rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5883/1:b..l rcu: (detected by 0, t=10503 jiffies, g=14545, q=1355910 ncpus=2) task:kworker/0:4 state:R running task stack:23080 pid:5883 tgid:5883 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:56 [inline] RIP: 0010:unwind_next_frame+0x1648/0x20a0 arch/x86/kernel/unwind_orc.c:665 Code: 8d 7d 08 49 8b 5d 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2e 05 00 00 49 8d 7d 10 49 8b 6d 08 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f RSP: 0018:ffffc90003d0f490 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90003d0f898 RCX: ffffffff9128d72c RDX: 1ffff920007a1ea1 RSI: 0000000000000001 RDI: ffffc90003d0f510 RBP: ffffc90003d08000 R08: ffffffff9128d730 R09: 0000000000000000 R10: 0000000000000005 R11: 00000000000120c0 R12: ffffc90003d0f550 R13: ffffc90003d0f500 R14: ffffc90003d0f898 R15: ffffc90003d0f534 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2680 discard_slab mm/slub.c:2720 [inline] __put_partials+0x16d/0x1c0 mm/slub.c:3189 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4151 [inline] slab_alloc_node mm/slub.c:4200 [inline] __do_kmalloc_node mm/slub.c:4330 [inline] __kmalloc_noprof+0x1d4/0x510 mm/slub.c:4343 kmalloc_noprof include/linux/slab.h:909 [inline] usb_alloc_urb+0x66/0xa0 drivers/usb/core/urb.c:75 usb_internal_control_msg drivers/usb/core/message.c:96 [inline] usb_control_msg+0x1d3/0x4a0 drivers/usb/core/message.c:154 usb_clear_port_feature drivers/usb/core/hub.c:454 [inline] port_event drivers/usb/core/hub.c:5728 [inline] hub_event+0x14fc/0x4fa0 drivers/usb/core/hub.c:5913 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245