[ 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 '10.128.15.203' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 485.338736][ T8503] IPVS: ftp: loaded support on port[0] = 21 [ 721.592206][ T1658] INFO: task kworker/u4:3:131 blocked for more than 143 seconds. [ 721.600120][ T1658] Not tainted 5.10.0-rc5-syzkaller #0 [ 721.608972][ T1658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.618784][ T1658] task:kworker/u4:3 state:D stack:23600 pid: 131 ppid: 2 flags:0x00004000 [ 721.632714][ T1658] Workqueue: tc_filter_workqueue tcindex_partial_destroy_work [ 721.640207][ T1658] Call Trace: [ 721.645296][ T1658] __schedule+0x893/0x2130 [ 721.649746][ T1658] ? io_schedule_timeout+0x140/0x140 [ 721.656521][ T1658] schedule+0xcf/0x270 [ 721.660623][ T1658] schedule_preempt_disabled+0xf/0x20 [ 721.668130][ T1658] __mutex_lock+0x3e2/0x10e0 [ 721.673672][ T1658] ? tcindex_partial_destroy_work+0x13/0x50 [ 721.679601][ T1658] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.686497][ T1658] ? lock_release+0x710/0x710 [ 721.691222][ T1658] tcindex_partial_destroy_work+0x13/0x50 [ 721.699682][ T1658] process_one_work+0x933/0x15a0 [ 721.705795][ T1658] ? lock_release+0x710/0x710 [ 721.710501][ T1658] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.717366][ T1658] ? rwlock_bug.part.0+0x90/0x90 [ 721.723328][ T1658] ? _raw_spin_lock_irq+0x41/0x50 [ 721.728392][ T1658] worker_thread+0x64c/0x1120 [ 721.734514][ T1658] ? process_one_work+0x15a0/0x15a0 [ 721.739740][ T1658] kthread+0x3b1/0x4a0 [ 721.745300][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.751228][ T1658] ret_from_fork+0x1f/0x30 [ 721.757206][ T1658] INFO: task kworker/1:2:3132 blocked for more than 143 seconds. [ 721.766062][ T1658] Not tainted 5.10.0-rc5-syzkaller #0 [ 721.772974][ T1658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.781677][ T1658] task:kworker/1:2 state:D stack:28864 pid: 3132 ppid: 2 flags:0x00004000 [ 721.793366][ T1658] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.799659][ T1658] Call Trace: [ 721.804495][ T1658] __schedule+0x893/0x2130 [ 721.808947][ T1658] ? io_schedule_timeout+0x140/0x140 [ 721.815794][ T1658] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.821045][ T1658] ? lockdep_hardirqs_on+0x79/0x100 [ 721.828943][ T1658] schedule+0xcf/0x270 [ 721.834154][ T1658] schedule_preempt_disabled+0xf/0x20 [ 721.839573][ T1658] __mutex_lock+0x3e2/0x10e0 [ 721.845821][ T1658] ? addrconf_verify_work+0xa/0x20 [ 721.850972][ T1658] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.857892][ T1658] ? lock_release+0x710/0x710 [ 721.864098][ T1658] ? lock_downgrade+0x6d0/0x6d0 [ 721.869037][ T1658] addrconf_verify_work+0xa/0x20 [ 721.875807][ T1658] process_one_work+0x933/0x15a0 [ 721.881006][ T1658] ? lock_release+0x710/0x710 [ 721.887492][ T1658] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.895141][ T1658] ? rwlock_bug.part.0+0x90/0x90 [ 721.900147][ T1658] ? _raw_spin_lock_irq+0x41/0x50 [ 721.906702][ T1658] worker_thread+0x64c/0x1120 [ 721.911428][ T1658] ? __kthread_parkme+0x13f/0x1e0 [ 721.918661][ T1658] ? process_one_work+0x15a0/0x15a0 [ 721.925186][ T1658] kthread+0x3b1/0x4a0 [ 721.929301][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 721.936633][ T1658] ret_from_fork+0x1f/0x30 [ 721.941204][ T1658] [ 721.941204][ T1658] Showing all locks held in the system: [ 721.950469][ T1658] 3 locks held by kworker/u4:3/131: [ 721.957974][ T1658] #0: ffff888141746138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 721.970655][ T1658] #1: ffffc9000109fda8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 721.983197][ T1658] #2: ffffffff8c927488 (rtnl_mutex){+.+.}-{3:3}, at: tcindex_partial_destroy_work+0x13/0x50 [ 721.994450][ T1658] 1 lock held by khungtaskd/1658: [ 721.999490][ T1658] #0: ffffffff8b3378e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.010863][ T1658] 3 locks held by kworker/1:2/3132: [ 722.017072][ T1658] #0: ffff88814725d138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 722.029165][ T1658] #1: ffffc9000211fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 722.040592][ T1658] #2: ffffffff8c927488 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 722.051178][ T1658] 1 lock held by in:imklog/8187: [ 722.057065][ T1658] #0: ffff88801bd799f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.067339][ T1658] 1 lock held by syz-executor448/8525: [ 722.073806][ T1658] [ 722.076165][ T1658] ============================================= [ 722.076165][ T1658] [ 722.087861][ T1658] NMI backtrace for cpu 1 [ 722.092434][ T1658] CPU: 1 PID: 1658 Comm: khungtaskd Not tainted 5.10.0-rc5-syzkaller #0 [ 722.100767][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.111448][ T1658] Call Trace: [ 722.114797][ T1658] dump_stack+0x107/0x163 [ 722.119158][ T1658] nmi_cpu_backtrace.cold+0x44/0xd7 [ 722.124751][ T1658] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.129976][ T1658] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 722.135983][ T1658] watchdog+0xd43/0xfa0 [ 722.140163][ T1658] ? reset_hung_task_detector+0x30/0x30 [ 722.145735][ T1658] kthread+0x3b1/0x4a0 [ 722.149816][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.155731][ T1658] ret_from_fork+0x1f/0x30 [ 722.160309][ T1658] Sending NMI from CPU 1 to CPUs 0: [ 722.167042][ C0] NMI backtrace for cpu 0 [ 722.167050][ C0] CPU: 0 PID: 8525 Comm: syz-executor448 Not tainted 5.10.0-rc5-syzkaller #0 [ 722.167057][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.167062][ C0] RIP: 0010:__radix_tree_lookup+0xc5/0x290 [ 722.167074][ C0] Code: 00 00 e8 2e 82 9f fd 48 8b 44 24 30 0f b6 00 84 c0 74 06 0f 8e a1 01 00 00 48 8b 44 24 28 41 bc 40 00 00 00 48 89 ef 0f b6 08 <49> d3 e4 49 83 ec 01 4c 89 e6 e8 ec 79 9f fd 4c 39 e5 0f 87 4e 01 [ 722.167079][ C0] RSP: 0018:ffffc9000156ecd0 EFLAGS: 00000246 [ 722.167090][ C0] RAX: ffff888016371e40 RBX: dffffc0000000000 RCX: 000000000000001e [ 722.167096][ C0] RDX: ffff888017809a40 RSI: ffffffff83d08262 RDI: 00000000fffffbff [ 722.167102][ C0] RBP: 00000000fffffbff R08: 0000000000000000 R09: ffff888013021607 [ 722.167108][ C0] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000040 [ 722.167114][ C0] R13: 0000000000000001 R14: ffff888013021600 R15: 0000000000000002 [ 722.167120][ C0] FS: 00000000024d5880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 722.167125][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.167131][ C0] CR2: 00007feb2576e000 CR3: 0000000011d41000 CR4: 00000000001506f0 [ 722.167137][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.167143][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.167147][ C0] Call Trace: [ 722.167151][ C0] tcf_idr_check_alloc+0xb0/0x3b0 [ 722.167156][ C0] tcf_police_init+0x347/0x13a0 [ 722.167160][ C0] ? tcf_police_cleanup+0x60/0x60 [ 722.167164][ C0] ? find_held_lock+0x2d/0x110 [ 722.167169][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 722.167173][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 722.167178][ C0] tcf_action_init_1+0x1a3/0x990 [ 722.167182][ C0] ? tcf_action_dump_old+0x80/0x80 [ 722.167186][ C0] ? ____sys_sendmsg+0x6e8/0x810 [ 722.167191][ C0] ? ___sys_sendmsg+0xf3/0x170 [ 722.167195][ C0] ? __sys_sendmsg+0xe5/0x1b0 [ 722.167199][ C0] ? do_syscall_64+0x2d/0x70 [ 722.167204][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.167208][ C0] ? find_held_lock+0x2d/0x110 [ 722.167213][ C0] tcf_exts_validate+0x138/0x420 [ 722.167217][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 722.167221][ C0] ? kasan_unpoison_shadow+0x33/0x40 [ 722.167226][ C0] tcindex_set_parms+0x189/0x20d0 [ 722.167231][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.167235][ C0] ? tcindex_alloc_perfect_hash+0x440/0x440 [ 722.167240][ C0] ? __nla_validate_parse+0x2d3/0x2ae0 [ 722.167244][ C0] ? nla_get_range_signed+0x520/0x520 [ 722.167248][ C0] ? find_held_lock+0x2d/0x110 [ 722.167253][ C0] tcindex_change+0x212/0x320 [ 722.167257][ C0] ? tcindex_set_parms+0x20d0/0x20d0 [ 722.167261][ C0] tc_new_tfilter+0x1398/0x2130 [ 722.167266][ C0] ? tcindex_set_parms+0x20d0/0x20d0 [ 722.167270][ C0] ? tc_del_tfilter+0x15c0/0x15c0 [ 722.167275][ C0] ? kernel_text_address+0xbd/0xf0 [ 722.167279][ C0] ? tc_del_tfilter+0x15c0/0x15c0 [ 722.167283][ C0] rtnetlink_rcv_msg+0x80e/0xad0 [ 722.167288][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 722.167292][ C0] netlink_rcv_skb+0x153/0x420 [ 722.167297][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 722.167301][ C0] ? netlink_ack+0xaa0/0xaa0 [ 722.167305][ C0] ? netlink_deliver_tap+0x227/0xb70 [ 722.167310][ C0] netlink_unicast+0x533/0x7d0 [ 722.167314][ C0] ? netlink_attachskb+0x810/0x810 [ 722.167318][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 722.167323][ C0] ? __check_object_size+0x171/0x3f0 [ 722.167327][ C0] netlink_sendmsg+0x856/0xd90 [ 722.167331][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 722.167336][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 722.167340][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 722.167344][ C0] sock_sendmsg+0xcf/0x120 [ 722.167348][ C0] ____sys_sendmsg+0x6e8/0x810 [ 722.167353][ C0] ? kernel_sendmsg+0x50/0x50 [ 722.167357][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 722.167361][ C0] ? rcu_read_lock_sched_held+0x3a/0x70 [ 722.167365][ C0] ? kfree+0x2d3/0x360 [ 722.167369][ C0] ___sys_sendmsg+0xf3/0x170 [ 722.167374][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.167378][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 722.167382][ C0] ? _copy_to_user+0xdc/0x150 [ 722.167386][ C0] ? move_addr_to_user+0xad/0x1e0 [ 722.167391][ C0] ? __fget_light+0x215/0x280 [ 722.167395][ C0] __sys_sendmsg+0xe5/0x1b0 [ 722.167399][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 722.167404][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 722.167408][ C0] do_syscall_64+0x2d/0x70 [ 722.167413][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.167416][ C0] RIP: 0033:0x441719 [ 722.167428][ C0] Code: e8 5c ad 02 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 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 722.167433][ C0] RSP: 002b:00007fff78cc2798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 722.167443][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441719 [ 722.167449][ C0] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 722.167455][ C0] RBP: 00007fff78cc27a0 R08: 0000000100000000 R09: 0000000100000000 [ 722.167461][ C0] R10: 0000000100000000 R11: 0000000000000246 R12: 000000000007680d [ 722.167467][ C0] R13: 00000000004025f0 R14: 0000000000000000 R15: 0000000000000000 [ 722.167473][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.370 msecs [ 722.168340][ T1658] Kernel panic - not syncing: hung_task: blocked tasks [ 722.704723][ T1658] CPU: 1 PID: 1658 Comm: khungtaskd Not tainted 5.10.0-rc5-syzkaller #0 [ 722.713073][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.723160][ T1658] Call Trace: [ 722.726491][ T1658] dump_stack+0x107/0x163 [ 722.730847][ T1658] panic+0x306/0x73d [ 722.734777][ T1658] ? __warn_printk+0xf3/0xf3 [ 722.739402][ T1658] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.744623][ T1658] ? preempt_schedule_thunk+0x16/0x18 [ 722.750114][ T1658] ? watchdog.cold+0x5/0x158 [ 722.754724][ T1658] ? watchdog+0xa80/0xfa0 [ 722.759084][ T1658] watchdog.cold+0x16/0x158 [ 722.763626][ T1658] ? reset_hung_task_detector+0x30/0x30 [ 722.769199][ T1658] kthread+0x3b1/0x4a0 [ 722.773288][ T1658] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.779206][ T1658] ret_from_fork+0x1f/0x30 [ 722.784273][ T1658] Kernel Offset: disabled [ 722.788623][ T1658] Rebooting in 86400 seconds..