Warning: Permanently added '10.128.1.24' (ECDSA) to the list of known hosts. executing program [ 610.721870][ T8472] IPVS: ftp: loaded support on port[0] = 21 [ 859.681699][ T1648] INFO: task kworker/0:2:3203 blocked for more than 143 seconds. [ 859.689633][ T1648] Not tainted 5.11.0-rc2-syzkaller #0 [ 859.697758][ T1648] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.707357][ T1648] task:kworker/0:2 state:D stack:27128 pid: 3203 ppid: 2 flags:0x00004000 [ 859.717497][ T1648] Workqueue: ipv6_addrconf addrconf_verify_work [ 859.724912][ T1648] Call Trace: [ 859.729023][ T1648] __schedule+0x90c/0x21a0 [ 859.734731][ T1648] ? io_schedule_timeout+0x140/0x140 [ 859.740067][ T1648] ? _raw_spin_unlock_irq+0x1f/0x40 [ 859.746588][ T1648] ? lockdep_hardirqs_on+0x79/0x100 [ 859.753869][ T1648] schedule+0xcf/0x270 [ 859.757963][ T1648] schedule_preempt_disabled+0xf/0x20 [ 859.764700][ T1648] __mutex_lock+0x81a/0x1110 [ 859.769317][ T1648] ? addrconf_verify_work+0xa/0x20 [ 859.776077][ T1648] ? mutex_lock_io_nested+0xf60/0xf60 [ 859.782872][ T1648] ? lock_release+0x710/0x710 [ 859.787664][ T1648] ? lock_downgrade+0x6d0/0x6d0 [ 859.793800][ T1648] addrconf_verify_work+0xa/0x20 [ 859.798768][ T1648] process_one_work+0x98d/0x15f0 [ 859.805114][ T1648] ? pwq_dec_nr_in_flight+0x320/0x320 [ 859.810519][ T1648] ? rwlock_bug.part.0+0x90/0x90 [ 859.816708][ T1648] ? _raw_spin_lock_irq+0x41/0x50 [ 859.822620][ T1648] worker_thread+0x64c/0x1120 [ 859.827333][ T1648] ? __kthread_parkme+0x13f/0x1e0 [ 859.833642][ T1648] ? process_one_work+0x15f0/0x15f0 [ 859.838878][ T1648] kthread+0x3b1/0x4a0 [ 859.844573][ T1648] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 859.850505][ T1648] ret_from_fork+0x1f/0x30 [ 859.856296][ T1648] [ 859.856296][ T1648] Showing all locks held in the system: [ 859.864940][ T1648] 1 lock held by khungtaskd/1648: [ 859.869974][ T1648] #0: ffffffff8b363820 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 859.883494][ T1648] 3 locks held by kworker/0:2/3203: [ 859.888716][ T1648] #0: ffff88814758c938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 [ 859.901002][ T1648] #1: ffffc90001d87da8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 [ 859.911784][ T1648] #2: ffffffff8c9463e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 859.921365][ T1648] 1 lock held by in:imklog/8162: [ 859.927006][ T1648] #0: ffff8880111819f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 859.936792][ T1648] 2 locks held by syz-executor846/8494: [ 859.942817][ T1648] [ 859.945164][ T1648] ============================================= [ 859.945164][ T1648] [ 859.954094][ T1648] NMI backtrace for cpu 0 [ 859.958437][ T1648] CPU: 0 PID: 1648 Comm: khungtaskd Not tainted 5.11.0-rc2-syzkaller #0 [ 859.966769][ T1648] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.976832][ T1648] Call Trace: [ 859.980115][ T1648] dump_stack+0x107/0x163 [ 859.984492][ T1648] nmi_cpu_backtrace.cold+0x44/0xd7 [ 859.989708][ T1648] ? lapic_can_unplug_cpu+0x80/0x80 [ 859.994969][ T1648] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 860.001008][ T1648] watchdog+0xd43/0xfa0 [ 860.005330][ T1648] ? reset_hung_task_detector+0x30/0x30 [ 860.010893][ T1648] kthread+0x3b1/0x4a0 [ 860.014969][ T1648] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 860.020875][ T1648] ret_from_fork+0x1f/0x30 [ 860.025532][ T1648] Sending NMI from CPU 0 to CPUs 1: [ 860.032230][ C1] NMI backtrace for cpu 1 [ 860.032240][ C1] CPU: 1 PID: 8494 Comm: syz-executor846 Not tainted 5.11.0-rc2-syzkaller #0 [ 860.032250][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 860.032260][ C1] RIP: 0010:mutex_lock_nested+0x0/0x20 [ 860.032271][ C1] Code: 24 40 e8 03 6c c7 f8 e9 ee f4 ff ff e8 79 6c c7 f8 e9 aa f4 ff ff e8 6f 6c c7 f8 e9 63 fd ff ff e8 65 6c c7 f8 e9 26 fd ff ff <4c> 8b 04 24 89 f2 31 c9 be 02 00 00 00 e9 de ee ff ff 0f 1f 40 00 [ 860.032288][ C1] RSP: 0018:ffffc90000cc6cd8 EFLAGS: 00000246 [ 860.032300][ C1] RAX: 0000000000000000 RBX: fffffffffffffff0 RCX: 0000000000000000 [ 860.032309][ C1] RDX: ffff888021771bc0 RSI: 0000000000000000 RDI: ffff888012389800 [ 860.032318][ C1] RBP: ffffc90000cc6d90 R08: 0000000000000001 R09: ffff888012389807 [ 860.032327][ C1] R10: ffffed1002471300 R11: 0000000000000000 R12: ffffc90000cc6f18 [ 860.032336][ C1] R13: 0000000000000001 R14: ffff888012389800 R15: ffff888012389890 [ 860.032345][ C1] FS: 0000000000911880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 860.032354][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 860.032362][ C1] CR2: 00007f4963db8000 CR3: 0000000010cf0000 CR4: 00000000001506e0 [ 860.032371][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 860.032380][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 860.032387][ C1] Call Trace: [ 860.032391][ C1] tcf_idr_check_alloc+0x78/0x3b0 [ 860.032396][ C1] tcf_police_init+0x347/0x13a0 [ 860.032402][ C1] ? tcf_police_cleanup+0x60/0x60 [ 860.032407][ C1] ? find_held_lock+0x2d/0x110 [ 860.032413][ C1] ? tc_lookup_action_n+0xcd/0xf0 [ 860.032419][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 860.032425][ C1] ? __kernel_text_address+0x9/0x30 [ 860.032431][ C1] tcf_action_init_1+0x1a3/0x990 [ 860.032437][ C1] ? tcf_action_dump_old+0x80/0x80 [ 860.032442][ C1] ? find_held_lock+0x2d/0x110 [ 860.032447][ C1] ? pcpu_alloc+0x1239/0x16f0 [ 860.032453][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 860.032458][ C1] tcf_exts_validate+0x138/0x420 [ 860.032463][ C1] ? tcf_exts_destroy+0xc0/0xc0 [ 860.032469][ C1] ? __mutex_unlock_slowpath+0xe2/0x610 [ 860.032475][ C1] ? wait_for_completion_io+0x260/0x260 [ 860.032481][ C1] u32_set_parms+0xb9/0xc60 [ 860.032486][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 860.032493][ C1] ? u32_bind_class+0x2c0/0x2c0 [ 860.032498][ C1] u32_change+0x1f13/0x3000 [ 860.032503][ C1] ? u32_dump+0x1030/0x1030 [ 860.032508][ C1] ? blackhole_dequeue+0x10/0x10 [ 860.032514][ C1] ? u32_lookup_ht+0x1d0/0x1d0 [ 860.032520][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 860.032526][ C1] ? tc_new_tfilter+0x132a/0x2120 [ 860.032532][ C1] tc_new_tfilter+0x1394/0x2120 [ 860.032537][ C1] ? u32_dump+0x1030/0x1030 [ 860.032543][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 860.032548][ C1] ? tc_del_tfilter+0x15b0/0x15b0 [ 860.032554][ C1] rtnetlink_rcv_msg+0x80e/0xad0 [ 860.032559][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 860.032565][ C1] netlink_rcv_skb+0x153/0x420 [ 860.032571][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 860.032577][ C1] ? netlink_ack+0xaa0/0xaa0 [ 860.032582][ C1] ? netlink_deliver_tap+0x227/0xb70 [ 860.032588][ C1] netlink_unicast+0x533/0x7d0 [ 860.032593][ C1] ? netlink_attachskb+0x870/0x870 [ 860.032599][ C1] ? _copy_from_iter_full+0x275/0x850 [ 860.032605][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 860.032612][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 860.032618][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 860.032624][ C1] ? __check_object_size+0x171/0x3f0 [ 860.032630][ C1] netlink_sendmsg+0x856/0xd90 [ 860.032635][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 860.032641][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 860.032647][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 860.032653][ C1] sock_sendmsg+0xcf/0x120 [ 860.032658][ C1] ____sys_sendmsg+0x331/0x810 [ 860.032663][ C1] ? kernel_sendmsg+0x50/0x50 [ 860.032668][ C1] ? do_recvmmsg+0x6c0/0x6c0 [ 860.032674][ C1] ? __lock_acquire+0x16b7/0x5500 [ 860.032679][ C1] ___sys_sendmsg+0xf3/0x170 [ 860.032684][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 860.032690][ C1] ? find_held_lock+0x2d/0x110 [ 860.032695][ C1] ? __might_fault+0xd3/0x180 [ 860.032701][ C1] ? lock_downgrade+0x6d0/0x6d0 [ 860.032706][ C1] __sys_sendmmsg+0x195/0x470 [ 860.032711][ C1] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 860.032717][ C1] ? find_held_lock+0x2d/0x110 [ 860.032722][ C1] ? alloc_file_pseudo+0x1/0x250 [ 860.032728][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 860.032734][ C1] ? fd_install+0x215/0x640 [ 860.032739][ C1] ? __sys_socket+0x16d/0x200 [ 860.032745][ C1] __x64_sys_sendmmsg+0x99/0x100 [ 860.032750][ C1] ? syscall_enter_from_user_mode+0x1d/0x50 [ 860.032755][ C1] do_syscall_64+0x2d/0x70 [ 860.032760][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 860.032765][ C1] RIP: 0033:0x441769 [ 860.032773][ 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 [ 860.032788][ C1] RSP: 002b:00007ffd7f35e568 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 860.032800][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441769 [ 860.032807][ C1] RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000004 [ 860.032815][ C1] RBP: 00007ffd7f35e570 R08: 0000000120080522 R09: 0000000120080522 [ 860.032822][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a2ab0 [ 860.032830][ C1] R13: 0000000000402640 R14: 0000000000000000 R15: 0000000000000000 [ 860.032838][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.441 msecs [ 860.037594][ T1648] Kernel panic - not syncing: hung_task: blocked tasks [ 860.597301][ T1648] CPU: 0 PID: 1648 Comm: khungtaskd Not tainted 5.11.0-rc2-syzkaller #0 [ 860.605638][ T1648] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 860.615804][ T1648] Call Trace: [ 860.619091][ T1648] dump_stack+0x107/0x163 [ 860.623442][ T1648] panic+0x306/0x73d [ 860.627392][ T1648] ? __warn_printk+0xf3/0xf3 [ 860.632001][ T1648] ? lapic_can_unplug_cpu+0x80/0x80 [ 860.637207][ T1648] ? preempt_schedule_thunk+0x16/0x18 [ 860.642591][ T1648] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 860.648768][ T1648] ? watchdog.cold+0x5/0x158 [ 860.653415][ T1648] watchdog.cold+0x16/0x158 [ 860.657937][ T1648] ? reset_hung_task_detector+0x30/0x30 [ 860.663511][ T1648] kthread+0x3b1/0x4a0 [ 860.667588][ T1648] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 860.673492][ T1648] ret_from_fork+0x1f/0x30 [ 860.678733][ T1648] Kernel Offset: disabled [ 860.683061][ T1648] Rebooting in 86400 seconds..