rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12223/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=68953, q=442 ncpus=2)
task:dhcpcd-run-hook state:R  running task     stack:22256 pid:12223 tgid:12223 ppid:4757   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_check_range+0x5/0x290 mm/kasan/generic.c:188
Code: 8d e8 ff 9d e3 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <41> 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37
RSP: 0018:ffffc900033972b0 EFLAGS: 00000207
RAX: ffffffff8b7dea01 RBX: ffffc900033973b8 RCX: ffffffff8b7dea41
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff94bd76c0
RBP: ffffc900033974b0 R08: 0000000000000003 R09: fffffbfff297aed4
R10: dffffc0000000000 R11: fffffbfff297aed4 R12: 1ffff92000672e7b
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88805f79e1f0
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
 mt_validate_nulls lib/maple_tree.c:7547 [inline]
 mt_validate+0x4331/0x4aa0 lib/maple_tree.c:7596
 validate_mm+0xe7/0x530 mm/mmap.c:329
 __split_vma+0xaca/0xc30 mm/mmap.c:2481
 do_vmi_align_munmap+0x433/0x18c0 mm/mmap.c:2646
 do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2800
 mmap_region+0x72f/0x2090 mm/mmap.c:2851
 do_mmap+0x8ad/0xfa0 mm/mmap.c:1438
 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1484
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f722d7d2b74
RSP: 002b:00007ffe0b6fd558 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ffe0b6fd5d0 RCX: 00007f722d7d2b74
RDX: 0000000000000001 RSI: 0000000000053000 RDI: 00007f722d686000
RBP: 00007ffe0b6fdcf0 R08: 0000000000000003 R09: 000000000014b000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007f722d7af5c0
R13: 00007ffe0b6fdd78 R14: 000000000014ab8e R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10542 jiffies! g68953 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111