rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5591/5:b..l P16/2:b..l P5604/2:b..l P4969/1:b..l P3429/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=17877, q=407 ncpus=2)
task:kworker/u8:14   state:R  running task     stack:22560 pid:3429  tgid:3429  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x16ec/0x5620 kernel/sched/core.c:7189
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 41 4f 7b 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 fb 99 c9 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 5b eb
RSP: 0000:ffffc9000e89f4d8 EFLAGS: 00000286
RAX: bc8721c4c5224800 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000037ac8370 RSI: ffffffff8d85f7dc RDI: ffffffff8ba75be0
RBP: ffffffff8176c226 R08: ffffffff8176c226 R09: ffffffff8dfc8000
R10: ffffc9000e89f638 R11: ffffffff81af86c0 R12: 0000000000000002
R13: ffffffff8dfc8000 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
 unwind_next_frame+0xc3/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kmem_cache_free+0x187/0x6c0 mm/slub.c:6378
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:892 [inline]
 nsim_dev_trap_report_work+0x809/0xbd0 drivers/net/netdevsim/dev.c:922
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 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>
task:udevd           state:R  running task     stack:25272 pid:4969  tgid:4969  ppid:1      task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x16ec/0x5620 kernel/sched/core.c:7189
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 41 4f 7b 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 fb 99 c9 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 5b eb
RSP: 0018:ffffc90005307278 EFLAGS: 00000286
RAX: 6aeb11dff2a99b00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000002ff447c8 RSI: ffffffff8d85f7dc RDI: ffffffff8ba75be0
RBP: ffffffff8b1df08c R08: ffffffff8b1df08c R09: ffffffff8dfc8000
R10: dffffc0000000000 R11: fffffbfff1f10c9f R12: 0000000000000002