Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 610.063706][ T8457] IPVS: ftp: loaded support on port[0] = 21 [ 864.712057][ T1657] INFO: task kworker/0:0:8449 blocked for more than 143 seconds. [ 864.720033][ T1657] Not tainted 5.11.0-rc5-syzkaller #0 [ 864.727736][ T1657] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 864.737159][ T1657] task:kworker/0:0 state:D stack:28944 pid: 8449 ppid: 2 flags:0x00004000 [ 864.747030][ T1657] Workqueue: ipv6_addrconf addrconf_verify_work [ 864.754076][ T1657] Call Trace: [ 864.757419][ T1657] __schedule+0x90c/0x21a0 [ 864.762989][ T1657] ? io_schedule_timeout+0x140/0x140 [ 864.768300][ T1657] ? _raw_spin_unlock_irq+0x1f/0x40 [ 864.774626][ T1657] ? lockdep_hardirqs_on+0x79/0x100 [ 864.779877][ T1657] schedule+0xcf/0x270 [ 864.785020][ T1657] schedule_preempt_disabled+0xf/0x20 [ 864.790416][ T1657] __mutex_lock+0x81a/0x1110 [ 864.796160][ T1657] ? addrconf_verify_work+0xa/0x20 [ 864.801306][ T1657] ? mutex_lock_io_nested+0xf60/0xf60 [ 864.808962][ T1657] ? lock_release+0x710/0x710 [ 864.814476][ T1657] ? lock_downgrade+0x6d0/0x6d0 [ 864.819383][ T1657] addrconf_verify_work+0xa/0x20 [ 864.825449][ T1657] process_one_work+0x98d/0x15f0 [ 864.830503][ T1657] ? pwq_dec_nr_in_flight+0x320/0x320 [ 864.837052][ T1657] ? rwlock_bug.part.0+0x90/0x90 [ 864.842655][ T1657] ? _raw_spin_lock_irq+0x41/0x50 [ 864.847725][ T1657] worker_thread+0x64c/0x1120 [ 864.853567][ T1657] ? __kthread_parkme+0x13f/0x1e0 [ 864.858620][ T1657] ? process_one_work+0x15f0/0x15f0 [ 864.865321][ T1657] kthread+0x3b1/0x4a0 [ 864.869779][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 864.876235][ T1657] ret_from_fork+0x1f/0x30 [ 864.880813][ T1657] [ 864.880813][ T1657] Showing all locks held in the system: [ 864.890196][ T1657] 1 lock held by khungtaskd/1657: [ 864.896849][ T1657] #0: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 864.907445][ T1657] 1 lock held by in:imklog/8164: [ 864.913056][ T1657] #0: ffff88801fc374f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 864.922943][ T1657] 3 locks held by kworker/0:0/8449: [ 864.928154][ T1657] #0: ffff888147e54538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 864.941447][ T1657] #1: ffffc90002b47da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 864.952534][ T1657] #2: ffffffff8ca58a68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 864.962733][ T1657] 1 lock held by syz-executor471/8479: [ 864.969206][ T1657] [ 864.971542][ T1657] ============================================= [ 864.971542][ T1657] [ 864.981834][ T1657] NMI backtrace for cpu 0 [ 864.986290][ T1657] CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 864.994627][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.004691][ T1657] Call Trace: [ 865.007980][ T1657] dump_stack+0x107/0x163 [ 865.012397][ T1657] nmi_cpu_backtrace.cold+0x44/0xd7 [ 865.017632][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.022889][ T1657] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 865.028939][ T1657] watchdog+0xd43/0xfa0 [ 865.033175][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 865.038745][ T1657] kthread+0x3b1/0x4a0 [ 865.042829][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 865.047973][ T1657] ret_from_fork+0x1f/0x30 [ 865.052602][ T1657] Sending NMI from CPU 0 to CPUs 1: [ 865.059432][ C1] NMI backtrace for cpu 1 [ 865.059443][ C1] CPU: 1 PID: 8479 Comm: syz-executor471 Not tainted 5.11.0-rc5-syzkaller #0 [ 865.059454][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.059464][ C1] RIP: 0010:lock_release+0x302/0x710 [ 865.059476][ C1] Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 aa 03 00 00 49 8d bf 78 09 00 00 48 8b 1b 48 b8 00 00 00 00 00 fc ff df 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 9c 03 00 00 41 8d 45 ff 49 89 9f 78 [ 865.059492][ C1] RSP: 0018:ffffc900014febc8 EFLAGS: 00000046 [ 865.059507][ C1] RAX: dffffc0000000000 RBX: 03607339c2aba47c RCX: ffffc900014fec18 [ 865.059516][ C1] RDX: ffff888020ed0978 RSI: 0000000000000000 RDI: ffff888020ed0978 [ 865.059526][ C1] RBP: 1ffff9200029fd7b R08: 0000000000000000 R09: 0000000000000000 [ 865.059535][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 [ 865.059545][ C1] R13: 0000000000000002 R14: ffff888020ed0980 R15: ffff888020ed0000 [ 865.059555][ C1] FS: 0000000001b9d880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 865.059564][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 865.059573][ C1] CR2: 00007f008ca75000 CR3: 0000000011413000 CR4: 00000000001506e0 [ 865.059583][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 865.059592][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 865.059600][ C1] Call Trace: [ 865.059606][ C1] ? tcf_idr_check_alloc+0x29e/0x3b0 [ 865.059613][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.059620][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 865.059627][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 865.059634][ C1] __mutex_unlock_slowpath+0x81/0x610 [ 865.059641][ C1] ? wait_for_completion_io+0x260/0x260 [ 865.059649][ C1] ? __radix_tree_lookup+0x211/0x2a0 [ 865.059656][ C1] tcf_idr_check_alloc+0x29e/0x3b0 [ 865.059662][ C1] tcf_police_init+0x34f/0x1460 [ 865.059669][ C1] ? tcf_police_cleanup+0x60/0x60 [ 865.059676][ C1] ? find_held_lock+0x2d/0x110 [ 865.059682][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 865.059689][ C1] ? stack_trace_save+0x8c/0xc0 [ 865.059696][ C1] tcf_action_init_1+0x1a3/0x990 [ 865.059703][ C1] ? tcf_action_dump_old+0x80/0x80 [ 865.059710][ C1] ? ____sys_sendmsg+0x331/0x810 [ 865.059716][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 865.059723][ C1] ? __sys_sendmmsg+0x195/0x470 [ 865.059737][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 865.059744][ C1] ? do_syscall_64+0x2d/0x70 [ 865.059750][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.059758][ C1] ? find_held_lock+0x2d/0x110 [ 865.059765][ C1] tcf_exts_validate+0x138/0x420 [ 865.059771][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 865.059778][ C1] ? unpoison_range+0x3a/0x60 [ 865.059784][ C1] rsvp_change+0x291/0x27a0 [ 865.059791][ C1] ? find_held_lock+0x2d/0x110 [ 865.059798][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 865.059805][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.059811][ C1] ? blackhole_dequeue+0x10/0x10 [ 865.059819][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.059826][ C1] tc_new_tfilter+0x1394/0x2120 [ 865.059833][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 865.059841][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.059848][ C1] ? lock_chain_count+0x20/0x20 [ 865.059856][ C1] ? kernel_text_address+0xbd/0xf0 [ 865.059863][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 865.059870][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 865.059878][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 865.059885][ C1] netlink_rcv_skb+0x153/0x420 [ 865.059892][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 865.059900][ C1] ? netlink_ack+0xaa0/0xaa0 [ 865.059907][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 865.059914][ C1] netlink_unicast+0x533/0x7d0 [ 865.059921][ C1] ? netlink_attachskb+0x870/0x870 [ 865.059929][ C1] ? _copy_from_iter_full+0x275/0x850 [ 865.059937][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 865.059945][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 865.059952][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 865.059960][ C1] ? __check_object_size+0x171/0x3f0 [ 865.059968][ C1] netlink_sendmsg+0x856/0xd90 [ 865.059975][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 865.059982][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.059990][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 865.059997][ C1] sock_sendmsg+0xcf/0x120 [ 865.060004][ C1] ____sys_sendmsg+0x331/0x810 [ 865.060011][ C1] ? kernel_sendmsg+0x50/0x50 [ 865.060018][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 865.060025][ C1] ? __lock_acquire+0x16c2/0x54f0 [ 865.060032][ C1] ___sys_sendmsg+0xf3/0x170 [ 865.060039][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 865.060047][ C1] ? find_held_lock+0x2d/0x110 [ 865.060054][ C1] ? __might_fault+0xd3/0x180 [ 865.060061][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 865.060067][ C1] __sys_sendmmsg+0x195/0x470 [ 865.060073][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 865.060078][ C1] ? find_held_lock+0x2d/0x110 [ 865.060083][ C1] ? alloc_file_pseudo+0x1/0x250 [ 865.060087][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 865.060091][ C1] ? fd_install+0x215/0x640 [ 865.060095][ C1] ? __sys_socket+0x16d/0x200 [ 865.060099][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 865.060104][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 865.060108][ C1] do_syscall_64+0x2d/0x70 [ 865.060112][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 865.060117][ C1] RIP: 0033:0x4422a9 [ 865.060123][ 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 [ 865.060133][ C1] RSP: 002b:00007fff86330138 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 865.060143][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004422a9 [ 865.060149][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000004 [ 865.060154][ C1] RBP: 00007fff86330140 R08: 0000000120080522 R09: 0000000120080522 [ 865.060160][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a35f0 [ 865.060166][ C1] R13: 0000000000403180 R14: 0000000000000000 R15: 0000000000000000 [ 865.060172][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.565 msecs [ 865.060212][ T1657] Kernel panic - not syncing: hung_task: blocked tasks [ 865.060234][ T1657] CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 [ 865.671224][ T1657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 865.681285][ T1657] Call Trace: [ 865.684575][ T1657] dump_stack+0x107/0x163 [ 865.688926][ T1657] panic+0x306/0x73d [ 865.692886][ T1657] ? __warn_printk+0xf3/0xf3 [ 865.697497][ T1657] ? lapic_can_unplug_cpu+0x80/0x80 [ 865.702708][ T1657] ? preempt_schedule_thunk+0x16/0x18 [ 865.708097][ T1657] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 865.714266][ T1657] ? watchdog.cold+0x5/0x158 [ 865.718910][ T1657] watchdog.cold+0x16/0x158 [ 865.723433][ T1657] ? reset_hung_task_detector+0x30/0x30 [ 865.729000][ T1657] kthread+0x3b1/0x4a0 [ 865.733078][ T1657] ? __kthread_bind_mask+0xc0/0xc0 [ 865.738203][ T1657] ret_from_fork+0x1f/0x30 [ 865.743151][ T1657] Kernel Offset: disabled [ 865.747482][ T1657] Rebooting in 86400 seconds..