From a0f186232e995962384bfae1c3ef2d42bc920ad9 Mon Sep 17 00:00:00 2001
From: Dominik Maier <domenukk@gmail.com>
Date: Thu, 10 Dec 2020 21:03:39 +0100
Subject: [PATCH] fixed bug in mutator

---
 afl/src/mutators/mutations.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/afl/src/mutators/mutations.rs b/afl/src/mutators/mutations.rs
index 1e4fe95fa1..572bc908c1 100644
--- a/afl/src/mutators/mutations.rs
+++ b/afl/src/mutators/mutations.rs
@@ -467,7 +467,7 @@ where
 
     let off = rand.below(size as u64) as usize;
     let len = rand.below((size - off) as u64) as usize;
-    input.bytes_mut().drain(off..len);
+    input.bytes_mut().drain(off..off + len);
 
     Ok(MutationResult::Mutated)
 }