Warning: Permanently added '10.128.0.124' (ECDSA) to the list of known hosts. executing program [ 507.668297][ T6888] IPVS: ftp: loaded support on port[0] = 21 [ 780.122629][ T1171] INFO: task kworker/0:1:6880 blocked for more than 143 seconds. [ 780.130547][ T1171] Not tainted 5.9.0-rc8-syzkaller #0 [ 780.138002][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 780.147244][ T1171] task:kworker/0:1 state:D stack:29856 pid: 6880 ppid: 2 flags:0x00004000 [ 780.157037][ T1171] Workqueue: ipv6_addrconf addrconf_verify_work [ 780.163795][ T1171] Call Trace: [ 780.167126][ T1171] __schedule+0xec9/0x2280 [ 780.171626][ T1171] ? io_schedule_timeout+0x140/0x140 [ 780.178957][ T1171] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 780.185492][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.190688][ T1171] ? lockdep_hardirqs_on+0x53/0x100 [ 780.196827][ T1171] schedule+0xd0/0x2a0 [ 780.200893][ T1171] schedule_preempt_disabled+0xf/0x20 [ 780.207128][ T1171] __mutex_lock+0x3e2/0x10e0 [ 780.211715][ T1171] ? addrconf_verify_work+0xa/0x20 [ 780.217738][ T1171] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.223885][ T1171] ? lock_release+0x8f0/0x8f0 [ 780.228564][ T1171] ? lock_downgrade+0x830/0x830 [ 780.234243][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.239441][ T1171] ? lock_is_held_type+0xbb/0xf0 [ 780.246161][ T1171] addrconf_verify_work+0xa/0x20 [ 780.251097][ T1171] process_one_work+0x94c/0x1670 [ 780.256877][ T1171] ? lock_release+0x8f0/0x8f0 [ 780.261571][ T1171] ? pwq_dec_nr_in_flight+0x320/0x320 [ 780.267807][ T1171] ? rwlock_bug.part.0+0x90/0x90 [ 780.273210][ T1171] ? lockdep_hardirqs_off+0x96/0xd0 [ 780.278413][ T1171] worker_thread+0x64c/0x1120 [ 780.283925][ T1171] ? __kthread_parkme+0x13f/0x1e0 [ 780.288949][ T1171] ? process_one_work+0x1670/0x1670 [ 780.294996][ T1171] kthread+0x3b5/0x4a0 [ 780.299063][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 780.306261][ T1171] ret_from_fork+0x1f/0x30 [ 780.310818][ T1171] [ 780.310818][ T1171] Showing all locks held in the system: [ 780.319432][ T1171] 1 lock held by khungtaskd/1171: [ 780.325730][ T1171] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 780.336315][ T1171] 1 lock held by in:imklog/6568: [ 780.341245][ T1171] #0: ffff8880a6739b70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 780.351272][ T1171] 3 locks held by kworker/0:1/6880: [ 780.356970][ T1171] #0: ffff888099ecd938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 780.368535][ T1171] #1: ffffc900056d7da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 780.379343][ T1171] #2: ffffffff8b150988 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 780.389348][ T1171] 2 locks held by syz-executor924/6909: [ 780.395425][ T1171] [ 780.397869][ T1171] ============================================= [ 780.397869][ T1171] [ 780.407089][ T1171] NMI backtrace for cpu 0 [ 780.411415][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 780.419628][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.429692][ T1171] Call Trace: [ 780.433023][ T1171] dump_stack+0x198/0x1fd [ 780.437345][ T1171] nmi_cpu_backtrace.cold+0x70/0xb1 [ 780.442533][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 780.448172][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 780.454146][ T1171] watchdog+0xd7d/0x1000 [ 780.458382][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 780.463914][ T1171] kthread+0x3b5/0x4a0 [ 780.467980][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 780.473084][ T1171] ret_from_fork+0x1f/0x30 [ 780.477597][ T1171] Sending NMI from CPU 0 to CPUs 1: [ 780.483866][ C1] NMI backtrace for cpu 1 [ 780.483871][ C1] CPU: 1 PID: 6909 Comm: syz-executor924 Not tainted 5.9.0-rc8-syzkaller #0 [ 780.483876][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.483879][ C1] RIP: 0010:lock_acquire+0x106/0xaf0 [ 780.483888][ C1] Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 68 07 00 00 <41> 8b bf e4 08 00 00 85 ff 0f 85 e0 02 00 00 48 c7 c0 e0 6b fc 89 [ 780.483891][ C1] RSP: 0018:ffffc900056a6ae0 EFLAGS: 00000246 [ 780.483897][ C1] RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff815c09ee [ 780.483901][ C1] RDX: 0000000000000000 RSI: ffffffff8a067e80 RDI: ffff888092eece24 [ 780.483905][ C1] RBP: ffff88809ef9d868 R08: 0000000000000000 R09: ffffffff8b59974f [ 780.483909][ C1] R10: fffffbfff16b32e9 R11: 0000000000000000 R12: 0000000000000000 [ 780.483913][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888092eec540 [ 780.483917][ C1] FS: 00000000015d9880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 780.483921][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 780.483924][ C1] CR2: 0000000020000280 CR3: 00000000a216b000 CR4: 00000000001506e0 [ 780.483928][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 780.483932][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 780.483934][ C1] Call Trace: [ 780.483937][ C1] ? lock_release+0x8f0/0x8f0 [ 780.483940][ C1] ? mark_lock+0x82/0x1660 [ 780.483942][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.483945][ C1] __mutex_lock+0x134/0x10e0 [ 780.483948][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 780.483951][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 780.483954][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 780.483957][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.483960][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 780.483962][ C1] ? kcov_close+0x10/0x10 [ 780.483965][ C1] ? wait_for_completion+0x260/0x260 [ 780.483968][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 780.483970][ C1] tcf_police_init+0x347/0x13a0 [ 780.483973][ C1] ? tcf_police_cleanup+0x60/0x60 [ 780.483976][ C1] ? find_held_lock+0x2d/0x110 [ 780.483979][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 780.483981][ C1] ? mark_held_locks+0x9f/0xe0 [ 780.483984][ C1] ? check_preemption_disabled+0x50/0x130 [ 780.483987][ C1] tcf_action_init_1+0x1a3/0x990 [ 780.483990][ C1] ? tcf_action_dump_old+0x80/0x80 [ 780.483992][ C1] ? kasan_save_stack+0x32/0x40 [ 780.483995][ C1] ? kasan_save_stack+0x1b/0x40 [ 780.483998][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 780.484001][ C1] ? kmem_cache_alloc_trace+0x174/0x300 [ 780.484004][ C1] ? fw_change+0x4b5/0x13e0 [ 780.484006][ C1] ? tc_new_tfilter+0x1398/0x2130 [ 780.484009][ C1] ? rtnetlink_rcv_msg+0x80f/0xad0 [ 780.484012][ C1] ? netlink_rcv_skb+0x15a/0x430 [ 780.484015][ C1] ? netlink_unicast+0x533/0x7d0 [ 780.484017][ C1] ? netlink_sendmsg+0x856/0xd90 [ 780.484020][ C1] ? sock_sendmsg+0xcf/0x120 [ 780.484023][ C1] ? ____sys_sendmsg+0x331/0x810 [ 780.484025][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 780.484028][ C1] ? __sys_sendmmsg+0x195/0x480 [ 780.484030][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 780.484033][ C1] ? do_syscall_64+0x2d/0x70 [ 780.484040][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.484043][ C1] tcf_exts_validate+0x138/0x420 [ 780.484046][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 780.484053][ C1] ? mark_lock+0x82/0x1660 [ 780.484056][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484058][ C1] fw_set_parms+0x13d/0xa30 [ 780.484061][ C1] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 780.484064][ C1] ? fw_delete+0x8c0/0x8c0 [ 780.484067][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 780.484069][ C1] ? __nla_parse+0x3d/0x4a [ 780.484072][ C1] fw_change+0x57e/0x13e0 [ 780.484074][ C1] ? lock_downgrade+0x830/0x830 [ 780.484093][ C1] ? fw_set_parms+0xa30/0xa30 [ 780.484096][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484099][ C1] tc_new_tfilter+0x1398/0x2130 [ 780.484102][ C1] ? fw_set_parms+0xa30/0xa30 [ 780.484105][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 780.484108][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.484111][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.484114][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484117][ C1] ? security_capable+0x8f/0xc0 [ 780.484120][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484123][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 780.484126][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 780.484129][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 780.484132][ C1] ? lock_acquire+0x1f3/0xaf0 [ 780.484135][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 780.484138][ C1] netlink_rcv_skb+0x15a/0x430 [ 780.484141][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 780.484144][ C1] ? netlink_ack+0xa10/0xa10 [ 780.484147][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 780.484150][ C1] netlink_unicast+0x533/0x7d0 [ 780.484153][ C1] ? netlink_attachskb+0x810/0x810 [ 780.484156][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 780.484159][ C1] ? __check_object_size+0x171/0x3e4 [ 780.484162][ C1] netlink_sendmsg+0x856/0xd90 [ 780.484165][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 780.484168][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 780.484171][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 780.484173][ C1] sock_sendmsg+0xcf/0x120 [ 780.484176][ C1] ____sys_sendmsg+0x331/0x810 [ 780.484179][ C1] ? kernel_sendmsg+0x50/0x50 [ 780.484182][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 780.484184][ C1] ? __lock_acquire+0x164a/0x5780 [ 780.484187][ C1] ___sys_sendmsg+0xf3/0x170 [ 780.484190][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 780.484193][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.484196][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484199][ C1] ? find_held_lock+0x2d/0x110 [ 780.484202][ C1] ? __might_fault+0x11f/0x1d0 [ 780.484205][ C1] ? lock_downgrade+0x830/0x830 [ 780.484208][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484211][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484213][ C1] __sys_sendmmsg+0x195/0x480 [ 780.484216][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 780.484219][ C1] ? __might_fault+0x190/0x1d0 [ 780.484222][ C1] ? _copy_to_user+0x126/0x160 [ 780.484225][ C1] ? sockfd_lookup_light+0xc6/0x180 [ 780.484228][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 780.484231][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 780.484233][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.484237][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 780.484240][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 780.484243][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 780.484245][ C1] do_syscall_64+0x2d/0x70 [ 780.484249][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.484251][ C1] RIP: 0033:0x441579 [ 780.484260][ 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 [ 780.484264][ C1] RSP: 002b:00007fffe33b6518 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 780.484271][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441579 [ 780.484275][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 780.484279][ C1] RBP: 00007fffe33b6520 R08: 0000000120080522 R09: 0000000120080522 [ 780.484283][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2930 [ 780.484288][ C1] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 780.484293][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 780.502474][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 781.217221][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 781.225444][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.235668][ T1171] Call Trace: [ 781.238953][ T1171] dump_stack+0x198/0x1fd [ 781.243286][ T1171] panic+0x382/0x7fb [ 781.247171][ T1171] ? __warn_printk+0xf3/0xf3 [ 781.251751][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 781.257370][ T1171] ? preempt_schedule_thunk+0x16/0x18 [ 781.262728][ T1171] ? watchdog.cold+0x5/0x16b [ 781.267304][ T1171] ? watchdog+0xa82/0x1000 [ 781.271707][ T1171] watchdog.cold+0x16/0x16b [ 781.276206][ T1171] ? reset_hung_task_detector+0x30/0x30 [ 781.281743][ T1171] kthread+0x3b5/0x4a0 [ 781.285812][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 781.290912][ T1171] ret_from_fork+0x1f/0x30 [ 781.296850][ T1171] Kernel Offset: disabled [ 781.301172][ T1171] Rebooting in 86400 seconds..