rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14284/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=75617, q=597433 ncpus=2)
task:kworker/0:3     state:R  running task     stack:28464 pid:14284 tgid:14284 ppid:2      task_flags:0x4208060 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5352 [inline]
 __schedule+0x165c/0x5560 kernel/sched/core.c:6964
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7292
 irqentry_exit+0x5e4/0x700 kernel/entry/common.c:240
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lookup_page_ext mm/page_ext.c:256 [inline]
RIP: 0010:page_ext_lookup+0xdf/0x180 mm/page_ext.c:513
Code: 0f e8 b5 27 8b ff eb 05 e8 ae 27 8b ff 45 31 f6 49 83 c6 10 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 d1 79 f4 ff <49> 8b 1e e8 79 71 6f ff 89 c5 31 ff 89 c6 e8 be 2b 8b ff 85 ed 74
RSP: 0018:ffffc9000d2b7640 EFLAGS: 00000246
RAX: 1ffff11027fc102a RBX: 0000000000000140 RCX: ffff8880335f0000
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff823b2e5a R09: ffffffff8e75d7e0
R10: dffffc0000000000 R11: ffffed100f8f0640 R12: 00000000000528db
R13: dffffc0000000000 R14: ffff88813fe08150 R15: 0000000000001000
 page_ext_iter_begin include/linux/page_ext.h:133 [inline]
 __page_table_check_zero+0x135/0x3e0 mm/page_table_check.c:139
 page_table_check_free include/linux/page_table_check.h:46 [inline]
 __free_pages_prepare mm/page_alloc.c:1402 [inline]
 __free_frozen_pages+0xc00/0xd00 mm/page_alloc.c:2942
 __slab_free+0x274/0x2c0 mm/slub.c:5605
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4569 [inline]
 slab_alloc_node mm/slub.c:4898 [inline]
 __do_kmalloc_node mm/slub.c:5291 [inline]
 __kmalloc_node_track_caller_noprof+0x493/0x7b0 mm/slub.c:5400
 kvasprintf+0xeb/0x1a0 lib/kasprintf.c:25
 __kthread_create_on_node+0x1cf/0x3f0 kernel/kthread.c:491
 kthread_create_on_node+0xeb/0x140 kernel/kthread.c:559
 create_worker+0x2e2/0x7e0 kernel/workqueue.c:2817
 maybe_create_worker kernel/workqueue.c:3077 [inline]
 manage_workers kernel/workqueue.c:3154 [inline]
 worker_thread+0x53f/0x11e0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>