From 821c03bf9fa130389cd4e05fb44de8095945408f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20Mei=C3=9Fner?= <AlexanderMeissner@gmx.net>
Date: Thu, 14 Nov 2024 19:37:31 +0100
Subject: [PATCH] Documents E_FLAGS_OFFSET.

---
 src/elf.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/elf.rs b/src/elf.rs
index 1be29904..2eb1864f 100644
--- a/src/elf.rs
+++ b/src/elf.rs
@@ -372,7 +372,12 @@ impl<C: ContextObject> Executable<C> {
 
     /// Fully loads an ELF
     pub fn load(bytes: &[u8], loader: Arc<BuiltinProgram<C>>) -> Result<Self, ElfError> {
-        let e_flags = LittleEndian::read_u32(bytes.get(48..52).ok_or(ElfParserError::OutOfBounds)?);
+        const E_FLAGS_OFFSET: usize = 48;
+        let e_flags = LittleEndian::read_u32(
+            bytes
+                .get(E_FLAGS_OFFSET..E_FLAGS_OFFSET.saturating_add(std::mem::size_of::<u32>()))
+                .ok_or(ElfParserError::OutOfBounds)?,
+        );
         let config = loader.get_config();
         let sbpf_version = if config.enabled_sbpf_versions.end() == &SBPFVersion::V1 {
             if e_flags == EF_SBPF_V2 {