From cbc3c0dc594341faddb8841fb466254f2f6f3b35 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Wed, 27 Aug 2025 22:16:21 -0700
Subject: [PATCH] process.totalSystemMemory: Avoid overflow on Linux when
 totalram is a 32-bit usize

Fixes #25038
---
 lib/std/process.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/std/process.zig b/lib/std/process.zig
index 305bcca24b..efe0a9b0e9 100644
--- a/lib/std/process.zig
+++ b/lib/std/process.zig
@@ -1753,7 +1753,8 @@ pub fn totalSystemMemory() TotalSystemMemoryError!u64 {
             if (std.os.linux.E.init(result) != .SUCCESS) {
                 return error.UnknownTotalSystemMemory;
             }
-            return info.totalram * info.mem_unit;
+            // Promote to u64 to avoid overflow on systems where info.totalram is a 32-bit usize
+            return @as(u64, info.totalram) * info.mem_unit;
         },
         .freebsd => {
             var physmem: c_ulong = undefined;