From cbeeb51cee708d7d6b55b9e1419895ff2768ccbf Mon Sep 17 00:00:00 2001
From: Jeong Yunwon <jeong@youknowone.org>
Date: Tue, 17 May 2022 05:53:13 +0900
Subject: [PATCH] Fix lcg_random overflow

---
 common/src/hash.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/src/hash.rs b/common/src/hash.rs
index c0b7945faf..c3f13e74d5 100644
--- a/common/src/hash.rs
+++ b/common/src/hash.rs
@@ -186,8 +186,8 @@ pub fn mod_int(value: i64) -> PyHash {
 
 pub fn lcg_urandom(mut x: u32, buf: &mut [u8]) {
     for b in buf {
-        x *= 214013;
-        x += 2531011;
+        x = x.wrapping_mul(214013);
+        x = x.wrapping_add(2531011);
         *b = ((x >> 16) & 0xff) as u8;
     }
 }