Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts. executing program [ 517.675603][ T6898] IPVS: ftp: loaded support on port[0] = 21 [ 780.236687][ T1174] INFO: task kworker/1:1:6890 blocked for more than 143 seconds. [ 780.244588][ T1174] Not tainted 5.9.0-rc6-syzkaller #0 [ 780.252628][ T1174] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 780.262448][ T1174] task:kworker/1:1 state:D stack:30176 pid: 6890 ppid: 2 flags:0x00004000 [ 780.272795][ T1174] Workqueue: ipv6_addrconf addrconf_verify_work [ 780.281094][ T1174] Call Trace: [ 780.284485][ T1174] __schedule+0xec9/0x2280 [ 780.290172][ T1174] ? io_schedule_timeout+0x140/0x140 [ 780.295574][ T1174] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 780.304042][ T1174] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.310409][ T1174] ? lockdep_hardirqs_on+0x53/0x100 [ 780.315629][ T1174] schedule+0xd0/0x2a0 [ 780.320922][ T1174] schedule_preempt_disabled+0xf/0x20 [ 780.327328][ T1174] __mutex_lock+0x3e2/0x10e0 [ 780.331937][ T1174] ? addrconf_verify_work+0xa/0x20 [ 780.338265][ T1174] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.343655][ T1174] ? lock_release+0x8f0/0x8f0 [ 780.349938][ T1174] ? lock_downgrade+0x830/0x830 [ 780.354830][ T1174] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.361378][ T1174] ? lock_is_held_type+0xbb/0xf0 [ 780.366339][ T1174] addrconf_verify_work+0xa/0x20 [ 780.372612][ T1174] process_one_work+0x94c/0x1670 [ 780.378505][ T1174] ? lock_release+0x8f0/0x8f0 [ 780.383197][ T1174] ? pwq_dec_nr_in_flight+0x320/0x320 [ 780.389997][ T1174] ? rwlock_bug.part.0+0x90/0x90 [ 780.394965][ T1174] ? lockdep_hardirqs_off+0x96/0xd0 [ 780.401506][ T1174] worker_thread+0x64c/0x1120 [ 780.406262][ T1174] ? __kthread_parkme+0x13f/0x1e0 [ 780.413647][ T1174] ? process_one_work+0x1670/0x1670 [ 780.419684][ T1174] kthread+0x3b5/0x4a0 [ 780.423765][ T1174] ? __kthread_bind_mask+0xc0/0xc0 [ 780.430165][ T1174] ret_from_fork+0x1f/0x30 [ 780.434690][ T1174] [ 780.434690][ T1174] Showing all locks held in the system: [ 780.443777][ T1174] 1 lock held by khungtaskd/1174: [ 780.449662][ T1174] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 780.461183][ T1174] 1 lock held by in:imklog/6572: [ 780.466124][ T1174] #0: ffff88809519ab70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 780.476792][ T1174] 3 locks held by kworker/1:1/6890: [ 780.481985][ T1174] #0: ffff888214d62538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 780.494179][ T1174] #1: ffffc90005787da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 780.506582][ T1174] #2: ffffffff8b14d648 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 780.515987][ T1174] 1 lock held by syz-executor340/6920: [ 780.522777][ T1174] [ 780.525111][ T1174] ============================================= [ 780.525111][ T1174] [ 780.534908][ T1174] NMI backtrace for cpu 0 [ 780.539392][ T1174] CPU: 0 PID: 1174 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 780.547628][ T1174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.557674][ T1174] Call Trace: [ 780.561094][ T1174] dump_stack+0x198/0x1fd [ 780.565428][ T1174] nmi_cpu_backtrace.cold+0x70/0xb1 [ 780.570724][ T1174] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 780.576352][ T1174] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 780.582363][ T1174] watchdog+0xd7d/0x1000 [ 780.586609][ T1174] ? reset_hung_task_detector+0x30/0x30 [ 780.592158][ T1174] kthread+0x3b5/0x4a0 [ 780.596225][ T1174] ? __kthread_bind_mask+0xc0/0xc0 [ 780.601358][ T1174] ret_from_fork+0x1f/0x30 [ 780.605930][ T1174] Sending NMI from CPU 0 to CPUs 1: [ 780.612889][ C1] NMI backtrace for cpu 1 [ 780.612896][ C1] CPU: 1 PID: 6920 Comm: syz-executor340 Not tainted 5.9.0-rc6-syzkaller #0 [ 780.612903][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 780.612907][ C1] RIP: 0010:__lock_acquire+0x6a7/0x5780 [ 780.612918][ C1] Code: 00 66 85 c0 74 08 66 41 39 c5 44 0f 4f e8 48 8b 04 24 83 c3 01 48 c1 e8 03 42 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 43 31 00 00 <3b> 9d e0 08 00 00 0f 8d 9d 00 00 00 48 63 c3 48 8d 04 80 4d 8d 24 [ 780.612922][ C1] RSP: 0018:ffffc9000539e998 EFLAGS: 00000046 [ 780.612930][ C1] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815ba194 [ 780.612935][ C1] RDX: ffffffff8d0cb4c0 RSI: 0000000000000008 RDI: ffffffff8d0cb570 [ 780.612941][ C1] RBP: ffff888091e665c0 R08: 0000000000000000 R09: ffffffff8d0c09ff [ 780.612946][ C1] R10: fffffbfff1a1813f R11: 0000000000000000 R12: 00000000000000e8 [ 780.612951][ C1] R13: 0000000000000003 R14: dffffc0000000000 R15: ffff888091e66ea8 [ 780.612957][ C1] FS: 00000000014f4880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 780.612961][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 780.612967][ C1] CR2: 0000000020000280 CR3: 0000000095abe000 CR4: 00000000001506e0 [ 780.612972][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 780.612977][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 780.612980][ C1] Call Trace: [ 780.612983][ C1] ? lockdep_hardirqs_on+0x53/0x100 [ 780.612987][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.612991][ C1] lock_acquire+0x1f3/0xaf0 [ 780.612994][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 780.612998][ C1] ? lock_release+0x8f0/0x8f0 [ 780.613001][ C1] ? mark_lock+0x82/0x1660 [ 780.613004][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613007][ C1] __mutex_lock+0x134/0x10e0 [ 780.613011][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 780.613014][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 780.613019][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 780.613022][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.613026][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 780.613030][ C1] ? kcov_common_handle+0x20/0x20 [ 780.613033][ C1] ? wait_for_completion+0x260/0x260 [ 780.613037][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 780.613040][ C1] tcf_police_init+0x347/0x13a0 [ 780.613044][ C1] ? tcf_police_cleanup+0x60/0x60 [ 780.613047][ C1] ? find_held_lock+0x2d/0x110 [ 780.613051][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 780.613054][ C1] ? mark_held_locks+0x9f/0xe0 [ 780.613058][ C1] ? check_preemption_disabled+0x50/0x130 [ 780.613061][ C1] tcf_action_init_1+0x1a3/0x990 [ 780.613065][ C1] ? tcf_action_dump_old+0x80/0x80 [ 780.613068][ C1] ? kasan_save_stack+0x32/0x40 [ 780.613072][ C1] ? kasan_save_stack+0x1b/0x40 [ 780.613076][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 780.613079][ C1] ? kmem_cache_alloc_trace+0x174/0x300 [ 780.613083][ C1] ? fw_change+0x4b5/0x13e0 [ 780.613086][ C1] ? tc_new_tfilter+0x1398/0x2130 [ 780.613089][ C1] ? rtnetlink_rcv_msg+0x80f/0xad0 [ 780.613093][ C1] ? netlink_rcv_skb+0x15a/0x430 [ 780.613096][ C1] ? netlink_unicast+0x533/0x7d0 [ 780.613100][ C1] ? netlink_sendmsg+0x856/0xd90 [ 780.613103][ C1] ? sock_sendmsg+0xcf/0x120 [ 780.613106][ C1] ? ____sys_sendmsg+0x331/0x810 [ 780.613110][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 780.613113][ C1] ? __sys_sendmmsg+0x195/0x480 [ 780.613117][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 780.613120][ C1] ? do_syscall_64+0x2d/0x70 [ 780.613124][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.613128][ C1] tcf_exts_validate+0x138/0x420 [ 780.613131][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 780.613134][ C1] ? mark_lock+0x82/0x1660 [ 780.613138][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613141][ C1] fw_set_parms+0x13d/0xa30 [ 780.613145][ C1] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 780.613148][ C1] ? fw_delete+0x8c0/0x8c0 [ 780.613152][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 780.613155][ C1] ? __nla_parse+0x3d/0x4a [ 780.613158][ C1] fw_change+0x57e/0x13e0 [ 780.613160][ C1] ? lock_downgrade+0x830/0x830 [ 780.613163][ C1] ? fw_set_parms+0xa30/0xa30 [ 780.613166][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613169][ C1] tc_new_tfilter+0x1398/0x2130 [ 780.613172][ C1] ? fw_set_parms+0xa30/0xa30 [ 780.613175][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 780.613179][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.613182][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.613185][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613188][ C1] ? security_capable+0x8f/0xc0 [ 780.613191][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613194][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 780.613197][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 780.613200][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 780.613203][ C1] ? lock_acquire+0x1f3/0xaf0 [ 780.613206][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 780.613209][ C1] netlink_rcv_skb+0x15a/0x430 [ 780.613213][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 780.613216][ C1] ? netlink_ack+0xa10/0xa10 [ 780.613219][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 780.613222][ C1] netlink_unicast+0x533/0x7d0 [ 780.613225][ C1] ? netlink_attachskb+0x810/0x810 [ 780.613228][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 780.613231][ C1] ? __check_object_size+0x171/0x3e4 [ 780.613234][ C1] netlink_sendmsg+0x856/0xd90 [ 780.613237][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 780.613240][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 780.613243][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 780.613246][ C1] sock_sendmsg+0xcf/0x120 [ 780.613249][ C1] ____sys_sendmsg+0x331/0x810 [ 780.613252][ C1] ? kernel_sendmsg+0x50/0x50 [ 780.613255][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 780.613258][ C1] ? __lock_acquire+0x164a/0x5780 [ 780.613260][ C1] ___sys_sendmsg+0xf3/0x170 [ 780.613263][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 780.613267][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 780.613270][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613273][ C1] ? find_held_lock+0x2d/0x110 [ 780.613276][ C1] ? __might_fault+0x11f/0x1d0 [ 780.613279][ C1] ? lock_downgrade+0x830/0x830 [ 780.613282][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613285][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613288][ C1] __sys_sendmmsg+0x195/0x480 [ 780.613291][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 780.613294][ C1] ? __might_fault+0x190/0x1d0 [ 780.613297][ C1] ? _copy_to_user+0x126/0x160 [ 780.613300][ C1] ? sockfd_lookup_light+0xc6/0x180 [ 780.613303][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 780.613306][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 780.613309][ C1] ? lock_is_held_type+0xbb/0xf0 [ 780.613312][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 780.613315][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 780.613319][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 780.613322][ C1] do_syscall_64+0x2d/0x70 [ 780.613325][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 780.613328][ C1] RIP: 0033:0x441579 [ 780.613337][ 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 [ 780.613341][ C1] RSP: 002b:00007fff4ef327d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 780.613349][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441579 [ 780.613353][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 780.613358][ C1] RBP: 00007fff4ef327e0 R08: 0000000120080522 R09: 0000000120080522 [ 780.613362][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2930 [ 780.613367][ C1] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 780.613372][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 780.672173][ T1174] Kernel panic - not syncing: hung_task: blocked tasks [ 781.370488][ T1174] CPU: 0 PID: 1174 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 781.378730][ T1174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.388797][ T1174] Call Trace: [ 781.392100][ T1174] dump_stack+0x198/0x1fd [ 781.396520][ T1174] panic+0x382/0x7fb [ 781.400438][ T1174] ? __warn_printk+0xf3/0xf3 [ 781.405029][ T1174] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 781.410660][ T1174] ? preempt_schedule_thunk+0x16/0x18 [ 781.416035][ T1174] ? watchdog.cold+0x5/0x16b [ 781.420618][ T1174] ? watchdog+0xa82/0x1000 [ 781.425135][ T1174] watchdog.cold+0x16/0x16b [ 781.429640][ T1174] ? reset_hung_task_detector+0x30/0x30 [ 781.435183][ T1174] kthread+0x3b5/0x4a0 [ 781.439247][ T1174] ? __kthread_bind_mask+0xc0/0xc0 [ 781.444357][ T1174] ret_from_fork+0x1f/0x30 [ 781.450673][ T1174] Kernel Offset: disabled [ 781.455005][ T1174] Rebooting in 86400 seconds..