Warning: Permanently added '10.128.0.206' (ECDSA) to the list of known hosts. executing program [ 496.133049][ T6883] IPVS: ftp: loaded support on port[0] = 21 [ 496.176861][ T6905] netlink: 8 bytes leftover after parsing attributes in process `syz-executor770'. [ 496.187433][ T6905] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor770'. [ 496.199095][ T6905] netlink: 8 bytes leftover after parsing attributes in process `syz-executor770'. [ 496.208989][ T6905] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor770'. [ 657.216172][ T1176] INFO: task kworker/0:1:6875 blocked for more than 143 seconds. [ 657.224068][ T1176] Not tainted 5.9.0-rc8-syzkaller #0 [ 657.235550][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.245355][ T1176] task:kworker/0:1 state:D stack:29440 pid: 6875 ppid: 2 flags:0x00004000 [ 657.255865][ T1176] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.262280][ T1176] Call Trace: [ 657.265674][ T1176] __schedule+0xec9/0x2280 [ 657.272035][ T1176] ? io_schedule_timeout+0x140/0x140 [ 657.278439][ T1176] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.284513][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.291246][ T1176] ? lockdep_hardirqs_on+0x53/0x100 [ 657.297572][ T1176] schedule+0xd0/0x2a0 [ 657.301666][ T1176] schedule_preempt_disabled+0xf/0x20 [ 657.308466][ T1176] __mutex_lock+0x3e2/0x10e0 [ 657.313084][ T1176] ? addrconf_verify_work+0xa/0x20 [ 657.319781][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.325176][ T1176] ? lock_release+0x8f0/0x8f0 [ 657.331246][ T1176] ? lock_downgrade+0x830/0x830 [ 657.337025][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.342243][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 657.348527][ T1176] addrconf_verify_work+0xa/0x20 [ 657.353569][ T1176] process_one_work+0x94c/0x1670 [ 657.362148][ T1176] ? lock_release+0x8f0/0x8f0 [ 657.367788][ T1176] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.373254][ T1176] ? rwlock_bug.part.0+0x90/0x90 [ 657.379824][ T1176] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.385082][ T1176] worker_thread+0x64c/0x1120 [ 657.391376][ T1176] ? __kthread_parkme+0x13f/0x1e0 [ 657.397520][ T1176] ? process_one_work+0x1670/0x1670 [ 657.402748][ T1176] kthread+0x3b5/0x4a0 [ 657.408272][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 657.413601][ T1176] ret_from_fork+0x1f/0x30 [ 657.419657][ T1176] [ 657.419657][ T1176] Showing all locks held in the system: [ 657.428440][ T1176] 1 lock held by khungtaskd/1176: [ 657.433473][ T1176] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.445437][ T1176] 1 lock held by in:imklog/6596: [ 657.451474][ T1176] #0: ffff8880a8c418f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.462187][ T1176] 3 locks held by kworker/0:1/6875: [ 657.468227][ T1176] #0: ffff8880a8f54938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.480303][ T1176] #1: ffffc90001897da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.492914][ T1176] #2: ffffffff8b14f0c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.507399][ T1176] 2 locks held by syz-executor770/6905: [ 657.513013][ T1176] [ 657.515353][ T1176] ============================================= [ 657.515353][ T1176] [ 657.525711][ T1176] NMI backtrace for cpu 0 [ 657.530163][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 657.538399][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.548456][ T1176] Call Trace: [ 657.551876][ T1176] dump_stack+0x198/0x1fd [ 657.556233][ T1176] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.561496][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.567137][ T1176] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.573188][ T1176] watchdog+0xd7d/0x1000 [ 657.577443][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 657.582988][ T1176] kthread+0x3b5/0x4a0 [ 657.587062][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 657.592184][ T1176] ret_from_fork+0x1f/0x30 [ 657.596763][ T1176] Sending NMI from CPU 0 to CPUs 1: [ 657.603689][ C1] NMI backtrace for cpu 1 [ 657.603696][ C1] CPU: 1 PID: 6905 Comm: syz-executor770 Not tainted 5.9.0-rc8-syzkaller #0 [ 657.603709][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.603714][ C1] RIP: 0010:arch_local_irq_restore+0x2e/0x50 [ 657.603726][ C1] Code: 6b fc 89 53 48 89 fb 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 18 48 83 3d 11 7f a1 08 00 74 0c 48 89 df 57 9d <0f> 1f 44 00 00 5b c3 0f 0b 48 c7 c7 e8 6b fc 89 e8 2d 29 5c 00 eb [ 657.603731][ C1] RSP: 0018:ffffc90001606b60 EFLAGS: 00000286 [ 657.603740][ C1] RAX: 1ffffffff13f8d7d RBX: 0000000000000286 RCX: 0000000000000000 [ 657.603745][ C1] RDX: dffffc0000000000 RSI: ffffffff8a067e80 RDI: 0000000000000286 [ 657.603751][ C1] RBP: ffff888092ef2540 R08: ffffffff868adb58 R09: ffff8880a6f54207 [ 657.603757][ C1] R10: ffffed1014dea840 R11: 0000000000000000 R12: 0000000000000000 [ 657.603762][ C1] R13: ffff888092ef2e28 R14: ffff888092ef2e28 R15: 0000000000000286 [ 657.603768][ C1] FS: 0000000000937880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 657.603773][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.603779][ C1] CR2: 00000000006ce080 CR3: 000000008e81c000 CR4: 00000000001506e0 [ 657.603784][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.603790][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.603793][ C1] Call Trace: [ 657.603797][ C1] lock_is_held_type+0xbb/0xf0 [ 657.603801][ C1] ___might_sleep+0x268/0x2f0 [ 657.603805][ C1] __mutex_lock+0xa9/0x10e0 [ 657.603809][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.603814][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.603818][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 657.603822][ C1] ? wait_for_completion+0x260/0x260 [ 657.603826][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 657.603830][ C1] tcf_police_init+0x347/0x13a0 [ 657.603835][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.603839][ C1] ? find_held_lock+0x2d/0x110 [ 657.603843][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.603847][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.603851][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.603855][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.603859][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603863][ C1] ? find_held_lock+0x2d/0x110 [ 657.603867][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.603871][ C1] ? mark_lock+0x82/0x1660 [ 657.603875][ C1] tcf_exts_validate+0x138/0x420 [ 657.603879][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.603883][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.603887][ C1] ? __nla_parse+0x3d/0x4a [ 657.603891][ C1] rsvp_change+0x291/0x2990 [ 657.603895][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603899][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603903][ C1] ? find_held_lock+0x2d/0x110 [ 657.603907][ C1] ? tc_new_tfilter+0x1be4/0x2130 [ 657.603912][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.603916][ C1] ? lock_downgrade+0x830/0x830 [ 657.603920][ C1] ? blackhole_dequeue+0x10/0x10 [ 657.603924][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603928][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.603932][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.603936][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.603941][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.603945][ C1] ? is_bpf_text_address+0xcb/0x160 [ 657.603949][ C1] ? kernel_text_address+0xbd/0xf0 [ 657.603953][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603957][ C1] ? security_capable+0x8f/0xc0 [ 657.603961][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.603965][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.603970][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.603974][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.603978][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.603982][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.603987][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.603991][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.603995][ C1] ? netlink_ack+0xa10/0xa10 [ 657.603999][ C1] netlink_unicast+0x533/0x7d0 [ 657.604004][ C1] ? netlink_attachskb+0x810/0x810 [ 657.604008][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.604012][ C1] ? __check_object_size+0x171/0x3e4 [ 657.604017][ C1] netlink_sendmsg+0x856/0xd90 [ 657.604021][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.604025][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.604030][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.604034][ C1] sock_sendmsg+0xcf/0x120 [ 657.604038][ C1] ____sys_sendmsg+0x331/0x810 [ 657.604042][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.604046][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.604050][ C1] ? sock_alloc_file+0x4f/0x190 [ 657.604055][ C1] ? __lock_acquire+0x164a/0x5780 [ 657.604059][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.604063][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.604068][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.604072][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.604077][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.604081][ C1] ? find_held_lock+0x2d/0x110 [ 657.604085][ C1] ? __might_fault+0x11f/0x1d0 [ 657.604089][ C1] ? lock_downgrade+0x830/0x830 [ 657.604093][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.604097][ C1] __sys_sendmmsg+0x195/0x480 [ 657.604102][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.604106][ C1] ? find_held_lock+0x2d/0x110 [ 657.604110][ C1] ? __fd_install+0x1b4/0x600 [ 657.604114][ C1] ? alloc_file_pseudo+0x1/0x250 [ 657.604118][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.604123][ C1] ? __fd_install+0x1e6/0x600 [ 657.604127][ C1] ? __sys_socket+0x16d/0x200 [ 657.604131][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.604136][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.604140][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 657.604145][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.604149][ C1] do_syscall_64+0x2d/0x70 [ 657.604153][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.604157][ C1] RIP: 0033:0x441599 [ 657.604169][ 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 [ 657.604174][ C1] RSP: 002b:00007ffd7c1763a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.604184][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441599 [ 657.604190][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 657.604196][ C1] RBP: 00007ffd7c1763b0 R08: 0000000120080522 R09: 0000000120080522 [ 657.604202][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3bb0 [ 657.604208][ C1] R13: 0000000000402470 R14: 0000000000000000 R15: 0000000000000000 [ 657.604214][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.667059][ T1176] Kernel panic - not syncing: hung_task: blocked tasks [ 658.255499][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 658.263725][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.273774][ T1176] Call Trace: [ 658.277075][ T1176] dump_stack+0x198/0x1fd [ 658.281482][ T1176] panic+0x382/0x7fb [ 658.285382][ T1176] ? __warn_printk+0xf3/0xf3 [ 658.289983][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.295620][ T1176] ? preempt_schedule_thunk+0x16/0x18 [ 658.301005][ T1176] ? watchdog.cold+0x5/0x16b [ 658.305594][ T1176] ? watchdog+0xa82/0x1000 [ 658.310014][ T1176] watchdog.cold+0x16/0x16b [ 658.314519][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 658.320064][ T1176] kthread+0x3b5/0x4a0 [ 658.324133][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 658.329248][ T1176] ret_from_fork+0x1f/0x30 [ 658.334985][ T1176] Kernel Offset: disabled [ 658.339307][ T1176] Rebooting in 86400 seconds..