Warning: Permanently added '10.128.1.4' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 502.849168][ T6858] IPVS: ftp: loaded support on port[0] = 21 [ 502.891388][ T6879] netlink: 8 bytes leftover after parsing attributes in process `syz-executor557'. [ 502.901177][ T6879] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor557'. [ 502.913556][ T6879] netlink: 8 bytes leftover after parsing attributes in process `syz-executor557'. [ 502.923687][ T6879] netlink: 5212 bytes leftover after parsing attributes in process `syz-executor557'. [ 657.196204][ T1179] INFO: task kworker/0:3:3939 blocked for more than 143 seconds. [ 657.204103][ T1179] Not tainted 5.9.0-rc6-syzkaller #0 [ 657.215015][ T1179] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.224795][ T1179] task:kworker/0:3 state:D stack:28664 pid: 3939 ppid: 2 flags:0x00004000 [ 657.235064][ T1179] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.242276][ T1179] Call Trace: [ 657.245706][ T1179] __schedule+0xec9/0x2280 [ 657.251538][ T1179] ? io_schedule_timeout+0x140/0x140 [ 657.257872][ T1179] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.263896][ T1179] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.270444][ T1179] ? lockdep_hardirqs_on+0x53/0x100 [ 657.275654][ T1179] schedule+0xd0/0x2a0 [ 657.281140][ T1179] schedule_preempt_disabled+0xf/0x20 [ 657.288241][ T1179] __mutex_lock+0x3e2/0x10e0 [ 657.292953][ T1179] ? addrconf_verify_work+0xa/0x20 [ 657.299530][ T1179] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.304931][ T1179] ? lock_release+0x8f0/0x8f0 [ 657.310975][ T1179] ? lock_downgrade+0x830/0x830 [ 657.315846][ T1179] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.322440][ T1179] ? lock_is_held_type+0xbb/0xf0 [ 657.328215][ T1179] addrconf_verify_work+0xa/0x20 [ 657.333270][ T1179] process_one_work+0x94c/0x1670 [ 657.340729][ T1179] ? lock_release+0x8f0/0x8f0 [ 657.345421][ T1179] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.352177][ T1179] ? rwlock_bug.part.0+0x90/0x90 [ 657.358083][ T1179] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.363297][ T1179] worker_thread+0x64c/0x1120 [ 657.369400][ T1179] ? __kthread_parkme+0x13f/0x1e0 [ 657.374450][ T1179] ? process_one_work+0x1670/0x1670 [ 657.381161][ T1179] kthread+0x3b5/0x4a0 [ 657.385247][ T1179] ? __kthread_bind_mask+0xc0/0xc0 [ 657.391913][ T1179] ret_from_fork+0x1f/0x30 [ 657.397490][ T1179] [ 657.397490][ T1179] Showing all locks held in the system: [ 657.405252][ T1179] 1 lock held by khungtaskd/1179: [ 657.411824][ T1179] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.423124][ T1179] 3 locks held by kworker/0:3/3939: [ 657.429111][ T1179] #0: ffff888214f09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.441177][ T1179] #1: ffffc90005337da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.452337][ T1179] #2: ffffffff8b14d648 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.462810][ T1179] 1 lock held by in:imklog/6552: [ 657.469743][ T1179] #0: ffff88809e5d71b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.479803][ T1179] 1 lock held by syz-executor557/6879: [ 657.485286][ T1179] [ 657.488810][ T1179] ============================================= [ 657.488810][ T1179] [ 657.498200][ T1179] NMI backtrace for cpu 1 [ 657.502539][ T1179] CPU: 1 PID: 1179 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 657.510762][ T1179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.520809][ T1179] Call Trace: [ 657.524227][ T1179] dump_stack+0x198/0x1fd [ 657.528566][ T1179] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.533842][ T1179] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.539482][ T1179] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.545525][ T1179] watchdog+0xd7d/0x1000 [ 657.549778][ T1179] ? reset_hung_task_detector+0x30/0x30 [ 657.555322][ T1179] kthread+0x3b5/0x4a0 [ 657.559391][ T1179] ? __kthread_bind_mask+0xc0/0xc0 [ 657.564529][ T1179] ret_from_fork+0x1f/0x30 [ 657.569174][ T1179] Sending NMI from CPU 1 to CPUs 0: [ 657.576381][ C0] NMI backtrace for cpu 0 [ 657.576389][ C0] CPU: 0 PID: 6879 Comm: syz-executor557 Not tainted 5.9.0-rc6-syzkaller #0 [ 657.576396][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.576401][ C0] RIP: 0010:__lock_acquire+0x70c/0x5780 [ 657.576413][ C0] Code: 66 81 e2 ff 1f 44 0f b7 e2 be 08 00 00 00 4c 89 e0 48 c1 f8 06 48 8d 3c c5 e0 09 0c 8d e8 8c 40 5b 00 4c 0f a3 25 44 68 b0 0b <0f> 82 38 ff ff ff 48 c7 c0 60 e1 43 8d 48 c1 e8 03 42 0f b6 14 30 [ 657.576418][ C0] RSP: 0018:ffffc900055569a0 EFLAGS: 00000047 [ 657.576427][ C0] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815ba194 [ 657.576433][ C0] RDX: fffffbfff1a18140 RSI: 0000000000000008 RDI: ffffffff8d0c09f8 [ 657.576439][ C0] RBP: ffff888093922580 R08: 0000000000000000 R09: ffffffff8d0c09ff [ 657.576445][ C0] R10: fffffbfff1a1813f R11: 0000000000000000 R12: 00000000000000e8 [ 657.576450][ C0] R13: 0000000000000004 R14: dffffc0000000000 R15: ffff888093922e68 [ 657.576457][ C0] FS: 0000000000fee880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 657.576462][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.576468][ C0] CR2: 0000000020000280 CR3: 00000000a8512000 CR4: 00000000001506f0 [ 657.576474][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.576479][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.576483][ C0] Call Trace: [ 657.576487][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 657.576492][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.576495][ C0] lock_acquire+0x1f3/0xaf0 [ 657.576500][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.576504][ C0] ? lock_release+0x8f0/0x8f0 [ 657.576508][ C0] ? finish_task_switch+0x1e5/0x790 [ 657.576512][ C0] ? __switch_to+0x425/0xfe0 [ 657.576516][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576520][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576524][ C0] __mutex_lock+0x134/0x10e0 [ 657.576528][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.576533][ C0] ? tcf_idr_check_alloc+0x78/0x3b0 [ 657.576537][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.576542][ C0] ? __mutex_unlock_slowpath+0xe2/0x610 [ 657.576546][ C0] ? wait_for_completion+0x260/0x260 [ 657.576550][ C0] tcf_idr_check_alloc+0x78/0x3b0 [ 657.576554][ C0] tcf_police_init+0x347/0x13a0 [ 657.576558][ C0] ? tcf_police_cleanup+0x60/0x60 [ 657.576562][ C0] ? find_held_lock+0x2d/0x110 [ 657.576567][ C0] ? tc_lookup_action_n+0xcd/0xf0 [ 657.576571][ C0] tcf_action_init_1+0x1a3/0x990 [ 657.576575][ C0] ? tcf_action_dump_old+0x80/0x80 [ 657.576579][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576583][ C0] ? find_held_lock+0x2d/0x110 [ 657.576587][ C0] ? cache_alloc_refill+0x1e7/0x380 [ 657.576590][ C0] ? lock_downgrade+0x830/0x830 [ 657.576594][ C0] ? mark_lock+0x82/0x1660 [ 657.576598][ C0] tcf_exts_validate+0x138/0x420 [ 657.576602][ C0] ? tcf_exts_destroy+0xc0/0xc0 [ 657.576607][ C0] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.576610][ C0] ? __nla_parse+0x3d/0x4a [ 657.576614][ C0] rsvp_change+0x291/0x2990 [ 657.576618][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576622][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576625][ C0] ? find_held_lock+0x2d/0x110 [ 657.576629][ C0] ? tc_new_tfilter+0x1be4/0x2130 [ 657.576633][ C0] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.576636][ C0] ? lock_downgrade+0x830/0x830 [ 657.576640][ C0] ? blackhole_dequeue+0x10/0x10 [ 657.576642][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576645][ C0] tc_new_tfilter+0x1398/0x2130 [ 657.576647][ C0] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 657.576649][ C0] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.576652][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.576654][ C0] ? is_bpf_text_address+0xcb/0x160 [ 657.576656][ C0] ? kernel_text_address+0xbd/0xf0 [ 657.576659][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576661][ C0] ? security_capable+0x8f/0xc0 [ 657.576663][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576665][ C0] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.576667][ C0] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.576670][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 657.576672][ C0] ? lock_acquire+0x1f3/0xaf0 [ 657.576674][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 657.576676][ C0] netlink_rcv_skb+0x15a/0x430 [ 657.576679][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 657.576681][ C0] ? netlink_ack+0xa10/0xa10 [ 657.576683][ C0] netlink_unicast+0x533/0x7d0 [ 657.576685][ C0] ? netlink_attachskb+0x810/0x810 [ 657.576688][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 657.576690][ C0] ? __check_object_size+0x171/0x3e4 [ 657.576692][ C0] netlink_sendmsg+0x856/0xd90 [ 657.576694][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 657.576697][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.576699][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 657.576701][ C0] sock_sendmsg+0xcf/0x120 [ 657.576703][ C0] ____sys_sendmsg+0x331/0x810 [ 657.576706][ C0] ? kernel_sendmsg+0x50/0x50 [ 657.576708][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 657.576710][ C0] ? sock_alloc_file+0x4f/0x190 [ 657.576712][ C0] ? __lock_acquire+0x164a/0x5780 [ 657.576714][ C0] ___sys_sendmsg+0xf3/0x170 [ 657.576716][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.576719][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.576721][ C0] ? fs_reclaim_release+0x90/0xd0 [ 657.576723][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576726][ C0] ? find_held_lock+0x2d/0x110 [ 657.576728][ C0] ? __might_fault+0x11f/0x1d0 [ 657.576730][ C0] ? lock_downgrade+0x830/0x830 [ 657.576732][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576734][ C0] __sys_sendmmsg+0x195/0x480 [ 657.576736][ C0] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.576739][ C0] ? find_held_lock+0x2d/0x110 [ 657.576741][ C0] ? __fd_install+0x1b4/0x600 [ 657.576743][ C0] ? alloc_file_pseudo+0x1/0x250 [ 657.576745][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576747][ C0] ? __fd_install+0x1e6/0x600 [ 657.576749][ C0] ? __sys_socket+0x16d/0x200 [ 657.576752][ C0] ? lock_is_held_type+0xbb/0xf0 [ 657.576754][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.576756][ C0] __x64_sys_sendmmsg+0x99/0x100 [ 657.576759][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.576761][ C0] do_syscall_64+0x2d/0x70 [ 657.576763][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.576765][ C0] RIP: 0033:0x441599 [ 657.576773][ C0] 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 [ 657.576775][ C0] RSP: 002b:00007ffea7554018 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.576781][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441599 [ 657.576784][ C0] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 657.576788][ C0] RBP: 00007ffea7554020 R08: 0000000120080522 R09: 0000000120080522 [ 657.576791][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a3bb0 [ 657.576794][ C0] R13: 0000000000402470 R14: 0000000000000000 R15: 0000000000000000 [ 657.576798][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.596010][ T1179] Kernel panic - not syncing: hung_task: blocked tasks [ 658.272780][ T1179] CPU: 1 PID: 1179 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 658.281017][ T1179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.291073][ T1179] Call Trace: [ 658.294376][ T1179] dump_stack+0x198/0x1fd [ 658.298823][ T1179] panic+0x382/0x7fb [ 658.302731][ T1179] ? __warn_printk+0xf3/0xf3 [ 658.307356][ T1179] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.313005][ T1179] ? preempt_schedule_thunk+0x16/0x18 [ 658.318376][ T1179] ? watchdog.cold+0x5/0x16b [ 658.322966][ T1179] ? watchdog+0xa82/0x1000 [ 658.327388][ T1179] watchdog.cold+0x16/0x16b [ 658.331915][ T1179] ? reset_hung_task_detector+0x30/0x30 [ 658.337470][ T1179] kthread+0x3b5/0x4a0 [ 658.341538][ T1179] ? __kthread_bind_mask+0xc0/0xc0 [ 658.346657][ T1179] ret_from_fork+0x1f/0x30 [ 658.352404][ T1179] Kernel Offset: disabled [ 658.356852][ T1179] Rebooting in 86400 seconds..