IPVS: Error connecting to the multicast addr IPVS: sync thread started: state = BACKUP, mcast_ifn = team_slave_1, syncid = 0, id = 0 kobject: 'loop4' (000000008ff0abd3): kobject_uevent_env kobject: 'loop4' (000000008ff0abd3): fill_kobj_path: path = '/devices/virtual/block/loop4' rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10501 ticks this GP) idle=d2e/1/0x4000000000000004 softirq=135313/135313 fqs=0 rcu: (t=10501 jiffies g=181493 q=538) rcu: rcu_preempt kthread starved for 10501 jiffies! g181493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt I25560 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 kernel/sched/core.c:3472 schedule+0x105/0x420 kernel/sched/core.c:3516 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1803 rcu_gp_fqs_loop+0x6ba/0x970 kernel/rcu/tree.c:1948 rcu_gp_kthread+0x2bb/0xc10 kernel/rcu/tree.c:2105 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 835 Comm: ipvs-b:5:0 Not tainted 4.20.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211 print_cpu_stall.cold+0x227/0x40c kernel/rcu/tree.c:1348 check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xb32/0x1380 kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:xfrm_policy_match+0x12e/0x2d0 net/xfrm/xfrm_policy.c:1890 Code: c4 00 00 00 45 8b 75 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 69 01 00 00 48 8d bb c0 00 00 00 44 23 b3 c4 00 00 00 RSP: 0018:ffff8880ae707138 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8880639da900 RCX: ffffffff86c20a1b RDX: 0000000000000000 RSI: ffffffff86c20a2c RDI: ffff8880639da9c4 RBP: ffff8880ae707170 R08: ffff88808f97a480 R09: 0000000000000000 R10: ffff88808f97a480 R11: 0000000000000000 R12: 0000000000000002 R13: ffff8880ae707678 R14: 0000000000000000 R15: 0000000000000000 __xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2022 [inline] xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] xfrm_policy_lookup_bytype+0x95f/0xdb0 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x8cf/0x2a90 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xad/0xc0 net/ipv4/route.c:2582 ip_route_output_ports include/net/route.h:161 [inline] igmpv3_newpack+0x54c/0x14a0 net/ipv4/igmp.c:362 add_grhead.isra.0+0x235/0x300 net/ipv4/igmp.c:433 add_grec+0x1086/0x1370 net/ipv4/igmp.c:566 igmpv3_send_cr net/ipv4/igmp.c:696 [inline] igmp_ifc_timer_expire+0x5c2/0xbd0 net/ipv4/igmp.c:793 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:console_unlock+0xd46/0x11e0 kernel/printk/printk.c:2416 Code: 48 c1 e8 03 80 3c 08 00 0f 85 d2 03 00 00 48 83 3d ce ec 2a 08 00 0f 84 b9 02 00 00 e8 f3 db 19 00 48 8b bd 10 ff ff ff 57 9d <0f> 1f 44 00 00 e9 5c ff ff ff e8 db db 19 00 48 8b 7d 08 c7 05 cd RSP: 0018:ffff88805ffffa60 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f97a480 RBX: 0000000000000200 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff816762ad RDI: 0000000000000293 RBP: ffff88805ffffb80 R08: 0000000000000006 R09: ffff88808f97ad20 R10: ffff88808f97a480 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff849d78b0 R14: ffffffff89f6d470 R15: 0000000000028c01 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 sync_thread_backup+0x13e/0x670 net/netfilter/ipvs/ip_vs_sync.c:1720 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task kworker/u4:7:7775 blocked for more than 140 seconds. Not tainted 4.20.0+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:7 D18360 7775 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 kernel/sched/core.c:3472 schedule+0x105/0x420 kernel/sched/core.c:3516 schedule_timeout+0x1d3/0x250 kernel/time/timer.c:1779 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x457/0x810 kernel/sched/completion.c:136 __wait_rcu_gp+0x22a/0x2f0 kernel/rcu/update.c:360 synchronize_rcu.part.0+0xf4/0x110 kernel/rcu/tree_plugin.h:872 synchronize_rcu+0x27/0xa0 kernel/rcu/tree_plugin.h:873 synchronize_net+0x4d/0x60 net/core/dev.c:9164 xfrm_user_net_exit+0x10b/0x200 net/xfrm/xfrm_user.c:3335 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task syz-executor0:31639 blocked for more than 140 seconds. Not tainted 4.20.0+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D20440 31639 31638 0x00000002 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 kernel/sched/core.c:3472 schedule+0x105/0x420 kernel/sched/core.c:3516 io_schedule+0x1c/0x70 kernel/sched/core.c:5137 bit_wait_io+0x17/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48 out_of_line_wait_on_bit+0x1f4/0x3b0 kernel/sched/wait_bit.c:63 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer+0x6f/0x90 fs/buffer.c:118 wait_on_buffer include/linux/buffer_head.h:354 [inline] ext4_find_entry+0xdcc/0x12e0 fs/ext4/namei.c:1436 ext4_rmdir+0x1da/0xd80 fs/ext4/namei.c:2930 vfs_rmdir fs/namei.c:3879 [inline] vfs_rmdir+0x19c/0x470 fs/namei.c:3858 do_rmdir+0x474/0x580 fs/namei.c:3940 __do_sys_rmdir fs/namei.c:3958 [inline] __se_sys_rmdir fs/namei.c:3956 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3956 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457c37 Code: 1f 48 83 fa 40 7d 1b 84 c9 74 0b 0f b6 98 c0 00 00 00 84 db 75 0c 48 8b 1d 6e 42 1a 01 48 85 db 75 87 48 8b 6c 24 38 48 83 c4 <40> c3 e8 72 22 00 00 e9 2d ff ff ff cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007fff36496888 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000457c37 RDX: 0000000000000000 RSI: 0000000000710698 RDI: 00007fff364979c0 RBP: 0000000000000f34 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000207 R12: 00007fff364979c0 R13: 0000000000ffa940 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor5:804 blocked for more than 140 seconds. Not tainted 4.20.0+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D24904 804 7338 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 kernel/sched/core.c:3472 schedule+0x105/0x420 kernel/sched/core.c:3516 io_schedule+0x1c/0x70 kernel/sched/core.c:5137 wait_on_page_bit_common+0x6b8/0x1370 mm/filemap.c:1088 wait_on_page_bit+0x44/0x50 mm/filemap.c:1127 wait_on_page_writeback include/linux/pagemap.h:546 [inline] truncate_inode_pages_range+0x1389/0x2ad0 mm/truncate.c:447 truncate_inode_pages+0x25/0x30 mm/truncate.c:475 swap_inode_boot_loader fs/ext4/ioctl.c:144 [inline] ext4_ioctl+0xf85/0x4010 fs/ext4/ioctl.c:902 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 28 c3 e8 aa 20 00 00 eb a8 cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 2e 48 83 ec 18 48 89 6c 24 10 48 <8d> 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 RSP: 002b:00007f21854d8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f21854d96d4 R13: 00000000004c00e6 R14: 00000000004d1798 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by kworker/0:1/12: #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000009c5883e3 ((wq_completion)"events"){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124 #1: 0000000093f2a0c9 (xfrm_state_gc_work){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128 1 lock held by khungtaskd/1033: #0: 00000000b6a3652e (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 3 locks held by kworker/u4:3/2460: #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000040fd9ab5 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124 #1: 00000000750e078a ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128 #2: 00000000cf072e37 (&type->s_umount_key#37){.+.+}, at: trylock_super+0x22/0x110 fs/super.c:412 1 lock held by rsyslogd/7197: #0: 00000000e0ad55a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:766 2 locks held by getty/7288: #0: 0000000070161495 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000d32f8da2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7289: #0: 0000000084653171 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000000cdb7da3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7290: #0: 00000000731e46c0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003c003e28 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7291: #0: 0000000085c73c92 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000295434fb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7292: #0: 00000000508e4844 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000084878ea7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7293: #0: 00000000842bfcb3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000510ee861 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7294: #0: 00000000e6d804fa (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000078c91851 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1e80 drivers/tty/n_tty.c:2154 3 locks held by kworker/u4:7/7775: #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000061596cef ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124 #1: 000000006a50d3ea (net_cleanup_work){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128 #2: 00000000d25c1b08 (pernet_ops_rwsem){++++}, at: cleanup_net+0x126/0xb10 net/core/net_namespace.c:518 3 locks held by syz-executor0/31639: #0: 00000000c17da6b2 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline] #0: 00000000c17da6b2 (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 00000000b2f194d8 (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline] #1: 00000000b2f194d8 (&type->i_mutex_dir_key#3/1){+.+.}, at: do_rmdir+0x305/0x580 fs/namei.c:3928 #2: 00000000a5bb6c27 (&type->i_mutex_dir_key#3){++++}, at: inode_lock include/linux/fs.h:757 [inline] #2: 00000000a5bb6c27 (&type->i_mutex_dir_key#3){++++}, at: vfs_rmdir fs/namei.c:3869 [inline] #2: 00000000a5bb6c27 (&type->i_mutex_dir_key#3){++++}, at: vfs_rmdir+0xe1/0x470 fs/namei.c:3858 3 locks held by syz-executor5/804: #0: 00000000c17da6b2 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline] #0: 00000000c17da6b2 (sb_writers#3){.+.+}, at: mnt_want_write_file+0x68/0x110 fs/namespace.c:418 #1: 00000000a379233f (&sb->s_type->i_mutex_key#10){++++}, at: inode_lock include/linux/fs.h:757 [inline] #1: 00000000a379233f (&sb->s_type->i_mutex_key#10){++++}, at: lock_two_nondirectories+0xfa/0x120 fs/inode.c:1010 #2: 00000000c51a31c0 (&sb->s_type->i_mutex_key#10/4){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline] #2: 00000000c51a31c0 (&sb->s_type->i_mutex_key#10/4){+.+.}, at: lock_two_nondirectories+0xdd/0x120 fs/inode.c:1012 5 locks held by ipvs-b:5:0/835: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1033 Comm: khungtaskd Not tainted 4.20.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xbd2/0x10b0 kernel/hung_task.c:289 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 835 Comm: ipvs-b:5:0 Not tainted 4.20.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2016 [inline] RIP: 0010:xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] RIP: 0010:xfrm_policy_lookup_bytype+0xb58/0xdb0 net/xfrm/xfrm_policy.c:2113 Code: 27 bf fa 49 c1 ed 03 b9 f8 f8 ff ff 66 43 89 4c 25 00 e9 d8 fe ff ff e8 36 27 bf fa 0f 0b e8 2f 27 bf fa 0f 0b e8 28 27 bf fa <48> 8b 85 18 fe ff ff 48 8d 7b 08 c6 00 00 48 89 f8 48 c1 e8 03 42 RSP: 0018:ffff8880ae707180 EFLAGS: 00000206 RAX: ffff88808f97a480 RBX: ffff8880639da900 RCX: ffffffff86c215a6 RDX: 0000000000000100 RSI: ffffffff86c21778 RDI: 0000000000000005 RBP: ffff8880ae707388 R08: ffff88808f97a480 R09: 0000000000000000 R10: ffff88808f97a480 R11: 0000000000000000 R12: dffffc0000000000 R13: 00000000fffffffd R14: ffff8880639da9b4 R15: 00000000ffffffff FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e124000 CR3: 000000000986e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x8cf/0x2a90 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xad/0xc0 net/ipv4/route.c:2582 ip_route_output_ports include/net/route.h:161 [inline] igmpv3_newpack+0x54c/0x14a0 net/ipv4/igmp.c:362 add_grhead.isra.0+0x235/0x300 net/ipv4/igmp.c:433 add_grec+0x1086/0x1370 net/ipv4/igmp.c:566 igmpv3_send_cr net/ipv4/igmp.c:696 [inline] igmp_ifc_timer_expire+0x5c2/0xbd0 net/ipv4/igmp.c:793 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:console_unlock+0xd46/0x11e0 kernel/printk/printk.c:2416 Code: 48 c1 e8 03 80 3c 08 00 0f 85 d2 03 00 00 48 83 3d ce ec 2a 08 00 0f 84 b9 02 00 00 e8 f3 db 19 00 48 8b bd 10 ff ff ff 57 9d <0f> 1f 44 00 00 e9 5c ff ff ff e8 db db 19 00 48 8b 7d 08 c7 05 cd RSP: 0018:ffff88805ffffa60 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f97a480 RBX: 0000000000000200 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff816762ad RDI: 0000000000000293 RBP: ffff88805ffffb80 R08: 0000000000000006 R09: ffff88808f97ad20 R10: ffff88808f97a480 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff849d78b0 R14: ffffffff89f6d470 R15: 0000000000028c01 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 sync_thread_backup+0x13e/0x670 net/netfilter/ipvs/ip_vs_sync.c:1720 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352