zig

commit 224fca7e0e1cfe1bf27178ecb4e53d4f88fb9abf (tree)
parent 2b73c28cec9a5c75ab064f1ebd88b12aa64d22dd
Author: Ryan Liptak <squeek502@hotmail.com>
Date:   Wed, 27 Aug 2025 22:16:21 -0700

process.totalSystemMemory: Avoid overflow on Linux when totalram is a 32-bit usize

Fixes #25038

Diffstat:
M
lib/std/process.zig
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git 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;