Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 505.831725][ T6881] IPVS: ftp: loaded support on port[0] = 21 [ 505.881678][ T6902] netlink: 8 bytes leftover after parsing attributes in process `syz-executor218'. [ 505.891979][ T6902] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor218'. [ 505.905445][ T6902] netlink: 8 bytes leftover after parsing attributes in process `syz-executor218'. [ 505.915408][ T6902] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor218'. [ 657.363649][ T1170] INFO: task kworker/0:0:5 blocked for more than 143 seconds. [ 657.371334][ T1170] Not tainted 5.9.0-rc8-syzkaller #0 [ 657.382136][ T1170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.391746][ T1170] task:kworker/0:0 state:D stack:27496 pid: 5 ppid: 2 flags:0x00004000 [ 657.402398][ T1170] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.410632][ T1170] Call Trace: [ 657.414766][ T1170] __schedule+0xec9/0x2280 [ 657.419230][ T1170] ? io_schedule_timeout+0x140/0x140 [ 657.426012][ T1170] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.432068][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.438932][ T1170] ? lockdep_hardirqs_on+0x53/0x100 [ 657.445048][ T1170] schedule+0xd0/0x2a0 [ 657.449144][ T1170] schedule_preempt_disabled+0xf/0x20 [ 657.455673][ T1170] __mutex_lock+0x3e2/0x10e0 [ 657.460736][ T1170] ? addrconf_verify_work+0xa/0x20 [ 657.467122][ T1170] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.472530][ T1170] ? lock_release+0x8f0/0x8f0 [ 657.479874][ T1170] ? lock_downgrade+0x830/0x830 [ 657.485542][ T1170] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.490866][ T1170] ? lock_is_held_type+0xbb/0xf0 [ 657.497137][ T1170] addrconf_verify_work+0xa/0x20 [ 657.502227][ T1170] process_one_work+0x94c/0x1670 [ 657.508682][ T1170] ? lock_release+0x8f0/0x8f0 [ 657.513407][ T1170] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.520092][ T1170] ? rwlock_bug.part.0+0x90/0x90 [ 657.525868][ T1170] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.531362][ T1170] worker_thread+0x64c/0x1120 [ 657.537302][ T1170] ? process_one_work+0x1670/0x1670 [ 657.543014][ T1170] kthread+0x3b5/0x4a0 [ 657.548868][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 657.555145][ T1170] ret_from_fork+0x1f/0x30 [ 657.559858][ T1170] [ 657.559858][ T1170] Showing all locks held in the system: [ 657.569300][ T1170] 3 locks held by kworker/0:0/5: [ 657.575978][ T1170] #0: ffff888099bf5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.587874][ T1170] #1: ffffc90000cbfda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.601316][ T1170] #2: ffffffff8b150948 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.613139][ T1170] 1 lock held by khungtaskd/1170: [ 657.619032][ T1170] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.630026][ T1170] 1 lock held by in:imklog/6578: [ 657.635796][ T1170] #0: ffff88809a205bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.645924][ T1170] 2 locks held by syz-executor218/6902: [ 657.657210][ T1170] [ 657.659758][ T1170] ============================================= [ 657.659758][ T1170] [ 657.670104][ T1170] NMI backtrace for cpu 0 [ 657.674668][ T1170] CPU: 0 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 657.683896][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.693959][ T1170] Call Trace: [ 657.697413][ T1170] dump_stack+0x198/0x1fd [ 657.701857][ T1170] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.707152][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.712810][ T1170] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.718936][ T1170] watchdog+0xd7d/0x1000 [ 657.723245][ T1170] ? reset_hung_task_detector+0x30/0x30 [ 657.728813][ T1170] kthread+0x3b5/0x4a0 [ 657.732895][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 657.738038][ T1170] ret_from_fork+0x1f/0x30 [ 657.742708][ T1170] Sending NMI from CPU 0 to CPUs 1: [ 657.749829][ C1] NMI backtrace for cpu 1 [ 657.749837][ C1] CPU: 1 PID: 6902 Comm: syz-executor218 Not tainted 5.9.0-rc8-syzkaller #0 [ 657.749843][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.749848][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 [ 657.749860][ C1] Code: 48 89 ef 5d e9 11 5f 40 00 5d be 03 00 00 00 e9 46 b9 49 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 48 8b 14 25 c0 fe 01 00 65 8b 05 60 bf 8b 7e a9 00 01 ff 00 48 [ 657.749865][ C1] RSP: 0018:ffffc900053e6cb8 EFLAGS: 00000246 [ 657.749874][ C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff83d85f24 [ 657.749879][ C1] RDX: 000000000000003f RSI: ffff888093a52280 RDI: 0000000000000006 [ 657.749885][ C1] RBP: 0000000000000003 R08: 0000000000000000 R09: ffff88809eef1e07 [ 657.749891][ C1] R10: 0000000000000003 R11: 0000000000000000 R12: ffff8880a9d0fb02 [ 657.749896][ C1] R13: ffff88809eef1ed8 R14: ffff88809eef1e00 R15: 0000000000000000 [ 657.749902][ C1] FS: 0000000000000000(0000) GS:ffff8880ae500000(0063) knlGS:0000000009078840 [ 657.749907][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 657.749913][ C1] CR2: 00007faea14ac020 CR3: 000000009442f000 CR4: 00000000001506e0 [ 657.749918][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.749924][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.749927][ C1] Call Trace: [ 657.749931][ C1] __radix_tree_lookup+0xef/0x290 [ 657.749935][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 657.749939][ C1] tcf_police_init+0x347/0x13a0 [ 657.749943][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.749947][ C1] ? find_held_lock+0x2d/0x110 [ 657.749952][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.749956][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.749960][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.749964][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.749968][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.749972][ C1] ? find_held_lock+0x2d/0x110 [ 657.749976][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.749979][ C1] ? mark_lock+0x82/0x1660 [ 657.749984][ C1] tcf_exts_validate+0x138/0x420 [ 657.749988][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.749992][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.749996][ C1] ? __nla_parse+0x3d/0x4a [ 657.750000][ C1] rsvp_change+0x291/0x2990 [ 657.750004][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750009][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750013][ C1] ? find_held_lock+0x2d/0x110 [ 657.750017][ C1] ? tc_new_tfilter+0x1be4/0x2130 [ 657.750021][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.750026][ C1] ? lock_downgrade+0x830/0x830 [ 657.750030][ C1] ? blackhole_dequeue+0x10/0x10 [ 657.750034][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750038][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.750043][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.750047][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.750052][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.750056][ C1] ? is_bpf_text_address+0xcb/0x160 [ 657.750060][ C1] ? kernel_text_address+0xbd/0xf0 [ 657.750065][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750069][ C1] ? security_capable+0x8f/0xc0 [ 657.750073][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750077][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.750082][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.750086][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.750090][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.750101][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.750105][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.750109][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.750113][ C1] ? netlink_ack+0xa10/0xa10 [ 657.750118][ C1] netlink_unicast+0x533/0x7d0 [ 657.750122][ C1] ? netlink_attachskb+0x810/0x810 [ 657.750126][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.750130][ C1] ? __check_object_size+0x171/0x3e4 [ 657.750135][ C1] netlink_sendmsg+0x856/0xd90 [ 657.750139][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.750143][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.750147][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.750151][ C1] sock_sendmsg+0xcf/0x120 [ 657.750155][ C1] ____sys_sendmsg+0x331/0x810 [ 657.750160][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.750164][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.750168][ C1] ? sock_alloc_file+0x4f/0x190 [ 657.750172][ C1] ? __sys_socket+0x13d/0x200 [ 657.750176][ C1] ? __ia32_sys_socket+0x6f/0xb0 [ 657.750181][ C1] ? __do_fast_syscall_32+0x60/0x90 [ 657.750185][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750189][ C1] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 657.750193][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.750198][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.750202][ C1] ? fs_reclaim_release+0x90/0xd0 [ 657.750206][ C1] ? lock_downgrade+0x830/0x830 [ 657.750210][ C1] ? mark_lock+0x82/0x1660 [ 657.750214][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750219][ C1] ? __lock_acquire+0xb92/0x5780 [ 657.750223][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750226][ C1] __sys_sendmmsg+0x296/0x480 [ 657.750230][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.750234][ C1] ? find_held_lock+0x2d/0x110 [ 657.750237][ C1] ? __fd_install+0x1b4/0x600 [ 657.750239][ C1] ? alloc_file_pseudo+0x1/0x250 [ 657.750242][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750244][ C1] ? __fd_install+0x1e6/0x600 [ 657.750246][ C1] ? __sys_socket+0x16d/0x200 [ 657.750248][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750251][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.750254][ C1] __ia32_compat_sys_sendmmsg+0x9b/0x100 [ 657.750256][ C1] ? lockdep_hardirqs_on+0x53/0x100 [ 657.750258][ C1] __do_fast_syscall_32+0x60/0x90 [ 657.750261][ C1] do_fast_syscall_32+0x2f/0x70 [ 657.750264][ C1] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 657.750266][ C1] RIP: 0023:0xf7f00549 [ 657.750273][ C1] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 657.750276][ C1] RSP: 002b:00000000ffc29d8c EFLAGS: 00000292 ORIG_RAX: 0000000000000159 [ 657.750282][ C1] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000200 [ 657.750286][ C1] RDX: 00000000924926d3 RSI: 0000000000000000 RDI: 0000000000000010 [ 657.750289][ C1] RBP: 0000000000080002 R08: 0000000000000000 R09: 0000000000000000 [ 657.750292][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 657.750296][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 657.750300][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.753025][ T1170] Kernel panic - not syncing: hung_task: blocked tasks [ 658.398811][ T1170] CPU: 0 PID: 1170 Comm: khungtaskd Not tainted 5.9.0-rc8-syzkaller #0 [ 658.407053][ T1170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.417120][ T1170] Call Trace: [ 658.420429][ T1170] dump_stack+0x198/0x1fd [ 658.424846][ T1170] panic+0x382/0x7fb [ 658.428779][ T1170] ? __warn_printk+0xf3/0xf3 [ 658.433402][ T1170] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.439050][ T1170] ? preempt_schedule_thunk+0x16/0x18 [ 658.445073][ T1170] ? watchdog.cold+0x5/0x16b [ 658.449679][ T1170] ? watchdog+0xa82/0x1000 [ 658.454116][ T1170] watchdog.cold+0x16/0x16b [ 658.458677][ T1170] ? reset_hung_task_detector+0x30/0x30 [ 658.465371][ T1170] kthread+0x3b5/0x4a0 [ 658.469580][ T1170] ? __kthread_bind_mask+0xc0/0xc0 [ 658.474815][ T1170] ret_from_fork+0x1f/0x30 [ 658.481118][ T1170] Kernel Offset: disabled [ 658.486004][ T1170] Rebooting in 86400 seconds..