1003.130247][ C0] ? ns_capable+0xde/0x100 [ 1003.130250][ C0] genl_rcv_msg+0x328/0x580 [ 1003.130254][ C0] ? genl_get_cmd+0x480/0x480 [ 1003.130258][ C0] ? nl80211_notify_iface+0x180/0x180 [ 1003.130262][ C0] ? lock_release+0x710/0x710 [ 1003.130266][ C0] netlink_rcv_skb+0x153/0x420 [ 1003.130270][ C0] ? genl_get_cmd+0x480/0x480 [ 1003.130274][ C0] ? netlink_ack+0xaa0/0xaa0 [ 1003.130278][ C0] genl_rcv+0x24/0x40 [ 1003.130281][ C0] netlink_unicast+0x533/0x7d0 [ 1003.130285][ C0] ? netlink_attachskb+0x870/0x870 [ 1003.130290][ C0] ? _copy_from_iter_full+0x275/0x850 [ 1003.130294][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 1003.130299][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 1003.130303][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 1003.130308][ C0] ? __check_object_size+0x171/0x3f0 [ 1003.130312][ C0] netlink_sendmsg+0x856/0xd90 [ 1003.130321][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1003.130325][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 1003.130330][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 1003.130334][ C0] sock_sendmsg+0xcf/0x120 [ 1003.130338][ C0] ____sys_sendmsg+0x6e8/0x810 [ 1003.130342][ C0] ? kernel_sendmsg+0x50/0x50 [ 1003.130345][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 1003.130349][ C0] ? find_held_lock+0x2d/0x110 [ 1003.130353][ C0] ___sys_sendmsg+0xf3/0x170 [ 1003.130357][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 1003.130361][ C0] ? _copy_to_user+0xdc/0x150 [ 1003.130366][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 1003.130370][ C0] ? sock_do_ioctl+0x168/0x2d0 [ 1003.130374][ C0] ? compat_ifr_data_ioctl+0x150/0x150 [ 1003.130379][ C0] ? __sanitizer_cov_trace_switch+0x63/0xf0 [ 1003.130384][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 1003.130389][ C0] ? __fget_light+0x215/0x280 [ 1003.130393][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 1003.130398][ C0] __sys_sendmsg+0xe5/0x1b0 [ 1003.130401][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1003.130406][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 1003.130410][ C0] do_syscall_64+0x2d/0x70 [ 1003.130414][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1003.130419][ C0] RIP: 0033:0x442209 [ 1003.130426][ C0] 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 [ 1003.130437][ C0] RSP: 002b:00007fff0c345c28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1003.130447][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442209 [ 1003.130453][ C0] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 1003.130459][ C0] RBP: 000000306e616c77 R08: 0000002100000000 R09: 0000002100000000 [ 1003.130465][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000d042b [ 1003.130471][ C0] R13: 0000000000000000 R14: 000000000000000c R15: 0000000000000004 [ 1003.131684][ T1635] Kernel panic - not syncing: hung_task: blocked tasks [ 1003.619768][ T1635] CPU: 1 PID: 1635 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 1003.628099][ T1635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.638245][ T1635] Call Trace: [ 1003.641525][ T1635] dump_stack+0x107/0x163 [ 1003.645879][ T1635] panic+0x306/0x73d [ 1003.649788][ T1635] ? __warn_printk+0xf3/0xf3 [ 1003.654377][ T1635] ? lapic_can_unplug_cpu+0x80/0x80 [ 1003.659573][ T1635] ? preempt_schedule_thunk+0x16/0x18 [ 1003.664940][ T1635] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 1003.671096][ T1635] ? watchdog.cold+0x5/0x158 [ 1003.675689][ T1635] watchdog.cold+0x16/0x158 [ 1003.680194][ T1635] ? reset_hung_task_detector+0x30/0x30 [ 1003.685739][ T1635] kthread+0x3b1/0x4a0 [ 1003.689800][ T1635] ? __kthread_bind_mask+0xc0/0xc0 [ 1003.694905][ T1635] ret_from_fork+0x1f/0x30 [ 1003.702980][ T1635] Kernel Offset: disabled [ 1003.707504][ T1635] Rebooting in 86400 seconds..