Warning: Permanently added '10.128.0.179' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 500.426166][ T6860] IPVS: ftp: loaded support on port[0] = 21 [ 500.466199][ T6881] netlink: 388 bytes leftover after parsing attributes in process `syz-executor332'. [ 500.482871][ T6882] netlink: 388 bytes leftover after parsing attributes in process `syz-executor332'. [ 657.241109][ T1168] INFO: task kworker/1:0:17 blocked for more than 143 seconds. [ 657.248839][ T1168] Not tainted 5.9.0-rc8-syzkaller #0 [ 657.260718][ T1168] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.270319][ T1168] task:kworker/1:0 state:D stack:28560 pid: 17 ppid: 2 flags:0x00004000 [ 657.280487][ T1168] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.287563][ T1168] Call Trace: [ 657.290894][ T1168] __schedule+0xec9/0x2280 [ 657.296520][ T1168] ? io_schedule_timeout+0x140/0x140 [ 657.302579][ T1168] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.308563][ T1168] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.314917][ T1168] ? lockdep_hardirqs_on+0x53/0x100 [ 657.320119][ T1168] schedule+0xd0/0x2a0 [ 657.325318][ T1168] schedule_preempt_disabled+0xf/0x20 [ 657.330689][ T1168] __mutex_lock+0x3e2/0x10e0 [ 657.336355][ T1168] ? addrconf_verify_work+0xa/0x20 [ 657.342245][ T1168] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.347711][ T1168] ? lock_release+0x8f0/0x8f0 [ 657.353512][ T1168] ? lock_downgrade+0x830/0x830 [ 657.358371][ T1168] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.364674][ T1168] ? lock_is_held_type+0xbb/0xf0 [ 657.369617][ T1168] addrconf_verify_work+0xa/0x20 [ 657.375640][ T1168] process_one_work+0x94c/0x1670 [ 657.380589][ T1168] ? lock_release+0x8f0/0x8f0 [ 657.387453][ T1168] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.393526][ T1168] ? rwlock_bug.part.0+0x90/0x90 [ 657.398470][ T1168] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.404789][ T1168] worker_thread+0x64c/0x1120 [ 657.409483][ T1168] ? process_one_work+0x1670/0x1670 [ 657.415802][ T1168] kthread+0x3b5/0x4a0 [ 657.419879][ T1168] ? __kthread_bind_mask+0xc0/0xc0 [ 657.426107][ T1168] ret_from_fork+0x1f/0x30 [ 657.430659][ T1168] [ 657.430659][ T1168] Showing all locks held in the system: [ 657.439519][ T1168] 3 locks held by kworker/1:0/17: [ 657.445279][ T1168] #0: ffff888214ff3138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.457430][ T1168] #1: ffffc90000d8fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.469409][ T1168] #2: ffffffff8b17a448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.479795][ T1168] 1 lock held by khungtaskd/1168: [ 657.485862][ T1168] #0: ffffffff8a068480 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.496440][ T1168] 1 lock held by in:imklog/6545: [ 657.502054][ T1168] #0: ffff8880a727faf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.513146][ T1168] 1 lock held by syz-executor332/6882: [ 657.518625][ T1168] [ 657.522120][ T1168] ============================================= [ 657.522120][ T1168] [ 657.530526][ T1168] NMI backtrace for cpu 0 [ 657.534934][ T1168] CPU: 0 PID: 1168 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 657.543155][ T1168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.553195][ T1168] Call Trace: [ 657.556575][ T1168] dump_stack+0x198/0x1fd [ 657.560905][ T1168] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.566111][ T1168] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.571751][ T1168] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.577728][ T1168] watchdog+0xd7d/0x1000 [ 657.581970][ T1168] ? reset_hung_task_detector+0x30/0x30 [ 657.587508][ T1168] kthread+0x3b5/0x4a0 [ 657.591570][ T1168] ? __kthread_bind_mask+0xc0/0xc0 [ 657.596674][ T1168] ret_from_fork+0x1f/0x30 [ 657.601246][ T1168] Sending NMI from CPU 0 to CPUs 1: [ 657.607731][ C1] NMI backtrace for cpu 1 [ 657.607738][ C1] CPU: 1 PID: 6882 Comm: syz-executor332 Not tainted 5.9.0-rc8-syzkaller #0 [ 657.607745][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.607749][ C1] RIP: 0010:__lock_acquire+0x483/0x5780 [ 657.607761][ C1] Code: 41 81 e5 ff 1f 45 0f b7 ed be 08 00 00 00 4c 89 e8 48 c1 f8 06 48 8d 3c c5 e0 f9 10 8d e8 75 64 5c 00 4c 0f a3 2d cd 3a b5 0b <0f> 83 dc 0b 00 00 4d 69 ed b8 00 00 00 49 81 c5 00 fe 10 8d 48 b8 [ 657.607765][ C1] RSP: 0018:ffffc90000e36a50 EFLAGS: 00000047 [ 657.607773][ C1] RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815bbf0b [ 657.607778][ C1] RDX: fffffbfff1a21f55 RSI: 0000000000000008 RDI: ffffffff8d10faa0 [ 657.607783][ C1] RBP: ffff888088c28180 R08: 0000000000000000 R09: ffffffff8d10faa7 [ 657.607789][ C1] R10: fffffbfff1a21f54 R11: 0000000000000000 R12: ffff888088c28ab0 [ 657.607794][ C1] R13: 000000000000060d R14: 0000000000000003 R15: 0000000000040000 [ 657.607800][ C1] FS: 0000000001cc6880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 657.607804][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.607809][ C1] CR2: 00007fe204b46000 CR3: 00000000a8fd3000 CR4: 00000000001506e0 [ 657.607815][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.607820][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.607823][ C1] Call Trace: [ 657.607826][ C1] ? _raw_spin_unlock_irq+0x55/0x80 [ 657.607830][ C1] ? finish_task_switch+0x150/0x790 [ 657.607834][ C1] ? finish_task_switch+0x122/0x790 [ 657.607838][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.607841][ C1] ? __schedule+0xed1/0x2280 [ 657.607844][ C1] lock_acquire+0x1f3/0xaf0 [ 657.607848][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.607851][ C1] ? lock_release+0x8f0/0x8f0 [ 657.607855][ C1] ? preempt_schedule_thunk+0x16/0x18 [ 657.607859][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.607862][ C1] __mutex_lock+0x134/0x10e0 [ 657.607865][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.607869][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.607873][ C1] ? tcf_idr_check_alloc+0xc2/0x3b0 [ 657.607876][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.607880][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 657.607884][ C1] ? wait_for_completion+0x260/0x260 [ 657.607887][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 657.607891][ C1] tcf_police_init+0x347/0x13a0 [ 657.607894][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.607898][ C1] ? find_held_lock+0x2d/0x110 [ 657.607901][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.607905][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.607908][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.607912][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.607915][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.607919][ C1] ? find_held_lock+0x2d/0x110 [ 657.607922][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.607925][ C1] ? mark_lock+0x82/0x1660 [ 657.607929][ C1] tcf_exts_validate+0x138/0x420 [ 657.607932][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.607936][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.607939][ C1] ? __nla_parse+0x3d/0x4a [ 657.607943][ C1] route4_change+0x6d8/0x2380 [ 657.607946][ C1] ? route4_delete+0xb70/0xb70 [ 657.607950][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.607953][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.607956][ C1] ? route4_delete+0xb70/0xb70 [ 657.607960][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.607964][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.607968][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.607971][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.607975][ C1] ? security_capable+0x8f/0xc0 [ 657.607978][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.607982][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.607985][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.607989][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.607992][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.607996][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.607999][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.608003][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.608006][ C1] ? netlink_ack+0xa10/0xa10 [ 657.608010][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 657.608014][ C1] netlink_unicast+0x533/0x7d0 [ 657.608017][ C1] ? netlink_attachskb+0x810/0x810 [ 657.608021][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.608025][ C1] ? __check_object_size+0x171/0x3e4 [ 657.608028][ C1] netlink_sendmsg+0x856/0xd90 [ 657.608032][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.608035][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.608039][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.608042][ C1] sock_sendmsg+0xcf/0x120 [ 657.608045][ C1] ____sys_sendmsg+0x331/0x810 [ 657.608048][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.608052][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.608055][ C1] ? sock_alloc_file+0x4f/0x190 [ 657.608058][ C1] ? __lock_acquire+0x164a/0x5780 [ 657.608062][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.608065][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.608069][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.608073][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.608077][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608080][ C1] ? find_held_lock+0x2d/0x110 [ 657.608083][ C1] ? __might_fault+0x11f/0x1d0 [ 657.608087][ C1] ? lock_downgrade+0x830/0x830 [ 657.608090][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608094][ C1] __sys_sendmmsg+0x195/0x480 [ 657.608097][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.608101][ C1] ? find_held_lock+0x2d/0x110 [ 657.608104][ C1] ? __fd_install+0x1b4/0x600 [ 657.608107][ C1] ? alloc_file_pseudo+0x1/0x250 [ 657.608111][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608114][ C1] ? __fd_install+0x1e6/0x600 [ 657.608117][ C1] ? __sys_socket+0x16d/0x200 [ 657.608121][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.608125][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.608128][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 657.608132][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.608136][ C1] do_syscall_64+0x2d/0x70 [ 657.608140][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.608143][ C1] RIP: 0033:0x441599 [ 657.608154][ 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 [ 657.608158][ C1] RSP: 002b:00007ffd584d6fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.608168][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441599 [ 657.608173][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 657.608178][ C1] RBP: 00007ffd584d6fc0 R08: 0000000100000000 R09: 0000000100000000 [ 657.608183][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000007a317 [ 657.608189][ C1] R13: 0000000000402470 R14: 0000000000000000 R15: 0000000000000000 [ 657.608195][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.617912][ T1168] Kernel panic - not syncing: hung_task: blocked tasks [ 658.281420][ T1168] CPU: 0 PID: 1168 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 658.289641][ T1168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.299681][ T1168] Call Trace: [ 658.302969][ T1168] dump_stack+0x198/0x1fd [ 658.307300][ T1168] panic+0x382/0x7fb [ 658.311187][ T1168] ? __warn_printk+0xf3/0xf3 [ 658.315770][ T1168] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.321398][ T1168] ? preempt_schedule_thunk+0x16/0x18 [ 658.326760][ T1168] ? watchdog.cold+0x5/0x16b [ 658.331343][ T1168] ? watchdog+0xa82/0x1000 [ 658.335752][ T1168] watchdog.cold+0x16/0x16b [ 658.340252][ T1168] ? reset_hung_task_detector+0x30/0x30 [ 658.345787][ T1168] kthread+0x3b5/0x4a0 [ 658.349848][ T1168] ? __kthread_bind_mask+0xc0/0xc0 [ 658.354956][ T1168] ret_from_fork+0x1f/0x30 [ 658.360447][ T1168] Kernel Offset: disabled [ 658.364803][ T1168] Rebooting in 86400 seconds..