From 942c6a42ac9395d523bdebd3978d938915672aec Mon Sep 17 00:00:00 2001
From: Rowan Hart <rowanbhart@gmail.com>
Date: Tue, 22 Aug 2023 23:23:52 -0700
Subject: [PATCH] Reset headers with a memcpy, not an assign from zeroed
 (#1443)

---
 libafl/src/observers/cmp.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libafl/src/observers/cmp.rs b/libafl/src/observers/cmp.rs
index 34dfc67f84..eca533190d 100644
--- a/libafl/src/observers/cmp.rs
+++ b/libafl/src/observers/cmp.rs
@@ -631,7 +631,6 @@ pub struct AFLppCmpHeader {
     #[bitfield(name = "reserved", ty = "u32", bits = "60..=63")]
     data: [u8; 8],
 }
-
 /// The AFL++ `cmp_operands` struct
 #[derive(Default, Debug, Clone, Copy)]
 #[repr(C, packed)]
@@ -814,8 +813,8 @@ impl CmpMap for AFLppCmpMap {
 
     fn reset(&mut self) -> Result<(), Error> {
         // For performance, we reset just the headers
-        self.headers = unsafe { core::mem::zeroed() };
-        // self.vals.operands = unsafe { core::mem::zeroed() };
+        self.headers.fill(AFLppCmpHeader { data: [0; 8] });
+
         Ok(())
     }
 }