From 6122bed3af3f9a46b471ba2920e728df4686dc79 Mon Sep 17 00:00:00 2001
From: Jade Lovelace <lix@jade.fyi>
Date: Wed, 6 Mar 2024 21:00:33 -0800
Subject: [PATCH] fix: bounds check result in getMaxCPU

Upstream-Bug: https://github.com/NixOS/nix/issues/9725
Upstream-PR: https://github.com/NixOS/nix/pull/10172
Change-Id: I2b8e8b15ee28951be98e5cbe3ccea5b9c8de5994
---
 src/libutil/util.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 6fcce5d67..691b03bb0 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -796,6 +796,11 @@ unsigned int getMaxCPU()
 
         auto cpuMax = readFile(cpuFile);
         auto cpuMaxParts = tokenizeString<std::vector<std::string>>(cpuMax, " \n");
+
+        if (cpuMaxParts.size() != 2) {
+            return 0;
+        }
+
         auto quota = cpuMaxParts[0];
         auto period = cpuMaxParts[1];
         if (quota != "max")