rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5935/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=32885, q=61722 ncpus=2)
task:kworker/1:6     state:R  running task     stack:21096 pid:5935  tgid:5935  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events free_obj_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7291
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:unwind_next_frame+0x1822/0x2390 arch/x86/kernel/unwind_orc.c:665
Code: 48 8b 7c 24 70 0f 85 54 01 00 00 48 8b 44 24 58 80 3c 28 00 74 05 e8 bd a0 b0 00 4d 8b 66 38 49 8d 7e 08 48 89 f8 48 c1 e8 03 <80> 3c 28 00 74 05 e8 a3 a0 b0 00 4d 8b 6e 08 4d 8d 7e 10 4c 89 f8
RSP: 0018:ffffc9000467f498 EFLAGS: 00000a02
RAX: 1ffff920008cfeae RBX: ffffffff90554b01 RCX: 0000000000000001
RDX: ffffc9000467f5a8 RSI: dffffc0000000000 RDI: ffffc9000467f570
RBP: dffffc0000000000 R08: ffffc9000467fd70 R09: 0000000000000000
R10: ffffc9000467f5b8 R11: fffff520008cfeb9 R12: ffffc9000467fd80
R13: ffffc9000467f5b8 R14: ffffc9000467f568 R15: ffffffff8173bd25
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
 kasan_save_free_info mm/kasan/kasan.h:406 [inline]
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2507 [inline]
 slab_free mm/slub.c:6557 [inline]
 kmem_cache_free+0x19b/0x690 mm/slub.c:6668
 free_object_list lib/debugobjects.c:326 [inline]
 free_obj_work+0x377/0x4a0 lib/debugobjects.c:513
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>