Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. executing program [ 502.546146][ T6911] IPVS: ftp: loaded support on port[0] = 21 [ 657.291880][ T1176] INFO: task kworker/0:1:6903 blocked for more than 143 seconds. [ 657.299782][ T1176] Not tainted 5.9.0-rc6-syzkaller #0 [ 657.308721][ T1176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 657.318395][ T1176] task:kworker/0:1 state:D stack:29440 pid: 6903 ppid: 2 flags:0x00004000 [ 657.328723][ T1176] Workqueue: ipv6_addrconf addrconf_verify_work [ 657.335979][ T1176] Call Trace: [ 657.339326][ T1176] __schedule+0xec9/0x2280 [ 657.345095][ T1176] ? io_schedule_timeout+0x140/0x140 [ 657.350535][ T1176] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 657.357878][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.363956][ T1176] ? lockdep_hardirqs_on+0x53/0x100 [ 657.370381][ T1176] schedule+0xd0/0x2a0 [ 657.375778][ T1176] schedule_preempt_disabled+0xf/0x20 [ 657.381168][ T1176] __mutex_lock+0x3e2/0x10e0 [ 657.386974][ T1176] ? addrconf_verify_work+0xa/0x20 [ 657.392935][ T1176] ? mutex_lock_io_nested+0xf60/0xf60 [ 657.398321][ T1176] ? lock_release+0x8f0/0x8f0 [ 657.404153][ T1176] ? lock_downgrade+0x830/0x830 [ 657.409018][ T1176] ? _raw_spin_unlock_irq+0x1f/0x80 [ 657.415429][ T1176] ? lock_is_held_type+0xbb/0xf0 [ 657.420492][ T1176] addrconf_verify_work+0xa/0x20 [ 657.426789][ T1176] process_one_work+0x94c/0x1670 [ 657.433821][ T1176] ? lock_release+0x8f0/0x8f0 [ 657.438506][ T1176] ? pwq_dec_nr_in_flight+0x320/0x320 [ 657.445095][ T1176] ? rwlock_bug.part.0+0x90/0x90 [ 657.450055][ T1176] ? lockdep_hardirqs_off+0x96/0xd0 [ 657.456523][ T1176] worker_thread+0x64c/0x1120 [ 657.461285][ T1176] ? __kthread_parkme+0x13f/0x1e0 [ 657.467509][ T1176] ? process_one_work+0x1670/0x1670 [ 657.473520][ T1176] kthread+0x3b5/0x4a0 [ 657.477594][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 657.483999][ T1176] ret_from_fork+0x1f/0x30 [ 657.488512][ T1176] [ 657.488512][ T1176] Showing all locks held in the system: [ 657.497518][ T1176] 1 lock held by khungtaskd/1176: [ 657.505119][ T1176] #0: ffffffff8a067f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 657.517609][ T1176] 1 lock held by in:imklog/6599: [ 657.523302][ T1176] #0: ffff8880a8579670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 657.533872][ T1176] 3 locks held by kworker/0:1/6903: [ 657.539088][ T1176] #0: ffff888214e19d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 657.551391][ T1176] #1: ffffc90005a97da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 657.563747][ T1176] #2: ffffffff8b14d548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 657.574179][ T1176] 2 locks held by syz-executor761/6933: [ 657.579754][ T1176] [ 657.583266][ T1176] ============================================= [ 657.583266][ T1176] [ 657.592483][ T1176] NMI backtrace for cpu 0 [ 657.596822][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 657.605046][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.615090][ T1176] Call Trace: [ 657.618525][ T1176] dump_stack+0x198/0x1fd [ 657.622857][ T1176] nmi_cpu_backtrace.cold+0x70/0xb1 [ 657.628151][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 657.633789][ T1176] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 657.639811][ T1176] watchdog+0xd7d/0x1000 [ 657.644055][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 657.649598][ T1176] kthread+0x3b5/0x4a0 [ 657.653670][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 657.658793][ T1176] ret_from_fork+0x1f/0x30 [ 657.663437][ T1176] Sending NMI from CPU 0 to CPUs 1: [ 657.670315][ C1] NMI backtrace for cpu 1 [ 657.670322][ C1] CPU: 1 PID: 6933 Comm: syz-executor761 Not tainted 5.9.0-rc6-syzkaller #0 [ 657.670329][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 657.670333][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x55/0x60 [ 657.670345][ C1] Code: 82 08 14 00 00 83 f8 02 75 20 48 8b 8a 10 14 00 00 8b 92 0c 14 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 66 2e 0f 1f 84 00 00 00 00 00 41 55 41 54 49 89 fc 55 48 bd eb [ 657.670349][ C1] RSP: 0018:ffffc90001526cd0 EFLAGS: 00000293 [ 657.670357][ C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 000000000000001e [ 657.670362][ C1] RDX: ffff8880a69b2240 RSI: ffffffff83d8430f RDI: ffff8880a9ca2b40 [ 657.670367][ C1] RBP: 00000000f0000000 R08: 0000000000000000 R09: ffff888099df2807 [ 657.670373][ C1] R10: 0000000000000002 R11: 0000000000000000 R12: ffff8880a9ca2842 [ 657.670378][ C1] R13: ffff8880a9ca2b40 R14: 000000000000001e R15: ffff8880a9ca2b00 [ 657.670384][ C1] FS: 0000000000d5a880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 657.670388][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 657.670394][ C1] CR2: 00007fa0bdbcf6c0 CR3: 00000000a2a42000 CR4: 00000000001506e0 [ 657.670399][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 657.670404][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 657.670407][ C1] Call Trace: [ 657.670410][ C1] __radix_tree_lookup+0x16f/0x290 [ 657.670414][ C1] tcf_idr_check_alloc+0xb0/0x3b0 [ 657.670417][ C1] tcf_police_init+0x347/0x13a0 [ 657.670421][ C1] ? tcf_police_cleanup+0x60/0x60 [ 657.670424][ C1] ? find_held_lock+0x2d/0x110 [ 657.670427][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 657.670431][ C1] ? mark_held_locks+0x9f/0xe0 [ 657.670435][ C1] ? check_preemption_disabled+0x50/0x130 [ 657.670438][ C1] tcf_action_init_1+0x1a3/0x990 [ 657.670442][ C1] ? tcf_action_dump_old+0x80/0x80 [ 657.670445][ C1] ? kasan_save_stack+0x32/0x40 [ 657.670448][ C1] ? kasan_save_stack+0x1b/0x40 [ 657.670452][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 657.670456][ C1] ? kmem_cache_alloc_trace+0x174/0x300 [ 657.670459][ C1] ? fw_change+0x4b5/0x13e0 [ 657.670463][ C1] ? tc_new_tfilter+0x1398/0x2130 [ 657.670467][ C1] ? rtnetlink_rcv_msg+0x80f/0xad0 [ 657.670470][ C1] ? netlink_rcv_skb+0x15a/0x430 [ 657.670474][ C1] ? netlink_unicast+0x533/0x7d0 [ 657.670477][ C1] ? netlink_sendmsg+0x856/0xd90 [ 657.670480][ C1] ? sock_sendmsg+0xcf/0x120 [ 657.670484][ C1] ? ____sys_sendmsg+0x331/0x810 [ 657.670487][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 657.670491][ C1] ? __sys_sendmmsg+0x195/0x480 [ 657.670494][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 657.670498][ C1] ? do_syscall_64+0x2d/0x70 [ 657.670502][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.670505][ C1] tcf_exts_validate+0x138/0x420 [ 657.670509][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 657.670512][ C1] ? mark_lock+0x82/0x1660 [ 657.670515][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670518][ C1] fw_set_parms+0x13d/0xa30 [ 657.670522][ C1] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 657.670526][ C1] ? fw_delete+0x8c0/0x8c0 [ 657.670530][ C1] ? kmem_cache_alloc_trace+0x18e/0x300 [ 657.670533][ C1] ? __nla_parse+0x3d/0x4a [ 657.670536][ C1] fw_change+0x57e/0x13e0 [ 657.670540][ C1] ? lock_downgrade+0x830/0x830 [ 657.670543][ C1] ? fw_set_parms+0xa30/0xa30 [ 657.670546][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670550][ C1] tc_new_tfilter+0x1398/0x2130 [ 657.670553][ C1] ? fw_set_parms+0xa30/0xa30 [ 657.670556][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.670561][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.670565][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.670568][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670572][ C1] ? security_capable+0x8f/0xc0 [ 657.670575][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670579][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 657.670582][ C1] rtnetlink_rcv_msg+0x80f/0xad0 [ 657.670586][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.670589][ C1] ? lock_acquire+0x1f3/0xaf0 [ 657.670593][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 657.670596][ C1] netlink_rcv_skb+0x15a/0x430 [ 657.670600][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 657.670603][ C1] ? netlink_ack+0xa10/0xa10 [ 657.670607][ C1] ? __kmalloc_node_track_caller+0x38/0x60 [ 657.670611][ C1] netlink_unicast+0x533/0x7d0 [ 657.670614][ C1] ? netlink_attachskb+0x810/0x810 [ 657.670618][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 657.670622][ C1] ? __check_object_size+0x171/0x3e4 [ 657.670625][ C1] netlink_sendmsg+0x856/0xd90 [ 657.670629][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.670632][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 657.670636][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 657.670639][ C1] sock_sendmsg+0xcf/0x120 [ 657.670643][ C1] ____sys_sendmsg+0x331/0x810 [ 657.670646][ C1] ? kernel_sendmsg+0x50/0x50 [ 657.670649][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 657.670652][ C1] ? __lock_acquire+0x164a/0x5780 [ 657.670655][ C1] ___sys_sendmsg+0xf3/0x170 [ 657.670658][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 657.670662][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 657.670665][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670668][ C1] ? find_held_lock+0x2d/0x110 [ 657.670670][ C1] ? __might_fault+0x11f/0x1d0 [ 657.670673][ C1] ? lock_downgrade+0x830/0x830 [ 657.670676][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670679][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670682][ C1] __sys_sendmmsg+0x195/0x480 [ 657.670685][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 657.670688][ C1] ? __might_fault+0x190/0x1d0 [ 657.670691][ C1] ? _copy_to_user+0x126/0x160 [ 657.670694][ C1] ? sockfd_lookup_light+0xc6/0x180 [ 657.670697][ C1] ? __sys_sendmsg+0x10c/0x1b0 [ 657.670700][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 657.670703][ C1] ? lock_is_held_type+0xbb/0xf0 [ 657.670707][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.670709][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 657.670713][ C1] ? syscall_enter_from_user_mode+0x1d/0x60 [ 657.670716][ C1] do_syscall_64+0x2d/0x70 [ 657.670719][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 657.670722][ C1] RIP: 0033:0x441579 [ 657.670733][ 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 [ 657.670737][ C1] RSP: 002b:00007ffcd3829748 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 657.670744][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441579 [ 657.670749][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 [ 657.670753][ C1] RBP: 00007ffcd3829750 R08: 0000000120080522 R09: 0000000120080522 [ 657.670758][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2930 [ 657.670762][ C1] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 657.670767][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 657.681766][ T1176] Kernel panic - not syncing: hung_task: blocked tasks [ 658.353961][ T1176] CPU: 0 PID: 1176 Comm: khungtaskd Not tainted 5.9.0-rc6-syzkaller #0 [ 658.362184][ T1176] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 658.372229][ T1176] Call Trace: [ 658.375521][ T1176] dump_stack+0x198/0x1fd [ 658.379947][ T1176] panic+0x382/0x7fb [ 658.383841][ T1176] ? __warn_printk+0xf3/0xf3 [ 658.388429][ T1176] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 658.394055][ T1176] ? preempt_schedule_thunk+0x16/0x18 [ 658.399423][ T1176] ? watchdog.cold+0x5/0x16b [ 658.404008][ T1176] ? watchdog+0xa82/0x1000 [ 658.408425][ T1176] watchdog.cold+0x16/0x16b [ 658.412927][ T1176] ? reset_hung_task_detector+0x30/0x30 [ 658.418468][ T1176] kthread+0x3b5/0x4a0 [ 658.422530][ T1176] ? __kthread_bind_mask+0xc0/0xc0 [ 658.427643][ T1176] ret_from_fork+0x1f/0x30 [ 658.433587][ T1176] Kernel Offset: disabled [ 658.438058][ T1176] Rebooting in 86400 seconds..