Warning: Permanently added '10.128.0.174' (ECDSA) to the list of known hosts. executing program [ 503.289304][ T6878] IPVS: ftp: loaded support on port[0] = 21 [ 503.328752][ T6899] netlink: 8 bytes leftover after parsing attributes in process `syz-executor922'. [ 503.338323][ T6899] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor922'. [ 503.349596][ T6899] netlink: 8 bytes leftover after parsing attributes in process `syz-executor922'. [ 503.359214][ T6899] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor922'. [ 780.733668][ T1158] INFO: task kworker/1:2:2663 blocked for more than 143 seconds. [ 780.741532][ T1158] Not tainted 5.9.0-rc6-syzkaller #0 [ 780.751013][ T1158] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 780.760492][ T1158] task:kworker/1:2 state:D stack:27608 pid: 2663 ppid: 2 flags:0x00004000 [ 780.770815][ T1158] Workqueue: ipv6_addrconf addrconf_verify_work [ 780.777981][ T1158] Call Trace: [ 780.781311][ T1158] __schedule+0xec9/0x2280 [ 780.787003][ T1158] ? io_schedule_timeout+0x140/0x140 [ 780.792370][ T1158] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 780.799848][ T1158] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.806190][ T1158] ? lockdep_hardirqs_on+0x53/0x100 [ 780.811402][ T1158] schedule+0xd0/0x2a0 [ 780.816883][ T1158] schedule_preempt_disabled+0xf/0x20 [ 780.822268][ T1158] __mutex_lock+0x3e2/0x10e0 [ 780.828172][ T1158] ? addrconf_verify_work+0xa/0x20 [ 780.833299][ T1158] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.840101][ T1158] ? lock_release+0x8f0/0x8f0 [ 780.845600][ T1158] ? lock_downgrade+0x830/0x830 [ 780.850466][ T1158] ? _raw_spin_unlock_irq+0x1f/0x80 [ 780.857003][ T1158] ? lock_is_held_type+0xbb/0xf0 [ 780.861965][ T1158] addrconf_verify_work+0xa/0x20 [ 780.868370][ T1158] process_one_work+0x94c/0x1670 [ 780.873329][ T1158] ? lock_release+0x8f0/0x8f0 [ 780.880582][ T1158] ? pwq_dec_nr_in_flight+0x320/0x320 [ 780.886794][ T1158] ? rwlock_bug.part.0+0x90/0x90 [ 780.891743][ T1158] ? lockdep_hardirqs_off+0x96/0xd0 [ 780.899245][ T1158] worker_thread+0x64c/0x1120 [ 780.904747][ T1158] ? __kthread_parkme+0x13f/0x1e0 [ 780.909787][ T1158] ? process_one_work+0x1670/0x1670 [ 780.916298][ T1158] kthread+0x3b5/0x4a0 [ 780.920377][ T1158] ? __kthread_bind_mask+0xc0/0xc0 [ 780.926801][ T1158] ret_from_fork+0x1f/0x30 [ 780.931347][ T1158] [ 780.931347][ T1158] Showing all locks held in the system: [ 780.940427][ T1158] 1 lock held by khungtaskd/1158: [ 780.946783][ T1158] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 780.957881][ T1158] 3 locks held by kworker/1:2/2663: [ 780.963075][ T1158] #0: ffff88809a6dad38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 780.975367][ T1158] #1: ffffc90008c57da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 780.986522][ T1158] #2: ffffffff8b14d948 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 780.997128][ T1158] 1 lock held by in:imklog/6574: [ 781.002327][ T1158] #0: ffff8880a65d8630 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 781.014397][ T1158] 1 lock held by syz-executor922/6899: [ 781.019882][ T1158] [ 781.022204][ T1158] ============================================= [ 781.022204][ T1158] [ 781.032345][ T1158] NMI backtrace for cpu 0 [ 781.036781][ T1158] CPU: 0 PID: 1158 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 781.045017][ T1158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.055064][ T1158] Call Trace: [ 781.058449][ T1158] dump_stack+0x198/0x1fd [ 781.062791][ T1158] nmi_cpu_backtrace.cold+0x70/0xb1 [ 781.067992][ T1158] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 781.073635][ T1158] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 781.079668][ T1158] watchdog+0xd7d/0x1000 [ 781.083945][ T1158] ? reset_hung_task_detector+0x30/0x30 [ 781.089494][ T1158] kthread+0x3b5/0x4a0 [ 781.093751][ T1158] ? __kthread_bind_mask+0xc0/0xc0 [ 781.098896][ T1158] ret_from_fork+0x1f/0x30 [ 781.103501][ T1158] Sending NMI from CPU 0 to CPUs 1: [ 781.110274][ C1] NMI backtrace for cpu 1 [ 781.110281][ C1] CPU: 1 PID: 6899 Comm: syz-executor922 Not tainted 5.9.0-rc6-syzkaller #0 [ 781.110287][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.110292][ C1] RIP: 0010:arch_local_irq_restore+0x2e/0x50 [ 781.110303][ 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 21 7f a1 08 00 74 0c 48 89 df 57 9d <0f> 1f 44 00 00 5b c3 0f 0b 48 c7 c7 a8 6b fc 89 e8 3d 23 5c 00 eb [ 781.110308][ C1] RSP: 0018:ffffc90005336a88 EFLAGS: 00000286 [ 781.110316][ C1] RAX: 1ffffffff13f8d75 RBX: 0000000000000286 RCX: ffffffff815c091e [ 781.110322][ C1] RDX: dffffc0000000000 RSI: ffffffff8a067e40 RDI: 0000000000000286 [ 781.110327][ C1] RBP: ffff88808da14540 R08: 0000000000000000 R09: ffffffff8b596a4f [ 781.110333][ C1] R10: fffffbfff16b2d49 R11: 0000000000000000 R12: 0000000000000000 [ 781.110338][ C1] R13: ffff88808da14e28 R14: ffff88808da14e28 R15: 0000000000000286 [ 781.110344][ C1] FS: 0000000001520880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 781.110349][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 781.110354][ C1] CR2: 00007f7ed5664018 CR3: 00000000a91d4000 CR4: 00000000001506e0 [ 781.110360][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 781.110365][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 781.110368][ C1] Call Trace: [ 781.110372][ C1] lock_is_held_type+0xbb/0xf0 [ 781.110376][ C1] rcu_read_lock_sched_held+0x3a/0xb0 [ 781.110380][ C1] lock_acquire+0x843/0xaf0 [ 781.110384][ C1] ? lock_release+0x8f0/0x8f0 [ 781.110388][ C1] ? finish_task_switch+0x150/0x790 [ 781.110392][ C1] ? finish_task_switch+0x122/0x790 [ 781.110395][ C1] ? __switch_to+0x425/0xfe0 [ 781.110399][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110403][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110407][ C1] __mutex_lock+0x134/0x10e0 [ 781.110411][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 781.110415][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 781.110419][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 781.110423][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 781.110427][ C1] ? wait_for_completion+0x260/0x260 [ 781.110431][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 781.110435][ C1] tcf_police_init+0x347/0x13a0 [ 781.110439][ C1] ? tcf_police_cleanup+0x60/0x60 [ 781.110443][ C1] ? find_held_lock+0x2d/0x110 [ 781.110447][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 781.110451][ C1] tcf_action_init_1+0x1a3/0x990 [ 781.110455][ C1] ? tcf_action_dump_old+0x80/0x80 [ 781.110458][ C1] ? lock_acquire+0x1f3/0xaf0 [ 781.110462][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110466][ C1] ? find_held_lock+0x2d/0x110 [ 781.110470][ C1] ? fs_reclaim_release+0x90/0xd0 [ 781.110474][ C1] ? mark_lock+0x82/0x1660 [ 781.110478][ C1] tcf_exts_validate+0x138/0x420 [ 781.110481][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 781.110486][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 781.110489][ C1] ? __nla_parse+0x3d/0x4a [ 781.110493][ C1] rsvp_change+0x291/0x2990 [ 781.110497][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110501][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110504][ C1] ? find_held_lock+0x2d/0x110 [ 781.110508][ C1] ? tc_new_tfilter+0x1be4/0x2130 [ 781.110513][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 781.110516][ C1] ? lock_downgrade+0x830/0x830 [ 781.110520][ C1] ? blackhole_dequeue+0x10/0x10 [ 781.110524][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110528][ C1] tc_new_tfilter+0x1398/0x2130 [ 781.110532][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 781.110536][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 781.110541][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 781.110545][ C1] ? is_bpf_text_address+0xcb/0x160 [ 781.110549][ C1] ? kernel_text_address+0xbd/0xf0 [ 781.110553][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110556][ C1] ? security_capable+0x8f/0xc0 [ 781.110560][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110564][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 781.110568][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 781.110572][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 781.110576][ C1] ? lock_acquire+0x1f3/0xaf0 [ 781.110580][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 781.110584][ C1] netlink_rcv_skb+0x15a/0x430 [ 781.110588][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 781.110592][ C1] ? netlink_ack+0xa10/0xa10 [ 781.110596][ C1] netlink_unicast+0x533/0x7d0 [ 781.110600][ C1] ? netlink_attachskb+0x810/0x810 [ 781.110604][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 781.110608][ C1] ? __check_object_size+0x171/0x3e4 [ 781.110612][ C1] netlink_sendmsg+0x856/0xd90 [ 781.110615][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 781.110620][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 781.110623][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 781.110627][ C1] sock_sendmsg+0xcf/0x120 [ 781.110631][ C1] ____sys_sendmsg+0x331/0x810 [ 781.110635][ C1] ? kernel_sendmsg+0x50/0x50 [ 781.110639][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 781.110642][ C1] ? sock_alloc_file+0x4f/0x190 [ 781.110646][ C1] ? __lock_acquire+0x164a/0x5780 [ 781.110650][ C1] ___sys_sendmsg+0xf3/0x170 [ 781.110654][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 781.110658][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 781.110662][ C1] ? fs_reclaim_release+0x90/0xd0 [ 781.110666][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110670][ C1] ? find_held_lock+0x2d/0x110 [ 781.110674][ C1] ? __might_fault+0x11f/0x1d0 [ 781.110677][ C1] ? lock_downgrade+0x830/0x830 [ 781.110681][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110686][ C1] __sys_sendmmsg+0x195/0x480 [ 781.110690][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 781.110693][ C1] ? find_held_lock+0x2d/0x110 [ 781.110697][ C1] ? __fd_install+0x1b4/0x600 [ 781.110701][ C1] ? alloc_file_pseudo+0x1/0x250 [ 781.110705][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110709][ C1] ? __fd_install+0x1e6/0x600 [ 781.110713][ C1] ? __sys_socket+0x16d/0x200 [ 781.110717][ C1] ? lock_is_held_type+0xbb/0xf0 [ 781.110721][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 781.110725][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 781.110730][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 781.110734][ C1] do_syscall_64+0x2d/0x70 [ 781.110739][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 781.110742][ C1] RIP: 0033:0x4415a9 [ 781.110755][ 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 [ 781.110759][ C1] RSP: 002b:00007ffc259256a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 781.110769][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004415a9 [ 781.110775][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 781.110781][ C1] RBP: 00007ffc259256b0 R08: 0000000120080522 R09: 0000000120080522 [ 781.110787][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3bd0 [ 781.110792][ C1] R13: 0000000000402480 R14: 0000000000000000 R15: 0000000000000000 [ 781.110799][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 781.120952][ T1158] Kernel panic - not syncing: hung_task: blocked tasks [ 781.804992][ T1158] CPU: 0 PID: 1158 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 781.813243][ T1158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.824433][ T1158] Call Trace: [ 781.827736][ T1158] dump_stack+0x198/0x1fd [ 781.832074][ T1158] panic+0x382/0x7fb [ 781.836001][ T1158] ? __warn_printk+0xf3/0xf3 [ 781.841562][ T1158] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 781.847212][ T1158] ? preempt_schedule_thunk+0x16/0x18 [ 781.852591][ T1158] ? watchdog.cold+0x5/0x16b [ 781.857176][ T1158] ? watchdog+0xa82/0x1000 [ 781.861596][ T1158] watchdog.cold+0x16/0x16b [ 781.866114][ T1158] ? reset_hung_task_detector+0x30/0x30 [ 781.871690][ T1158] kthread+0x3b5/0x4a0 [ 781.875773][ T1158] ? __kthread_bind_mask+0xc0/0xc0 [ 781.880886][ T1158] ret_from_fork+0x1f/0x30 [ 781.886680][ T1158] Kernel Offset: disabled [ 781.891003][ T1158] Rebooting in 86400 seconds..