From cc4931b3258ec764f0769ee573ed8a2989664d3a Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 27 Oct 2025 17:03:16 -0700
Subject: [PATCH] std.Io.Threaded: fix 32-bit overflow in lookupDns

be a little more careful with nanoseconds
---
 lib/std/Io/Threaded.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index dae9089e90..b3646cb88e 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -5235,7 +5235,7 @@ fn lookupDns(
     var now_ts = try clock.now(t_io);
     const final_ts = now_ts.addDuration(.fromSeconds(rc.timeout_seconds));
     const attempt_duration: Io.Duration = .{
-        .nanoseconds = std.time.ns_per_s * @as(usize, rc.timeout_seconds) / rc.attempts,
+        .nanoseconds = (std.time.ns_per_s / rc.attempts) * @as(i96, rc.timeout_seconds),
     };
 
     send: while (now_ts.nanoseconds < final_ts.nanoseconds) : (now_ts = try clock.now(t_io)) {