rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P1027/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=23685, q=1015153 ncpus=2)
task:kworker/u8:7    state:R  running task     stack:21248 pid:1027  tgid:1027  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound bpf_map_free_deferred
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 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:orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
RIP: 0010:unwind_next_frame+0x1b4/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 8b 2f 48 83 f3 01 48 c7 c2 20 b5 e9 8b 48 29 dd 0f 84 b5 02 00 00 48 81 fd 00 00 00 81 0f 92 c0 48 81 fd 58 e3 d2 8b 0f 93 c1 <08> c1 0f 85 0b 01 00 00 48 c7 c0 00 00 00 81 49 89 ef 49 29 c7 49
RSP: 0018:ffffc900051f75c0 EFLAGS: 00000297
RAX: 1ffff92000a3ee00 RBX: 0000000000000001 RCX: 0000000080000000
RDX: ffffffff8be9b520 RSI: ffffffff8c4bd360 RDI: ffffffff8c4bd320
RBP: ffffffff822252e3 R08: ffffffff8176f27f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: dffffc0000000000
R13: ffffffff8176f27f R14: ffffc900051f7668 R15: ffffc900051f76b0
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1406 [inline]
 free_pages_prepare+0x960/0xa60 mm/page_alloc.c:1451
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:6897
 __free_contig_range mm/page_alloc.c:6942 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5257
 vm_area_free_pages mm/vmalloc.c:3439 [inline]
 vfree+0x224/0x4a0 mm/vmalloc.c:3488
 sock_map_free+0x37e/0x3c0 net/core/sock_map.c:368
 bpf_map_free+0x19a/0x3f0 kernel/bpf/syscall.c:898
 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>