rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P1131/3:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=23217, q=42237 ncpus=2)
task:kworker/u8:9    state:R  running task     stack:21448 pid:1131  tgid:1131  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: tipc_send tipc_conn_send_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x16dc/0x5500 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 61 1c a2 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 2b 87 fc 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 d0 e5 a5 09 cc 48 8d 3d 58 96 11
RSP: 0018:ffffc900064e6f70 EFLAGS: 00000282
RAX: 4f87a43ff6e12600 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000d25ff474 RSI: ffffffff8daf488b RDI: ffffffff8bca7780
RBP: ffffffff8ae485d5 R08: ffffffff8ae485d5 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: 0000000000000002
R13: ffffffff8e1c3000 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:840 [inline]
 net_generic include/net/netns/generic.h:45 [inline]
 tipc_net net/tipc/core.h:152 [inline]
 tipc_own_addr+0x61/0x2a0 net/tipc/addr.h:93
 tipc_group_member_evt+0x109/0x1270 net/tipc/group.c:879
 tipc_sk_proto_rcv+0x2d3/0x1810 net/tipc/socket.c:2175
 tipc_sk_filter_rcv+0x3005/0x3240 net/tipc/socket.c:2357
 tipc_sk_enqueue net/tipc/socket.c:2450 [inline]
 tipc_sk_rcv+0x8c4/0x2b30 net/tipc/socket.c:2502
 tipc_topsrv_kern_evt net/tipc/topsrv.c:630 [inline]
 tipc_conn_send_to_sock net/tipc/topsrv.c:286 [inline]
 tipc_conn_send_work+0x6cd/0xa50 net/tipc/topsrv.c:306
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>