Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 482.873781][ T8496] IPVS: ftp: loaded support on port[0] = 21 [ 715.698584][ T1657] INFO: task kworker/1:1:8488 blocked for more than 143 seconds. [ 715.706712][ T1657] Not tainted 5.11.0-rc4-syzkaller #0 [ 715.715476][ T1657] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 715.725084][ T1657] task:kworker/1:1 state:D stack:28944 pid: 8488 ppid: 2 flags:0x00004000 [ 715.735001][ T1657] Workqueue: ipv6_addrconf addrconf_verify_work [ 715.742136][ T1657] Call Trace: [ 715.745417][ T1657] __schedule+0x90c/0x21a0 [ 715.750813][ T1657] ? io_schedule_timeout+0x140/0x140 [ 715.756193][ T1657] ? _raw_spin_unlock_irq+0x1f/0x40 [ 715.762295][ T1657] ? lockdep_hardirqs_on+0x79/0x100 [ 715.767504][ T1657] schedule+0xcf/0x270 [ 715.772694][ T1657] schedule_preempt_disabled+0xf/0x20 [ 715.779349][ T1657] __mutex_lock+0x81a/0x1110 [ 715.784563][ T1657] ? addrconf_verify_work+0xa/0x20 [ 715.791046][ T1657] ? mutex_lock_io_nested+0xf60/0xf60 [ 715.796434][ T1657] ? lock_release+0x710/0x710 [ 715.802283][ T1657] ? lock_downgrade+0x6d0/0x6d0 [ 715.807631][ T1657] addrconf_verify_work+0xa/0x20 [ 715.813657][ T1657] process_one_work+0x98d/0x15f0 [ 715.819785][ T1657] ? pwq_dec_nr_in_flight+0x320/0x320 [ 715.825172][ T1657] ? rwlock_bug.part.0+0x90/0x90 [ 715.830914][ T1657] ? _raw_spin_lock_irq+0x41/0x50 [ 715.836149][ T1657] worker_thread+0x64c/0x1120 [ 715.842610][ T1657] ? __kthread_parkme+0x13f/0x1e0 [ 715.847653][ T1657] ? process_one_work+0x15f0/0x15f0 [ 715.854799][ T1657] kthread+0x3b1/0x4a0 [ 715.859682][ T1657] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 715.865833][ T1657] ret_from_fork+0x1f/0x30 [ 715.871170][ T1657] [ 715.871170][ T1657] Showing all locks held in the system: [ 715.879851][ T1657] 1 lock held by khungtaskd/1657: [ 715.884871][ T1657] #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 715.896343][ T1657] 1 lock held by in:imklog/8234: [ 715.902106][ T1657] #0: ffff88801be6c370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 715.912765][ T1657] 3 locks held by kworker/1:1/8488: [ 715.918046][ T1657] #0: ffff8880214dc138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 715.930283][ T1657] #1: ffffc9000184fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 715.941482][ T1657] #2: ffffffff8ca58e28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 715.951635][ T1657] 2 locks held by syz-executor376/8517: [ 715.957580][ T1657] [ 715.960745][ T1657] ============================================= [ 715.960745][ T1657] [ 715.970881][ T1657] NMI backtrace for cpu 1 [ 715.975210][ T1657] CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 715.984023][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 715.994073][ T1657] Call Trace: [ 715.997352][ T1657] dump_stack+0x107/0x163 [ 716.002279][ T1657] nmi_cpu_backtrace.cold+0x44/0xd7 [ 716.007478][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.012681][ T1657] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 716.018674][ T1657] watchdog+0xd43/0xfa0 [ 716.022857][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 716.029544][ T1657] kthread+0x3b1/0x4a0 [ 716.033909][ T1657] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 716.040906][ T1657] ret_from_fork+0x1f/0x30 [ 716.045835][ T1657] Sending NMI from CPU 1 to CPUs 0: [ 716.051823][ C0] NMI backtrace for cpu 0 [ 716.051830][ C0] CPU: 0 PID: 8517 Comm: syz-executor376 Not tainted 5.11.0-rc4-syzkaller #0 [ 716.051838][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.051845][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x24/0x80 [ 716.051853][ C0] Code: 66 0f 1f 44 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48 8b 0c 25 00 f0 01 00 48 89 ce 4c 8b 54 24 08 e8 3e f1 ff ff 84 c0 <74> 51 48 8b 81 b0 14 00 00 44 8b 81 ac 14 00 00 48 8b 10 49 c1 e0 [ 716.051865][ C0] RSP: 0018:ffffc900018becd0 EFLAGS: 00000246 [ 716.051875][ C0] RAX: 0000000000000000 RBX: ffff8880199a3600 RCX: ffff888017099bc0 [ 716.051881][ C0] RDX: 0000000000000000 RSI: ffff888017099bc0 RDI: 0000000000000003 [ 716.051887][ C0] RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000018 [ 716.051894][ C0] R10: ffffffff83d8f30b R11: 0000000000000000 R12: ffff888019987b82 [ 716.051900][ C0] R13: 0000000000000018 R14: 00000000f0000000 R15: ffff8880199a37a8 [ 716.051907][ C0] FS: 00000000015c4880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 716.051913][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.051919][ C0] CR2: 00007fb27ff1f6c0 CR3: 0000000012ece000 CR4: 0000000000350ef0 [ 716.051924][ C0] Call Trace: [ 716.051927][ C0] __radix_tree_lookup+0x19b/0x2a0 [ 716.051931][ C0] tcf_idr_check_alloc+0xb0/0x3b0 [ 716.051935][ C0] tcf_police_init+0x34f/0x1460 [ 716.051939][ C0] ? tcf_police_cleanup+0x60/0x60 [ 716.051944][ C0] ? find_held_lock+0x2d/0x110 [ 716.051948][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 716.051952][ C0] tcf_action_init_1+0x1a3/0x990 [ 716.051956][ C0] ? tcf_action_dump_old+0x80/0x80 [ 716.051960][ C0] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 716.051965][ C0] ? stack_depot_save+0x23c/0x4e0 [ 716.051969][ C0] ? kasan_save_stack+0x32/0x40 [ 716.051973][ C0] ? kasan_save_stack+0x32/0x40 [ 716.051977][ C0] ? kasan_save_stack+0x1b/0x40 [ 716.051981][ C0] ? ____kasan_kmalloc.constprop.0+0x82/0xa0 [ 716.051985][ C0] ? fw_change+0x4b5/0x13e0 [ 716.051989][ C0] ? rtnetlink_rcv_msg+0x80e/0xad0 [ 716.051994][ C0] ? netlink_rcv_skb+0x153/0x420 [ 716.051998][ C0] ? netlink_unicast+0x533/0x7d0 [ 716.052002][ C0] ? netlink_sendmsg+0x856/0xd90 [ 716.052006][ C0] ? sock_sendmsg+0xcf/0x120 [ 716.052010][ C0] ? ____sys_sendmsg+0x331/0x810 [ 716.052014][ C0] tcf_exts_validate+0x138/0x420 [ 716.052018][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 716.052022][ C0] fw_set_parms+0x13d/0xaa0 [ 716.052025][ C0] ? fw_delete+0x8c0/0x8c0 [ 716.052029][ C0] ? unpoison_range+0x3a/0x60 [ 716.052033][ C0] fw_change+0x57e/0x13e0 [ 716.052037][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 716.052041][ C0] ? fw_set_parms+0xaa0/0xaa0 [ 716.052044][ C0] ? tc_new_tfilter+0x132a/0x2120 [ 716.052049][ C0] tc_new_tfilter+0x1394/0x2120 [ 716.052053][ C0] ? fw_set_parms+0xaa0/0xaa0 [ 716.052057][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.052061][ C0] ? lock_chain_count+0x20/0x20 [ 716.052065][ C0] ? kernel_text_address+0xbd/0xf0 [ 716.052069][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 716.052073][ C0] rtnetlink_rcv_msg+0x80e/0xad0 [ 716.052077][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 716.052081][ C0] netlink_rcv_skb+0x153/0x420 [ 716.052085][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 716.052089][ C0] ? netlink_ack+0xaa0/0xaa0 [ 716.052093][ C0] ? netlink_deliver_tap+0x227/0xb70 [ 716.052097][ C0] netlink_unicast+0x533/0x7d0 [ 716.052101][ C0] ? netlink_attachskb+0x870/0x870 [ 716.052105][ C0] ? _copy_from_iter_full+0x275/0x850 [ 716.052109][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 716.052114][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 716.052118][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 716.052122][ C0] ? __check_object_size+0x171/0x3f0 [ 716.052126][ C0] netlink_sendmsg+0x856/0xd90 [ 716.052130][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 716.052134][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.052139][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 716.052143][ C0] sock_sendmsg+0xcf/0x120 [ 716.052146][ C0] ____sys_sendmsg+0x331/0x810 [ 716.052150][ C0] ? kernel_sendmsg+0x50/0x50 [ 716.052154][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 716.052157][ C0] ? __lock_acquire+0x16c2/0x54f0 [ 716.052166][ C0] ___sys_sendmsg+0xf3/0x170 [ 716.052170][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 716.052174][ C0] ? find_held_lock+0x2d/0x110 [ 716.052177][ C0] ? __might_fault+0xd3/0x180 [ 716.052181][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 716.052185][ C0] __sys_sendmmsg+0x195/0x470 [ 716.052189][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 716.052193][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 716.052198][ C0] ? sockfd_lookup_light+0xc5/0x180 [ 716.052202][ C0] ? __sys_sendmsg+0x10c/0x1b0 [ 716.052206][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 716.052210][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.052214][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 716.052219][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 716.052223][ C0] do_syscall_64+0x2d/0x70 [ 716.052227][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 716.052231][ C0] RIP: 0033:0x441579 [ 716.052238][ 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 [ 716.052249][ C0] RSP: 002b:00007ffcf18bd668 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 716.052258][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441579 [ 716.052264][ C0] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 716.052270][ C0] RBP: 00007ffcf18bd670 R08: 0000000120080522 R09: 0000000120080522 [ 716.052276][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2930 [ 716.052282][ C0] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 716.068422][ T1657] Kernel panic - not syncing: hung_task: blocked tasks [ 716.626838][ T1657] CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 716.635168][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.645224][ T1657] Call Trace: [ 716.648502][ T1657] dump_stack+0x107/0x163 [ 716.652841][ T1657] panic+0x306/0x73d [ 716.656738][ T1657] ? __warn_printk+0xf3/0xf3 [ 716.661338][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.666536][ T1657] ? preempt_schedule_thunk+0x16/0x18 [ 716.671910][ T1657] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 716.678158][ T1657] ? watchdog.cold+0x5/0x158 [ 716.682753][ T1657] watchdog.cold+0x16/0x158 [ 716.687354][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 716.692912][ T1657] kthread+0x3b1/0x4a0 [ 716.696984][ T1657] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 716.702881][ T1657] ret_from_fork+0x1f/0x30 [ 716.710992][ T1657] Kernel Offset: disabled [ 716.715649][ T1657] Rebooting in 86400 seconds..