From 86471990bb00959f737d550ab87b69476a9ea493 Mon Sep 17 00:00:00 2001
From: "NGnius (Graham)" <ngniusness@gmail.com>
Date: Mon, 5 Sep 2022 21:56:15 -0400
Subject: [PATCH] Clamp JSON CPU count to available CPU count

---
 backend/Cargo.lock              |  2 +-
 backend/src/settings/general.rs | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 3c530c9..2f30d12 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -567,7 +567,7 @@ dependencies = [
 
 [[package]]
 name = "powertools-rs"
-version = "1.0.0-rc2"
+version = "1.0.0"
 dependencies = [
  "log",
  "serde",
diff --git a/backend/src/settings/general.rs b/backend/src/settings/general.rs
index 1ea88bf..8fe0975 100644
--- a/backend/src/settings/general.rs
+++ b/backend/src/settings/general.rs
@@ -101,9 +101,24 @@ impl Settings {
 
     fn convert_cpus(mut cpus: Vec<CpuJson>, version: u64) -> Vec<Cpu> {
         let mut result = Vec::with_capacity(cpus.len());
+        let max_cpus = Cpu::cpu_count();
         for (i, cpu) in cpus.drain(..).enumerate() {
+            // prevent having more CPUs than available
+            if let Some(max_cpus) = max_cpus {
+                if i == max_cpus {
+                    break;
+                }
+            }
             result.push(Cpu::from_json(cpu, version, i));
         }
+        if let Some(max_cpus) = max_cpus {
+            if result.len() != max_cpus {
+                let mut sys_cpus = Cpu::system_default();
+                for i in result.len()..sys_cpus.len() {
+                    result.push(sys_cpus.remove(i));
+                }
+            }
+        }
         result
     }