rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6991/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=56021, q=472 ncpus=2)
task:kworker/0:7     state:R  running task     stack:22568 pid:6991  tgid:6991  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events rht_deferred_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x116a/0x5de0 kernel/sched/core.c:6785
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7108
 irqentry_exit+0x36/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:211 [inline]
RIP: 0010:unwind_next_frame+0x1c8/0x20a0 arch/x86/kernel/unwind_orc.c:494
Code: 00 00 00 81 0f 82 5b 02 00 00 49 81 ff e7 8a 83 8b 0f 83 4e 02 00 00 8b 35 65 a9 87 0c 4c 89 f8 48 2d 00 00 00 81 48 c1 e8 08 <8d> 56 ff 41 89 c3 39 d0 0f 83 fb 15 00 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc900042bf670 EFLAGS: 00000206
RAX: 00000000000122a3 RBX: 0000000000000001 RCX: 1ffff92000857ee5
RDX: dffffc0000000000 RSI: 00000000000a838c RDI: ffffffff8df26da0
RBP: ffffc900042bf728 R08: 00d2ea75c2f2118f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc900042bf730
R13: ffffc900042bf6e0 R14: ffffc900042bf715 R15: ffffffff8222a319
 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:1248 [inline]
 __free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
 discard_slab mm/slub.c:2717 [inline]
 __put_partials+0x16d/0x1c0 mm/slub.c:3186
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kvmalloc_node_noprof+0x27b/0x620 mm/slub.c:5015
 bucket_table_alloc.isra.0+0x83/0x460 lib/rhashtable.c:186
 rhashtable_rehash_alloc+0x68/0x110 lib/rhashtable.c:367
 rhashtable_shrink lib/rhashtable.c:411 [inline]
 rht_deferred_worker+0x1836/0x1fa0 lib/rhashtable.c:429
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>