Warning: Permanently added '10.128.1.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 487.550264][ T8471] IPVS: ftp: loaded support on port[0] = 21 [ 715.730163][ T1659] INFO: task kworker/1:0:19 blocked for more than 143 seconds. [ 715.738149][ T1659] Not tainted 5.11.0-rc5-syzkaller #0 [ 715.745686][ T1659] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 715.755433][ T1659] task:kworker/1:0 state:D stack:26984 pid: 19 ppid: 2 flags:0x00004000 [ 715.765470][ T1659] Workqueue: ipv6_addrconf addrconf_verify_work [ 715.772635][ T1659] Call Trace: [ 715.775931][ T1659] __schedule+0x90c/0x21a0 [ 715.781560][ T1659] ? io_schedule_timeout+0x140/0x140 [ 715.786869][ T1659] ? _raw_spin_unlock_irq+0x1f/0x40 [ 715.793279][ T1659] ? lockdep_hardirqs_on+0x79/0x100 [ 715.798525][ T1659] schedule+0xcf/0x270 [ 715.803592][ T1659] schedule_preempt_disabled+0xf/0x20 [ 715.808979][ T1659] __mutex_lock+0x81a/0x1110 [ 715.814955][ T1659] ? addrconf_verify_work+0xa/0x20 [ 715.820967][ T1659] ? mutex_lock_io_nested+0xf60/0xf60 [ 715.826364][ T1659] ? lock_release+0x710/0x710 [ 715.832076][ T1659] ? lock_downgrade+0x6d0/0x6d0 [ 715.836957][ T1659] addrconf_verify_work+0xa/0x20 [ 715.843672][ T1659] process_one_work+0x98d/0x15f0 [ 715.848746][ T1659] ? pwq_dec_nr_in_flight+0x320/0x320 [ 715.855216][ T1659] ? rwlock_bug.part.0+0x90/0x90 [ 715.860812][ T1659] ? _raw_spin_lock_irq+0x41/0x50 [ 715.865866][ T1659] worker_thread+0x64c/0x1120 [ 715.871665][ T1659] ? process_one_work+0x15f0/0x15f0 [ 715.876897][ T1659] kthread+0x3b1/0x4a0 [ 715.881948][ T1659] ? __kthread_bind_mask+0xc0/0xc0 [ 715.887072][ T1659] ret_from_fork+0x1f/0x30 [ 715.892831][ T1659] [ 715.892831][ T1659] Showing all locks held in the system: [ 715.901396][ T1659] 3 locks held by kworker/1:0/19: [ 715.906421][ T1659] #0: ffff8880214d2538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 715.919167][ T1659] #1: ffffc90000d97da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 715.930229][ T1659] #2: ffffffff8ca58b28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 715.939844][ T1659] 1 lock held by khungtaskd/1659: [ 715.945906][ T1659] #0: ffffffff8b373ce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 715.956733][ T1659] 1 lock held by in:imklog/8166: [ 715.962243][ T1659] #0: ffff88801c4879f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 715.973478][ T1659] 1 lock held by syz-executor973/8492: [ 715.978963][ T1659] [ 715.982136][ T1659] ============================================= [ 715.982136][ T1659] [ 715.991278][ T1659] NMI backtrace for cpu 0 [ 715.995625][ T1659] CPU: 0 PID: 1659 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 716.004030][ T1659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.014166][ T1659] Call Trace: [ 716.017437][ T1659] dump_stack+0x107/0x163 [ 716.021768][ T1659] nmi_cpu_backtrace.cold+0x44/0xd7 [ 716.026964][ T1659] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.032162][ T1659] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 716.038145][ T1659] watchdog+0xd43/0xfa0 [ 716.042331][ T1659] ? reset_hung_task_detector+0x30/0x30 [ 716.047878][ T1659] kthread+0x3b1/0x4a0 [ 716.051949][ T1659] ? __kthread_bind_mask+0xc0/0xc0 [ 716.057066][ T1659] ret_from_fork+0x1f/0x30 [ 716.061639][ T1659] Sending NMI from CPU 0 to CPUs 1: [ 716.067569][ C1] NMI backtrace for cpu 1 [ 716.067576][ C1] CPU: 1 PID: 8492 Comm: syz-executor973 Not tainted 5.11.0-rc5-syzkaller #0 [ 716.067583][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.067590][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 [ 716.067599][ C1] 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 [ 716.067610][ C1] RSP: 0018:ffffc9000c666ce0 EFLAGS: 00000286 [ 716.067620][ C1] RAX: 0000000080000000 RBX: ffff8880163e78c0 RCX: 0000000080000000 [ 716.067626][ C1] RDX: ffff88801fe89bc0 RSI: ffffffff83d8f2a1 RDI: ffff8880163e7ae0 [ 716.067633][ C1] RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000012 [ 716.067639][ C1] R10: ffffffff83d8f24f R11: 000000000000003f R12: ffff8880163e7602 [ 716.067645][ C1] R13: 0000000000000012 R14: 00000000ffffff55 R15: ffff8880163e7ae0 [ 716.067652][ C1] FS: 0000000001ec4880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 716.067658][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.067664][ C1] CR2: 00007fba7ecfe6c0 CR3: 00000000167f4000 CR4: 0000000000350ee0 [ 716.067669][ C1] Call Trace: [ 716.067672][ C1] __radix_tree_lookup+0x191/0x2a0 [ 716.067676][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 716.067680][ C1] tcf_police_init+0x34f/0x1460 [ 716.067684][ C1] ? tcf_police_cleanup+0x60/0x60 [ 716.067688][ C1] ? find_held_lock+0x2d/0x110 [ 716.067693][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 716.067697][ C1] ? stack_trace_save+0x8c/0xc0 [ 716.067701][ C1] tcf_action_init_1+0x1a3/0x990 [ 716.067705][ C1] ? tcf_action_dump_old+0x80/0x80 [ 716.067709][ C1] ? ____sys_sendmsg+0x331/0x810 [ 716.067713][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 716.067717][ C1] ? __sys_sendmmsg+0x195/0x470 [ 716.067721][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 716.067725][ C1] ? do_syscall_64+0x2d/0x70 [ 716.067729][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 716.067734][ C1] ? find_held_lock+0x2d/0x110 [ 716.067738][ C1] tcf_exts_validate+0x138/0x420 [ 716.067742][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 716.067746][ C1] ? unpoison_range+0x3a/0x60 [ 716.067750][ C1] rsvp_change+0x291/0x27a0 [ 716.067754][ C1] ? find_held_lock+0x2d/0x110 [ 716.067758][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 716.067762][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 716.067766][ C1] ? blackhole_dequeue+0x10/0x10 [ 716.067770][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.067775][ C1] tc_new_tfilter+0x1394/0x2120 [ 716.067779][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 716.067784][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.067788][ C1] ? lock_chain_count+0x20/0x20 [ 716.067792][ C1] ? kernel_text_address+0xbd/0xf0 [ 716.067796][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.067800][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 716.067804][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 716.067809][ C1] netlink_rcv_skb+0x153/0x420 [ 716.067813][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 716.067817][ C1] ? netlink_ack+0xaa0/0xaa0 [ 716.067821][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 716.067825][ C1] netlink_unicast+0x533/0x7d0 [ 716.067829][ C1] ? netlink_attachskb+0x870/0x870 [ 716.067833][ C1] ? _copy_from_iter_full+0x275/0x850 [ 716.067838][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 716.067843][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 716.067847][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 716.067851][ C1] ? __check_object_size+0x171/0x3f0 [ 716.067855][ C1] netlink_sendmsg+0x856/0xd90 [ 716.067859][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 716.067864][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.067868][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 716.067872][ C1] sock_sendmsg+0xcf/0x120 [ 716.067876][ C1] ____sys_sendmsg+0x331/0x810 [ 716.067885][ C1] ? kernel_sendmsg+0x50/0x50 [ 716.067889][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 716.067893][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 716.067897][ C1] ___sys_sendmsg+0xf3/0x170 [ 716.067900][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 716.067905][ C1] ? find_held_lock+0x2d/0x110 [ 716.067908][ C1] ? __might_fault+0xd3/0x180 [ 716.067912][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 716.067916][ C1] __sys_sendmmsg+0x195/0x470 [ 716.067920][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 716.067924][ C1] ? find_held_lock+0x2d/0x110 [ 716.067928][ C1] ? alloc_file_pseudo+0x1/0x250 [ 716.067932][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.067936][ C1] ? fd_install+0x215/0x640 [ 716.067940][ C1] ? __sys_socket+0x16d/0x200 [ 716.067944][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 716.067948][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 716.067953][ C1] do_syscall_64+0x2d/0x70 [ 716.067957][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 716.067961][ C1] RIP: 0033:0x441729 [ 716.067968][ C1] 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 [ 716.067979][ C1] RSP: 002b:00007ffcf8a32988 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 716.067988][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441729 [ 716.067995][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 716.068001][ C1] RBP: 00007ffcf8a32990 R08: 0000000120080522 R09: 0000000120080522 [ 716.068007][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2a70 [ 716.068013][ C1] R13: 0000000000402600 R14: 0000000000000000 R15: 0000000000000000 [ 716.080083][ T1659] Kernel panic - not syncing: hung_task: blocked tasks [ 716.616919][ T1659] CPU: 0 PID: 1659 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 716.625251][ T1659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.635308][ T1659] Call Trace: [ 716.638583][ T1659] dump_stack+0x107/0x163 [ 716.642918][ T1659] panic+0x306/0x73d [ 716.646841][ T1659] ? __warn_printk+0xf3/0xf3 [ 716.651433][ T1659] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.656628][ T1659] ? preempt_schedule_thunk+0x16/0x18 [ 716.662000][ T1659] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 716.668158][ T1659] ? watchdog.cold+0x5/0x158 [ 716.672747][ T1659] watchdog.cold+0x16/0x158 [ 716.677617][ T1659] ? reset_hung_task_detector+0x30/0x30 [ 716.683166][ T1659] kthread+0x3b1/0x4a0 [ 716.687232][ T1659] ? __kthread_bind_mask+0xc0/0xc0 [ 716.692360][ T1659] ret_from_fork+0x1f/0x30 [ 716.700689][ T1659] Kernel Offset: disabled [ 716.705648][ T1659] Rebooting in 86400 seconds..