Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 506.159514][ T6881] IPVS: ftp: loaded support on port[0] = 21 [ 506.201684][ T6903] netlink: 8 bytes leftover after parsing attributes in process `syz-executor644'. [ 506.211748][ T6903] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor644'. [ 506.223776][ T6903] netlink: 8 bytes leftover after parsing attributes in process `syz-executor644'. [ 506.233614][ T6903] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor644'. [ 657.283631][ T1175] INFO: task kworker/0:0:5 blocked for more than 143 seconds. [ 657.291542][ T1175] Not tainted 5.9.0-rc8-syzkaller #0 [ 657.301120][ T1175] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.310741][ T1175] task:kworker/0:0 state:D stack:27608 pid: 5 ppid: 2 flags:0x00004000 [ 657.321108][ T1175] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.328435][ T1175] Call Trace: [ 657.331815][ T1175] __schedule+0xec9/0x2280 [ 657.339580][ T1175] ? io_schedule_timeout+0x140/0x140 [ 657.345714][ T1175] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.351871][ T1175] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.358356][ T1175] ? lockdep_hardirqs_on+0x53/0x100 [ 657.364385][ T1175] schedule+0xd0/0x2a0 [ 657.368475][ T1175] schedule_preempt_disabled+0xf/0x20 [ 657.374981][ T1175] __mutex_lock+0x3e2/0x10e0 [ 657.379589][ T1175] ? addrconf_verify_work+0xa/0x20 [ 657.385868][ T1175] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.391269][ T1175] ? lock_release+0x8f0/0x8f0 [ 657.397116][ T1175] ? lock_downgrade+0x830/0x830 [ 657.401989][ T1175] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.408344][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 657.413307][ T1175] addrconf_verify_work+0xa/0x20 [ 657.419596][ T1175] process_one_work+0x94c/0x1670 [ 657.425501][ T1175] ? lock_release+0x8f0/0x8f0 [ 657.430199][ T1175] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.436785][ T1175] ? rwlock_bug.part.0+0x90/0x90 [ 657.441742][ T1175] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.448244][ T1175] worker_thread+0x64c/0x1120 [ 657.452955][ T1175] ? process_one_work+0x1670/0x1670 [ 657.459344][ T1175] kthread+0x3b5/0x4a0 [ 657.463475][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 657.471072][ T1175] ret_from_fork+0x1f/0x30 [ 657.476410][ T1175] [ 657.476410][ T1175] Showing all locks held in the system: [ 657.484949][ T1175] 3 locks held by kworker/0:0/5: [ 657.490151][ T1175] #0: ffff888214d68938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.503118][ T1175] #1: ffffc90000cbfda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.514540][ T1175] #2: ffffffff8b14f0c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.525105][ T1175] 1 lock held by khungtaskd/1175: [ 657.530187][ T1175] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.541497][ T1175] 1 lock held by in:imklog/6551: [ 657.547311][ T1175] #0: ffff8880a7d36930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.557712][ T1175] 2 locks held by syz-executor644/6903: [ 657.563289][ T1175] [ 657.568237][ T1175] ============================================= [ 657.568237][ T1175] [ 657.577488][ T1175] NMI backtrace for cpu 0 [ 657.581837][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 657.590191][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.600550][ T1175] Call Trace: [ 657.604002][ T1175] dump_stack+0x198/0x1fd [ 657.608346][ T1175] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.613754][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.619396][ T1175] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.625597][ T1175] watchdog+0xd7d/0x1000 [ 657.629851][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 657.635408][ T1175] kthread+0x3b5/0x4a0 [ 657.639483][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 657.644680][ T1175] ret_from_fork+0x1f/0x30 [ 657.649302][ T1175] Sending NMI from CPU 0 to CPUs 1: [ 657.656191][ C1] NMI backtrace for cpu 1 [ 657.656197][ C1] CPU: 1 PID: 6903 Comm: syz-executor644 Not tainted 5.9.0-rc8-syzkaller #0 [ 657.656202][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.656206][ C1] RIP: 0010:__might_sleep+0x35/0x190 [ 657.656216][ C1] Code: 55 41 89 d5 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 c0 fe 01 00 48 8d 7b 10 48 83 ec 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 0b 01 00 00 48 8b 43 10 48 85 c0 74 3e 65 48 8b 1c 25 c0 fe [ 657.656219][ C1] RSP: 0018:ffffc9000557eba8 EFLAGS: 00000246 [ 657.656227][ C1] RAX: dffffc0000000000 RBX: ffff8880a8976140 RCX: 0000000000000000 [ 657.656231][ C1] RDX: 1ffff1101512ec2a RSI: 00000000000003a7 RDI: ffff8880a8976150 [ 657.656236][ C1] RBP: ffffffff888bc5c0 R08: ffffffff868adb58 R09: ffff88809f580a07 [ 657.656241][ C1] R10: ffffed1013eb0140 R11: 0000000000000000 R12: 00000000000003a7 [ 657.656245][ C1] R13: 0000000000000000 R14: ffff88809f580a00 R15: ffff88809f580a90 [ 657.656250][ C1] FS: 0000000001f6a880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 657.656254][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.656259][ C1] CR2: 0000000020000280 CR3: 00000000a388f000 CR4: 00000000001506e0 [ 657.656263][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.656268][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.656270][ C1] Call Trace: [ 657.656273][ C1] __mutex_lock+0xa9/0x10e0 [ 657.656276][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.656280][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.656283][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 657.656287][ C1] ? wait_for_completion+0x260/0x260 [ 657.656290][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 657.656293][ C1] tcf_police_init+0x347/0x13a0 [ 657.656296][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.656299][ C1] ? find_held_lock+0x2d/0x110 [ 657.656302][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.656305][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.656309][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.656312][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.656315][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656318][ C1] ? find_held_lock+0x2d/0x110 [ 657.656321][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.656324][ C1] ? mark_lock+0x82/0x1660 [ 657.656327][ C1] tcf_exts_validate+0x138/0x420 [ 657.656330][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.656334][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.656337][ C1] ? __nla_parse+0x3d/0x4a [ 657.656339][ C1] rsvp_change+0x291/0x2990 [ 657.656343][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656346][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656349][ C1] ? find_held_lock+0x2d/0x110 [ 657.656352][ C1] ? tc_new_tfilter+0x1be4/0x2130 [ 657.656355][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.656359][ C1] ? lock_downgrade+0x830/0x830 [ 657.656362][ C1] ? blackhole_dequeue+0x10/0x10 [ 657.656365][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656368][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.656372][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.656375][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.656378][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.656382][ C1] ? is_bpf_text_address+0xcb/0x160 [ 657.656385][ C1] ? kernel_text_address+0xbd/0xf0 [ 657.656389][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656392][ C1] ? security_capable+0x8f/0xc0 [ 657.656395][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656398][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.656401][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.656405][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.656408][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.656411][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.656414][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.656418][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.656420][ C1] ? netlink_ack+0xa10/0xa10 [ 657.656424][ C1] netlink_unicast+0x533/0x7d0 [ 657.656427][ C1] ? netlink_attachskb+0x810/0x810 [ 657.656430][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.656433][ C1] ? __check_object_size+0x171/0x3e4 [ 657.656436][ C1] netlink_sendmsg+0x856/0xd90 [ 657.656439][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.656443][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.656446][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.656449][ C1] sock_sendmsg+0xcf/0x120 [ 657.656452][ C1] ____sys_sendmsg+0x331/0x810 [ 657.656455][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.656458][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.656461][ C1] ? sock_alloc_file+0x4f/0x190 [ 657.656464][ C1] ? __lock_acquire+0x164a/0x5780 [ 657.656467][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.656471][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.656474][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.656478][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.656481][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656484][ C1] ? find_held_lock+0x2d/0x110 [ 657.656487][ C1] ? __might_fault+0x11f/0x1d0 [ 657.656490][ C1] ? lock_downgrade+0x830/0x830 [ 657.656493][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656496][ C1] __sys_sendmmsg+0x195/0x480 [ 657.656499][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.656502][ C1] ? find_held_lock+0x2d/0x110 [ 657.656505][ C1] ? __fd_install+0x1b4/0x600 [ 657.656509][ C1] ? alloc_file_pseudo+0x1/0x250 [ 657.656512][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656515][ C1] ? __fd_install+0x1e6/0x600 [ 657.656518][ C1] ? __sys_socket+0x16d/0x200 [ 657.656521][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.656524][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.656528][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 657.656531][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.656534][ C1] do_syscall_64+0x2d/0x70 [ 657.656538][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.656541][ C1] RIP: 0033:0x441599 [ 657.656551][ 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 [ 657.656554][ C1] RSP: 002b:00007fffdacee088 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.656562][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441599 [ 657.656567][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 657.656571][ C1] RBP: 00007fffdacee090 R08: 0000000120080522 R09: 0000000120080522 [ 657.656576][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3bb0 [ 657.656580][ C1] R13: 0000000000402470 R14: 0000000000000000 R15: 0000000000000000 [ 657.656586][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.683502][ T1175] Kernel panic - not syncing: hung_task: blocked tasks [ 658.302645][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 658.310884][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.320940][ T1175] Call Trace: [ 658.324354][ T1175] dump_stack+0x198/0x1fd [ 658.328797][ T1175] panic+0x382/0x7fb [ 658.332706][ T1175] ? __warn_printk+0xf3/0xf3 [ 658.337314][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.342952][ T1175] ? preempt_schedule_thunk+0x16/0x18 [ 658.348332][ T1175] ? watchdog.cold+0x5/0x16b [ 658.352926][ T1175] ? watchdog+0xa82/0x1000 [ 658.357352][ T1175] watchdog.cold+0x16/0x16b [ 658.361871][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 658.367422][ T1175] kthread+0x3b5/0x4a0 [ 658.371498][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 658.376619][ T1175] ret_from_fork+0x1f/0x30 [ 658.382885][ T1175] Kernel Offset: disabled [ 658.387431][ T1175] Rebooting in 86400 seconds..