rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P16485/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=69161, q=799 ncpus=2)
task:dhcpcd          state:R  running task     stack:26032 pid:16485 tgid:16485 ppid:5483   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5814
Code: b8 ff ff ff ff 65 0f c1 05 e0 c3 8b 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc90003fc73e8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff920007f8e7e RCX: 00000000a00f5106
RDX: 0000000000000001 RSI: ffffffff8b6cdcc0 RDI: ffffffff8bd217a0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2dcaf98
R10: ffffffff96e57cc7 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8e1bb900 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 is_bpf_text_address+0x36/0x1a0 kernel/bpf/core.c:772
 kernel_text_address kernel/extable.c:125 [inline]
 kernel_text_address+0x8d/0x100 kernel/extable.c:94
 __kernel_text_address+0xd/0x40 kernel/extable.c:79
 unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0xa7/0x100 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free_freelist_hook mm/slub.c:2382 [inline]
 slab_free_bulk mm/slub.c:4637 [inline]
 kmem_cache_free_bulk.part.0+0x293/0x7f0 mm/slub.c:5001
 mt_free_bulk lib/maple_tree.c:191 [inline]
 mas_destroy+0x58a/0x9e0 lib/maple_tree.c:5600
 mas_store_gfp+0x729/0xfe0 lib/maple_tree.c:5491
 vma_iter_clear_gfp include/linux/mm.h:1039 [inline]
 do_vmi_align_munmap+0x5ce/0x890 mm/vma.c:1439
 do_vmi_munmap+0x20b/0x3e0 mm/vma.c:1492
 __vm_munmap+0x14f/0x340 mm/mmap.c:1372
 __do_sys_munmap mm/mmap.c:1389 [inline]
 __se_sys_munmap mm/mmap.c:1386 [inline]
 __x64_sys_munmap+0x59/0x80 mm/mmap.c:1386
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f25bce05b97
RSP: 002b:00007fffde586878 EFLAGS: 00000202 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055e4d74083c0 RCX: 00007f25bce05b97
RDX: 0000000000000001 RSI: 0000000000023910 RDI: 00007f25bcc05000
RBP: 00007fffde586970 R08: 0000000000000000 R09: 0d21f0d9604210a5
R10: 00007fffde586800 R11: 0000000000000202 R12: 00007f25bce19000
R13: 0000000000000000 R14: 000055e4d74083c0 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10547 jiffies! g69161 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111