rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
 P23/1:b..l

rcu: 	(detected by 0, t=10504 jiffies, g=17669, q=4997 ncpus=2)
task:kworker/1:0     state:R
  running task    
 stack:25368 pid:23    tgid:23    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0xeb1/0x4220 kernel/sched/core.c:6911
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7238
 irqentry_exit+0x15a/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:debug_lockdep_rcu_enabled+0x18/0x40 kernel/rcu/update.c:321
Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 8b 05 8a d1 86 03 85 c0 74 20 8b 05 50 e0 86 03 85 c0 74 16 <65> 48 8b 05 d8 f3 8b 05 8b 80 cc 0a 00 00 85 c0 0f 94 c0 0f b6 c0
RSP: 0000:ffffc9000018f1a8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff890010b3 RDI: ffffffff87afc6a0
RBP: ffffc9000018f270 R08: 00000000cbb9a5e1 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: ffffffff819d24f0
R13: ffffc9000018f228 R14: 0000000000000000 R15: ffff888102688000
 rcu_read_lock include/linux/rcupdate.h:851 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0xd6/0x1ea0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4538 [inline]
 slab_alloc_node mm/slub.c:4866 [inline]
 kmem_cache_alloc_noprof+0x2e7/0x6a0 mm/slub.c:4873
 skb_clone+0x190/0x400 net/core/skbuff.c:2120
 do_one_broadcast net/netlink/af_netlink.c:1455 [inline]
 netlink_broadcast_filtered+0xb6a/0xf50 net/netlink/af_netlink.c:1533
 netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1557
 uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
 kobject_uevent_env+0xcdd/0x18b0 lib/kobject_uevent.c:608
 device_add+0x116e/0x1950 drivers/base/core.c:3670
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276
 process_scheduled_works kernel/workqueue.c:3359 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>