rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P56/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=160245, q=501 ncpus=2)
task:kworker/u8:3    state:R  running task     stack:20448 pid:56    tgid:56    ppid:2      task_flags:0x4208160 flags:0x00080000
Workqueue: events_unbound nsim_dev_trap_report_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1709/0x5530 kernel/sched/core.c:7231
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7553
 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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:114 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:128 [inline]
RIP: 0010:lock_release+0x94/0x3c0 kernel/locking/lockdep.c:5924
Code: 85 17 02 00 00 65 4c 8b 3d d1 30 fd 10 41 83 bf 0c 0c 00 00 00 0f 85 01 02 00 00 49 81 3e a0 f4 5f 93 0f 84 f4 01 00 00 9c 5b <fa> 48 c7 c7 67 13 8a 8d e8 df 92 a5 09 65 ff 05 88 76 fd 10 c7 44
RSP: 0018:ffffc9000122f760 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000206 RCX: 0000000080000001
RDX: ffffc9000122f860 RSI: ffffffff8bca9460 RDI: ffffffff8bca9420
RBP: ffffc9000122f8d0 R08: ffffea0000f2d810 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3880 R12: 0000000000000006
R13: ffffffff82271ce8 R14: ffff88813feadd58 R15: ffff888020abddc0
 rt_spin_unlock+0x29/0x200 kernel/locking/spinlock_rt.c:80
 spin_unlock_irqrestore include/linux/spinlock_rt.h:129 [inline]
 get_partial_node_bulk mm/slub.c:3821 [inline]
 __refill_objects_node+0x1e8/0x5b0 mm/slub.c:7180
 refill_objects+0x56/0x350 mm/slub.c:7308
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __do_kmalloc_node mm/slub.c:5338 [inline]
 __kmalloc_node_track_caller_noprof+0x616/0x7b0 mm/slub.c:5468
 kmalloc_reserve net/core/skbuff.c:637 [inline]
 __alloc_skb+0x2bd/0x7a0 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1384 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline]
 nsim_dev_trap_report_work+0x2b1/0xcb0 drivers/net/netdevsim/dev.c:922
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 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>