Warning: Permanently added '10.128.0.141' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 486.845098][ T8488] IPVS: ftp: loaded support on port[0] = 21 [ 486.890375][ T8511] netlink: 20 bytes leftover after parsing attributes in process `syz-executor019'. [ 486.901400][ T8511] netlink: 24 bytes leftover after parsing attributes in process `syz-executor019'. [ 486.923952][ T8511] netlink: 24 bytes leftover after parsing attributes in process `syz-executor019'. [ 721.838534][ T1655] INFO: task kworker/0:2:3004 blocked for more than 143 seconds. [ 721.846740][ T1655] Not tainted 5.11.0-rc4-syzkaller #0 [ 721.856876][ T1655] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.867122][ T1655] task:kworker/0:2 state:D stack:28384 pid: 3004 ppid: 2 flags:0x00004000 [ 721.879180][ T1655] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.885756][ T1655] Call Trace: [ 721.892095][ T1655] __schedule+0x90c/0x21a0 [ 721.896816][ T1655] ? io_schedule_timeout+0x140/0x140 [ 721.905504][ T1655] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.912438][ T1655] ? lockdep_hardirqs_on+0x79/0x100 [ 721.917962][ T1655] schedule+0xcf/0x270 [ 721.925286][ T1655] schedule_preempt_disabled+0xf/0x20 [ 721.932403][ T1655] __mutex_lock+0x81a/0x1110 [ 721.937095][ T1655] ? addrconf_verify_work+0xa/0x20 [ 721.945390][ T1655] ? mutex_lock_io_nested+0xf60/0xf60 [ 721.953927][ T1655] ? lock_release+0x710/0x710 [ 721.961132][ T1655] ? lock_downgrade+0x6d0/0x6d0 [ 721.966385][ T1655] addrconf_verify_work+0xa/0x20 [ 721.975258][ T1655] process_one_work+0x98d/0x15f0 [ 721.983721][ T1655] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.992442][ T1655] ? rwlock_bug.part.0+0x90/0x90 [ 721.997595][ T1655] ? _raw_spin_lock_irq+0x41/0x50 [ 722.005719][ T1655] worker_thread+0x64c/0x1120 [ 722.013095][ T1655] ? process_one_work+0x15f0/0x15f0 [ 722.020942][ T1655] kthread+0x3b1/0x4a0 [ 722.025344][ T1655] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.034915][ T1655] ret_from_fork+0x1f/0x30 [ 722.042625][ T1655] INFO: task kworker/0:1:8516 blocked for more than 143 seconds. [ 722.054078][ T1655] Not tainted 5.11.0-rc4-syzkaller #0 [ 722.064279][ T1655] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 722.076751][ T1655] task:kworker/0:1 state:D stack:28824 pid: 8516 ppid: 2 flags:0x00004000 [ 722.089803][ T1655] Workqueue: events linkwatch_event [ 722.095509][ T1655] Call Trace: [ 722.109457][ T1655] __schedule+0x90c/0x21a0 [ 722.114960][ T1655] ? io_schedule_timeout+0x140/0x140 [ 722.123273][ T1655] ? _raw_spin_unlock_irq+0x1f/0x40 [ 722.131419][ T1655] ? lockdep_hardirqs_on+0x79/0x100 [ 722.137393][ T1655] schedule+0xcf/0x270 [ 722.144505][ T1655] schedule_preempt_disabled+0xf/0x20 [ 722.152194][ T1655] __mutex_lock+0x81a/0x1110 [ 722.157340][ T1655] ? linkwatch_event+0xb/0x60 [ 722.170240][ T1655] ? mutex_lock_io_nested+0xf60/0xf60 [ 722.176066][ T1655] ? lock_release+0x710/0x710 [ 722.185314][ T1655] linkwatch_event+0xb/0x60 [ 722.192152][ T1655] process_one_work+0x98d/0x15f0 [ 722.197836][ T1655] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.205468][ T1655] ? rwlock_bug.part.0+0x90/0x90 [ 722.211992][ T1655] ? _raw_spin_lock_irq+0x41/0x50 [ 722.217142][ T1655] worker_thread+0x64c/0x1120 [ 722.223925][ T1655] ? __kthread_parkme+0x13f/0x1e0 [ 722.230537][ T1655] ? process_one_work+0x15f0/0x15f0 [ 722.235856][ T1655] kthread+0x3b1/0x4a0 [ 722.242391][ T1655] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.250103][ T1655] ret_from_fork+0x1f/0x30 [ 722.254760][ T1655] [ 722.254760][ T1655] Showing all locks held in the system: [ 722.265296][ T1655] 1 lock held by khungtaskd/1655: [ 722.272021][ T1655] #0: ffffffff8b3738a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.285363][ T1655] 3 locks held by kworker/0:2/3004: [ 722.292223][ T1655] #0: ffff888020e2f138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 722.305030][ T1655] #1: ffffc90001d5fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 722.319762][ T1655] #2: ffffffff8ca5a248 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 722.332651][ T1655] 1 lock held by in:imklog/8273: [ 722.337671][ T1655] #0: ffff8880115899f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.348832][ T1655] 1 lock held by syz-executor019/8518: [ 722.354352][ T1655] 3 locks held by kworker/0:1/8516: [ 722.361295][ T1655] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 722.373600][ T1655] #1: ffffc9000179fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 722.386093][ T1655] #2: ffffffff8ca5a248 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 722.396619][ T1655] [ 722.400817][ T1655] ============================================= [ 722.400817][ T1655] [ 722.410890][ T1655] NMI backtrace for cpu 1 [ 722.415306][ T1655] CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 722.423695][ T1655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.433867][ T1655] Call Trace: [ 722.437241][ T1655] dump_stack+0x107/0x163 [ 722.441752][ T1655] nmi_cpu_backtrace.cold+0x44/0xd7 [ 722.447046][ T1655] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.452478][ T1655] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 722.458719][ T1655] watchdog+0xd43/0xfa0 [ 722.463563][ T1655] ? reset_hung_task_detector+0x30/0x30 [ 722.469341][ T1655] kthread+0x3b1/0x4a0 [ 722.473838][ T1655] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 722.479810][ T1655] ret_from_fork+0x1f/0x30 [ 722.484642][ T1655] Sending NMI from CPU 1 to CPUs 0: [ 722.491697][ C0] NMI backtrace for cpu 0 [ 722.491714][ C0] CPU: 0 PID: 8518 Comm: syz-executor019 Not tainted 5.11.0-rc4-syzkaller #0 [ 722.491725][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.491736][ C0] RIP: 0010:__lock_acquire+0xcb3/0x54f0 [ 722.491748][ C0] Code: 03 48 b8 00 00 00 00 00 fc ff df 0f b6 04 02 48 89 74 24 08 84 c0 74 08 3c 03 0f 8e a2 35 00 00 41 8b 44 24 20 25 00 80 04 00 <3d> 00 00 04 00 0f 84 dd 09 00 00 48 c7 c2 dc e6 03 8d 48 b8 00 00 [ 722.491766][ C0] RSP: 0018:ffffc9000166ea80 EFLAGS: 00000006 [ 722.491783][ C0] RAX: 0000000000040000 RBX: 0000000067d0f01c RCX: 000000004bd74921 [ 722.491793][ C0] RDX: 1ffff1100405913a RSI: f9cce5cdb33079a8 RDI: 000000003f6d2c8d [ 722.491803][ C0] RBP: ffff8880202c8000 R08: 0000000000000000 R09: ffffffff8ed37867 [ 722.491813][ C0] R10: fffffbfff1da6f0c R11: 0000000000000001 R12: ffff8880202c89b0 [ 722.491834][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 722.491844][ C0] FS: 00007f09e6999700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 722.491854][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.491863][ C0] CR2: 00007f09e6998e78 CR3: 000000001ad02000 CR4: 00000000001506f0 [ 722.491874][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.491884][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.491892][ C0] Call Trace: [ 722.491898][ C0] ? kvm_sched_clock_read+0x14/0x40 [ 722.491906][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.491914][ C0] ? mark_held_locks+0x9f/0xe0 [ 722.491920][ C0] lock_acquire+0x29d/0x740 [ 722.491927][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.491934][ C0] ? lock_release+0x710/0x710 [ 722.491941][ C0] __mutex_lock+0x134/0x1110 [ 722.491948][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.491955][ C0] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.491963][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 722.491970][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 722.491978][ C0] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.491986][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 722.491994][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 722.492001][ C0] ? wait_for_completion_io+0x260/0x260 [ 722.492008][ C0] ? __radix_tree_lookup+0x211/0x2a0 [ 722.492016][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 722.492023][ C0] tcf_police_init+0x34f/0x1460 [ 722.492031][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.492039][ C0] ? tcf_police_cleanup+0x60/0x60 [ 722.492047][ C0] ? find_held_lock+0x2d/0x110 [ 722.492054][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 722.492062][ C0] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 722.492070][ C0] ? pcpu_next_md_free_region+0xfe/0x370 [ 722.492078][ C0] tcf_action_init_1+0x103/0x640 [ 722.492085][ C0] ? tc_action_load_ops+0x440/0x440 [ 722.492092][ C0] ? tcf_action_dump_old+0x80/0x80 [ 722.492099][ C0] ? find_held_lock+0x2d/0x110 [ 722.492107][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 722.492115][ C0] tcf_exts_validate+0x1d7/0x540 [ 722.492122][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 722.492130][ C0] basic_change+0x47a/0x13d0 [ 722.492137][ C0] ? basic_bind_class+0x2c0/0x2c0 [ 722.492145][ C0] tc_new_tfilter+0x1394/0x2120 [ 722.492152][ C0] ? basic_bind_class+0x2c0/0x2c0 [ 722.492160][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 722.492167][ C0] ? lock_chain_count+0x20/0x20 [ 722.492175][ C0] ? kernel_text_address+0xbd/0xf0 [ 722.492183][ C0] ? tc_del_tfilter+0x15b0/0x15b0 [ 722.492190][ C0] rtnetlink_rcv_msg+0x80e/0xad0 [ 722.492198][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 722.492206][ C0] netlink_rcv_skb+0x153/0x420 [ 722.492213][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 722.492221][ C0] ? netlink_ack+0xaa0/0xaa0 [ 722.492229][ C0] ? netlink_deliver_tap+0x227/0xb70 [ 722.492236][ C0] netlink_unicast+0x533/0x7d0 [ 722.492244][ C0] ? netlink_attachskb+0x870/0x870 [ 722.492252][ C0] ? _copy_from_iter_full+0x275/0x850 [ 722.492260][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.492269][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 722.492276][ C0] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.492283][ C0] ? __check_object_size+0x171/0x3f0 [ 722.492289][ C0] netlink_sendmsg+0x856/0xd90 [ 722.492295][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 722.492300][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.492305][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 722.492308][ C0] sock_sendmsg+0xcf/0x120 [ 722.492312][ C0] ____sys_sendmsg+0x331/0x810 [ 722.492316][ C0] ? kernel_sendmsg+0x50/0x50 [ 722.492320][ C0] ? do_recvmmsg+0x6c0/0x6c0 [ 722.492323][ C0] ? __lock_acquire+0x16c2/0x54f0 [ 722.492327][ C0] ___sys_sendmsg+0xf3/0x170 [ 722.492331][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.492335][ C0] ? find_held_lock+0x2d/0x110 [ 722.492339][ C0] ? __might_fault+0xd3/0x180 [ 722.492343][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 722.492347][ C0] __sys_sendmmsg+0x195/0x470 [ 722.492351][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 722.492355][ C0] ? find_held_lock+0x2d/0x110 [ 722.492358][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 722.492363][ C0] ? syscall_enter_from_user_mode+0x1d/0x50 [ 722.492367][ C0] do_syscall_64+0x2d/0x70 [ 722.492371][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 722.492375][ C0] RIP: 0033:0x44ac99 [ 722.492381][ C0] Code: e8 bc b4 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 2b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 722.492392][ C0] RSP: 002b:00007f09e6998d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 722.492402][ C0] RAX: ffffffffffffffda RBX: 00000000006dfc88 RCX: 000000000044ac99 [ 722.492408][ C0] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000005 [ 722.492413][ C0] RBP: 00000000006dfc80 R08: 00007f09e6999700 R09: 0000000000000000 [ 722.492419][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc8c [ 722.492425][ C0] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 722.492431][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.627 msecs [ 722.513830][ T1655] Kernel panic - not syncing: hung_task: blocked tasks [ 723.116140][ T1655] CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.11.0-rc4-syzkaller #0 [ 723.125196][ T1655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.135712][ T1655] Call Trace: [ 723.139093][ T1655] dump_stack+0x107/0x163 [ 723.143632][ T1655] panic+0x306/0x73d [ 723.147940][ T1655] ? __warn_printk+0xf3/0xf3 [ 723.152616][ T1655] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.157887][ T1655] ? preempt_schedule_thunk+0x16/0x18 [ 723.163355][ T1655] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 723.169612][ T1655] ? watchdog.cold+0x5/0x158 [ 723.174415][ T1655] watchdog.cold+0x16/0x158 [ 723.179038][ T1655] ? reset_hung_task_detector+0x30/0x30 [ 723.184978][ T1655] kthread+0x3b1/0x4a0 [ 723.189186][ T1655] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 723.196505][ T1655] ret_from_fork+0x1f/0x30 [ 723.202500][ T1655] Kernel Offset: disabled [ 723.207121][ T1655] Rebooting in 86400 seconds..