Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. executing program [ 502.762867][ T8476] IPVS: ftp: loaded support on port[0] = 21 [ 780.767294][ T1631] INFO: task kworker/0:1:8468 blocked for more than 143 seconds. [ 780.775252][ T1631] Not tainted 5.10.0-rc1-syzkaller #0 [ 780.784043][ T1631] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 780.793321][ T1631] task:kworker/0:1 state:D stack:29224 pid: 8468 ppid: 2 flags:0x00004000 [ 780.803230][ T1631] Workqueue: ipv6_addrconf addrconf_verify_work [ 780.810199][ T1631] Call Trace: [ 780.813562][ T1631] __schedule+0x893/0x2130 [ 780.818877][ T1631] ? io_schedule_timeout+0x140/0x140 [ 780.824170][ T1631] ? _raw_spin_unlock_irq+0x1f/0x40 [ 780.830383][ T1631] ? lockdep_hardirqs_on+0x85/0x110 [ 780.835591][ T1631] schedule+0xcf/0x270 [ 780.840649][ T1631] schedule_preempt_disabled+0xf/0x20 [ 780.846024][ T1631] __mutex_lock+0x3e2/0x10e0 [ 780.851514][ T1631] ? addrconf_verify_work+0xa/0x20 [ 780.856634][ T1631] ? mutex_lock_io_nested+0xf60/0xf60 [ 780.863633][ T1631] ? lock_release+0x710/0x710 [ 780.868951][ T1631] ? lock_downgrade+0x6d0/0x6d0 [ 780.873818][ T1631] addrconf_verify_work+0xa/0x20 [ 780.879953][ T1631] process_one_work+0x933/0x15a0 [ 780.884917][ T1631] ? lock_release+0x710/0x710 [ 780.890655][ T1631] ? pwq_dec_nr_in_flight+0x320/0x320 [ 780.896033][ T1631] ? rwlock_bug.part.0+0x90/0x90 [ 780.901926][ T1631] ? _raw_spin_lock_irq+0x41/0x50 [ 780.906963][ T1631] worker_thread+0x64c/0x1120 [ 780.913733][ T1631] ? __kthread_parkme+0x13f/0x1e0 [ 780.919342][ T1631] ? process_one_work+0x15a0/0x15a0 [ 780.924553][ T1631] kthread+0x3af/0x4a0 [ 780.929717][ T1631] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 780.935681][ T1631] ret_from_fork+0x1f/0x30 [ 780.941141][ T1631] [ 780.941141][ T1631] Showing all locks held in the system: [ 780.949601][ T1631] 1 lock held by khungtaskd/1631: [ 780.954625][ T1631] #0: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 780.966386][ T1631] 1 lock held by in:imklog/8185: [ 780.971964][ T1631] #0: ffff88801ac4a5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 780.981725][ T1631] 3 locks held by kworker/0:1/8468: [ 780.986932][ T1631] #0: ffff8881470cc138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 [ 780.998850][ T1631] #1: ffffc900016afda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 [ 781.009737][ T1631] #2: ffffffff8c926d08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 781.019820][ T1631] 1 lock held by syz-executor384/8498: [ 781.025295][ T1631] [ 781.028575][ T1631] ============================================= [ 781.028575][ T1631] [ 781.037004][ T1631] NMI backtrace for cpu 0 [ 781.041454][ T1631] CPU: 0 PID: 1631 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0 [ 781.049788][ T1631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.059841][ T1631] Call Trace: [ 781.063167][ T1631] dump_stack+0x107/0x163 [ 781.067495][ T1631] nmi_cpu_backtrace.cold+0x44/0xd7 [ 781.072771][ T1631] ? lapic_can_unplug_cpu+0x80/0x80 [ 781.078080][ T1631] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 781.084091][ T1631] watchdog+0xd43/0xfa0 [ 781.088265][ T1631] ? reset_hung_task_detector+0x30/0x30 [ 781.093826][ T1631] kthread+0x3af/0x4a0 [ 781.097892][ T1631] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 781.103778][ T1631] ret_from_fork+0x1f/0x30 [ 781.108326][ T1631] Sending NMI from CPU 0 to CPUs 1: [ 781.114748][ C1] NMI backtrace for cpu 1 [ 781.114755][ C1] CPU: 1 PID: 8498 Comm: syz-executor384 Not tainted 5.10.0-rc1-syzkaller #0 [ 781.114761][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.114766][ C1] RIP: 0010:check_memory_region+0x12b/0x180 [ 781.114777][ C1] Code: 3a 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a <5b> b8 01 00 00 00 5d 41 5c c3 44 89 c2 e8 23 f7 ff ff 5b 83 f0 01 [ 781.114782][ C1] RSP: 0018:ffffc9000152ead0 EFLAGS: 00000246 [ 781.114791][ C1] RAX: fffffbfff19d93a2 RBX: fffffbfff19d93a2 RCX: ffffffff81562708 [ 781.114796][ C1] RDX: fffffbfff19d93a2 RSI: 0000000000000008 RDI: ffffffff8cec9d08 [ 781.114801][ C1] RBP: fffffbfff19d93a1 R08: 0000000000000000 R09: ffffffff8cec9d0f [ 781.114806][ C1] R10: fffffbfff19d93a1 R11: 0000000000000000 R12: 0000000000000000 [ 781.114812][ C1] R13: ffff888014862468 R14: 0000000000000000 R15: 0000000000000000 [ 781.114817][ C1] FS: 00000000021ea880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 781.114822][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 781.114827][ C1] CR2: 00000000006cd080 CR3: 0000000024b09000 CR4: 00000000001506e0 [ 781.114832][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 781.114838][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 781.114841][ C1] Call Trace: [ 781.114844][ C1] lock_acquire+0xb8/0x8b0 [ 781.114848][ C1] ? lock_release+0x710/0x710 [ 781.114852][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 781.114856][ C1] __mutex_lock+0x134/0x10e0 [ 781.114859][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 781.114863][ C1] ? tcf_idr_check_alloc+0x78/0x3b0 [ 781.114867][ C1] ? mutex_lock_io_nested+0xf60/0xf60 [ 781.114871][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 781.114875][ C1] ? wait_for_completion+0x260/0x260 [ 781.114878][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 781.114882][ C1] tcf_police_init+0x347/0x13a0 [ 781.114885][ C1] ? tcf_police_cleanup+0x60/0x60 [ 781.114889][ C1] ? find_held_lock+0x2d/0x110 [ 781.114893][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 781.114897][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 781.114900][ C1] tcf_action_init_1+0x1a3/0x990 [ 781.114904][ C1] ? tcf_action_dump_old+0x80/0x80 [ 781.114908][ C1] ? ___sys_sendmsg+0xf3/0x170 [ 781.114911][ C1] ? __sys_sendmmsg+0x195/0x470 [ 781.114915][ C1] ? __x64_sys_sendmmsg+0x99/0x100 [ 781.114918][ C1] ? do_syscall_64+0x2d/0x70 [ 781.114923][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 781.114926][ C1] ? find_held_lock+0x2d/0x110 [ 781.114930][ C1] tcf_exts_validate+0x138/0x420 [ 781.114933][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 781.114937][ C1] ? kasan_unpoison_shadow+0x33/0x40 [ 781.114941][ C1] rsvp_change+0x291/0x27a0 [ 781.114944][ C1] ? find_held_lock+0x2d/0x110 [ 781.114948][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 781.114952][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 781.114955][ C1] ? blackhole_dequeue+0x10/0x10 [ 781.114959][ C1] tc_new_tfilter+0x1398/0x2130 [ 781.114963][ C1] ? tcf_bind_filter.isra.0+0x3c0/0x3c0 [ 781.114967][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 781.114970][ C1] ? lock_chain_count+0x20/0x20 [ 781.114974][ C1] ? kernel_text_address+0xbd/0xf0 [ 781.114978][ C1] ? tc_del_tfilter+0x15c0/0x15c0 [ 781.114982][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 781.114986][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 781.114990][ C1] netlink_rcv_skb+0x153/0x420 [ 781.114993][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 781.114997][ C1] ? netlink_ack+0xaa0/0xaa0 [ 781.115001][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 781.115004][ C1] netlink_unicast+0x533/0x7d0 [ 781.115008][ C1] ? netlink_attachskb+0x810/0x810 [ 781.115012][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 781.115016][ C1] ? __check_object_size+0x171/0x3f0 [ 781.115038][ C1] netlink_sendmsg+0x856/0xd90 [ 781.115042][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 781.115046][ C1] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 781.115050][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 781.115053][ C1] sock_sendmsg+0xcf/0x120 [ 781.115057][ C1] ____sys_sendmsg+0x331/0x810 [ 781.115075][ C1] ? kernel_sendmsg+0x50/0x50 [ 781.115079][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 781.115082][ C1] ? __lock_acquire+0x16a0/0x5590 [ 781.115086][ C1] ___sys_sendmsg+0xf3/0x170 [ 781.115094][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 781.115098][ C1] ? find_held_lock+0x2d/0x110 [ 781.115101][ C1] ? __might_fault+0xd3/0x180 [ 781.115123][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 781.115127][ C1] __sys_sendmmsg+0x195/0x470 [ 781.115130][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 781.115140][ C1] ? find_held_lock+0x2d/0x110 [ 781.115143][ C1] ? alloc_file_pseudo+0x1/0x250 [ 781.115147][ C1] ? __fd_install+0x1e6/0x600 [ 781.115151][ C1] ? __sys_socket+0x16d/0x200 [ 781.115154][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 781.115159][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 781.115162][ C1] do_syscall_64+0x2d/0x70 [ 781.115167][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 781.115170][ C1] RIP: 0033:0x441789 [ 781.115182][ 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 [ 781.115187][ C1] RSP: 002b:00007fff277f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 781.115196][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441789 [ 781.115202][ C1] RDX: 04924924924926d3 RSI: 0000000020000200 RDI: 0000000000000004 [ 781.115207][ C1] RBP: 00007fff277f4da0 R08: 0000000120080522 R09: 0000000120080522 [ 781.115213][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2ad0 [ 781.115218][ C1] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 781.115225][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.165 msecs [ 781.154424][ T1631] Kernel panic - not syncing: hung_task: blocked tasks [ 781.693462][ T1631] CPU: 0 PID: 1631 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0 [ 781.701776][ T1631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 781.711821][ T1631] Call Trace: [ 781.715112][ T1631] dump_stack+0x107/0x163 [ 781.719477][ T1631] panic+0x306/0x73d [ 781.723367][ T1631] ? __warn_printk+0xf3/0xf3 [ 781.727956][ T1631] ? lapic_can_unplug_cpu+0x80/0x80 [ 781.733254][ T1631] ? preempt_schedule_thunk+0x16/0x18 [ 781.738729][ T1631] ? watchdog.cold+0x5/0x158 [ 781.743309][ T1631] ? watchdog+0xa80/0xfa0 [ 781.747633][ T1631] watchdog.cold+0x16/0x158 [ 781.752134][ T1631] ? reset_hung_task_detector+0x30/0x30 [ 781.757676][ T1631] kthread+0x3af/0x4a0 [ 781.761741][ T1631] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 781.767630][ T1631] ret_from_fork+0x1f/0x30 [ 781.772791][ T1631] Kernel Offset: disabled [ 781.777115][ T1631] Rebooting in 86400 seconds..