From 8f40fc7a1bcc3b7c4bc2981832bffd3f9ac9ed6e Mon Sep 17 00:00:00 2001
From: Clayton Craft <clayton@craftyguy.net>
Date: Wed, 19 Mar 2025 09:11:30 -0700
Subject: [PATCH] kms: protect against potential overflow of Duration when
 calculating avg frametime

Also see: https://github.com/Smithay/smithay/pull/1685

Fixes #1062

Co-authored-by: Victoria Brekenfeld <victoria@system76.com>
---
 src/backend/kms/surface/timings.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/kms/surface/timings.rs b/src/backend/kms/surface/timings.rs
index 48cdbf7f..28dcc9d3 100644
--- a/src/backend/kms/surface/timings.rs
+++ b/src/backend/kms/surface/timings.rs
@@ -213,7 +213,7 @@ impl Timings {
                 .rev()
                 .take(window)
                 .map(|f| f.frame_time())
-                .sum::<Duration>()
+                .try_fold(Duration::ZERO, |acc, x| acc.checked_add(x))?
                 / (window.min(self.previous_frames.len()) as u32),
         )
     }